Klagarge/MSE-CSEL
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add mini project

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This commit is contained in:
Jacques Supcik
2022-06-02 22:45:18 +02:00
parent 042c3fd02d
commit ea25559612
5 changed files with 343 additions and 0 deletions
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58
src/07_miniproj/oled/Makefile Normal file
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EXEC=oleds
DTB = mydt.dtb
SRCS=$(wildcard *.c)
target=nano
TOOLCHAIN_PATH=/buildroot/output/host/usr/bin/
TOOLCHAIN=$(TOOLCHAIN_PATH)aarch64-linux-
CFLAGS=-Wall -Wextra -g -c -O0 -MD -std=gnu11
CFLAGS+=-mcpu=cortex-a53 -funwind-tables
##CFLAGS+=-O2 -fno-omit-frame-pointer
OBJDIR=.obj/nano
CC=$(TOOLCHAIN)gcc
LD=$(TOOLCHAIN)gcc
AR=$(TOOLCHAIN)ar
STRIP=$(TOOLCHAIN)strip
OBJDIR=.obj/$(target)
OBJS= $(addprefix $(OBJDIR)/, $(SRCS:.c=.o))
$(OBJDIR)/%o: %c
$(CC) $(CFLAGS) $< -o $@
all: $(OBJDIR)/ $(EXEC) dtb
echo $(EXEC)
echo $(SRCS)
$(EXEC): $(OBJS) $(LINKER_SCRIPT)
$(LD) $(OBJS) $(LDFLAGS) -o $@
$(OBJDIR)/:
mkdir -p $(OBJDIR)
clean:
rm -Rf $(OBJDIR) $(EXEC) $(EXEC)_s .obj *.dtb *~
clean_all: clean
CVER := aarch64-linux-
KVER := 5.15.21
CPU := arm64
KDIR := /buildroot/output/build/linux-$(KVER)/
PWD := $(shell pwd)
INCL+=-I. -I$(KDIR)/include -I$(KDIR)/arch/arm64/boot/dts/
DTS = $(DTB:.dtb=.dts)
dtb: $(DTB)
$(DTB) : $(DTS)
ln -s $(KDIR)/arch/arm/boot/dts arm
-cpp $(INCL) -E -P -x assembler-with-cpp $(DTS) | dtc -I dts -O dtb -o $(DTB) -
rm arm
-include $(OBJS:.o=.d)
.PHONY: all clean clean_all dtb

23
src/07_miniproj/oled/main.c Normal file
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#include "ssd1306.h"
int main()
{
ssd1306_init();
ssd1306_set_position (0,0);
ssd1306_puts("CSEL1a - SP.07");
ssd1306_set_position (0,1);
ssd1306_puts(" Demo - SW");
ssd1306_set_position (0,2);
ssd1306_puts("--------------");
ssd1306_set_position (0,3);
ssd1306_puts("Temp: 35'C");
ssd1306_set_position (0,4);
ssd1306_puts("Freq: 1Hz");
ssd1306_set_position (0,5);
ssd1306_puts("Duty: 50%");
return 0;
}

13
src/07_miniproj/oled/mydt.dts Normal file
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/dts-v1/;
#include "allwinner/sun50i-h5-nanopi-neo-plus2.dts"
/ {
/delete-node/ leds;
};
&i2c0 {
status = "okay";
};

236
src/07_miniproj/oled/ssd1306.c Normal file
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#include <stdio.h>
#include <stdlib.h>
