/*
All-in-one setPWM
This example shows how to configure a PWM with HardwareTimer in one single function call.
PWM is generated on `LED_BUILTIN` if available.
No interruption callback used: PWM is generated by hardware.
Once configured, there is no CPU load.
*/
/*
Note: Please verify that 'pin' used for PWM has HardwareTimer capability for your board
This is specially true for F1 serie (BluePill, ...)
*/
#if defined(LED_BUILTIN)
#define pin LED_BUILTIN
#else
#define pin D2
#endif
void setup()
{
// no need to configure pin, it will be done by HardwareTimer configuration
// pinMode(pin, OUTPUT);
// Automatically retrieve TIM instance and channel associated to pin
// This is used to be compatible with all STM32 series automatically.
TIM_TypeDef *Instance = (TIM_TypeDef *)pinmap_peripheral(digitalPinToPinName(pin), PinMap_PWM);
uint32_t channel = STM_PIN_CHANNEL(pinmap_function(digitalPinToPinName(pin), PinMap_PWM));
// Instantiate HardwareTimer object. Thanks to 'new' instantiation, HardwareTimer is not destructed when setup() function is finished.
HardwareTimer *MyTim = new HardwareTimer(Instance);
// Configure and start PWM
// MyTim->setPWM(channel, pin, 5, 10, NULL, NULL); // No callback required, we can simplify the function call
MyTim->setPWM(channel, pin, 5, 10); // 5 Hertz, 10% dutycycle
}
void loop()
{
/* Nothing to do all is done by hardware. Even no interrupt required. */
}
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