SmartCharge / Mbed 2 deprecated 2017charger_16ampONLY

single current only

Dependencies:   Watchdog mbed

main.cpp@1:31e63b43238f, 2017-01-26 (annotated)

Committer:
magdamcn
Date:
Thu Jan 26 12:08:23 2017 +0000
Revision:
1:31e63b43238f
Parent:
0:0ba5f6ec8fa5
Child:
2:156af70e6f15
CONVEX 2017rev1; - watchdog; - 3 sec reset button; - 32/16 Amp Charging; - 9V & 6V timers not applied

Who changed what in which revision?

UserRevisionLine numberNew contents of line
magdamcn 1:31e63b43238f 1 //////////////////////////////////////////
magdamcn 1:31e63b43238f 2 // Copyright (c) 2017 Smartcharge Ltd //
magdamcn 1:31e63b43238f 3 //////////////////////////////////////////
magdamcn 1:31e63b43238f 4 // >>CONVEX 2017rev1 build<< //
magdamcn 1:31e63b43238f 5 // MAIN FEATURES: //
magdamcn 1:31e63b43238f 6 // - watchdog //
magdamcn 1:31e63b43238f 7 // - 3 sec reset button //
magdamcn 1:31e63b43238f 8 // - 32/16 Amp Charging //
magdamcn 1:31e63b43238f 9 // - 9V & 6V timers not applied //
magdamcn 1:31e63b43238f 10 // in this revision, line 315&325 //
magdamcn 1:31e63b43238f 11 //////////////////////////////////////////
magdamcn 0:0ba5f6ec8fa5 12
magdamcn 0:0ba5f6ec8fa5 13 #include "mbed.h"
magdamcn 0:0ba5f6ec8fa5 14 #include "Watchdog.h"
magdamcn 0:0ba5f6ec8fa5 15
magdamcn 0:0ba5f6ec8fa5 16 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 17 // * Variables for capturing analog cp and pp values *
magdamcn 0:0ba5f6ec8fa5 18 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 19 AnalogIn cp_value(A1); //A1 – cp analog read.
magdamcn 0:0ba5f6ec8fa5 20 AnalogIn pp_value(A2); //A2 - pp analog read.
magdamcn 0:0ba5f6ec8fa5 21
magdamcn 0:0ba5f6ec8fa5 22 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 23 // * Variables and constants for new cp acquisition routine *
magdamcn 0:0ba5f6ec8fa5 24 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 25 #define NUMBER_OF_SAMPLES 5000 // Size of ADC sample series for cp signal (default = 5000).
magdamcn 0:0ba5f6ec8fa5 26 #define VOLTAGE_RENORMALISATION 4.5 // Renormalisation constant to correct cp measured voltages (default = 4.5).
magdamcn 0:0ba5f6ec8fa5 27 #define VOLTAGE_THRESHOLD 4.0 // Threshold value for pwm edge detection (default = 4.0).
magdamcn 0:0ba5f6ec8fa5 28 float cp_voltage; // Global variable to store the measured voltage of the cp signal.
magdamcn 0:0ba5f6ec8fa5 29 float cp_duty_cycle; // Global variable to store the measured duty cycle of the cp signal.
magdamcn 0:0ba5f6ec8fa5 30 float cp_frequency; // Global variable to store the the measured frequency of the cp signal.
magdamcn 0:0ba5f6ec8fa5 31 Timer cp_timer; // Timer used to determine the frequency of the cp signal.
magdamcn 0:0ba5f6ec8fa5 32 uint16_t cp_array[NUMBER_OF_SAMPLES]; // Array to store ADC sample series for cp signal.
magdamcn 0:0ba5f6ec8fa5 33
magdamcn 0:0ba5f6ec8fa5 34 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 35 // * Constant for voltage checking routine *
magdamcn 0:0ba5f6ec8fa5 36 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 37 #define ACCEPTABLE_VOLTAGE_RANGE 0.5 // Sets the acceptable range of measured cp voltages (default 0.5, i.e. +/-0.5 V around value of 12, 9, 6V)
magdamcn 0:0ba5f6ec8fa5 38
magdamcn 0:0ba5f6ec8fa5 39 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 40 // * Timers and variables for reset button *
magdamcn 0:0ba5f6ec8fa5 41 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 42 InterruptIn button(D8); // Interupt for button on pin D8.
magdamcn 0:0ba5f6ec8fa5 43 Timer button_timer; // Timer used for reset button press.
magdamcn 0:0ba5f6ec8fa5 44 Timeout button_timeout; // Timeout case for reset button press.
magdamcn 0:0ba5f6ec8fa5 45 bool reset_down = false; // Flag used to determine whether reset button is held down.
magdamcn 0:0ba5f6ec8fa5 46 bool reset_charger = false; // Flag used to determine whether charger is to be reset.
magdamcn 0:0ba5f6ec8fa5 47 #define RESET_SECONDS 2 // Define length of time in seconds reset button needs to be held down before reset registered (default 3s).
magdamcn 0:0ba5f6ec8fa5 48
magdamcn 0:0ba5f6ec8fa5 49 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 50 // * Variables and constants to set the charging current *
magdamcn 0:0ba5f6ec8fa5 51 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 52 #define UPPER_CURRENT 32 // Sets the upper current value desired.
magdamcn 1:31e63b43238f 53 #define LOWER_CURRENT 16 // Sets the lower current value desired.
magdamcn 0:0ba5f6ec8fa5 54 float pwm_duty_high = 1.0-((UPPER_CURRENT / 30.0) * 0.5); // Calculates the pwm duty cycle for the desired upper current.
magdamcn 0:0ba5f6ec8fa5 55 float pwm_duty_low = 1.0-((LOWER_CURRENT / 30.0) * 0.5); // Calculates the pwm duty cycle for the desired lower current.
