Justin Buckland / Mbed 2 deprecated MEMSPCR_Control_Program_AD_Logging_PWM

ADC logging for temperature calibration

Dependencies:   mbed MODSERIAL FastPWM ADS8568_ADC

main.cpp@28:13f78b4a23c3, 2019-11-11 (annotated)

Committer:
justinbuckland
Date:
Mon Nov 11 08:30:40 2019 +0000
Revision:
28:13f78b4a23c3
Parent:
27:5dcd526d7598 
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 16:2c563709cf09 3 #include "FastPWM.h"
justinbuckland 16:2c563709cf09 4 #include "MODSERIAL.h"
AlexStokoe 0:362148ad8f6f 5
justinbuckland 28:13f78b4a23c3 6 #define MEAS_DELAY 60 // measurement delay after turning on FET (us)
justinbuckland 28:13f78b4a23c3 7 #define LOG_INTERVAL 1000 // log file interval (ms)
justinbuckland 28:13f78b4a23c3 8 #define START_DELAY 1000 // pause for startup (ms)
justinbuckland 28:13f78b4a23c3 9 #define N_STEPS 100
justinbuckland 28:13f78b4a23c3 10 #define BUFFER_SIZE 4096
justinbuckland 28:13f78b4a23c3 11 #define PWM_PERIOD_TICKS 1000
AlexStokoe 0:362148ad8f6f 12
justinbuckland 17:25831977b98e 13 //UID lookup address and pointer
justinbuckland 17:25831977b98e 14 #define UID_ADDR 0x1FFF7A10
justinbuckland 17:25831977b98e 15 unsigned long *uid = (unsigned long *) UID_ADDR;
justinbuckland 17:25831977b98e 16
justinbuckland 17:25831977b98e 17 //UID and drive board calibration table
justinbuckland 17:25831977b98e 18 #define UID_TABLE_LENGTH 4
justinbuckland 17:25831977b98e 19
justinbuckland 17:25831977b98e 20 int drive_board_serial_number[UID_TABLE_LENGTH] =
justinbuckland 17:25831977b98e 21 {1,
justinbuckland 17:25831977b98e 22 2,
justinbuckland 17:25831977b98e 23 3,
justinbuckland 17:25831977b98e 24 4};
justinbuckland 17:25831977b98e 25
justinbuckland 17:25831977b98e 26 unsigned long drive_board_uid[UID_TABLE_LENGTH][3] =
justinbuckland 17:25831977b98e 27 {{0x005B0060, 0x32375101, 0x32363531},
justinbuckland 28:13f78b4a23c3 28 {0x00530028, 0x32375116, 0x30333732}, // updated board 2 UID was {0x0051003D, 0x32375114, 0x30333732},
paullj 21:4833e7fbcec7 29 {0x00520060, 0x32375101, 0x32363531},
paullj 21:4833e7fbcec7 30 {0x00570060, 0x32375101, 0x32363531}};
justinbuckland 17:25831977b98e 31
justinbuckland 19:ab2d7aa17a20 32 float drive_board_cal[UID_TABLE_LENGTH][2][2] =
paullj 25:bd29d673e5d3 33 {{{0.0908347476278717, 10.1921343711427}, {0.0497613470164513, 10.2109327517567}},
paullj 25:bd29d673e5d3 34 {{0.0596907336847412, 10.1550084867437}, {0.0320376283698263, 10.2580153464834}},
paullj 25:bd29d673e5d3 35 {{0.0119648730956925, 10.4065902688349}, {0.0256785142683800, 10.2921134395920}},
paullj 25:bd29d673e5d3 36 {{0.0482969653247984, 10.0688110602909}, {0.0882102280729402, 10.1322703041679}}};
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 28:13f78b4a23c3 74 drive_1.period_ticks(PWM_PERIOD_TICKS);
justinbuckland 16:2c563709cf09 75 drive_1.pulsewidth_ticks(0);
justinbuckland 16:2c563709cf09 76
justinbuckland 16:2c563709cf09 77 guard_1.prescaler(1);
justinbuckland 28:13f78b4a23c3 78 guard_1.period_ticks(PWM_PERIOD_TICKS);
justinbuckland 16:2c563709cf09 79 guard_1.pulsewidth_ticks(0);
justinbuckland 16:2c563709cf09 80
justinbuckland 16:2c563709cf09 81 drive_2.prescaler(1);
justinbuckland 28:13f78b4a23c3 82 drive_2.period_ticks(PWM_PERIOD_TICKS);
justinbuckland 16:2c563709cf09 83 drive_2.pulsewidth_ticks(0);
justinbuckland 16:2c563709cf09 84
justinbuckland 16:2c563709cf09 85 guard_2.prescaler(1);
justinbuckland 28:13f78b4a23c3 86 guard_2.period_ticks(PWM_PERIOD_TICKS);
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]);
