The Technology Partnership / Mbed 2 deprecated MEMSPCR_Control_Program_AD_Logging_Sync

ADC logging with demo drive board for calibration ADC read synchronised with heater on time

Dependencies:   mbed MODSERIAL FastPWM ADS8568_ADC

main.cpp@31:d459d6c38e78, 2019-11-11 (annotated)

Committer:
justinbuckland
Date:
Mon Nov 11 08:30:57 2019 +0000
Revision:
31:d459d6c38e78
Parent:
30:d2b897a07f51 
update board 2 UID

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AlexStokoe 0:362148ad8f6f 1 #include "mbed.h"
justinbuckland 16:2c563709cf09 2 #include "ADS8568_ADC.h"
justinbuckland 25:f507cfd50fcc 3 // #include "FastPWM.h"
justinbuckland 16:2c563709cf09 4 #include "MODSERIAL.h"
AlexStokoe 0:362148ad8f6f 5
justinbuckland 25:f507cfd50fcc 6 #define MEAS_DELAY 50 // measurement delay after turning on FET (us)
justinbuckland 25:f507cfd50fcc 7 #define LOG_INTERVAL 1000 // log file interval (ms)
justinbuckland 16:2c563709cf09 8 #define START_DELAY 1000 // pause for startup (ms)
justinbuckland 22:aba3ee6df08e 9 #define N_STEPS 100
justinbuckland 16:2c563709cf09 10 #define BUFFER_SIZE 4096
AlexStokoe 0:362148ad8f6f 11
justinbuckland 17:25831977b98e 12 //UID lookup address and pointer
justinbuckland 17:25831977b98e 13 #define UID_ADDR 0x1FFF7A10
justinbuckland 17:25831977b98e 14 unsigned long *uid = (unsigned long *) UID_ADDR;
justinbuckland 17:25831977b98e 15
justinbuckland 17:25831977b98e 16 //UID and drive board calibration table
justinbuckland 17:25831977b98e 17 #define UID_TABLE_LENGTH 4
justinbuckland 17:25831977b98e 18
justinbuckland 17:25831977b98e 19 int drive_board_serial_number[UID_TABLE_LENGTH] =
justinbuckland 17:25831977b98e 20 {1,
justinbuckland 17:25831977b98e 21 2,
justinbuckland 17:25831977b98e 22 3,
justinbuckland 17:25831977b98e 23 4};
justinbuckland 17:25831977b98e 24
justinbuckland 17:25831977b98e 25 unsigned long drive_board_uid[UID_TABLE_LENGTH][3] =
justinbuckland 17:25831977b98e 26 {{0x005B0060, 0x32375101, 0x32363531},
justinbuckland 31:d459d6c38e78 27 {0x00530028, 0x32375116, 0x30333732}, // updated board 2 UID
paullj 21:4833e7fbcec7 28 {0x00520060, 0x32375101, 0x32363531},
paullj 21:4833e7fbcec7 29 {0x00570060, 0x32375101, 0x32363531}};
justinbuckland 17:25831977b98e 30
justinbuckland 19:ab2d7aa17a20 31 float drive_board_cal[UID_TABLE_LENGTH][2][2] =
paullj 29:06235c37746a 32 {{{0.0908347476278717, 10.1921343711427}, {0.0497613470164513, 10.2109327517567}},
paullj 29:06235c37746a 33 {{0.0596907336847412, 10.1550084867437}, {0.0320376283698263, 10.2580153464834}},
paullj 29:06235c37746a 34 {{0.0119648730956925, 10.4065902688349}, {0.0256785142683800, 10.2921134395920}},
paullj 29:06235c37746a 35 {{0.0482969653247984, 10.0688110602909}, {0.0882102280729402, 10.1322703041679}}};
justinbuckland 17:25831977b98e 36
justinbuckland 16:2c563709cf09 37 MODSERIAL pc(PA_9, PA_10, BUFFER_SIZE); //mcu TX, RX, BUFFER_SIZE byte TX and RX buffers
justinbuckland 16:2c563709cf09 38 ADS8568_ADC adc(PB_15, PB_14, PB_13, PB_12, PC_15, PC_0, PC_1, PC_2, PC_3);
justinbuckland 16:2c563709cf09 39 I2C i2c(PB_7, PB_8); //SDA, SCL
sophiemeredith 11:8e6c8e654004 40 Timer timer;
justinbuckland 16:2c563709cf09 41 DigitalIn adc_busy(PA_8); //Busy interrupt sig#
sophiemeredith 11:8e6c8e654004 42
