How do I disable all interrupts on a MPC5604 (whats the equivalent to DisableInterrupts used on the S12 compiler)

[dermotmurphy]

I have an interrupt which is updating data, which can also be read using other functions.

I need to be able to read data knowing that it is not being updated mid way through the read.

On the S12 I would do this:

disable all interrupts using the DisableInterrupts function which would update the I bit in the CCR register.

perform the action

enable all interrupts using the EnableInterrupts function

What is the equivalent for the MPC5604?

[dermotmurphy]

Many thanks, that works great.

[stanish · Accepted solution]

You can e.g. set/clear EE bit in MSR register. See below the example of implementation using the custom macros.

#define DISABLE_INT __asm(wrteei  0)

#define ENABLE_INT  __asm(wrteei  1)

void main(void)

{

  ENABLE_INT;

DISABLE_INT;

}