ArmfulKST / Mbed 2 deprecated STM32L432PWM1

One of several PWM examples for the STM32L432 nucleo board

Dependencies:   mbed

main.cpp@0:18d54d648967, 2019-03-26 (annotated)

Committer:
f3d
Date:
Tue Mar 26 12:37:18 2019 +0000
Revision:
0:18d54d648967
Simple single channel PWM for the STM32L432KC Nucleo board

Who changed what in which revision?

UserRevisionLine numberNew contents of line
f3d 0:18d54d648967 1 #include "mbed.h"
f3d 0:18d54d648967 2 #include <stm32l432xx.h>
f3d 0:18d54d648967 3
f3d 0:18d54d648967 4
f3d 0:18d54d648967 5 #define PWM_PERIOD_COUNT 1000
f3d 0:18d54d648967 6
f3d 0:18d54d648967 7 /*
f3d 0:18d54d648967 8 For register definitions see here:
f3d 0:18d54d648967 9 https://github.com/ARMmbed/mbed-os/blob/master/targets/TARGET_STM/TARGET_STM32L4/TARGET_STM32L432xC/device/stm32l432xx.h
f3d 0:18d54d648967 10 */
f3d 0:18d54d648967 11 #define BUF_SIZE 99
f3d 0:18d54d648967 12
f3d 0:18d54d648967 13 // Using the MBED libraries to configure the PWM outputs (its easier than
f3d 0:18d54d648967 14 // calculating all of the register contents by hand)
f3d 0:18d54d648967 15 DigitalOut myled(LED1);
f3d 0:18d54d648967 16 PwmOut PhaATop(PA_8);
f3d 0:18d54d648967 17
f3d 0:18d54d648967 18 void initTimer1()
f3d 0:18d54d648967 19 {
f3d 0:18d54d648967 20
f3d 0:18d54d648967 21 TIM1->CR1 = 0; // make sure Counter is disabled before changing configuration
f3d 0:18d54d648967 22 TIM1->CR2 = 0;
f3d 0:18d54d648967 23 TIM1->PSC = 1;
f3d 0:18d54d648967 24 TIM1->ARR = PWM_PERIOD_COUNT;
f3d 0:18d54d648967 25 TIM1->CCR1 = PWM_PERIOD_COUNT/4; // 25% duty
f3d 0:18d54d648967 26 // Enable channel 1
f3d 0:18d54d648967 27 TIM1->CCER = 1;
f3d 0:18d54d648967 28 TIM1->SR = 0; // Clear flags.
f3d 0:18d54d648967 29 TIM1->CR1 |= 1; // enable counter
f3d 0:18d54d648967 30
f3d 0:18d54d648967 31 }
f3d 0:18d54d648967 32
f3d 0:18d54d648967 33 int main() {
f3d 0:18d54d648967 34
f3d 0:18d54d648967 35 initTimer1();
f3d 0:18d54d648967 36 while(1) {
f3d 0:18d54d648967 37
f3d 0:18d54d648967 38 }
f3d 0:18d54d648967 39 }