topic Lpc4357 Timer Configuration in LPC Microcontrollers

Lpc4357 Timer Configuration

hdhedhu — Mon, 06 Apr 2020 08:52:26 GMT

I am starting on LPC4357 which has dual-core M0 and M4, I using LPC43xx_Old_Libraries for configuration purpose.

The issue I am facing is that when I am not able to configure M0_timer0 faster then 10us I want to configure it to 2us. Until 10us configuration is working fine. When I go faster than 10us M0 core is showing hard fault. also, I am not able to configure Timer3 on M0 core but all these things are working fine on M0 core. someone can please explain this issue and tell whatever I am trying is doable or not. If yes then how. I have attached M0app and M4 core main files below.

lpc4357‌ #lpc4357timers cortex m4‌ cortex m0‌ dual-core‌ mcuxpressoide‌

Re: Lpc4357 Timer Configuration

xiangjun_rong — Mon, 13 Apr 2020 09:37:49 GMT

Hi, Himanshu,

Regarding your question, for the code:

void M0_TIMER0_IRQHandler(void)
{
if(msec)msec--;
counter++;

LPC_TIMER0->IR = TIM_IR_CLR(0);
NVIC_ClearPendingIRQ(M0_TIMER0_IRQn);
}

How about using the code:

void M0_TIMER0_IRQHandler(void)
{
if(msec)msec--;
counter++;

//LPC_TIMER0->IR = TIM_IR_CLR(0);

LPC_TIMER0->IR |= 0x01; //clear flag

//delete the following line NVIC_ClearPendingIRQ(M0_TIMER0_IRQn);
//NVIC_ClearPendingIRQ(M0_TIMER0_IRQn);
}

Xiangjun Rong

Re: Lpc4357 Timer Configuration

hdhedhu — Fri, 17 Apr 2020 06:24:30 GMT

Thanks, xiangjun.rong

Now My Timer 0 is working at 2us but I am still not able to configure Timer 3.