Problem in Interrupt Enable process

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Read-Only Author Wang Zhijian Posted 5-Oct-2000 06:25 GMT Toolset C51	Problem in Interrupt Enable process Wang 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.

Read-Only Author 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()?

Read-Only Author 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

Read-Only Author 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

Read-Only Author 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*

Read-Only Author 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.

Read-Only Author 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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