uni

commit b34bb297544ccf88682cf951526e59ac7470e770
parent bc6cbf59b727923f884167b262002bdce3d852f4
Author: Christos Margiolis <christos@margiolis.net>
Date:   Sat, 22 Jan 2022 00:01:40 +0200

finally something interesting

Diffstat:
A
c_embedded/schem/fp-info-cache
 | 
1
+
A
c_embedded/schem/layout.kicad_wks
 | 
18
++++++++++++++++++
A
c_embedded/schem/pic-cache.lib
 | 
277
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
A
c_embedded/schem/pic.kicad_pcb
 | 
1
+
A
c_embedded/schem/pic.pro
 | 
43
+++++++++++++++++++++++++++++++++++++++++++
A
c_embedded/schem/pic.sch
 | 
367
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
A
c_embedded/schem/pic.sch-bak
 | 
367
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
A
c_embedded/schem/schem.pdf
 | 
0

A
c_embedded/src/Makefile
 | 
7
+++++++
A
c_embedded/src/main.c
 | 
33
+++++++++++++++++++++++++++++++++

10 files changed, 1114 insertions(+), 0 deletions(-)
diff --git a/c_embedded/schem/fp-info-cache b/c_embedded/schem/fp-info-cache
@@ -0,0 +1 @@
+0
diff --git a/c_embedded/schem/layout.kicad_wks b/c_embedded/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/c_embedded/schem/pic-cache.lib b/c_embedded/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/c_embedded/schem/pic.kicad_pcb b/c_embedded/schem/pic.kicad_pcb
@@ -0,0 +1 @@
+(kicad_pcb (version 4) (host kicad "dummy file") )
diff --git a/c_embedded/schem/pic.pro b/c_embedded/schem/pic.pro
@@ -0,0 +1,43 @@
+update=Fri Jan 21 13:58:09 2022
+version=1
+last_client=kicad
+[general]
+version=1
+RootSch=
+BoardNm=
+[pcbnew]
+version=1
+LastNetListRead=
+UseCmpFile=1
+PadDrill=0.600000000000
+PadDrillOvalY=0.600000000000
+PadSizeH=1.500000000000
+PadSizeV=1.500000000000
+PcbTextSizeV=1.500000000000
+PcbTextSizeH=1.500000000000
+PcbTextThickness=0.300000000000
+ModuleTextSizeV=1.000000000000
+ModuleTextSizeH=1.000000000000
+ModuleTextSizeThickness=0.150000000000
+SolderMaskClearance=0.000000000000
+SolderMaskMinWidth=0.000000000000
+DrawSegmentWidth=0.200000000000
+BoardOutlineThickness=0.100000000000
+ModuleOutlineThickness=0.150000000000
+[cvpcb]
+version=1
+NetIExt=net
+[eeschema]
+version=1
+LibDir=
+[eeschema/libraries]
+[schematic_editor]
+version=1
+PageLayoutDescrFile=layout.kicad_wks
+PlotDirectoryName=/home/christos/
+SubpartIdSeparator=0
+SubpartFirstId=65
+NetFmtName=
+SpiceAjustPassiveValues=0
+LabSize=50
+ERC_TestSimilarLabels=1
diff --git a/c_embedded/schem/pic.sch b/c_embedded/schem/pic.sch
@@ -0,0 +1,367 @@
+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
+$Comp
+L Device:LED LED1
+U 1 1 61E8F822
+P 9350 5200
+F 0 "LED1" H 9343 5325 50  0000 C CNN
+F 1 "LED" H 9343 5326 50  0001 C CNN
+F 2 "" H 9350 5200 50  0001 C CNN
+F 3 "~" H 9350 5200 50  0001 C CNN
+	1    9350 5200
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:R_US R1
+U 1 1 61EA1FDB
+P 5300 3000
+F 0 "R1" H 5368 3046 50  0000 L CNN
+F 1 "10kΩ" H 5368 2955 50  0000 L CNN
+F 2 "" V 5340 2990 50  0001 C CNN
+F 3 "~" H 5300 3000 50  0001 C CNN
+	1    5300 3000
+	0    -1   -1   0   
+$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
+$Comp
+L Device:C_Small C1
+U 1 1 61E97CC0
+P 4100 3750
+F 0 "C1" H 4192 3796 50  0000 L CNN
+F 1 "22pF" H 4192 3705 50  0000 L CNN
+F 2 "" H 4100 3750 50  0001 C CNN
+F 3 "~" H 4100 3750 50  0001 C CNN
+	1    4100 3750