magdamcn 0:0ba5f6ec8fa5 56 bool use_upper_current = false;
magdamcn 0:0ba5f6ec8fa5 57
magdamcn 0:0ba5f6ec8fa5 58 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 59 // * Variables and constants to allow state changes *
magdamcn 0:0ba5f6ec8fa5 60 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 61 unsigned char control_pilot;
magdamcn 1:31e63b43238f 62 #define PILOT_NOK 0 // Error state.
magdamcn 1:31e63b43238f 63 #define PILOT_12V 1 // Standby state.
magdamcn 1:31e63b43238f 64 #define PILOT_9V 2 // Vehicle detection state.
magdamcn 1:31e63b43238f 65 #define PILOT_6V 3 // Charging state.
magdamcn 1:31e63b43238f 66 #define PILOT_DIODE 4 // Charging state with ventilation (not currently implemented).
magdamcn 1:31e63b43238f 67 #define PILOT_RESET 5 // Reset state.
magdamcn 1:31e63b43238f 68 #define PWM_CHANGE 6 // New state added to allow change in PWM duty cycle and charging current.
magdamcn 1:31e63b43238f 69 #define PILOT_START_AGAIN 7 // Restart charger if stuck in stateB - 9V for defined amount of time.
magdamcn 0:0ba5f6ec8fa5 70 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 71 // * Digital out definitions *
magdamcn 0:0ba5f6ec8fa5 72 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 73 PwmOut my_pwm(D5); // PWM out on pin D5.
magdamcn 0:0ba5f6ec8fa5 74 DigitalOut lock(D7); // Cable lock on pin D7.
magdamcn 0:0ba5f6ec8fa5 75 DigitalOut relay(D12); // Relay on pin D12.
magdamcn 0:0ba5f6ec8fa5 76 DigitalOut contactor(D13); // Contactor on pin D13.
magdamcn 0:0ba5f6ec8fa5 77 DigitalOut green(D9); // Green LED on pin D9.
magdamcn 0:0ba5f6ec8fa5 78 DigitalOut red(D10); // Red LED on pin D10.
magdamcn 0:0ba5f6ec8fa5 79 DigitalOut blue(D11); // Blue LED on pin D11.
magdamcn 0:0ba5f6ec8fa5 80
magdamcn 0:0ba5f6ec8fa5 81 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 82 // * Serial connections *
magdamcn 0:0ba5f6ec8fa5 83 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 84 Serial pc(USBTX, USBRX); // Serial output to PC.
magdamcn 0:0ba5f6ec8fa5 85 int TESTCOUNTER = 0; // Variable to count number of cycles of main loop. Used to determine when to switch the pwm in this test version.
magdamcn 0:0ba5f6ec8fa5 86
magdamcn 1:31e63b43238f 87 int stateB_COUNTER = 0; // Variable to count number of cycles of main loop. Used to reset charger from state B - 9V to state A and re-initiate charging.
magdamcn 0:0ba5f6ec8fa5 88 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 89 // * New Acquisition Routine for Capturing CP Signal Data *
magdamcn 0:0ba5f6ec8fa5 90 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 91 void cp_acquire()
magdamcn 0:0ba5f6ec8fa5 92 {
magdamcn 0:0ba5f6ec8fa5 93 int i; // Variable for loop counter.
magdamcn 0:0ba5f6ec8fa5 94 float sample_value_current = 0; // Stores the current cp value obtained by ADC (A1).
magdamcn 0:0ba5f6ec8fa5 95 float sample_value_previous = 0; // Stores the previous cp value obtained by ADC (A1).
magdamcn 0:0ba5f6ec8fa5 96 float peak_counter; // Used to store the number of samples representing a peak of the pwm square wave.
magdamcn 0:0ba5f6ec8fa5 97 float trough_counter; // Used to store the number of samples representing a trough of the pwm square wave.
magdamcn 0:0ba5f6ec8fa5 98 float voltage_average; // Used to calculate the average peak voltage value.
magdamcn 0:0ba5f6ec8fa5 99 float thres_cross_rise; // Used to store the number of times the pwm wave goes from low to high.
magdamcn 0:0ba5f6ec8fa5 100 float thres_cross_fall; // Used to store the number of times the pwm wave goes from high to low.
magdamcn 0:0ba5f6ec8fa5 101 float t; // Used to determine the time over which samples were acquired.
magdamcn 0:0ba5f6ec8fa5 102
magdamcn 0:0ba5f6ec8fa5 103 cp_timer.start(); // Starts a timer before we begin sampling the cp signal.
magdamcn 0:0ba5f6ec8fa5 104 for (i = 0; i < NUMBER_OF_SAMPLES; i++) // Starts a loop to take a certain number of samples as defined in NUMBER_OF_SAMPLES.
magdamcn 0:0ba5f6ec8fa5 105 {
magdamcn 0:0ba5f6ec8fa5 106 wait_us(30); // Waits 30 us. This sets the sample rate at approximately 33 KS/second.
magdamcn 0:0ba5f6ec8fa5 107 cp_array[i] = cp_value.read_u16(); // Reads the ADC (A1) and stores the measured cp voltage as a 16 bit integer in cp_array.
magdamcn 0:0ba5f6ec8fa5 108 }
magdamcn 0:0ba5f6ec8fa5 109 cp_timer.stop(); // Stop the timer once the acqusition has finished.
magdamcn 0:0ba5f6ec8fa5 110 t = cp_timer.read_us(); // Read the timer value in microseconds and store the result in t.
magdamcn 0:0ba5f6ec8fa5 111 t = t / 1000000.0; // Divide t by 1000000 to convert from microseconds to seconds.
magdamcn 0:0ba5f6ec8fa5 112 cp_timer.reset(); // Reset the timer.
magdamcn 0:0ba5f6ec8fa5 113
magdamcn 0:0ba5f6ec8fa5 114 peak_counter = 0; // Set peak_counter to zero.
