Eugene Mwangi / Mbed 2 deprecated ads1256-test-program

This is a test program for the ADS1256 ADC transducer together with the DISCO-L475G STM32 board.

Dependencies:   mbed ADS1256

main.cpp@4:8a130c60169b, 2019-08-21 (annotated)

Committer:
Eugene0469
Date:
Wed Aug 21 11:07:25 2019 +0000
Revision:
4:8a130c60169b
Parent:
3:d9b97ff44d28 
Merges the branches of my local repository

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Eugene0469 0:e5807af79fca 1 #include "mbed.h"
Eugene0469 0:e5807af79fca 2 #include "ADS1256.h"
Eugene0469 0:e5807af79fca 3
Eugene0469 0:e5807af79fca 4 #define SPI_MOSI D11
Eugene0469 0:e5807af79fca 5 #define SPI_MISO D12
Eugene0469 0:e5807af79fca 6 #define SPI_SCLK D13
Eugene0469 0:e5807af79fca 7 #define CHIP_SLCT D9
Eugene0469 0:e5807af79fca 8 #define CHANNEL_NUM 4
Eugene0469 0:e5807af79fca 9
Eugene0469 2:4b6ca4d9c0c7 10 #define NO_OF_SENSORS 4 // 1- 1 sensor, 2- 2 sensors, 3- 3 sensors, 4- 4 sensors
Eugene0469 0:e5807af79fca 11
Eugene0469 0:e5807af79fca 12 DigitalIn ndrdy = D10;
Eugene0469 0:e5807af79fca 13 DigitalOut cs = CHIP_SLCT;
Eugene0469 0:e5807af79fca 14
Eugene0469 0:e5807af79fca 15 Serial pc(USBTX, USBRX);
Eugene0469 0:e5807af79fca 16
Eugene0469 0:e5807af79fca 17 SPI spi(SPI_MOSI, SPI_MISO, SPI_SCLK);
Eugene0469 0:e5807af79fca 18 ADS1256 ads(&spi, &ndrdy, &cs);
Eugene0469 0:e5807af79fca 19
Eugene0469 0:e5807af79fca 20 int32_t ads_sum = 0;
Eugene0469 0:e5807af79fca 21
Eugene0469 3:d9b97ff44d28 22 /*
Eugene0469 3:d9b97ff44d28 23 @brief: Settling time using the Input Multiplexer.
Eugene0469 3:d9b97ff44d28 24 */
Eugene0469 2:4b6ca4d9c0c7 25 #if NO_OF_SENSORS == 1
Eugene0469 2:4b6ca4d9c0c7 26 void readDataMux()
Eugene0469 2:4b6ca4d9c0c7 27 {
Eugene0469 2:4b6ca4d9c0c7 28 uint8_t channel = 0;
Eugene0469 2:4b6ca4d9c0c7 29 ads.readDiffChannel(channel);
Eugene0469 0:e5807af79fca 30
Eugene0469 2:4b6ca4d9c0c7 31 for (int i=0; i<CHANNEL_NUM; i++)
Eugene0469 2:4b6ca4d9c0c7 32 {
Eugene0469 2:4b6ca4d9c0c7 33 ads_sum+= ads.adcNow[i];
Eugene0469 2:4b6ca4d9c0c7 34 }
Eugene0469 2:4b6ca4d9c0c7 35 }
Eugene0469 2:4b6ca4d9c0c7 36 #elif NO_OF_SENSORS == 2
Eugene0469 2:4b6ca4d9c0c7 37 void readDataMux()
Eugene0469 2:4b6ca4d9c0c7 38 {
Eugene0469 2:4b6ca4d9c0c7 39 uint8_t channel = 0;
Eugene0469 2:4b6ca4d9c0c7 40 while(channel < (CHANNEL_NUM-2))
Eugene0469 2:4b6ca4d9c0c7 41 {
Eugene0469 2:4b6ca4d9c0c7 42 ads.readDiffChannel(++channel);
Eugene0469 2:4b6ca4d9c0c7 43 }
Eugene0469 2:4b6ca4d9c0c7 44 channel = 0;
Eugene0469 2:4b6ca4d9c0c7 45 for (int i=0; i<CHANNEL_NUM; i++)
Eugene0469 2:4b6ca4d9c0c7 46 {
Eugene0469 2:4b6ca4d9c0c7 47 ads_sum+= ads.adcNow[i];
Eugene0469 2:4b6ca4d9c0c7 48 }
Eugene0469 2:4b6ca4d9c0c7 49 }
Eugene0469 2:4b6ca4d9c0c7 50 #elif NO_OF_SENSORS == 3
Eugene0469 2:4b6ca4d9c0c7 51 void readDataMux()
Eugene0469 0:e5807af79fca 52 {
Eugene0469 2:4b6ca4d9c0c7 53 uint8_t channel = 0;
Eugene0469 2:4b6ca4d9c0c7 54 while(channel < CHANNEL_NUM-1)
Eugene0469 0:e5807af79fca 55 {
Eugene0469 2:4b6ca4d9c0c7 56 ads.readDiffChannel(++channel);
Eugene0469 0:e5807af79fca 57 }
Eugene0469 2:4b6ca4d9c0c7 58 channel = 0;
