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Lemosek
Joined: 15 Oct 2011
Posts: 36
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| RTOS and CAN 18f2580 |
 Posted: Tue Mar 20, 2012 11:09 am |
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Hello, I have strange problem. I write a simple code:
| Code: |
#include <18F2580.h>
#fuses HS, NOPROTECT, PUT, BROWNOUT, NOWDT, NOLVP
#use delay(clock=20M)
#use rtos(timer=1,minor_cycle=20ms)
#include <can-18F4580.c> // Use correct driver
#include "button.c"
//definicje ID CAN
#define BOARD_ID_LEDMATRIX 30
#define BOARD_ID_MAIN_LEDMATRIX 31
//*************** Global variables ****************
int8 sem;
struct rx_stat rxstat;
int32 rx_id;
int32 tx_id;
int8 rx_len;
volatile int8 buffer_rcv[8];
int8 buffer_tx[8];
//*************************** TASK *****************************
#task(rate=200ms,max=20ms)
void Led_button_task ( );
#task(rate=1000ms,max=20ms)
void Button_task ( ); // odczyt stanu przycisków co 10ms
//======== button task =====//
void Button_task(){
can_putd(BOARD_ID_MAIN_LEDMATRIX, buffer_tx, 1, 1, 1, 0);
}
void Led_button_task()
{
}
//======================================
void main()
{
//CAN
can_init();
sem=1;
rtos_run();
} |
Compiler warning:
Warning 216 Interrupts disabled during call to prevent re- entrancy: (can_set_id)
Why I have this warning??
CCS PCH C Compiler, Version 4.128.
In past I write some code with CAN bus and RTOS for dsPIC30f6010A and I also use Can_putd function in tasks and don't have this warning.
Best regards
R.L. |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Tue Mar 20, 2012 3:07 pm |
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Both can_putd() and can_init() call the can_set_id() function.
I don't have the CCS RTOS, but apparently tasks are called from within
an interrupt routine.
| Code: |
void Button_task(){
can_putd(BOARD_ID_MAIN_LEDMATRIX, buffer_tx, 1, 1, 1, 0);
}
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That would explain why you get the "interrupts disabled" warning.
| Quote: |
In past I write some code with CAN bus and RTOS for dsPIC30f6010A and
I also use Can_putd function in tasks and don't have this warning.
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I don't have the PCD compiler, but it's possible that it allows nested
interrupts and re-entrant routines. I have no experience with dsPICs
or PCD. But that could explain the difference. Or, it's also possible
that you had Warnings disabled when you used the PCD compiler. |
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