add mini project
This commit is contained in:
Jacques Supcik
58
src/07_miniproj/oled/Makefile
Normal file
58
src/07_miniproj/oled/Makefile
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@@ -0,0 +1,58 @@
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EXEC=oleds
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DTB = mydt.dtb
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SRCS=$(wildcard *.c)
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target=nano
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TOOLCHAIN_PATH=/buildroot/output/host/usr/bin/
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TOOLCHAIN=$(TOOLCHAIN_PATH)aarch64-linux-
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CFLAGS=-Wall -Wextra -g -c -O0 -MD -std=gnu11
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CFLAGS+=-mcpu=cortex-a53 -funwind-tables
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##CFLAGS+=-O2 -fno-omit-frame-pointer
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OBJDIR=.obj/nano
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CC=$(TOOLCHAIN)gcc
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LD=$(TOOLCHAIN)gcc
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AR=$(TOOLCHAIN)ar
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STRIP=$(TOOLCHAIN)strip
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OBJDIR=.obj/$(target)
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OBJS= $(addprefix $(OBJDIR)/, $(SRCS:.c=.o))
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$(OBJDIR)/%o: %c
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$(CC) $(CFLAGS) $< -o $@
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all: $(OBJDIR)/ $(EXEC) dtb
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echo $(EXEC)
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echo $(SRCS)
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$(EXEC): $(OBJS) $(LINKER_SCRIPT)
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$(LD) $(OBJS) $(LDFLAGS) -o $@
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$(OBJDIR)/:
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mkdir -p $(OBJDIR)
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clean:
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rm -Rf $(OBJDIR) $(EXEC) $(EXEC)_s .obj *.dtb *~
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clean_all: clean
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CVER := aarch64-linux-
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KVER := 5.15.21
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CPU := arm64
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KDIR := /buildroot/output/build/linux-$(KVER)/
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PWD := $(shell pwd)
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INCL+=-I. -I$(KDIR)/include -I$(KDIR)/arch/arm64/boot/dts/
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DTS = $(DTB:.dtb=.dts)
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dtb: $(DTB)
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$(DTB) : $(DTS)
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ln -s $(KDIR)/arch/arm/boot/dts arm
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-cpp $(INCL) -E -P -x assembler-with-cpp $(DTS) | dtc -I dts -O dtb -o $(DTB) -
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rm arm
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-include $(OBJS:.o=.d)
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.PHONY: all clean clean_all dtb
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23
src/07_miniproj/oled/main.c
Normal file
23
src/07_miniproj/oled/main.c
Normal file
@@ -0,0 +1,23 @@
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#include "ssd1306.h"
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int main()
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{
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ssd1306_init();
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ssd1306_set_position (0,0);
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ssd1306_puts("CSEL1a - SP.07");
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ssd1306_set_position (0,1);
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ssd1306_puts(" Demo - SW");
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ssd1306_set_position (0,2);
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ssd1306_puts("--------------");
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ssd1306_set_position (0,3);
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ssd1306_puts("Temp: 35'C");
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ssd1306_set_position (0,4);
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ssd1306_puts("Freq: 1Hz");
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ssd1306_set_position (0,5);
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ssd1306_puts("Duty: 50%");
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return 0;
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}
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13
src/07_miniproj/oled/mydt.dts
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13
src/07_miniproj/oled/mydt.dts
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@@ -0,0 +1,13 @@
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/dts-v1/;
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#include "allwinner/sun50i-h5-nanopi-neo-plus2.dts"
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/ {
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/delete-node/ leds;
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};
