ADC124S051驱动代码（HAL库）—4通道数据读取(有部分注释)

#include "ADC124S051.h"
#include "stm32f1xx_hal.h"
#include "define.h"
#include "delay.h"

uint32_t *ADC_read_multiple_channel(uint8_t chipselcet)    //这个参数片选，我的板子上有多个ADC所以要有个片选
	
	static uint32_t value_array[NUMBER_OF_CHANNEL] = { 0 };
	
	uint8_t i = 0,j=0;
	uint8_t channel1 = 0B00000000;
	uint8_t channel2 = 0B00001000;
	uint8_t channel3 = 0B00010000;
	uint8_t channel4 = 0B00011000;
	
	uint32_t data1 = 0;
	uint32_t data2 = 0;
	uint32_t data3 = 0;
	uint32_t data4 = 0;
	
	HAL_GPIO_WritePin(GPIOB, SCLK, 0);
	HAL_GPIO_WritePin(GPIOA, chipselcet, 0);
	delay_us(1);
	
	for (j = 0; j < 4; j++)
	{
		switch (j)
		{
		case 0:
			for (int i = 0; i < 16; i++)
			{
				HAL_GPIO_WritePin(GPIOB, DATAOUT, (channel1 & 0x80) >> 7);  	//写入ADC control register
				channel1 = channel1 << 1;
				HAL_GPIO_WritePin(GPIOB, SCLK, 1);
				delay_us(1);
		
				if ((i >= 4) && (i <= 15))	//从SCLK的第5个sclk开始读数据
					{
						if (HAL_GPIO_ReadPin(GPIOB, DATAIN))	//如果读到的状态是1
							data1 |= (1 << (15 - i));
					}
				HAL_GPIO_WritePin(GPIOB, SCLK, 0);
				delay_us(1);
			}
			break;
		case 1:
			for (int i = 0; i < 16; i++)
			{
				HAL_GPIO_WritePin(GPIOB, DATAOUT, (channel2 & 0x80) >> 7);   	//写入ADC control register
				channel2 = channel2 << 1;
				HAL_GPIO_WritePin(GPIOB, SCLK, 1);
				delay_us(1);
		
				if ((i >= 4) && (i <= 15))	//从SCLK的第5个sclk开始读数据
					{
						if (HAL_GPIO_ReadPin(GPIOB, DATAIN))	//如果读到的状态是1
							data2 |= (1 << (15 - i));
					}
				HAL_GPIO_WritePin(GPIOB, SCLK, 0);
				delay_us(1);
			}
			break;
		case 2:
			for (int i = 0; i < 16; i++)
			{
				HAL_GPIO_WritePin(GPIOB, DATAOUT, (channel3 & 0x80) >> 7);    	//写入ADC control register
				channel3 = channel3 << 1;
				HAL_GPIO_WritePin(GPIOB, SCLK, 1);
				delay_us(1);
		
				if ((i >= 4) && (i <= 15))	//从SCLK的第5个sclk开始读数据
					{
						if (HAL_GPIO_ReadPin(GPIOB, DATAIN))	//如果读到的状态是1
							data3 |= (1 << (15 - i));
					}
				HAL_GPIO_WritePin(GPIOB, SCLK, 0);
				delay_us(1);
			}
			break;
		case 3:
			for (int i = 0; i < 16; i++)
			{
				HAL_GPIO_WritePin(GPIOB, DATAOUT, (channel4 & 0x80) >> 7);    	//写入ADC control register
				channel4 = channel4 << 1;
				HAL_GPIO_WritePin(GPIOB, SCLK, 1);
				delay_us(1);
		
				if ((i >= 4) && (i <= 15))	//从SCLK的第5个sclk开始读数据
					{
						if (HAL_GPIO_ReadPin(GPIOB, DATAIN))	//如果读到的状态是1
							data4 |= (1 << (15 - i));
					}
				HAL_GPIO_WritePin(GPIOB, SCLK, 0);
				delay_us(1);
			}
			break;
				
		default:
			break;
		}
	}
	HAL_GPIO_WritePin(GPIOA, chipselcet, 1);
	value_array[0] = data2;  //IN1
	value_array[1] = data3;	//IN2	
	value_array[2] = data4;	//IN3	
	value_array[3] = data1;	//IN4  
	return value_array;
}