commit b10502a0b8651c8d6524d42f48760de0b80a8dd7 Author: Christos Margiolis <christos@margiolis.net> Date: Fri, 11 Feb 2022 22:56:25 +0200 initial commit Diffstat:
| A | LICENSE | | | 20 | ++++++++++++++++++++ |
| A | README | | | 2 | ++ |
| A | doc/bme280_datasheet.pdf | | | 0 | |
| A | doc/lcd_datasheet.pdf | | | 0 | |
| A | doc/pic16f87xa_datasheet.pdf | | | 0 | |
| A | schem/fp-info-cache | | | 1 | + |
| A | schem/layout.kicad_wks | | | 18 | ++++++++++++++++++ |
| A | schem/pic-cache.lib | | | 277 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | schem/pic.pdf | | | 0 | |
| A | schem/pic.pro | | | 248 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | schem/pic.sch | | | 473 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | schem/pic.sch-bak | | | 473 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | src/Makefile | | | 40 | ++++++++++++++++++++++++++++++++++++++++ |
| A | src/bme280.c | | | 210 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | src/bme280.h | | | 10 | ++++++++++ |
| A | src/extern.h | | | 25 | +++++++++++++++++++++++++ |
| A | src/i2c.c | | | 67 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | src/i2c.h | | | 19 | +++++++++++++++++++ |
| A | src/lcd.c | | | 50 | ++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | src/lcd.h | | | 26 | ++++++++++++++++++++++++++ |
| A | src/main.c | | | 137 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | src/tmr0.c | | | 76 | ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | src/tmr0.h | | | 30 | ++++++++++++++++++++++++++++++ |
| A | src/util.c | | | 27 | +++++++++++++++++++++++++++ |
| A | src/util.h | | | 7 | +++++++ |
25 files changed, 2236 insertions(+), 0 deletions(-)
diff --git a/LICENSE b/LICENSE @@ -0,0 +1,20 @@ +MIT License + +(c) 2022-Present Christos Margiolis <christos@margiolis.net> + +Permission is hereby granted, free of charge, to any person obtaining a copy of +this software and associated documentation files (the “Software”), to deal in +the Software without restriction, including without limitation the rights to use, +copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the +Software, and to permit persons to whom the Software is furnished to do so, +subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS +FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR +COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER +IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. diff --git a/README b/README @@ -0,0 +1,2 @@ +Temperature and humidity measurement using PIC16F877A and BME280. +https://margiolis.net/articles/thermometer-using-pic16f877a-and-bme280.html diff --git a/doc/bme280_datasheet.pdf b/doc/bme280_datasheet.pdf Binary files differ. diff --git a/doc/lcd_datasheet.pdf b/doc/lcd_datasheet.pdf Binary files differ. diff --git a/doc/pic16f87xa_datasheet.pdf b/doc/pic16f87xa_datasheet.pdf Binary files differ. diff --git a/schem/fp-info-cache b/schem/fp-info-cache @@ -0,0 +1 @@ +0 diff --git a/schem/layout.kicad_wks b/schem/layout.kicad_wks @@ -0,0 +1,18 @@ +(page_layout + (setup (textsize 1.5 1.5)(linewidth 0.15)(textlinewidth 0.15) + (left_margin 10)(right_margin 10)(top_margin 10)(bottom_margin 10)) + (rect (name rect1:Rect) (start 0 0 ltcorner) (end 0 0) (repeat 2) (incrx 2) (incry 2)) + (line (name segm1:Line) (start 50 2 ltcorner) (end 50 0 ltcorner) (repeat 30) (incrx 50)) + (tbtext 1 (name text1:Text) (pos 25 1 ltcorner) (font (size 1.3 1.3)) (repeat 100) (incrx 50)) + (line (name segm2:Line) (start 50 2 lbcorner) (end 50 0 lbcorner) (repeat 30) (incrx 50)) + (tbtext 1 (name text2:Text) (pos 25 1 lbcorner) (font (size 1.3 1.3)) (repeat 100) (incrx 50)) + (line (name segm3:Line) (start 0 50 ltcorner) (end 2 50 ltcorner) (repeat 30) (incry 50)) + (tbtext A (name text3:Text) (pos 1 25 ltcorner) (font (size 1.3 1.3)) (justify center) (repeat 100) (incry 50)) + (line (name segm4:Line) (start 0 50 rtcorner) (end 2 50 rtcorner) (repeat 30) (incry 50)) + (tbtext A (name text4:Text) (pos 1 25 rtcorner) (font (size 1.3 1.3)) (justify center) (repeat 100) (incry 50)) + (tbtext %Y (name text5:Text) (pos 109 20) (font bold)) + (tbtext %C0 (name text6:Text) (pos 109 23)) + (tbtext %C1 (name text7:Text) (pos 109 26)) + (tbtext %C2 (name text8:Text) (pos 109 29)) + (tbtext %C3 (name text9:Text) (pos 109 32)) +) diff --git a/schem/pic-cache.lib b/schem/pic-cache.lib @@ -0,0 +1,277 @@ +EESchema-LIBRARY Version 2.4 +#encoding utf-8 +# +# Device_C_Small +# +DEF Device_C_Small C 0 10 N N 1 F N +F0 "C" 10 70 50 H V L CNN +F1 "Device_C_Small" 10 -80 50 H V L CNN +F2 "" 0 0 50 H I C CNN +F3 "" 0 0 50 H I C CNN +$FPLIST + C_* +$ENDFPLIST +DRAW +P 2 0 1 13 -60 -20 60 -20 N +P 2 0 1 12 -60 20 60 20 N +X ~ 1 0 100 80 D 50 50 1 1 P +X ~ 2 0 -100 80 U 50 50 1 1 P +ENDDRAW +ENDDEF +# +# Device_Crystal +# +DEF Device_Crystal Y 0 40 N N 1 F N +F0 "Y" 0 150 50 H V C CNN +F1 "Device_Crystal" 0 -150 50 H V C CNN +F2 "" 0 0 50 H I C CNN +F3 "" 0 0 50 H I C CNN +$FPLIST + Crystal* +$ENDFPLIST +DRAW +S -45 100 45 -100 0 1 12 N +P 2 0 1 0 -100 0 -75 0 N +P 2 0 1 20 -75 -50 -75 50 N +P 2 0 1 20 75 -50 75 50 N +P 2 0 1 0 100 0 75 0 N +X 1 1 -150 0 50 R 50 50 1 1 P +X 2 2 150 0 50 L 50 50 1 1 P +ENDDRAW +ENDDEF +# +# Device_LED +# +DEF Device_LED D 0 40 N N 1 F N +F0 "D" 0 100 50 H V C CNN +F1 "Device_LED" 0 -100 50 H V C CNN +F2 "" 0 0 50 H I C CNN +F3 "" 0 0 50 H I C CNN +$FPLIST + LED* + LED_SMD:* + LED_THT:* +$ENDFPLIST +DRAW +P 2 0 1 10 -50 -50 -50 50 N +P 2 0 1 0 -50 0 50 0 N +P 4 0 1 10 50 -50 50 50 -50 0 50 -50 N +P 5 0 1 0 -120 -30 -180 -90 -150 -90 -180 -90 -180 -60 N +P 5 0 1 0 -70 -30 -130 -90 -100 -90 -130 -90 -130 -60 N +X K 1 -150 0 100 R 50 50 1 1 P +X A 2 150 0 100 L 50 50 1 1 P +ENDDRAW +ENDDEF +# +# Device_R_POT_US +# +DEF Device_R_POT_US RV 0 40 Y N 1 F N +F0 "RV" -175 0 50 V V C CNN +F1 "Device_R_POT_US" -100 0 50 V V C CNN +F2 "" 0 0 50 H I C CNN +F3 "" 0 0 50 H I C CNN +$FPLIST + Potentiometer* +$ENDFPLIST +DRAW +P 2 0 1 0 0 -90 0 -100 N +P 2 0 1 0 0 100 0 90 N +P 2 0 1 0 100 0 60 0 N +P 4 0 1 0 45 0 90 20 90 -20 45 0 F +P 5 0 1 0 0 -30 40 -45 0 -60 -40 -75 0 -90 N +P 5 0 1 0 0 30 40 15 0 0 -40 -15 0 -30 N +P 5 0 1 0 0 90 40 75 0 60 -40 45 0 30 N +X 1 1 0 150 50 D 50 50 1 1 P +X 2 2 150 0 50 L 50 50 1 1 P +X 3 3 0 -150 50 U 50 50 1 1 P +ENDDRAW +ENDDEF +# +# Device_R_US +# +DEF Device_R_US R 0 0 N Y 1 F N +F0 "R" 100 0 50 V V C CNN +F1 "Device_R_US" -100 0 50 V V C CNN +F2 "" 40 -10 50 V I C CNN +F3 "" 0 0 50 H I C CNN +$FPLIST + R_* +$ENDFPLIST +DRAW +P 