DP256 : oscillateur

Started by Anonymous in 68HC1220 years ago 3 replies

Hi Guillermo Do you have a schematic of this? Do you use a 16MHz oscillator or quartz which type of system (P or C) is ...

Hi Guillermo Do you have a schematic of this? Do you use a 16MHz oscillator or quartz which type of system (P or C) is better? We cannot go higher than 36MHz with a first evaluation board DP256 from Motorola !!! Best regards Jean-Pierre


DP256 BDM

Started by Toby Merridan in 68HC1220 years ago 1 reply

Hi Folks, I have an application using a DP256 where the program may need to be changed in the field. Does the Chip...

Hi Folks, I have an application using a DP256 where the program may need to be changed in the field. Does the Chip automatically detect when the BDM Port is connected to? Is this the correct way to initiate Program updated to a finished product using this chip?


Help with DP256 'C' Code

Started by Toby Merridan in 68HC1220 years ago 9 replies

I am a hardware engineer who has managed to cobble together some test code for this HCS12 project (dp256) basically I have set up a...

I am a hardware engineer who has managed to cobble together some test code for this HCS12 project (dp256) basically I have set up a RS232 link back to windows terminal. I am testing some inputs (SPI bus) and Digital Outputs, printing some blurb onto the screen when each channel is switched


Problem using function pointers in HC12 (DP256)...

Started by mdn4u in 68HC1219 years ago 2 replies

Hi All, We are using DP256(HC12) target environment for our project and facing problems when we try to use function pointers....

Hi All, We are using DP256(HC12) target environment for our project and facing problems when we try to use function pointers. We are using an array of function pointers for implementing callback functions. The problem is, when we try to call the function using the ar


Problem in loading file into flash of DP256....

Started by Yogeesh in 68HC1219 years ago 1 reply

Hi, We have problems loading our .h12 file into DP256 in Evaluation Board M68KIT9S12DP256. This is in our '.lkf' file.. ...

Hi, We have problems loading our .h12 file into DP256 in Evaluation Board M68KIT9S12DP256. This is in our '.lkf' file.. ----- +seg .data -b0x800 -m0x1b57 -n.data # data start address +seg .eeprom -b0x400 # eeprom start address if needed +def __sbss=@.bss # s


CAN Programming

Started by kuinton in 68HC1219 years ago 2 replies

Does anyone have any sample code to transmit and receive messages through the CAN port for the DP256 model of HC12? Please let me ...

Does anyone have any sample code to transmit and receive messages through the CAN port for the DP256 model of HC12? Please let me know... i tried to program it, but it ended up that i was using the wrong version... and the registers were all in a different place, and confusion en


How to detect Stack Overflow

Started by apedroso11 in 68HC1216 years ago 6 replies

Hi all, Is there any way to detect a Stack Overflow while debuggin with codewarrior 3.1 on a HCS12 DP256? (other than expending a lot of...

Hi all, Is there any way to detect a Stack Overflow while debuggin with codewarrior 3.1 on a HCS12 DP256? (other than expending a lot of time searching where some of your RAM variables have been overwritten) thanks


SDI Tools

Started by Lewis, Bob in 68HC1220 years ago 6 replies

You can try the product from www.elektronikladen.de compod12. There is a beta test for the DP256 part now; although I have not used...

You can try the product from www.elektronikladen.de compod12. There is a beta test for the DP256 part now; although I have not used the beta, given my past knowledge of the company, it will be perfected very soon. Elektronikladen does reference designs for Motorola and the quality of their


using codewarrior without a BDM

Started by oulaxer11 in 68HC1219 years ago 4 replies

More Noob question - I have an Axiom Board with the HCS12 - DP256 I wrote a VERY simple C program in codewarrior and tested...

More Noob question - I have an Axiom Board with the HCS12 - DP256 I wrote a VERY simple C program in codewarrior and tested it... I want to download it to the flash of the HCS12 using the AxIDE but when i try to upload the S - record i get a ROM error, which ma


S12DP256 and the ECT

Started by jb_tempe_jb in 68HC1219 years ago 3 replies

Hi, I'm attempting to write some code to use the modulus down counter for the DP256. No interrupts, simple gadfly loops looking...

Hi, I'm attempting to write some code to use the modulus down counter for the DP256. No interrupts, simple gadfly loops looking for the underflow flag. Oh, yeah, I'm using code warrior 3 and writing the program in C. My problem is that I can't write anythin


HCS12 to HCS12 communication

Started by deaninkc in 68HC1218 years ago 9 replies

While looking around for a way to interface a DP256 processor to SD memory card and USB. I ran across the MC9S12UF32 processor that has ...

