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Discussion Groups | 68HC12 | can't find port A/B info
Join our technical discussions about Freescale Microcontrollers: M68HC12. (Freescale Semiconductor is a Subsidiary of Motorola).
can't find port A/B info - ctrobot28 - Sep 27 13:57:00 2003
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I've got an LCD hooked to a 9S12DP256, via port A for data and the top 3 bits of port B for control (it's in normal single chip mode). Naturally, it's not working. I've set the DDR bits for the ports, but I don't know if there's anything else I should set for port control, and I can't find any documentation for these ports. In the 9S12DP256 User Guide it just says to refer to the "core" user guide; what does that mean? (I've got the zip file with the whole set, + HCS12 core guide, it's not there.) In the PIM guide it says to refer to MEBI in, again, the core user guide for those ports, again I can't find anything on MEBI anywhere. Can someone point me to this core guide with port A/B and MEBI info? |
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Re: can't find port A/B info - Peter Lissenburg - Sep 27 20:20:00 2003
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Yes the manuals are a mess. I usually use the last "whole book" .pdf file unless things go strange. As for the A and B ports there is only a DDR to worry about. If you have these right then I'd be looking elsewhere for the problem. PL At 06:57 PM 27/09/2003 +0000, you wrote: >I've got an LCD hooked to a 9S12DP256, via port A for data and the >top 3 bits of port B for control (it's in normal single chip mode). >Naturally, it's not working. I've set the DDR bits for the ports, but >I don't know if there's anything else I should set for port control, >and I can't find any documentation for these ports. In the 9S12DP256 >User Guide it just says to refer to the "core" user guide; what does >that mean? (I've got the zip file with the whole set, + HCS12 core >guide, it's not there.) In the PIM guide it says to refer to MEBI in, >again, the core user guide for those ports, again I can't find >anything on MEBI anywhere. Can someone point me to this core guide >with port A/B and MEBI info? > > >-------------------------------------------------------- >To unsubscribe from this group, send an email to: >To learn more about Motorola Microcontrollers, please visit >http://www.motorola.com/mcu |
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Re: can't find port A/B info - Oliver Thamm - Sep 28 7:41:00 2003
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Hi ctrobot28, you are right - the main document for the DP256B is the "MC9S12DP256B Device User Guide" which contains a table with "Document References". There one can find a reference to "HCS12 V1.5 Core User Guide" with a document name "HCS12COREUG". I have recently spent an hour or so to find and download this document from the Motorola Web server - w/o success. Wasting time is the main issue with the new "modular" document approach, anyway. Is it that much work to compile a one-file data book for each HCS12 derivative? ... Anyway, meanwhile I have found a copy if this file somewhere on a harddisk backup, so if this is what you are looking for as well, I can send it over off-list. Happy HCS12ing! Oliver On Sat, 27 Sep 2003 18:57:32 -0000 "ctrobot28" <> wrote: > I've got an LCD hooked to a 9S12DP256, via port A for data and the > top 3 bits of port B for control (it's in normal single chip mode). > Naturally, it's not working. I've set the DDR bits for the ports, but > I don't know if there's anything else I should set for port control, > and I can't find any documentation for these ports. In the 9S12DP256 > User Guide it just says to refer to the "core" user guide; what does > that mean? (I've got the zip file with the whole set, + HCS12 core > guide, it's not there.) In the PIM guide it says to refer to MEBI in, > again, the core user guide for those ports, again I can't find > anything on MEBI anywhere. Can someone point me to this core guide > with port A/B and MEBI info? > > > -------------------------------------------------------- > To unsubscribe from this group, send an email to: > To learn more about Motorola Microcontrollers, please visit > http://www.motorola.com/mcu > |
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Re: can't find port A/B info - Johnny Flores - Sep 28 12:03:00 2003
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Is this file too large to post in the "Files" area for this group? I'm using
the 'S12 on a Dragon12 board and would like to see it, too. Thanks! J ----- Original Message ----- From: Oliver Thamm To: Sent: Sunday, September 28, 2003 7:41 AM Subject: Re: [68HC12] can't find port A/B info Hi ctrobot28, you are right - the main document for the DP256B is the "MC9S12DP256B Device User Guide" which contains a table with "Document References". There one can find a reference to "HCS12 V1.5 Core User Guide" with a document name "HCS12COREUG". I have recently spent an hour or so to find and download this document from the Motorola Web server - w/o success. Wasting time is the main issue with the new "modular" document approach, anyway. Is it that much work to compile a one-file data book for each HCS12 derivative? ... Anyway, meanwhile I have found a copy if this file somewhere on a harddisk backup, so if this is what you are looking for as well, I can send it over off-list. Happy HCS12ing! Oliver On Sat, 27 Sep 2003 18:57:32 -0000 "ctrobot28" <> wrote: > I've got an LCD hooked to a 9S12DP256, via port A for data and the > top 3 bits of port B for control (it's in normal single chip mode). > Naturally, it's not working. I've set the DDR bits for the ports, but > I don't know if there's anything else I should set for port control, > and I can't find any documentation for these ports. In the 9S12DP256 > User Guide it just says to refer to the "core" user guide; what does > that mean? (I've got the zip file with the whole set, + HCS12 core > guide, it's not there.) In the PIM guide it says to refer to MEBI in, > again, the core user guide for those ports, again I can't find > anything on MEBI anywhere. Can someone point me to this core guide > with port A/B and MEBI info? > > > -------------------------------------------------------- > To unsubscribe from this group, send an email to: > To learn more about Motorola Microcontrollers, please visit > http://www.motorola.com/mcu > Yahoo! Groups Sponsor ADVERTISEMENT -------------------------------------------------------- To unsubscribe from this group, send an email to: To learn more about Motorola Microcontrollers, please visit http://www.motorola.com/mcu Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. [Non-text portions of this message have been removed] |
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Re: can't find port A/B info - Joel Waika - Sep 29 1:12:00 2003
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Hello, ctrobot28 Yes, it's very difficult to find informations about all devices in the 9s12CPU? I'm learning tha CPu... So. Informations about port A & B are in the HCS12 V1.5 "Core User Guide", page 207 and following. Also in MC9s12DP256 Device USer guide, page 25 (Detailed register map). That means : PORTA address 0x0000 PORTB address 0x0001 DDRA address 0x0002 DDRB address 0x0003 Be careful : I tried that ports for the same application, but in my evauation board (Axiom CML12SDP256), port A, B, E, K are used for the extended RAM. For that reason, I put my Lcd on port H, 4 bits interface. If you need it, I can give you all the routines in C about a LCD Display (2 lines, 40 characters). Joel ----- Original Message ----- From: ctrobot28 To: Sent: Saturday, September 27, 2003 8:57 PM Subject: [68HC12] can't find port A/B info I've got an LCD hooked to a 9S12DP256, via port A for data and the top 3 bits of port B for control (it's in normal single chip mode). Naturally, it's not working. I've set the DDR bits for the ports, but I don't know if there's anything else I should set for port control, and I can't find any documentation for these ports. In the 9S12DP256 User Guide it just says to refer to the "core" user guide; what does that mean? (I've got the zip file with the whole set, + HCS12 core guide, it's not there.) In the PIM guide it says to refer to MEBI in, again, the core user guide for those ports, again I can't find anything on MEBI anywhere. Can someone point me to this core guide with port A/B and MEBI info? [Non-text portions of this message have been removed] |
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