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# 8. Устройство управления контроллером ШИМ.
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### TODO:
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- ### Перетащить проект в Microchip Studio, вынести все .h и .c файлы по проекту
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## Описание
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### Устройство представляет из себя I2C ведущее устройство.
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272
demo.c
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272
demo.c
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#define F_CPU 16000000UL
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#define I2C_FREQ 100000UL
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#define I2C_PRESCALER 1
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#define I2C_BITRATE ((F_CPU / I2C_FREQ) - 16) / (2 * I2C_PRESCALER)
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <util/delay.h>
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float pwm_frequency = 1.0;
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uint8_t pwm_duty_cycle = 50;
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volatile uint8_t pwm_enabled = 0;
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volatile uint8_t pwm_changed = 0;
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void i2c_init() {
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TWBR = I2C_BITRATE;
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}
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void i2c_start() {
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TWCR = (1 << TWINT) | (1 << TWSTA) | (1 << TWEN);
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while (!(TWCR & (1 << TWINT)))
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;
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}
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void i2c_stop() {
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TWCR = (1 << TWINT) | (1 << TWSTO) | (1 << TWEN);
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while (TWCR & (1 << TWSTO))
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;
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}
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void i2c_write(uint8_t data) {
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TWDR = data;
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TWCR = (1 << TWINT) | (1 << TWEN);
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while (!(TWCR & (1 << TWINT)))
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;
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}
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uint8_t i2c_read_ack() {
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TWCR = (1 << TWINT) | (1 << TWEN) | (1 << TWEA);
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while (!(TWCR & (1 << TWINT)))
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;
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return TWDR;
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}
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uint8_t i2c_read_nack() {
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TWCR = (1 << TWINT) | (1 << TWEN);
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while (!(TWCR & (1 << TWINT)))
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;
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return TWDR;
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}
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const uint8_t PWM_SLAVE_ADDR = 9;
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void pwm_enable() {
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pwm_enabled = 1;
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pwm_changed = 1;
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}
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void pwm_disable() {
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pwm_enabled = 0;
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pwm_changed = 1;
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}
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void setPWMFrequency(float frequency) {
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if (frequency < 0 || frequency > 50000.0) {
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return; // Недопустимая частота
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}
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pwm_frequency = frequency;
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pwm_changed = 1;
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}
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void setPWMDutyCycle(float duty_cycle) {
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if (duty_cycle < 1 || duty_cycle > 100) {
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return; // Недопустимый коэффициент заполнения
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}
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pwm_duty_cycle = duty_cycle;
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pwm_changed = 1;
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}
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void pwm_check_state() {
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if (pwm_enabled) {
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// Включаем пин ШИМ - реализация зависит от аппаратной платформы
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Serial.print("PWM enabled. Frequency: ");
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Serial.print(pwm_frequency);
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Serial.print(" Hz, duty cycle: ");
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Serial.println(pwm_duty_cycle);
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} else {
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// Выключаем пин ШИМ - реализация зависит от аппаратной платформы
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Serial.println("PWM disabled");
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}
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}
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void pwm_set_frequency(float frequency) {
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// Устанавливаем частоту ШИМ - реализация зависит от аппаратной платформы
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Serial.print("Setting PWM frequency to: ");
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Serial.println(frequency);
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}
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void pwm_set_duty_cycle(float duty_cycle) {
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// Устанавливаем коэффициент заполнения ШИМ - реализация зависит от аппаратной платформы
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Serial.print("Setting PWM duty cycle to: ");