+	-1   0    0    -1  
+$EndComp
+$Comp
+L power:GNDREF GND
+U 1 1 61EE8AF0
+P 4300 3900
+F 0 "GND" H 4388 3863 50  0000 L CNN
+F 1 "GNDREF" H 4305 3727 50  0001 C CNN
+F 2 "" H 4300 3900 50  0001 C CNN
+F 3 "" H 4300 3900 50  0001 C CNN
+	1    4300 3900
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:C_Small C2
+U 1 1 61ECA409
+P 4500 3750
+F 0 "C2" H 4592 3796 50  0000 L CNN
+F 1 "22pF" H 4592 3705 50  0000 L CNN
+F 2 "" H 4500 3750 50  0001 C CNN
+F 3 "~" H 4500 3750 50  0001 C CNN
+	1    4500 3750
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:Crystal OSC1
+U 1 1 61EB43E4
+P 4300 3550
+F 0 "OSC1" H 4300 3818 50  0000 C CNN
+F 1 "8MHz" H 4300 3727 50  0000 C CNN
+F 2 "" H 4300 3550 50  0001 C CNN
+F 3 "~" H 4300 3550 50  0001 C CNN
+	1    4300 3550
+	1    0    0    -1  
+$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
+Wire Wire Line
+	4100 3300 4100 3550
+Wire Wire Line
+	4150 3550 4100 3550
+Connection ~ 4100 3550
+Wire Wire Line
+	4100 3550 4100 3650
+Wire Wire Line
+	4500 3500 4500 3550
+Wire Wire Line
+	4450 3550 4500 3550
+Connection ~ 4500 3550
+Wire Wire Line
+	4500 3550 4500 3650
+Wire Wire Line
+	4300 3900 4100 3900
+Wire Wire Line
+	4100 3900 4100 3850
+Wire Wire Line
+	4300 3900 4500 3900
+Wire Wire Line
+	4500 3900 4500 3850
+Connection ~ 4300 3900
+$Comp
+L Simulation_SPICE:VDC V1
+U 1 1 61F2BB51
+P 6000 1550
+F 0 "V1" H 6130 1596 50  0001 L CNN
+F 1 "5V" H 5870 1550 50  0000 R CNN
+F 2 "" H 6000 1550 50  0001 C CNN
+F 3 "~" H 6000 1550 50  0001 C CNN
+F 4 "Y" H 6000 1550 50  0001 L CNN "Spice_Netlist_Enabled"
+F 5 "V" H 6000 1550 50  0001 L CNN "Spice_Primitive"
+F 6 "dc(1)" H 6130 1459 50  0001 L CNN "Spice_Model"
+	1    6000 1550
+	-1   0    0    1   
+$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
+	5450 2500 5350 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
+$Comp
+L Sensor:BME280 BME280
+U 1 1 61E953D6
+P 8600 3250
+F 0 "BME280" H 8171 3296 50  0000 R CNN
+F 1 "BME280" H 8171 3205 50  0001 R CNN
+F 2 "Package_LGA:Bosch_LGA-8_2.5x2.5mm_P0.65mm_ClockwisePinNumbering" H 10100 2800 50  0001 C CNN
+F 3 "https://ae-bst.resource.bosch.com/media/_tech/media/datasheets/BST-BME280-DS002.pdf" H 8600 3050 50  0001 C CNN
+	1    8600 3250
+	-1   0    0    -1  
+$EndComp
+Wire Wire Line
+	8000 3150 7800 3150
+Wire Wire Line
+	7800 3150 7800 4900
+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
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Connection ~ 6550 5700
+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+$Comp
+L Device:R_POT_US POT1
+U 1 1 6208C3F4
+P 5050 5950
+F 0 "POT1" H 4983 5996 50  0000 R CNN
+F 1 "10kΩ" H 4983 5905 50  0000 R CNN
+F 2 "" H 5050 5950 50  0001 C CNN
+F 3 "~" H 5050 5950 50  0001 C CNN
+	1    5050 5950
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+$EndComp
+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+$Comp
+L Switch:SW_Push BTN1
+U 1 1 620E2C06
+P 9800 5200
+F 0 "BTN1" H 9800 5393 50  0000 C CNN
+F 1 "SW_Push" H 9800 5394 50  0001 C CNN
+F 2 "" H 9800 5400 50  0001 C CNN
+F 3 "~" H 9800 5400 50  0001 C CNN
+	1    9800 5200
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+$EndSCHEMATC
diff --git a/c_embedded/schem/pic.sch-bak b/c_embedded/schem/pic.sch-bak
@@ -0,0 +1,367 @@
+EESchema Schematic File Version 4
+EELAYER 30 0
+EELAYER END