2 0 1 0 0 -90 0 -100 N +P 2 0 1 0 0 90 0 100 N +P 5 0 1 0 0 -30 40 -45 0 -60 -40 -75 0 -90 N +P 5 0 1 0 0 30 40 15 0 0 -40 -15 0 -30 N +P 5 0 1 0 0 90 40 75 0 60 -40 45 0 30 N +X ~ 1 0 150 50 D 50 50 1 1 P +X ~ 2 0 -150 50 U 50 50 1 1 P +ENDDRAW +ENDDEF +# +# Display_Character_NHD-0420H1Z +# +DEF Display_Character_NHD-0420H1Z U 0 20 Y Y 1 F N +F0 "U" -250 750 50 H V C CNN +F1 "Display_Character_NHD-0420H1Z" 200 750 50 H V L CNN +F2 "Display:NHD-0420H1Z" 0 -900 50 H I C CNN +F3 "" 100 -100 50 H I C CNN +$FPLIST + NHD*0420H1Z* +$ENDFPLIST +DRAW +S -300 700 300 -700 0 1 10 f +X VSS 1 0 -800 100 U 50 50 1 1 W +X DB3 10 -400 -200 100 R 50 50 1 1 B +X DB4 11 -400 -300 100 R 50 50 1 1 B +X DB5 12 -400 -400 100 R 50 50 1 1 B +X DB6 13 -400 -500 100 R 50 50 1 1 B +X DB7 14 -400 -600 100 R 50 50 1 1 B +X A 15 400 -300 100 L 50 50 1 1 P +X K 16 400 -200 100 L 50 50 1 1 P +X VDD 2 0 800 100 D 50 50 1 1 W +X VO 3 100 800 100 D 50 50 1 1 W +X RS 4 -400 600 100 R 50 50 1 1 I +X R/W 5 -400 500 100 R 50 50 1 1 I +X E 6 -400 400 100 R 50 50 1 1 I +X DB0 7 -400 100 100 R 50 50 1 1 B +X DB1 8 -400 0 100 R 50 50 1 1 B +X DB2 9 -400 -100 100 R 50 50 1 1 B +ENDDRAW +ENDDEF +# +# MCU_Microchip_PIC16_PIC16F877A-IP +# +DEF MCU_Microchip_PIC16_PIC16F877A-IP U 0 40 Y Y 1 F N +F0 "U" 200 1400 50 H V L CNN +F1 "MCU_Microchip_PIC16_PIC16F877A-IP" 200 1300 50 H V L CNN +F2 "" 0 0 50 H I C CIN +F3 "" 0 0 50 H I C CNN +ALIAS PIC16F877A-IP +$FPLIST + DIP* + PDIP* +$ENDFPLIST +DRAW +S -750 1250 750 -1350 0 1 10 f +X ~MCLR~/Vpp 1 -900 1100 150 R 50 50 1 1 I +X RE2/~CS~/AN7 10 -900 -700 150 R 50 50 1 1 B +X VDD 11 0 1400 150 D 50 50 1 1 W +X VSS 12 0 -1500 150 U 50 50 1 1 W +X OSC1/CLKI 13 -900 800 150 R 50 50 1 1 I +X OSC2/CLKO 14 -900 600 150 R 50 50 1 1 O +X T1OSO/T1CKI/RC0 15 900 -500 150 L 50 50 1 1 B +X T1OSI/CCP2/RC1 16 900 -600 150 L 50 50 1 1 B +X CCP1/RC2 17 900 -700 150 L 50 50 1 1 B +X SCK/SCL/RC3 18 900 -800 150 L 50 50 1 1 B +X RD0/PSP0 19 -900 400 150 R 50 50 1 1 B +X AN0/RA0 2 900 1100 150 L 50 50 1 1 B +X RD1/PSP1 20 -900 300 150 R 50 50 1 1 B +X RD2/PSP2 21 -900 200 150 R 50 50 1 1 B +X RD3/PSP3 22 -900 100 150 R 50 50 1 1 B +X SDI/SDA/RC4 23 900 -900 150 L 50 50 1 1 B +X SDO/RC5 24 900 -1000 150 L 50 50 1 1 B +X CK/TX/RC6 25 900 -1100 150 L 50 50 1 1 B +X DT/RX/RC7 26 900 -1200 150 L 50 50 1 1 B +X RD4/PSP4 27 -900 0 150 R 50 50 1 1 B +X RD5/PSP5 28 -900 -100 150 R 50 50 1 1 B +X RD6/PSP6 29 -900 -200 150 R 50 50 1 1 B +X AN1/RA1 3 900 1000 150 L 50 50 1 1 B +X RD7/PSP7 30 -900 -300 150 R 50 50 1 1 B +X VSS 31 100 -1500 150 U 50 50 1 1 W +X VDD 32 100 1400 150 D 50 50 1 1 W +X INT/RB0 33 900 400 150 L 50 50 1 1 B +X RB1 34 900 300 150 L 50 50 1 1 B +X RB2 35 900 200 150 L 50 50 1 1 B +X PGM/RB3 36 900 100 150 L 50 50 1 1 B +X RB4 37 900 0 150 L 50 50 1 1 B +X RB5 38 900 -100 150 L 50 50 1 1 B +X PGC/RB6 39 900 -200 150 L 50 50 1 1 B +X CVref/Vref-/AN2/RA2 4 900 900 150 L 50 50 1 1 B +X PGD/RB7 40 900 -300 150 L 50 50 1 1 B +X Vref+/AN3/RA3 5 900 800 150 L 50 50 1 1 B +X C1OUT/T0CKI/RA4 6 900 700 150 L 50 50 1 1 B +X ~SS~/C2OUT/AN4/RA5 7 900 600 150 L 50 50 1 1 B +X RE0/~RD~/AN5 8 -900 -500 150 R 50 50 1 1 B +X RE1/~WR~/AN6 9 -900 -600 150 R 50 50 1 1 B +ENDDRAW +ENDDEF +# +# Sensor_BME280 +# +DEF Sensor_BME280 U 0 20 Y Y 1 F N +F0 "U" -350 450 50 H V C CNN +F1 "Sensor_BME280" 300 450 50 H V C CNN +F2 "Package_LGA:Bosch_LGA-8_2.5x2.5mm_P0.65mm_ClockwisePinNumbering" 1500 -450 50 H I C CNN +F3 "" 0 -200 50 H I C CNN +$FPLIST + *LGA*2.5x2.5mm*P0.65mm*Clockwise* +$ENDFPLIST +DRAW +S -400 400 400 -400 0 1 10 f +X GND 1 -100 -600 200 U 50 50 1 1 W +X CSB 2 600 -300 200 L 50 50 1 1 I +X SDI 3 600 -100 200 L 50 50 1 1 B +X SCK 4 600 100 200 L 50 50 1 1 I +X SDO 5 600 300 200 L 50 50 1 1 B +X VDDIO 6 -100 600 200 D 50 50 1 1 W +X GND 7 100 -600 200 U 50 50 1 1 W +X VDD 8 100 600 200 D 50 50 1 1 W +ENDDRAW +ENDDEF +# +# Simulation_SPICE_VDC +# +DEF Simulation_SPICE_VDC V 0 1 N Y 1 F N +F0 "V" 100 100 50 H V L CNN +F1 "Simulation_SPICE_VDC" 100 0 50 H V L CNN +F2 "" 0 0 50 H I C CNN +F3 "" 0 0 50 H I C CNN +F4 "Y" 0 0 50 H I L CNN "Spice_Netlist_Enabled" +F5 "V" 0 0 50 H I L CNN "Spice_Primitive" +F6 "dc(1)" 100 -100 50 H V L CNN "Spice_Model" +DRAW +C 0 0 100 0 1 10 f +T 0 0 75 50 0 0 0 + Normal 0 C C +P 2 0 0 0 -50 10 50 10 N +P 2 0 0 0 -30 -10 -50 -10 N +P 2 0 0 0 10 -10 -10 -10 N +P 2 0 0 0 50 -10 30 -10 N +X ~ 1 0 200 100 D 50 50 1 1 P +X ~ 2 0 -200 100 U 50 50 1 1 P +ENDDRAW +ENDDEF +# +# Switch_SW_Push +# +DEF Switch_SW_Push SW 0 40 N N 1 F N +F0 "SW" 50 100 50 H V L CNN +F1 "Switch_SW_Push" 0 -60 50 H V C CNN +F2 "" 0 200 50 H I C CNN +F3 "" 0 200 50 H I C CNN +DRAW +C -80 0 20 0 1 0 N +C 80 0 20 0 1 0 N +P 2 0 1 0 0 50 0 120 N +P 2 0 1 0 100 50 -100 50 N +X 1 1 -200 0 100 R 50 50 0 1 P +X 2 2 200 0 100 L 50 50 0 1 P +ENDDRAW +ENDDEF +# +# power_GNDREF +# +DEF power_GNDREF #PWR 0 0 Y Y 1 F P +F0 "#PWR" 0 -250 50 H I C CNN +F1 "power_GNDREF" 0 -150 50 H V C CNN +F2 "" 0 0 50 H I C CNN +F3 "" 0 0 50 H I C CNN +DRAW +P 2 0 1 0 -25 -75 25 -75 N +P 2 0 1 0 -5 -100 5 -100 N +P 2 0 1 0 0 -50 0 0 N +P 2 0 1 0 50 -50 -50 -50 N +X GNDREF 1 0 0 0 D 50 50 1 1 W N +ENDDRAW +ENDDEF +# +#End Library diff --git a/schem/pic.pdf b/schem/pic.pdf Binary files differ. diff --git a/schem/pic.pro b/schem/pic.pro @@ -0,0 +1,248 @@ +update=Wed Feb 2 15:50:17 2022 +version=1 +last_client=kicad +[general] +version=1 +RootSch= +BoardNm= +[cvpcb] +version=1 +NetIExt=net +[eeschema] +version=1 +LibDir= +[eeschema/libraries] +[schematic_editor] +version=1 +PageLayoutDescrFile=layout.kicad_wks +PlotDirectoryName=../doc/ +SubpartIdSeparator=0 +SubpartFirstId=65 +NetFmtName=Pcbnew +SpiceAjustPassiveValues=0 +LabSize=50 +ERC_TestSimilarLabels=1 +[pcbnew] +version=1 +PageLayoutDescrFile= +LastNetListRead=pic.net +CopperLayerCount=2 +BoardThickness=1.6 +AllowMicroVias=0 +AllowBlindVias=0 +RequireCourtyardDefinitions=0 +ProhibitOverlappingCourtyards=1 +MinTrackWidth=0.2 +MinViaDiameter=0.4 +MinViaDrill=0.3 +MinMicroViaDiameter=0.2 +MinMicroViaDrill=0.09999999999999999 +MinHoleToHole=0.25 +TrackWidth1=0.25 +ViaDiameter1=0.8 +ViaDrill1=0.4 +dPairWidth1=0.2 +dPairGap1=0.25 +dPairViaGap1=0.25 +SilkLineWidth=0.12 +SilkTextSizeV=1 +SilkTextSizeH=1 +SilkTextSizeThickness=0.15 +SilkTextItalic=0 +SilkTextUpright=1 +CopperLineWidth=0.2 +CopperTextSizeV=1.5 +CopperTextSizeH=1.5 +CopperTextThickness=0.3 +CopperTextItalic=0 +CopperTextUpright=1 +EdgeCutLineWidth=0.05 +CourtyardLineWidth=0.05 +OthersLineWidth=0.15 +OthersTextSizeV=1 +OthersTextSizeH=1 +OthersTextSizeThickness=0.15 +OthersTextItalic=0 +OthersTextUpright=1 +SolderMaskClearance=0 +SolderMaskMinWidth=0 +SolderPasteClearance=0 +SolderPasteRatio=0 +[pcbnew/Layer.F.Cu] +Name=F.Cu +Type=0 +Enabled=1 +[pcbnew/Layer.In1.Cu] +Name=In1.