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Hi developer -(friends..), Reprogramming specialists! I am working heavily on CAN-Module with interfacing to 24V-I/O'S and the MC9S12DG128B. I want to Reprogramming the MC9S12DG128B FLASH Memory" at the CAN-Bus. Does anyone know how this method or program-code? Thanks in advance, sorry for my poor english Jens Plambeck |
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CAN-Loader for Reprogramming the MC9S12DG128B FLASH
Started by ●November 7, 2002
Reply by ●November 7, 20022002-11-07
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Jens Look on Motorola's web site www.mot-sps.com under 9S12 for AN2153/D (serial bootloader) and under 912BC32 for AN1828/D flash programming via CAN I used AN1828 as a starting point for programming 912D60/D60A via CAN . My application programs via RS-232 or CAN unfortunately the CAN is proprietary to my customer and the D60 and DG128 have very different Flash maps, so my code would probably be more confusing than helpful. Dale Kelley -----Original Message----- From: georgdetlef [mailto:] Sent: Thursday, November 07, 2002 5:13 AM To: Subject: [68HC12] CAN-Loader for Reprogramming the MC9S12DG128B FLASH Hi developer -(friends..), Reprogramming specialists! I am working heavily on CAN-Module with interfacing to 24V-I/O'S and the MC9S12DG128B. I want to "Reprogramming the MC9S12DG128B FLASH Memory" at the CAN-Bus. Does anyone know how this method or program-code? Thanks in advance, sorry for my poor english Jens Plambeck -------------------- ">http://docs.yahoo.com/info/terms/ ------------------------ This message is for the designated recipient only and may contain privileged, proprietary, or otherwise private information. If you have received it in error, please notify the sender immediately and delete the original. Any unauthorized use of this email is prohibited. ------------------------ |
Reply by ●November 7, 20022002-11-07
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Hi Jens, The way I see it you have a 2 different options 1) Create a separate microcontroller with CAN and a BDM port that is in addition to your HC12. This device gets CAN messages and interfaces directly with the HC12 through the BDM port. This would allow you to write to memory and do some debugging. 2) Create a monitor program that resides in the top of the HC12 memory that runs at powerup, initializes the CAN port and then checks to see if a flag is set in EE to run a user program. Incoming CAN interrupts are handled by the monitor program. CAN commands could stop the user program and sit in a loop in the monitor while download commands are reprogramming the flash. Method one is more expensive due to the hardware involved but the user program has no awareness of the interface and any program could be run on the HC12 and it doesn't tie up the CAN port. Also, you'll have to become an expert at BDM interfacing. Method two is less expensive but the user program will have to be aware of the monitor that is in place. For example, the vector table would be routed to RAM (like other monitor programs like Buffalo, Debug12?) The user program would create jumps in RAM to their vector table which also adds a small amount of delay. One of the CAN ports would likely be tied up by the monitor also. If you have an HC12 with more than one CAN port this probably isn't a problem. Steve Zanthic Technologies Inc. is located at www.zanthic.com Your Controller Area Networking Experts! Embedded micro-controllers and CAN interface devices sold here ----- Original Message ----- From: georgdetlef To: Sent: Thursday, November 07, 2002 3:13 AM Subject: [68HC12] CAN-Loader for Reprogramming the MC9S12DG128B FLASH Hi developer -(friends..), Reprogramming specialists! I am working heavily on CAN-Module with interfacing to 24V-I/O'S and the MC9S12DG128B. I want to "Reprogramming the MC9S12DG128B FLASH Memory" at the CAN-Bus. Does anyone know how this method or program-code? Thanks in advance, sorry for my poor english Jens Plambeck -------------------- ">http://docs.yahoo.com/info/terms/ |
