Diff: ADS1256.h

Revision:

0:897d3bb0accd

Child:

1:b9845bb1201b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ADS1256.h	Fri Dec 01 21:31:48 2017 +0000
@@ -0,0 +1,141 @@
+#ifndef __ADS1256_H__
+#define __ADS1256_H__
+
+#include "mbed.h"
+
+#define ADS1256_SPI_MODE 1
+#define DRATE_MAX 16
+#define DEBUG
+
+#define ADS1256_GAIN_1 0 /* GAIN   1 */
+#define ADS1256_GAIN_2 1  /*GAIN   2 */
+#define ADS1256_GAIN_4 2  /*GAIN   4 */
+#define ADS1256_GAIN_8 3  /*GAIN   8 */
+#define ADS1256_GAIN_16 4  /* GAIN  16 */
+#define ADS1256_GAIN_32 5  /*GAIN    32 */
+#define ADS1256_GAIN_64 6  /*GAIN    64 */
+
+
+#define ADS1256_30000SPS 15
+#define ADS1256_15000SPS 14
+#define ADS1256_7500SPS 13
+#define ADS1256_3750SPS 12
+#define ADS1256_2000SPS 11
+#define ADS1256_1000SPS 10
+#define ADS1256_500SPS 9
+#define ADS1256_100SPS 8
+#define ADS1256_60SPS 7
+#define ADS1256_50SPS 6
+#define ADS1256_30SPS 5
+#define ADS1256_25SPS 4
+#define ADS1256_15SPS 3
+#define ADS1256_10SPS 2
+#define ADS1256_5SPS 1
+#define ADS1256_2d5SPS 0
+
+
+class ADS1256
+{
+    SPI *spi;
+    DigitalOut *cs;
+    DigitalIn *nrdy;
+    
+    public:
+    ADS1256(SPI *, DigitalIn *, DigitalOut *);
+    uint8_t gain;
+    uint8_t dataRate;
+    int32_t adcNow[8];          /* ADC  Conversion value */
+    uint8_t channel;            /* The current channel*/
+    uint8_t prevChannel;        /* The previous channel --when muxing */
+    uint8_t scanMode;   /*Scanning mode,   0 = Single-ended input  8 channel; 1= Differential input  4 channels*/
+    uint8_t buffer_en;
+    uint32_t maxWaitDelay_us;
+        /* gain channelî */
+
+    
+    /* Sampling speed choice*/
+    /* 
+        11110000 = 30,000SPS (default)
+        11100000 = 15,000SPS
+        11010000 = 7,500SPS
+        11000000 = 3,750SPS
+        10110000 = 2,000SPS
+        10100001 = 1,000SPS
+        10010010 = 500SPS
+        10000010 = 100SPS
+        01110010 = 60SPS
+        01100011 = 50SPS
+        01010011 = 30SPS
+        01000011 = 25SPS
+        00110011 = 15SPS
+        00100011 = 10SPS
+        00010011 = 5SPS
+        00000011 = 2.5SPS
+    */
+
+    
+    /*Register definitions Table 23. Register Map --- ADS1256 datasheet Page 30*/
+    enum
+    {
+        /*Register address, followed by reset the default values */
+        REG_STATUS = 0, // x1H
+        REG_MUX    = 1, // 01H
+        REG_ADCON  = 2, // 20H
+        REG_DRATE  = 3, // F0H
+        REG_IO     = 4, // E0H
+        REG_OFC0   = 5, // xxH
+        REG_OFC1   = 6, // xxH
+        REG_OFC2   = 7, // xxH
+        REG_FSC0   = 8, // xxH
+        REG_FSC1   = 9, // xxH
+        REG_FSC2   = 10, // xxH
+    };
+    
+    /* Command definition£º TTable 24. Command Definitions --- ADS1256 datasheet Page 34 */
+    enum
+    {
+        CMD_WAKEUP  = 0x00, // Completes SYNC and Exits Standby Mode 0000  0000 (00h)
+        CMD_RDATA   = 0x01, // Read Data 0000  0001 (01h)
+        CMD_RDATAC  = 0x03, // Read Data Continuously 0000   0011 (03h)
+        CMD_SDATAC  = 0x0F, // Stop Read Data Continuously 0000   1111 (0Fh)
+        CMD_RREG    = 0x10, // Read from REG rrr 0001 rrrr (1xh)
+        CMD_WREG    = 0x50, // Write to REG rrr 0101 rrrr (5xh)
+        CMD_SELFCAL = 0xF0, // Offset and Gain Self-Calibration 1111    0000 (F0h)
+        CMD_SELFOCAL= 0xF1, // Offset Self-Calibration 1111    0001 (F1h)
+        CMD_SELFGCAL= 0xF2, // Gain Self-Calibration 1111    0010 (F2h)
+        CMD_SYSOCAL = 0xF3, // System Offset Calibration 1111   0011 (F3h)
+        CMD_SYSGCAL = 0xF4, // System Gain Calibration 1111    0100 (F4h)
+        CMD_SYNC    = 0xFC, // Synchronize the A/D Conversion 1111   1100 (FCh)
+        CMD_STANDBY = 0xFD, // Begin Standby Mode 1111   1101 (FDh)
+        CMD_RESET   = 0xFE, // Reset to Power-Up Values 1111   1110 (FEh)
+    };
+
+    
+
+
+    
+    //declare functions
+    void setSpi(void);
+    void cfgADC(void);
+    void delayDATA(void);
+    void writeReg(uint8_t _RegID, uint8_t _RegValue);
+    uint8_t readReg(uint8_t _RegID);
+    void writeCmd(uint8_t _cmd);
+    uint8_t readChipID(void);
+    void setChannel();
+    void setDiffChannel();
+    void waitDRDY(void);
+    void waitNDRDY(void);
+    int32_t readData(void);
+    uint8_t getGainVal(void);
+    void isr(void);
+    uint8_t scan(void);
+    uint16_t voltageConvert(float Vref, float voltage);
+    void readDiffChannel(uint8_t);
+    uint32_t getDataRateVal_us(uint8_t);
+    void getMaxWaitDelay_us(void);
+    void resync(void);
+
+};
+
+#endif
\ No newline at end of file