ads1256.h

ads1256初始化请下载

// P3.3
#define ADS1256_SCLK    0x08
// P3.0
#define ADS1256_CS      0x00
// P3.1
#define ADS1256_DIN     0x02
// P3.2
#define ADS1256_DOUT    0x04

// P1.0
#define ADS1256_DRDY    0x01
// P1.5
#define ADS1256_LED     0x20
//P1.4
#define ADS1256_SYNC    0x10


#define ADS1256_NO_ERROR            0
#define ADS1256_TIMEOUT_WARNING  -10

// define commands
#define ADS1256_CMD_WAKEUP   0x00
#define ADS1256_CMD_RDATA    0x01
#define ADS1256_CMD_RDATAC   0x03
#define ADS1256_CMD_SDATAC   0x0f
#define ADS1256_CMD_RREG     0x10
#define ADS1256_CMD_WREG     0x50
#define ADS1256_CMD_SELFCAL  0xf0
#define ADS1256_CMD_SELFOCAL 0xf1
#define ADS1256_CMD_SELFGCAL 0xf2
#define ADS1256_CMD_SYSOCAL  0xf3
#define ADS1256_CMD_SYSGCAL  0xf4
#define ADS1256_CMD_SYNC     0xfc
#define ADS1256_CMD_STANDBY  0xfd
#define ADS1256_CMD_RESET    0xfe

// define the ADS1256 register values
#define ADS1256_STATUS       0x00  
#define ADS1256_MUX          0x01  
#define ADS1256_ADCON        0x02  
#define ADS1256_DRATE        0x03  
#define ADS1256_IO           0x04  
#define ADS1256_OFC0         0x05  
#define ADS1256_OFC1         0x06  
#define ADS1256_OFC2         0x07  
#define ADS1256_FSC0         0x08  
#define ADS1256_FSC1         0x09  
#define ADS1256_FSC2         0x0A


// define multiplexer codes
#define ADS1256_MUXP_AIN0   0x00
#define ADS1256_MUXP_AIN1   0x10
#define ADS1256_MUXP_AIN2   0x20
#define ADS1256_MUXP_AIN3   0x30
#define ADS1256_MUXP_AIN4   0x40
#define ADS1256_MUXP_AIN5   0x50
#define ADS1256_MUXP_AIN6   0x60
#define ADS1256_MUXP_AIN7   0x70
#define ADS1256_MUXP_AINCOM 0x80

#define ADS1256_MUXN_AIN0   0x00
#define ADS1256_MUXN_AIN1   0x01
#define ADS1256_MUXN_AIN2   0x02
#define ADS1256_MUXN_AIN3   0x03
#define ADS1256_MUXN_AIN4   0x04
#define ADS1256_MUXN_AIN5   0x05
#define ADS1256_MUXN_AIN6   0x06
#define ADS1256_MUXN_AIN7   0x07
#define ADS1256_MUXN_AINCOM 0x08  


// define gain codes
#define ADS1256_GAIN_1      0x00
#define ADS1256_GAIN_2      0x01
#define ADS1256_GAIN_4      0x02
#define ADS1256_GAIN_8      0x03
#define ADS1256_GAIN_16     0x04
#define ADS1256_GAIN_32     0x05
#define ADS1256_GAIN_64     0x06
//#define ADS1256_GAIN_64     0x07

//define drate codes
#define ADS1256_DRATE_30000SPS   0xF0
#define ADS1256_DRATE_15000SPS   0xE0
#define ADS1256_DRATE_7500SPS   0xD0
#define ADS1256_DRATE_3750SPS   0xC0
#define ADS1256_DRATE_2000SPS   0xB0
#define ADS1256_DRATE_1000SPS   0xA1
#define ADS1256_DRATE_500SPS    0x92
#define ADS1256_DRATE_100SPS    0x82
#define ADS1256_DRATE_60SPS     0x72
#define ADS1256_DRATE_50SPS     0x63
#define ADS1256_DRATE_30SPS     0x53
#define ADS1256_DRATE_25SPS     0x43
#define ADS1256_DRATE_15SPS     0x33
#define ADS1256_DRATE_10SPS     0x23
#define ADS1256_DRATE_5SPS      0x13
#define ADS1256_DRATE_2.5SPS    0x03


// define STATUS register bits
#define DRATE_BIT           0x08
#define ACAL_BIT            0x04
#define BUFEN_BIT           0x02
#define N_DRDY_BIT          0x01


// low level functions
int ADS1256Init(void);
int ADS1256WaitForDataReady(int Timeout);
void ADS1256AssertCS(int fAssert);
void LED(void);
void LE(void);
void ADS1256SendByte();
unsigned char ADS1241ReceiveByte();
char sliding_filter(char rData);


// higher level functions
//long ADS1256ReadData(int fWaitForDataReady);
int ADS1256ReadRegister(int StartAddress, int NumRegs, unsigned int * pData);
//int ADS1256WriteRegister(int StartAddress, int NumRegs, unsigned int *pData);
int ADS1256SendResetCommand(void);
int ADS1256SetChannel(int MuxCode);
int ADS1256SetGain(int GainCode);
void Init_CLK(void);
void ADS1256WriteRegister(unsigned char reg,unsigned char wdata);
unsigned long ADS1256ReadData();
unsigned long ADS1256_readch(unsigned char ch);