topic Re: How to reset LPC43xx from application in LPC Microcontrollers

How to reset LPC43xx from application

hperic — Sun, 29 Dec 2019 01:41:01 GMT

How to reset LPC43xx from application

In my project ,I need to reset cpu from application.

First I start a Project in MDK5 IDE.

void Reset_Handler(){
SystemInit();
__main();
}
void main(){
NVIC_SystemReset();
}

In this Program, CPU can be reset ,but cpu will crash in systemInit fuction.

LPC_CGU->BASE_M4_CLK = (0x01 << 11) | /* Autoblock En */
(CLK_SRC_IRC << 24) ; /* Set clock source */

LPC_CGU->XTAL_OSC_CTRL = (0 << 0) | /* Enable oscillator-pad */
(0 << 1) | /* Operation with crystal connected */
(0 << 2) ; /* Low-frequency mode */

Then ,I modify Program like below,

#define RESET_CTRL0 * (int*) 0x40053100

void main(){
RESET_CTRL0 =1;

RESET_CTRL0 =0;
}

this time, the prog failed to restart again ,and the cpu can not be proram anymore.

I need your help..

Re: How to reset LPC43xx from application

jeremyzhou — Thu, 02 Jan 2020 02:57:12 GMT

Thank you for your interest in NXP Semiconductor products and
for the opportunity to serve you.
I've inserted the NVIC_SystemReset(); in the demo of the LPCOpen library, After running the demo project, I find that the MCU is available to be reset periodically
Below demonstrates I inserted the NVIC_SystemReset(); in the watchdog demo project.

Have a great day,
TIC

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