EEPROM Jumper question for M68EVB912B32

Started by mgrace_canlas in 68HC1215 years ago 1 reply

Hello, me again. I have a question regarding the M68EVB912B32 evaluation board. In the EVB user's manual, it stated in...

Hello, me again. I have a question regarding the M68EVB912B32 evaluation board. In the EVB user's manual, it stated in Jump-EEPROM Mode, "..(W3-1 and W4-0), the EVB begins operation out of reset by executing the user program in byte-erasable EEPROM starting at a


RAM location with Cosmic Idea

Started by Graham Tricker in 68HC1214 years ago 1 reply

Hi I am investigating how to create a generic eeprom driver for the HC9S12DP256 with Cosmic Idea. I want to create a RAM copy...

Hi I am investigating how to create a generic eeprom driver for the HC9S12DP256 with Cosmic Idea. I want to create a RAM copy off eeprom which has it's own section in the linker file i.e. 3k RAM associated with eeprom. This works fine, my problem is I want to keep my source in


S12E128 EEPROM emulation code

Started by Bruce McMillan in 68HC1214 years ago 3 replies

List mates, As a follow up to discussions on this list re E128 and it's lack of EEPROM, I've uploaded code code to provide 1KB of...

List mates, As a follow up to discussions on this list re E128 and it's lack of EEPROM, I've uploaded code code to provide 1KB of EEPROM emulation. File is: E128_EEPROM_EMULATION.ASM Code is derived from the original Serial Uploader written by Gordon. Brief description f


Problem with 9S12C32 SPI input

Started by Maria A. Lobo in 68HC1213 years ago 1 reply

Hello all , We are having a problem with SPI read from an external EEPROM We are using the SPI in polling mode . What is...

Hello all , We are having a problem with SPI read from an external EEPROM We are using the SPI in polling mode . What is needed is a write to EEPROM at a single address . and then at some other point read back the data from that address. The EEPROM used is AT 25160A . What happens here is that the write is successful an


run-time programming of EEPROM in DP256

Started by danielkolodka2002 in 68HC1212 years ago 6 replies

Hello dear people, actually we are trying to program, using a run-time routine, the EEPROM of the MCU: HCS912DP256, but we could not do it...

Hello dear people, actually we are trying to program, using a run-time routine, the EEPROM of the MCU: HCS912DP256, but we could not do it yet. We modify and traslate to C, the assembler routine used for Erase de EEPROM in the bootloader code, of course we change the code to command the internal FSM, that automatically erase and program this memory. The result is always the same, every t...


9S12D64 and P&E Micro's Cyclone Pro

Started by Wade A Smith in 68HC1212 years ago 2 replies

Any one out there know more than the pathetic PEMicro's documentation says? We have not been able to find any way to program EEPROM on the...

Any one out there know more than the pathetic PEMicro's documentation says? We have not been able to find any way to program EEPROM on the 9S12D64 using the Cyclone Pro. In fact there is no mention in the documentation (nor examples) on "How To" work with EEPROM. Our program depends heavily on values in EEPROM to start and run. But we havent even been able to get the Cyclone Pro to recog...


How to tell Code Warrior debugger NOT to erase EEPROM

Started by apedroso11 in 68HC1212 years ago 2 replies

Hi all, I want the CodeWarrior debugger to NOT erase the EEPROM everytime I download user code to my DP256 or everytime I want to use the...

Hi all, I want the CodeWarrior debugger to NOT erase the EEPROM everytime I download user code to my DP256 or everytime I want to use the BDM. I have tried to comment this debugger commands: //mass erase eeprom //wb 0x110 CLKDIV // set ECLKDV clock divider //wb 0x114 0xFF // EPROT all protection disabled //wb 0x115 0x30 // clear PVIOL and ACCERR in ESTAT register //ww 0x118 0...


Eeprom r/w via CAN

Started by kinggsm in 68HC1214 years ago 3 replies

I need software for read/write eeprom via CAN-bus

I need software for read/write eeprom via CAN-bus


How many writes for HCS12 (PN:MC9S12DP256B) microprocessor EEPROM?

Started by mikehockstein in 68HC1210 years ago 2 replies

Hello everyone, I've been trying to find what the limited number of write cycles is for this EEPROM, but I can't seem to find it. If you...

Hello everyone, I've been trying to find what the limited number of write cycles is for this EEPROM, but I can't seem to find it. If you could help me out, it would be greatly appreciated. Let me know where you found your information too please.


EEPROM + interrupt +bootloader

Started by a2vutuan in 68HC1214 years ago

Hi, I'm using HC912B32 EVB, I need to program to use the IRQ interrupt. But I can't program the EEPROM to point the IRQ...

