ADS1120.rar_ADS1120驱动_TI_ads1120_ads1120.c_ads1120程序

/************************************************************************ * @device MSP430F169 * @auther Qiyan Ke * @brief drivers for ADS1120 * @date 2014.7.7 ********************************************************************** ACLK=32.768KHz MCLK=8MHz SMCLK=4MHz ***********************************************************************/ #include <msp430x16x.h> #include "ADS1120.h" #define RESET 0X06 #define START 0X08 #define POWERDOWN 0X02 #define RDATA 0X10 #define RREG 0X20 #define WREG 0X40 #define PXOUT P1OUT #define PXIN P1IN #define PXDIR P1DIR #define SCLK_L PXOUT &= ~BIT0 #define SCLK_H PXOUT |= BIT0 #define CS_L PXOUT &= ~BIT1 #define CS_H PXOUT |= BIT1 #define DRDY_IN PXIN&BIT2 #define DOUT PXIN&BIT3 #define DIN_L PXOUT &= ~BIT4 #define DIN_H PXOUT |= BIT4 #define uchar unsigned char #define uint unsigned int unsigned char Init_Config[4],channel0[8],channel1[8],channel2[8],channel3[8]; unsigned char i; //extern unsigned int Result; //unsigned int Result; /*************************************************************************** * Function Name: ADS1120_Init() * Purpose: ADS120 initialize * Params : * *************************************************************************/ void ADS1120_Init(void) { PXDIR |= BIT0 + BIT1 + BIT4; PXDIR &= ~(BIT2 + BIT3); CS_H; SCLK_L; ADReset(); } /*************************************************************************** * Function Name: WriteOneByte(unsigned char command) * Purpose: write one byte to ADS1120 * Params : * *************************************************************************/ void WriteOneByte(unsigned char command) { unsigned char i; for(i = 0; i < 8;i++) { if(command&0x80) DIN_H; else DIN_L; command <<= 1; SCLK_H; SCLK_L; } } /*************************************************************************** * Function Name: ReadOneByte() * Purpose: read one byte from ADS1120 * Params : result * *************************************************************************/ unsigned char ReadOneByte(void) { unsigned char result,i; SCLK_L; for(i = 0;i<8; i++) { SCLK_H; result <<= 0x01; if(DOUT) result |= 0X01; SCLK_L; } return result; } /*************************************************************************** * Function Name: ReadData() * Purpose: read data from ADS1120 * Params : result 0~65535 * *************************************************************************/ unsigned int ReadData(void) { unsigned int result; CS_L; WriteOneByte(RDATA); result = ReadOneByte(); result = (result<<8) | ReadOneByte(); CS_H; return result; } /*************************************************************************** * Function Name: ADReset() * Purpose: reset ADS1120 * Params : * *************************************************************************/ void ADReset(void) { CS_L; WriteOneByte(RESET); CS_H; } /*************************************************************************** * Function Name: ADPowerDown() * Purpose: * Params : * *************************************************************************/ void ADPowerDown(void) { CS_L; WriteOneByte(POWERDOWN); CS_H; } /*************************************************************************** * Function Name: ADStartConversion() * Purpose: start conversion * Params : * *************************************************************************/ void ADStartConversion(void) { CS_L; WriteOneByte(START); CS_H; } /*************************************************************************** * Function Name: ReadRegister() * Purpose: read data from register * Params : data * *************************************************************************/ void ReadRegister(void) { unsigned char i; unsigned long Data; CS_L; WriteOneByte(RREG|0x03); // get the register content for (i=0; i< 4; i++) { Data += ReadOneByte(); } CS_H; return; } /*************************************************************************** * Function Name: WriteRegister(unsigned char StartAddress, unsigned char NumRegs, unsigned char * pData) * Purpose: write data to register * steps: 1.write address 2.write data * Params NumRegs-----the numbers of register *************************************************************************/ void WriteRegister(unsigned char StartAddress, unsigned char NumRegs, unsigned char * pData) { unsigned char i; CS_L; // send the command byte WriteOneByte(WREG | (((StartAddress<<2) & 0x0c) |((NumRegs-1)&0x03))); // send the data bytes for (i=0; i< NumRegs; i++) { WriteOneByte(*pData); pData++; } CS_H; return; } /*************************************************************************** * Function Name: CofigAD(unsigned char channel) * Purpose: set the sampling channel * Params : * *************************************************************************/ void CofigAD(unsigned char channel) { switch(channel) { case 0: Init_Config[0] = 0x81; break; case 1: Init_Config[0] = 0x91; break; case 2: Init_Config[0] = 0xA1; break; case 3: Init_Config[0] = 0xB1; break; } Init_Config[1] = 0X00;//Init_Config[1] = 0XC0; Init_Config[2] = 0X50;//Init_Config[2] = 0X40; Init_Config[3] = 0X00; WriteRegister(0x00,0x04,Init_Config); ReadRegister(); } /*************************************************************************** * Function Name: SetChannelPGA(uchar channel, uchar gain) * Purpose: set the sampling channel and the gain * Params : * *************************************************************************/ void SetChannelPGA(uchar channel, uchar gain) { switch(channel) { case 0: if(gain==1) channel0[0] = 0x81; if(gain==2) channel0[1] = 0x83; if(gain==4) channel0[2] = 0x85; if(gain==8) channel0[3] = 0x87; if(gain==16) channel0[4] = 0x89; if(gain==32) channel0[5] = 0x8B; if(gain==64) channel0[6] = 0x8D; if(gain==128) channel0[7] = 0x8F; break; case 1: if(gain==1) channel1[0] = 0x91; if(gain==2) channel1[1] = 0x93; if(gain==4) channel1[2] = 0x95; if(gain==8) channel1[3] = 0x97; if(gain==16) channel1[4] = 0x99; if(gain==32) channel1[5] = 0x9B; if(gain==64) channel1[6] = 0x9D; if(gain==128) channel0[7] = 0x9F; break; case 2: Init_Config[0] = 0xA1; break; case 3: Init_Config[0] = 0xB1; break; } } /*************************************************************************** * Function Name: GetAD(unsigned char channel) * Purpose: get the result * Params : Result 0~65535 * *************************************************************************/ unsigned int GetAD(unsigned char channel) { unsigned int Result; CofigAD(channel); ADStartConversion(); while(DRDY_IN); Result = ReadData(); ADPowerDown(); return Result; } /*************************************************************************** * Function Name: GetAD(unsigned ch