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In2.Cu] +Name=In2.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In3.Cu] +Name=In3.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In4.Cu] +Name=In4.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In5.Cu] +Name=In5.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In6.Cu] +Name=In6.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In7.Cu] +Name=In7.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In8.Cu] +Name=In8.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In9.Cu] +Name=In9.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In10.Cu] +Name=In10.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In11.Cu] +Name=In11.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In12.Cu] +Name=In12.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In13.Cu] +Name=In13.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In14.Cu] +Name=In14.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In15.Cu] +Name=In15.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In16.Cu] +Name=In16.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In17.Cu] +Name=In17.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In18.Cu] +Name=In18.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In19.Cu] +Name=In19.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In20.Cu] +Name=In20.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In21.Cu] +Name=In21.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In22.Cu] +Name=In22.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In23.Cu] +Name=In23.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In24.Cu] +Name=In24.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In25.Cu] +Name=In25.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In26.Cu] +Name=In26.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In27.Cu] +Name=In27.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In28.Cu] +Name=In28.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In29.Cu] +Name=In29.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.In30.Cu] +Name=In30.Cu +Type=0 +Enabled=0 +[pcbnew/Layer.B.Cu] +Name=B.Cu +Type=0 +Enabled=1 +[pcbnew/Layer.B.Adhes] +Enabled=1 +[pcbnew/Layer.F.Adhes] +Enabled=1 +[pcbnew/Layer.B.Paste] +Enabled=1 +[pcbnew/Layer.F.Paste] +Enabled=1 +[pcbnew/Layer.B.SilkS] +Enabled=1 +[pcbnew/Layer.F.SilkS] +Enabled=1 +[pcbnew/Layer.B.Mask] +Enabled=1 +[pcbnew/Layer.F.Mask] +Enabled=1 +[pcbnew/Layer.Dwgs.User] +Enabled=1 +[pcbnew/Layer.Cmts.User] +Enabled=1 +[pcbnew/Layer.Eco1.User] +Enabled=1 +[pcbnew/Layer.Eco2.User] +Enabled=1 +[pcbnew/Layer.Edge.Cuts] +Enabled=1 +[pcbnew/Layer.Margin] +Enabled=1 +[pcbnew/Layer.B.CrtYd] +Enabled=1 +[pcbnew/Layer.F.CrtYd] +Enabled=1 +[pcbnew/Layer.B.Fab] +Enabled=1 +[pcbnew/Layer.F.Fab] +Enabled=1 +[pcbnew/Layer.Rescue] +Enabled=1 +[pcbnew/Netclasses] +[pcbnew/Netclasses/Default] +Name=Default +Clearance=0.2 +TrackWidth=0.25 +ViaDiameter=0.8 +ViaDrill=0.4 +uViaDiameter=0.3 +uViaDrill=0.1 +dPairWidth=0.2 +dPairGap=0.25 +dPairViaGap=0.25 diff --git a/schem/pic.sch b/schem/pic.sch @@ -0,0 +1,473 @@ +EESchema Schematic File Version 4 +EELAYER 30 0 +EELAYER END +$Descr A4 11693 8268 +encoding utf-8 +Sheet 1 1 +Title "" +Date "" +Rev "" +Comp "" +Comment1 "" +Comment2 "" +Comment3 "" +Comment4 "" +$EndDescr +$Comp +L Device:R_US R1 +U 1 1 61EA1FDB +P 5300 3000 +F 0 "R1" H 5368 3046 50 0000 L CNN +F 1 "10kΩ" H 5368 2955 50 0000 L CNN +F 2 "" V 5340 2990 50 0001 C CNN +F 3 "~" H 5300 3000 50 0001 C CNN + 1 5300 3000 + 0 -1 -1 0 +$EndComp +$Comp +L power:GNDREF #GND0101 +U 1 1 61EB279A +P 5450 2150 +F 0 "#GND0101" H 5538 2113 50 0000 L CNN +F 1 "GNDREF" H 5455 1977 50 0001 C CNN +F 2 "" H 5450 2150 50 0001 C CNN +F 3 "" H 5450 2150 50 0001 C CNN + 1 5450 2150 + -1 0 0 1 +$EndComp +$Comp +L Device:R_US R2 +U 1 1 61ECA8DC +P 4100 5950 +F 0 "R2" H 4168 5996 50 0000 L CNN +F 1 "330Ω" H 4168 5905 50 0000 L CNN +F 2 "" V 4140 5940 50 0001 C CNN +F 3 "~" H 4100 5950 50 0001 C CNN + 1 4100 5950 + 1 0 0 -1 +$EndComp +$Comp +L MCU_Microchip_PIC16:PIC16F877A-IP PIC16F877A-IP1 +U 1 1 61E8B28E +P 6550 4100 +F 0 "PIC16F877A-IP1" H 6550 5589 50 0000 C CNN +F 1 "PIC16F877A-IP" H 6550 5590 50 0001 C CNN +F 2 "" H 6550 4100 50 0001 C CIN +F 3 "http://ww1.microchip.com/downloads/en/DeviceDoc/39582b.pdf" H 6550 4100 50 0001 C CNN + 1 6550 4100 + 1 0 0 -1 +$EndComp +$Comp +L Simulation_SPICE:VDC V1 +U 1 1 61F2BB51 +P 6000 1550 +F 0 "V1" H 6130 1596 50 0001 L CNN +F 1 "5V" H 5870 1550 50 0000 R CNN +F 2 "" H 6000 1550 50 0001 C CNN +F 3 "~" H 6000 1550 50 0001 C CNN +F 4 "Y" H 6000 1550 50 0001 L CNN "Spice_Netlist_Enabled" +F 5 "V" H 6000 1550 50 0001 L CNN "Spice_Primitive" +F 6 "dc(1)" H 6130 1459 50 0001 L CNN "Spice_Model" + 1 6000 1550 + -1 0 0 1 +$EndComp +$Comp +L power:GNDREF #GND0102 +U 1 1 61F5552B +P 6550 6300 +F 0 "#GND0102" H 6638 6263 50 0000 L CNN +F 1 "GNDREF" H 6555 6127 50 0001 C CNN +F 2 "" H 6550 6300 50 0001 C CNN +F 3 "" H 6550 6300 50 0001 C CNN + 1 6550 6300 + 1 0 0 -1 +$EndComp +Wire Wire Line + 5450 3000 5650 3000 +Wire Wire Line + 6000 2450 6550 2450 +Wire Wire Line + 6550 2450 6550 2700 +Wire Wire Line + 5150 3000 4900 3000 +$Comp +L Switch:SW_Push RSTB1 +U 1 1 61FC0519 +P 5150 2500 +F 0 "RSTB1" H 5150 2693 50 0000 C CNN +F 1 "SW_Push" H 5150 2694 50 0001 C CNN +F 2 "" H 5150 2700 50 0001 C CNN +F 3 "~" H 5150 2700 50 0001 C CNN + 1 5150 2500 + 1 0 0 -1 +$EndComp +Wire Wire Line + 4900 2500 4950 2500 +Wire Wire Line + 4900 2500 4900 2650 +Wire Wire Line + 5450 2150 5450 2500 +Wire Wire Line + 4900 2650 5850 2650 +Wire Wire Line + 5850 2650 5850 2450 +Wire Wire Line + 5850 2450 6000 2450 +Connection ~ 4900 2650 +Wire Wire Line + 4900 2650 4900 3000 +Connection ~ 6000 2450 +Wire Wire Line + 6650 2450 6550 2450 +Connection ~ 6550 2450 +$Comp +L Sensor:BME280 BME280 +U 1 1 61E953D6 +P 8750 2600 +F 0 "BME280" H 8321 2646 50 0000 R CNN +F 1 "BME280" H 8321 2555 50 0001 R CNN +F 2 "Package_LGA:Bosch_LGA-8_2.5x2.5mm_P0.65mm_ClockwisePinNumbering" H 10250 2150 50 0001 C CNN +F 3 "https://ae-bst.resource.bosch.com/media/_tech/media/datasheets/BST-BME280-DS002.pdf" H 8750 2400 50 0001 C CNN + 1 8750 2600 + -1 0 0 -1 +$EndComp +Wire Wire Line + 6650 2700 6650 2450 +$Comp +L