chaalar wrote on Wednesday, January 31, 2007:
I am using SAM7X Web demo with GCC. In addition to the default Demo settings, I added an SPI interrupt and vApplicationTickHook function. My problem is that vApplicationTickHook function is called (sometimes) accidentally(i.e. spurious interrupt). It should be called within each 1 msec. It is called generally but sometimes period changes to ~ 40 microsec and then 1 msec again. Following is the what I see on my scope.(I’m toggling a pin in vApplicationTickHook)
--------- ---------- ---------
| | | | |
| | | | |
| | | | |
---------- ---- ---------
1msec 1mes 1mes 40u 1msec 1mesc …
I relized that if I send less data from Ethernet, occurence of these abnormal pulses decreases,also. I wonder if anybody has faced this kind of behaviour.
Best regards,
Caglar Akyuz