magdamcn 0:0ba5f6ec8fa5 115 trough_counter = 0; // Set trough_counter to zero.
magdamcn 0:0ba5f6ec8fa5 116 voltage_average = 0; // Set voltage_average to zero.
magdamcn 0:0ba5f6ec8fa5 117 thres_cross_rise = 0; // Set thres_cross_rise to zero.
magdamcn 0:0ba5f6ec8fa5 118 thres_cross_fall = 0; // Set thres_cross_fall to zero.
magdamcn 0:0ba5f6ec8fa5 119
magdamcn 0:0ba5f6ec8fa5 120 // Having captured cp data, we now have to process each sample. This is done in a separate loop to maximize the ADC sampling rate.
magdamcn 0:0ba5f6ec8fa5 121 for (i = 0; i < NUMBER_OF_SAMPLES; i++)
magdamcn 0:0ba5f6ec8fa5 122 {
magdamcn 0:0ba5f6ec8fa5 123 // The cp data was stored in cp_array as a 16 bit integer. To convert this into a voltage we divide by 65535 (16 bits is 0 - 65535)
magdamcn 0:0ba5f6ec8fa5 124 // and multiply by 3.3 V. Because of the resistors and diode on the shield, we need to renormalise the values and scale them up
magdamcn 0:0ba5f6ec8fa5 125 // by a factor of 4.5 (VOLTAGE_RENORMALISATION).
magdamcn 0:0ba5f6ec8fa5 126 sample_value_current = (cp_array[i] * 3.3 * VOLTAGE_RENORMALISATION) / 65535.0;
magdamcn 0:0ba5f6ec8fa5 127
magdamcn 0:0ba5f6ec8fa5 128
magdamcn 0:0ba5f6ec8fa5 129 if (sample_value_current > VOLTAGE_THRESHOLD) // We examine the cp voltage. If it is above the threshold then we assume it is at the peak of the pwm square wave.
magdamcn 0:0ba5f6ec8fa5 130 {
magdamcn 0:0ba5f6ec8fa5 131 peak_counter+=1; // Add one to the peak_counter.
magdamcn 0:0ba5f6ec8fa5 132 voltage_average+=sample_value_current; // Add the cp_voltage to a running total (voltage_average) so we can work out the average voltage later.
magdamcn 0:0ba5f6ec8fa5 133 }
magdamcn 0:0ba5f6ec8fa5 134 else
magdamcn 0:0ba5f6ec8fa5 135 {
magdamcn 0:0ba5f6ec8fa5 136 trough_counter+=1; // If the cp voltage is less than the threshold then we assume it is at the trough of the pwm square wave and increment trough_counter.
magdamcn 0:0ba5f6ec8fa5 137 }
magdamcn 0:0ba5f6ec8fa5 138
magdamcn 0:0ba5f6ec8fa5 139
magdamcn 0:0ba5f6ec8fa5 140 if (i > 0) // If we've already processed the first sample then ...
magdamcn 0:0ba5f6ec8fa5 141 {
magdamcn 0:0ba5f6ec8fa5 142 if (sample_value_current > VOLTAGE_THRESHOLD && sample_value_previous < VOLTAGE_THRESHOLD) // ... we check if the cp voltage we're looking at is above the threshold and if the previous cp voltage
magdamcn 0:0ba5f6ec8fa5 143 // is below the threshold. If this is the case then we've detected the rising edge of the pwm square wave.
magdamcn 0:0ba5f6ec8fa5 144 {
magdamcn 0:0ba5f6ec8fa5 145 thres_cross_rise+=1; // We increment thres_cross_rise if this is the case.
magdamcn 0:0ba5f6ec8fa5 146 }
magdamcn 0:0ba5f6ec8fa5 147 if (sample_value_current < VOLTAGE_THRESHOLD && sample_value_previous > VOLTAGE_THRESHOLD) // Alternatively, if the cp voltage we're looking at is below the theshold and the previous cp voltage
magdamcn 0:0ba5f6ec8fa5 148 // is above the threshold then we've detected the falling edge of the pwm square wave.
magdamcn 0:0ba5f6ec8fa5 149 {
magdamcn 0:0ba5f6ec8fa5 150 thres_cross_fall+=1; // We increment thres_cross_fall is this is the case.
magdamcn 0:0ba5f6ec8fa5 151 }
magdamcn 0:0ba5f6ec8fa5 152 }
magdamcn 0:0ba5f6ec8fa5 153
magdamcn 0:0ba5f6ec8fa5 154 sample_value_previous = sample_value_current; // Before we proces the next sample, we copy the current value into the previous value.
magdamcn 0:0ba5f6ec8fa5 155 }
magdamcn 0:0ba5f6ec8fa5 156
magdamcn 0:0ba5f6ec8fa5 157
magdamcn 0:0ba5f6ec8fa5 158 if(peak_counter == 0) // If, having processed each sample, the peak_counter is still zero, then every cp voltage we acquired was less than the threshold ...
magdamcn 0:0ba5f6ec8fa5 159 {
magdamcn 0:0ba5f6ec8fa5 160 cp_voltage = -12.0; // ... which implies that the cp is not at 6, 9, or 12V. In the current implementation, that means the cp is actually at -12 V.
magdamcn 0:0ba5f6ec8fa5 161 }
magdamcn 0:0ba5f6ec8fa5 162 else // On the other hand, if the peak_counter is greater than 0, then some (pwm is on) or all (DC, pwm is off) of the values were greater than the threshold ...
magdamcn 0:0ba5f6ec8fa5 163 {
magdamcn 0:0ba5f6ec8fa5 164 cp_voltage = voltage_average / peak_counter; // ... so determine the cp voltage by taking the running total (voltage_average) and dividing it by peak_counter.
