![](/media/cache/group/default_image.jpg.50x50_q85.jpg)
ADC logging with demo drive board for calibration
Dependencies: mbed MODSERIAL FastPWM ADS8568_ADC
main.cpp@30:ab214b681d9b, 2020-03-17 (annotated)
- Committer:
- paullj
- Date:
- Tue Mar 17 15:02:33 2020 +0000
- Revision:
- 30:ab214b681d9b
- Parent:
- 29:ef9e567bed5b
- Parent:
- 28:f2585571ce25
- Child:
- 31:0888ce8aa0e1
Merge changes
Who changed what in which revision?
User | Revision | Line number | New 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 | |
paullj | 25:bd29d673e5d3 | 6 | #define MEAS_DELAY 60 // measurement delay after turning on FET (us) |
paullj | 29:ef9e567bed5b | 7 | #define LOG_INTERVAL 200 // log file interval (ms) |
paullj | 29:ef9e567bed5b | 8 | #define START_DELAY 100 // 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}, |
paullj | 28:f2585571ce25 | 27 | {0x00530028, 0x32375116, 0x30333732}, |
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 | 28:f2585571ce25 | 32 | {{{0.098846, 10.190057}, {0.060713, 10.208784}}, |
paullj | 28:f2585571ce25 | 33 | {{0.060987, 10.154840}, {0.033058, 10.239591}}, |
paullj | 28:f2585571ce25 | 34 | {{0.014312, 10.405662}, {0.000000, 1.0000000}}, |
paullj | 28:f2585571ce25 | 35 | {{0.055152, 10.062970}, {0.114355, 10.123188}}}; |
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 | 16:2c563709cf09 | 44 | FastPWM drive_1(PC_9); |
justinbuckland | 16:2c563709cf09 | 45 | FastPWM drive_2(PC_8); |
justinbuckland | 16:2c563709cf09 | 46 | FastPWM guard_1(PC_7); |
justinbuckland | 16:2c563709cf09 | 47 | FastPWM 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 | 16:2c563709cf09 | 54 | //User buttons |
justinbuckland | 16:2c563709cf09 | 55 | DigitalIn user_0(PB_0); |
justinbuckland | 16:2c563709cf09 | 56 | DigitalIn user_1(PB_1); |
justinbuckland | 16:2c563709cf09 | 57 | |
justinbuckland | 16:2c563709cf09 | 58 | BusOut converts(PC_0, PC_1, PC_2, PC_3); |
AlexStokoe | 0:362148ad8f6f | 59 | |
AlexStokoe | 0:362148ad8f6f | 60 | int main() { |
sophiemeredith | 11:8e6c8e654004 | 61 | int eTime; |
justinbuckland | 16:2c563709cf09 | 62 | int v[2], curr[2]; |
justinbuckland | 17:25831977b98e | 63 | double r_adc[2], r_ohm[2]; |
justinbuckland | 16:2c563709cf09 | 64 | |
justinbuckland | 16:2c563709cf09 | 65 | int i_port[2] = {0,2}; |
justinbuckland | 16:2c563709cf09 | 66 | int v_port[2] = {1,3}; |
justinbuckland | 2:23f848b21b09 | 67 | |
justinbuckland | 16:2c563709cf09 | 68 | pc.baud(115200); |
justinbuckland | 16:2c563709cf09 | 69 | adc.init(); |
AlexStokoe | 0:362148ad8f6f | 70 | |
justinbuckland | 16:2c563709cf09 | 71 | // Initialsation - all heaters off |
justinbuckland | 16:2c563709cf09 | 72 | drive_1.prescaler(1); |
justinbuckland | 16:2c563709cf09 | 73 | drive_1.period_ticks(1000); |
justinbuckland | 16:2c563709cf09 | 74 | drive_1.pulsewidth_ticks(0); |
justinbuckland | 16:2c563709cf09 | 75 | |
justinbuckland | 16:2c563709cf09 | 76 | guard_1.prescaler(1); |
justinbuckland | 16:2c563709cf09 | 77 | guard_1.period_ticks(1000); |
justinbuckland | 16:2c563709cf09 | 78 | guard_1.pulsewidth_ticks(0); |
justinbuckland | 16:2c563709cf09 | 79 | |
justinbuckland | 16:2c563709cf09 | 80 | drive_2.prescaler(1); |
justinbuckland | 16:2c563709cf09 | 81 | drive_2.period_ticks(1000); |
justinbuckland | 16:2c563709cf09 | 82 | drive_2.pulsewidth_ticks(0); |
justinbuckland | 16:2c563709cf09 | 83 | |
justinbuckland | 16:2c563709cf09 | 84 | guard_2.prescaler(1); |
justinbuckland | 16:2c563709cf09 | 85 | guard_2.period_ticks(1000); |
justinbuckland | 16:2c563709cf09 | 86 | guard_2.pulsewidth_ticks(0); |
justinbuckland | 16:2c563709cf09 | 87 | |
justinbuckland | 17:25831977b98e | 88 | pc.printf("\r\nUnique ID: %08X %08X %08X \r\n", uid[0], uid[1], uid[2]); |
paullj | 21:4833e7fbcec7 | 89 | int i_board = -1; |
justinbuckland | 17:25831977b98e | 90 | for (int i = 0; i < UID_TABLE_LENGTH; i++) |
justinbuckland | 17:25831977b98e | 91 | { |
justinbuckland | 17:25831977b98e | 92 | 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 | 93 | { |
