- /*
- 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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