magdamcn 0:0ba5f6ec8fa5 165 }
magdamcn 0:0ba5f6ec8fa5 166
magdamcn 0:0ba5f6ec8fa5 167 cp_duty_cycle = peak_counter / NUMBER_OF_SAMPLES; // The duty cycle is the number of peak samples of the pwm square waves divided by the total number of samples ...
magdamcn 0:0ba5f6ec8fa5 168 cp_duty_cycle = cp_duty_cycle * 100.0; // ... but we need to convert it into a percentage.
magdamcn 0:0ba5f6ec8fa5 169 cp_frequency = ((thres_cross_rise + thres_cross_fall) / 2.0) / t; // The frequency of the cp signal is the total number of crossings divided by 2, divided by the time.
magdamcn 0:0ba5f6ec8fa5 170
magdamcn 0:0ba5f6ec8fa5 171 pc.printf("CP Measured Peak/DC Voltage (V): %f \r\n", cp_voltage);
magdamcn 0:0ba5f6ec8fa5 172 pc.printf("CP Measured Duty Cycle (%%): %f \r\n", cp_duty_cycle);
magdamcn 0:0ba5f6ec8fa5 173 pc.printf("CP Measured Frequency (Hz): %f \r\n", cp_frequency);
magdamcn 0:0ba5f6ec8fa5 174 }
magdamcn 0:0ba5f6ec8fa5 175
magdamcn 0:0ba5f6ec8fa5 176
magdamcn 0:0ba5f6ec8fa5 177
magdamcn 0:0ba5f6ec8fa5 178 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 179 // * Routines for handling reset button press *
magdamcn 0:0ba5f6ec8fa5 180 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 181 void button_timed_out()
magdamcn 0:0ba5f6ec8fa5 182 {
magdamcn 0:0ba5f6ec8fa5 183 reset_charger = true;
magdamcn 0:0ba5f6ec8fa5 184 pc.printf("Reset button pressed for more than 3 sec! Charger reset! \r\n");
magdamcn 0:0ba5f6ec8fa5 185 }
magdamcn 0:0ba5f6ec8fa5 186
magdamcn 0:0ba5f6ec8fa5 187 void reset_pressed()
magdamcn 0:0ba5f6ec8fa5 188 {
magdamcn 0:0ba5f6ec8fa5 189 pc.printf("Reset button pressed ... starting timer. \r\n");
magdamcn 0:0ba5f6ec8fa5 190 button_timer.stop();
magdamcn 0:0ba5f6ec8fa5 191 button_timer.reset();
magdamcn 0:0ba5f6ec8fa5 192 button_timer.start();
magdamcn 0:0ba5f6ec8fa5 193 reset_down = true;
magdamcn 0:0ba5f6ec8fa5 194 button_timeout.attach(&button_timed_out, RESET_SECONDS);
magdamcn 0:0ba5f6ec8fa5 195 }
magdamcn 0:0ba5f6ec8fa5 196
magdamcn 0:0ba5f6ec8fa5 197 void reset_released()
magdamcn 0:0ba5f6ec8fa5 198 {
magdamcn 0:0ba5f6ec8fa5 199 int elapsed_seconds;
magdamcn 0:0ba5f6ec8fa5 200 pc.printf("Reset button released. \r\n");
magdamcn 0:0ba5f6ec8fa5 201 elapsed_seconds = button_timer.read();
magdamcn 0:0ba5f6ec8fa5 202 button_timer.stop();
magdamcn 0:0ba5f6ec8fa5 203 button_timer.reset();
magdamcn 0:0ba5f6ec8fa5 204 if (elapsed_seconds > RESET_SECONDS)
magdamcn 0:0ba5f6ec8fa5 205 {
magdamcn 0:0ba5f6ec8fa5 206 reset_charger = true;
magdamcn 0:0ba5f6ec8fa5 207 pc.printf("Reset button was pressed for more than 3 sec! \r\n");
magdamcn 0:0ba5f6ec8fa5 208 }
magdamcn 0:0ba5f6ec8fa5 209 else
magdamcn 0:0ba5f6ec8fa5 210 {
magdamcn 0:0ba5f6ec8fa5 211 pc.printf("Reset button released before 3 seconds were up. \r\n");
magdamcn 0:0ba5f6ec8fa5 212 }
magdamcn 0:0ba5f6ec8fa5 213 pc.printf("Detach the timeout and setup for the next time.\r\n");
magdamcn 0:0ba5f6ec8fa5 214 pc.printf("%u \r\n", elapsed_seconds);
magdamcn 0:0ba5f6ec8fa5 215 button_timeout.detach();
magdamcn 0:0ba5f6ec8fa5 216 }
magdamcn 0:0ba5f6ec8fa5 217
magdamcn 0:0ba5f6ec8fa5 218
magdamcn 0:0ba5f6ec8fa5 219
magdamcn 0:0ba5f6ec8fa5 220 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 221 // * Routine for Checking CP Voltages *
magdamcn 0:0ba5f6ec8fa5 222 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 223 bool cp_check_voltage (float v) // Function accepts a voltage value (eg. 12V, 9V, 6V) ...
magdamcn 0:0ba5f6ec8fa5 224 {
magdamcn 0:0ba5f6ec8fa5 225 bool voltage_in_range = false; // ... and initially sets a flag to false.
magdamcn 0:0ba5f6ec8fa5 226
magdamcn 0:0ba5f6ec8fa5 227 // If the measured cp voltage is within a range of +/- ACCEPTABLE_VOLTAGE_RANGE around the
magdamcn 0:0ba5f6ec8fa5 228 // value (12V, 9V, 6V) then we change the flag state to true.
magdamcn 0:0ba5f6ec8fa5 229 if (cp_voltage < (v + ACCEPTABLE_VOLTAGE_RANGE) && cp_voltage > (v - ACCEPTABLE_VOLTAGE_RANGE)) voltage_in_range = true;
magdamcn 0:0ba5f6ec8fa5 230
magdamcn 0:0ba5f6ec8fa5 231 return voltage_in_range; // The function then returns the value of the flag state.
