【RA4M2-SENSOR】I2C驱动OLED

使用 SCI 下的 I2C 来驱动 OLED

首先配置 SCI_I2C0

参数保持默认就行

底层驱动

volatile int i2c_send_complete_flag = 0;
volatile uint16_t timeout;


void sci_i2c_master_callback(i2c_master_callback_args_t  * p_args)
{
   switch (p_args->event)
   {
      case I2C_MASTER_EVENT_TX_COMPLETE:
      {
            i2c_send_complete_flag = 1;
            break;
      }
      default:
            break;
   }
}
void OLED_WriteCommand(uint8_t Command)
{
	uint8_t send_buffer[2];
	send_buffer[0] = 0x00;
	send_buffer[1] = Command;
	timeout = 0xffff;
	fsp_err_t err = R_SCI_I2C_Write(&g_i2c0_ctrl,send_buffer,2,false);
	assert(err == 0);
	while(!i2c_send_complete_flag  && timeout)
	{
		timeout--;
	}
	i2c_send_complete_flag = 0;
}
void OLED_WriteData(uint8_t *Data, uint8_t Count)
{	
	uint8_t send_buffer[1+Count];
	send_buffer[0] = 0x40;
	for(uint8_t i = 0;i < Count;i++)
	{
		send_buffer[1+i] = Data[i];
	}
	timeout = 0xffff;
	fsp_err_t err = R_SCI_I2C_Write(&g_i2c0_ctrl,send_buffer,1 + Count,false);
	assert(err == 0);
	while(!i2c_send_complete_flag  && timeout)
	{
		timeout--;
	}
	i2c_send_complete_flag = 0;
}

测试

void hal_entry(void)
{
	assert(UART_Init() == 0);
	assert(SysTick_Init() == 0);
	OLED_Init();	
	/* TODO: add your own code here */
	while(1)
	{
		for(uint16_t x=0;x<256;x++)
		{
			OLED_Clear();
			OLED_ShowString(x,25,"RA4M2 I2C TEST",8);
			OLED_ShowString(x - 128,25,"RA4M2 I2C TEST",8);
			Delay_ms(10);
			OLED_Update();
		}

	}
#if BSP_TZ_SECURE_BUILD
    /* Enter non-secure code */
    R_BSP_NonSecureEnter();
#endif
}