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@16:2c563709cf09, 2019-09-13 (annotated)

Committer:
justinbuckland
Date:
Fri Sep 13 10:29:44 2019 +0000
Revision:
16:2c563709cf09
Parent:
15:a08527d78ffa
Child:
17:25831977b98e
Initial version, logs I, V, R every 5s with non-simultaneous drive of both heaters

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 16:2c563709cf09 7 #define LOG_INTERVAL 5000 // log file interval (ms)
justinbuckland 16:2c563709cf09 8 #define START_DELAY 1000 // pause for startup (ms)
justinbuckland 16:2c563709cf09 9 #define N_STEPS 1000
justinbuckland 16:2c563709cf09 10 #define BUFFER_SIZE 4096
AlexStokoe 0:362148ad8f6f 11
justinbuckland 16:2c563709cf09 12 MODSERIAL pc(PA_9, PA_10, BUFFER_SIZE); //mcu TX, RX, BUFFER_SIZE byte TX and RX buffers
justinbuckland 16:2c563709cf09 13 ADS8568_ADC adc(PB_15, PB_14, PB_13, PB_12, PC_15, PC_0, PC_1, PC_2, PC_3);
justinbuckland 16:2c563709cf09 14 I2C i2c(PB_7, PB_8); //SDA, SCL
sophiemeredith 11:8e6c8e654004 15 Timer timer;
justinbuckland 16:2c563709cf09 16 DigitalIn adc_busy(PA_8); //Busy interrupt sig#
sophiemeredith 11:8e6c8e654004 17
justinbuckland 16:2c563709cf09 18 //Heater Control
justinbuckland 16:2c563709cf09 19 FastPWM drive_1(PC_9);
justinbuckland 16:2c563709cf09 20 FastPWM drive_2(PC_8);
justinbuckland 16:2c563709cf09 21 FastPWM guard_1(PC_7);
justinbuckland 16:2c563709cf09 22 FastPWM guard_2(PC_6);
AlexStokoe 0:362148ad8f6f 23
justinbuckland 16:2c563709cf09 24 //Indicator LEDs
justinbuckland 16:2c563709cf09 25 DigitalOut hb_led(PC_13); //Green
justinbuckland 16:2c563709cf09 26 DigitalOut led_0(PC_4); //Red
justinbuckland 16:2c563709cf09 27 DigitalOut led_1(PC_5); //Green
justinbuckland 16:2c563709cf09 28
justinbuckland 16:2c563709cf09 29 //User buttons
justinbuckland 16:2c563709cf09 30 DigitalIn user_0(PB_0);
justinbuckland 16:2c563709cf09 31 DigitalIn user_1(PB_1);
justinbuckland 16:2c563709cf09 32
justinbuckland 16:2c563709cf09 33 BusOut converts(PC_0, PC_1, PC_2, PC_3);
AlexStokoe 0:362148ad8f6f 34
AlexStokoe 0:362148ad8f6f 35 int main() {
sophiemeredith 11:8e6c8e654004 36 int eTime;
justinbuckland 16:2c563709cf09 37 int v[2], curr[2];
justinbuckland 16:2c563709cf09 38 double r[2];
justinbuckland 16:2c563709cf09 39
justinbuckland 16:2c563709cf09 40 int i_port[2] = {0,2};
justinbuckland 16:2c563709cf09 41 int v_port[2] = {1,3};
justinbuckland 2:23f848b21b09 42
justinbuckland 16:2c563709cf09 43 pc.baud(115200);
justinbuckland 16:2c563709cf09 44 adc.init();
AlexStokoe 0:362148ad8f6f 45
justinbuckland 16:2c563709cf09 46 // Initialsation - all heaters off
justinbuckland 16:2c563709cf09 47 drive_1.prescaler(1);
justinbuckland 16:2c563709cf09 48 drive_1.period_ticks(1000);
justinbuckland 16:2c563709cf09 49 drive_1.pulsewidth_ticks(0);
justinbuckland 16:2c563709cf09 50
justinbuckland 16:2c563709cf09 51 guard_1.prescaler(1);
justinbuckland 16:2c563709cf09 52 guard_1.period_ticks(1000);
justinbuckland 16:2c563709cf09 53 guard_1.pulsewidth_ticks(0);
