Nuvoton / Mbed OS NuMaker-mbed-PWM1_DCservo

NuMaker PWM1 drive +5V DC servo motor

main.cpp@12:c7ca6b6c7fbc, 2021-02-25 (annotated)

Committer:
SHLIU1@OANBE02333.nuvoton.com
Date:
Thu Feb 25 11:24:43 2021 +0800
Revision:
12:c7ca6b6c7fbc
Parent:
9:64a0098bb8df 
Support the both V5.X and V6.X for mbed-os

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rkuo2000 0:68283046ceea 1 // NuMaker-PFM-NUC472 : PWM1 output to drive DC servo motor
rkuo2000 0:68283046ceea 2 #include "mbed.h"
rkuo2000 0:68283046ceea 3
ccli8 9:64a0098bb8df 4 /* NOTE: Most targets has UNO D3 for PWM. Check it for supporting new targets */
ccli8 9:64a0098bb8df 5 PwmOut pwm1(D3);
rkuo2000 0:68283046ceea 6
rkuo2000 0:68283046ceea 7 int main() {
rkuo2000 0:68283046ceea 8
rkuo2000 0:68283046ceea 9 int i=0;
rkuo2000 0:68283046ceea 10 printf("...DCserv Start...\n\r");
SHLIU1@OANBE02333.nuvoton.com 12:c7ca6b6c7fbc 11 #ifdef MBED_MAJOR_VERSION
SHLIU1@OANBE02333.nuvoton.com 12:c7ca6b6c7fbc 12 printf("Mbed OS version %d.%d.%d\r\n\n", MBED_MAJOR_VERSION, MBED_MINOR_VERSION, MBED_PATCH_VERSION);
SHLIU1@OANBE02333.nuvoton.com 12:c7ca6b6c7fbc 13 #endif
rkuo2000 0:68283046ceea 14 pwm1.period_us(20000); // set PWM period to 20ms (50Hz)
rkuo2000 0:68283046ceea 15
rkuo2000 0:68283046ceea 16 for (i=500; i<=2500; i=i+200) { // from 0.5ms to 2.5ms
rkuo2000 0:68283046ceea 17 pwm1.pulsewidth_us(i); // set PWM pulse width to rotate motor
SHLIU1@OANBE02333.nuvoton.com 12:c7ca6b6c7fbc 18 #if MBED_MAJOR_VERSION >= 6
SHLIU1@OANBE02333.nuvoton.com 12:c7ca6b6c7fbc 19 ThisThread::sleep_for(1000);
SHLIU1@OANBE02333.nuvoton.com 12:c7ca6b6c7fbc 20 #else
rkuo2000 0:68283046ceea 21 Thread::wait(1000); // delay
SHLIU1@OANBE02333.nuvoton.com 12:c7ca6b6c7fbc 22 #endif
rkuo2000 0:68283046ceea 23 printf("DCservo pulse width = %d\n\r", i);
rkuo2000 0:68283046ceea 24 }
rkuo2000 0:68283046ceea 25 printf("...DCserv End.....\n\r");
rkuo2000 0:68283046ceea 26 }