Interrupt before starting FreeRTOS

leportu33 wrote on Thursday, January 28, 2010:

Hello,
I would like to know how can I Initialize interrupt on an at91SAM7S128 before starting freeRTOS. I’m using IARWorkbench V5.40.
Thank you for your help.

edwards3 wrote on Thursday, January 28, 2010:

Just enable interrupts using portENABLE_INTERRUPTS(); but don’t enable interrupts that use the FreeRTOS API or try and block/unblock a task until after the scheduler has been started. Also if you call an API function it is likely that interrupts will get disabled again.

leportu33 wrote on Thursday, January 28, 2010:

OK. But how can I block or unblock a task.
I explain to you what I have to done. In a school project I have to put free RTOS in the AT91SAM7S128 and I have to put the arm in idle mode (sleep mode) by pressing a button during 3sec and waking up the arm by pressing this buton an other time (for 3sec too). So I think I have to use interrupt in the pin where the button is connect.