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Re: E7T timer0 interrupt issue ?
- From: Gary Thomas <gthomas at redhat dot com>
- To: peter_ku <peter_ku at issc dot com dot tw>
- Cc: eCos Discussion <ecos-discuss at sources dot redhat dot com>
- Date: 21 May 2002 06:40:13 -0600
- Subject: Re: [ECOS] E7T timer0 interrupt issue ?
- References: <000001c20077$f7e23320$790114ac@issc.com.tw>
On Mon, 2002-05-20 at 21:31, peter_ku wrote:
> Hello,
>
> Target = E7T.
> I write a simple program to test timer0 interrupt, I want to toggle the led every 1sec. But I can't enter my ISR.
> I can see the INTPND = 0x400, and also see my timer0 running!!
> Anyone can check the following code?
>
You need to start the kernel/scheduler, which in turn enables
interrupts. If you use cyg_start() or cyg_user_start(), this has to be
done manually (see below). Alternatively, use main() instead of
cyg_user_start().
> thanks a lot
> Peter
>
>
> #define TOTAL_THREADS 1
>
> cyg_thread threads[TOTAL_THREADS];
>
> cyg_handle_t handle_thread_show_led;
> cyg_handle_t handle_timer0_isr;
>
> cyg_interrupt isr;
>
> char stack[TOTAL_THREADS][4096];
>
> cyg_thread_entry_t show_led_proc;
> cyg_ISR_t Timer0_ISR;
> cyg_DSR_t Timer0_DSR;
>
> void cyg_user_start(void)
> {
> cyg_thread_create(4, show_led_proc , (cyg_addrword_t) 0 , "THREAD SHOW LED", (void *) stack[0], 4096,
> &handle_thread_show_led, &threads[0]);
>
>
> cyg_interrupt_create(CYGNUM_HAL_INTERRUPT_TIMER0,99,0,Timer0_ISR, Timer0_DSR, &handle_timer0_isr, &isr);
>
> cyg_interrupt_attach(handle_timer0_isr);
>
> HAL_WRITE_UINT32(E7T_TDATA0,50000000);
> HAL_WRITE_UINT32(E7T_TMOD,E7T_TMOD_TE0 | E7T_TMOD_TMD0);
>
> cyg_interrupt_unmask(CYGNUM_HAL_INTERRUPT_TIMER0);
> cyg_interrupt_enable();
>
>
> cyg_thread_resume(handle_thread_show_led);
>
cyg_scheduler_start();
>
> }
>
>
>
>
> void show_led_proc(cyg_addrword_t data)
> {
>
> int i,j;
> int temp_data;
>
>
> HAL_READ_UINT32(E7T_IOPDATA,temp_data);
> temp_data |= 0xf0;
> HAL_WRITE_UINT32(E7T_IOPDATA,temp_data);
>
> for( ; ; )
> {
> for( i =0 ; i < 10 ; i++)
> {
>
> HAL_READ_UINT32(E7T_IOPDATA,temp_data);
> temp_data &= ~SEG_MASK;
> temp_data |= numeric_display[i];
> HAL_WRITE_UINT32(E7T_IOPDATA,temp_data);
> for(j = 0; j < 10000000; j++) { }
> }
>
> }
>
> }
>
>
> cyg_uint32 Timer0_ISR(cyg_vector_t vector, cyg_addrword_t data)
> {
>
> cyg_uint32 temp_data;
> HAL_READ_UINT32(E7T_IOPDATA,temp_data);
> temp_data ^= 0xf0;
> HAL_WRITE_UINT32(E7T_IOPDATA,temp_data);
>
> cyg_interrupt_acknowledge(vector);
>
> return CYG_ISR_HANDLED;
> }
>
> void Timer0_DSR(cyg_vector_t vector,cyg_ucount32 count, cyg_addrword_t data)
> {
>
> }
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