+$Descr A4 11693 8268
+encoding utf-8
+Sheet 1 1
+Title ""
+Date ""
+Rev ""
+Comp ""
+Comment1 ""
+Comment2 ""
+Comment3 ""
+Comment4 ""
+$EndDescr
+$Comp
+L Device:LED LED
+U 1 1 61E8F822
+P 8100 4650
+F 0 "LED" H 8093 4775 50  0000 C CNN
+F 1 "LED" H 8093 4776 50  0001 C CNN
+F 2 "" H 8100 4650 50  0001 C CNN
+F 3 "~" H 8100 4650 50  0001 C CNN
+	1    8100 4650
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:R_US R1
+U 1 1 61EA1FDB
+P 4050 2450
+F 0 "R1" H 4118 2496 50  0000 L CNN
+F 1 "10kΩ" H 4118 2405 50  0000 L CNN
+F 2 "" V 4090 2440 50  0001 C CNN
+F 3 "~" H 4050 2450 50  0001 C CNN
+	1    4050 2450
+	0    -1   -1   0   
+$EndComp
+$Comp
+L power:GNDREF GND
+U 1 1 61EB279A
+P 4200 1600
+F 0 "GND" H 4288 1563 50  0000 L CNN
+F 1 "GNDREF" H 4205 1427 50  0001 C CNN
+F 2 "" H 4200 1600 50  0001 C CNN
+F 3 "" H 4200 1600 50  0001 C CNN
+	1    4200 1600
+	-1   0    0    1   
+$EndComp
+$Comp
+L Device:R_US R2
+U 1 1 61ECA8DC
+P 2850 5400
+F 0 "R2" H 2918 5446 50  0000 L CNN
+F 1 "330Ω" H 2918 5355 50  0000 L CNN
+F 2 "" V 2890 5390 50  0001 C CNN
+F 3 "~" H 2850 5400 50  0001 C CNN
+	1    2850 5400
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:C_Small C1
+U 1 1 61E97CC0
+P 2850 3200
+F 0 "C1" H 2942 3246 50  0000 L CNN
+F 1 "22pF" H 2942 3155 50  0000 L CNN
+F 2 "" H 2850 3200 50  0001 C CNN
+F 3 "~" H 2850 3200 50  0001 C CNN
+	1    2850 3200
+	-1   0    0    -1  
+$EndComp
+$Comp
+L power:GNDREF GND
+U 1 1 61EE8AF0
+P 3050 3350
+F 0 "GND" H 3138 3313 50  0000 L CNN
+F 1 "GNDREF" H 3055 3177 50  0001 C CNN
+F 2 "" H 3050 3350 50  0001 C CNN
+F 3 "" H 3050 3350 50  0001 C CNN
+	1    3050 3350
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:C_Small C2
+U 1 1 61ECA409
+P 3250 3200
+F 0 "C2" H 3342 3246 50  0000 L CNN
+F 1 "22pF" H 3342 3155 50  0000 L CNN
+F 2 "" H 3250 3200 50  0001 C CNN
+F 3 "~" H 3250 3200 50  0001 C CNN
+	1    3250 3200
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:Crystal OSC
+U 1 1 61EB43E4
+P 3050 3000
+F 0 "OSC" H 3050 3268 50  0000 C CNN
+F 1 "8MHz" H 3050 3177 50  0000 C CNN
+F 2 "" H 3050 3000 50  0001 C CNN
+F 3 "~" H 3050 3000 50  0001 C CNN
+	1    3050 3000
+	1    0    0    -1  
+$EndComp
+$Comp
+L MCU_Microchip_PIC16:PIC16F877A-IP PIC16F877A-IP
+U 1 1 61E8B28E
+P 5300 3550
+F 0 "PIC16F877A-IP" H 5300 5039 50  0000 C CNN
+F 1 "PIC16F877A-IP" H 5300 5040 50  0001 C CNN
+F 2 "" H 5300 3550 50  0001 C CIN
+F 3 "http://ww1.microchip.com/downloads/en/DeviceDoc/39582b.pdf" H 5300 3550 50  0001 C CNN
+	1    5300 3550
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
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+Wire Wire Line
+	2900 3000 2850 3000
+Connection ~ 2850 3000
+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Connection ~ 3250 3000
+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+$Comp
+L Simulation_SPICE:VDC V
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+P 4750 1000
+F 0 "V" H 4880 1046 50  0001 L CNN
+F 1 "5V" H 4620 1000 50  0000 R CNN
+F 2 "" H 4750 1000 50  0001 C CNN
+F 3 "~" H 4750 1000 50  0001 C CNN
+F 4 "Y" H 4750 1000 50  0001 L CNN "Spice_Netlist_Enabled"
+F 5 "V" H 4750 1000 50  0001 L CNN "Spice_Primitive"
+F 6 "dc(1)" H 4880 909 50  0001 L CNN "Spice_Model"
+	1    4750 1000
+	-1   0    0    1   
+$EndComp
+$Comp
+L power:GNDREF GND?
