102 lines
2.2 KiB
C++
102 lines
2.2 KiB
C++
#include "TeensyPwm.h"
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#include <stdint.h>
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#include <LiquidCrystal.h>
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#include "control.h"
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#include "hardware.h"
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#include "ctrlParams.h"
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volatile float U_des = 14.0;
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volatile Control ctrl((float)PWM_MIN, (float)PWM_MAX, Ctrl_P, Ctrl_I, Ctrl_D);
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LiquidCrystal lcd(LCD_RS, LCD_E, LCD_D4, LCD_D5, LCD_D6, LCD_D7);
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const uint32_t DISPLAY_UPDATE_TIME = 5e5; // microseconds
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volatile uint32_t lastCycle = 0;
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volatile float u_curr = 0;
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volatile uint16_t newPwm = 0;
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volatile uint32_t cycleDelay = 0;
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volatile uint32_t maxCycleDelay = 0;
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void cycle() {
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static uint32_t cycles = 0;
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if (cycles >= CYCLE_DIV) {
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cycles = 0;
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uint32_t currentTime = micros();
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cycleDelay = currentTime - lastCycle;
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if (cycleDelay > maxCycleDelay) {
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maxCycleDelay = cycleDelay;
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}
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lastCycle = currentTime;
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uint16_t adcIn = analogRead(ADC_IN);
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float u_adc = ((float)adcIn) * U_ref / ((float)ADC_MAX);
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u_curr = u_adc * (R_top + R_bottom) / R_bottom;
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float newPwm_f = ctrl.cycle(U_des, u_curr);
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newPwm = (uint16_t) newPwm_f;
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analogWrite(PWM_PIN, newPwm);
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}
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cycles++;
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}
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void setup() {
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lcd.begin(LCD_COLS, LCD_ROWS);
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lcd.print("Teensy SMPS");
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pinMode(PWM_PIN, OUTPUT);
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analogWrite(PWM_PIN, PWM_MIN);
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analogWriteFrequency(PWM_PIN, PWM_FREQ);
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analogWriteResolution(PWM_RES);
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pinMode(PWM_LOOPBACK, INPUT);
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attachInterrupt(PWM_LOOPBACK, cycle, RISING);
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analogReadResolution(ADC_RES);
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analogReference(DEFAULT);
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if (ADC_AVG != 0) {
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analogReadAveraging(ADC_AVG);
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}
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pinMode(ADC_IN, INPUT);
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}
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void loop() {
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static uint32_t lastDisplayCycle = 0;
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static uint32_t cycleCnt = 0;
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uint32_t currentTime = micros();
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if ((lastDisplayCycle + DISPLAY_UPDATE_TIME <= currentTime) || (lastDisplayCycle > currentTime)) {
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lastDisplayCycle = currentTime;
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cycleCnt++;
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if (cycleCnt == 60) {
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maxCycleDelay = 0;
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}
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noInterrupts();
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float my_u_curr = u_curr;
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uint16_t my_newPwm = newPwm;
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uint32_t my_cycleDelay = cycleDelay;
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interrupts();
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lcd.clear();
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lcd.setCursor(0, 0);
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lcd.print(U_des);
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lcd.setCursor(8, 0);
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lcd.print(my_u_curr);
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lcd.setCursor(0, 1);
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lcd.print(maxCycleDelay);
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float dutyCycle = ((float)my_newPwm) / ((float)PWM_MAX) * 100.0;
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lcd.print(" ");
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lcd.print(my_cycleDelay);
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lcd.print(" ");
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lcd.print(dutyCycle);
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lcd.print("%");
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}
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}
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