[ACM32G103RCT6 development board evaluation] + I2C OELD driver test

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[ACM32G103RCT6 development board evaluation] + I2C OELD driver test [Copy link]

 

Use ACM32G103RCT6 hardware i2c to drive OLED display under test

1. Hardware

The OLED hardware is driven using the PB6 and PB7 pins of I2C1.

2. Procedure

2.1, i2c initialization part

This part is the same as the previous configuration https://bbs.eeworld.com.cn/thread-1270022-1-1.html .

2.2、oled.c

#include "main.h"
#include "oled/oled.h"
#include "oled/codetab.h"

//extern I2C_HandleTypeDef hi2c1;
#define OLED_HANDLE             I2C_Handle

void I2C_WriteByte(uint8_t addr, uint8_t dat)
{
  uint8_t temp[2];
  temp[0] = dat;
	HAL_I2C_Mem_Write(&OLED_HANDLE,OLED_ADDRESS,addr,I2C_MEMADD_SIZE_8BIT,temp,1,10);
}


void WriteCmd(unsigned char I2C_Command)
{
    I2C_WriteByte(0x00, I2C_Command);
}

void WriteDat(unsigned char I2C_Data) 
{
    I2C_WriteByte(0x40, I2C_Data);
}

void OLED_WrCmd(unsigned char IIC_Command)
{
	WriteCmd(IIC_Command);
}

void OLED_Init(void)
{
	HAL_Delay(100);
	WriteCmd(0xAE); //display off
	WriteCmd(0x20);	//Set Memory Addressing Mode	
	WriteCmd(0x10);	//00,Horizontal Addressing Mode;01,Vertical Addressing Mode;10,Page Addressing Mode (RESET);11,Invalid
	WriteCmd(0xb0);	//Set Page Start Address for Page Addressing Mode,0-7
	WriteCmd(0xc8);	//Set COM Output Scan Direction
	WriteCmd(0x00); //---set low column address
	WriteCmd(0x10); //---set high column address
	WriteCmd(0x40); //--set start line address
	WriteCmd(0x81); //--set contrast control register
	WriteCmd(0xff); //亮度调节 0x00~0xff
	WriteCmd(0xa1); //--set segment re-map 0 to 127
	WriteCmd(0xa6); //--set normal display
	WriteCmd(0xa8); //--set multiplex ratio(1 to 64)
	WriteCmd(0x3F); //
	WriteCmd(0xa4); //0xa4,Output follows RAM content;0xa5,Output ignores RAM content
	WriteCmd(0xd3); //-set display offset
	WriteCmd(0x00); //-not offset
	WriteCmd(0xd5); //--set display clock divide ratio/oscillator frequency
	WriteCmd(0xf0); //--set divide ratio
	WriteCmd(0xd9); //--set pre-charge period
	WriteCmd(0x22); //
	WriteCmd(0xda); //--set com pins hardware configuration
	WriteCmd(0x12);
	WriteCmd(0xdb); //--set vcomh
	WriteCmd(0x40); //0x20,0.77xVcc
	WriteCmd(0x8d); //--set DC-DC enable
	WriteCmd(0x14); //
	WriteCmd(0xaf); //--turn on oled panel
}

void OLED_SetPos(unsigned char x, unsigned char y) 
{ 
	WriteCmd(0xb0+y);
	WriteCmd(((x&0xf0)>>4)|0x10);
	WriteCmd((x&0x0f)|0x01);
}

void OLED_Fill(unsigned char fill_Data)//全屏填充
{
	unsigned char m,n;
	for(m=0;m<8;m++)
	{
		WriteCmd(0xb0+m);		//page0-page1
		WriteCmd(0x00);		//low column start address
		WriteCmd(0x10);		//high column start address
		for(n=0;n<128;n++)
			{
				WriteDat(fill_Data);
			}
	}
}

void OLED_CLS(void)//清屏
{
	OLED_Fill(0xff);
}

void OLED_ON(void)
{
	WriteCmd(0X8D);  //设置电荷泵
	WriteCmd(0X14);  //开启电荷泵
	WriteCmd(0XAF);  //OLED唤醒
}

void OLED_OFF(void)
{
	WriteCmd(0X8D);  //设置电荷泵
	WriteCmd(0X10);  //关闭电荷泵
	WriteCmd(0XAE);  //OLED休眠
}

void OLED_ShowStr(unsigned char x, unsigned char y, unsigned char ch[], unsigned char TextSize)
{
	unsigned char c = 0,i = 0,j = 0;
	switch(TextSize)
	{
		case 1:
		{
			while(ch[j] != '\0')
			{
				c = ch[j] - 32;
				if(x > 126)
				{
					x = 0;
					y++;
				}
				OLED_SetPos(x,y);
				for(i=0;i<6;i++)
					WriteDat(F6x8[c][i]);
				x += 6;
				j++;
			}
		}break;
		case 2:
		{
			while(ch[j] != '\0')
			{
				c = ch[j] - 32;
				if(x > 120)
				{
					x = 0;
					y++;
				}
				OLED_SetPos(x,y);
				for(i=0;i<8;i++)
					WriteDat(F8X16[c*16+i]);
				OLED_SetPos(x,y+1);
				for(i=0;i<8;i++)
					WriteDat(F8X16[c*16+i+8]);
				x += 8;
				j++;
			}
		}break;
	}
}

void OLED_ShowCN(unsigned char x, unsigned char y, unsigned char N)
{
	unsigned char wm=0;
	unsigned int  adder=32*N;
	OLED_SetPos(x , y);
	for(wm = 0;wm < 16;wm++)
	{
		WriteDat(F16x16[adder]);
		adder += 1;
	}
	OLED_SetPos(x,y + 1);
	for(wm = 0;wm < 16;wm++)
	{
		WriteDat(F16x16[adder]);
		adder += 1;
	}
}

void OLED_DrawBMP(unsigned char x0,unsigned char y0,unsigned char x1,unsigned char y1,unsigned char BMP[])
{
	unsigned int j=0;
	unsigned char x,y;

  if(y1%8==0)
		y = y1/8;
  else
		y = y1/8 + 1;
	for(y=y0;y<y1;y++)
	{
		OLED_SetPos(x0,y);
    for(x=x0;x<x1;x++)
		{
			WriteDat(BMP[j++]);
		}
	}
}

void oled_test(void)
{
	OLED_Init();
	OLED_Fill(0x00);
	OLED_ShowStr(0,0,"ACM32G103RCT6",2);
	OLED_ShowStr(0,2,"I2C OLED TEST",2);	
}

2.3、main.c

#include "main.h" 

int main(void)
{
	HAL_Init();  
	SystemClock_Config();    
	usart_init(115200);
	printf("\r\n\r\n====== ACM32G103 MCU is runing ======\r\nSysCoreClk: %dHz, HCLK:%dHz\r\nPCLK1:%dHz, PCLK2:%dHz\r\n\r\n",g_SystemCoreClock, HAL_RCC_GetHCLKFreq(),HAL_RCC_GetPCLK1Freq(),HAL_RCC_GetPCLK2Freq());  
   
	init_led();
	init_tim2();
	init_key();
	I2C_Init();
	//adc_test();
	//eeprom_test();
	oled_test();
	while(1)
	{
		//HAL_Delay(500);
		//led1_tog();
		//printf("https://bbs.eeworld.com.cn/\r\n");
	}
}

3. Program running

After downloading the program, reset the development board and the OLED will display as follows