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oled-SH1106-rpi0
kopia lustrzana https://github.com/dettus/oledtest
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added a keytest.

main
Thomas Dettbarn 2022-01-18 19:16:09 +00:00
rodzic 967252403c
commit dfd4f807ac
4 zmienionych plików z 401 dodań i 7 usunięć
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3
README.md
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@ -21,6 +21,7 @@ Really really sorry, this is what happens when you become a maker.
Once you changed one of the #if 0 to #if 1, you can compile it with
gcc -O3 -o oledtest.app oledtest.c
gcc -O3 -o keytest.app keytest.c
IF YOU HAVE A NEW BOARD, PLEASE DO NOT HESITATE TO SEND ME THE MAPPING.
dettus@dettus.net, make sure to include "OLEDTEST" somewhere in the subject line.
@ -30,5 +31,7 @@ Just run sudo ./oledtest.app and watch the display. It should show you two alter
If it complains about a GPIO pin -1, your sysfs mapping does not work with the OLED hat.
Then you have to do some rewiring. You need to find 7 GPIO pins which are free.
Or run sudo ./keytest.app and press the buttons.

3
build.sh
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@ -17,4 +17,5 @@
#SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
gcc -O3 -o oledtest.app oledtest.c
ls -l oledtest.app
gcc -O3 -o keytest.app keytest.c
ls -l oledtest.app keytest.app

351
keytest.c 100644
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@ -0,0 +1,351 @@
/*
MIT No Attribution
Copyright 2022 Thomas Dettbarn (dettus@dettus.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.
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.
*/
#include <stdlib.h>
#include <signal.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <fcntl.h>
#define RETVAL_OK 0
#define RETVAL_NOK -1
#define GPIO_INPUT 0
#define GPIO_OUTPUT 1
#define MAXBUFLEN 64
#define DELAY_US(us) usleep((us));
#define DELAY_MS(ms) usleep((ms)*1000);
#define SPI_MODE0 0
#define SPI_MODE1 1
#define SPI_MODE2 2
#define SPI_MODE3 3
#define SPI_LSBFIRST 0
#define SPI_MSBFIRST 1
#define SPI_DELAY //DELAY_US(1)
#define BITMAP_HEIGHT 64
#define BITMAP_WIDTH 128
//// depends on the development board
// the way I understand this is, that the physical pins are mapped into
// the system memory. to accces those, there is some sort of memory
// offset maybe
#if 0
#warning "This mapping is for the Jetson Nano board."
// Jetson Nano
// source: https://maker.pro/nvidia-jetson/tutorial/how-to-use-gpio-pins-on-jetson-nano-developer-kit
const short physicalmapping[41]={
0, // placeholder. there is no PIN0
-1, -1,// PIN1 =3.3V DC, PIN2 =5V DC
-1, -1,
-1, -1,
216, -1, //PIN7 = AUDIO_MCLK
-1, -1,
50, 79, //PIN11=UART_2_RTS,PIN12=I2S_4_CLK
14, -1,
194,232,
-1, 15,
16, -1,
17, 13,
18, 19,
-1, 20,
-1, -1,
149, -1,
200,168,
38, -1,
76, 51,
12, 77,
-1, 78
};
#elif 0
#warning "This mapping is for the Banana Pi board."
// source: https://wiki.fw-web.de/doku.php?id=en:bpi-r64:gpio
const short physicalmapping[41]={
0, // placeholder. there is no PIN0
-1, -1,// PIN1 =3.3V DC, PIN2 =5V DC
56, -1,// 3,4
55, -1,// 5,6
101, 59, //PIN7 = PWM7,8
-1, 60,// 9,10
51, -1, //PIN11=UART_2_RTS,PIN12=I2S_4_CLK
52, -1, //13,14
98, 61, //15,16
-1, 62, //17,18
68, -1, //19,20
69, 63, //21,22
67, 70, //23,24
-1, 66, //25,26
58, 57, //27,28
85, -1, //29,30
82, 64, //31,32
-1, -1, //33,34
-1, 65, //35,36
86, -1, //37,38
-1, -1 //39,40
};
#elif 1
#warning "This mapping is for the Raspberry Pi Zero W 1.1 board"
// source: https://www.theengineeringprojects.com/wp-content/uploads/2021/03/raspberry-pi-zero-5.png
// NOTE: GPIO16 was actually missing in the diagram.
