ADC logging with demo drive board for calibration ADC read synchronised with heater on time
Dependencies: mbed MODSERIAL FastPWM ADS8568_ADC
main.cpp@27:505c1565c076, 2019-10-10 (annotated)
- Committer:
- justinbuckland
- Date:
- Thu Oct 10 13:59:45 2019 +0000
- Revision:
- 27:505c1565c076
- Parent:
- 26:323238949f9d
- Child:
- 28:63280fb5b938
turn off heater between ADC reads
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 | 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 | 27:505c1565c076 | 10 | #define N_READ 1 |
justinbuckland | 16:2c563709cf09 | 11 | #define BUFFER_SIZE 4096 |
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}, |
paullj | 21:4833e7fbcec7 | 28 | {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 | 21:4833e7fbcec7 | 33 | {{{0.096724353, 10.1817431}, {0.056098807, 10.19962849}}, |
justinbuckland | 23:1d3a1d61c2b3 | 34 | {{0.0596907336847412, 10.1550084867437}, {0.0320376283698263, 10.2580153464834}}, |
justinbuckland | 25:f507cfd50fcc | 35 | {{0.01887149, 10.39360225}, {0.03115874, 10.28199855}}, |
justinbuckland | 25:f507cfd50fcc | 36 | {{0.052545339, 10.06008621}, {0.094239471, 10.11983777}}}; |
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 | 25:f507cfd50fcc | 45 | DigitalOut drive_1(PC_9); |
justinbuckland | 25:f507cfd50fcc | 46 | DigitalOut drive_2(PC_8); |
justinbuckland | 25:f507cfd50fcc | 47 | DigitalOut guard_1(PC_7); |
justinbuckland | 25:f507cfd50fcc | 48 | DigitalOut 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 | 25:f507cfd50fcc | 55 | //External LED |
justinbuckland | 25:f507cfd50fcc | 56 | DigitalOut led_ext(PB_4); |
justinbuckland | 25:f507cfd50fcc | 57 | |
justinbuckland | 16:2c563709cf09 | 58 | //User buttons |
justinbuckland | 16:2c563709cf09 | 59 | DigitalIn user_0(PB_0); |
justinbuckland | 16:2c563709cf09 | 60 | DigitalIn user_1(PB_1); |
justinbuckland | 16:2c563709cf09 | 61 | |
justinbuckland | 16:2c563709cf09 | 62 | BusOut converts(PC_0, PC_1, PC_2, PC_3); |
AlexStokoe | 0:362148ad8f6f | 63 | |
AlexStokoe | 0:362148ad8f6f | 64 | int main() { |
sophiemeredith | 11:8e6c8e654004 | 65 | int eTime; |
justinbuckland | 16:2c563709cf09 | 66 | int v[2], curr[2]; |
justinbuckland | 17:25831977b98e | 67 | double r_adc[2], r_ohm[2]; |
justinbuckland | 16:2c563709cf09 | 68 | |
justinbuckland | 16:2c563709cf09 | 69 | int i_port[2] = {0,2}; |
justinbuckland | 16:2c563709cf09 | 70 | int v_port[2] = {1,3}; |
justinbuckland | 2:23f848b21b09 | 71 | |
justinbuckland | 16:2c563709cf09 | 72 | pc.baud(115200); |
justinbuckland | 16:2c563709cf09 | 73 | adc.init(); |
AlexStokoe | 0:362148ad8f6f | 74 | |
justinbuckland | 25:f507cfd50fcc | 75 | |
justinbuckland | 16:2c563709cf09 | 76 | // Initialsation - all heaters off |
justinbuckland | 25:f507cfd50fcc | 77 | drive_1 = 0; |
justinbuckland | 25:f507cfd50fcc | 78 | drive_2 = 0; |
justinbuckland | 25:f507cfd50fcc | 79 | guard_1 = 0; |
justinbuckland | 25:f507cfd50fcc | 80 | guard_2 = 0; |
justinbuckland | 26:323238949f9d | 81 | |
justinbuckland | 26:323238949f9d | 82 | // External LED off |
justinbuckland | 26:323238949f9d | 83 | led_ext = 0; |
justinbuckland | 16:2c563709cf09 | 84 | |
justinbuckland | 17:25831977b98e | 85 | pc.printf("\r\nUnique ID: %08X %08X %08X \r\n", uid[0], uid[1], uid[2]); |
paullj | 21:4833e7fbcec7 | 86 | int i_board = -1; |
justinbuckland | 17:25831977b98e | 87 | for (int i = 0; i < UID_TABLE_LENGTH; i++) |
justinbuckland | 17:25831977b98e | 88 | { |
justinbuckland | 17:25831977b98e | 89 | 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 | 90 | { |
justinbuckland | 19:ab2d7aa17a20 | 91 | i_board = i; |
justinbuckland | 17:25831977b98e | 92 | i = UID_TABLE_LENGTH; |
justinbuckland | 17:25831977b98e | 93 | } |
justinbuckland | 17:25831977b98e | 94 | } |
justinbuckland | 17:25831977b98e | 95 | |
paullj | 21:4833e7fbcec7 | 96 | if (i_board != -1) pc.printf("Drive board: Board %d\n",drive_board_serial_number[i_board]); |
justinbuckland | 17:25831977b98e | 97 | else pc.printf("Drive board UID match not found\n"); |
justinbuckland | 17:25831977b98e | 98 | |
justinbuckland | 26:323238949f9d | 99 | pc.printf("MEAS_DELAY: %d\n",MEAS_DELAY); |
