You down with EET. Yea, you know C / Mbed 2 deprecated DISCO_SMT32L4_pwm_PB3

final project update

Dependencies:   mbed

Fork of DISCO_SMT32L4_pwm_PB3 by Josh Blackann

main.cpp@3:9aa9bfe031bb, 2018-03-19 (annotated)

Committer:
jblackann
Date:
Mon Mar 19 20:01:16 2018 +0000
Revision:
3:9aa9bfe031bb
Parent:
0:4860a91fb495
Child:
4:9d26d117fa69
PWM on the STM32L4 Discovery board with on PB3.  Counts up to 100% and then down to 0 and repeats

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bcostm 0:4860a91fb495 1 #include "mbed.h"
bcostm 0:4860a91fb495 2
bcostm 0:4860a91fb495 3 PwmOut mypwm(PWM_OUT);
bcostm 0:4860a91fb495 4
bcostm 0:4860a91fb495 5 DigitalOut myled(LED1);
bcostm 0:4860a91fb495 6
jblackann 3:9aa9bfe031bb 7 #define UP 1
jblackann 3:9aa9bfe031bb 8 #define DOWN 2
jblackann 3:9aa9bfe031bb 9
bcostm 0:4860a91fb495 10 int main() {
bcostm 0:4860a91fb495 11
jblackann 3:9aa9bfe031bb 12 uint8_t i;
jblackann 3:9aa9bfe031bb 13 uint8_t count_dir;
jblackann 3:9aa9bfe031bb 14
jblackann 3:9aa9bfe031bb 15
bcostm 0:4860a91fb495 16 mypwm.period_ms(10);
bcostm 0:4860a91fb495 17 mypwm.pulsewidth_ms(1);
bcostm 0:4860a91fb495 18
bcostm 0:4860a91fb495 19 printf("pwm set to %.2f %%\n", mypwm.read() * 100);
bcostm 0:4860a91fb495 20
jblackann 3:9aa9bfe031bb 21 count_dir = UP;
bcostm 0:4860a91fb495 22 while(1) {
bcostm 0:4860a91fb495 23 myled = !myled;
jblackann 3:9aa9bfe031bb 24 for(i = 0; i < 10; i++ )
jblackann 3:9aa9bfe031bb 25 {
jblackann 3:9aa9bfe031bb 26 wait(0.1);
jblackann 3:9aa9bfe031bb 27 if(count_dir == UP)
jblackann 3:9aa9bfe031bb 28 {
jblackann 3:9aa9bfe031bb 29 mypwm = mypwm + 0.01;
jblackann 3:9aa9bfe031bb 30 if(mypwm == 1.00) // if hit one, start counting down
jblackann 3:9aa9bfe031bb 31 {
jblackann 3:9aa9bfe031bb 32 count_dir = DOWN;
jblackann 3:9aa9bfe031bb 33 }
jblackann 3:9aa9bfe031bb 34 }
jblackann 3:9aa9bfe031bb 35 else if(count_dir == DOWN)
jblackann 3:9aa9bfe031bb 36 {
jblackann 3:9aa9bfe031bb 37 mypwm = mypwm - 0.01;
jblackann 3:9aa9bfe031bb 38 if(mypwm == 0.0) // if hit zero, start counting up
jblackann 3:9aa9bfe031bb 39 {
jblackann 3:9aa9bfe031bb 40 count_dir = UP;
jblackann 3:9aa9bfe031bb 41 }
jblackann 3:9aa9bfe031bb 42 }
jblackann 3:9aa9bfe031bb 43
jblackann 3:9aa9bfe031bb 44 }
jblackann 3:9aa9bfe031bb 45 printf("pwm set to %.2f %%\n\r", mypwm.read() * 100);
bcostm 0:4860a91fb495 46 }
bcostm 0:4860a91fb495 47 }