justinbuckland 16:2c563709cf09 43 //Heater Control
justinbuckland 25:f507cfd50fcc 44 DigitalOut drive_1(PC_9);
justinbuckland 25:f507cfd50fcc 45 DigitalOut drive_2(PC_8);
justinbuckland 25:f507cfd50fcc 46 DigitalOut guard_1(PC_7);
justinbuckland 25:f507cfd50fcc 47 DigitalOut guard_2(PC_6);
AlexStokoe 0:362148ad8f6f 48
justinbuckland 16:2c563709cf09 49 //Indicator LEDs
justinbuckland 16:2c563709cf09 50 DigitalOut hb_led(PC_13); //Green
justinbuckland 16:2c563709cf09 51 DigitalOut led_0(PC_4); //Red
justinbuckland 16:2c563709cf09 52 DigitalOut led_1(PC_5); //Green
justinbuckland 16:2c563709cf09 53
justinbuckland 25:f507cfd50fcc 54 //External LED
justinbuckland 25:f507cfd50fcc 55 DigitalOut led_ext(PB_4);
justinbuckland 25:f507cfd50fcc 56
justinbuckland 16:2c563709cf09 57 //User buttons
justinbuckland 16:2c563709cf09 58 DigitalIn user_0(PB_0);
justinbuckland 16:2c563709cf09 59 DigitalIn user_1(PB_1);
justinbuckland 16:2c563709cf09 60
justinbuckland 16:2c563709cf09 61 BusOut converts(PC_0, PC_1, PC_2, PC_3);
AlexStokoe 0:362148ad8f6f 62
AlexStokoe 0:362148ad8f6f 63 int main() {
sophiemeredith 11:8e6c8e654004 64 int eTime;
justinbuckland 16:2c563709cf09 65 int v[2], curr[2];
justinbuckland 17:25831977b98e 66 double r_adc[2], r_ohm[2];
justinbuckland 16:2c563709cf09 67
justinbuckland 16:2c563709cf09 68 int i_port[2] = {0,2};
justinbuckland 16:2c563709cf09 69 int v_port[2] = {1,3};
justinbuckland 2:23f848b21b09 70
justinbuckland 16:2c563709cf09 71 pc.baud(115200);
justinbuckland 16:2c563709cf09 72 adc.init();
AlexStokoe 0:362148ad8f6f 73
justinbuckland 25:f507cfd50fcc 74
justinbuckland 16:2c563709cf09 75 // Initialsation - all heaters off
justinbuckland 25:f507cfd50fcc 76 drive_1 = 0;
justinbuckland 25:f507cfd50fcc 77 drive_2 = 0;
justinbuckland 25:f507cfd50fcc 78 guard_1 = 0;
justinbuckland 25:f507cfd50fcc 79 guard_2 = 0;
justinbuckland 26:323238949f9d 80
justinbuckland 26:323238949f9d 81 // External LED off
justinbuckland 26:323238949f9d 82 led_ext = 0;
justinbuckland 16:2c563709cf09 83
justinbuckland 17:25831977b98e 84 pc.printf("\r\nUnique ID: %08X %08X %08X \r\n", uid[0], uid[1], uid[2]);
paullj 21:4833e7fbcec7 85 int i_board = -1;
justinbuckland 17:25831977b98e 86 for (int i = 0; i < UID_TABLE_LENGTH; i++)
justinbuckland 17:25831977b98e 87 {
justinbuckland 17:25831977b98e 88 if (uid[0]==drive_board_uid[i][0] && uid[1]==drive_board_uid[i][1] && uid[2]==drive_board_uid[i][2])
justinbuckland 17:25831977b98e 89 {
justinbuckland 19:ab2d7aa17a20 90 i_board = i;
justinbuckland 17:25831977b98e 91 i = UID_TABLE_LENGTH;
justinbuckland 17:25831977b98e 92 }
justinbuckland 17:25831977b98e 93 }
justinbuckland 17:25831977b98e 94
justinbuckland 30:d2b897a07f51 95 if (i_board != -1) pc.printf("Drive board: Board %d ADC measurement: Sync to heater pulse, 50us delay\n",drive_board_serial_number[i_board]);
justinbuckland 17:25831977b98e 96 else pc.printf("Drive board UID match not found\n");
justinbuckland 17:25831977b98e 97
justinbuckland 26:323238949f9d 98 pc.printf("iStep, eTime, I1, V1, R1_adc, R1_ohm, I2, V2, R2_adc, R2_ohm\n");
AlexStokoe 0:362148ad8f6f 99
justinbuckland 16:2c563709cf09 100 wait_ms(START_DELAY);
justinbuckland 16:2c563709cf09 101 timer.start();
AlexStokoe 0:362148ad8f6f 102
sophiemeredith 12:3f1df385d781 103 for (int iStep=0; iStep<N_STEPS; iStep++) {