#include <linux/i2c-dev.h>
#include <fcntl.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include "ssd1306.h"
// this code is mainly based on Bakebit software: https://github.com/friendlyarm/BakeBit
#define ARRAY_OF(x) (sizeof(x)/sizeof(x[0]))
#define I2C_BUS "/dev/i2c-0"
#define OLED_ADDR 0x3c
#define OLED_COMMAND_MODE 0x00
#define OLED_DATA_MODE 0x40
#define OLED_DISPLAY_OFF_CMD 0xae
#define OLED_DISPLAY_ON_CMD 0xaf
static const uint8_t font[][8] = {
{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},
{0x00,0x00,0x5F,0x00,0x00,0x00,0x00,0x00},
{0x00,0x00,0x07,0x00,0x07,0x00,0x00,0x00},
{0x00,0x14,0x7F,0x14,0x7F,0x14,0x00,0x00},
{0x00,0x24,0x2A,0x7F,0x2A,0x12,0x00,0x00},
{0x00,0x23,0x13,0x08,0x64,0x62,0x00,0x00},
{0x00,0x36,0x49,0x55,0x22,0x50,0x00,0x00},
{0x00,0x00,0x05,0x03,0x00,0x00,0x00,0x00},
{0x00,0x1C,0x22,0x41,0x00,0x00,0x00,0x00},
{0x00,0x41,0x22,0x1C,0x00,0x00,0x00,0x00},
{0x00,0x08,0x2A,0x1C,0x2A,0x08,0x00,0x00},
{0x00,0x08,0x08,0x3E,0x08,0x08,0x00,0x00},
{0x00,0xA0,0x60,0x00,0x00,0x00,0x00,0x00},
{0x00,0x08,0x08,0x08,0x08,0x08,0x00,0x00},
{0x00,0x60,0x60,0x00,0x00,0x00,0x00,0x00},
{0x00,0x20,0x10,0x08,0x04,0x02,0x00,0x00},
{0x00,0x3E,0x51,0x49,0x45,0x3E,0x00,0x00},
{0x00,0x00,0x42,0x7F,0x40,0x00,0x00,0x00},
{0x00,0x62,0x51,0x49,0x49,0x46,0x00,0x00},
{0x00,0x22,0x41,0x49,0x49,0x36,0x00,0x00},
{0x00,0x18,0x14,0x12,0x7F,0x10,0x00,0x00},
{0x00,0x27,0x45,0x45,0x45,0x39,0x00,0x00},
{0x00,0x3C,0x4A,0x49,0x49,0x30,0x00,0x00},
{0x00,0x01,0x71,0x09,0x05,0x03,0x00,0x00},
{0x00,0x36,0x49,0x49,0x49,0x36,0x00,0x00},
{0x00,0x06,0x49,0x49,0x29,0x1E,0x00,0x00},
{0x00,0x00,0x36,0x36,0x00,0x00,0x00,0x00},
{0x00,0x00,0xAC,0x6C,0x00,0x00,0x00,0x00},
{0x00,0x08,0x14,0x22,0x41,0x00,0x00,0x00},
{0x00,0x14,0x14,0x14,0x14,0x14,0x00,0x00},
{0x00,0x41,0x22,0x14,0x08,0x00,0x00,0x00},
{0x00,0x02,0x01,0x51,0x09,0x06,0x00,0x00},
{0x00,0x32,0x49,0x79,0x41,0x3E,0x00,0x00},
{0x00,0x7E,0x09,0x09,0x09,0x7E,0x00,0x00},
{0x00,0x7F,0x49,0x49,0x49,0x36,0x00,0x00},
{0x00,0x3E,0x41,0x41,0x41,0x22,0x00,0x00},
{0x00,0x7F,0x41,0x41,0x22,0x1C,0x00,0x00},
{0x00,0x7F,0x49,0x49,0x49,0x41,0x00,0x00},
{0x00,0x7F,0x09,0x09,0x09,0x01,0x00,0x00},
{0x00,0x3E,0x41,0x41,0x51,0x72,0x00,0x00},
{0x00,0x7F,0x08,0x08,0x08,0x7F,0x00,0x00},
{0x00,0x41,0x7F,0x41,0x00,0x00,0x00,0x00},
{0x00,0x20,0x40,0x41,0x3F,0x01,0x00,0x00},
{0x00,0x7F,0x08,0x14,0x22,0x41,0x00,0x00},
{0x00,0x7F,0x40,0x40,0x40,0x40,0x00,0x00},
