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Trace: • STM32 Control of built-in LEDs with PWM • IoT Networks: Laboratory 3 - CoAP • Bluetooth Low Energy for STM32 - peripheral write • ESP32 BLE in Arduino. Part2: Setting-up BLE Server • Zephyr BLE peripheral • Laboratory on GPIO use in Zephyr OS • ESP32 BLE in Arduino. Part1: Setting-up BLE Beacon • Laboratory on the Internet of Things - Advanced IoT Hardware - on-site edition • nRF52840 Zephyr BLE client • Zephyr Beacon example
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en:edu:zmitac:s2:aih:lab:stm32pwm

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en:edu:zmitac:s2:aih:lab:stm32pwm [2024/01/13 18:47] – ktokarzen:edu:zmitac:s2:aih:lab:stm32pwm [2024/01/16 09:11] (current) – ktokarz
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 </table> </table>
 At the beginning of the code, there is a definition of pin value. Although the P-Nucleo-WB55 has the LED_BUILTIN defined it can't work as the PMW timer output. We have to override it. At the beginning of the code, there is a definition of pin value. Although the P-Nucleo-WB55 has the LED_BUILTIN defined it can't work as the PMW timer output. We have to override it.
-<code>+<code c>
 // ********************************************************* // *********************************************************
 #define LED_BUILTIN D6 //Override of the default LED_BUILTIN #define LED_BUILTIN D6 //Override of the default LED_BUILTIN
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 </code> </code>
 In the setup part of the code, the program automatically retrieves the timer instance and PWM channel number connected to the previously defined pin. In the setup part of the code, the program automatically retrieves the timer instance and PWM channel number connected to the previously defined pin.
-<code>+<code c>
   TIM_TypeDef *Instance = (TIM_TypeDef *)pinmap_peripheral(digitalPinToPinName(pin), PinMap_PWM);   TIM_TypeDef *Instance = (TIM_TypeDef *)pinmap_peripheral(digitalPinToPinName(pin), PinMap_PWM);
   uint32_t channel = STM_PIN_CHANNEL(pinmap_function(digitalPinToPinName(pin), PinMap_PWM));   uint32_t channel = STM_PIN_CHANNEL(pinmap_function(digitalPinToPinName(pin), PinMap_PWM));
 </code> </code>
 While having information on the timer instance and channel number it instantiates the HardwareTimer object. While having information on the timer instance and channel number it instantiates the HardwareTimer object.
-<code>+<code c>
  HardwareTimer *MyTim = new HardwareTimer(Instance);  HardwareTimer *MyTim = new HardwareTimer(Instance);
 </code> </code>
 The setup function oi finished with starting the timer to operate in PMW mode and configuring the PWM signal with frequency and duty cycle. The setup function oi finished with starting the timer to operate in PMW mode and configuring the PWM signal with frequency and duty cycle.
-<code>+<code c>
   MyTim->setPWM(channel, pin, 5, 10); // 5 Hertz, 10% dutycycle   MyTim->setPWM(channel, pin, 5, 10); // 5 Hertz, 10% dutycycle
 </code> </code>
 It is possible to modify the duty cycle by changing the current value of the capture and compare register for specified channel. To do it we need to use the function. It is possible to modify the duty cycle by changing the current value of the capture and compare register for specified channel. To do it we need to use the function.
-<code>+<code c>
   MyTim->setCaptureCompare(channel, 50, PERCENT_COMPARE_FORMAT); // 50%   MyTim->setCaptureCompare(channel, 50, PERCENT_COMPARE_FORMAT); // 50%
 </code> </code>
 +
en/edu/zmitac/s2/aih/lab/stm32pwm.1705168045.txt.gz · Last modified: by ktokarz