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lecutus
Joined: 12 Aug 2009 Posts: 40
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What is this? |
Posted: Fri Sep 04, 2009 12:36 pm |
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What is this? I trying some printf's to check on some behaviour and I got what I think is some hex stuff. Regardless I need to identify what ever it is. I don't think I asked for this.
First the unidentified:
[90] [C9] [C9] [C9] [C9] [C9] [C9] ) [CB] k [A5] [91] [95] [81]
The log format in which it was found
09/04/2009 09:36:57.406 --> while_cnt = 105
09/04/2009 09:36:57.406 --> while_cnt = 106
09/04/2009 09:36:57.406 --> while_cnt = 107
09/04/2009 09:36:57.406 --> while_cnt = 108
09/04/2009 09:36:57.421 --> while_cnt = 109
09/04/2009 09:36:57.421 --> wh [C9] [C9] [C9] [C9] [C9] [C9] [C9] ) [CB] k [A5] [91] [95] [81] main XXXXXX>>>>>>>>>>>>XXXX
09/04/2009 09:36:57.421 --> b4 pir1 = 00, tmr1if = 00
09/04/2009 09:36:57.421 --> afta pir1 = 00, tmr1if = 00
09/04/2009 09:36:57.421 --> just b4 read_E_data
09/04/2009 09:36:57.421 --> Id_Num= 5000 Engine=01 Trans=03
09/04/2009 09:36:57.437 --> while_cnt = 1
09/04/2009 09:36:57.453 --> while_cnt = 2
09/04/2009 09:36:57.453 --> while_cnt = 3
And the code that produced it:
Code: |
void main()
{
int1 va;
int8 while_cnt=0;
//line_feed();
printf(".......inside main XXXXXX>>>>>>>>>>>>XXXX"); line_feed();
set_tris_a(0xff);
set_tris_c(0xBF);
setup_timer_1(t1_internal|t1_div_by_8); //setup timer #1
can_init(); //init can module
setup_wdt(wdt_on);
set_timer1(0xBDC); //init timer #1
printf("b4 pir1 = %x, tmr1if = %x ",pir1,tmr1if ); line_feed();
bit_clear(pir1,tmr1if);
printf("afta pir1 = %x, tmr1if = %x ",pir1,tmr1if ); line_feed();
printf("just b4 read_E_data");line_feed();
read_e_data(); //reads stored values from eeprom
//printf("just afta read_E_data");line_feed();
while(TRUE)
{
//printf("ENTERING >>>>>>>>>>>>>> , inside while (true)"); line_feed();
va = bit_test(pir1,tmr1if);
//printf("Bit_test = value = %x, pir1 = %x, tmr1if = %x ", va,pir1,tmr1if ); line_feed();
while (!bit_test(pir1,tmr1if)) //sample j1939 rX for 100ms, original
{
printf("while_cnt = %u",++while_cnt); line_feed();
//printf("Bit_test = value = %x, pir1 = %x, tmr1if = %x ", va,pir1,tmr1if ); line_feed();
ck_j1939_input();
ck_rs232();
}
// printf("vvvvvvvvvvvvvvvvvvvvvv tf_data_ok=%u , tf_send_232=%u",tf_data_ok,tf_send_232);line_feed();
//tf_data_ok = true;
if (tf_data_ok) {process_rs232();} //PROCESS RS232 IF DATA IS OK
//tf_send_232 = true;
if (tf_send_232)
{rs232();} //SEND DATA STRING AFTER ANALYZING RS232 COMMANDS
// printf("^^^^^^^^^^^^^^^^^^^^^^ tf_data_ok=%u , tf_send_232=%u",tf_data_ok,tf_send_232);line_feed();
loop_cnt++;
ck_spn_fmi();
if (loop_cnt>=3) //send swi status every 300ms
{
get_swi_status();
send_swi_status();
loop_cnt=0;
}
set_timer1(0xBDC); //init timer #1
bit_clear(pir1,tmr1if);
//printf("leaving <<<<<<< inside while (true)");
//line_feed();
}
printf(".........LEAVING main <<<XXXXXXXXXXXX"); line_feed();
}
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One other bit of info, the while_cnt goes to 255, starts over goes to 108 or 109, then the above happens. and the while_cnt starts over.
So what gives?
I using pic18f258, pcwhd 4.079
Thanks L. |
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Ttelmah Guest
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Posted: Fri Sep 04, 2009 2:44 pm |
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I'd say your chip was doing a watchdog restart.
Depending on your fuses the serial line is going unconnected (floating) at the PIC pin, while it waits to ensure the oscillator has started, etc. etc..
Best Wishes |
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lecutus
Joined: 12 Aug 2009 Posts: 40
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Here's the preprocessor stuff |
Posted: Fri Sep 04, 2009 3:46 pm |
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The watchdog restart would make sense. The question remains, what is it that I'm looking at?
Below is the way the program is setup
Code: | #include <18F258.h>
#fuses HS,PROTECT,NOLVP,WDT32,nowdt
#use delay(clock=20000000)
#use rs232(baud=115200, xmit=PIN_C6, rcv=PIN_C7) // Jumpers: 8 to 11, 7 to 12
#include <can-18xxx8.c>
#byte pir1=0x0F9E
#define TMR1iF 0X00
#rom int 0xf00000={0x00,0x00,0x00,0x00}
#define offset_id 0x00
#define offset_e 0x02// original
#define offset_t 0x03// original
#include <stdlib.h>
#include <stdio.h>
#include <input.c>
int8 swi_status=0,loop_cnt=0,/*tmp_port,*/conv_lok,req_gear; //buffer counter
int8 sel_gear,cur_gear,gear, fuel_psi,oil_psi,water;
int buffer[8],rx_len,rxstat;
int32 rx_id,rx_ad,hrs;
int1 tf_lube_ovr=false/*tf_send_status=false, tf_eng_run=false*/;
//int1 tf_psi_lo=false,tf_temp_hi=false;
int16 rpm,outspeed,inspeed,pressure_out,lube_psi,lube_temp;
int16 pressure_max,crpm,volts,injt_psi,spn/*rpm_pre,rpm_total=0,rpm_temp*/;
float bpm;
int8 rm_volts,rm_hrs,alr_pump,fmi, spn_count=0,fmi_count=0/*,rpm_cnt*/;
//int32 spn_fmi;
int8 k_char,x=0;
int16 x_cnt;
int1 tf_rs232=false,tf_data_ok=false,tf_send_can=false,tf_send_232=false;
char s1[30];
//int16 rpm_rs=740,ov_press_rs=7500,pump_id=0,id_num; //original
int16 rpm_rs=900,ov_press_rs=750,pump_id=0,id_num;
int8 swi_rs=0,gear_rs=129,cnt_send_can=0,engine=0,trans=0;[code][/code][code][/code] |
Thanks
L. |
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asmboy
Joined: 20 Nov 2007 Posts: 2128 Location: albany ny
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Posted: Fri Sep 04, 2009 6:30 pm |
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the WDT32 is in conflict with nobrownout
and it wins in the masking wars
try
#fuses HS,PROTECT,NOLVP,nowdt,brownout,BORV42,noprotect
this assumes you are using a 5V supply for brownout, safe starting
and noprotect - just for fun until you are for sure debugged
i might add that with a 20 mhz clock and 115200 baud - the compiler default is allowing a baud rate error of about 1.5%
which is clearly OK - as you are receiving data
but a better choice of oscillator would be say
19.6608mhz which is a standard tho not common - can oscillator value
it results in a dead on 0.0% error in baud rate
and is ideal for your baud |
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