justinbuckland | 19:ab2d7aa17a20 | 94 | i_board = i; |
justinbuckland | 17:25831977b98e | 95 | i = UID_TABLE_LENGTH; |
justinbuckland | 17:25831977b98e | 96 | } |
justinbuckland | 17:25831977b98e | 97 | } |
justinbuckland | 17:25831977b98e | 98 | |
paullj | 29:ef9e567bed5b | 99 | if (i_board != -1) pc.printf("Drive board: %d ADC measurement: PWM heater pulse. 60us delay\n",drive_board_serial_number[i_board]); |
justinbuckland | 17:25831977b98e | 100 | else pc.printf("Drive board UID match not found\n"); |
justinbuckland | 17:25831977b98e | 101 | |
paullj | 29:ef9e567bed5b | 102 | pc.printf("eTime, I1, V1, R1_adc, R1_ohm, I2, V2, R2_adc, R2_ohm\n"); |
AlexStokoe | 0:362148ad8f6f | 103 | |
justinbuckland | 16:2c563709cf09 | 104 | wait_ms(START_DELAY); |
justinbuckland | 16:2c563709cf09 | 105 | timer.start(); |
AlexStokoe | 0:362148ad8f6f | 106 | |
justinbuckland | 27:5dcd526d7598 | 107 | // indicate start |
justinbuckland | 27:5dcd526d7598 | 108 | led_0 = 0; |
justinbuckland | 27:5dcd526d7598 | 109 | led_1 = 1; |
justinbuckland | 27:5dcd526d7598 | 110 | |
paullj | 29:ef9e567bed5b | 111 | while(!user_1) { |
paullj | 29:ef9e567bed5b | 112 | while (pc.getcNb()!='p' && !user_0); |
justinbuckland | 16:2c563709cf09 | 113 | eTime = timer.read_ms(); |
paullj | 25:bd29d673e5d3 | 114 | |
justinbuckland | 16:2c563709cf09 | 115 | for (int iHeater=0; iHeater <2; iHeater++) { |
justinbuckland | 16:2c563709cf09 | 116 | // measure heater |
justinbuckland | 27:5dcd526d7598 | 117 | if (iHeater==0) |
justinbuckland | 16:2c563709cf09 | 118 | drive_1.pulsewidth_ticks(1000); |
justinbuckland | 16:2c563709cf09 | 119 | else |
justinbuckland | 16:2c563709cf09 | 120 | drive_2.pulsewidth_ticks(1000); |
justinbuckland | 16:2c563709cf09 | 121 | wait_us(MEAS_DELAY); |
justinbuckland | 4:694f0e328a52 | 122 | |
justinbuckland | 16:2c563709cf09 | 123 | //Start ADC conversion |
justinbuckland | 16:2c563709cf09 | 124 | adc.start_conversion(15); |
justinbuckland | 16:2c563709cf09 | 125 | |
justinbuckland | 16:2c563709cf09 | 126 | //Wait until ADC is free |
justinbuckland | 16:2c563709cf09 | 127 | while(adc_busy == 1) { |
justinbuckland | 16:2c563709cf09 | 128 | wait_us(1); |
justinbuckland | 16:2c563709cf09 | 129 | } |
justinbuckland | 16:2c563709cf09 | 130 | |
justinbuckland | 16:2c563709cf09 | 131 | //Turn off heater |
justinbuckland | 16:2c563709cf09 | 132 | if (iHeater==0) |
justinbuckland | 16:2c563709cf09 | 133 | drive_1.pulsewidth_ticks(0); |
justinbuckland | 16:2c563709cf09 | 134 | else |
justinbuckland | 16:2c563709cf09 | 135 | drive_2.pulsewidth_ticks(0); |
justinbuckland | 27:5dcd526d7598 | 136 | |
justinbuckland | 16:2c563709cf09 | 137 | wait_us(MEAS_DELAY); |
sophiemeredith | 14:d764e256ac6d | 138 | |
justinbuckland | 16:2c563709cf09 | 139 | //Get ADC values |
justinbuckland | 16:2c563709cf09 | 140 | adc.read_channels(); |
justinbuckland | 16:2c563709cf09 | 141 | curr[iHeater] = adc.read_channel_result(i_port[iHeater]); |
justinbuckland | 16:2c563709cf09 | 142 | v[iHeater] = adc.read_channel_result(v_port[iHeater]); |
justinbuckland | 17:25831977b98e | 143 | r_adc[iHeater] = (float)v[iHeater]/(float)curr[iHeater]; |
paullj | 21:4833e7fbcec7 | 144 | if (i_board != -1) |
justinbuckland | 19:ab2d7aa17a20 | 145 | r_ohm[iHeater] = drive_board_cal[i_board][iHeater][0] + r_adc[iHeater]*drive_board_cal[i_board][iHeater][1]; |
justinbuckland | 17:25831977b98e | 146 | else |
justinbuckland | 17:25831977b98e | 147 | r_ohm[iHeater] = 0.0; |
justinbuckland | 17:25831977b98e | 148 | |
justinbuckland | 24:899071abfc14 | 149 | //Wait before drivinng other heater |
justinbuckland | 24:899071abfc14 | 150 | wait_ms(LOG_INTERVAL/2); |
paullj | 29:ef9e567bed5b | 151 | wait_us(MEAS_DELAY); |
justinbuckland | 24:899071abfc14 | 152 | |
justinbuckland | 16:2c563709cf09 | 153 | } |
paullj | 25:bd29d673e5d3 | 154 | //Write output for iHeater |
paullj | 29:ef9e567bed5b | 155 | pc.printf("%10d, %10d, %10.6f, %10.6f, %10d, %10d, %10.6f, %10.6f \n", 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 | } |