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@17:25831977b98e, 2019-09-19 (annotated)

Committer:
justinbuckland
Date:
Thu Sep 19 16:15:06 2019 +0000
Revision:
17:25831977b98e
Parent:
16:2c563709cf09
Child:
19:ab2d7aa17a20
Child:
20:c061539b31c7
Added board UID and ADC->Resistance calibration constants

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 16:2c563709cf09 3 #include "FastPWM.h"
justinbuckland 16:2c563709cf09 4 #include "MODSERIAL.h"
AlexStokoe 0:362148ad8f6f 5
justinbuckland 16:2c563709cf09 6 #define MEAS_DELAY 60 // measurement delay after turning on FET (us)
justinbuckland 17:25831977b98e 7 #define LOG_INTERVAL 1000 // log file interval (ms)
justinbuckland 16:2c563709cf09 8 #define START_DELAY 1000 // pause for startup (ms)
justinbuckland 17:25831977b98e 9 #define N_STEPS 20
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 17:25831977b98e 27 {0x00000000, 0x00000000, 0x00000000},
justinbuckland 17:25831977b98e 28 {0x00000000, 0x00000000, 0x00000000},
justinbuckland 17:25831977b98e 29 {0x00000000, 0x00000000, 0x00000000}};
justinbuckland 17:25831977b98e 30
justinbuckland 17:25831977b98e 31 float drive_board_cal[UID_TABLE_LENGTH][2] =
justinbuckland 17:25831977b98e 32 {{0.0, 1.0},
justinbuckland 17:25831977b98e 33 {0.0, 1.0},
justinbuckland 17:25831977b98e 34 {0.0, 1.0},
justinbuckland 17:25831977b98e 35 {0.0, 1.0}};
justinbuckland 17:25831977b98e 36
justinbuckland 17:25831977b98e 37
justinbuckland 16:2c563709cf09 38 MODSERIAL pc(PA_9, PA_10, BUFFER_SIZE); //mcu TX, RX, BUFFER_SIZE byte TX and RX buffers
justinbuckland 16:2c563709cf09 39 ADS8568_ADC adc(PB_15, PB_14, PB_13, PB_12, PC_15, PC_0, PC_1, PC_2, PC_3);
justinbuckland 16:2c563709cf09 40 I2C i2c(PB_7, PB_8); //SDA, SCL
sophiemeredith 11:8e6c8e654004 41 Timer timer;
justinbuckland 16:2c563709cf09 42 DigitalIn adc_busy(PA_8); //Busy interrupt sig#
sophiemeredith 11:8e6c8e654004 43
justinbuckland 16:2c563709cf09 44 //Heater Control
justinbuckland 16:2c563709cf09 45 FastPWM drive_1(PC_9);
justinbuckland 16:2c563709cf09 46 FastPWM drive_2(PC_8);
justinbuckland 16:2c563709cf09 47 FastPWM guard_1(PC_7);
justinbuckland 16:2c563709cf09 48 FastPWM guard_2(PC_6);
AlexStokoe 0:362148ad8f6f 49
justinbuckland 16:2c563709cf09 50 //Indicator LEDs
justinbuckland 16:2c563709cf09 51 DigitalOut hb_led(PC_13); //Green
justinbuckland 16:2c563709cf09 52 DigitalOut led_0(PC_4); //Red
justinbuckland 16:2c563709cf09 53 DigitalOut led_1(PC_5); //Green
justinbuckland 16:2c563709cf09 54
justinbuckland 16:2c563709cf09 55 //User buttons
justinbuckland 16:2c563709cf09 56 DigitalIn user_0(PB_0);
justinbuckland 16:2c563709cf09 57 DigitalIn user_1(PB_1);
justinbuckland 16:2c563709cf09 58
justinbuckland 16:2c563709cf09 59 BusOut converts(PC_0, PC_1, PC_2, PC_3);
AlexStokoe 0:362148ad8f6f 60
AlexStokoe 0:362148ad8f6f 61 int main() {
sophiemeredith 11:8e6c8e654004 62 int eTime;
justinbuckland 16:2c563709cf09 63 int v[2], curr[2];
justinbuckland 17:25831977b98e 64 double r_adc[2], r_ohm[2];
justinbuckland 16:2c563709cf09 65
justinbuckland 16:2c563709cf09 66 int i_port[2] = {0,2};
justinbuckland 16:2c563709cf09 67 int v_port[2] = {1,3};
justinbuckland 2:23f848b21b09 68
justinbuckland 16:2c563709cf09 69 pc.baud(115200);
justinbuckland 16:2c563709cf09 70 adc.init();
AlexStokoe 0:362148ad8f6f 71
justinbuckland 16:2c563709cf09 72 // Initialsation - all heaters off
justinbuckland 16:2c563709cf09 73 drive_1.prescaler(1);
justinbuckland 16:2c563709cf09 74 drive_1.period_ticks(1000);
justinbuckland 16:2c563709cf09 75 drive_1.pulsewidth_ticks(0);
justinbuckland 16:2c563709cf09 76
justinbuckland 16:2c563709cf09 77 guard_1.prescaler(1);
justinbuckland 16:2c563709cf09 78 guard_1.period_ticks(1000);
justinbuckland 16:2c563709cf09 79 guard_1.pulsewidth_ticks(0);
justinbuckland 16:2c563709cf09 80
justinbuckland 16:2c563709cf09 81 drive_2.prescaler(1);
justinbuckland 16:2c563709cf09 82 drive_2.period_ticks(1000);
justinbuckland 16:2c563709cf09 83 drive_2.pulsewidth_ticks(0);
