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Hi, is there a way to generate a reset from software on the 9S12DP256? Shayne C. Rich Microbial Aerosol Biodetection System 1780 N Research Park Way North Logan, UT 84341 Tel: 435-797-3431 Fax: 435-797-3328 |
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Software reset
Started by ●July 2, 2004
Reply by ●July 2, 20042004-07-02
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For testing: You can use the watchdog, when it times out, a reset occurs. Hossam "Shayne C. Rich" <> wrote: Hi, is there a way to generate a reset from software on the 9S12DP256? Shayne C. Rich Microbial Aerosol Biodetection System 1780 N Research Park Way North Logan, UT 84341 Tel: 435-797-3431 Fax: 435-797-3328 --------------------------------- Yahoo! Groups Links To --------------------------------- |
Reply by ●July 2, 20042004-07-02
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Isn't there a reset register? Poke a value. Look in the register
table. -----Original Message----- From: Shayne C. Rich [mailto:] Sent: Friday, July 02, 2004 1:26 PM To: Subject: [68HC12] Software reset Hi, is there a way to generate a reset from software on the 9S12DP256? Shayne C. Rich Microbial Aerosol Biodetection System 1780 N Research Park Way North Logan, UT 84341 Tel: 435-797-3431 Fax: 435-797-3328 Yahoo! Groups Links |
Reply by ●July 2, 20042004-07-02
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One simple way is to connect an output pin to the reset line. Regards Dave Shayne C. Rich wrote: >Hi, is there a way to generate a reset from software on the 9S12DP256? > >Shayne C. Rich >Microbial Aerosol Biodetection System >1780 N Research Park Way >North Logan, UT 84341 >Tel: 435-797-3431 >Fax: 435-797-3328 > > >Yahoo! Groups Links |
Reply by ●July 2, 20042004-07-02
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Enable the COP Watchdog, then write a data different from $55 or $AA to the
ARMCOP register. This will generate an immediate Reset (the COP Watchdog Reset Vector at $FFFA will be used when exiting from the Reset, rather than the General Reset Vector at $FFFE). Doron Nohau Corporation HC12 In-Circuit Emulators www.nohau.com/emul12pc.html At 13:25 02/07/2004 -0600, you wrote: >Hi, is there a way to generate a reset from software on the 9S12DP256? > >Shayne C. Rich >Microbial Aerosol Biodetection System >1780 N Research Park Way >North Logan, UT 84341 >Tel: 435-797-3431 >Fax: 435-797-3328 > |
Reply by ●July 5, 20042004-07-05
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Why dont you use the SWI instruction
--- "Shayne C. Rich" <> escribi > Hi, is there a way to generate a reset from software > on the 9S12DP256? > > Shayne C. Rich > Microbial Aerosol Biodetection System > 1780 N Research Park Way > North Logan, UT 84341 > Tel: 435-797-3431 > Fax: 435-797-3328 > > > [Non-text portions of this message have been > removed] > > ------------------------ Yahoo! Groups Sponsor > --------------------~--> > Yahoo! Domains - Claim yours for only $14.70 > http://us.click.yahoo.com/Z1wmxD/DREIAA/yQLSAA/dN_tlB/TM > --------------------------------~-> > Yahoo! Groups Links > > _________________________________________________________ |
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Reply by ●July 5, 20042004-07-05
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> -----Original Message----- > From: Mr angel castillo [mailto:] > Sent: Monday, July 05, 2004 6:37 PM > To: > Subject: Re: [68HC12] Software reset > Why dont you use the SWI instruction That would be a bad idea, since that generates a software interrupt. Mike Anton |
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Reply by ●July 6, 20042004-07-06
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>> Why dont you use the SWI instruction > That would be a bad idea, since that generates a software interrupt. Therefore the processor is not returned to its power on state - anything that was configured prior to SWI will still be configured. Andrew |
Reply by ●July 8, 20042004-07-08
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Why? You can use SWI and then in the service SWI routine: -reset your peripherals -jump to the begin of your program like rhe MCU get the reset vector end jump to this address > > > > Why dont you use the SWI instruction > > That would be a bad idea, since that generates a > software interrupt. > > Mike Anton > > ------------------------ Yahoo! Groups Sponsor > --------------------~--> > Yahoo! Domains - Claim yours for only $14.70 > http://us.click.yahoo.com/Z1wmxD/DREIAA/yQLSAA/dN_tlB/TM > --------------------------------~-> > Yahoo! Groups Links > > _________________________________________________________ |
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Reply by ●July 8, 20042004-07-08
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At 01:28 PM 7/8/2004, you wrote: >Why? > >You can use SWI and then > >in the service SWI routine: >-reset your peripherals But you cannot generate a /RESET output from the MCU the way a real reset does. This means that external devices that depend on the MCU /RESET signal for reset do NOT get it. It also requires to correctly duplicate what /RESET does to all the on-chip peripherals. Enabling the COP and forcing a COP reset by writing 0xf0 ( or anything not 0x55 or 0xAA ) to ARMCOP is better. Hope this helps Steve Russell Nohau Emulators >-jump to the begin of your program > >like rhe MCU get the reset vector end >jump to this address > > > > > > > Why dont you use the SWI instruction > > > > That would be a bad idea, since that generates a > > software interrupt. > > > > Mike Anton > > > > > > > > ------------------------ Yahoo! Groups Sponsor > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > > > >_________________________________________________________ > > >Yahoo! Groups Links > > |
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