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Serial.println(duty_cycle);
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}
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void enablePWM() {
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pwm_enable();
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// Включаем ШИМ
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sendCommand(0x01, 0.0);
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}
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void disablePWM() {
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// Выключаем ШИМ
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sendCommand(0x02, 0.0);
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pwm_disable();
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}
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void increaseFrequency() {
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setPWMFrequency(pwm_frequency * 1.25);
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// Выключаем ШИМ, отправляем команду и включаем обратно
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disablePWM();
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sendCommand(0x03, pwm_frequency);
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enablePWM();
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}
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void decreaseFrequency() {
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setPWMFrequency(pwm_frequency * 0.8);
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// Выключаем ШИМ, отправляем команду и включаем обратно
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disablePWM();
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sendCommand(0x04, pwm_frequency);
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enablePWM();
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}
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void increaseDutyCycle() {
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if (pwm_duty_cycle < 100) {
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pwm_duty_cycle+=10;
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setPWMDutyCycle(pwm_duty_cycle);
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// Выключаем ШИМ, отправляем команду и включаем обратно
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disablePWM();
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sendCommand(0x05, pwm_duty_cycle);
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enablePWM();
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} else {
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Serial.println("Maximum duty cycle reached!");
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}
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}
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void decreaseDutyCycle() {
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if (pwm_duty_cycle > 1) {
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pwm_duty_cycle-=10;
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setPWMDutyCycle(pwm_duty_cycle);
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// Выключаем ШИМ, отправляем команду и включаем обратно
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disablePWM();
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sendCommand(0x06, pwm_duty_cycle);
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enablePWM();
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} else {
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Serial.println("Minimum duty cycle reached!");
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}
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}
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void checkButton(uint8_t pin, const char* message, void (*command)()) {
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if (bit_is_clear(PINC, pin)) {
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Serial.println(message);
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delay(200);
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command();
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}
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// Обновляем состояние ШИМ, если что-то изменилось
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if (pwm_changed) {
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pwm_changed = 0;
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pwm_check_state();
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if (pwm_enabled) {
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pwm_set_frequency(pwm_frequency);
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pwm_set_duty_cycle(pwm_duty_cycle);
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}
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}
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}
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void setup() {
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i2c_init();
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DDRC &= ~(1 << PINC0) & ~(1 << PINC1) & ~(1 << PINC2) & ~(1 << PINC3) & ~(1 << PINC4) & ~(1 << PINC5);
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PORTC |= (1 << PINC0) | (1 << PINC1) | (1 << PINC2) | (1 << PINC3) | (1 << PINC4) | (1 << PINC5);
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Serial.begin(9600);
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Serial.println("PWM Controller started!");
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sendCommand(0x01, 0.0);
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}
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void loop() {
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checkButton(0, "Turn on PWM!", enablePWM);
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checkButton(1, "Turn off PWM!", disablePWM);
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checkButton(2, "Increase frequency by 25%!", increaseFrequency);
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checkButton(3, "Decrease frequency by 20%!", decreaseFrequency);
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checkButton(4, "Increase duty cycle by 10%!", increaseDutyCycle);
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checkButton(5, "Decrease duty cycle by 10%!", decreaseDutyCycle);
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}
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void sendCommand(uint8_t cmd, float value) {
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uint16_t cmd_value;
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switch (cmd) {
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case 0x01:
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case 0x02:
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sendCommandOneByte(cmd);
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break;
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case 0x03:
