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Problem in Interrupt Enable process
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Wang Zhijian Posted
5-Oct-2000 06:25 GMT Toolset
C51 |
 Problem in Interrupt Enable processWang Zhijian
since working with RTX, to enable interrupt should be operated by os_enable_isr(), and directly setting bit in IE is no useful......but, the problem is why it failed to call os_enable_isr(4) to enable serial port0 interrupt.......anybody can give me some advice on it. thanks in advance.
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Wang Zhijian Posted
5-Oct-2000 08:43 GMT Toolset
C51 |
RE: Problem in Interrupt Enable process Wang Zhijian
According to the result of trace, it failed when to check a base-address add the specified interrupt number, the address(in Code address) return 0, then it return fail information.......why did it return fail? what should I put in the address? any other way to enable interrupt except the RTX function os_enabled_interrupt()?
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Keil Support Posted
5-Oct-2000 10:10 GMT Toolset
C51 |
RE: Problem in Interrupt Enable process Keil Support
Did you create an interrupt function?Keil Support |
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Wang Zhijian Posted
5-Oct-2000 12:29 GMT Toolset
C51 |
RE: Problem in Interrupt Enable process Wang Zhijian
Yes, of course.Now I can get a very simple example with interrupt and RTX-51 tasks to work well now. But my original program still can work, but the two programs are in the same proccess on interrupt. Thanks very much |
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Keil Support Posted
10-Oct-2000 07:53 GMT Toolset
C51 |
RE: Problem in Interrupt Enable process Keil Support
I got this working in RTX51. It was pretty straight-forward.1. Create the interrupt service routine as you would in a standard Keil C51 program. This is the int0 function in the following example. 2. Create some code that enables the interrupt source. The statements EX0 = 1; and IT0 = 1; in the startup task do this. 3. Call the os_enable_isr function and pass the interrupt number. This is also done in the startup task. For example:
#include <rtx51.h>
#include <reg51.h>
#include <stdio.h>
#define STARTUP_TASK 0
//-----------------------------------------------
//-----------------------------------------------
void int0 (void) interrupt 0
{
static unsigned int i;
i++;
}
//-----------------------------------------------
//-----------------------------------------------
void task0 (void) _task_ STARTUP_TASK
{
os_set_slice (1000); /* Set for OSC Frequency / 10,000 */
EX0 = 1; /* Enable External Int 0 */
IT0 = 1; /* Edge-triggered */
os_enable_isr (0); /* Enable interrupt #0 */
while (1)
{
os_wait (K_TMO, 100, NULL);
}
}
//-----------------------------------------------
//-----------------------------------------------
void main (void)
{
os_start_system (STARTUP_TASK);
}
You may download this complete uVision2 application from the following URL: http://www.keil.com/download/docs/rtx51_ints.zip.asp Keil Support |
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Wang Zhijian Posted
10-Oct-2000 13:28 GMT Toolset
C51 |
RE: Problem in Interrupt Enable process Wang Zhijian
Thanks very much.I've got it work now. |
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Wang Zhijian Posted
6-Oct-2000 10:24 GMT Toolset
C51 |
RE: Problem in Interrupt Enable process Wang Zhijian
Can anybody give me some information about it? Thanks in advance. |
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