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On Thu, Jul 3, 2008 at 5:39 PM, Andrew Lunn <andrew@lunn.ch> 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) :
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.
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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