justinbuckland 16:2c563709cf09 54
justinbuckland 16:2c563709cf09 55 drive_2.prescaler(1);
justinbuckland 16:2c563709cf09 56 drive_2.period_ticks(1000);
justinbuckland 16:2c563709cf09 57 drive_2.pulsewidth_ticks(0);
justinbuckland 16:2c563709cf09 58
justinbuckland 16:2c563709cf09 59 guard_2.prescaler(1);
justinbuckland 16:2c563709cf09 60 guard_2.period_ticks(1000);
justinbuckland 16:2c563709cf09 61 guard_2.pulsewidth_ticks(0);
justinbuckland 16:2c563709cf09 62
justinbuckland 16:2c563709cf09 63 pc.printf("iStep, eTime, I1, V1, R1, I2, V2, R2\n");
AlexStokoe 0:362148ad8f6f 64
justinbuckland 16:2c563709cf09 65 wait_ms(START_DELAY);
justinbuckland 16:2c563709cf09 66 timer.start();
AlexStokoe 0:362148ad8f6f 67
sophiemeredith 12:3f1df385d781 68 for (int iStep=0; iStep<N_STEPS; iStep++) {
justinbuckland 16:2c563709cf09 69
justinbuckland 16:2c563709cf09 70 eTime = timer.read_ms();
justinbuckland 16:2c563709cf09 71 pc.printf("%5d, %10d,", iStep, eTime);
justinbuckland 16:2c563709cf09 72
justinbuckland 16:2c563709cf09 73 for (int iHeater=0; iHeater <2; iHeater++) {
justinbuckland 16:2c563709cf09 74 // measure heater
justinbuckland 16:2c563709cf09 75 if (iHeater==0)
justinbuckland 16:2c563709cf09 76 drive_1.pulsewidth_ticks(1000);
justinbuckland 16:2c563709cf09 77 else
justinbuckland 16:2c563709cf09 78 drive_2.pulsewidth_ticks(1000);
justinbuckland 16:2c563709cf09 79 wait_us(MEAS_DELAY);
justinbuckland 4:694f0e328a52 80
justinbuckland 16:2c563709cf09 81 //Start ADC conversion
justinbuckland 16:2c563709cf09 82 adc.start_conversion(15);
justinbuckland 16:2c563709cf09 83
justinbuckland 16:2c563709cf09 84 //Wait until ADC is free
justinbuckland 16:2c563709cf09 85 while(adc_busy == 1) {
justinbuckland 16:2c563709cf09 86 wait_us(1);
justinbuckland 16:2c563709cf09 87 }
justinbuckland 16:2c563709cf09 88
justinbuckland 16:2c563709cf09 89 //Turn off heater
justinbuckland 16:2c563709cf09 90 if (iHeater==0)
justinbuckland 16:2c563709cf09 91 drive_1.pulsewidth_ticks(0);
justinbuckland 16:2c563709cf09 92 else
justinbuckland 16:2c563709cf09 93 drive_2.pulsewidth_ticks(0);
justinbuckland 16:2c563709cf09 94 wait_us(MEAS_DELAY);
sophiemeredith 14:d764e256ac6d 95
justinbuckland 16:2c563709cf09 96 //Get ADC values
justinbuckland 16:2c563709cf09 97 adc.read_channels();
justinbuckland 16:2c563709cf09 98 curr[iHeater] = adc.read_channel_result(i_port[iHeater]);
justinbuckland 16:2c563709cf09 99 v[iHeater] = adc.read_channel_result(v_port[iHeater]);
justinbuckland 16:2c563709cf09 100 r[iHeater] = (float)v[iHeater]/(float)curr[iHeater];
justinbuckland 16:2c563709cf09 101
justinbuckland 16:2c563709cf09 102 //Write output for iHeater
justinbuckland 16:2c563709cf09 103 pc.printf("%10d, %10d, %10.6f", curr[iHeater], v[iHeater], r[iHeater]);
justinbuckland 16:2c563709cf09 104 }
justinbuckland 16:2c563709cf09 105 pc.printf("\n");
justinbuckland 9:3c5a43ce68bb 106 wait_ms(LOG_INTERVAL);
justinbuckland 16:2c563709cf09 107 }
justinbuckland 5:67e4ee9a00dc 108 }