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&i2c0 {
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status = "okay";
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};
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236
src/07_miniproj/oled/ssd1306.c
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236
src/07_miniproj/oled/ssd1306.c
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@@ -0,0 +1,236 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <linux/i2c-dev.h>
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#include <fcntl.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include "ssd1306.h"
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// this code is mainly based on Bakebit software: https://github.com/friendlyarm/BakeBit
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#define ARRAY_OF(x) (sizeof(x)/sizeof(x[0]))
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#define I2C_BUS "/dev/i2c-0"
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#define OLED_ADDR 0x3c
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#define OLED_COMMAND_MODE 0x00
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#define OLED_DATA_MODE 0x40
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#define OLED_DISPLAY_OFF_CMD 0xae
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#define OLED_DISPLAY_ON_CMD 0xaf
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static const uint8_t font[][8] = {
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{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},
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{0x00,0x00,0x5F,0x00,0x00,0x00,0x00,0x00},
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{0x00,0x00,0x07,0x00,0x07,0x00,0x00,0x00},
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{0x00,0x14,0x7F,0x14,0x7F,0x14,0x00,0x00},
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{0x00,0x24,0x2A,0x7F,0x2A,0x12,0x00,0x00},
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{0x00,0x23,0x13,0x08,0x64,0x62,0x00,0x00},
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{0x00,0x36,0x49,0x55,0x22,0x50,0x00,0x00},
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{0x00,0x00,0x05,0x03,0x00,0x00,0x00,0x00},
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{0x00,0x1C,0x22,0x41,0x00,0x00,0x00,0x00},
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{0x00,0x41,0x22,0x1C,0x00,0x00,0x00,0x00},
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{0x00,0x08,0x2A,0x1C,0x2A,0x08,0x00,0x00},
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{0x00,0x08,0x08,0x3E,0x08,0x08,0x00,0x00},
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{0x00,0xA0,0x60,0x00,0x00,0x00,0x00,0x00},
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{0x00,0x08,0x08,0x08,0x08,0x08,0x00,0x00},
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{0x00,0x60,0x60,0x00,0x00,0x00,0x00,0x00},
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{0x00,0x20,0x10,0x08,0x04,0x02,0x00,0x00},
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{0x00,0x3E,0x51,0x49,0x45,0x3E,0x00,0x00},
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{0x00,0x00,0x42,0x7F,0x40,0x00,0x00,0x00},
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{0x00,0x62,0x51,0x49,0x49,0x46,0x00,0x00},
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{0x00,0x22,0x41,0x49,0x49,0x36,0x00,0x00},
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{0x00,0x18,0x14,0x12,0x7F,0x10,0x00,0x00},
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{0x00,0x27,0x45,0x45,0x45,0x39,0x00,0x00},
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{0x00,0x3C,0x4A,0x49,0x49,0x30,0x00,0x00},
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{0x00,0x01,0x71,0x09,0x05,0x03,0x00,0x00},
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{0x00,0x36,0x49,0x49,0x49,0x36,0x00,0x00},
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{0x00,0x06,0x49,0x49,0x29,0x1E,0x00,0x00},
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{0x00,0x00,0x36,0x36,0x00,0x00,0x00,0x00},
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{0x00,0x00,0xAC,0x6C,0x00,0x00,0x00,0x00},
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{0x00,0x08,0x14,0x22,0x41,0x00,0x00,0x00},
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{0x00,0x14,0x14,0x14,0x14,0x14,0x00,0x00},
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{0x00,0x41,0x22,0x14,0x08,0x00,0x00,0x00},
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{0x00,0x02,0x01,0x51,0x09,0x06,0x00,0x00},
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{0x00,0x32,0x49,0x79,0x41,0x3E,0x00,0x00},
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{0x00,0x7E,0x09,0x09,0x09,0x7E,0x00,0x00},
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{0x00,0x7F,0x49,0x49,0x49,0x36,0x00,0x00},
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{0x00,0x3E,0x41,0x41,0x41,0x22,0x00,0x00},
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{0x00,0x7F,0x41,0x41,0x22,0x1C,0x00,0x00},
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{0x00,0x7F,0x49,0x49,0x49,0x41,0x00,0x00},
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{0x00,0x7F,0x09,0x09,0x09,0x01,0x00,0x00},
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{0x00,0x3E,0x41,0x41,0x51,0x72,0x00,0x00},
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{0x00,0x7F,0x08,0x08,0x08,0x7F,0x00,0x00},
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{0x00,0x41,0x7F,0x41,0x00,0x00,0x00,0x00},
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{0x00,0x20,0x40,0x41,0x3F,0x01,0x00,0x00},
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{0x00,0x7F,0x08,0x14,0x22,0x41,0x00,0x00},
