MCB1800 software reset

lpcware — Wed, 15 Jun 2016 18:15:23 GMT

Content originally posted in LPCWare by moualek_adlene on Mon Dec 22 02:08:51 MST 2014
Hi,
i can't do a software reset on a Keil MCB1800 Board with LPC1857 ARM processor. I use Keil uVision 5 and ULINK-ME as debugger. I have tried many solutions found on Keil and NXP forums without success.
Essentially, solution 1 consist on this :

*(volatile unsigned int *)0x40043100 = 0x10400000; //memmap with boot ROM address
*(volatile unsigned int *)0x40053100 =(1<<0); // Core reset

and solution 2 is this one :

NVIC_SystemReset();

Also i have disabled all IRQ before to try to reset the board.
For solution 1 nothing happen at all after reset instructions, while for solution 2 the program seems to successfuly initiate a reset but stop in the sub-procedure SetClock situated in system_LPC18xx.c and more exactly at this instruction :

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

.
If there is no solution to make this board correctly reboot, i want to know if it is possible to produce a reset by connecting a GPIO pin configured as output to the RESET pin of the processor and then setting this pin low until reset occur. I thing this is the best solution (because this will produce real hardware reset effects) but i haven't tried it.
Thanks for any response.

Re: MCB1800 software reset

lpcware — Wed, 15 Jun 2016 18:15:24 GMT

Content originally posted in LPCWare by mc on Thu Jan 08 19:38:05 MST 2015
Hi,
Below should work.

Quote:
*(volatile unsigned int *)0x40043100 = 0x10400000; //memmap with boot ROM address
*(volatile unsigned int *)0x40053100 =(1<<0); // Core reset

Device may be going into ISP mode. Please make sure that ISP pin is high. If you are using ISP pin for external memory controller it may be low during reset.

topic Re: MCB1800 software reset in LPC Microcontrollers

MCB1800 software reset

Re: MCB1800 software reset