Display_Character:NHD-0420H1Z LCD1 +U 1 1 61E937A6 +P 4400 5200 +F 0 "LCD1" V 4400 4356 50 0000 R CNN +F 1 "NHD-0420H1Z" H 4400 4220 50 0001 C CNN +F 2 "Display:NHD-0420H1Z" H 4400 4300 50 0001 C CNN +F 3 "http://www.newhavendisplay.com/specs/NHD-0420H1Z-FSW-GBW-33V3.pdf" H 4500 5100 50 0001 C CNN + 1 4400 5200 + 0 1 1 0 +$EndComp +Wire Wire Line + 3600 5200 3550 5200 +Wire Wire Line + 4100 5600 4100 5800 +Wire Wire Line + 4100 6250 4100 6100 +Connection ~ 6000 1950 +Wire Wire Line + 6000 1950 6000 2450 +Wire Wire Line + 6550 5600 6550 5700 +Connection ~ 6550 5700 +Wire Wire Line + 5200 5200 5300 5200 +Connection ~ 4100 6250 +Wire Wire Line + 4200 5600 4200 5700 +Wire Wire Line + 4200 5700 5050 5700 +Wire Wire Line + 4100 6250 5050 6250 +Connection ~ 5050 5700 +Wire Wire Line + 5050 5700 6550 5700 +Connection ~ 5050 6250 +Wire Wire Line + 5050 6250 5300 6250 +Wire Wire Line + 3550 6150 6550 6150 +Wire Wire Line + 3550 5200 3550 6150 +Connection ~ 6550 6150 +Wire Wire Line + 6550 6150 6550 6300 +Wire Wire Line + 6000 1750 6000 1950 +Wire Wire Line + 6550 5700 6550 6150 +Wire Wire Line + 6650 5600 6650 5700 +Wire Wire Line + 6650 5700 6550 5700 +Wire Wire Line + 8650 6150 6550 6150 +Wire Wire Line + 8650 1950 6000 1950 +Wire Wire Line + 7450 4900 7550 4900 +Wire Wire Line + 7550 4900 7550 2500 +Wire Wire Line + 7550 2500 8150 2500 +Wire Wire Line + 7450 5000 7650 5000 +Wire Wire Line + 7650 5000 7650 2700 +Wire Wire Line + 7650 2700 8150 2700 +Wire Wire Line + 7450 5100 7750 5100 +Wire Wire Line + 7750 5100 7750 2300 +Wire Wire Line + 7750 2300 8150 2300 +Wire Wire Line + 8650 3200 8650 3350 +$Comp +L Device:LED LED1 +U 1 1 61E8F822 +P 8400 3950 +F 0 "LED1" H 8393 4075 50 0000 C CNN +F 1 "LED" H 8393 4076 50 0001 C CNN +F 2 "" H 8400 3950 50 0001 C CNN +F 3 "~" H 8400 3950 50 0001 C CNN + 1 8400 3950 + -1 0 0 1 +$EndComp +$Comp +L Device:R_US R3 +U 1 1 61F053CB +P 8000 3950 +F 0 "R3" H 8068 3996 50 0000 L CNN +F 1 "330Ω" H 8068 3905 50 0000 L CNN +F 2 "" V 8040 3940 50 0001 C CNN +F 3 "~" H 8000 3950 50 0001 C CNN + 1 8000 3950 + 0 -1 -1 0 +$EndComp +Wire Wire Line + 8650 2000 8650 1950 +$Comp +L Switch:SW_Push BTN1 +U 1 1 620E2C06 +P 8050 3550 +F 0 "BTN1" H 8050 3743 50 0000 C CNN +F 1 "SW_Push" H 8050 3744 50 0001 C CNN +F 2 "" H 8050 3750 50 0001 C CNN +F 3 "~" H 8050 3750 50 0001 C CNN + 1 8050 3550 + 1 0 0 -1 +$EndComp +Wire Wire Line + 3400 1950 3400 6250 +Wire Wire Line + 5450 2500 5350 2500 +$Comp +L Device:C_Small C1 +U 1 1 61E97CC0 +P 4200 2650 +F 0 "C1" H 4292 2696 50 0000 L CNN +F 1 "22pF" H 4292 2605 50 0000 L CNN +F 2 "" H 4200 2650 50 0001 C CNN +F 3 "~" H 4200 2650 50 0001 C CNN + 1 4200 2650 + 1 0 0 1 +$EndComp +$Comp +L Device:C_Small C2 +U 1 1 61ECA409 +P 4200 3350 +F 0 "C2" H 4292 3396 50 0000 L CNN +F 1 "22pF" H 4292 3305 50 0000 L CNN +F 2 "" H 4200 3350 50 0001 C CNN +F 3 "~" H 4200 3350 50 0001 C CNN + 1 4200 3350 + -1 0 0 1 +$EndComp +$Comp +L Device:Crystal OSC1 +U 1 1 61EB43E4 +P 4200 3000 +F 0 "OSC1" H 4200 3268 50 0000 C CNN +F 1 "16MHz" H 4200 3177 50 0000 C CNN +F 2 "" H 4200 3000 50 0001 C CNN +F 3 "~" H 4200 3000 50 0001 C CNN + 1 4200 3000 + 0 -1 -1 0 +$EndComp +$Comp +L power:GNDREF #GND0103 +U 1 1 61EE8AF0 +P 3800 3000 +F 0 "#GND0103" H 3888 2963 50 0000 L CNN +F 1 "GNDREF" H 3805 2827 50 0001 C CNN +F 2 "" H 3800 3000 50 0001 C CNN +F 3 "" H 3800 3000 50 0001 C CNN + 1 3800 3000 + 0 1 1 0 +$EndComp +Wire Wire Line + 3800 3000 3850 3000 +Wire Wire Line + 3850 3000 3850 2500 +Wire Wire Line + 3850 2500 4200 2500 +Wire Wire Line + 4200 2500 4200 2550 +Wire Wire Line + 4200 3450 4200 3500 +Wire Wire Line + 4200 3500 3850 3500 +Wire Wire Line + 3850 3500 3850 3000 +Connection ~ 3850 3000 +Wire Wire Line + 4200 3150 4200 3250 +Wire Wire Line + 4200 2850 4200 2750 +Wire Wire Line + 3400 1950 6000 1950 +Wire Wire Line + 3400 6250 4100 6250 +Wire Wire Line + 5300 6250 5300 5200 +Wire Wire Line + 8850 3200 8850 3350 +Wire Wire Line + 8850 3350 8650 3350 +Connection ~ 8650 3350 +Wire Wire Line + 8850 2000 8850 1950 +Wire Wire Line + 8850 1950 8650 1950 +Connection ~ 8650 1950 +Wire Wire Line + 5050 6100 5050 6250 +Wire Wire Line + 5200 5950 5200 5300 +Wire Wire Line + 5050 5800 5050 5700 +$Comp +L Device:R_POT_US POT1 +U 1 1 6208C3F4 +P 5050 5950 +F 0 "POT1" H 4983 5996 50 0000 R CNN +F 1 "10kΩ" H 4983 5905 50 0000 R CNN +F 2 "" H 5050 5950 50 0001 C CNN +F 3 "~" H 5050 5950 50 0001 C CNN + 1 5050 5950 + 1 0 0 -1 +$EndComp +Wire Wire Line + 4200 3250 4650 3250 +Wire Wire Line + 4650 3250 4650 3500 +Wire Wire Line + 4650 3500 5650 3500 +Connection ~ 4200 3250 +Wire Wire Line + 4200 2750 4750 2750 +Wire Wire Line + 4750 2750 4750 3300 +Wire Wire Line + 4750 3300 5650 3300 +Connection ~ 4200 2750 +Wire Wire Line + 7450 3700 7850 3700 +Wire Wire Line + 7850 3700 7850 3550 +Wire Wire Line + 8650 3350 8650 3550 +Connection ~ 8650 3550 +Wire Wire Line + 8650 3550 8650 3950 +Wire Wire Line + 7450 3800 7850 3800 +Wire Wire Line + 7850 3800 7850 3950 +Wire Wire Line + 8550 3950 8650 3950 +Connection ~ 8650 3950 +Wire Wire Line + 8650 3950 8650 6150 +Wire Wire Line + 8600 3550 8650 3550 +$Comp +L Device:R_US R4 +U 1 1 62134942 +P 8450 3550 +F 0 "R4" H 8518 3596 50 0000 L CNN +F 1 "10kΩ" H 8518 3505 50 0000 L CNN +F 2 "" V 8490 3540 50 0001 C CNN +F 3 "~" H 8450 3550 50 0001 C CNN + 1 8450 3550 + 0 -1 -1 0 +$EndComp +Wire Wire Line + 8150 3950 8250 3950 +Wire Wire Line + 8250 3550 8300 3550 +Wire Wire Line + 4500 4800 4500 3700 +Wire Wire Line + 4500 3700 5650 3700 +Wire Wire Line + 4400 4800 4400 3800 +Wire Wire Line + 4400 3800 5650 3800 +Wire Wire Line + 4300 4800 4300 3900 +Wire Wire Line + 4300 3900 5650 3900 +Wire Wire Line + 4200 4800 4200 4000 +Wire Wire Line + 4200 4000 5650 4000 +Wire Wire Line + 4100 4800 4100 4100 +Wire Wire Line + 4100 4100 5650 4100 +Wire Wire Line + 4000 4800 4000 4200 +Wire Wire Line + 4000 4200 5650 4200 +Wire Wire Line + 3900 4800 3900 4300 +Wire Wire Line + 3900 4300 5650 4300 +Wire Wire Line + 3800 4800 3800 4400 +Wire Wire Line + 3800 4400 5650 4400 +Wire Wire Line + 5000 4800 5000 4750 +Wire Wire Line + 5000 4750 5400 4750 +Wire Wire Line + 5400 4750 5400 6000 +Wire Wire Line + 5400 6000 8050 6000 +Wire Wire Line + 8050 6000 8050 4600 +Wire Wire Line + 8050 4600 7450 4600 +Wire Wire Line + 4900 4800 4900 4650 +Wire Wire Line + 4900 4650 5500 4650 +Wire Wire Line + 5500 4650 5500 5900 +Wire Wire Line + 5500 5900 7950 5900 +Wire Wire Line + 7950 5900 7950 4700 +Wire Wire Line + 7950 4700 7450 4700 +Wire Wire Line + 4800 