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{0x00,0x7F,0x40,0x40,0x40,0x40,0x00,0x00},
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{0x00,0x7F,0x02,0x0C,0x02,0x7F,0x00,0x00},
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{0x00,0x7F,0x04,0x08,0x10,0x7F,0x00,0x00},
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{0x00,0x3E,0x41,0x41,0x41,0x3E,0x00,0x00},
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{0x00,0x7F,0x09,0x09,0x09,0x06,0x00,0x00},
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{0x00,0x3E,0x41,0x51,0x21,0x5E,0x00,0x00},
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{0x00,0x7F,0x09,0x19,0x29,0x46,0x00,0x00},
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{0x00,0x26,0x49,0x49,0x49,0x32,0x00,0x00},
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{0x00,0x01,0x01,0x7F,0x01,0x01,0x00,0x00},
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{0x00,0x3F,0x40,0x40,0x40,0x3F,0x00,0x00},
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{0x00,0x1F,0x20,0x40,0x20,0x1F,0x00,0x00},
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{0x00,0x3F,0x40,0x38,0x40,0x3F,0x00,0x00},
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{0x00,0x63,0x14,0x08,0x14,0x63,0x00,0x00},
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{0x00,0x03,0x04,0x78,0x04,0x03,0x00,0x00},
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{0x00,0x61,0x51,0x49,0x45,0x43,0x00,0x00},
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{0x00,0x7F,0x41,0x41,0x00,0x00,0x00,0x00},
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{0x00,0x02,0x04,0x08,0x10,0x20,0x00,0x00},
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{0x00,0x41,0x41,0x7F,0x00,0x00,0x00,0x00},
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{0x00,0x04,0x02,0x01,0x02,0x04,0x00,0x00},
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{0x00,0x80,0x80,0x80,0x80,0x80,0x00,0x00},
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{0x00,0x01,0x02,0x04,0x00,0x00,0x00,0x00},
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{0x00,0x20,0x54,0x54,0x54,0x78,0x00,0x00},
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{0x00,0x7F,0x48,0x44,0x44,0x38,0x00,0x00},
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{0x00,0x38,0x44,0x44,0x28,0x00,0x00,0x00},
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{0x00,0x38,0x44,0x44,0x48,0x7F,0x00,0x00},
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{0x00,0x38,0x54,0x54,0x54,0x18,0x00,0x00},
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{0x00,0x08,0x7E,0x09,0x02,0x00,0x00,0x00},
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{0x00,0x18,0xA4,0xA4,0xA4,0x7C,0x00,0x00},
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{0x00,0x7F,0x08,0x04,0x04,0x78,0x00,0x00},
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{0x00,0x00,0x7D,0x00,0x00,0x00,0x00,0x00},
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{0x00,0x80,0x84,0x7D,0x00,0x00,0x00,0x00},
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{0x00,0x7F,0x10,0x28,0x44,0x00,0x00,0x00},
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{0x00,0x41,0x7F,0x40,0x00,0x00,0x00,0x00},
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{0x00,0x7C,0x04,0x18,0x04,0x78,0x00,0x00},
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{0x00,0x7C,0x08,0x04,0x7C,0x00,0x00,0x00},
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{0x00,0x38,0x44,0x44,0x38,0x00,0x00,0x00},
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{0x00,0xFC,0x24,0x24,0x18,0x00,0x00,0x00},
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{0x00,0x18,0x24,0x24,0xFC,0x00,0x00,0x00},
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{0x00,0x00,0x7C,0x08,0x04,0x00,0x00,0x00},
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{0x00,0x48,0x54,0x54,0x24,0x00,0x00,0x00},
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{0x00,0x04,0x7F,0x44,0x00,0x00,0x00,0x00},
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{0x00,0x3C,0x40,0x40,0x7C,0x00,0x00,0x00},
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{0x00,0x1C,0x20,0x40,0x20,0x1C,0x00,0x00},
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{0x00,0x3C,0x40,0x30,0x40,0x3C,0x00,0x00},
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{0x00,0x44,0x28,0x10,0x28,0x44,0x00,0x00},
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{0x00,0x1C,0xA0,0xA0,0x7C,0x00,0x00,0x00},
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{0x00,0x44,0x64,0x54,0x4C,0x44,0x00,0x00},
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{0x00,0x08,0x36,0x41,0x00,0x00,0x00,0x00},
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{0x00,0x00,0x7F,0x00,0x00,0x00,0x00,0x00},
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{0x00,0x41,0x36,0x08,0x00,0x00,0x00,0x00},
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{0x00,0x02,0x01,0x01,0x02,0x01,0x00,0x00},
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{0x00,0x02,0x05,0x05,0x02,0x00,0x00,0x00},
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};
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static const uint8_t init_commands[] = {
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0xAE, //display off
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0x00, //set lower column address
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0x10, //set higher column address
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0x40, //set display start line
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0xB0, //set page address
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0x81,
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0xCF, //0~255????????????????
