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@2:4b6ca4d9c0c7, 2019-08-21 (annotated)

Committer:
Eugene0469
Date:
Wed Aug 21 11:02:36 2019 +0000
Revision:
2:4b6ca4d9c0c7
Parent:
0:e5807af79fca
Child:
3:d9b97ff44d28
Reduces the number of operating modes to one(input multiplexer mode) while retaining the commented sections of code.

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 0:e5807af79fca 10
Eugene0469 2:4b6ca4d9c0c7 11 //#define DRTYPE 0 // 0 - readDataSync, 1 - readDataMux
Eugene0469 2:4b6ca4d9c0c7 12 //#define SINGLE_CHANNEL 0 //1 - single channel, 0 - multiple channel
Eugene0469 2:4b6ca4d9c0c7 13 #define NO_OF_SENSORS 4 // 1- 1 sensor, 2- 2 sensors, 3- 3 sensors, 4- 4 sensors
Eugene0469 0:e5807af79fca 14
Eugene0469 0:e5807af79fca 15 DigitalIn ndrdy = D10;
Eugene0469 0:e5807af79fca 16 DigitalOut cs = CHIP_SLCT;
Eugene0469 0:e5807af79fca 17
Eugene0469 0:e5807af79fca 18 Serial pc(USBTX, USBRX);
Eugene0469 0:e5807af79fca 19
Eugene0469 0:e5807af79fca 20 SPI spi(SPI_MOSI, SPI_MISO, SPI_SCLK);
Eugene0469 0:e5807af79fca 21 ADS1256 ads(&spi, &ndrdy, &cs);
Eugene0469 0:e5807af79fca 22
Eugene0469 0:e5807af79fca 23 //extern uint8_t ads.channel; /* The current channel*/
Eugene0469 0:e5807af79fca 24 int32_t ads_sum = 0;
Eugene0469 0:e5807af79fca 25
Eugene0469 2:4b6ca4d9c0c7 26 //#if SINGLE_CHANNEL
Eugene0469 2:4b6ca4d9c0c7 27 // /*
Eugene0469 2:4b6ca4d9c0c7 28 // @brief: Read Data from a single channel
Eugene0469 2:4b6ca4d9c0c7 29 // */
Eugene0469 2:4b6ca4d9c0c7 30 // void readDataSingleChannel()
Eugene0469 2:4b6ca4d9c0c7 31 // {
Eugene0469 2:4b6ca4d9c0c7 32 // ads.readSingleChannel();
Eugene0469 2:4b6ca4d9c0c7 33 // pc.printf("The value read is %d\n", ads.adcNow[ads.channel]); // Specifically for channel 0.
Eugene0469 2:4b6ca4d9c0c7 34 // wait_us(1000);
Eugene0469 2:4b6ca4d9c0c7 35 // }
Eugene0469 2:4b6ca4d9c0c7 36 //#else
Eugene0469 2:4b6ca4d9c0c7 37 /*
Eugene0469 2:4b6ca4d9c0c7 38 @brief: Read data from multiple channels
Eugene0469 2:4b6ca4d9c0c7 39 */
Eugene0469 2:4b6ca4d9c0c7 40 // #if !DRTYPE
Eugene0469 2:4b6ca4d9c0c7 41 // /*
Eugene0469 2:4b6ca4d9c0c7 42 // @brief: Settling time using Synchronization.
Eugene0469 2:4b6ca4d9c0c7 43 // */
Eugene0469 2:4b6ca4d9c0c7 44 // void readDataSync()
Eugene0469 2:4b6ca4d9c0c7 45 // {
Eugene0469 2:4b6ca4d9c0c7 46 // for(int i=ads.channel;i<CHANNEL_NUM;i++)
Eugene0469 2:4b6ca4d9c0c7 47 // {
Eugene0469 2:4b6ca4d9c0c7 48 // ads.channel = i;
Eugene0469 2:4b6ca4d9c0c7 49 // ads.waitDRDY();
Eugene0469 2:4b6ca4d9c0c7 50 // ads.isr();
Eugene0469 2:4b6ca4d9c0c7 51 // }
Eugene0469 2:4b6ca4d9c0c7 52 // ads.channel = 0;
Eugene0469 2:4b6ca4d9c0c7 53 // for (int i=0; i<CHANNEL_NUM; i++)
Eugene0469 2:4b6ca4d9c0c7 54 // {
Eugene0469 2:4b6ca4d9c0c7 55 // ads_sum+= ads.adcNow[i];
Eugene0469 2:4b6ca4d9c0c7 56 // }
Eugene0469 2:4b6ca4d9c0c7 57 // pc.printf("The total value read is %d\n", ads_sum);
Eugene0469 2:4b6ca4d9c0c7 58 // ads_sum=0;
Eugene0469 2:4b6ca4d9c0c7 59 // wait_us(1000);
Eugene0469 2:4b6ca4d9c0c7 60 // }
Eugene0469 2:4b6ca4d9c0c7 61 // #else
Eugene0469 2:4b6ca4d9c0c7 62 // /*
Eugene0469 2:4b6ca4d9c0c7 63 // @brief: Settling time using the Input Multiplexer.
