how to use timer module as PWM input capture?

NoahXu — Thu, 18 Jan 2024 13:28:12 GMT

for example i want to use TIM0Ch1 as input caputure to get the pwm signal .

step1, i config the register of timer0

void initTIM(void)

{

TIM0TIOS_IOS1 = 0; // Input Capture/Output Compare Channel3 Configuration//Input

TIM0TIE_C1I = 1; // Input Capture/Output Compare channel3 //Interrupt Enable

TIM0TCTL4_EDG1A = 1; // falling edge channel3

TIM0TCTL4_EDG1B = 1; // rising edge channel3

TIM0OCPD_OCPD3 = 1; // Enabled | Output compare pin disconnect register

TIM0OCPD_OCPD2 = 1; // Enabled | Output compare pin disconnect register

TIM0OCPD_OCPD1 = 1; // Enabled | Output compare pin disconnect register

TIM0OCPD_OCPD0 = 1; // Enabled | Output compare pin disconnect register

TIM0PTPSR = 49; // Timer Pre-scaler =49+1

TIM0TSCR1_PRNT = 1; // Precision timer divider enable

TIM0TSCR2_TOI = 1; // Overflow interrupt enabled

}

void EnableTIM()

{

TIM0TC1 = 0; // Timer Input Capture/Output channel3 Compare Registers High and Low 0–1(TCxH and TCxL)

TIM0TSCR1_TEN = 1; // Enabled | Timer Enable

}

step2 setup isr for tim0ch1

interrupt VectorNumber_Vtim0ch1 void TIM0chan1_ISR(void)

{

// Read PWM input control pin and update status

PWMControlUpdate(TIM0TC1, &pwmControlData);

// Read the PWM Control output

pwmControlData.outputValue = PWMControlGetOutputValue(&pwmControlData);

// Toggle edge detection

if(pwmControlData.flags.risingEdge)

{

TIM0TCTL4_EDG1A = 1;

TIM0TCTL4_EDG1B = 0;

}

if(pwmControlData.flags.fallingEdge)

{

TIM0TCTL4_EDG1A = 0;

TIM0TCTL4_EDG1B = 1;

}

// Clear interrupt flag

TIM0TFLG1 = TIM0TFLG1_C1F_MASK; //TIM0TFLG1_C0F_MASK | TIM0TFLG1_C1F_MASK | TIM0TFLG1_C2F_MASK | TIM0TFLG1_C3F_MASK;

}

step3 calculate pwm input value

...

about the register setup is there anything wrong?

Re: how to use timer module as PWM input capture?

NoahXu — Mon, 22 Jan 2024 08:35:36 GMT

solved

S12 / MagniV MicrocontrollersのトピックRe: how to use timer module as PWM input capture?

how to use timer module as PWM input capture?

Re: how to use timer module as PWM input capture?