While looking around for a way to interface a DP256 processor to SD memory card and USB. I ran across the MC9S12UF32 processor that has hardware interfaces to both. The problem is it does not have a SPI or CAN interface or the AD that I need, so I though I would use both processors. I'm assuming I can somehow communicate between the two processors usi


BDM and CAN BUS interaction

Started by Longworth, Kevin in 68HC1220 years ago 3 replies

When I use the Isystem BDM for the Star12 DP256, and using some third party CAN software, I get a TRUE returned from a function...

When I use the Isystem BDM for the Star12 DP256, and using some third party CAN software, I get a TRUE returned from a function which tells if the bus is in limp home mode. When this happens it is OK to disable the CAN tranciever, which I do by pulling the ENE and STBY pins low. Wi


Looking for D-Bug12 v4.0.0b14 Source Code

Started by mosejos in 68HC1219 years ago 12 replies

Hi, I am using the DP256 ad would like to know how the D-Bug12 v4.0.0b14 in POD mode works, I am trying to write firmware ...

Hi, I am using the DP256 ad would like to know how the D-Bug12 v4.0.0b14 in POD mode works, I am trying to write firmware similar to what the DBUG12 does to talk to a target board specifically the fuctions FBULK, FLOAD. Thanks in advance, MOsejos Design E


EETS4K EPROT Register

Started by Adrian Vos in 68HC1219 years ago 11 replies

Hi All, I am playing with the EETS4K module on a DP256. I am using this memory space to hold configurable data that can be...

Hi All, I am playing with the EETS4K module on a DP256. I am using this memory space to hold configurable data that can be altered by serial connected PC software. I find that this memory occasionally gets erased on power up or shutdown, and I think it could be due to not usin


S-record and the Sreccvt with Cosmic

Started by Frank in 68HC1217 years ago 4 replies

Hi, I am using a DP256 device with the Cosmic tool chain. My program works fine when downloaded via Zap tools. However i need a even...

Hi, I am using a DP256 device with the Cosmic tool chain. My program works fine when downloaded via Zap tools. However i need a even boundary paged based srecord for manual programming. My problem is, I used the cosmic chex to generate the srecord as follows, chex -p -o out.s in.o I used the above file with SRECC


CANbus driver

Started by Francois in 68HC1220 years ago 6 replies

Hi, What will be a simple CAN bus driver. Can I just connect a half duplex multi-drop RS485 driver to the TX and RX pins. How...

Hi, What will be a simple CAN bus driver. Can I just connect a half duplex multi-drop RS485 driver to the TX and RX pins. How does the DP256 CAN handle the TX enable of a RS485 chip for instance. I suppose that a isolated configuration is possible with a one wire current


SRecCvt parameters DP256

Started by johnpititto1976 in 68HC1219 years ago 4 replies

Hi All, I have almost finished my bootloader program(thanks to great suppport on this message board), except for figuring out...

Hi All, I have almost finished my bootloader program(thanks to great suppport on this message board), except for figuring out the correct parameters for the motorola S-Record formatting program SRecCvt. I have been passing the string, sreccvt.exe -b 16 0x30 32 -rf -o


HCS12 COP Reset

Started by Adrian Vos in 68HC1218 years ago 2 replies

Hi All, I am using the DP256. I am using the COP reset to initiate a desired reset at times, but I am also trying to use it to...

Hi All, I am using the DP256. I am using the COP reset to initiate a desired reset at times, but I am also trying to use it to detect corrupted firmware (the application is field programmable firmware upgradable with protected firmware permanent). I was planning on detecting t


ADC HCS12 DP256

Started by hellfire1272000 in 68HC1220 years ago 4 replies

I would like some help in putting together some C Code to set-up and read one ADC Channel continuously and also set-up and Scan...

I would like some help in putting together some C Code to set-up and read one ADC Channel continuously and also set-up and Scan through multiple ADC channels continuously. I have Codewarrior for HCS12.Some help would be appreciated as I am a newcommer to embedded.


EVB 912DP256 SCI Problems

Started by nealskura in 68HC1220 years ago 2 replies

Hello, I am currently writing development software for the HCS12 DP256 EVB. I am trying to test software functionality through...

Hello, I am currently writing development software for the HCS12 DP256 EVB. I am trying to test software functionality through SCI data dumps to a HyperTerminal program running on my workstation. Currently, I am not getting any input in HyperTerminal. As I trace