justinbuckland 16:2c563709cf09 84
justinbuckland 16:2c563709cf09 85 guard_2.prescaler(1);
justinbuckland 16:2c563709cf09 86 guard_2.period_ticks(1000);
justinbuckland 16:2c563709cf09 87 guard_2.pulsewidth_ticks(0);
justinbuckland 16:2c563709cf09 88
justinbuckland 17:25831977b98e 89 pc.printf("\r\nUnique ID: %08X %08X %08X \r\n", uid[0], uid[1], uid[2]);
justinbuckland 17:25831977b98e 90 int i_board = 0;
justinbuckland 17:25831977b98e 91 for (int i = 0; i < UID_TABLE_LENGTH; i++)
justinbuckland 17:25831977b98e 92 {
justinbuckland 17:25831977b98e 93 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 94 {
justinbuckland 17:25831977b98e 95 i_board = drive_board_serial_number[i];
justinbuckland 17:25831977b98e 96 i = UID_TABLE_LENGTH;
justinbuckland 17:25831977b98e 97 }
justinbuckland 17:25831977b98e 98 }
justinbuckland 17:25831977b98e 99
justinbuckland 17:25831977b98e 100 if (i_board > 0) pc.printf("Drive board: BRD%d\n",i_board);
justinbuckland 17:25831977b98e 101 else pc.printf("Drive board UID match not found\n");
justinbuckland 17:25831977b98e 102
justinbuckland 17:25831977b98e 103 pc.printf("iStep, eTime, I1, V1, R1_adc, R1_ohm, I2, V2, R2_adc, R2_ohm\n");
AlexStokoe 0:362148ad8f6f 104
justinbuckland 16:2c563709cf09 105 wait_ms(START_DELAY);
justinbuckland 16:2c563709cf09 106 timer.start();
AlexStokoe 0:362148ad8f6f 107
sophiemeredith 12:3f1df385d781 108 for (int iStep=0; iStep<N_STEPS; iStep++) {
justinbuckland 16:2c563709cf09 109
justinbuckland 16:2c563709cf09 110 eTime = timer.read_ms();
justinbuckland 16:2c563709cf09 111 pc.printf("%5d, %10d,", iStep, eTime);
justinbuckland 16:2c563709cf09 112
justinbuckland 16:2c563709cf09 113 for (int iHeater=0; iHeater <2; iHeater++) {
justinbuckland 16:2c563709cf09 114 // measure heater
justinbuckland 16:2c563709cf09 115 if (iHeater==0)
justinbuckland 16:2c563709cf09 116 drive_1.pulsewidth_ticks(1000);
justinbuckland 16:2c563709cf09 117 else
justinbuckland 16:2c563709cf09 118 drive_2.pulsewidth_ticks(1000);
justinbuckland 16:2c563709cf09 119 wait_us(MEAS_DELAY);
justinbuckland 4:694f0e328a52 120
justinbuckland 16:2c563709cf09 121 //Start ADC conversion
justinbuckland 16:2c563709cf09 122 adc.start_conversion(15);
justinbuckland 16:2c563709cf09 123
justinbuckland 16:2c563709cf09 124 //Wait until ADC is free
justinbuckland 16:2c563709cf09 125 while(adc_busy == 1) {
justinbuckland 16:2c563709cf09 126 wait_us(1);
justinbuckland 16:2c563709cf09 127 }
justinbuckland 16:2c563709cf09 128
justinbuckland 16:2c563709cf09 129 //Turn off heater
justinbuckland 16:2c563709cf09 130 if (iHeater==0)
justinbuckland 16:2c563709cf09 131 drive_1.pulsewidth_ticks(0);
justinbuckland 16:2c563709cf09 132 else
justinbuckland 16:2c563709cf09 133 drive_2.pulsewidth_ticks(0);
justinbuckland 16:2c563709cf09 134 wait_us(MEAS_DELAY);
sophiemeredith 14:d764e256ac6d 135
justinbuckland 16:2c563709cf09 136 //Get ADC values
justinbuckland 16:2c563709cf09 137 adc.read_channels();
justinbuckland 16:2c563709cf09 138 curr[iHeater] = adc.read_channel_result(i_port[iHeater]);
justinbuckland 16:2c563709cf09 139 v[iHeater] = adc.read_channel_result(v_port[iHeater]);
justinbuckland 17:25831977b98e 140 r_adc[iHeater] = (float)v[iHeater]/(float)curr[iHeater];
justinbuckland 17:25831977b98e 141 if (i_board > 0)
justinbuckland 17:25831977b98e 142 r_ohm[iHeater] = drive_board_cal[i_board][0] + r_adc[iHeater]*drive_board_cal[i_board][1];
justinbuckland 17:25831977b98e 143 else
justinbuckland 17:25831977b98e 144 r_ohm[iHeater] = 0.0;
justinbuckland 17:25831977b98e 145
justinbuckland 16:2c563709cf09 146
justinbuckland 16:2c563709cf09 147 //Write output for iHeater
justinbuckland 17:25831977b98e 148 pc.printf("%10d, %10d, %10.6f, %10.6f", curr[iHeater], v[iHeater], r_adc[iHeater], r_ohm[iHeater]);
justinbuckland 16:2c563709cf09 149 }
justinbuckland 16:2c563709cf09 150 pc.printf("\n");
justinbuckland 9:3c5a43ce68bb 151 wait_ms(LOG_INTERVAL);
justinbuckland 16:2c563709cf09 152 }
justinbuckland 5:67e4ee9a00dc 153 }