4800 4800 4550 +Wire Wire Line + 4800 4550 5600 4550 +Wire Wire Line + 5600 4550 5600 5800 +Wire Wire Line + 5600 5800 7850 5800 +Wire Wire Line + 7850 5800 7850 4800 +Wire Wire Line + 7850 4800 7450 4800 +Entry Bus Bus + 2200 2000 2300 2100 +Entry Bus Bus + 2200 2000 2300 2100 +Entry Bus Bus + 2200 2000 2300 2100 +Entry Bus Bus + 2200 2000 2300 2100 +$EndSCHEMATC diff --git a/schem/pic.sch-bak b/schem/pic.sch-bak @@ -0,0 +1,473 @@ +EESchema Schematic File Version 4 +EELAYER 30 0 +EELAYER END +$Descr A4 11693 8268 +encoding utf-8 +Sheet 1 1 +Title "" +Date "" +Rev "" +Comp "" +Comment1 "" +Comment2 "" +Comment3 "" +Comment4 "" +$EndDescr +$Comp +L Device:R_US R1 +U 1 1 61EA1FDB +P 5300 3000 +F 0 "R1" H 5368 3046 50 0000 L CNN +F 1 "10kΩ" H 5368 2955 50 0000 L CNN +F 2 "" V 5340 2990 50 0001 C CNN +F 3 "~" H 5300 3000 50 0001 C CNN + 1 5300 3000 + 0 -1 -1 0 +$EndComp +$Comp +L power:GNDREF GND +U 1 1 61EB279A +P 5450 2150 +F 0 "GND" H 5538 2113 50 0000 L CNN +F 1 "GNDREF" H 5455 1977 50 0001 C CNN +F 2 "" H 5450 2150 50 0001 C CNN +F 3 "" H 5450 2150 50 0001 C CNN + 1 5450 2150 + -1 0 0 1 +$EndComp +$Comp +L Device:R_US R2 +U 1 1 61ECA8DC +P 4100 5950 +F 0 "R2" H 4168 5996 50 0000 L CNN +F 1 "330Ω" H 4168 5905 50 0000 L CNN +F 2 "" V 4140 5940 50 0001 C CNN +F 3 "~" H 4100 5950 50 0001 C CNN + 1 4100 5950 + 1 0 0 -1 +$EndComp +$Comp +L MCU_Microchip_PIC16:PIC16F877A-IP PIC16F877A-IP1 +U 1 1 61E8B28E +P 6550 4100 +F 0 "PIC16F877A-IP1" H 6550 5589 50 0000 C CNN +F 1 "PIC16F877A-IP" H 6550 5590 50 0001 C CNN +F 2 "" H 6550 4100 50 0001 C CIN +F 3 "http://ww1.microchip.com/downloads/en/DeviceDoc/39582b.pdf" H 6550 4100 50 0001 C CNN + 1 6550 4100 + 1 0 0 -1 +$EndComp +$Comp +L Simulation_SPICE:VDC V1 +U 1 1 61F2BB51 +P 6000 1550 +F 0 "V1" H 6130 1596 50 0001 L CNN +F 1 "5V" H 5870 1550 50 0000 R CNN +F 2 "" H 6000 1550 50 0001 C CNN +F 3 "~" H 6000 1550 50 0001 C CNN +F 4 "Y" H 6000 1550 50 0001 L CNN "Spice_Netlist_Enabled" +F 5 "V" H 6000 1550 50 0001 L CNN "Spice_Primitive" +F 6 "dc(1)" H 6130 1459 50 0001 L CNN "Spice_Model" + 1 6000 1550 + -1 0 0 1 +$EndComp +$Comp +L power:GNDREF GND +U 1 1 61F5552B +P 6550 6300 +F 0 "GND" H 6638 6263 50 0000 L CNN +F 1 "GNDREF" H 6555 6127 50 0001 C CNN +F 2 "" H 6550 6300 50 0001 C CNN +F 3 "" H 6550 6300 50 0001 C CNN + 1 6550 6300 + 1 0 0 -1 +$EndComp +Wire Wire Line + 5450 3000 5650 3000 +Wire Wire Line + 6000 2450 6550 2450 +Wire Wire Line + 6550 2450 6550 2700 +Wire Wire Line + 5150 3000 4900 3000 +$Comp +L Switch:SW_Push RSTB1 +U 1 1 61FC0519 +P 5150 2500 +F 0 "RSTB1" H 5150 2693 50 0000 C CNN +F 1 "SW_Push" H 5150 2694 50 0001 C CNN +F 2 "" H 5150 2700 50 0001 C CNN +F 3 "~" H 5150 2700 50 0001 C CNN + 1 5150 2500 + 1 0 0 -1 +$EndComp +Wire Wire Line + 4900 2500 4950 2500 +Wire Wire Line + 4900 2500 4900 2650 +Wire Wire Line + 5450 2150 5450 2500 +Wire Wire Line + 4900 2650 5850 2650 +Wire Wire Line + 5850 2650 5850 2450 +Wire Wire Line + 5850 2450 6000 2450 +Connection ~ 4900 2650 +Wire Wire Line + 4900 2650 4900 3000 +Connection ~ 6000 2450 +Wire Wire Line + 6650 2450 6550 2450 +Connection ~ 6550 2450 +$Comp +L Sensor:BME280 BME280 +U 1 1 61E953D6 +P 8750 2600 +F 0 "BME280" H 8321 2646 50 0000 R CNN +F 1 "BME280" H 8321 2555 50 0001 R CNN +F 2 "Package_LGA:Bosch_LGA-8_2.5x2.5mm_P0.65mm_ClockwisePinNumbering" H 10250 2150 50 0001 C CNN +F 3 "https://ae-bst.resource.bosch.com/media/_tech/media/datasheets/BST-BME280-DS002.pdf" H 8750 2400 50 0001 C CNN + 1 8750 2600 + -1 0 0 -1 +$EndComp +Wire Wire Line + 6650 2700 6650 2450 +$Comp +L Display_Character:NHD-0420H1Z LCD +U 1 1 61E937A6 +P 4400 5200 +F 0 "LCD" V 4400 4356 50 0000 R CNN +F 1 "NHD-0420H1Z" H 4400 4220 50 0001 C CNN +F 2 "Display:NHD-0420H1Z" H 4400 4300 50 0001 C CNN +F 3 "http://www.newhavendisplay.com/specs/NHD-0420H1Z-FSW-GBW-33V3.pdf" H 4500 5100 50 0001 C CNN + 1 4400 5200 + 0 1 1 0 +$EndComp +Wire Wire Line + 3600 5200 3550 5200 +Wire Wire Line + 4100 5600 4100 5800 +Wire Wire Line + 4100 6250 4100 6100 +Connection ~ 6000 1950 +Wire Wire Line + 6000 1950 6000 2450 +Wire Wire Line + 6550 5600 6550 5700 +Connection ~ 6550 5700 +Wire Wire Line + 5200 5200 5300 5200 +Connection ~ 4100 6250 +Wire Wire Line + 4200 5600 4200 5700 +Wire Wire Line + 4200 5700 5050 5700 +Wire Wire Line + 4100 6250 5050 6250 +Connection ~ 5050 5700 +Wire Wire Line + 5050 5700 6550 5700 +Connection ~ 5050 6250 +Wire Wire Line + 5050 6250 5300 6250 +Wire Wire Line + 3550 6150 6550 6150 +Wire Wire Line + 3550 5200 3550 6150 +Connection ~ 6550 6150 +Wire Wire Line + 6550 6150 6550 6300 +Wire Wire Line + 6000 1750 6000 1950 +Wire Wire Line + 6550 5700 6550 6150 +Wire Wire Line + 6650 5600 6650 5700 +Wire Wire Line + 6650 5700 6550 5700 +Wire Wire Line + 8650 6150 6550 6150 +Wire Wire Line + 8650 1950 6000 1950 +Wire Wire Line + 7450 4900 7550 4900 +Wire Wire Line + 7550 4900 7550 2500 +Wire Wire Line + 7550 2500 8150 2500 +Wire Wire Line + 7450 5000 7650 5000 +Wire Wire Line + 7650 5000 7650 2700 +Wire Wire Line + 7650 2700 8150 2700 +Wire Wire Line + 7450 5100 7750 5100 +Wire Wire Line + 7750 5100 7750 2300 +Wire Wire Line + 7750 2300 8150 2300 +Wire Wire Line + 8650 3200 8650 3350 +$Comp +L Device:LED LED1 +U 1 1 61E8F822 +P 8400 3950 +F 0 "LED1" H 8393 4075 50 0000 C CNN +F 1 "LED" H 8393 4076 50 0001 C CNN +F 2 "" H 8400 3950 50 0001 C CNN +F 3 "~" H 8400 3950 50 0001 C CNN + 1 8400 3950 + -1 0 0 1 +$EndComp +$Comp +L Device:R_US R3 +U 1 1 61F053CB +P 8000 3950 +F 0 "R3" H 8068 3996 50 0000 L CNN +F 1 "330Ω" H 8068 3905 50 0000 L CNN +F 2 "" V 8040 3940 50 0001 C CNN +F 3 "~" H 8000 3950 50 0001 C CNN + 1 8000 3950 + 0 -1 -1 0 +$EndComp +Wire Wire Line + 8650 2000 8650 1950 +$Comp +L Switch:SW_Push BTN1 +U 1 1 620E2C06 +P 8050 3550 +F 0 "BTN1" H 8050 3743 50 0000 C CNN +F 1 "SW_Push" H 8050 3744 50 0001 C CNN +F 2 "" H 8050 3750 50 0001 C CNN +F 3 "~" H 8050 3750 50 0001 C CNN + 1 8050 3550 + 1 0 0 -1 +$EndComp +Wire Wire Line + 3400 1950 3400 6250 +Wire Wire Line + 5450 2500 5350 2500 +$Comp +L Device:C_Small C1 +U 1 1 61E97CC0 +P 4200 2650 +F 0 "C1" H 4292 2696 50 0000 L CNN +F 1 "22pF" H 4292 2605 50 0000 L CNN +F 2 "" H 4200 2650 50 0001 C CNN +F 3 "~" H 4200 2650 50 0001 C CNN + 1 4200 2650 + 1 0 0 1 +$EndComp +$Comp +L Device:C_Small C2 +U 1 1 61ECA409 +P 4200 3350 +F 0 "C2" H 4292 3396 50 0000 L CNN +F 1 "22pF" H 4292 3305 50 0000 L CNN +F 2 "" H 4200 3350 50 0001 C CNN +F 3 "~" H 4200 3350 50 0001 C CNN + 1 4200 3350 + -1 0 0 1 +$EndComp +$Comp +L Device:Crystal OSC1 +U 1 1 61EB43E4 +P 4200 3000 +F 0 "OSC1" H 4200 3268 50 0000 C CNN +F 1 "16MHz" H 4200 3177 50 0000 C CNN +F 2 "" H 4200 3000 50 0001 C CNN +F 3 "~" H 4200 3000 50 0001 C CNN + 1 4200 3000 + 0 -1 -1 0 +$EndComp +$Comp +L power:GNDREF GND +U 1 1 61EE8AF0 +P 3800 3000 +F 0 "GND" H 3888 2963 50 0000 L CNN +F 1 "GNDREF" H 3805 2827 50 0001 C CNN +F 2 "" H 3800 3000 50 0001 C CNN +F 3 "" H 3800 3000 50 0001 C CNN + 1 3800 3000 + 0 1 1 0 +$EndComp +Wire Wire Line + 3800 3000 3850 3000 +Wire Wire Line + 3850 3000 3850 2500 +Wire Wire Line + 3850 2500 4200 2500 +Wire Wire Line + 4200 2500 4200 2550 +Wire Wire Line + 4200 3450 4200 3500 +Wire Wire Line + 4200 3500 3850 3500 +Wire Wire Line + 3850 3500 3850 3000 +Connection ~ 3850 3000 +Wire Wire Line + 4200 3150 4200 3250 +Wire Wire Line + 4200 2850 4200 2750 +Wire Wire Line + 3400 1950 6000 1950 +Wire Wire Line + 3400 6250 4100 6250 +Wire Wire Line + 5300 6250 5300 5200 +Wire Wire Line + 8850 3200 8850 3350 +Wire Wire Line + 8850 3350 8650 3350 +Connection ~ 8650 3350 +Wire Wire Line + 8850 2000 8850 1950 +Wire Wire Line + 8850 1950 8650 1950 +Connection ~ 8650 1950 +Wire Wire Line + 5050 6100 5050 6250 +Wire Wire Line + 5200 5950 5200 5300 +Wire Wire Line + 5050 5800 5050 5700 +$Comp +L Device:R_POT_US POT1 +U 1 1 6208C3F4 +P 5050 5950 +F 0 "POT1" H 4983 5996 50 0000 R CNN +F 1 "10kΩ" H 4983 5905 50 0000 R CNN +F 2 "" H 5050 5950 50 0001 C CNN +F 3 "~" H 5050 5950 50 0001 C CNN + 1 5050 5950 + 1 0 0 -1 +$EndComp +Wire Wire Line + 4200 3250 4650 3250 +Wire Wire Line + 4650 3250 4650 3500 +Wire Wire Line + 4650 3500 5650 3500 +Connection ~ 4200 3250 +Wire Wire Line + 4200 2750 4750 2750 +Wire Wire Line + 4750 2750 4750 3300 +Wire Wire Line + 4750 3300 5650 3300 +Connection ~ 4200 2750 +Wire Wire Line + 7450 3700 7850 3700 +Wire Wire Line + 7850 3700 7850 3550 +Wire Wire Line + 8650 3350 8650 3550 +Connection ~ 8650 3550 +Wire Wire Line + 8650 3550 8650 3950 +Wire Wire Line + 7450 3800 7850 3800 +Wire Wire Line + 7850 3800 7850 3950 +Wire Wire Line + 8550 3950 8650 3950 +Connection ~ 8650 3950 +Wire Wire Line + 8650 3950 8650 6150 +Wire Wire Line + 8600 3550 8650 3550 +$Comp +L Device:R_US R4 +U 1 1 62134942 +P 8450 3550 +F 0 "R4" H 8518 3596 50 0000 L CNN +F 1 "10kΩ" H 8518 3505 50 0000 L CNN +F 2 "" V 8490 3540 50 0001 C CNN +F 3 "~" H 8450 3550 50 0001 C CNN + 1 8450 3550 + 0 -1 -1 0 +$EndComp +Wire Wire Line + 8150 3950 8250 3950 +Wire Wire Line + 8250 3550 8300 3550 +Wire Wire Line + 4500 4800 4500 3700 +Wire Wire Line + 4500 3700 5650 3700 +Wire Wire Line + 4400 4800 4400 3800 +Wire Wire Line + 4400 3800 5650 3800 +Wire Wire Line + 4300 4800 4300 3900 +Wire Wire Line + 4300 3900 5650 3900 +Wire Wire Line + 4200 4800 4200 4000 +Wire Wire Line + 4200 4000 5650 4000 +Wire Wire Line + 4100 4800 4100 4100 +Wire Wire Line + 4100 4100 5650 4100 +Wire Wire Line + 4000 4800 4000 4200 +Wire Wire Line + 4000 4200 5650 4200 +Wire Wire Line + 3900 4800 3900 4300 +Wire Wire Line + 3900 4300 5650 4300 +Wire Wire Line + 3800 4800 3800 4400 +Wire Wire Line + 3800 4400 5650 4400 +Wire Wire Line + 5000 4800 5000 4750 +Wire Wire Line + 5000 4750 5400 4750 +Wire Wire Line + 5400 4750 5400 6000 +Wire Wire Line + 5400 6000 8050 6000 +Wire Wire Line + 8050 6000 8050 4600 +Wire Wire Line + 8050 4600 7450 4600 +Wire Wire Line + 4900 4800 4900 4650 +Wire Wire Line + 4900 4650 5500 4650 +Wire Wire Line + 5500 4650 5500 5900 +Wire Wire Line + 5500 5900 7950 5900 +Wire Wire Line + 7950 5900 7950 4700 +Wire Wire Line + 7950 4700 7450 4700 +Wire Wire Line + 4800 4800 4800 4550 +Wire Wire Line + 4800 4550 5600 4550 +Wire Wire Line + 5600 4550 5600 5800 +Wire Wire Line + 5600 5800 7850 5800 +Wire Wire Line + 7850 5800 7850 4800 +Wire Wire Line + 7850 4800 7450 4800 +Entry Bus Bus + 2200 2000 2300 2100 +Entry Bus Bus + 2200 2000 2300 2100 +Entry Bus Bus + 2200 2000 2300 2100 +Entry Bus Bus + 2200 2000 2300 2100 +$EndSCHEMATC diff --git a/src/Makefile b/src/Makefile @@ -0,0 +1,40 @@ +.POSIX: + +BIN = prog +CC = sdcc +CPPFLAGS = +CFLAGS = --use-non-free -mpic14 -p16f877a ${CPPFLAGS} +PIC = PIC16F877A + +SRC = main.c \ + tmr0.c \ + lcd.c \ + i2c.c \ + bme280.c \ + util.c + +OBJ = ${SRC:.c=.o} + +all: options ${BIN} + +options: + @echo ${BIN} build options: + @echo "CC = ${CC}" + @echo "CFLAGS = ${CFLAGS}" + +${BIN}: ${OBJ} + ${CC} ${OBJ} ${CFLAGS} -o $@ + +.c.o: + ${CC} -c ${CFLAGS} $< + +flash: all + pk2cmd -P ${PIC} -X -M -F ${BIN}.hex + +erase: all + pk2cmd -P ${PIC} -E -F ${BIN}.hex + +clean: + rm -f *.hex *.asm *.cod *.hex *.lst *.o *.core + +.PHONY: all options clean erase flash diff --git a/src/bme280.c b/src/bme280.c @@ -0,0 +1,210 @@ +#include "bme280.h" +#include "i2c.h" +#include "tmr0.h" + +#define MODE_WRITE 0 +#define MODE_READ 1 + +#define BME280_DELAY 100 + +#define BME280_SAMPLE_SKIP 0x00 +#define BME280_SAMPLE_X1 0x01 +#define BME280_FILTER_OFF 0x00 +#define BME280_STANDBY_0_5 0x00 +#define BME280_MODE_NORMAL 0x03 +#define BME280_RESET_POWERON 0xb6 + +#define BME280_ADDR 0xee +#define BME280_CHIPID 0x60 + +#define BME280_REG_DIG_T1 0x88 +#define BME280_REG_DIG_T2 0x8a +#define BME280_REG_DIG_T3 0x8c + +#define BME280_REG_DIG_H1 0xa1 +#define BME280_REG_DIG_H2 0xe1 +#define BME280_REG_DIG_H3 0xe3 +#define BME280_REG_DIG_H4 0xe4 +#define BME280_REG_DIG_H5 0xe5 +#define BME280_REG_DIG_H6 0xe7 + +#define BME280_REG_CHIPID 0xd0 +#define BME280_REG_SOFTRESET 0xe0 + +#define BME280_REG_CTLHUM 0xf2 +#define BME280_REG_STATUS 0xf3 +#define BME280_REG_CTL 0xf4 +#define BME280_REG_CONFIG 0xf5 +#define BME280_REG_PRESS_MSB 0xf7 + +struct bme280_calib { + uint16_t dig_t1; + int16_t dig_t2; + int16_t dig_t3; + /* Pressure fields are not used to preserve space. */ + uint8_t dig_h1; + int16_t dig_h2; + uint8_t dig_h3; + int16_t dig_h4; + int16_t dig_h5; + int8_t dig_h6; +}; + +static void bme280_write(uint8_t, uint8_t); +static uint8_t bme280_read8(uint8_t); +static uint16_t bme280_read16(uint8_t); +static void bme280_update(void); + +static struct bme280_calib cal; +static int32_t adc_t, adc_h, t_fine; + +static void +bme280_write(uint8_t reg, uint8_t dat) +{ + i2c_start(); + i2c_write(BME280_ADDR | MODE_WRITE); + i2c_write(reg); + i2c_write(dat); + i2c_stop(); +} + +static uint8_t +bme280_read8(uint8_t reg) +{ + uint8_t c; + + i2c_start(); + i2c_write(BME280_ADDR | MODE_WRITE); + i2c_write(reg); + i2c_restart(); + i2c_write(BME280_ADDR | MODE_READ); + c = i2c_read(0); + i2c_stop(); + return (c); +} + +static uint16_t +bme280_read16(uint8_t reg) +{ + uint16_t