Hi, I'm using HC912B32 EVB, I need to program to use the IRQ interrupt. But I can't program the EEPROM to point the IRQ interrupt vector to my IRQ isr (in EVB mode). Is it that using bootloader to program the EEPROM is the only way I can do this. I've never tried with the


Writing to EEPROM

Started by wwsyip in 68HC1214 years ago 3 replies

Hi there, I'm trying to find a way to write a value and be able to retrieve after resetting the HC12. I have been told by the...

Hi there, I'm trying to find a way to write a value and be able to retrieve after resetting the HC12. I have been told by the technological arts people that this can be done using EEPROM. Does anyone know how to do it or have any source code? Thanks!


Banked EEPROM/RAM with 68HC12A4 & Codewarrior

Started by levijunkert in 68HC1213 years ago

Hardware/Software Preface: Currently we are using an Axiom CMD12-Rev A development board (HC12A4 with Expanded Wide Memory). This board has...

Hardware/Software Preface: Currently we are using an Axiom CMD12-Rev A development board (HC12A4 with Expanded Wide Memory). This board has 64K external EEPROM and 512k external RAM (we added in the RAM our selves). This memory runs in a 16bit wide data bus. That means that there are two chips for EEPROM (2x32k) and RAM (2x256k). We are using Metroworks Codewarri


DJ64 eeprom programming in low temperature

Started by jo_wan_soo in 68HC1211 years ago 9 replies

We are using HCS12 micro ( MCS12DJ64 CPV 2L86D mask set) in our automotive CAN application . Recently, we have discovered some problem...

We are using HCS12 micro ( MCS12DJ64 CPV 2L86D mask set) in our automotive CAN application . Recently, we have discovered some problem with eeprom programming in low temperature ( -20 degree Celsius ) environment. Our automotive application is programmed to write some datum to DJ64??s eeprom before turning the power off . The application runs fine in room temperature ( 10 ?V 20 deg...


Do Interrupt vectors & EEPROM overlap in normal, single chip mode?

Started by Anonymous in 68HC1214 years ago 3 replies

Hello, I am new to working on the 68HC12. I am going through some of the documentation provided by motorola on this controller...

Hello, I am new to working on the 68HC12. I am going through some of the documentation provided by motorola on this controller and I ran into a spot where in it was not clear if the interrupt vectors & the EEPROM overlap in normal, single chip mode? If the EEPROM and


EEPROM programming for 9S12A128

Started by Gianni in 68HC1215 years ago 5 replies

Hello, I would like to know if anyone has a "C" callable routine to program the EEPROM of a 9S12A128 device. I'm using ICC12...

Hello, I would like to know if anyone has a "C" callable routine to program the EEPROM of a 9S12A128 device. I'm using ICC12 compiler. Thank you very much.


EEPROM locked

Started by simon_defayette in 68HC1214 years ago 1 reply

Hi, I don't know how I did this, but I can't write in the first 1k (registers and EEPROM) of my HCS12. Anyone knows how to unlock...

Hi, I don't know how I did this, but I can't write in the first 1k (registers and EEPROM) of my HCS12. Anyone knows how to unlock that? I can't write in the EPROT register. I really don't know what to do. Thanks! Simon Defayette


Writing to EERRPM after flashing

Started by sunil1ind in 68HC1213 years ago 1 reply

We are using 68hcs12 processor. I am able to program the EEPROM locations using emulator. But after flashing using the same code...

We are using 68hcs12 processor. I am able to program the EEPROM locations using emulator. But after flashing using the same code i am not able to program eeprom. What could be the problem?


EEPROM Write question

Started by Tim Raabe in 68HC1214 years ago 2 replies

I've finally gotten my bootloader working, Thanks everyone! However, I'd like to enter it by writing a location in EEPROM that I ...

I've finally gotten my bootloader working, Thanks everyone! However, I'd like to enter it by writing a location in EEPROM that I can start up. I've read various app notes on how this is done, and wrote the following function: char EEPROM_WRITE(unsigned int addr


EEPROM mapping in Codewarrior

Started by Daniel Lundin in 68HC1214 years ago 5 replies

Using: Codewarrior 3.0 on HCS12DG128 How do I map the EEPROM with Codewarrior? The only way I know of is to set the INITEE...

Using: Codewarrior 3.0 on HCS12DG128 How do I map the EEPROM with Codewarrior? The only way I know of is to set the INITEE register manually. If I do that, everything will be fine except that the memory will then be erased at startup, which I don't want. I have wr


EEPROM mapping with Codewarrior

Started by Daniel Lundin in 68HC1214 years ago

Using: Codewarrior 3.0 on HCS12DG128 How do I map the EEPROM with Codewarrior? The only way I know of is to set the INITEE...

Using: Codewarrior 3.0 on HCS12DG128 How do I map the EEPROM with Codewarrior? The only way I know of is to set the INITEE register manually. If I do that, everything will be fine except that the memory will then be erased at startup, which I don't want. I have wr