justinbuckland 16:2c563709cf09 104
justinbuckland 16:2c563709cf09 105 eTime = timer.read_ms();
justinbuckland 16:2c563709cf09 106
justinbuckland 16:2c563709cf09 107 for (int iHeater=0; iHeater <2; iHeater++) {
justinbuckland 27:505c1565c076 108
justinbuckland 28:63280fb5b938 109 // turn on heater
justinbuckland 28:63280fb5b938 110 if (iHeater==0) {
justinbuckland 28:63280fb5b938 111 drive_1 = 1;
justinbuckland 28:63280fb5b938 112 led_0 = 1;
justinbuckland 28:63280fb5b938 113 led_1 = 0;
justinbuckland 28:63280fb5b938 114 }
justinbuckland 28:63280fb5b938 115 else {
justinbuckland 28:63280fb5b938 116 drive_2 = 1;
justinbuckland 28:63280fb5b938 117 led_0 = 0;
justinbuckland 28:63280fb5b938 118 led_1 = 1;
justinbuckland 28:63280fb5b938 119 }
justinbuckland 27:505c1565c076 120
justinbuckland 28:63280fb5b938 121 wait_us(MEAS_DELAY);
justinbuckland 28:63280fb5b938 122
justinbuckland 28:63280fb5b938 123 //Start ADC conversion
justinbuckland 28:63280fb5b938 124 adc.start_conversion(15);
justinbuckland 28:63280fb5b938 125
justinbuckland 28:63280fb5b938 126 //Wait until ADC is free
justinbuckland 28:63280fb5b938 127 while(adc_busy == 1) {
justinbuckland 28:63280fb5b938 128 wait_us(1);
justinbuckland 28:63280fb5b938 129 }
justinbuckland 27:505c1565c076 130
justinbuckland 28:63280fb5b938 131 //Turn off heater
justinbuckland 28:63280fb5b938 132 if (iHeater==0)
justinbuckland 28:63280fb5b938 133 drive_1 = 0;
justinbuckland 28:63280fb5b938 134 else
justinbuckland 28:63280fb5b938 135 drive_2 = 0;
justinbuckland 16:2c563709cf09 136
justinbuckland 28:63280fb5b938 137 //Get ADC values
justinbuckland 28:63280fb5b938 138 adc.read_channels();
justinbuckland 28:63280fb5b938 139 curr[iHeater] = adc.read_channel_result(i_port[iHeater]);
justinbuckland 28:63280fb5b938 140 v[iHeater] = adc.read_channel_result(v_port[iHeater]);
justinbuckland 27:505c1565c076 141
justinbuckland 26:323238949f9d 142 wait_us(MEAS_DELAY);
sophiemeredith 14:d764e256ac6d 143
justinbuckland 25:f507cfd50fcc 144 //Calculate resistance
justinbuckland 17:25831977b98e 145 r_adc[iHeater] = (float)v[iHeater]/(float)curr[iHeater];
paullj 21:4833e7fbcec7 146 if (i_board != -1)
justinbuckland 19:ab2d7aa17a20 147 r_ohm[iHeater] = drive_board_cal[i_board][iHeater][0] + r_adc[iHeater]*drive_board_cal[i_board][iHeater][1];
justinbuckland 17:25831977b98e 148 else
justinbuckland 17:25831977b98e 149 r_ohm[iHeater] = 0.0;
justinbuckland 17:25831977b98e 150
justinbuckland 26:323238949f9d 151 //Wait before driving other heater
justinbuckland 24:899071abfc14 152 wait_ms(LOG_INTERVAL/2);
justinbuckland 24:899071abfc14 153
justinbuckland 16:2c563709cf09 154 }
justinbuckland 26:323238949f9d 155 pc.printf("%5d, %10d, %10d, %10d, %10.6f, %10.6f, %10d, %10d, %10.6f, %10.6f\n", iStep, eTime, curr[0], v[0], r_adc[0], r_ohm[0], curr[1], v[1], r_adc[1], r_ohm[1]);
justinbuckland 16:2c563709cf09 156 }
justinbuckland 24:899071abfc14 157
justinbuckland 25:f507cfd50fcc 158 // turn everything off
justinbuckland 25:f507cfd50fcc 159 drive_1 = 0;
justinbuckland 25:f507cfd50fcc 160 drive_2 = 0;
justinbuckland 25:f507cfd50fcc 161 led_0 = 0;
justinbuckland 25:f507cfd50fcc 162 led_1 = 0;
justinbuckland 25:f507cfd50fcc 163
justinbuckland 5:67e4ee9a00dc 164 }