init.h

00001 #define byte unsigned char
00002 #define uint32 unsigned long
00003 #define uint16 unsigned short
00004 //#define debug 1
00005 #define BUF_SIZE  512
00006 
00007 /* Test specific constants  */
00008 #define CMD_ID         0x00    // return requested ID msg
00009 #define CMD_ADC        0x01    // trigger ADC sampling loop
00010 #define CMD_DAC        0x21    // control the DAC
00011 #define CMD_IDAC       0x22    // send DAC init command
00012 #define CMD_DAC_WR     0x23    // send DAC control command
00013 #define CMD_ADC_RD     0x81    // requested ADC values
00014 #define CMD_VSAMPL     0x82    // set DAC and sample adc values
00015 #define CMD_DAC_RD     0x83    // read DAC register
00016 
00017 // some more may be added
00018 
00019 #define mbed_SlaveAddr 0x22
00020 
00021 __packed struct ADC_CmdSet {
00022     byte        adc_reg_width;  /* 1 or 2 byte register address width         */
00023     byte        adc_samples;    /* Number of ADC samples per DAC step         */
00024     byte        slv_addr;       /* pmic slave address                         */
00025     uint16      man_trig_reg;   /* register address to control manual conv.   */
00026     byte        man_trig_val;   /* adc manual control value                   */
00027     byte        man_conv_mask;  /* adc mask to detect manuanl conv. done      */
00028     uint16      adc_lsb_reg;    /* register address for adc value readout     */
00029 };
00030 
00031 
00032 char INBUF[64]; // set to the biggest CmdSet
00033 
00034 // reserve data buffer unsigned int for adc values
00035 uint16 ADC_BUF[BUF_SIZE] __attribute__ ((section("AHBSRAM0")));
00036 
00037 DigitalOut led_1(LED1);
00038 DigitalOut cs0(p8);  // SYNC signal for DAC
00039 
00040 I2C mI2C(p28, p27);
00041 I2CSlave sI2C(p9, p10);
00042 SPI spi(p5, p6, p7); // mosi, miso, sclk
00043 #ifdef debug
00044     Serial pc(USBTX, USBRX);
00045 #endif
00046 
00047 char IDSTR[] = "mbed_DAC-ADC-control rev 1.1\n";
00048 // SDODIS=0, 2sC=1, DACTRI=0, OPGND=0, RBUF=1, RW=0, Control Register
00049 byte DAC_INIT_CMD [3] = {0x20, 0x00, 0x12}; // MSB first
00050 byte DAC_ZERO_CMD [3] = {0x18, 0x00, 0x00}; // 0V if VREFpos = 5V and VREFneg = -5V
00051 
00052 char BUSY = 0;
00053 char ADC_SAMPLES = 0;
00054 struct ADC_CmdSet ADC_CMD[1];
00055 
00056 
00057 void sample_adc();
00058 void dac_wr(byte *cmd);
00059 void set_dac(byte *dn_value);