Alexandre wrote:
On Thu, Jul 3, 2008 at 5:39 PM, Andrew Lunn <[EMAIL PROTECTED]> wrote:
Duh... Didn't read the message correctly, so missed the obvious problem....
I thought vector, then the problem is priority.....
This is easy to explain. The actual serial driver is in
/packages/devs/serial/generic/16x5x/current/src.
It registers the interrupt handler with:
cyg_drv_interrupt_create(ser_chan->int_num,
CYG_IO_SERIAL_GENERIC_16X5X_INT_PRIORITY,
(cyg_addrword_t)chan,
pc_serial_ISR,
pc_serial_DSR,
&ser_chan->serial_interrupt_handle,
&ser_chan->serial_interrupt);
The priority is hard coded for all serial devices as 4.
You can sort of override this. The same file says:
#ifndef CYG_IO_SERIAL_GENERIC_16X5X_INT_PRIORITY
# define CYG_IO_SERIAL_GENERIC_16X5X_INT_PRIORITY 4
#endif
but you don't appear to be able to override it per device, just for
all devices. So i think you are not going to be able to benefit from
vectored interrupts and will have to use a priority of 16. Or you need
to have the serial driver to allow you to specify a priority level per
device.
Humm, actually, you could do something a little horrible like:
#define CYG_IO_SERIAL_GENERIC_16X5X_INT_PRIORITY \
(ser_chan->int_num == CYGNUM_HAL_INTERRUPT_UART0 ? 4 : 5)
in arm_lpc2xxx_ser.inl
Andrew
That does the trick.
The program stops there (after cyg_user_start(), some scheduler, clock
and thread work) :
If I remember, in a past I did catch same asserts on LPC2XXX UARTS
ASSERT FAIL: (1) lpc2xxx_misc.c[472]hal_interrupt_set_level() Priority
already used by another vector
So, I just dirty tweaked the lpc2xxx_misc.c to shift priority to next
free slot. I found that my patch. Try to apply the patch and rebuild
eCos build tree. Today, I have no LPC2XXX hardware to test it.
Sergei
diff -ur A/hal/arm/lpc2xxx/var/current/src/lpc2xxx_misc.c B/hal/arm/lpc2xxx/var/current/src/lpc2xxx_misc.c
--- A/hal/arm/lpc2xxx/var/current/src/lpc2xxx_misc.c
+++ B/hal/arm/lpc2xxx/var/current/src/lpc2xxx_misc.c
@@ -462,12 +462,18 @@
//
if (level < 16)
{
+ int i;
cyg_uint32 addr_offset = level << 2;
cyg_uint32 reg_val;
- HAL_READ_UINT32(CYGARC_HAL_LPC2XXX_REG_VIC_BASE +
- CYGARC_HAL_LPC2XXX_REG_VICVECTCNTL0 +
- addr_offset, reg_val);
+ for (i = level; i < 16; i++) {
+ addr_offset = i << 2;
+ HAL_READ_UINT32(CYGARC_HAL_LPC2XXX_REG_VIC_BASE +
+ CYGARC_HAL_LPC2XXX_REG_VICVECTCNTL0 +
+ addr_offset, reg_val);
+ if ((reg_val == 0) || (reg_val == (vector | 0x20)))
+ break;
+ }
CYG_ASSERT((reg_val == 0) || (reg_val == (vector | 0x20)),
"Priority already used by another vector");
HAL_WRITE_UINT32(CYGARC_HAL_LPC2XXX_REG_VIC_BASE +
--
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