[SOLVED] Microchip TCP/IP Stack - Helps Needed in Cooperate Multitasking

[LongYC]

Hi, I can't seem to make the Microchip stack works with a simple LED blinking program, I wish someone can give me an idea of what have I done wrong. Thank you.

Hardware:
PIC18F4620 with ENC28J60, the SPI is working fine, hardware components have no problem.

Compiler used:
C18, MPLAB deafult storage class is set to overlay.

Notes:
- Stack version: v5.31.
- The state constants are defined as 0x01, 0x02, etc. Tried '1', '2', etc, doesn't seem to be the problem.
- Everything works fine if I don't do it the cooperative multitasking way (no states) but it was too slow as tasks hogging the processor.

Code:

static unsigned char state; 
static TICK time; 

void main (void) 
{ 
    // ...... Initialize everything. 

     state = S_SET_DELAY; 

     while (1) 
     { 
         StackTask(); 
         StackApplications(); 
         MainApplication(); 
     } 
} 

void MainApplication (void) 
{ 
    switch (state) { 
         case S_SET_DELAY: 
              time = TickGet(); 
              state = S_DELAY_WAIT; 
              break; 
         case S_DELAY_WAIT: 
              if ( (TickGet() - time) >= 1*TICK_SECOND ) { 
                   state = S_DELAY_DONE; 
              } 
              break; 
         case S_DELAY_DONE: 
              state = S_RUN_LED; 
              break; 
         case S_RUN_LED: 
              RUN_LED ^= 1; 
              state = S_SET_DELAY; 
              break; 
         default: 
              break; 
     } 
}

By the way, I'm quite new in PIC microcntrollers as well as TCP/IP, is there any nice tutorial I can use? Especially about the Microchip TCP/IP stack. Thank you.

 

[horace1]

what exactly is your problem - are you missing TCP/UDP packets ? how much traffic is there?

I have used a PIC18F97J60 (which has an onboard Ethernet controller) with various devices attached (LCD, LEDs, barcode reader, RTC, IO extenders, etc) without problems. However, the traffic was low consisting of a data UDP packet transmiited every 10 seconds and a control UDP packet arriving a few times per hour.
If you have high traffic rates I would suggest moving to a PIC32MC6xx series.



if you do a web sreach for "microchip tcp ip stack tutorial" it will give you links to lots of information

 

[LongYC]

Turned out it was the ISR bug of the TickGet() but thank you for your reply anyway, for your willingness to help.