Diff: PGA122_Driver.h

Revision:

0:4cb6d8393e9d

Child:

1:b3fee6ce395f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PGA122_Driver.h	Mon Jan 21 19:00:25 2019 +0000
@@ -0,0 +1,74 @@
+#ifndef PGA112_DRIVER_H
+#define PGA112_DRIVER_H
+#include "mbed.h"
+#define CMD_WRITE 0x2A
+
+#define GAIN_1    0x0
+#define GAIN_2    0x1
+#define GAIN_4    0x2
+#define GAIN_8    0x3
+#define GAIN_16   0x4
+#define GAIN_32   0x5
+#define GAIN_64   0x6
+#define GAIN_128  0x7
+
+#define CAL_1     0xC // Channel 12
+#define CAL_2     0xD // Channel 13
+#define CAL_3     0xE // Channel 14
+#define CAL_4     0xF // Channel 15
+#define VCAL_CH0  0x0 // channel 0
+#define CH_1      0x1 // channel 1
+
+
+/** This is library to drive the PGA112. Basic funcitons have been implemented.
+*
+*/
+
+class PGA112
+{
+public:
+  /** Create a PGA object
+  * This takes a pointer object of an SPI bus. Becareful, this is not thread safe
+  * and may cause hanging
+  *
+  *  @param SPI_BUS pointer to SPI object
+  *  @param Chip_Select chip select line for the PGA. pointer plz
+  */
+  PGA112(SPI *SPI_BUS, DigitalOut *Chip_Select);
+  /** This will set the gain for the PGA
+  *  Please only use binary gains.....1,2,4,8,16,32,64,128
+  *
+  * @param gain_set parameter to set gain, see comment for acceptable gain values
+  */
+  void set_gain(int gain_set);
+  /** Sets the channel selection
+  *  CAL_1     0xC // Channel 12  GND
+  *  CAL_2     0xD // Channel 13  0.9*Vcal
+  *  CAL_3     0xE // Channel 14  0.1*Vcal
+  *  CAL_4     0xF // Channel 15  Vref (2.5000 volts)
+  *  VCAL_CH0  0x0 // channel 0   Vcal (5.0000 volts)
+  *  CH_1      0x1 // channel 1
+  *
+  * @param channel_set the channel you want to select. See above table for values
+  */
+  void set_channel(int channel_set);
+  /** Sets the channel to CAL1 channel which is connected to GND
+  */
+  void set_CAL1();
+  /** Sets the channel to CAL2 channel which is connected to 0.9*Vcal (Vcal = 5)
+  */
+  void set_CAL2();
+  /** Sets the channel to CAL3 channel which is connected to 0.1*Vcal (Vcal = 5)
+  */
+  void set_CAL3();
+  /** Sets the channel to CAL4 channel which is connected to Vref (2.5V)
+  */
+  void set_CAL4();
+private:
+  SPI *PGA;
+  DigitalOut *CS;
+  int gain;
+  int channel;
+  char gain_chan;
+};
+#endif