paullj 21:4833e7fbcec7 90 int i_board = -1;
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 19:ab2d7aa17a20 95 i_board = i;
justinbuckland 17:25831977b98e 96 i = UID_TABLE_LENGTH;
justinbuckland 17:25831977b98e 97 }
justinbuckland 17:25831977b98e 98 }
justinbuckland 17:25831977b98e 99
justinbuckland 26:dd4f3ef421d1 100 if (i_board != -1) pc.printf("Drive board: Board %d ADC measurement: PWM heater pulse, 60us delay\n",drive_board_serial_number[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
justinbuckland 27:5dcd526d7598 108 // indicate start
justinbuckland 27:5dcd526d7598 109 led_0 = 0;
justinbuckland 27:5dcd526d7598 110 led_1 = 1;
justinbuckland 27:5dcd526d7598 111
sophiemeredith 12:3f1df385d781 112 for (int iStep=0; iStep<N_STEPS; iStep++) {
justinbuckland 16:2c563709cf09 113
justinbuckland 16:2c563709cf09 114 eTime = timer.read_ms();
paullj 25:bd29d673e5d3 115
justinbuckland 16:2c563709cf09 116 for (int iHeater=0; iHeater <2; iHeater++) {
justinbuckland 16:2c563709cf09 117 // measure heater
justinbuckland 27:5dcd526d7598 118 if (iHeater==0)
justinbuckland 28:13f78b4a23c3 119 drive_1.pulsewidth_ticks(PWM_PERIOD_TICKS);
justinbuckland 16:2c563709cf09 120 else
justinbuckland 28:13f78b4a23c3 121 drive_2.pulsewidth_ticks(PWM_PERIOD_TICKS);
justinbuckland 16:2c563709cf09 122 wait_us(MEAS_DELAY);
justinbuckland 4:694f0e328a52 123
justinbuckland 16:2c563709cf09 124 //Start ADC conversion
justinbuckland 16:2c563709cf09 125 adc.start_conversion(15);
justinbuckland 16:2c563709cf09 126
justinbuckland 16:2c563709cf09 127 //Wait until ADC is free
justinbuckland 16:2c563709cf09 128 while(adc_busy == 1) {
justinbuckland 16:2c563709cf09 129 wait_us(1);
justinbuckland 16:2c563709cf09 130 }
justinbuckland 16:2c563709cf09 131
justinbuckland 16:2c563709cf09 132 //Turn off heater
justinbuckland 16:2c563709cf09 133 if (iHeater==0)
justinbuckland 16:2c563709cf09 134 drive_1.pulsewidth_ticks(0);
justinbuckland 16:2c563709cf09 135 else
justinbuckland 16:2c563709cf09 136 drive_2.pulsewidth_ticks(0);
justinbuckland 27:5dcd526d7598 137
justinbuckland 16:2c563709cf09 138 wait_us(MEAS_DELAY);
sophiemeredith 14:d764e256ac6d 139
justinbuckland 16:2c563709cf09 140 //Get ADC values
justinbuckland 16:2c563709cf09 141 adc.read_channels();
justinbuckland 16:2c563709cf09 142 curr[iHeater] = adc.read_channel_result(i_port[iHeater]);
justinbuckland 16:2c563709cf09 143 v[iHeater] = adc.read_channel_result(v_port[iHeater]);
justinbuckland 17:25831977b98e 144 r_adc[iHeater] = (float)v[iHeater]/(float)curr[iHeater];
paullj 21:4833e7fbcec7 145 if (i_board != -1)
justinbuckland 19:ab2d7aa17a20 146 r_ohm[iHeater] = drive_board_cal[i_board][iHeater][0] + r_adc[iHeater]*drive_board_cal[i_board][iHeater][1];
justinbuckland 17:25831977b98e 147 else
justinbuckland 17:25831977b98e 148 r_ohm[iHeater] = 0.0;
justinbuckland 17:25831977b98e 149
justinbuckland 24:899071abfc14 150 //Wait before drivinng other heater
justinbuckland 24:899071abfc14 151 wait_ms(LOG_INTERVAL/2);
justinbuckland 24:899071abfc14 152
justinbuckland 16:2c563709cf09 153 }
paullj 25:bd29d673e5d3 154 //Write output for iHeater
paullj 25:bd29d673e5d3 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 24:899071abfc14 156
justinbuckland 16:2c563709cf09 157 }
justinbuckland 27:5dcd526d7598 158
justinbuckland 27:5dcd526d7598 159 // indicate stop
justinbuckland 27:5dcd526d7598 160 led_0 = 1;
justinbuckland 27:5dcd526d7598 161 led_1 = 0;
justinbuckland 24:899071abfc14 162
justinbuckland 5:67e4ee9a00dc 163 }