Eugene0469 2:4b6ca4d9c0c7 64 // */
Eugene0469 2:4b6ca4d9c0c7 65 #if NO_OF_SENSORS == 1
Eugene0469 2:4b6ca4d9c0c7 66 void readDataMux()
Eugene0469 2:4b6ca4d9c0c7 67 {
Eugene0469 2:4b6ca4d9c0c7 68 uint8_t channel = 0;
Eugene0469 2:4b6ca4d9c0c7 69 ads.readDiffChannel(channel);
Eugene0469 0:e5807af79fca 70
Eugene0469 2:4b6ca4d9c0c7 71 for (int i=0; i<CHANNEL_NUM; i++)
Eugene0469 2:4b6ca4d9c0c7 72 {
Eugene0469 2:4b6ca4d9c0c7 73 ads_sum+= ads.adcNow[i];
Eugene0469 2:4b6ca4d9c0c7 74 }
Eugene0469 2:4b6ca4d9c0c7 75 }
Eugene0469 2:4b6ca4d9c0c7 76 #elif NO_OF_SENSORS == 2
Eugene0469 2:4b6ca4d9c0c7 77 void readDataMux()
Eugene0469 2:4b6ca4d9c0c7 78 {
Eugene0469 2:4b6ca4d9c0c7 79 uint8_t channel = 0;
Eugene0469 2:4b6ca4d9c0c7 80 while(channel < (CHANNEL_NUM-2))
Eugene0469 2:4b6ca4d9c0c7 81 {
Eugene0469 2:4b6ca4d9c0c7 82 ads.readDiffChannel(++channel);
Eugene0469 2:4b6ca4d9c0c7 83 }
Eugene0469 2:4b6ca4d9c0c7 84 channel = 0;
Eugene0469 2:4b6ca4d9c0c7 85 for (int i=0; i<CHANNEL_NUM; i++)
Eugene0469 2:4b6ca4d9c0c7 86 {
Eugene0469 2:4b6ca4d9c0c7 87 ads_sum+= ads.adcNow[i];
Eugene0469 2:4b6ca4d9c0c7 88 }
Eugene0469 2:4b6ca4d9c0c7 89 }
Eugene0469 2:4b6ca4d9c0c7 90 #elif NO_OF_SENSORS == 3
Eugene0469 2:4b6ca4d9c0c7 91 void readDataMux()
Eugene0469 0:e5807af79fca 92 {
Eugene0469 2:4b6ca4d9c0c7 93 uint8_t channel = 0;
Eugene0469 2:4b6ca4d9c0c7 94 while(channel < CHANNEL_NUM-1)
Eugene0469 0:e5807af79fca 95 {
Eugene0469 2:4b6ca4d9c0c7 96 ads.readDiffChannel(++channel);
Eugene0469 0:e5807af79fca 97 }
Eugene0469 2:4b6ca4d9c0c7 98 channel = 0;
Eugene0469 0:e5807af79fca 99 for (int i=0; i<CHANNEL_NUM; i++)
Eugene0469 0:e5807af79fca 100 {
Eugene0469 0:e5807af79fca 101 ads_sum+= ads.adcNow[i];
Eugene0469 0:e5807af79fca 102 }
Eugene0469 2:4b6ca4d9c0c7 103 }
Eugene0469 2:4b6ca4d9c0c7 104 #elif NO_OF_SENSORS == 4
Eugene0469 2:4b6ca4d9c0c7 105 void readDataMux()
Eugene0469 2:4b6ca4d9c0c7 106 {
Eugene0469 2:4b6ca4d9c0c7 107 uint8_t channel = 0;
Eugene0469 2:4b6ca4d9c0c7 108 while(channel < CHANNEL_NUM)
Eugene0469 2:4b6ca4d9c0c7 109 {
Eugene0469 2:4b6ca4d9c0c7 110 ads.readDiffChannel(++channel);
Eugene0469 2:4b6ca4d9c0c7 111 }
Eugene0469 2:4b6ca4d9c0c7 112 channel = 0;
Eugene0469 2:4b6ca4d9c0c7 113 for (int i=0; i<CHANNEL_NUM; i++)
Eugene0469 2:4b6ca4d9c0c7 114 {
Eugene0469 2:4b6ca4d9c0c7 115 ads_sum+= ads.adcNow[i];
Eugene0469 2:4b6ca4d9c0c7 116 }
Eugene0469 2:4b6ca4d9c0c7 117 }
Eugene0469 2:4b6ca4d9c0c7 118 #else
Eugene0469 2:4b6ca4d9c0c7 119 void readDataMux()
Eugene0469 2:4b6ca4d9c0c7 120 {
