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 #define BUF_SIZE 99
00012 
00013 // Using the MBED libraries to configure the PWM outputs (its easier than 
00014 // calculating all of the register contents by hand)
00015 DigitalOut myled(LED1);
00016 PwmOut  PhaATop(PA_8); 
00017 
00018 void initTimer1()
00019 {    
00020     
00021     TIM1->CR1 = 0; // make sure Counter is disabled before changing configuration
00022     TIM1->CR2 = 0;
00023     TIM1->PSC = 1;
00024     TIM1->ARR = PWM_PERIOD_COUNT;
00025     TIM1->CCR1 = PWM_PERIOD_COUNT/4; // 25% duty
00026     // Enable channel 1
00027     TIM1->CCER = 1;
00028     TIM1->SR = 0;      // Clear flags.    
00029     TIM1->CR1 |= 1; // enable counter
00030 
00031 }
00032 
00033 int main() {    
00034    
00035     initTimer1();
00036     while(1) {
00037        
00038     }
00039 }