topic Re: Reseting the K64 chip programatically in MQX Software Solutions

Reseting the K64 chip programatically

igor-imx — Mon, 24 Mar 2014 15:10:02 GMT

Hi Everyone

We were previously working on K60M512Z chip and the following code worked perfect for reseting the device programatically:

void deviceReset(void)

{

VCORTEX_SCB_STRUCT_PTR scb = (VCORTEX_SCB_STRUCT_PTR)&(((CORTEX_SCS_STRUCT_PTR)CORTEX_PRI_PERIPH_IN_BASE)->SCB);

uint32_t temp_AIRCR=0;

temp_AIRCR = (UINT)scb->AIRCR; //Read AIRCR register

temp_AIRCR &= 0x0000ffff; //DES mask of the top 16-bits

temp_AIRCR |= 0x05Fa0000; //DES When writing to AIRCR the update 16-bit must be "0x05FA" per ARMv7-M Architecture Reference Manual (must register on ARM.com to get)

temp_AIRCR |= SCB_AIRCR_SYSRESETREQ_MASK; //DES set the SYSRESETREQ bit to generate software reset

// Reboot...

_time_delay (50);

scb->AIRCR = temp_AIRCR;

for(;;)

return;

}

however im testing the same code with K64 chip (MK64FN1M0VLQ12) and its not causing the reset anymore.

Both setups are using MQX 4.1.0

Can anyone shed any light on whats wrong?

thank you in advance

Re: Reseting the K64 chip programatically

Carlos_Musich — Fri, 28 Mar 2014 01:17:18 GMT

Hi Igor,

Please try using next instruction:

SCB_AIRCR = 0x05FA0004;

Regards,

Carlos

Re: Reseting the K64 chip programatically

DavidS — Fri, 28 Mar 2014 14:09:59 GMT

Hi Igor,

I tried your code and it worked using MQX4.1 with the MQX/examples/event project for TWR-K64F120M.

I did have to change the variable

temp_AIRCR = (UINT)scb->AIRCR;   //Read AIRCR register

as I didn't have UINT defined so made it uint32_t.

My terminal output looks like:

Starting event example:

Tick 0

Tick 1

Tick 2

Tick 3

Tick 4

Tick 5

Tick 6

Tick 7

Tick 8

Tick 9

Tick 10