{0x00,0x7F,0x02,0x0C,0x02,0x7F,0x00,0x00},
{0x00,0x7F,0x04,0x08,0x10,0x7F,0x00,0x00},
{0x00,0x3E,0x41,0x41,0x41,0x3E,0x00,0x00},
{0x00,0x7F,0x09,0x09,0x09,0x06,0x00,0x00},
{0x00,0x3E,0x41,0x51,0x21,0x5E,0x00,0x00},
{0x00,0x7F,0x09,0x19,0x29,0x46,0x00,0x00},
{0x00,0x26,0x49,0x49,0x49,0x32,0x00,0x00},
{0x00,0x01,0x01,0x7F,0x01,0x01,0x00,0x00},
{0x00,0x3F,0x40,0x40,0x40,0x3F,0x00,0x00},
{0x00,0x1F,0x20,0x40,0x20,0x1F,0x00,0x00},
{0x00,0x3F,0x40,0x38,0x40,0x3F,0x00,0x00},
{0x00,0x63,0x14,0x08,0x14,0x63,0x00,0x00},
{0x00,0x03,0x04,0x78,0x04,0x03,0x00,0x00},
{0x00,0x61,0x51,0x49,0x45,0x43,0x00,0x00},
{0x00,0x7F,0x41,0x41,0x00,0x00,0x00,0x00},
{0x00,0x02,0x04,0x08,0x10,0x20,0x00,0x00},
{0x00,0x41,0x41,0x7F,0x00,0x00,0x00,0x00},
{0x00,0x04,0x02,0x01,0x02,0x04,0x00,0x00},
{0x00,0x80,0x80,0x80,0x80,0x80,0x00,0x00},
{0x00,0x01,0x02,0x04,0x00,0x00,0x00,0x00},
{0x00,0x20,0x54,0x54,0x54,0x78,0x00,0x00},
{0x00,0x7F,0x48,0x44,0x44,0x38,0x00,0x00},
{0x00,0x38,0x44,0x44,0x28,0x00,0x00,0x00},
{0x00,0x38,0x44,0x44,0x48,0x7F,0x00,0x00},
{0x00,0x38,0x54,0x54,0x54,0x18,0x00,0x00},
{0x00,0x08,0x7E,0x09,0x02,0x00,0x00,0x00},
{0x00,0x18,0xA4,0xA4,0xA4,0x7C,0x00,0x00},
{0x00,0x7F,0x08,0x04,0x04,0x78,0x00,0x00},
{0x00,0x00,0x7D,0x00,0x00,0x00,0x00,0x00},
{0x00,0x80,0x84,0x7D,0x00,0x00,0x00,0x00},
{0x00,0x7F,0x10,0x28,0x44,0x00,0x00,0x00},
{0x00,0x41,0x7F,0x40,0x00,0x00,0x00,0x00},
{0x00,0x7C,0x04,0x18,0x04,0x78,0x00,0x00},
{0x00,0x7C,0x08,0x04,0x7C,0x00,0x00,0x00},
{0x00,0x38,0x44,0x44,0x38,0x00,0x00,0x00},
{0x00,0xFC,0x24,0x24,0x18,0x00,0x00,0x00},
{0x00,0x18,0x24,0x24,0xFC,0x00,0x00,0x00},
{0x00,0x00,0x7C,0x08,0x04,0x00,0x00,0x00},
{0x00,0x48,0x54,0x54,0x24,0x00,0x00,0x00},
{0x00,0x04,0x7F,0x44,0x00,0x00,0x00,0x00},
{0x00,0x3C,0x40,0x40,0x7C,0x00,0x00,0x00},
{0x00,0x1C,0x20,0x40,0x20,0x1C,0x00,0x00},
{0x00,0x3C,0x40,0x30,0x40,0x3C,0x00,0x00},
{0x00,0x44,0x28,0x10,0x28,0x44,0x00,0x00},
{0x00,0x1C,0xA0,0xA0,0x7C,0x00,0x00,0x00},
{0x00,0x44,0x64,0x54,0x4C,0x44,0x00,0x00},
{0x00,0x08,0x36,0x41,0x00,0x00,0x00,0x00},
{0x00,0x00,0x7F,0x00,0x00,0x00,0x00,0x00},
{0x00,0x41,0x36,0x08,0x00,0x00,0x00,0x00},
{0x00,0x02,0x01,0x01,0x02,0x01,0x00,0x00},
{0x00,0x02,0x05,0x05,0x02,0x00,0x00,0x00},
};
static const uint8_t init_commands[] = {
0xAE, //display off
0x00, //set lower column address
0x10, //set higher column address
0x40, //set display start line
0xB0, //set page address
0x81,
0xCF, //0~255????????????????
