[参考译文] ADS1115：ADS1115 4个通道中的3个通道具有稳定的读数、但第4个通道的噪声太大

void UV_Process()
{

	// need a switch case to keep this to none blocking code.

	unsigned char UV_ADSwrite[6];
	unsigned char UV_ADSread[6];

	UV_ADSwrite[0] = 0x01; // channel info setting.

	UV_ADSwrite[2] = 0x83; //10000011 LSB


	// Run to adjust / set the PWM UV level CHECK that the hood is closed first, set to ZERO unless the hood is closed.

	if(UV_Control.setpoint > 0 && HAL_GPIO_ReadPin(Hood_Close1_GPIO_Port, Hood_Close1_Pin) && HAL_GPIO_ReadPin(Hood_Close2_GPIO_Port, Hood_Close2_Pin))
	{
		if(UV_CHN == 0)
		{
		//uv_dc = UV_PID_Set(&UV_Control, &UV_status);
		__HAL_TIM_SET_COMPARE(UV_PWM_TIM, UV_PWM_CH, UV_Control.setpoint);
		}
	}
	else
	{
		__HAL_TIM_SET_COMPARE(UV_PWM_TIM, UV_PWM_CH, 0);
	}

	switch(UV_reader_steps)
	{

	case(UV_send):

		if(UV_CHN == 0)
				{
					UV_ADSwrite[1] = 0x42; // select channel and start conversion // Try 0xC1
				}
		else if(UV_CHN == 1)
				{
					UV_ADSwrite[1] = 0x52; // select channel and start conversion // Try 0xD1
				}
		else if(UV_CHN == 2)
				{
					UV_ADSwrite[1] = 0x62; // select channel and start conversion // Try 0xE1
				}
		else if(UV_CHN == 3)
				{
					UV_ADSwrite[1] = 0x72; // select channel and start conversion // Try 0xF1
				}

		// Send the info and then move on to the next part
		HAL_I2C_Master_Transmit(&hi2c1, UV_ADDRESS << 1, UV_ADSwrite, 3, 100);

		// specify format and send data command
		UV_ADSwrite[0] = 0x00;
		HAL_I2C_Master_Transmit(&hi2c1, UV_ADDRESS << 1 , UV_ADSwrite, 1 ,100);

		UV_reader_steps = UV_wait; // go to next step

		UV_Wait = HAL_GetTick();

		break;

	case(UV_wait):
			// this needs to wait until 20mS has passed for conversion to work after change of MUX Reg in ADC
					if((HAL_GetTick() - UV_Wait) > 20)
					{
						UV_reader_steps = UV_read;
					}

		break;

	case(UV_read):
			// get the reading
			HAL_I2C_Master_Receive(&hi2c1, UV_ADDRESS <<1, UV_ADSread, 2, 100);


			UV_Data_Send.UV_Levels[UV_CHN] = (UV_ADSread[0] << 8 | UV_ADSread[1] );

			UV_reader_steps = UV_send;

			UV_CHN++; // go to the next channel.

			if(UV_CHN > 3) // loop back to the first channel.
			{
				UV_CHN = 0;

				if(UV_Send_Data)
				{
					// Function call to send UV data to Controller
				}
			}

		break;

	}


}