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Forum Index : Microcontroller and PC projects : Checking options at runtime
| Author | Message | ||||
| TrevorH Senior Member  Joined: 06/04/2018 Location: United KingdomPosts: 145 |
Hi everyone! Is there anyway to check that an option has been set VERY early in a program before running the meat of the program and if not set giving an early exit without crashing the pic32? Trevor |
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twofingers Guru  Joined: 02/06/2014 Location: GermanyPosts: 1671 |
Yes, I guess a CFunction would easily do that. From CFunctions.h //The Option structure struct option_s { char Autorun; char Tab; char Invert; char Listcase; char Height; char Width; int PIN; int Baudrate; int ColourCode; // display related char DISPLAY_TYPE; char DISPLAY_ORIENTATION; // touch related char TOUCH_CS; char TOUCH_IRQ; char TOUCH_SWAPXY; int TOUCH_XZERO; int TOUCH_YZERO; float TOUCH_XSCALE; float TOUCH_YSCALE; // for the SPI LCDs char LCD_CD; char LCD_CS; char LCD_Reset; // Note the next options are only applicable to the MM+ char SerialCon; char SDCARD_CS; char SD_CD; char SD_WP; char DISPLAY_BL; char DISPLAY_CONSOLE; char DefaultFont; char KeyboardConfig; char TOUCH_Click; // To enable older CFunctions to run any new options *MUST* be added at the end of the list But I can't do that at this time.  Regards Michael causality ≠correlation ≠coincidence |
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| TrevorH Senior Member Joined: 06/04/2018 Location: United KingdomPosts: 145 |
Thankyou for your reply, but I don't understand what you are telling me. The problem I have is:- my program uses the RTC on an E100 board, if I run the program without setting the RTC options, it crashes the PIC32. This forces me to do the multiple !!!!! thing to recover. I would like to trap the fact that the RTC options are Not set BEFORE I run any more code. Trevor. |
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| twofingers Guru Joined: 02/06/2014 Location: GermanyPosts: 1671 |
Upps, I guess there are no Cfunctions for the E100 (MMX?) possible. Maybe Geoff or Peter have an idea? I am Sorry! causality ≠correlation ≠coincidence |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 10570 |
E100 is MM+ so no issue with cfunctions |
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| PicFan Senior Member Joined: 18/03/2014 Location: AustriaPosts: 133 |
Maybe is this a solution ? ON ERROR SKIP RTC GETTIME IF (MM.ERRNO <> 0) THEN PRINT "NO RTC OPTION" END ENDIF |
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| TrevorH Senior Member Joined: 06/04/2018 Location: United KingdomPosts: 145 |
I think by running a RTC command is what is crashing the PIC when RTC options NOT set, but will check this out. I was wondering if there is a way of checking which options are set or not Before running device dependant code. @twofingers I am running a CFunction to enable a CPLD TFT screen already Trevor. |
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| twofingers Guru Joined: 02/06/2014 Location: GermanyPosts: 1671 |
Trevor, I fear there is no access (not yet) to the RTC options. I don't have a MM+ so I can't test with it.  causality ≠correlation ≠coincidence |
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CircuitGizmos Guru Joined: 08/09/2011 Location: United StatesPosts: 1427 |
I test for the RTC address having a device first before doing an RTC GETTIME. I2C open 100, 1000 ' I2C enable at 100kHz with 1000ms time out I2C read &H68, 0, 1, temp ' 3231 I2C address IF MM.I2C = 0 Then RTC GETTIME EndIf I2C close Micromites and Maximites! - Beginning Maximite |
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| TrevorH Senior Member Joined: 06/04/2018 Location: United KingdomPosts: 145 |
@CircuitGizmos . Thanks for that I will give it a whirl. Trevor |
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| erbp Senior Member Joined: 03/05/2016 Location: AustraliaPosts: 195 |
I don't know if the following will help, but this is what I use to detect whether the RTC module is present or not on a MX170 which doesn't have an OPTION RTC … command. SETPin Pin_Brake, Off 'release Pin 18 SetPin Pin_Reverse, Off 'release Pin 17 Pause 50 I2C Open 100, 200 'Open the I2C communication session Pause 100 On Error Skip 1 RTC GetTime 'Set MM Date & Time from RTC module via I2C If MM.ERRNO <> 0 then 'RTC not present (or failed to communicate) - Reset RTC_Flag RTC_Flag = 0 etc. etc. In this case I am even sharing the I2C pins with other functions and release them before opening the I2C connection and attempting to get the date/time from the RTC module. I have NOT tried this approach on an E100 using the OPTION RTC … command. Phil. |
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| robert.rozee Guru Joined: 31/12/2012 Location: New ZealandPosts: 2463 |
on the face of it, this behaviour sounds like a bug in the mmbasic firmware. can peter or goeff comment? cheers, rob :-) |
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Geoffg Guru Joined: 06/06/2011 Location: AustraliaPosts: 3308 |
If you do not set the RTC option the RTC GETTIME command will try to use the standard I2C interface and if it cannot find the rtc it will give a message "RTC not responding". It will not cause the PIC32 to crash. I don't know what is going on here but it is not the RTC command. Geoff Geoff Graham - http://geoffg.net |
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