try19_pwm_tim20_comple

Dependencies:   mbed FastPWM

Revision:
1:27f1640d930d
Parent:
0:8a1dc1fdba10
--- a/main.cpp	Mon Aug 12 09:15:22 2019 +0000
+++ b/main.cpp	Wed Aug 21 05:18:06 2019 +0000
@@ -1,27 +1,30 @@
 #include "mbed.h"
 #include "FastPWM.h"
 
-#define PIN_U PA_10
-#define PIN_V PA_9
-#define PIN_W PA_8
-#define PWM_ARR 0x8CA  /// timer autoreload value
+#define PIN_A PA_8 // channel 1
+#define PIN_B PA_7 // complementary
+#define PWM_ARR 0x8CA  /// timer autoreload value 40k loop, 40k pwm 
 
-float dtc_u=0.1;
-float dtc_v=0.2;
-float dtc_w=0.6;
+float dtc_a=0.1;
+float dtc_b=0.2;
 void Init_PWM();
+DigitalOut check(PC_9);
+DigitalIn a1(PB_7);
+DigitalIn a2(PB_6);
+
 
 extern "C" void TIM1_UP_TIM10_IRQHandler(void) {
   if (TIM1->SR & TIM_SR_UIF ) {
-    TIM1->CCR3 = (PWM_ARR)*(1.0f-dtc_u);                        // Write duty cycles
-    TIM1->CCR2 = (PWM_ARR)*(1.0f-dtc_v);
-    TIM1->CCR1 = (PWM_ARR)*(1.0f-dtc_w);                        // CCR1 = channel 1                                      
+    check=1;
+    TIM1->CCR1 = (PWM_ARR)*(1.0f-dtc_a);                        // Write duty cycles                                   
+    check=0;
     }
 TIM1->SR = 0x0;  // reset the status register
 }
 
 
 int main(){
+    check=1;
     Init_PWM();
     TIM1->CR1 ^= TIM_CR1_UDIS;
     while(1);
@@ -31,18 +34,10 @@
 
 void Init_PWM(){
 
-    RCC->AHB1ENR |= RCC_AHB1ENR_GPIOCEN;                        // enable the clock to GPIOC
-    RCC->APB1ENR |= 0x00000001;                                 // enable TIM2 clock
     RCC->APB2ENR |= RCC_APB2ENR_TIM1EN;                         // enable TIM1 clock
 
-    GPIOC->MODER |= (1 << 10);                                  // set pin 5 to be general purpose output for LED
-//    gpio->enable = new DigitalOut(ENABLE_PIN);
-//    gpio->pwm_u = new FastPWM(PIN_U);
-//    gpio->pwm_v = new FastPWM(PIN_V);
-//    gpio->pwm_w = new FastPWM(PIN_W);
-    FastPWM pwm_u(PIN_U);                                       // 단순히 핀 설정용 
-    FastPWM pwm_v(PIN_V);
-    FastPWM pwm_w(PIN_W);
+    FastPWM pwm_a(PIN_A);                                       // 단순히 핀 설정용 
+    FastPWM pwm_b(PIN_B);
     
      //ISR Setup     
     
@@ -54,12 +49,16 @@
     TIM1->CR1 |= TIM_CR1_ARPE;                                  // autoreload on, 
     TIM1->RCR |= 0x001;                                         // update event once per up/down count of tim1 
     TIM1->EGR |= TIM_EGR_UG;
+
+
  
     //PWM Setup
 
     TIM1->PSC = 0x0;                                            // no prescaler, timer counts up in sync with the peripheral clock
     TIM1->ARR = PWM_ARR;                                          // set auto reload, 40 khz
-    TIM1->CCER |= ~(TIM_CCER_CC1NP);                            // Interupt when low side is on.
+//    TIM1->CCER |= ~(TIM_CCER_CC1NP);                            // Interupt when low side is on.
     TIM1->CR1 |= TIM_CR1_CEN;                                   // enable TIM1
     
+    // for complementary 
+    TIM1->CCER|=0b1111;
     }
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