Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

alt_alarm_start()

int alt_alarm_start (alt_alarm* alarm, alt_u32 nticks, alt_u32 (*callback) (void* context), void* context); according to the handbook, program would transfer alt_u32 (*callback)(void* contex...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Hi everyone.

I'm pretty new of this forum and i hope you could help me. I'm fighting wit the alt_alarm_function ().

To explain better my problem I have to do a little introduction on my project. I'm working with an CycloneIII and I have build a Real-time application using the MicroC-OSII. I have four different tasks which run on my machine.At the power up the four task and the different peripheral are initialized, then start a task which take care to grab data from an external device for the FPGA. After a certain number of data another task is called and start to process the collected raw data. This two task run continuously and for fixed time step I' d like to check the connection with the peripheral. I'm trying to the alt_start function but after the first call the program does't 'm come back to the task who was running and all the system is completely stuck until the next alarm event happens.

Does anyone know how to handle the alt_alarm_start() with a multitasking system?

Have I clean some IRQ register?

Thanks in advance for your help