+U 1 1 61F5552B
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+F 0 "GND?" H 5388 5713 50  0000 L CNN
+F 1 "GNDREF" H 5305 5577 50  0001 C CNN
+F 2 "" H 5300 5750 50  0001 C CNN
+F 3 "" H 5300 5750 50  0001 C CNN
+	1    5300 5750
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+$Comp
+L Switch:SW_Push RSTB
+U 1 1 61FC0519
+P 3900 1950
+F 0 "RSTB" H 3900 2143 50  0000 C CNN
+F 1 "SW_Push" H 3900 2144 50  0001 C CNN
+F 2 "" H 3900 2150 50  0001 C CNN
+F 3 "~" H 3900 2150 50  0001 C CNN
+	1    3900 1950
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Connection ~ 4750 1900
+Wire Wire Line
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+Connection ~ 5300 1900
+$Comp
+L Sensor:BME280 BME280
+U 1 1 61E953D6
+P 7350 2700
+F 0 "BME280" H 6921 2746 50  0000 R CNN
+F 1 "BME280" H 6921 2655 50  0001 R CNN
+F 2 "Package_LGA:Bosch_LGA-8_2.5x2.5mm_P0.65mm_ClockwisePinNumbering" H 8850 2250 50  0001 C CNN
+F 3 "https://ae-bst.resource.bosch.com/media/_tech/media/datasheets/BST-BME280-DS002.pdf" H 7350 2500 50  0001 C CNN
+	1    7350 2700
+	-1   0    0    -1  
+$EndComp
+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+$Comp
+L Display_Character:NHD-0420H1Z LCD
+U 1 1 61E937A6
+P 3150 4650
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+F 1 "NHD-0420H1Z" H 3150 3670 50  0001 C CNN
+F 2 "Display:NHD-0420H1Z" H 3150 3750 50  0001 C CNN
+F 3 "http://www.newhavendisplay.com/specs/NHD-0420H1Z-FSW-GBW-33V3.pdf" H 3250 4550 50  0001 C CNN
+	1    3150 4650
+	0    1    1    0   
+$EndComp
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+$Comp
+L Device:R_POT_US POT
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+F 2 "" H 3800 5400 50  0001 C CNN
+F 3 "~" H 3800 5400 50  0001 C CNN
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+$Comp
+L Switch:SW_Push BTN
+U 1 1 620E2C06
+P 8550 4650
+F 0 "BTN" H 8550 4843 50  0000 C CNN
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+F 2 "" H 8550 4850 50  0001 C CNN
+F 3 "~" H 8550 4850 50  0001 C CNN
+	1    8550 4650
+	1    0    0    -1  
+$EndComp
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+$EndSCHEMATC
diff --git a/c_embedded/schem/schem.pdf b/c_embedded/schem/schem.pdf
Binary files differ.
diff --git a/c_embedded/src/Makefile b/c_embedded/src/Makefile
@@ -0,0 +1,7 @@
+all:
+	sdcc --use-non-free -mpic14 -p16f877a main.c
+	pk2cmd -P PIC16F877A -E
+	pk2cmd -P PIC16F877A -X -M -F main.hex
+
+clean:
+	rm -f *.asm *.cod *.hex *.lst *.o
diff --git a/c_embedded/src/main.c b/c_embedded/src/main.c
@@ -0,0 +1,33 @@
+#define NO_BIT_DEFINES
+#include <pic14regs.h>
+#include <stdint.h> 
+
+static __code uint16_t __at (_CONFIG) __configword =
+    _FOSC_HS & _WDTE_OFF & _LVP_OFF & _WRT_OFF & _BOREN_OFF;
+
+#define LED_PORT PORTBbits.RB0
+#define LED_TRIS TRISBbits.TRISB0
+
+#define _XTAL_FREQ 16000000
+
+void
+delay(uint16_t iter)
+{
+	uint16_t i;
+
+	for (i = 0; i < iter; i++)
+		__asm nop __endasm;
+}
+
+void main(void)
+{
+	LED_TRIS = 0; /* Pin as output */
+	LED_PORT = 0; /* LED off */
+	
+	while (1) {
+		LED_PORT = 1; /* LED on */
+		delay(30000); /* ~500ms @ 4MHz */
+		LED_PORT = 0; /* LED off */
+		delay(30000);
+	}
+}