magdamcn 0:0ba5f6ec8fa5 232 }
magdamcn 0:0ba5f6ec8fa5 233
magdamcn 0:0ba5f6ec8fa5 234
magdamcn 0:0ba5f6ec8fa5 235
magdamcn 0:0ba5f6ec8fa5 236 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 237 // * Main *
magdamcn 0:0ba5f6ec8fa5 238 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 239 int main()
magdamcn 0:0ba5f6ec8fa5 240 {
magdamcn 0:0ba5f6ec8fa5 241 button.fall(&reset_pressed); // Attach interupt to button when pressed.
magdamcn 0:0ba5f6ec8fa5 242 button.rise(&reset_released); // Attach interupt to button when released.
magdamcn 0:0ba5f6ec8fa5 243
magdamcn 0:0ba5f6ec8fa5 244 float reading_pp; // Create variable to store pp reading.
magdamcn 0:0ba5f6ec8fa5 245 bool cable_32A = false; // Create boolean to flag whether a 32 or 16A cable is being used. Default is 16A cable (cable_32A = false).
magdamcn 0:0ba5f6ec8fa5 246 bool cable_connected = false; // Create boolean to flag whether a cable is attached.
magdamcn 0:0ba5f6ec8fa5 247 bool pwm_state = false; // Create boolean to flag current state of pwm (whether it is on or off).
magdamcn 0:0ba5f6ec8fa5 248 float pwm_duty_cycle; // Create float to store the current pwm duty cycle.
magdamcn 0:0ba5f6ec8fa5 249
magdamcn 0:0ba5f6ec8fa5 250 while(true) // Start of process loop.
magdamcn 0:0ba5f6ec8fa5 251 {
magdamcn 0:0ba5f6ec8fa5 252 // check the cable using pp value
magdamcn 0:0ba5f6ec8fa5 253 reading_pp = pp_value.read(); // Read pp value and ...
magdamcn 0:0ba5f6ec8fa5 254 reading_pp = reading_pp * 3300; // ... multiply it by 3300 to convert to mV.
magdamcn 0:0ba5f6ec8fa5 255
magdamcn 0:0ba5f6ec8fa5 256 if(reading_pp > 3200) // If the pp value is 3.3 V (greater than 3200 mV) then ...
magdamcn 0:0ba5f6ec8fa5 257 {
magdamcn 0:0ba5f6ec8fa5 258 cable_connected = false; // ... the cable *isn't* connected to charger ...
magdamcn 0:0ba5f6ec8fa5 259 pc.printf("Cable not connected. \r\n");
magdamcn 0:0ba5f6ec8fa5 260 }
magdamcn 0:0ba5f6ec8fa5 261 else
magdamcn 0:0ba5f6ec8fa5 262 {
magdamcn 0:0ba5f6ec8fa5 263 cable_connected = true; // ... otherwise the cable *is* connected to charger.
magdamcn 0:0ba5f6ec8fa5 264 pc.printf("Cable connected. \r\n");
magdamcn 0:0ba5f6ec8fa5 265 }
magdamcn 0:0ba5f6ec8fa5 266
magdamcn 0:0ba5f6ec8fa5 267 if(reading_pp > 200 && reading_pp < 300) // If the pp reading is between 200 and 300 mV then ...
magdamcn 0:0ba5f6ec8fa5 268 {
magdamcn 0:0ba5f6ec8fa5 269 cable_32A = false; // ... a 16A cable is being used.
magdamcn 0:0ba5f6ec8fa5 270 pc.printf("16A cable detected. \r\n");
magdamcn 0:0ba5f6ec8fa5 271 }
magdamcn 0:0ba5f6ec8fa5 272
magdamcn 0:0ba5f6ec8fa5 273 if(reading_pp > 0 && reading_pp <100) // If the pp reading if between 0 and 100 mV then ...
magdamcn 0:0ba5f6ec8fa5 274 {
magdamcn 0:0ba5f6ec8fa5 275 cable_32A = true; // ... a 32A cable is being used.
magdamcn 0:0ba5f6ec8fa5 276 pc.printf("32A cable detected. \r\n");
magdamcn 0:0ba5f6ec8fa5 277 }
magdamcn 0:0ba5f6ec8fa5 278
magdamcn 0:0ba5f6ec8fa5 279 cp_acquire(); // Call the new acquisition routine (replaces the moving average in previous versions).
magdamcn 0:0ba5f6ec8fa5 280
magdamcn 0:0ba5f6ec8fa5 281 if (cable_connected == false)
magdamcn 0:0ba5f6ec8fa5 282 {
magdamcn 0:0ba5f6ec8fa5 283 if (cp_check_voltage(12) == true) control_pilot = PILOT_12V;
magdamcn 0:0ba5f6ec8fa5 284
magdamcn 0:0ba5f6ec8fa5 285 if (cp_check_voltage(-12) == true)
magdamcn 0:0ba5f6ec8fa5 286 {
magdamcn 0:0ba5f6ec8fa5 287 control_pilot = PILOT_12V;
magdamcn 0:0ba5f6ec8fa5 288 reset_charger = false;
magdamcn 0:0ba5f6ec8fa5 289 }
magdamcn 1:31e63b43238f 290 if (cp_check_voltage(12) == false && cp_check_voltage(-12) == false)control_pilot = PILOT_NOK; // voltage not at 12 or -12, error accured
magdamcn 0:0ba5f6ec8fa5 291 }
magdamcn 0:0ba5f6ec8fa5 292
magdamcn 0:0ba5f6ec8fa5 293 if (cable_connected == true)
magdamcn 0:0ba5f6ec8fa5 294 {
magdamcn 1:31e63b43238f 295 if (cp_check_voltage(12) == true) control_pilot = PILOT_12V;
magdamcn 0:0ba5f6ec8fa5 296 if (cp_check_voltage(9) == true) control_pilot = PILOT_9V;
magdamcn 0:0ba5f6ec8fa5 297 if (cp_check_voltage(6) == true) control_pilot = PILOT_6V;
magdamcn 0:0ba5f6ec8fa5 298 if (reset_charger == true) control_pilot = PILOT_RESET;
magdamcn 1:31e63b43238f 299 //if (cp_check_voltage(9) == false && cp_check_voltage(6) == false && cp_check_voltage(12) == false && reset_charger == false )control_pilot = PILOT_NOK; // voltage not at expected values, error accured
magdamcn 0:0ba5f6ec8fa5 300 }
magdamcn 0:0ba5f6ec8fa5 301 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 302 // * Switching PWM Cycle & TEST Counter Timer *
magdamcn 0:0ba5f6ec8fa5 303 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 304 // if (use_upper_current == false) pwm_duty_cycle = pwm_duty_low;
magdamcn 0:0ba5f6ec8fa5 305 // if (use_upper_current == true) pwm_duty_cycle = pwm_duty_high;
magdamcn 0:0ba5f6ec8fa5 306 //
magdamcn 0:0ba5f6ec8fa5 307 // if (TESTCOUNTER > 1800) control_pilot = PWM_CHANGE; // Each cycle takes approximately 1 second, so 1800 seconds is a change of pwm every 30 mins or so.