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0xA1, //set segment remap
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0xA6, //normal / reverse
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0xA8, //multiplex ratio
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0x3F, //duty = 1/64
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0xC8, //Com scan direction
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0xD3, //set display offset
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0x00,
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0xD5, //set osc division
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0x80,
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0xD9, //set pre-charge period
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0xF1,
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0xDA, //set COM pins
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0x12,
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0xDB, //set vcomh
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0x40,
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0x8D, //set charge pump enable
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0x14,
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0xAF, //display ON
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};
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static int fd;
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static void send_command(uint8_t cmd)
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{
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uint8_t buf[2]= {
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[0] = OLED_COMMAND_MODE,
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[1] = cmd,
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};
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if (write(fd, buf, sizeof(buf)) != sizeof(buf)) {
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printf ("error while sending command\n");
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}
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}
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void send_data(uint8_t byte)
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{
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uint8_t buf[2] = {
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[0] = OLED_DATA_MODE,
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[1] = byte,
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};
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if (write(fd, buf, sizeof(buf)) != sizeof(buf)) {
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printf ("error while sending data\n");
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}
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}
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void ssd1306_set_position (uint32_t column, uint32_t row)
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{
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send_command(0xb0 + row); //set page address
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send_command(0x00 + (8*column & 0x0f)); //set column lower address
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send_command(0x10 + ((8*column>>4)&0x0f)); //set column higher address
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}
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void ssd1306_putc(char c)
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{
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if ((c<32) || (c>127)) // Ignore non-printable ASCII characters
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c=' ';
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c-=32;
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for (int i=0; i<8; i++) {
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uint8_t data=font[(int)c][i];
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send_data(data);
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}
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}
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void ssd1306_puts(const char* str)
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{
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while (*str != 0)
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ssd1306_putc(*str++);
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}
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void ssd1306_clear_display()
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{
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send_command(OLED_DISPLAY_OFF_CMD);// display off
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for (int j=0; j<8; j++) {
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ssd1306_set_position(0,j);
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for (int i=0; i<16; i++) //clear all columns
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ssd1306_putc(' ');
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}
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send_command(OLED_DISPLAY_ON_CMD); //display on
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ssd1306_set_position(0,0);
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}
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int ssd1306_init()
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{
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fd = open(I2C_BUS, O_RDWR);
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if (fd < 0) {
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printf("ERROR: unable to open i2c bus interface (%s)\n", I2C_BUS);
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return -1;
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}
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if (ioctl(fd, I2C_SLAVE, OLED_ADDR) < 0) {
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printf("ERROR: unable to access OLED as slave\n");
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return -1;
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}
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for (unsigned i=0; i<ARRAY_OF(init_commands); i++) {
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send_command (init_commands[i]);
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}
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ssd1306_clear_display();
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return 0;
|
||||
}
|
||||
|
||||
|
||||
|
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13
src/07_miniproj/oled/ssd1306.h
Normal file
13
src/07_miniproj/oled/ssd1306.h
Normal file
@@ -0,0 +1,13 @@
|
||||
#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
|
||||
Reference in New Issue
Block a user