Notes

This module defines locks to constitute critical sections by suspending the DMA controller.

Example

uint32_t x;

x = ao_sys_lock_dma();
{
    // ...

    // Critical section.
    // DMA controller is suspended.

    // ...
}
ao_sys_unlock_dma(x);

Include

Functions

ao_sys_lock_dma

uint32_t ao_sys_lock_dma();

Enters a critical section by suspending the DMA controller. This function returns the previous state of the DMACON.SUSPEND bit.

ao_sys_unlock_dma

void ao_sys_unlock_dma(uint32_t x);

Exits a critical section. This function restores the previous value of the DMACON.SUSPEND bit.