magdamcn 0:0ba5f6ec8fa5 308 // * TESTERCOUNTER monitoring is switched of for the Smartcharge Home+ charger, PWN cycle based on a cable inserted
magdamcn 0:0ba5f6ec8fa5 309 //
magdamcn 0:0ba5f6ec8fa5 310 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 311
magdamcn 0:0ba5f6ec8fa5 312 // ************************************************************
magdamcn 1:31e63b43238f 313 // * PWM cycle based on cable instered *
magdamcn 0:0ba5f6ec8fa5 314 // ************************************************************
magdamcn 0:0ba5f6ec8fa5 315 if (cable_32A == false) pwm_duty_cycle = pwm_duty_low;
magdamcn 0:0ba5f6ec8fa5 316 if (cable_32A == true) pwm_duty_cycle = pwm_duty_high;
magdamcn 1:31e63b43238f 317
magdamcn 1:31e63b43238f 318 //if (stateB_COUNTER > 3600) control_pilot = PILOT_START_AGAIN; // Each cycle takes approximately 1 second, so 3600 seconds is a change of pwm every hour or so.
magdamcn 1:31e63b43238f 319 //9V monitorin & time reser disabled for this version
magdamcn 0:0ba5f6ec8fa5 320
magdamcn 0:0ba5f6ec8fa5 321 switch(control_pilot)
magdamcn 0:0ba5f6ec8fa5 322 {
magdamcn 0:0ba5f6ec8fa5 323 case PILOT_12V:
magdamcn 0:0ba5f6ec8fa5 324 contactor = 0;
magdamcn 0:0ba5f6ec8fa5 325 lock = 0;
magdamcn 0:0ba5f6ec8fa5 326 red = 0;
magdamcn 0:0ba5f6ec8fa5 327 green = 0;
magdamcn 0:0ba5f6ec8fa5 328 blue = 1;
magdamcn 0:0ba5f6ec8fa5 329 my_pwm = 0;
magdamcn 1:31e63b43238f 330 my_pwm.write(0);
magdamcn 0:0ba5f6ec8fa5 331 pwm_state = false;
magdamcn 1:31e63b43238f 332 pc.printf("Charger in STATE:------------------------------------------------ A. \r\n");
magdamcn 0:0ba5f6ec8fa5 333 pc.printf("PILOT_12V - Pilot at 12 V. \r\n");
magdamcn 1:31e63b43238f 334 TESTCOUNTER =0;
magdamcn 1:31e63b43238f 335 pc.printf("TESTCOUNTER timer:----------------------------------- %u seconds \r\n", TESTCOUNTER);
magdamcn 1:31e63b43238f 336 stateB_COUNTER =0;
magdamcn 1:31e63b43238f 337 pc.printf("stateB_COUNTER timer:-------------------------------- %u seconds \r\n", stateB_COUNTER);
magdamcn 0:0ba5f6ec8fa5 338 break;
magdamcn 0:0ba5f6ec8fa5 339
magdamcn 0:0ba5f6ec8fa5 340 case PILOT_9V:
magdamcn 0:0ba5f6ec8fa5 341 contactor = 0;
magdamcn 0:0ba5f6ec8fa5 342 //relay=0;
magdamcn 0:0ba5f6ec8fa5 343 lock = 1;
magdamcn 0:0ba5f6ec8fa5 344 red = 1;
magdamcn 0:0ba5f6ec8fa5 345 green = 1;
magdamcn 0:0ba5f6ec8fa5 346 blue = 0;
magdamcn 0:0ba5f6ec8fa5 347 if (pwm_state == false)
magdamcn 0:0ba5f6ec8fa5 348 {
magdamcn 0:0ba5f6ec8fa5 349 my_pwm.period_us(1000);
magdamcn 0:0ba5f6ec8fa5 350 my_pwm.pulsewidth_us(1000);
magdamcn 0:0ba5f6ec8fa5 351 my_pwm.write(pwm_duty_cycle);
magdamcn 1:31e63b43238f 352 pwm_state = true;
magdamcn 0:0ba5f6ec8fa5 353 }
magdamcn 1:31e63b43238f 354 pc.printf("PWM duty cycle is at: ------------------------------------------- %.1f %% \r\n",100-pwm_duty_cycle*100);
magdamcn 1:31e63b43238f 355 pc.printf("Charger in STATE:------------------------------------------------ B. \r\n");
magdamcn 0:0ba5f6ec8fa5 356 pc.printf("PILOT_9V - Pilot at 9 V. \r\n");
magdamcn 1:31e63b43238f 357 TESTCOUNTER =0;
magdamcn 1:31e63b43238f 358 pc.printf("TESTCOUNTER timer:----------------------------------- %u seconds \r\n", TESTCOUNTER);
magdamcn 1:31e63b43238f 359 //stateB_COUNTER+=1;
magdamcn 1:31e63b43238f 360 pc.printf("stateB_COUNTER timer: ------------------------------- %u seconds \r\n", stateB_COUNTER);
magdamcn 0:0ba5f6ec8fa5 361 break;
magdamcn 0:0ba5f6ec8fa5 362
magdamcn 0:0ba5f6ec8fa5 363 case PILOT_6V:
magdamcn 0:0ba5f6ec8fa5 364 contactor = 1;
magdamcn 0:0ba5f6ec8fa5 365 relay = 1;
magdamcn 0:0ba5f6ec8fa5 366 lock = 1;
magdamcn 0:0ba5f6ec8fa5 367 red = 0;
magdamcn 0:0ba5f6ec8fa5 368 green = 1;
magdamcn 0:0ba5f6ec8fa5 369 blue = 0;
magdamcn 0:0ba5f6ec8fa5 370 if (pwm_state == false)
magdamcn 0:0ba5f6ec8fa5 371 {
magdamcn 0:0ba5f6ec8fa5 372 my_pwm.period_us(1000);
magdamcn 0:0ba5f6ec8fa5 373 my_pwm.pulsewidth_us(1000);
magdamcn 0:0ba5f6ec8fa5 374 my_pwm.write(pwm_duty_cycle);
magdamcn 0:0ba5f6ec8fa5 375 pwm_state = true;
magdamcn 0:0ba5f6ec8fa5 376 }
magdamcn 0:0ba5f6ec8fa5 377 pc.printf("PWM duty cycle is at: %.1f %% \r\n", 100-pwm_duty_cycle*100);
magdamcn 1:31e63b43238f 378 pc.printf("Charger in STATE:------------------------------------------------ C. \r\n");
magdamcn 0:0ba5f6ec8fa5 379 pc.printf("PILOT_6V - Pilot at 6 V. \r\n");
magdamcn 0:0ba5f6ec8fa5 380 // TESTCOUNTER+=1;
magdamcn 0:0ba5f6ec8fa5 381 // * TESTCOUNTER switched of
magdamcn 1:31e63b43238f 382 pc.printf("TESTCOUNTER timer:----------------------------------- %u seconds \r\n", TESTCOUNTER);
magdamcn 1:31e63b43238f 383 stateB_COUNTER = 0;
magdamcn 1:31e63b43238f 384 pc.printf("stateB_COUNTER timer:-------------------------------- %u seconds \r\n", stateB_COUNTER);
magdamcn 0:0ba5f6ec8fa5 385 break;
magdamcn 0:0ba5f6ec8fa5 386
magdamcn 0:0ba5f6ec8fa5 387 case PILOT_NOK:
magdamcn 1:31e63b43238f 388 contactor = 0;
magdamcn 1:31e63b43238f 389 relay = 0;
magdamcn 0:0ba5f6ec8fa5 390 lock = 0;
magdamcn 1:31e63b43238f 391 my_pwm.period_ms(1);
magdamcn 1:31e63b43238f 392 my_pwm.pulsewidth_ms(1);
magdamcn 1:31e63b43238f 393 my_pwm.write(1);
magdamcn 1:31e63b43238f 394 pwm_state = false;
magdamcn 0:0ba5f6ec8fa5 395 red = 1;
magdamcn 0:0ba5f6ec8fa5 396 green = 0;
magdamcn 0:0ba5f6ec8fa5 397 blue = 0;
magdamcn 1:31e63b43238f 398 wait(0.5); // 500 ms
magdamcn 1:31e63b43238f 399 red = 0; // LED is OFF
magdamcn 1:31e63b43238f 400 wait(0.2); // 200 ms
magdamcn 0:0ba5f6ec8fa5 401 pc.printf("Error. \r\n");
magdamcn 1:31e63b43238f 402 pc.printf("PILOT_NOK:------------------------------------------------------- Pilot ERROR. \r\n");
magdamcn 1:31e63b43238f 403 TESTCOUNTER =0;
magdamcn 1:31e63b43238f 404 pc.printf("TESTCOUNTER timer:----------------------------------- %u seconds \r\n", TESTCOUNTER);
magdamcn 1:31e63b43238f 405 stateB_COUNTER =0;
magdamcn 1:31e63b43238f 406 pc.printf("stateB_COUNTER timer:-------------------------------- %u seconds \r\n", stateB_COUNTER);
magdamcn 0:0ba5f6ec8fa5 407 break;
magdamcn 0:0ba5f6ec8fa5 408
magdamcn 0:0ba5f6ec8fa5 409 case PILOT_RESET:
magdamcn 0:0ba5f6ec8fa5 410 contactor = 0;
magdamcn 0:0ba5f6ec8fa5 411 relay = 0;
magdamcn 0:0ba5f6ec8fa5 412 lock = 0;
magdamcn 0:0ba5f6ec8fa5 413 red = 0;
magdamcn 0:0ba5f6ec8fa5 414 green = 0;
magdamcn 0:0ba5f6ec8fa5 415 blue = 1;
magdamcn 0:0ba5f6ec8fa5 416 my_pwm.period_ms(1);
magdamcn 0:0ba5f6ec8fa5 417 my_pwm.pulsewidth_ms(1);
magdamcn 0:0ba5f6ec8fa5 418 my_pwm.write(1);
magdamcn 0:0ba5f6ec8fa5 419 pwm_state = false;
magdamcn 0:0ba5f6ec8fa5 420 pc.printf("RESET IMPLEMENTED. \r\n");
magdamcn 1:31e63b43238f 421 pc.printf("PILOT_RESET:----------------------------------------------------- Pilot at -12V. \r\n");
magdamcn 0:0ba5f6ec8fa5 422 wait(0.5); // 500 ms
magdamcn 1:31e63b43238f 423 blue = 0; // LED is OFF
magdamcn 0:0ba5f6ec8fa5 424 wait(0.2); // 200 ms
magdamcn 1:31e63b43238f 425 TESTCOUNTER =0;
magdamcn 1:31e63b43238f 426 pc.printf("TESTCOUNTER timer:----------------------------------- %u seconds \r\n", TESTCOUNTER);