Eugene0469 2:4b6ca4d9c0c7 121 pc.printf("INVALID NUMBER OF SENSORS INITIALIZED\n");
Eugene0469 2:4b6ca4d9c0c7 122 }
Eugene0469 2:4b6ca4d9c0c7 123 #endif
Eugene0469 2:4b6ca4d9c0c7 124
Eugene0469 2:4b6ca4d9c0c7 125 // #endif
Eugene0469 2:4b6ca4d9c0c7 126 //#endif
Eugene0469 2:4b6ca4d9c0c7 127 void process(void)
Eugene0469 2:4b6ca4d9c0c7 128 {
Eugene0469 2:4b6ca4d9c0c7 129 // #if SINGLE_CHANNEL
Eugene0469 2:4b6ca4d9c0c7 130 // readDataSingleChannel();
Eugene0469 2:4b6ca4d9c0c7 131 // #else
Eugene0469 2:4b6ca4d9c0c7 132 // #if !DRTYPE
Eugene0469 2:4b6ca4d9c0c7 133 // readDataSync();
Eugene0469 2:4b6ca4d9c0c7 134 // #else
Eugene0469 2:4b6ca4d9c0c7 135 readDataMux();
Eugene0469 0:e5807af79fca 136 pc.printf("The total value read is %d\n", ads_sum);
Eugene0469 0:e5807af79fca 137 ads_sum=0;
Eugene0469 0:e5807af79fca 138 wait_us(1000);
Eugene0469 2:4b6ca4d9c0c7 139 // #endif
Eugene0469 2:4b6ca4d9c0c7 140 // #endif
Eugene0469 2:4b6ca4d9c0c7 141 pc.printf("The value in adcNow[0] is %d\n", ads.adcNow[0]);
Eugene0469 2:4b6ca4d9c0c7 142 pc.printf("The value in adcNow[1] is %d\n", ads.adcNow[1]);
Eugene0469 2:4b6ca4d9c0c7 143 pc.printf("The value in adcNow[2] is %d\n", ads.adcNow[2]);
Eugene0469 2:4b6ca4d9c0c7 144 pc.printf("The value in adcNow[3] is %d\n", ads.adcNow[3]);
Eugene0469 0:e5807af79fca 145 }
Eugene0469 0:e5807af79fca 146
Eugene0469 0:e5807af79fca 147 int main()
Eugene0469 0:e5807af79fca 148 {
Eugene0469 0:e5807af79fca 149 /* @brief Set the configuration parameters:
Eugene0469 0:e5807af79fca 150 channel == 0(0x01h),
Eugene0469 0:e5807af79fca 151 PGA gain == 64,
Eugene0469 0:e5807af79fca 152 Buffer == 1 (enabled),
Eugene0469 0:e5807af79fca 153 Datarate == 2.5SPS.
Eugene0469 0:e5807af79fca 154 Auto_calibration has also been enabled
Eugene0469 0:e5807af79fca 155 */
Eugene0469 0:e5807af79fca 156 ads.cfgADC();
Eugene0469 2:4b6ca4d9c0c7 157 pc.printf("Device configuration is successful\n");
Eugene0469 2:4b6ca4d9c0c7 158 ads.setDiffChannel(); // Redundancy feature just to ensure that the channel is set correctly.
Eugene0469 0:e5807af79fca 159 pc.printf("The set gain value is %d\n", ads.getGainVal());
Eugene0469 0:e5807af79fca 160
Eugene0469 0:e5807af79fca 161 /*TODO: Calibration*/
Eugene0469 0:e5807af79fca 162 ads.selfCal();
Eugene0469 0:e5807af79fca 163 ads.sysOffCal();
Eugene0469 0:e5807af79fca 164
Eugene0469 0:e5807af79fca 165 while(1)
Eugene0469 0:e5807af79fca 166 {
Eugene0469 2:4b6ca4d9c0c7 167 process();
Eugene0469 2:4b6ca4d9c0c7 168 wait_ms(500);
Eugene0469 0:e5807af79fca 169 }
Eugene0469 0:e5807af79fca 170 }