0xA1, //set segment remap
0xA6, //normal / reverse
0xA8, //multiplex ratio
0x3F, //duty = 1/64
0xC8, //Com scan direction
0xD3, //set display offset
0x00,
0xD5, //set osc division
0x80,
0xD9, //set pre-charge period
0xF1,
0xDA, //set COM pins
0x12,
0xDB, //set vcomh
0x40,
0x8D, //set charge pump enable
0x14,
0xAF, //display ON
};
static int fd;
static void send_command(uint8_t cmd)
{
uint8_t buf[2]= {
[0] = OLED_COMMAND_MODE,
[1] = cmd,
};
if (write(fd, buf, sizeof(buf)) != sizeof(buf)) {
printf ("error while sending command\n");
}
}
void send_data(uint8_t byte)
{
uint8_t buf[2] = {
[0] = OLED_DATA_MODE,
[1] = byte,
};
if (write(fd, buf, sizeof(buf)) != sizeof(buf)) {
printf ("error while sending data\n");
}
}
void ssd1306_set_position (uint32_t column, uint32_t row)
{
send_command(0xb0 + row); //set page address
send_command(0x00 + (8*column & 0x0f)); //set column lower address
send_command(0x10 + ((8*column>>4)&0x0f)); //set column higher address
}
void ssd1306_putc(char c)
{
if ((c<32) || (c>127)) // Ignore non-printable ASCII characters
c=' ';
c-=32;
for (int i=0; i<8; i++) {
uint8_t data=font[(int)c][i];
send_data(data);
}
}
void ssd1306_puts(const char* str)
{
while (*str != 0)
ssd1306_putc(*str++);
}
void ssd1306_clear_display()
{
send_command(OLED_DISPLAY_OFF_CMD);// display off
for (int j=0; j<8; j++) {
ssd1306_set_position(0,j);
for (int i=0; i<16; i++) //clear all columns
ssd1306_putc(' ');
}
send_command(OLED_DISPLAY_ON_CMD); //display on
ssd1306_set_position(0,0);
}
int ssd1306_init()
{
fd = open(I2C_BUS, O_RDWR);
if (fd < 0) {
printf("ERROR: unable to open i2c bus interface (%s)\n", I2C_BUS);
return -1;
}
if (ioctl(fd, I2C_SLAVE, OLED_ADDR) < 0) {
printf("ERROR: unable to access OLED as slave\n");
return -1;
}
for (unsigned i=0; i<ARRAY_OF(init_commands); i++) {
send_command (init_commands[i]);
}
ssd1306_clear_display();
return 0;
}

13
src/07_miniproj/oled/ssd1306.h Normal file
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#pragma once
#ifndef SSD1306_H
#define SSD1306_H
#include <stdint.h>
int ssd1306_init();
void ssd1306_set_position (uint32_t column, uint32_t row);
void ssd1306_putc(char c);
void ssd1306_puts(const char* str);
void ssd1306_clear_display();
#endif