/*--------------------------------------------------------------------------------------*/
void CalPeriodTime(PWM_T *PWM, uint32_t u32Ch)
{
uint16_t u32Count[4];
uint32_t u32i;
uint16_t u16RisingTime, u16FallingTime, u16HighPeroid, u16LowPeroid, u16TotalPeroid;
/* Clear Capture Falling Indicator (Time A) */
PWM_ClearCaptureIntFlag(PWM, u32Ch, PWM_CAPTURE_INT_FALLING_LATCH);
/* Wait for Capture Falling Indicator */
while(PWM_GetCaptureIntFlag(PWM, u32Ch) < 2);
/* Clear Capture Falling Indicator (Time B)*/
PWM_ClearCaptureIntFlag(PWM, u32Ch, PWM_CAPTURE_INT_FALLING_LATCH);
u32i = 0;
while(u32i < 4)
{
/* Wait for Capture Falling Indicator */
while(PWM_GetCaptureIntFlag(PWM, u32Ch) < 2);
/* Clear Capture Falling and Rising Indicator */
PWM_ClearCaptureIntFlag(PWM, u32Ch, PWM_CAPTURE_INT_FALLING_LATCH | PWM_CAPTURE_INT_RISING_LATCH);
/* Get Capture Falling Latch Counter Data */
u32Count[u32i++] = PWM_GET_CAPTURE_FALLING_DATA(PWM, u32Ch);
/* Wait for Capture Rising Indicator */
while(PWM_GetCaptureIntFlag(PWM, u32Ch) < 2);
/* Clear Capture Rising Indicator */
PWM_ClearCaptureIntFlag(PWM, u32Ch, PWM_CAPTURE_INT_RISING_LATCH);
/* Get Capture Rising Latch Counter Data */
u32Count[u32i++] = PWM_GET_CAPTURE_RISING_DATA(PWM, u32Ch);
}
u16RisingTime = u32Count[1];
u16FallingTime = u32Count[0];
u16HighPeroid = u32Count[1] - u32Count[2];
u16LowPeroid = 0x10000 - u32Count[1];
u16TotalPeroid = 0x10000 - u32Count[2];
printf("\nPWM generate: \nHigh Period=7199 ~ 7201, Low Period=16799 ~ 16801, Total Period=23999 ~ 24001\n");
printf("\nCapture Result: Rising Time = %d, Falling Time = %d \nHigh Period = %d, Low Period = %d, Total Period = %d.\n\n",
u16RisingTime, u16FallingTime, u16HighPeroid, u16LowPeroid, u16TotalPeroid);
if((u16HighPeroid < 7199) || (u16HighPeroid > 7201) || (u16LowPeroid < 16799) || (u16LowPeroid > 16801) || (u16TotalPeroid < 23999) || (u16TotalPeroid > 24001))
printf("Capture Test Fail!!\n");
else
printf("Capture Test Pass!!\n");
}
// ============================================================
// caculate time during pwm0_ch4 falling and rising edge
// ============================================================
uint16_t IrSonar_CalPeriodTime(PWM_T *PWM, uint32_t u32Ch)
{
uint16_t u16RisingTime, u16FallingTime, u16Period;
u16RisingTime = PWM_GET_CAPTURE_RISING_DATA(PWM, u32Ch);
u16FallingTime = PWM_GET_CAPTURE_FALLING_DATA(PWM, u32Ch);
u16Period = u16RisingTime - u16FallingTime;
//printf("\nCapture Result: Rising Time = %d, Falling Time = %d \nHigh Period = %d",
//u16RisingTime, u16FallingTime, u16Period);
return u16Period;
}