Eugene0469 0:e5807af79fca 59 for (int i=0; i<CHANNEL_NUM; i++)
Eugene0469 0:e5807af79fca 60 {
Eugene0469 0:e5807af79fca 61 ads_sum+= ads.adcNow[i];
Eugene0469 0:e5807af79fca 62 }
Eugene0469 2:4b6ca4d9c0c7 63 }
Eugene0469 2:4b6ca4d9c0c7 64 #elif NO_OF_SENSORS == 4
Eugene0469 2:4b6ca4d9c0c7 65 void readDataMux()
Eugene0469 2:4b6ca4d9c0c7 66 {
Eugene0469 2:4b6ca4d9c0c7 67 uint8_t channel = 0;
Eugene0469 2:4b6ca4d9c0c7 68 while(channel < CHANNEL_NUM)
Eugene0469 2:4b6ca4d9c0c7 69 {
Eugene0469 2:4b6ca4d9c0c7 70 ads.readDiffChannel(++channel);
Eugene0469 2:4b6ca4d9c0c7 71 }
Eugene0469 2:4b6ca4d9c0c7 72 channel = 0;
Eugene0469 2:4b6ca4d9c0c7 73 for (int i=0; i<CHANNEL_NUM; i++)
Eugene0469 2:4b6ca4d9c0c7 74 {
Eugene0469 2:4b6ca4d9c0c7 75 ads_sum+= ads.adcNow[i];
Eugene0469 2:4b6ca4d9c0c7 76 }
Eugene0469 2:4b6ca4d9c0c7 77 }
Eugene0469 2:4b6ca4d9c0c7 78 #else
Eugene0469 2:4b6ca4d9c0c7 79 void readDataMux()
Eugene0469 2:4b6ca4d9c0c7 80 {
Eugene0469 2:4b6ca4d9c0c7 81 pc.printf("INVALID NUMBER OF SENSORS INITIALIZED\n");
Eugene0469 2:4b6ca4d9c0c7 82 }
Eugene0469 2:4b6ca4d9c0c7 83 #endif
Eugene0469 3:d9b97ff44d28 84
Eugene0469 2:4b6ca4d9c0c7 85 void process(void)
Eugene0469 2:4b6ca4d9c0c7 86 {
Eugene0469 3:d9b97ff44d28 87
Eugene0469 2:4b6ca4d9c0c7 88 readDataMux();
Eugene0469 0:e5807af79fca 89 pc.printf("The total value read is %d\n", ads_sum);
Eugene0469 0:e5807af79fca 90 ads_sum=0;
Eugene0469 0:e5807af79fca 91 wait_us(1000);
Eugene0469 3:d9b97ff44d28 92
Eugene0469 2:4b6ca4d9c0c7 93 pc.printf("The value in adcNow[0] is %d\n", ads.adcNow[0]);
Eugene0469 2:4b6ca4d9c0c7 94 pc.printf("The value in adcNow[1] is %d\n", ads.adcNow[1]);
Eugene0469 2:4b6ca4d9c0c7 95 pc.printf("The value in adcNow[2] is %d\n", ads.adcNow[2]);
Eugene0469 2:4b6ca4d9c0c7 96 pc.printf("The value in adcNow[3] is %d\n", ads.adcNow[3]);
Eugene0469 0:e5807af79fca 97 }
Eugene0469 0:e5807af79fca 98
Eugene0469 0:e5807af79fca 99 int main()
Eugene0469 0:e5807af79fca 100 {
Eugene0469 0:e5807af79fca 101 /* @brief Set the configuration parameters:
Eugene0469 0:e5807af79fca 102 channel == 0(0x01h),
Eugene0469 0:e5807af79fca 103 PGA gain == 64,
Eugene0469 0:e5807af79fca 104 Buffer == 1 (enabled),
Eugene0469 0:e5807af79fca 105 Datarate == 2.5SPS.
Eugene0469 0:e5807af79fca 106 Auto_calibration has also been enabled
Eugene0469 0:e5807af79fca 107 */
Eugene0469 0:e5807af79fca 108 ads.cfgADC();
Eugene0469 2:4b6ca4d9c0c7 109 pc.printf("Device configuration is successful\n");
Eugene0469 2:4b6ca4d9c0c7 110 ads.setDiffChannel(); // Redundancy feature just to ensure that the channel is set correctly.
Eugene0469 0:e5807af79fca 111 pc.printf("The set gain value is %d\n", ads.getGainVal());
Eugene0469 0:e5807af79fca 112
Eugene0469 0:e5807af79fca 113 /*TODO: Calibration*/
Eugene0469 0:e5807af79fca 114 ads.selfCal();
Eugene0469 0:e5807af79fca 115 ads.sysOffCal();
Eugene0469 0:e5807af79fca 116
Eugene0469 0:e5807af79fca 117 while(1)
Eugene0469 0:e5807af79fca 118 {
Eugene0469 2:4b6ca4d9c0c7 119 process();
Eugene0469 2:4b6ca4d9c0c7 120 wait_ms(500);
Eugene0469 0:e5807af79fca 121 }
Eugene0469 0:e5807af79fca 122 }