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Re: -- please someone respond -- S3c2410x (ARM920T) HAL port
- From: "Michael Anburaj" <embeddedeng at hotmail dot com>
- To: embeddedeng at hotmail dot com, ecos-discuss at sources dot redhat dot com
- Date: Fri, 20 Jun 2003 04:28:07 +0000
- Subject: Re: [ECOS] -- please someone respond -- S3c2410x (ARM920T) HAL port
- Bcc:
No one responded to my previous emails. One way it's good; I getting to know
ecos/Reboot underlying code much more elaborately.
The problem I was seeing may be attributed to this (not very sure):
The timer (RTC or tick) interrupt is not happening at all.
Questions:
1. Is this (ISR) needed for proper operation of Redboot (for example for
dispatching the gdb command like, ?continue?)?
2. The reason why the interrupt were not happening was, the I bit in CPSR
never got cleared (IRQs enabled). The document ?hal-exception-handling.html?
in its very 1st point says about interrupts being disabled before starting
anything. But never mentioned when its supposed to be turned ON. Someone
familiar with the ARM ports; can you tell me where exactly the I bit in CPSR
is cleared; this will defiantly make my job easier.
Thanks & Cheers,
-Mike.
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