main.cpp

00001 #include "mbed.h"
00002 #include <stm32l432xx.h>
00003 
00004 
00005 #define PWM_PERIOD_COUNT 1000
00006 
00007 /*
00008 For register definitions see here:
00009 https://github.com/ARMmbed/mbed-os/blob/master/targets/TARGET_STM/TARGET_STM32L4/TARGET_STM32L432xC/device/stm32l432xx.h
00010 */
00011 
00012 // Using the MBED libraries to configure the PWM outputs (its easier than 
00013 // calculating all of the register contents by hand)
00014 DigitalOut myled(LED1);
00015 PwmOut  PhaATop(PA_8); 
00016 PwmOut  PhaABottom(PA_7);
00017 void initTimer1()
00018 {    
00019     
00020     TIM1->CR1 = 0; // make sure Counter is disabled before changing configuration
00021     TIM1->CR2 = 0;
00022     TIM1->PSC = 1;
00023     TIM1->ARR = PWM_PERIOD_COUNT;
00024     TIM1->CCR1 = PWM_PERIOD_COUNT/4; // 25% duty
00025     // Enable channel 1 and its complimentary output
00026     TIM1->CCER = (1 << 0) + (1 << 2);
00027     TIM1->SR = 0;      // Clear flags.    
00028     TIM1->CR1 |= 1; // enable counter
00029 
00030 }
00031 
00032 int main() {    
00033    
00034     initTimer1();
00035     while(1) {
00036        
00037     }
00038 }