#include?“spi.h“


//寫命令
static?void?ADS1248_WriteCmd（uint8_t?Cmd）??
{???
	
???AD_nCS_LOW;		//拉低片選線，使能SPI通信
				
		HAL_SPI_Transmit（&hspi1?&Cmd?1HAL_MAX_DELAY）;
????
		AD_nCS_HIGH;		//通信結束，拉高片選
????
}?



////讀寄存器
void?ADS1248_ReadReg（uint8_t?RegAddruint8_t?*Bufferuint8_t?Length）??
{??
????uint8_t?Cmd[2];??
		
????AD_nCS_LOW;
		
		AD_START_HIGH;		//在寫寄存器時嗎，需要將START拉高（不讓其進入睡眠模式）
		
	?
????Cmd[0]=ADC_CMD_RREG|RegAddr;??
????Cmd[1]=Length-1;??
	
		HAL_SPI_Transmit（&hspi1Cmd2HAL_MAX_DELAY）;		//發送命令
		
		
		HAL_SPI_Receive（&hspi1?Buffer?Length?HAL_MAX_DELAY）;		//接收寄存器數據
		
		Cmd[0]=ADC_CMD_NOP;??
????HAL_SPI_Transmit（&hspi1?Cmd1HAL_MAX_DELAY）;?	//最后在發送一個NOP，強制拉高DOUT
		
		
		AD_nCS_HIGH;
??
}


//寫寄存器
static??void?ADS1248_WriteReg（uint8_t?RegAddruint8_t?*Bufferuint8_t?Length）??
{??
????uint8_t?Cmd[2];??
		
????AD_nCS_LOW;
		
		AD_START_HIGH;		//在寫寄存器時嗎，需要將START拉高（不讓其進入睡眠模式）
???
?????HAL_Delay（20）;			//硬件延遲
	
????Cmd[0]=ADC_CMD_WREG|RegAddr;??
????Cmd[1]=Length-1;?
	
	??HAL_SPI_Transmit（&hspi1?Cmd?2HAL_MAX_DELAY）;?	//指定向指定寄存器寫入指定字節數據
	??HAL_SPI_Transmit（&hspi1?Buffer?LengthHAL_MAX_DELAY）;?	//發送數據字節
		
		?HAL_Delay（20）;			//硬件延遲
		
????AD_nCS_HIGH;?
		AD_START_LOW;		
		
}




//判斷忙狀態
?uint8_t?ADS1248_WaitBusy（uint32_t?Timeout）??
{??
????uint32_t?i?=?0;?
		AD_nCS_LOW;
		while（nAD_DRDY_STATE?>?0）
			{
				HAL_Delay（1）;
					i++;?
				if（i>Timeout）
					return?1;???

			}
	??
		AD_nCS_HIGH;
					
		return?0;
	
}?


//ADS1248系統校準??校準順序為：自偏移校準->偏移校準->增益校準?.
static?uint8_t?ADS1248_Calibrate（uint8_t?Gain）??
{??
		uint8_t?R=0;
????uint8_t?Cmd;??
????ADS1248_WriteReg（ADC_REG_SYS0&Gain1）;??????//?設置增益值、ADC輸出數據率
	
		Cmd=0x20;??	//0010?0000?
		ADS1248_WriteReg（ADC_REG_MUX1&Cmd1）;???????//?設置系統監測為自偏移測量?
		ADS1248_WriteCmd（ADC_CMD_SELFOCAL）;??????????//?自偏移校準??
		R?|=?ADS1248_WaitBusy（500）;????							?//?等待校準完成?
						
			
		Cmd=0x21;??//0010?0001
		ADS1248_WriteReg（ADC_REG_MUX1&Cmd1）;???????//?設置系統監測為偏移測量??
		ADS1248_WriteCmd（ADC_CMD_SYSOCAL）;???????????//?系統偏移校準??
		R?|=?ADS1248_WaitBusy（500）;???						??//?等待校準完成?
			
		
		Cmd=0x22;??
		ADS1248_WriteReg（ADC_REG_MUX1&Cmd1）;???????//?設置系統監測為增益測量??
		ADS1248_WriteCmd（ADC_CMD_SYSGCAL）;???????????//?系統增益校準??
		R?|=?ADS1248_WaitBusy（500）;????							?//?等待校準完成??
		
		return?R;
}


//復位ADS1248
?void?ADS1248_Reset（）
{
	??
	??AD_nCS_HIGH;
	??AD_START_HIGH;		//???為什么不是置低
		
		nADRST_LOW;				//置低nADRST，復位ADS1248
		HAL_Delay（20）;
		nADRST_HIGH;
		HAL_Delay（20）;
??
}




//ADS1248初始化
void?ADS1248_Init（void）??
{??
		uint8_t?Cmd;
		uint8_t?Gain;
		
		ADS1248_Reset（）;??																	?//系統復位
		
		HAL_Delay（100）;	
		
		Gain?=?ADC_GAIN_16|ADC_SPS_20;
	
		
		//初始化MUX0多路復用控制寄存器
		Cmd?=?0x17		;										//00?010?111Bit7-6:傳感器電流源檢測不使用，Bit5-3:正輸入為AIN2，Bit2-0:負輸入為AIN7		
		ADS1248_WriteReg（ADC_REG_MUX0&Cmd1）;?
	
		Cmd=0x20?;//0?01?00?000
		ADS1248_WriteRe

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-06-10?19:59??ADS1248驅動源碼\
?????文件????????5044??2018-06-10?19:48??ADS1248驅動源碼\spi.c
?????文件????????3609??2018-06-08?09:14??ADS1248驅動源碼\spi.h