c; + + i2c_start(); + i2c_write(BME280_ADDR | MODE_WRITE); + i2c_write(reg); + i2c_restart(); + i2c_write(BME280_ADDR | MODE_READ); + c = i2c_read(1); + c |= i2c_read(0) << 8; + i2c_stop(); + return (c); +} + +static void +bme280_update(void) +{ + union { + uint8_t a[4]; + uint32_t v; + } r; + + i2c_start(); + i2c_write(BME280_ADDR | MODE_WRITE); + i2c_write(BME280_REG_PRESS_MSB); + i2c_restart(); + i2c_write(BME280_ADDR | MODE_READ); + + /* Ignore pressure */ + (void)i2c_read(1); + (void)i2c_read(1); + (void)i2c_read(1); + + r.a[3] = 0x00; + r.a[2] = i2c_read(1); + r.a[1] = i2c_read(1); + r.a[0] = i2c_read(1); + adc_t = (r.v >> 4) & 0xfffff; + + r.a[2] = 0x00; + r.a[1] = i2c_read(1); + r.a[0] = i2c_read(0); + adc_h = r.v & 0xffff; + + i2c_stop(); +} + +int +bme280_init(void) +{ + if (bme280_read8(BME280_REG_CHIPID) != BME280_CHIPID) + return (-1); + bme280_write(BME280_REG_SOFTRESET, BME280_RESET_POWERON); + tmr0_delay_ms(BME280_DELAY); + while ((bme280_read8(BME280_REG_STATUS) & 0x01) == 0x01) + tmr0_delay_ms(BME280_DELAY); + + cal.dig_t1 = bme280_read16(BME280_REG_DIG_T1); + cal.dig_t2 = bme280_read16(BME280_REG_DIG_T2); + cal.dig_t3 = bme280_read16(BME280_REG_DIG_T3); + + cal.dig_h1 = bme280_read8(BME280_REG_DIG_H1); + cal.dig_h2 = bme280_read16(BME280_REG_DIG_H2); + cal.dig_h3 = bme280_read8(BME280_REG_DIG_H3); + cal.dig_h4 = ((uint16_t)bme280_read8(BME280_REG_DIG_H4) << 4) | + (bme280_read8(BME280_REG_DIG_H4 + 1) & 0x0f); + if (cal.dig_h4 & 0x0800) /* H4 < 0 */ + cal.dig_h4 |= 0xf000; + cal.dig_h5 = ((uint16_t)bme280_read8(BME280_REG_DIG_H5 + 1) << 4) | + (bme280_read8(BME280_REG_DIG_H5) >> 4); + if (cal.dig_h5 & 0x0800) /* H5 < 0 */ + cal.dig_h5 |= 0xf000; + cal.dig_h6 = bme280_read8(BME280_REG_DIG_H6); + + bme280_write(BME280_REG_CTLHUM, BME280_SAMPLE_X1); + bme280_write(BME280_REG_CONFIG, ((BME280_STANDBY_0_5 << 5) | + (BME280_FILTER_OFF << 2)) & 0xfc); + bme280_write(BME280_REG_CTL, ((BME280_SAMPLE_X1 << 5) | + (BME280_SAMPLE_SKIP << 2)) | BME280_MODE_NORMAL); + + tmr0_delay_ms(BME280_DELAY); + + return (0); +} + +/* Black magic taken (stolen) from BME280's datasheet. */ +int32_t +bme280_read_temp(void) +{ + int32_t v1, v2; + + bme280_update(); + v1 = ((((adc_t >> 3) - ((int32_t)cal.dig_t1 << 1))) * + ((int32_t)cal.dig_t2)) >> 11; + v2 = (((((adc_t >> 4) - ((int32_t)cal.dig_t1)) * + ((adc_t >> 4) - ((int32_t)cal.dig_t1))) >> 12) * + ((int32_t)cal.dig_t3)) >> 14; + + t_fine = v1 + v2; + + return ((t_fine * 5 + 128) / 256); +} + +uint32_t +bme280_read_humid(void) +{ + int32_t v = 0; + + bme280_update(); + v = (t_fine - ((int32_t)76800)); + + v = (((((adc_h << 14) - (((int32_t)cal.dig_h4) << 20) - + (((int32_t)cal.dig_h5) * v)) + ((int32_t)16384)) >> 15) * + (((((((v * ((int32_t)cal.dig_h6)) >> 10) * + (((v * ((int32_t)cal.dig_h3)) >> 11) + ((int32_t)32768))) >> 10) + + ((int32_t)2097152)) * ((int32_t)cal.dig_h2) + 8192) >> 14)); + + v = (v - (((((v >> 15) * (v >> 15)) >> 7) * ((int32_t)cal.dig_h1)) >> 4)); + v = (v < 0 ? 0 : v); + v = (v > 419430400 ? 419430400 : v); + + return ((uint32_t)(v >> 12)); +} diff --git a/src/bme280.h b/src/bme280.h @@ -0,0 +1,10 @@ +#ifndef _BME280_H_ +#define _BME280_H_ + +#include <stdint.h> + +int bme280_init(void); +int32_t bme280_read_temp(void); +uint32_t bme280_read_humid(void); + +#endif /* _BME280_H_ */ diff --git a/src/extern.h b/src/extern.h @@ -0,0 +1,25 @@ +#ifndef _EXTERN_H_ +#define _EXTERN_H_ + +#define NO_BIT_DEFINES +#include <pic14regs.h> +#include <stdint.h> + +/* MCU related constants */ +#define _XTAL_FREQ 16000000 /* Crystal oscillator running at 16MHz */ + +#define BTN_PORT PORTBbits.RB0 +#define BTN_TRIS TRISBbits.TRISB0 +#define BTN_DEBOUNCE_TIME_MS 20 + +#define LED_PORT PORTBbits.RB1 +#define LED_TRIS TRISBbits.TRISB1 + +#define OUTPUT 0 +#define INPUT 1 + +/* Non MCU related constants */ +#define NULL ((void *)0) +#define BUFSIZ (3 * sizeof(uint32_t)) + +#endif /* _EXTERN_H_ */ diff --git a/src/i2c.c b/src/i2c.c @@ -0,0 +1,67 @@ +#include "extern.h" +#include "i2c.h" + +#define I2C_SCL TRISCbits.TRISC3 +#define I2C_SDA TRISCbits.TRISC4 + +void +i2c_init(uint8_t mode, uint8_t slew, uint32_t freq) +{ + I2C_SCL = INPUT; + I2C_SDA = INPUT; + SSPCON = mode | 0x20; /* MCU as master */ + SSPCON2 = 0; + SSPADD = (_XTAL_FREQ / (4 * freq)) - 1; /* Bus clock speed */ + SSPSTAT &= 0x3f; + SSPSTAT = slew; +} + +void +i2c_hold(void) +{ + while ((SSPSTATbits.R_W) || (SSPCON2 & 0x1f)) + ; /* nothing */ +} + +void +i2c_start(void) +{ + i2c_hold(); + SSPCON2bits.SEN = 1; +} + +void +i2c_stop(void) +{ + i2c_hold(); + SSPCON2bits.PEN = 1; +} + +void +i2c_restart(void) +{ + i2c_hold(); + SSPCON2bits.RSEN = 1; +} + +void +i2c_write(uint8_t c) +{ + SSPBUF = c; + i2c_hold(); +} + +uint8_t +i2c_read(uint8_t ack) +{ + uint8_t c; + + SSPCON2bits.RCEN = 1; + while (SSPSTATbits.BF == 0) + ; /* nothing */ + c = SSPBUF; + i2c_hold(); + SSPCON2bits.ACKDT = ack ? 0 : 1; + SSPCON2bits.ACKEN = 1; + return (c); +} diff --git a/src/i2c.h b/src/i2c.h @@ -0,0 +1,19 @@ +#ifndef _I2C_H_ +#define _I2C_H_ + +#include <stdint.h> + +#define I2C_MASTER 0x08 +#define I2C_SLEW_OFF 0x80 +#define I2C_SLEW_ON 0x00 +#define I2C_CLK_1MHZ 1000000 + +void i2c_init(uint8_t, uint8_t, uint32_t); +void i2c_hold(void); +void i2c_start(void); +void i2c_stop(void); +void i2c_restart(void); +void i2c_write(uint8_t); +uint8_t i2c_read(uint8_t); + +#endif /* _I2C_H_ */ diff --git a/src/lcd.c b/src/lcd.c @@ -0,0 +1,50 @@ +#include "extern.h" +#include "lcd.h" +#include "tmr0.h" + +#define LCD_RS PORTCbits.RC0 /* Instruction reg: 0, Data reg: 1 */ +#define LCD_RW PORTCbits.RC1 /* Write: 0, Read: 1 */ +#define LCD_EN PORTCbits.RC2 /* Enable read/write */ +#define LCD_RS_TRIS TRISCbits.TRISC0 +#define LCD_RW_TRIS TRISCbits.TRISC1 +#define LCD_EN_TRIS TRISCbits.TRISC2 +#define LCD_PORT_DATA PORTD +#define LCD_TRIS_DATA TRISD + +void +lcd_init(void) +{ + LCD_RS_TRIS = OUTPUT; + LCD_RW_TRIS = OUTPUT; + LCD_EN_TRIS = OUTPUT; + LCD_PORT_DATA = OUTPUT; + LCD_TRIS_DATA = OUTPUT; + LCD_RS = 0; + LCD_RW = 0; + LCD_EN = 0; + + lcd_cmd(LCD_MODE); + tmr0_delay_ms(LCD_DELAY_STARTUP); + lcd_cmd(LCD_CURS_ROW1); + lcd_cmd(LCD_CURS_OFF); + lcd_cmd(LCD_CURS_INC); + lcd_cmd(LCD_CLEAR); +} + +void +lcd_data(uint8_t c, uint8_t rs) +{ + LCD_RS = rs; + LCD_RW = 0; + LCD_PORT_DATA = c; + LCD_EN = 1; + tmr0_delay_ms(LCD_DELAY_CMD); + LCD_EN = 0; +} + +void +lcd_puts(const char *str) +{ + while (*str != '\0') + lcd_putc(*str++); +} diff --git a/src/lcd.h b/src/lcd.h @@ -0,0 +1,26 @@ +#ifndef _LCD_H_ +#define _LCD_H_ + +#include <stdint.h> + +#define LCD_DELAY_STARTUP 15 +#define LCD_DELAY_CMD 2 +#define LCD_SEL_INST 0 /* Instruction register for RS */ +#define LCD_SEL_DATA 1 /* Data register for RS */ +#define LCD_CLEAR 0x01 /* Clear screen */ +#define LCD_CURS_ROW1 0x02 /* Set cursor on (0, 0) */ +#define LCD_CURS_ROW2 0xc0 /* Set cursor on (1, 0) */ +#define LCD_CURS_INC 0x06 /* Auto-increment cursor */ +#define LCD_CURS_OFF 0x0c /* Hide cursor */ +#define LCD_MODE 0x38 /* 8-bit, 16x2 */ +//TODO: backlight + +/* Function macros */ +#define lcd_putc(c) lcd_data(c, LCD_SEL_DATA) +#define lcd_cmd(cmd) lcd_data(cmd, LCD_SEL_INST) + +void lcd_init(void); +void lcd_data(uint8_t, uint8_t); +void lcd_puts(const char *); + +#endif /* _LCD_H_ */ diff --git a/src/main.c b/src/main.c @@ -0,0 +1,137 @@ +#include "extern.h" +#include "bme280.h" +#include "i2c.h" +#include "lcd.h" +#include "tmr0.h" +#include "util.h" + +static __code uint16_t __at (_CONFIG) __configword = + _FOSC_HS & _WDTE_OFF & _PWRTE_ON & _LVP_OFF & _WRT_OFF & _BOREN_ON & + _CPD_OFF & _CP_OFF; + +/* + * TODO: turn off unneeded modules (e.g tmr1..) to minimize consumption. + */ + +static void ctx_main(void); +static void ctx_uptime_maxtp(void); +static void print_tp(int32_t); +static void led_blink(void); +static void button_debounce(void); + +static uint32_t timecnt = 0; /* Seconds passed since start */ +static int f_ctx = 0; /* Change context */ +static uint32_t humid; /* Current humidity */ +static int32_t tp; /* Current temperature */ +static int32_t maxtp = -99999; /* Max temperature */ +static char buf[BUFSIZ+1] = {0}; /* Generic buffer */ + +#define LCD_PUTS_INT(buf, v) do { \ + memset(buf, 0, sizeof(buf)); \ + lcd_puts(itoa(&buf[sizeof(buf)-1], v)); \ +} while (0) + +static void +ctx_main(void) +{ + /*lcd_cmd(LCD_CURS_ROW1);*/ + /*lcd_puts("ID: 19390133");*/ + + lcd_cmd(LCD_CURS_ROW1); + lcd_puts("Temp: "); + print_tp(tp); + + lcd_cmd(LCD_CURS_ROW2); + lcd_puts("Humid: "); + LCD_PUTS_INT(buf, humid / 1024); + lcd_putc('.'); + LCD_PUTS_INT(buf, ((humid * 100) / 1024) % 100); + lcd_putc('%'); +} + +static void +ctx_uptime_maxtp(void) +{ + lcd_cmd(LCD_CURS_ROW1); + lcd_puts("T: "); + LCD_PUTS_INT(buf, timecnt); + + lcd_cmd(LCD_CURS_ROW2); + lcd_puts("Max: "); + print_tp(maxtp); +} + +static void +print_tp(int32_t tp) +{ + if (tp < 0) { + tp = -tp; + lcd_putc('-'); + } + LCD_PUTS_INT(buf, tp / 100); + lcd_putc('.'); + LCD_PUTS_INT(buf, tp % 100); + lcd_puts("\337C "); +} + +#undef LCD_PUTS_INT + +static void +led_blink(void) +{ + LED_PORT ^= 1; + /* + * Increment here since this function is called every 1 sec. + * No need to create another timer callback. + */ + timecnt++; +} + +static void +button_debounce(void) +{ + static uint8_t cnt = 0; + + /* Button is pressed */ + if (BTN_PORT == 0) { + if (cnt == 0) { + /* Actual button functionality goes here. */ + f_ctx = 1; + cnt++; + } + cnt = BTN_DEBOUNCE_TIME_MS; + } else if (cnt != 0) { + f_ctx = 0; + cnt--; + } +} + +void +main(void) +{ + tmr0_init(); + tmr0_set_event(&led_blink, 1000); + tmr0_set_event(&button_debounce, 1); + lcd_init(); + i2c_init(I2C_MASTER, I2C_SLEW_OFF, I2C_CLK_1MHZ); + if (bme280_init() < 0) { + lcd_puts("BME280 error"); + for (;;); /* Hang */ + } + + BTN_TRIS = INPUT; + LED_PORT = 1; /* LED on */ + LED_TRIS = OUTPUT; + + for (;;) { + if ((tp = bme280_read_temp()) > maxtp) + maxtp = tp; + humid = bme280_read_humid(); + lcd_cmd(LCD_CLEAR); + if (!f_ctx) + ctx_main(); + else + ctx_uptime_maxtp(); + tmr0_delay_ms(1000); + } +} diff --git a/src/tmr0.c b/src/tmr0.c @@ -0,0 +1,76 @@ +#include "tmr0.h" +#include "util.h" + +#define TMR0_REQ_MAX 2 + +struct timer_req { + ev_handler handler; /* ISR callback */ + uint16_t rate; /* Interval */ + uint16_t cnt; /* Current time */ +}; + +static void tmr0_isr(void) __interrupt; + +static struct timer_req reqs[TMR0_REQ_MAX]; + +static void +tmr0_isr(void) __interrupt +{ + struct timer_req *r; + uint8_t i; + + if (INTCONbits.TMR0IF != 1) + return; + for (i = 0; i < TMR0_REQ_MAX; i++) { + r = &reqs[i]; + if (r->handler == NULL) + continue; + if (++r->cnt == r->rate) { + r->handler(); + r->cnt = 0; + } + } + TMR0 = TMR0_DELAY; + INTCONbits.TMR0IF = 0; /* Clear interrupt flags */ +} + +void +tmr0_init(void) +{ + memset(reqs, 0, sizeof(reqs)); + OPTION_REG = 0; + OPTION_REG |= TMR0_CLK0 | TMR0_PRESCALAR_256; + TMR0 = TMR0_DELAY; + INTCONbits.TMR0IE = 1; /* TMR0 Interrupt Enable */ + INTCONbits.GIE = 1; /* Global Interrupt Enable */ + INTCONbits.PEIE = 1; /* Peripheral Interrupt Enable */ +} + +void +tmr0_delay_ms(uint16_t t) +{ + while (t--) { + while (INTCONbits.TMR0IF == 0) + ; /* nothing */ + INTCONbits.TMR0IF = 0; + TMR0 = TMR0_DELAY; + } +} + +int +tmr0_set_event(ev_handler handler, uint16_t rate) +{ + struct timer_req *r; + uint8_t i; + + for (i = 0; i < TMR0_REQ_MAX; i++) { + r = &reqs[i]; + if (r->handler != NULL) + continue; + r->handler = handler; + r->rate = rate; + r->cnt = 0; + return (1); + } + return (0); +} diff --git a/src/tmr0.h b/src/tmr0.h @@ -0,0 +1,30 @@ +#ifndef _TMR0_H_ +#define _TMR0_H_ + +#include "extern.h" + +#define TMR0_CLK0 (0 << 5) /* Use the CLK0 pin */ +/* + * Bit 3 assigns the prescalar to TMR0. + * Bits 0-2 of OPTION_REG indicate the prescalar value. In this case, + * 111 indicates a prescalar value of 256. + */ +#define TMR0_PRESCALAR_256 0b0111 +/* + * We want 1ms delay @ 16Mhz with 64 prescalar, the formula is: + * + * 256 - ((delay * (fosc / 1000)) / (prescalar * 4)) = + * 256 - ((1 * (16000000 / 1000)) / (256 * 4)) = + * 256 - ((1 * 16000) / (256 * 4)) = ~240 + * + * sdcc thinks there's an overflow here (hint: he's wrong)... + */ +#define TMR0_DELAY (256 - ((1 * (_XTAL_FREQ / 1000)) / (256 * 4))) + +typedef void (*ev_handler)(void); + +void tmr0_init(void); +void tmr0_delay_ms(uint16_t); +int tmr0_set_event(ev_handler, uint16_t); + +#endif /* _TMR0_H_ */ diff --git a/src/util.c b/src/util.c @@ -0,0 +1,27 @@ +#include "util.h" + +/* + * To avoid reversing the string, the caller has to provide a pointer to the + * end of the string. + */ +char * +itoa(char *s, int n) +{ + *s = '\0'; + if (n == 0) + *--s = '0'; + for (; n; n /= 10) + *--s = n % 10 + '0'; + return (s); +} + +void * +memset(void *dst, int v, int len) +{ + unsigned char *dst0; + + dst0 = dst; + while (len--) + *dst0++ = v; + return (dst); +} diff --git a/src/util.h b/src/util.h @@ -0,0 +1,7 @@ +#ifndef _UTIL_H_ +#define _UTIL_H_ + +char *itoa(char *, int); +void *memset(void *, int, int); + +#endif /* _UTIL_H_ */