/*
* @brief Sets a GPIO pin to HIGH or LOW.
*/
void digitalWrite(pin_t pin, uint8_t value)
{
PinMode mode = HAL_Get_Pin_Mode(pin);
if (mode==PIN_MODE_NONE || is_input_mode(mode))
return;
// Safety check
if( !pinAvailable(pin) ) {
return;
}
HAL_GPIO_Write(pin, value);
}
/*
* @brief Reads the value of a GPIO pin. Should return either 1 (HIGH) or 0 (LOW).
*/
int32_t digitalRead(pin_t pin)
{
PinMode mode = HAL_Get_Pin_Mode(pin);
if (is_af_output_mode(mode))
return LOW;
// Safety check
if( !pinAvailable(pin) ) {
return LOW;
}
return HAL_GPIO_Read(pin);
}
/*
* @brief Set the mode of the pin to OUTPUT, INPUT, INPUT_PULLUP,
* or INPUT_PULLDOWN
*/
void pinMode(uint16_t pin, PinMode setMode)
{
if(pin >= TOTAL_PINS || setMode == PIN_MODE_NONE )
{
return;
}
// Safety check
if( !pinAvailable(pin) ) {
return;
}
HAL_Pin_Mode(pin, setMode);
}
/*
* @brief Should take an integer 0-255 and create a PWM signal with a duty cycle from 0-100%
* and frequency from 1 to 65535 Hz.
*/
void analogWrite(pin_t pin, uint16_t value, uint16_t pwm_frequency)
{
// Safety check
if (!pinAvailable(pin))
{
return;
}
if (HAL_Validate_Pin_Function(pin, PF_TIMER) == PF_TIMER)
{
PinMode mode = HAL_Get_Pin_Mode(pin);
if (mode != OUTPUT && mode != AF_OUTPUT_PUSHPULL)
{
return;
}
HAL_PWM_Write_With_Frequency(pin, value, pwm_frequency);
}
}
/*
* @brief Read the analog value of a pin.
* Should return a 16-bit value, 0-65536 (0 = LOW, 65536 = HIGH)
* Note: ADC is 12-bit. Currently it returns 0-4095
*/
int32_t analogRead(pin_t pin)
{
// Allow people to use 0-7 to define analog pins by checking to see if the values are too low.
if(pin < FIRST_ANALOG_PIN)
{
pin = pin + FIRST_ANALOG_PIN;
}
// Safety check
if( !pinAvailable(pin) ) {
return LOW;
}
if(HAL_Validate_Pin_Function(pin, PF_ADC)!=PF_ADC)
{
return LOW;
}
return HAL_ADC_Read(pin);
}
/*
* @brief Should take an integer 0-255 and create a 500Hz PWM signal with a duty cycle from 0-100%.
* On Photon, DAC1 and DAC2 act as true analog outputs(values: 0 to 4095) using onchip DAC peripheral
*/
void analogWrite(pin_t pin, uint16_t value)
{
// Safety check
if (!pinAvailable(pin))
{
return;
}
if (HAL_Validate_Pin_Function(pin, PF_DAC) == PF_DAC)
{
HAL_DAC_Write(pin, value);
}
else if (HAL_Validate_Pin_Function(pin, PF_TIMER) == PF_TIMER)
{
PinMode mode = HAL_Get_Pin_Mode(pin);
if (mode != OUTPUT && mode != AF_OUTPUT_PUSHPULL)
{
return;
}
HAL_PWM_Write(pin, value);
}
}
void noTone(uint8_t pin)
{
if (pinAvailable(pin) && HAL_Validate_Pin_Function(pin, PF_TIMER)==PF_TIMER) {
HAL_Tone_Stop(pin);
}
}
void tone(uint8_t pin, unsigned int frequency, unsigned long duration)
{
if (pinAvailable(pin) && HAL_Validate_Pin_Function(pin, PF_TIMER)==PF_TIMER) {
HAL_Tone_Start(pin, frequency, duration);
}
}
