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IanM

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Everything posted by IanM

  1. if(101<=sel<=150) and similar is no good. Replace with if(101<=sel && sel<=150) Remove the semicolons from the end of ALL the #defines!
  2. Goes with: Unimplemented pins read as '0', and is almost certainly for backwards compatibility. Thanks - its a useful correction.
  3. There is no 'which then gets written'. All writes to either goto LATx and appear on output pins immediately. Yes. Yes. No. LATx always reads as the last value written to it. You need to read section 11.1.2 Output Data Latches (LATx) and Data Direction Register (TRISx) of the PIC18 family reference manual DS39500A. Meanwhile, the attached image may help!
  4. *CONFIRMED* See the example: %ProgramFiles%\SourceBoost\Samples\Basic\interrupt.pic16.bas There is a documentation error and NONE of the program entry points should have capitalised initial letters, so its: main(), interrupt() and interrupt_low(), NOT: Main(), Interrupt() and Interrupt_low(). This is fairly logical as these are handled by the linker which is common to alll the Boost languages and C/C++ require case sensitivity and use all lower case entry point names. To see *exactly* what is happening, open the .casm file for your project after a successful link and you will see
  5. I have some PIC16F887 code hanging around. It wil need a few changes for your PIC: /*********************** PWMTEST ****************/ /* For PIC16F887 on Microchip 44-Pin Demo Board */ /* in Pickit 2 Debug Express kit */ /* Takes AN0 ADC input (from pot) and outputs */ /* inverted value as PWM on RC2. */ /************************************************/ #pragma CLOCK_FREQ 8000000 #include <PIC16F887.h> #include <boostc.h> #include <adc.h> //see DS41291E, page 210 #pragma DATA _CONFIG1, _LVP_OFF /* RB3 pin is digital I/O, HV on MCLR must be used for programmin
  6. For MOST PIC16 and PIC18 parts, the MINIMUM VREF (VREF+ - VREF-) is approx VDD_MAX/2. Check your datasheet for the minimum Vref for YOUR PIC! It will NEVER work properly with only 0.5V difference.
  7. Symantec have a certain reputation for false positives. Programs that patch or generate windows executables or DLLs frequently are misdetected as after all that is what viruses are trying to do. Anyone who has used a PC C compiler regularly will know that the output directory usually needs excluding from any virus scans. I GUESS that PREG may be doing something to the windows binaries so that they can be traced back to a particular licence number and customer for obvious licensing reasons and this is what has triggered it. IMHO you should report the false positive to Symantec in the hope t
  8. Read [THIS] on strings in C source code in ANSI C90. IMHO you should try the 'ajacent strings combine' method. rom char *httpHeader1 = "<html>" "<head>" "<title>Tower-Cam Test</title>" "<body>" "<h2>Tower Camera Sensors </h2>" "<p>Battery Voltage goes here:</P>" "<p> Temperature goes here:</p>" "<p>Time goes here:</p>" "</body>" "</html>"; //End of httpHeader1 string If that doesn't work, fall back line continuation characters (DavidB's post above) that I have used in #d
  9. Yes '$' has been around a while. IIRC I first met it in the early '80s in Hisoft GENS3 - a Z80 assembler: I dont expect to see MPASM object files used internally, because BoostLink does some special stuff that the Microchip linker doesn't handle. For similar reasons HiTech provide their own linker for PICC, however it would be nice to be able to 'import' MPASM format object files. Also you don't need a better list file, just open the .casm file!
  10. I dont think BoostC supports the MPASM $ operator (or most other complex MPASM expressions) :-( That's why a number of us are agitating for the capability to write library functions for BoostC in MPASM/GPASM. To get it 'all in one' why not try: //Make a 16 bit long value from adresh:adresl registers #define ReadADC( dst ) asm base: /* only legal place for a label */ \ asm bsf _adcon0,1 \ asm movlw 0x01 \ /*loopi:*/ asm addlw 0x01 \ asm btfss _status,0 \ asm bra _base+2 /*_loopi*/ \ asm bcf _adcon0,1 \ asm comf _adresl, W \ asm movwf
  11. Any chance of a 'quick fix' for the V6.97 and V7 IDEs based on installing the MPASM V5.20 I linked to in post#8? At least I could then reccomend your IDE again to people struggling with MPASM code and the MPLAB simulator. Your graphical plugin based debugger, although not as capable 'out the box' as the MPLAB one with scripting in SCL, is far easier for a novice or occasional user (or who cant afford the other graphical alternative - Proteus) to get to grips with and is far more stable. Once they are using the SourceBoost IDE it is obviously going to be easier to persuade them to try the
  12. While debugging is this badly broken I find it difficult to reccomend SourceBoost to others. In fact I also regard it as a 'dealbreaker'. Getting MPASM and 3rd party toolsuites working again under the SourceBoost IDE and also sorting out the GPIO plugin problem (maybe by aliaiasing GPIO to PORTA?) should be given a MUCH higher priority as your IDE's interoperability with Microchip's language suites and the quality of the MPLAB integration of your Boost.... language suits has been a major factor in me recommending SourceBoost over other third party development enviroments that lock you in
  13. Back in the days of TTL logic, one usually wired LEDs between the output and +5V (with a resistor), and almost always wired swirches between the input and 0V, with a pull-up resistor if you were sensible (TTL didn't really float). This was because of the asymmetric input and output stages of TTL. You will still see a lot of circuits that use inverted logic (0=ON) for LEDs and switches, even 30 years later with a different IC technology and it isn't all the ossified habits of those 'old farts' still in the design game! If you look carefully at the output specs in the datasheet, you wil
  14. EEEEEErrrrrr........ The PIC16F877 doesn't HAVE any comparitors! According to Microchip they were introduced in the PIC16F877A. Now Microchip doesn't always tell us if they've goofed and put in the silicon for some feature that dosn't work - so the PIC16F877 may actually secretly HAVE comparitors that DON'T WORK! Please see Microchip's DS39591A 'PIC16F87X to PIC16F87XA Migration' for comfirmation of this. HTH Ian http://ww1.microchip.com/downloads/en/DeviceDoc/39591a.pdf
  15. Answered on Microchip Forum: Hex copies to PIC18F4525 but fails to run Basically the problem appears to be missing config settings in the hex file.
