关于ADS1120驱动代码，寄存器配置

#include "ADS1220.h" void ADS1220SendByte(u8 Byte) { //HAL_SPI_Transmit(&hspi1,&Byte,1,10); SPI2_ReadWriteByte(Byte); } unsigned char ADS1220ReceiveByte() { unsigned char SData = 0xff ,Result = 0; Result = SPI2_ReadWriteByte(SData); //HAL_SPI_TransmitReceive(&hspi1,&SData,&Result,1,10); return Result; } /* ****************************************************************************** higher level functions */ void ADS1220ReadRegister(int StartAddress, int NumRegs, unsigned * pData) { int i; /* send the command byte */ ADS1220SendByte(ADS1220_CMD_RREG | (((StartAddress<<2) & 0x0c) |((NumRegs-1)&0x03))); /* get the register content */ for (i=0; i< NumRegs; i++) { *pData++ = ADS1220ReceiveByte(); } return; } void ADS1220WriteRegister(int StartAddress, int NumRegs, unsigned char * pData) { int i; /* send the command byte */ ADS1220SendByte(ADS1220_CMD_WREG | (((StartAddress<<2) & 0x0c) |((NumRegs-1)&0x03))); /* send the data bytes */ for (i=0; i< NumRegs; i++) { ADS1220SendByte(*pData++); } return; } void ADS1220SendResetCommand() { /* send the command byte */ ADS1220SendByte(ADS1220_CMD_RESET); return; } void ADS1220SendStartCommand() { /* send the command byte */ ADS1220SendByte(ADS1220_CMD_SYNC); return; } void ADS1220SendShutdownCommand() { /* send the command byte */ ADS1220SendByte(ADS1220_CMD_SHUTDOWN); return; } /* ADS1220 Initial Configuration */ unsigned int test[4]; void ADS1220Init(void) { uint8_t ch_cfg[4]={ADS1220_MUX_3_G|ADS1220_GAIN_1|ADS1220_PGA_BYPASS, ADS1220_CC|ADS1220_DR_45, ADS1220_VREF_SUPPLY|ADS1220_PSW_SW_OFF, ADS1220_IDAC1_OFF|ADS1220_IDAC2_OFF}; ADS1220SendResetCommand();//复位 delay_ms(100); ADS1220WriteRegister(ADS1220_0_REGISTER,4,ch_cfg);//配置4个寄存器 delay_ms(100); //ADS1220SendShutdownCommand(); ADS1220SendStartCommand(); } long ADS1220ReadData() { long Data; /* send the command byte */ ADS1220SendByte(ADS1220_CMD_RDATA); /* get the conversion result */ #ifdef ADS1120 Data = ADS1220ReceiveByte(); Data = (Data << 8) | ADS1220ReceiveByte(); /* sign extend data */ if (Data & 0x8000) Data |= 0xffff0000; #else Data = ADS1220ReceiveByte(); Data = (Data << 8) | ADS1220ReceiveByte(); Data = (Data << 8) | ADS1220ReceiveByte(); /* sign extend data */ if (Data & 0x800000) Data |= 0xff000000; #endif return Data; } //选择通道函数 void ADS1220_SelCh(uint8_t ch) { uint8_t cfg[2]={ADS1220_MUX_0_G|ADS1220_GAIN_1|ADS1220_PGA_BYPASS}; switch(ch) { case 0://选择通道0 cfg[0] = ADS1220_MUX_0_G|ADS1220_GAIN_1|ADS1220_PGA_BYPASS; ADS1220WriteRegister(ADS1220_0_REGISTER,1,cfg); break; case 1://选择通道1 cfg[0] = ADS1220_MUX_1_G|ADS1220_GAIN_1|ADS1220_PGA_BYPASS; ADS1220WriteRegister(ADS1220_0_REGISTER,1,cfg); break; case 2://选择通道2 cfg[0] = ADS1220_MUX_2_G|ADS1220_GAIN_1|ADS1220_PGA_BYPASS; ADS1220WriteRegister(ADS1220_0_REGISTER,1,cfg); break; case 3://选择通道3 cfg[0] = ADS1220_MUX_3_G|ADS1220_GAIN_1|ADS1220_PGA_BYPASS; ADS1220WriteRegister(ADS1220_0_REGISTER,1,cfg); break; } } __IO uint16_t ADS1220_Tick = 0; uint32_t temp,data; float Vin[4]; //循环读取4个通道 u32 ADS1220_GetData(void) { static uint8_t ads_ch = 3;//通道选择 //if(ADS1220_Tick<50)return; //ADS1220_Tick=0; delay_ms(100); //ADS1220ReadRegister(ADS1220_0_REGISTER,4,test); switch(ads_ch) { case 0://读取通道0 然后切换到通道1 temp = ADS1220ReadData(); Vin[0] = temp*2.048f/8388608;//转换为电压 单位V ads_ch = 1; ADS1220_SelCh(ads_ch); break; case 1://读取通道1 然后切换到通道2 temp = ADS1220ReadData(); Vin[1] = temp*2.048f/8388608;//转换为电压 单位V ads_ch = 2; ADS1220_SelCh(ads_ch); break; case 2://读取通道2 然后切换到通道3 temp = ADS1220ReadData(); Vin[2] = temp*2.048f/8388608; ads_ch = 3; ADS1220_SelCh(ads_ch); break; case 3://读取通道3 然后切换到通道0 temp = ADS1220ReadData(); Vin[3] = (temp*5/32767.0000)+0.0005; data = ((temp*5/32767.0000)+0.0005)*1000; //ads_ch = 0; ADS1220_SelCh(ads_ch); break; } return temp; }