justinbuckland | 26:323238949f9d | 100 | pc.printf("N_READ: %d\n",N_READ); |
justinbuckland | 26:323238949f9d | 101 | |
justinbuckland | 26:323238949f9d | 102 | pc.printf("iStep, 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 | |
sophiemeredith | 12:3f1df385d781 | 107 | for (int iStep=0; iStep<N_STEPS; iStep++) { |
justinbuckland | 16:2c563709cf09 | 108 | |
justinbuckland | 16:2c563709cf09 | 109 | eTime = timer.read_ms(); |
justinbuckland | 16:2c563709cf09 | 110 | |
justinbuckland | 16:2c563709cf09 | 111 | for (int iHeater=0; iHeater <2; iHeater++) { |
justinbuckland | 25:f507cfd50fcc | 112 | //Average N_READ ADC cycles |
justinbuckland | 25:f507cfd50fcc | 113 | curr[iHeater] = 0; |
justinbuckland | 25:f507cfd50fcc | 114 | v[iHeater] = 0; |
justinbuckland | 25:f507cfd50fcc | 115 | for (int iRead = 0; iRead<N_READ; iRead++) { |
justinbuckland | 27:505c1565c076 | 116 | |
justinbuckland | 27:505c1565c076 | 117 | // turn on heater |
justinbuckland | 27:505c1565c076 | 118 | if (iHeater==0) { |
justinbuckland | 27:505c1565c076 | 119 | drive_1 = 1; |
justinbuckland | 27:505c1565c076 | 120 | led_0 = 1; |
justinbuckland | 27:505c1565c076 | 121 | led_1 = 0; |
justinbuckland | 27:505c1565c076 | 122 | } |
justinbuckland | 27:505c1565c076 | 123 | else { |
justinbuckland | 27:505c1565c076 | 124 | drive_2 = 1; |
justinbuckland | 27:505c1565c076 | 125 | led_0 = 0; |
justinbuckland | 27:505c1565c076 | 126 | led_1 = 1; |
justinbuckland | 27:505c1565c076 | 127 | } |
justinbuckland | 27:505c1565c076 | 128 | |
justinbuckland | 27:505c1565c076 | 129 | wait_us(MEAS_DELAY); |
justinbuckland | 27:505c1565c076 | 130 | |
justinbuckland | 25:f507cfd50fcc | 131 | //Start ADC conversion |
justinbuckland | 25:f507cfd50fcc | 132 | adc.start_conversion(15); |
justinbuckland | 16:2c563709cf09 | 133 | |
justinbuckland | 27:505c1565c076 | 134 | //Turn off heater |
justinbuckland | 27:505c1565c076 | 135 | if (iHeater==0) |
justinbuckland | 27:505c1565c076 | 136 | drive_1 = 0; |
justinbuckland | 27:505c1565c076 | 137 | else |
justinbuckland | 27:505c1565c076 | 138 | drive_2 = 0; |
justinbuckland | 27:505c1565c076 | 139 | |
justinbuckland | 25:f507cfd50fcc | 140 | //Wait until ADC is free |
justinbuckland | 25:f507cfd50fcc | 141 | while(adc_busy == 1) { |
justinbuckland | 25:f507cfd50fcc | 142 | wait_us(1); |
justinbuckland | 25:f507cfd50fcc | 143 | } |
justinbuckland | 16:2c563709cf09 | 144 | |
justinbuckland | 27:505c1565c076 | 145 | //Get ADC values |
justinbuckland | 25:f507cfd50fcc | 146 | adc.read_channels(); |
justinbuckland | 25:f507cfd50fcc | 147 | curr[iHeater] += adc.read_channel_result(i_port[iHeater]); |
justinbuckland | 25:f507cfd50fcc | 148 | v[iHeater] += adc.read_channel_result(v_port[iHeater]); |
justinbuckland | 25:f507cfd50fcc | 149 | } |
justinbuckland | 27:505c1565c076 | 150 | |
justinbuckland | 26:323238949f9d | 151 | wait_us(MEAS_DELAY); |
sophiemeredith | 14:d764e256ac6d | 152 | |
justinbuckland | 25:f507cfd50fcc | 153 | //Calculate resistance |
justinbuckland | 17:25831977b98e | 154 | r_adc[iHeater] = (float)v[iHeater]/(float)curr[iHeater]; |
paullj | 21:4833e7fbcec7 | 155 | if (i_board != -1) |
justinbuckland | 19:ab2d7aa17a20 | 156 | r_ohm[iHeater] = drive_board_cal[i_board][iHeater][0] + r_adc[iHeater]*drive_board_cal[i_board][iHeater][1]; |
justinbuckland | 17:25831977b98e | 157 | else |
justinbuckland | 17:25831977b98e | 158 | r_ohm[iHeater] = 0.0; |
justinbuckland | 17:25831977b98e | 159 | |
justinbuckland | 26:323238949f9d | 160 | //Wait before driving other heater |
justinbuckland | 24:899071abfc14 | 161 | wait_ms(LOG_INTERVAL/2); |
justinbuckland | 24:899071abfc14 | 162 | |
justinbuckland | 16:2c563709cf09 | 163 | } |
justinbuckland | 26:323238949f9d | 164 | 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 | 165 | } |
justinbuckland | 24:899071abfc14 | 166 | |
justinbuckland | 25:f507cfd50fcc | 167 | // turn everything off |
justinbuckland | 25:f507cfd50fcc | 168 | drive_1 = 0; |
justinbuckland | 25:f507cfd50fcc | 169 | drive_2 = 0; |
justinbuckland | 25:f507cfd50fcc | 170 | led_0 = 0; |
justinbuckland | 25:f507cfd50fcc | 171 | led_1 = 0; |
justinbuckland | 25:f507cfd50fcc | 172 | |
justinbuckland | 5:67e4ee9a00dc | 173 | } |