Diff: ADS1248.h

Revision:

0:e015f99b8dfb

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ADS1248.h	Wed Sep 17 08:20:38 2014 +0000
@@ -0,0 +1,134 @@
+#ifndef ADS1248_H
+#define ADS1248_H
+
+#include "mbed.h"
+/** ADS1248 class.
+ *  Used for read ADS1248/7/6 Temperature ADC
+ *
+ */  
+class ADS1248
+{
+    public:
+        /** Create ADS1248 instance
+        * @param SPI SPI bus to use
+        * @param cs pin to connect at CS input
+        * @param rdy pin connect at !rdy output
+        * @param start pin connect at start inpout (pullup if unused)
+        */
+        ADS1248(SPI& spi, PinName cs, PinName rdy, PinName start = NC);
+        
+        /** register name list of ADS1248
+        */
+        enum reg{
+            MUX0    = 0x00,
+            VBIAS   = 0x01,
+            MUX1    = 0x02,
+            SYS0    = 0x03,
+            OFC0    = 0x04,
+            OFC1    = 0x05,
+            OFC2    = 0x06,
+            FSC0    = 0x07,
+            FSC1    = 0x08,
+            FSC2    = 0x09,
+            IDAC0   = 0x0A,
+            IDAC1   = 0x0B,
+            GPIOCFG = 0x0C,
+            GPIODIR = 0x0D,
+            GPIODAT = 0x0E};
+        
+        /** commande list of ADS1248
+        */ 
+        enum cmd{
+            WAKEUP  = 0x00,
+            SLEEP   = 0x02,
+            SYNC    = 0x04,
+            RESET   = 0x06,
+            NOP     = 0xff,
+            RDATA   = 0x12,
+            RDATAC  = 0x14,
+            SDATAC  = 0x16,
+            RREG    = 0x20,
+            WREG    = 0x40,
+            SYSOCAL = 0x60,
+            SYSGCAL = 0x61,
+            SELFOCAL= 0x62};
+    
+        /** Access to output start pin
+        * @param en start pin state
+        */                  
+        void start(bool en);
+        
+        /** Wait ADS1248 to be ready (pooling method)
+        */     
+        void waitReady(void);
+        
+        /** Sleep cmd of ADS1248 (ask waitReady)
+        * @param en for wakeup or sleep
+        */       
+        void sleep(bool en);
+        
+        /** Synchronisation cmd of ADS1248 
+        */
+        void sync(void);
+        
+        /** Reset cmd of ADS1248
+        */
+        void reset(void);
+        
+        /** Read data when conversion was finished (ask waitReady)
+        * @return 24bit data 2's complement
+        */
+        int read(void);
+        
+        /** Ask read
+        * @return 24bit data 2's complement
+        */
+        operator int();
+        
+        /** Read ADS1248 register
+        * @param reg is register address
+        * @return register value
+        */
+        unsigned char readReg(unsigned char reg);
+        
+        /** Read ADS1248 registers
+        * @param reg is first register address
+        * @param buff pointer on buffer to write
+        * @param len lenght of data to read
+        */
+        void readReg(unsigned char reg, unsigned char *buff, int len);
+        
+        /** Write ADS1248 register
+        * @param reg is register address
+        * @param val value to write
+        */
+        void writeReg(unsigned char reg, unsigned char val);
+        
+        /** Write ADS1248 registers
+        * @param reg is first register address
+        * @param buff pointer on buffer to read
+        * @param len lenght of data to write
+        */
+        void writeReg(unsigned char reg, const unsigned char *buff, int len);
+        
+        /** System Offset Calibration cmd of ADS1248 (ask waitReady)
+        */
+        void systemOffsetCal(void);
+        
+        /** System Gain Calibration cmd of ADS1248 (ask waitReady)
+        */
+        void systemGainCal(void);
+        
+        /** Self Offset Calibration cmd of ADS1248 (ask waitReady)
+        */
+        void selfOffsetCal(void);
+        
+   
+    private:
+        SPI& _spi;
+        DigitalOut  _cs;
+        DigitalIn   _rdy;
+        DigitalOut  _start;
+};
+
+#endif