const short physicalmapping[41]={
0, // placeholder. there is no PIN0
-1, -1,// PIN1 =3.3V DC, PIN2 =5V DC
2, -1,// 3,4
3, -1,// 5,6
4, 14, //PIN7 = PWM7,8
-1, 15,// 9,10
17, 18, //PIN11=UART_2_RTS,PIN12=I2S_4_CLK
27, -1, //13,14
22, 23, //15,16
-1, 24, //17,18
10, -1, //19,20
9, 25, //21,22
11, 8, //23,24
-1, 7, //25,26
0, 1, //27,28
5, -1, //29,30
6, 12, //31,32
13, -1, //33,34
19, 16, //35,36
26, 20, //37,38
-1, 21 //39,40
};
#else
#error "Please have a look at the source code and select one of the mappings from the sysfs numbering to the physical pins"
#endif
// this is the GPIO pinout for the waveshare OLED 1.3 SH1106 hat
// source: https://www.waveshare.com/1.3inch-oled-hat.htm
#define PIN_LEFT (physicalmapping[29])
#define PIN_UP (physicalmapping[31])
#define PIN_FIRE (physicalmapping[33])
#define PIN_DOWN (physicalmapping[35])
#define PIN_RIGHT (physicalmapping[37])
#define PIN_KEY1 (physicalmapping[36])
#define PIN_KEY2 (physicalmapping[38])
#define PIN_KEY3 (physicalmapping[40])
#define PIN_BL (physicalmapping[12])
#define PIN_DC (physicalmapping[18])
#define PIN_RST (physicalmapping[22])
#define PIN_CS (physicalmapping[24])
#define PIN_MOSI (physicalmapping[19])
#define PIN_MISO (physicalmapping[21])
#define PIN_SCLK (physicalmapping[23])
int gpio_export(int pin)
{
int fd;
char buffer[MAXBUFLEN];
int len;
fd=open("/sys/class/gpio/export", O_WRONLY);
if (fd<0)
{
fprintf(stderr,"GPIO export for pin %d failed\n",pin);
return RETVAL_NOK;
}
len=snprintf(buffer,MAXBUFLEN,"%d",pin);
write(fd,buffer,len);
close(fd);
return RETVAL_OK;
}
int gpio_unexport(int pin)
{
int fd;
char buffer[MAXBUFLEN];
int len;
fd=open("/sys/class/gpio/unexport", O_WRONLY);
if (fd<0)
{
fprintf(stderr,"GPIO unexport for pin %d failed\n",pin);
return RETVAL_NOK;
}
len=snprintf(buffer,MAXBUFLEN,"%d",pin);
write(fd,buffer,len);
close(fd);
return RETVAL_OK;
}
int gpio_direction(int pin,int direction)
{
int fd;
char buffer[MAXBUFLEN];
snprintf(buffer,MAXBUFLEN,"/sys/class/gpio/gpio%d/direction",pin);
fd=open(buffer,O_WRONLY);
if (fd<0)
{
fprintf(stderr,"GPIO direction for pin %d cannot be set\n",pin);
return RETVAL_NOK;
}
if (direction==GPIO_INPUT)
{
write(fd,"in",2);
} else if (direction==GPIO_OUTPUT) {
write(fd,"out",3);
} else {
fprintf(stderr,"Type error for direction for pin %d (%d unknown)\n",pin,direction);
}
close(fd);
return RETVAL_OK;
}
int gpio_write(int pin,int value)
{
int fd;
char buffer[MAXBUFLEN];
snprintf(buffer,MAXBUFLEN,"/sys/class/gpio/gpio%d/value",pin);
fd=open(buffer,O_WRONLY);
if (fd<0)
{
fprintf(stderr,"Cannot access GPIO pin %d\n",pin);
return RETVAL_NOK;
}
write(fd,value?"1":"0",1);
close(fd);
return RETVAL_OK;
}
int gpio_read(int pin,int* value)
{
int fd;
char buffer[MAXBUFLEN];
int len;
snprintf(buffer,MAXBUFLEN,"/sys/class/gpio/gpio%d/value",pin);
fd=open(buffer,O_RDONLY);
if (fd<0)
{
fprintf(stderr,"Cannot access GPIO pin %d\n",pin);
return RETVAL_NOK;
}
len=read(fd,buffer,3);
if (len<0)
{
fprintf(stderr,"Unable to read from pin %d\n",pin);
close(fd);
return RETVAL_NOK;
}
*value=atoi(buffer);
close(fd);
return RETVAL_OK;
}
int gpio_pins_up()
{
int retval;
retval=RETVAL_OK;
// start with the GPIO configuration
retval|=gpio_export(PIN_LEFT);
retval|=gpio_export(PIN_UP);
retval|=gpio_export(PIN_FIRE);
retval|=gpio_export(PIN_DOWN);
retval|=gpio_export(PIN_RIGHT);
retval|=gpio_export(PIN_KEY1);
retval|=gpio_export(PIN_KEY2);
retval|=gpio_export(PIN_KEY3);
retval|=gpio_direction(PIN_LEFT, GPIO_INPUT);
retval|=gpio_direction(PIN_UP, GPIO_INPUT);
