Diff: AD5235.h

Revision:

0:6fed6c6c82b4

diff -r 000000000000 -r 6fed6c6c82b4 AD5235.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/AD5235.h	Tue Jul 26 10:49:57 2016 +0000
@@ -0,0 +1,54 @@
+#ifndef AD5235_H
+#define AD5235_H
+ 
+#include "mbed.h"
+//Data Sheet http://www.analog.com/media/en/technical-documentation/data-sheets/AD5235.pdf
+
+//Control Registers
+#define CMD_NOP 0x00 //0- Do nothing
+    //EEMEM No.-Address-----EEMEM Content for …
+    //1         0000        RDAC1
+    //2         0001        RDAC2
+    //3         0010        USER1
+    //4         0011        USER2
+    //…         …           …
+    //15        1110        USER13
+    //16        1111        RAB1 tolerance
+
+    //Instruction 3 writes two data bytes (16 bits of data) to EEMEM.
+    //In the case of Address 0 and Address 1, only the last 10 bits
+    //are valid for wiper position setting.
+    //Basicaly it is CMD_USER2MEM + User mem address + user = B0011A3A2A1A0 + user
+    //  A3  A2  A1  A0  
+    //  0   0   0   0   RDAC1
+    //  0   0   0   1   RDAC2
+    //  1   1   1   1   Tolerance   Read Only
+
+class AD5235 {
+    SPI& spi;
+    DigitalOut cs;    
+public:
+    AD5235(SPI& _spi, PinName _cs);
+    void storeEEMEM2RDAC(uint8_t w);//1 - Restore EEMEM (A0) contents to RDAC (A0) register. See Table 16.
+    void storeRDAC2EEMEM(uint8_t w);//2 - Store wiper setting. Store RDAC (A0) setting to EEMEM (A0). See Table 15. - Use a delay of 50ms!!!
+    void setEEMEM(uint8_t w, uint16_t v);//3 - Store contents of Serial Register Data Byte 0 and Serial Register Data Bytes 1 (total 16 bits) to EEMEM (ADDR). See Table 18.- Use a delay of 50ms!!!/RDAC1 is 0, RDAC2 is 1, User1 is 2....User13 is 14
+    void stepDown6Db(uint8_t w);//4 - Decrement by 6 dB. Right-shift contents of RDAC (A0) register, stop at all 0s.
+    void stepDownAll6Db(void);//5 - Decrement all by 6 dB. Right-shift contents of all RDAC registers, stop at all 0s.
+    void stepDown1(uint8_t w);//6 - Decrement contents of RDAC (A0) by 1, stop at all 0s.
+    void stepDown1All(void);//7 - Decrement contents of all RDAC registers by 1, stop at all 0s.
+    void refreshAllRDAC(void);//8 - Reset. Refresh all RDACs with their corresponding EEMEM previously stored values. - Use a delay of 30us!!!
+    uint16_t getEEMEM(uint8_t w);//9 - Read contents of EEMEM (ADDR) from SDO output in the next frame. See Table 19. - Use a delay of 30us!!!
+    uint16_t getWiper(uint8_t w);//10 - Read RDAC wiper setting from SDO output in the next frame. See Table 20. - Use a delay of 30us!!!
+    void setWiper(uint8_t w, uint16_t v);//11 - Write contents of Serial Register Data Byte 0 and Serial Register Data Byte 1 (total 10 bits) to RDAC (A0). See Table 14.
+    void stepUp6Db(uint8_t w);//12 - Increment by 6 dB: Left-shift contents of RDAC (A0),stop at all 1s. See Table 17.
+    void stepUpAll6Db(void);//13 - Increment all by 6 dB. Left-shift contents of all RDAC registers, stop at all 1s.
+    void stepUp1(uint8_t w);//14 - Increment contents of RDAC (A0) by 1, stop at all 1s. See Table 15.
+    void stepUp1All(void);//15 - Increment contents of all RDAC registers by 1, stop at all 1s.
+    void repeatCMD(void);//16 - See page 21 in manual Another subtle feature of the AD5235 is that a subsequent CS strobe, withoutclock and data, repeats a previous command
+    float getTolerance(void);
+private:  
+uint16_t _reply;
+PinName _CS_pin;
+uint16_t transferData(uint8_t cmd, uint16_t val);
+};
+#endif
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