TMS570LC4357: Capture the frequency from N2het

prasanna naik

Part Number: TMS570LC4357
Other Parts Discussed in Thread: HALCOGEN

...I am trying to capture the frequency using N2HET1 pin .. that value displayed on Hyperterminal .

Here SCI is working fine but wen i use capture function return value duty is 0x00000000.

i also enable the het pin in pinmux and select cap0 ..

uint32_t capGetSignal1(hetRAMBASE_t * hetRAM, uint32 cap)
{
uint32 pwmDuty = (hetRAM->Instruction[(cap << 1U) + 25U].Data) >> 7U;
uint32 pwmPeriod = (hetRAM->Instruction[(cap << 1U) + 26U].Data) >> 7U;
return pwmDuty;
}

use this function to capture the pwmDuty

over 8 years ago

0 QJ Wang over 8 years ago

TI__Guru**** 197036 points

Hello Xinyu,

Which pin is used to capture the waveform? Can you show me the HALCoGen configuration for NHET and your main function?

0 prasanna naik over 8 years ago in reply to QJ Wang

Prodigy 150 points

Here i attached the pinmux and het1 configuration in halcogen

0 prasanna naik over 8 years ago in reply to QJ Wang

Prodigy 150 points

My main function

uint32_t capGetSignal1(hetRAMBASE_t * hetRAM, uint32 cap)
{
uint32 pwmDuty = (hetRAM->Instruction[(cap << 1U) + 25U].Data) >> 7U;
uint32 pwmPeriod = (hetRAM->Instruction[(cap << 1U) + 26U].Data) >> 7U;
float64 period;
return pwmDuty;
}

int main(void)
{
/* USER CODE BEGIN (3) */
uint32_t CapPwmPeriod;
gioInit();
sciInit();
sciSend(sciREG1, 17, "Set up Complete\n\r");
hetInit();

while(1)
{
CapPwmPeriod = capGetSignal1(hetRAM1,cap0);
sciDisplayData(sciREG1,(uint8_t*)&CapPwmPeriod,4);
sciSend(sciREG1,2, "\n\r");
}
/* USER CODE END */

return 0;
}

0 QJ Wang over 8 years ago in reply to prasanna naik

TI__Guru**** 197036 points

Hello Xinyu,

The input from HET[1] pin is routed to HET HR0, so HET HR1 doesn't have any input. Don't use HR share.

Arm-based microcontrollers

Arm-based microcontrollers forum

TMS570LC4357: Capture the frequency from N2het