Diff: main.cpp

Revision:

0:e4a1dd15fa04

Child:

1:3ac9dab9a2cc

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Feb 11 03:12:06 2016 +0000
@@ -0,0 +1,100 @@
+#include "mbed.h"
+#include "FastPWM.h"
+
+/*  Test Targets are:
+ * DISCO_F051R8
+ * DISCO_F100RB
+ * DISCO_F303VC
+ * DISCO_F407VG
+ * NUCLEO_F030R8
+ * NUCLEO_L152RE
+ * NUCLEO_F401RE
+ * NUCLEO_F411RE
+ */
+
+/* Period Interrupt monitor */
+DigitalOut led(LED1);       
+
+/* Using FastPWM library from:
+ * http://developer.mbed.org/users/Sissors/code/FastPWM/
+ * Thank you this library.
+ */
+#define TPWM FastPWM
+
+#if    defined(TARGET_NUCLEO_F411RE) || defined(TARGET_NUCLEO_F401RE) \
+    || defined(TARGET_DISCO_F303VC)  || defined(TARGET_DISCO_F407VG)
+    TPWM pwm_left( PA_8,1);
+#if defined(TARGET_DISCO_F407VG)
+    TPWM pwm_right(PA_10,1);
+#else
+    TPWM pwm_right(PA_9,1);
+#endif
+/* Interrupt */ 
+#define TIM_PWM      TIM1
+#if defined(TARGET_DISCO_F303VC)
+    #define TIM_PWM_IRQ  TIM1_UP_TIM16_IRQn
+#else
+    #define TIM_PWM_IRQ  TIM1_UP_TIM10_IRQn
+#endif
+#elif  defined(TARGET_STM32F030R8) || defined(TARGET_STM32F051R8) \
+    || defined(TARGET_STM32F100RB) || defined(TARGET_STM32L152RE) 
+/*  PWM3-1          D12           PA_6       Audio out Left
+    PWM3-2          D11           PA_7       Audio out Right */
+    TPWM pwm_left( PA_6,1);
+    TPWM pwm_right(PA_7,1);
+/* Interrupt */ 
+#define TIM_PWM      TIM3
+#define TIM_PWM_IRQ  TIM3_IRQn
+#endif
+
+/* PWM Timer constant value */
+#define F_CLK_ABP1      (SystemCoreClock)   // 
+#define TIMER_INPUT_CLK  F_CLK_ABP1
+#define MAX_PERIOD      ( TIMER_INPUT_CLK / (44100) )   // fs=44.1kHz 
+#define MAX_DUTY        ( (int32_t)MAX_PERIOD )        // Audio resolution :
+#define DELAY_MS        2
+
+static TIM_HandleTypeDef TimHandle;
+
+/* PWM Timer Interrupt routine */
+void IntrPwmPeriod( void ){
+    HAL_TIM_IRQHandler( &TimHandle );
+}
+
+/* HAL callback for PWM Timer Interrupt 
+ * Test monitor 
+ * */
+void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim){
+    (void)htim;
+    led = 1;
+    led = 0;
+}
+
+int main() {
+
+    TimHandle.Instance = TIM_PWM;
+
+    int i =1, delta = 1;
+
+    NVIC_SetVector( TIM_PWM_IRQ, (uint32_t)&IntrPwmPeriod );
+
+    pwm_left.period_ticks(  MAX_PERIOD );
+    pwm_right.period_ticks( MAX_PERIOD );
+
+    NVIC_EnableIRQ( TIM_PWM_IRQ );
+    __HAL_TIM_ENABLE_IT( &TimHandle, TIM_IT_UPDATE );
+
+    while(1) {
+        pwm_left.pulsewidth_ticks( i );
+        pwm_right.pulsewidth_ticks( i/2 );
+        if( ( i > MAX_DUTY-1 ) || ( i <= 0 ) ){
+            delta *= -1;
+        }
+        i += delta; 
+
+        wait_ms( DELAY_MS );
+    }
+}
+
+
+