test
Dependencies: mbed
main.cpp
00001 #include "mbed.h" 00002 #define pwm_period_us 500 00003 //#define pwm_pulsewidth_us 400 00004 //實驗說明:利用鍵盤+-符號來控制馬達速度 00005 PwmOut pwm_1(D9); 00006 PwmOut pwm_2(D10); 00007 PwmOut pwm_3(D11); 00008 float pwm = 0.5; 00009 DigitalIn button(USER_BUTTON); 00010 int main() 00011 { 00012 char a; 00013 pwm_1.period_us(pwm_period_us); 00014 pwm_2.period_us(pwm_period_us); 00015 pwm_3.period_us(pwm_period_us); 00016 00017 pwm_1.write(0.5); 00018 pwm_2.write(0.5); 00019 pwm_3.write(0.5); 00020 printf("PWM all RESET to %.1f %%\n", pwm_1.read() * 100); 00021 00022 while(1) { 00023 scanf("%c",&a); 00024 switch (a) { 00025 case '+': 00026 pwm += 0.05; 00027 pwm_1.write(pwm); 00028 pwm_2.write(pwm); 00029 pwm_3.write(pwm); 00030 printf("%c ; PWM all set to %.1f %%\n", a, pwm_1.read() * 100); 00031 break; 00032 case '-': 00033 pwm -= 0.05; 00034 pwm_1.write(pwm); 00035 pwm_2.write(pwm); 00036 pwm_3.write(pwm); 00037 printf("%c ; PWM all set to %.1f %%\n", a, pwm_1.read() * 100); 00038 break; 00039 /*case '3': 00040 pwm_3.write(pwm); 00041 printf("%c ; pwm_3 set to %.1f %%\n", a, pwm_3.read() * 100); 00042 break; 00043 00044 case '0': 00045 pwm_1.write(0.5); 00046 pwm_2.write(0.5); 00047 pwm_3.write(0.5); 00048 printf("%c ; pwm all reset to %.1f %%\n", a, pwm_1.read() * 100); 00049 break; 00050 */ 00051 default: 00052 pwm_1.write(0.5); 00053 pwm_2.write(0.5); 00054 pwm_3.write(0.5); 00055 printf("PWM all RESET to %.1f %%\n", pwm_1.read() * 100); 00056 break; 00057 } 00058 } 00059 }
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