  16. I posted on this subject a while back on the Microchip forum [here]: Try it. The work-around should be acceptable until It can be fixed in an early V7.x. While we are on the subject the Hitech PICC toolsuite is also broken for similar reasons. It passes obsolete options to the compiler that currently available versions do not understand. As a result, I cannot even build PICC programs under the SourceBoost IDE, let alone debug them. :-(
  17. Multiple LED Bar plugins At Your Own Risk Its not as good as Flexibuttons, but if you follow this procedure: Exit the IDE and locate and open its program folder Make a copy of ledblock.dll, and rename it to ledblok2.dll. Open ledblok2.dll in a hex editor and patch as follows: Search for and replace the string 'ledblock' with 'ledblok2'My v6.96 plugin has two occurrences, at 0x523C in the filename and 0x611C in a string table. Change both. [*]Search for and replace the string 'Led Block' with 'LED Blok2' My v6.96 plugin has one occurrence, at 0x6128 immediately after the '
  18. Glad to have been able to help. Even the masters can use a hint occasionally I suggest Mario tries: #include <system.h> volatile unsigned char b; // for PORTB reading void interrupt(void) { b=portb; // clear mismatch intcon&=0b11111110; // reset IF porta++; } void main() { trisb=255; trisa=0; porta=0; b=portb; // clear initial mismatch intcon=0b11001000; // enable IR's while (1); } Mario, Before teaching this to a class *PLEASE* stop using minimally commented 'magic numbers' even though they are in binary so can be easily referred to the datasheet.
  19. Dave, Shoudn't that be: void interrupt(void) { char a = portb; // read port to stop repeated interrupts for same port value intcon&=0b11111110; // clear PortB IF porta++; } I belive you *must* deal with the mismatch before you CAN clear the flag. This is definately the case on PIC16s and IIRC also PIC18s. Mario, You will also need to end the mismatch before initially enabing the interrupt: char a = portb; // read port to stop repeated interrupts for same port value intcon=0b11001000; // GIE on , PEIE on, RBIE on Also discarding the value in a temp vari
  20. There is no reason why it shouldn't work. There are a few small issues though. I'll have to 'talk around them' as I am referring to the Library source which is only available to NOVO and BoostC PRO licence holders, so I can't disclose it There used to be as function adc_init() which had exactly the same effect as the code block in the manual, (immediately after 'A sample ADC initialization can look like:'). It is commented out in the library source as the user needs to be able to adjust Tad for their clock speed. Use the initialisation given starting at the second line, and dont
  21. Many PICs have a gateable 16 bit Timer 1. You need to zero the timer, and wait for the gate input to start it. then wait for it to stop and read it. The gate polarity is selectible. It is usually possible to gate Timer 1 off a comparitor, which will give you an interrupt at the start of the period which can be cleared and ignored and at the end of it where you read the timer and re-zero it. On some PICs you may be able to enable IOC on the T1G pin to similar effect. You CANNOT have this functionality on an arbitary pin unless you do it in software. Either interrupt driven po
  22. For a PICkit 2 I use: C:\PROGRA~1\MICROC~1\PK2CMD\pk2cmd.exe /BC:\PROGRA~1\MICROC~1\PK2CMD\ /P%target% /R /T /M /F See this old post for an explanation. Try "C:\Program Files (x86)\Microchip\MPLAB IDE\Programmer Utilities\PICkit3\pk3cmd" /P%target% /M /F
  23. If you have a PICKIT 2 or 3, download PK2CMD or PK3CMD from microchip and set up the Sourceboost IDE to invoke that as the programmer and you will have a 'seamless' development enviroment. Unfortunately in circuit debugging still requires MPLAB.
  24. Although you want to receive data from a GPS, you may do better getting over the serial comms learning curve communicating with a terminal program on a PC. Simple stuff like type a single digit hex number on the PC and get the PIC to display the binary value on four LEDs or send 'Switch 1' or 'Switch 2' etc. to the PC as you press some buttons. Once you have that working OK, reading and parsing NMEA0183 data will be a lot easier.
  25. MPLAB 8.50 is belived to have a *lot* of debugger related bugs and many peopel on the Microchip forums are having trouble with it. The general reccomendation is to downgrade to a 8.4x version if you are having trouble with 8.50.
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