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case 0x04:
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sendCommandThreeBytes(cmd, value);
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break;
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case 0x05:
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case 0x06:
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sendCommandTwoBytes(cmd, value);
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break;
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default:
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Serial.println("Unknown command");
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break;
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}
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}
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void sendCommandOneByte(uint8_t cmd) {
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i2c_start();
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i2c_write(PWM_SLAVE_ADDR << 1);
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i2c_write(cmd);
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i2c_stop();
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Serial.print("Sent command: 0x");
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Serial.println(cmd, HEX);
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}
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void sendCommandTwoBytes(uint8_t cmd, float value) {
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uint16_t cmd_value = round(value);
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i2c_start();
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i2c_write(PWM_SLAVE_ADDR << 1);
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i2c_write(cmd);
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i2c_write(cmd_value & 0xFF);
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i2c_stop();
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Serial.print("Sent command: 0x");
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Serial.print(cmd, HEX);
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Serial.print(", value: ");
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Serial.print(value);
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Serial.print(", cmd value: ");
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Serial.print(cmd_value);
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Serial.print(", data bytes: 0x");
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Serial.println(cmd_value & 0xFF, HEX);
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}
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void sendCommandThreeBytes(uint8_t cmd, float value) {
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uint16_t cmd_value = round(value * 16); // приводим к 12 бит и 4 бита дробной части
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uint8_t data_bytes[2] = {(cmd_value >> 8) & 0xFF, cmd_value & 0xFF};
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i2c_start();
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i2c_write(PWM_SLAVE_ADDR << 1);
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i2c_write(cmd);
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i2c_write(data_bytes[0]);
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i2c_write(data_bytes[1]);
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i2c_stop();
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Serial.print("Sent command: 0x");
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Serial.print(cmd, HEX);
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Serial.print(", value: ");
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Serial.print(value);
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Serial.print(", cmd value: ");
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Serial.print(cmd_value);
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Serial.print(", data bytes: 0x");
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Serial.print(data_bytes[0], HEX);
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Serial.print(" ");
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Serial.println(data_bytes[1], HEX);
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}
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38
i2c.c
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38
i2c.c
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#include "i2c.h"
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void i2c_init() {
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TWBR = I2C_BITRATE;
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}
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void i2c_start() {
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TWCR = (1 << TWINT) | (1 << TWSTA) | (1 << TWEN);
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while (!(TWCR & (1 << TWINT)))
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;
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}
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void i2c_stop() {
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TWCR = (1 << TWINT) | (1 << TWSTO) | (1 << TWEN);
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while (TWCR & (1 << TWSTO))
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;
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}
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void i2c_write(uint8_t data) {
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TWDR = data;
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TWCR = (1 << TWINT) | (1 << TWEN);
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while (!(TWCR & (1 << TWINT)))
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;
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}
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uint8_t i2c_read_ack() {
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TWCR = (1 << TWINT) | (1 << TWEN) | (1 << TWEA);
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while (!(TWCR & (1 << TWINT)))
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;
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return TWDR;
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}
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uint8_t i2c_read_nack() {
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TWCR = (1 << TWINT) | (1 << TWEN);
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while (!(TWCR & (1 << TWINT)))
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;
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return TWDR;
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}
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18
i2c.h
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18
i2c.h
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#ifndef I2C_H
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#define I2C_H
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#include <avr/io.h>