magdamcn 1:31e63b43238f 427 stateB_COUNTER =0;
magdamcn 1:31e63b43238f 428 pc.printf("stateB_COUNTER timer:-------------------------------- %u seconds \r\n", stateB_COUNTER);
magdamcn 0:0ba5f6ec8fa5 429 use_upper_current = false;
magdamcn 0:0ba5f6ec8fa5 430 break;
magdamcn 0:0ba5f6ec8fa5 431
magdamcn 0:0ba5f6ec8fa5 432 case PWM_CHANGE:
magdamcn 0:0ba5f6ec8fa5 433 lock = 1;
magdamcn 0:0ba5f6ec8fa5 434 contactor = 0;
magdamcn 0:0ba5f6ec8fa5 435 red = 1;
magdamcn 0:0ba5f6ec8fa5 436 green = 1;
magdamcn 0:0ba5f6ec8fa5 437 blue = 1;
magdamcn 0:0ba5f6ec8fa5 438 wait(0.1);
magdamcn 1:31e63b43238f 439 pc.printf("----------------------------------------------------------------- Charger changing PWM. \r\n");
magdamcn 0:0ba5f6ec8fa5 440 my_pwm.period_ms(1);
magdamcn 0:0ba5f6ec8fa5 441 my_pwm.pulsewidth_ms(1);
magdamcn 0:0ba5f6ec8fa5 442 my_pwm.write(1);
magdamcn 0:0ba5f6ec8fa5 443 wait(1);
magdamcn 0:0ba5f6ec8fa5 444 pc.printf("STOPPED PWM - Switching to -12 V. \r\n");
magdamcn 0:0ba5f6ec8fa5 445 my_pwm = 0;
magdamcn 0:0ba5f6ec8fa5 446 pc.printf("STOPPED PWM - Switching to +12 V. \r\n");
magdamcn 0:0ba5f6ec8fa5 447 wait(1);
magdamcn 0:0ba5f6ec8fa5 448 pwm_state = false;
magdamcn 1:31e63b43238f 449 TESTCOUNTER =0;
magdamcn 1:31e63b43238f 450 pc.printf("TESTCOUNTER timer:----------------------------------- %u seconds \r\n", TESTCOUNTER);
magdamcn 1:31e63b43238f 451 stateB_COUNTER =0;
magdamcn 1:31e63b43238f 452 pc.printf("stateB_COUNTER timer:-------------------------------- %u seconds \r\n", stateB_COUNTER);
magdamcn 0:0ba5f6ec8fa5 453 if(use_upper_current == false)
magdamcn 0:0ba5f6ec8fa5 454 {
magdamcn 0:0ba5f6ec8fa5 455 use_upper_current = true;
magdamcn 0:0ba5f6ec8fa5 456 }
magdamcn 0:0ba5f6ec8fa5 457 else
magdamcn 0:0ba5f6ec8fa5 458 {
magdamcn 0:0ba5f6ec8fa5 459 use_upper_current = false;
magdamcn 0:0ba5f6ec8fa5 460 }
magdamcn 1:31e63b43238f 461 break;
magdamcn 1:31e63b43238f 462
magdamcn 1:31e63b43238f 463 case PILOT_START_AGAIN:
magdamcn 1:31e63b43238f 464 red = 1;
magdamcn 1:31e63b43238f 465 green = 0;
magdamcn 1:31e63b43238f 466 blue = 1;
magdamcn 1:31e63b43238f 467 wait(0.1);
magdamcn 1:31e63b43238f 468 pc.printf("Charger:--------------------------------------------------------- RESTARTING stat B - 9V. \r\n");
magdamcn 1:31e63b43238f 469 my_pwm.period_ms(1);
magdamcn 1:31e63b43238f 470 my_pwm.pulsewidth_ms(1);
magdamcn 1:31e63b43238f 471 my_pwm.write(1);
magdamcn 1:31e63b43238f 472 wait(1);
magdamcn 1:31e63b43238f 473 pc.printf("STOPPED PWM - Switching to -12 V. \r\n");
magdamcn 1:31e63b43238f 474 my_pwm = 0;
magdamcn 1:31e63b43238f 475 pc.printf("STOPPED PWM - Switching to +12 V. \r\n");
magdamcn 1:31e63b43238f 476 wait(1);
magdamcn 1:31e63b43238f 477 pwm_state = false;
magdamcn 1:31e63b43238f 478 TESTCOUNTER =0;
magdamcn 1:31e63b43238f 479 pc.printf("TESTCOUNTER timer:----------------------------------- %u seconds \r\n", TESTCOUNTER);
magdamcn 1:31e63b43238f 480 stateB_COUNTER =0;
magdamcn 1:31e63b43238f 481 pc.printf("stateB_COUNTER timer:-------------------------------- %u seconds \r\n", stateB_COUNTER);
magdamcn 1:31e63b43238f 482 break;
magdamcn 1:31e63b43238f 483
magdamcn 1:31e63b43238f 484 }
magdamcn 1:31e63b43238f 485
magdamcn 0:0ba5f6ec8fa5 486 pc.printf("#################\r\n");
magdamcn 0:0ba5f6ec8fa5 487 //wait(1); // wait(); added to slow down the feed from nucleo for easier evaluation
magdamcn 0:0ba5f6ec8fa5 488 }
magdamcn 0:0ba5f6ec8fa5 489 }