retval|=gpio_direction(PIN_FIRE, GPIO_INPUT);
retval|=gpio_direction(PIN_DOWN, GPIO_INPUT);
retval|=gpio_direction(PIN_RIGHT, GPIO_INPUT);
retval|=gpio_direction(PIN_KEY1, GPIO_INPUT);
retval|=gpio_direction(PIN_KEY2, GPIO_INPUT);
retval|=gpio_direction(PIN_KEY3, GPIO_INPUT);
return retval;
}
int gpio_pins_down()
{
int retval;
retval=RETVAL_OK;
retval|=gpio_unexport(PIN_LEFT);
retval|=gpio_unexport(PIN_UP);
retval|=gpio_unexport(PIN_FIRE);
retval|=gpio_unexport(PIN_DOWN);
retval|=gpio_unexport(PIN_RIGHT);
retval|=gpio_unexport(PIN_KEY1);
retval|=gpio_unexport(PIN_KEY2);
retval|=gpio_unexport(PIN_KEY3);
return retval;
}
int sh1106_up()
{
int retval;
retval=RETVAL_OK;
retval|=gpio_pins_up();
return retval;
}
int sh1106_down()
{
return gpio_pins_down();
}
void graceFulExit(int signal_number)
{
printf("shutting down ...\n");
sh1106_down();
exit(0);
}
int main(int argc,char** argv)
{
char *names[8]={"LEFT","UP","FIRE","DOWN","RIGHT","KEY1","KEY2","KEY3"};
int pins[8]={PIN_LEFT,PIN_UP,PIN_FIRE,PIN_DOWN,PIN_RIGHT,PIN_KEY1,PIN_KEY2,PIN_KEY3};
int lastval[8]={0};
signal(SIGINT, graceFulExit);
if (sh1106_up())
{
fprintf(stderr,"unable to start up pins. sorry.\n");
return 1;
}
while (1)
{
int i;
for (i=0;i<8;i++)
{
int val;
gpio_read(pins[i],&val);
if (val!=lastval[i])
{
printf("%8s %d->%d\n",names[i],lastval[i],val);
}
lastval[i]=val;
}
}
graceFulExit(0);
return 0;
}

51
oledtest.c
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@ -106,19 +106,58 @@ const short physicalmapping[41]={
86, -1, //37,38
-1, -1 //39,40
};
#elif 1
#warning "This mapping is for the Raspberry Pi Zero W 1.1 board"
// source: https://www.theengineeringprojects.com/wp-content/uploads/2021/03/raspberry-pi-zero-5.png
// NOTE: GPIO16 was actually missing in the diagram.
const short physicalmapping[41]={
0, // placeholder. there is no PIN0
-1, -1,// PIN1 =3.3V DC, PIN2 =5V DC
2, -1,// 3,4
3, -1,// 5,6
4, 14, //PIN7 = PWM7,8
-1, 15,// 9,10
17, 18, //PIN11=UART_2_RTS,PIN12=I2S_4_CLK
27, -1, //13,14
22, 23, //15,16
-1, 24, //17,18
10, -1, //19,20
9, 25, //21,22
11, 8, //23,24
-1, 7, //25,26
0, 1, //27,28
5, -1, //29,30
6, 12, //31,32
13, -1, //33,34
19, 16, //35,36
26, 20, //37,38
-1, 21 //39,40
};
#else
#error "Please have a look at the source code and select one of the mappings from the sysfs numbering to the physical pins"
#endif
// this is the GPIO pinout for the waveshare OLED 1.3 SH1106 hat
#define PIN_CS (physicalmapping[24])
#define PIN_RST (physicalmapping[22])
#define PIN_DC (physicalmapping[18])
#define PIN_BL (physicalmapping[12])
// source: https://www.waveshare.com/1.3inch-oled-hat.htm
#define PIN_LEFT (physicalmapping[29])
#define PIN_UP (physicalmapping[31])
#define PIN_FIRE (physicalmapping[33])
#define PIN_DOWN (physicalmapping[35])
#define PIN_RIGHT (physicalmapping[37])
#define PIN_KEY1 (physicalmapping[36])
#define PIN_KEY2 (physicalmapping[38])
#define PIN_KEY3 (physicalmapping[40])
#define PIN_BL (physicalmapping[12])
#define PIN_DC (physicalmapping[18])
#define PIN_RST (physicalmapping[22])
#define PIN_CS (physicalmapping[24])
#define PIN_SCLK (physicalmapping[23])
#define PIN_MOSI (physicalmapping[19])
#define PIN_MISO (physicalmapping[21])
#define PIN_SCLK (physicalmapping[23])
int gpio_export(int pin)
@ -202,7 +241,7 @@ int gpio_read(int pin,int* value)
char buffer[MAXBUFLEN];
int len;
snprintf(buffer,MAXBUFLEN,"/sys/class/gpio/gpio%d/value",pin);
fd=open(buffer,O_WRONLY);
fd=open(buffer,O_RDONLY);
if (fd<0)
{
fprintf(stderr,"Cannot access GPIO pin %d\n",pin);