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#define F_CPU 16000000UL
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#define I2C_FREQ 100000UL
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#define I2C_PRESCALER 1
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#define I2C_BITRATE ((F_CPU / I2C_FREQ) - 16) / (2 * I2C_PRESCALER)
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void i2c_init();
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void i2c_start();
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void i2c_stop();
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void i2c_write(uint8_t data);
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uint8_t i2c_read_ack();
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uint8_t i2c_read_nack();
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#endif
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165
main.c
165
main.c
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#define F_CPU 16000000UL
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#define I2C_FREQ 100000UL
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#define I2C_PRESCALER 1
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#define I2C_BITRATE ((F_CPU / I2C_FREQ) - 16) / (2 * I2C_PRESCALER)
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <util/delay.h>
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float pwm_frequency = 1.0;
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uint8_t pwm_duty_cycle = 50;
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volatile uint8_t pwm_enabled = 0;
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volatile uint8_t pwm_changed = 0;
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void i2c_init() {
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TWBR = I2C_BITRATE;
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}
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void i2c_start() {
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TWCR = (1 << TWINT) | (1 << TWSTA) | (1 << TWEN);
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while (!(TWCR & (1 << TWINT)))
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;
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}
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void i2c_stop() {
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TWCR = (1 << TWINT) | (1 << TWSTO) | (1 << TWEN);
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while (TWCR & (1 << TWSTO))
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;
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}
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void i2c_write(uint8_t data) {
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TWDR = data;
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TWCR = (1 << TWINT) | (1 << TWEN);
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while (!(TWCR & (1 << TWINT)))
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;
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}
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uint8_t i2c_read_ack() {
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TWCR = (1 << TWINT) | (1 << TWEN) | (1 << TWEA);
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while (!(TWCR & (1 << TWINT)))
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;
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return TWDR;
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}
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uint8_t i2c_read_nack() {
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TWCR = (1 << TWINT) | (1 << TWEN);
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while (!(TWCR & (1 << TWINT)))
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;
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return TWDR;
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}
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#include "pwm.h"
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const uint8_t PWM_SLAVE_ADDR = 9;
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void pwm_enable() {
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pwm_enabled = 1;
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pwm_changed = 1;
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}
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void pwm_disable() {
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pwm_enabled = 0;
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pwm_changed = 1;
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}
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void setPWMFrequency(float frequency) {
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if (frequency < 0 || frequency > 50000.0) {
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return; // Недопустимая частота
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}
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pwm_frequency = frequency;
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pwm_changed = 1;
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}
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void setPWMDutyCycle(float duty_cycle) {
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if (duty_cycle < 1 || duty_cycle > 100) {
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return; // Недопустимый коэффициент заполнения
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}
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pwm_duty_cycle = duty_cycle;
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pwm_changed = 1;
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}
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void pwm_check_state() {
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if (pwm_enabled) {
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// Включаем пин ШИМ - реализация зависит от аппаратной платформы
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Serial.print("PWM enabled. Frequency: ");
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Serial.print(pwm_frequency);
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Serial.print(" Hz, duty cycle: ");
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Serial.println(pwm_duty_cycle);
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} else {
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// Выключаем пин ШИМ - реализация зависит от аппаратной платформы
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Serial.println("PWM disabled");
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}
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}
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void pwm_set_frequency(float frequency) {
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// Устанавливаем частоту ШИМ - реализация зависит от аппаратной платформы
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Serial.print("Setting PWM frequency to: ");
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Serial.println(frequency);
