MPC5xxx中的主题 Re: Disable Interrupts and Enable Interrupts

Disable Interrupts and Enable Interrupts

Deepak1 — Tue, 14 Jul 2020 18:03:08 GMT

I am using MPC5748G micrcontroller.

During executing some operations I want to disable interrupts and then want enable interrupts. Below is the code I that i am using for the same.

Please let me know is this correct implementation ? you can also suggest me better method.

/* Disable Interrupt */
#define DISABLE_INTERRUPT \
__asm volatile("mfmsr %0" : "=r" (msr) :);\
if (msr & (uint32)0x00008000UL)\
__asm(" wrteei 0");

/* Enable Interrupt */
#define ENABLE_INTERRUPT \
if (msr & (uint32)0x00008000UL)\
__asm(" wrteei 1");

petervlna — Wed, 15 Jul 2020 05:43:23 GMT

Hi,

I do not have any knowledge on your compiler, but yes the wrteei instruction enable/disable external interrupt processing to core.

regards,

Peter

PS: Execution of this instruction is privileged and restricted to supervisor mode only.

Deepak1 — Sat, 18 Jul 2020 08:56:47 GMT

Hi Peter,

Sorry i forgot to mention about compiler.

I am using GCC compiler and IDE is S32DS Power v2.1.

I want to disable and enable internal as well external interrupts.

petervlna — Thu, 23 Jul 2020 07:23:19 GMT

Hi,

I am not using GCC, but this should work.

I will check it with the gcc expert and let you know in case I am wrong.

regards,

Peter