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}
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void pwm_set_duty_cycle(float duty_cycle) {
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// Устанавливаем коэффициент заполнения ШИМ - реализация зависит от аппаратной платформы
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Serial.print("Setting PWM duty cycle to: ");
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Serial.println(duty_cycle);
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}
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void enablePWM() {
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pwm_enable();
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// Включаем ШИМ
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sendCommand(0x01, 0.0);
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}
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void disablePWM() {
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// Выключаем ШИМ
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sendCommand(0x02, 0.0);
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pwm_disable();
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}
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void increaseFrequency() {
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setPWMFrequency(pwm_frequency * 1.25);
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// Выключаем ШИМ, отправляем команду и включаем обратно
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disablePWM();
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sendCommand(0x03, pwm_frequency);
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enablePWM();
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}
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void decreaseFrequency() {
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setPWMFrequency(pwm_frequency * 0.8);
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// Выключаем ШИМ, отправляем команду и включаем обратно
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disablePWM();
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sendCommand(0x04, pwm_frequency);
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enablePWM();
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}
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void increaseDutyCycle() {
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if (pwm_duty_cycle < 100) {
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||||
pwm_duty_cycle+=10;
|
||||
setPWMDutyCycle(pwm_duty_cycle);
|
||||
// Выключаем ШИМ, отправляем команду и включаем обратно
|
||||
disablePWM();
|
||||
sendCommand(0x05, pwm_duty_cycle);
|
||||
enablePWM();
|
||||
} else {
|
||||
Serial.println("Maximum duty cycle reached!");
|
||||
}
|
||||
}
|
||||
|
||||
void decreaseDutyCycle() {
|
||||
|
||||
if (pwm_duty_cycle > 1) {
|
||||
pwm_duty_cycle-=10;
|
||||
setPWMDutyCycle(pwm_duty_cycle);
|
||||
// Выключаем ШИМ, отправляем команду и включаем обратно
|
||||
disablePWM();
|
||||
sendCommand(0x06, pwm_duty_cycle);
|
||||
enablePWM();
|
||||
} else {
|
||||
Serial.println("Minimum duty cycle reached!");
|
||||
}
|
||||
}
|
||||
|
||||
void checkButton(uint8_t pin, const char* message, void (*command)()) {
|
||||
if (bit_is_clear(PINC, pin)) {
|
||||
Serial.println(message);
|
||||
delay(200);
|
||||
command();
|
||||
}
|
||||
}
|
||||
|
||||
void setup() {
|
||||
i2c_init();
|
||||
DDRC &= ~(1 << PINC0) & ~(1 << PINC1) & ~(1 << PINC2) & ~(1 << PINC3) & ~(1 << PINC4) & ~(1 << PINC5);
|
||||
@ -183,7 +22,6 @@ void loop() {
|
||||
checkButton(4, "Increase duty cycle by 10%!", increaseDutyCycle);
|
||||
checkButton(5, "Decrease duty cycle by 10%!", decreaseDutyCycle);
|
||||
|
||||
// Обновляем состояние ШИМ, если что-то изменилось
|
||||
if (pwm_changed) {
|
||||
pwm_changed = 0;
|
||||
pwm_check_state();
|
||||
@ -194,7 +32,6 @@ void loop() {
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void sendCommand(uint8_t cmd, float value) {
|
||||
uint16_t cmd_value;
|
||||
|
||||
|
58
pwm.c
Normal file
58
pwm.c
Normal file
@ -0,0 +1,58 @@
|
||||
#include "pwm.h"
|
||||
|
||||
float pwm_frequency = 1.0;
|
||||
uint8_t pwm_duty_cycle = 50;
|
||||
|
||||
volatile uint8_t pwm_enabled = 0;
|
||||
volatile uint8_t pwm_changed = 0;
|
||||
|
||||
void pwm_enable() {
|
||||
pwm_enabled = 1;
|
||||
pwm_changed = 1;
|
||||
}
|
||||
|
||||
void pwm_disable() {
|
||||
pwm_enabled = 0;
|
||||
pwm_changed = 1;
|
||||
}
|
||||
|
||||
void setPWMFrequency(float frequency) {
|
||||
if (frequency < 0 || frequency > 50000.0) {
|
||||
return; // Недопустимая частота
|
||||
}
|
||||
pwm_frequency = frequency;
|
||||
pwm_changed = 1;
|
||||
}
|
||||
|
||||
void setPWMDutyCycle(float duty_cycle) {
|
||||
if (duty_cycle < 1 || duty_cycle > 100) {
|
||||
return; // Недопустимый коэффициент заполнения
|
||||
}
|
||||
pwm_duty_cycle = duty_cycle;
|
||||
pwm_changed = 1;
|
||||
}
|
||||
|
||||
void pwm_check_state() {
|
||||
if (pwm_enabled) {
|
||||
// Включаем пин ШИМ - реализация зависит от аппаратной платформы
|
||||
Serial.print("PWM enabled. Frequency: ");
|
||||
Serial.print(pwm_frequency);
|
||||
Serial.print(" Hz, duty cycle: ");
|
||||
Serial.println(pwm_duty_cycle);
|
||||
} else {
|
||||
// Выключаем пин ШИМ - реализация зависит от аппаратной платформы
|
||||
Serial.println("PWM disabled");
|
||||
}
|
||||
}
|
||||
|
||||
void pwm_set_frequency(float frequency) {
|
||||
// Устанавливаем частоту ШИМ - реализация зависит от аппаратной платформы
|
||||
Serial.print("Setting PWM frequency to: ");
|
||||
Serial.println(frequency);
|
||||
}
|
||||
|
||||
void pwm_set_duty_cycle(float duty_cycle) {
|
||||
// Устанавливаем коэффициент заполнения ШИМ - реализация зависит от аппаратной платформы
|
||||
Serial.print("Setting PWM duty cycle to: ");
|
||||
Serial.println(duty_cycle);
|
||||
}
|
33
pwm.h
Normal file
33
pwm.h
Normal file
@ -0,0 +1,33 @@
|
||||
#ifndef PWM_H
|
||||
#define PWM_H
|
||||
|
||||
#include <avr/io.h>
|
||||
#include "i2c.h"
|
||||
|
||||
extern float pwm_frequency;
|
||||
extern uint8_t pwm_duty_cycle;
|
||||
|
||||
extern volatile uint8_t pwm_enabled;
|
||||
extern volatile uint8_t pwm_changed;
|
||||
|
||||
void pwm_enable();
|
||||
void pwm_disable();
|
||||
void setPWMFrequency(float frequency);
|
||||
void setPWMDutyCycle(float duty_cycle);
|
||||
void pwm_check_state();
|
||||
void pwm_set_frequency(float frequency);
|
||||
void pwm_set_duty_cycle(float duty_cycle);
|
||||
|
||||
void enablePWM();
|
||||
void disablePWM();
|
||||
void increaseFrequency();
|
||||
void decreaseFrequency();
|
||||
void increaseDutyCycle();
|
||||
void decreaseDutyCycle();
|
||||
void checkButton(uint8_t pin, const char* message, void (*command)());
|
||||
void sendCommand(uint8_t cmd, float value);
|
||||
void sendCommandOneByte(uint8_t cmd);
|
||||
void sendCommandTwoBytes(uint8_t cmd, float value);
|
||||
void sendCommandThreeBytes(uint8_t cmd, float value);
|
||||
|
||||
#endif
|
Loading…
Reference in New Issue
Block a user