I've been in the embedded area for quite some time. I am currently running DSP/BIOS on a TI F2801. I am having trouble accessing an EEPROM over...

I've been in the embedded area for quite some time. I am currently running DSP/BIOS on a TI F2801. I am having trouble accessing an EEPROM over I2C. I saw a thread that mentioned a DSP/BIOS driver for I2C and was wondering if I could get the source to modify for my application. I need to be able to write and/or read n bytes to/from any address in the EEPROM. --------------...

Hi, I have a datalogger with an eeprom memory, and i want to upgrade it to a serial flash memory. the problem is that when the memory is full it...

Hi, I have a datalogger with an eeprom memory, and i want to upgrade it to a serial flash memory. the problem is that when the memory is full it will start writing at the begining of the memory, and thats ok with the eeprom, but with the flash i will have to erase the whole block, so that its not ok. the message that im writing its 16 Bytes Long. anyone can help me with that? Thank you! ...

Does anyone know how to get datasheet on this EEPROM die? Nothing show up on google or infineon. Perhaps datasheet for packaged version would...

Does anyone know how to get datasheet on this EEPROM die? Nothing show up on google or infineon. Perhaps datasheet for packaged version would help, or a different part number. Thanks. http://avnetexpress.avnet.com/store/em/EMController/Memory-Misc/Infineon-Technologies/SP00024564 9ZJ/_/R-8269916/A-8269916/An-0?action=part&catalogId=&langId=-1&storeId=500201

Hi all, I would like to understand how to design drivers in such a way that its non blocking? To be more specific,If suppose I have an...

Hi all, I would like to understand how to design drivers in such a way that its non blocking? To be more specific,If suppose I have an EEPROM device and two tasks are trying to write some data to the EEPROM device,generally what happens is,we will have a semaphore inside driver so that till one task completes using the device,the other task will be pending to complete the writing.Wha...

Right just started a little project using the 18f4550 for usb and wanted to save some data in the internal eeprom. Easy or so i thought, as i...

Right just started a little project using the 18f4550 for usb and wanted to save some data in the internal eeprom. Easy or so i thought, as i am using Hi-tech PRO 18 V9.63 PL3 i thought i would use th eeprom_read and eeprom_write commands. So to test i used MPLAB and put a message in the eeprom and checked my read routine, OK, and so as my checksum failed i tested the write routine and NOT...

What memory location should the beginning (lowest address) of flash EEPROM be ORG'ed for the PIC16F877A? Maybe this info is located in a F87x...

What memory location should the beginning (lowest address) of flash EEPROM be ORG'ed for the PIC16F877A? Maybe this info is located in a F87x data sheet or the mid-range ref. manual but I haven't found it. There are copious references to EEADR, EEDATA, etc., but no example of ORG-ing in an ASM file. Microchip seems to have hidden this vital info. very well. IIRC, I discovered this info....

I have to purchase a serial EEPROM/Flash memories programmer (SPI, I2C) that usually supports also many other devices (PIC,...), even if it's...

I have to purchase a serial EEPROM/Flash memories programmer (SPI, I2C) that usually supports also many other devices (PIC,...), even if it's not a must. I'd like to have also a SMD socket/adapter for SOIC8 or similar packages. I don't have time to self-made a board or adapter. Please, suggest a product with the best performance/price ratio. Thank you.

Hi, I am still using the LPC2138 ;). Now I have a problem with I2C. When I try to send some bytes to an EEPROM device, the following...

Hi, I am still using the LPC2138 ;). Now I have a problem with I2C. When I try to send some bytes to an EEPROM device, the following happens: - I2C start condition is made - interrupt is generated - I2C address is sent - EEPROM device gives an ACK And now nothing happens. If I look at the I2C bus state, the microcontroller accepted the ACK. However, no new interrupt is given due to ...

Many times I work on embedded projects where it is required to save some data in a non volatile way. Usualy I use external (to the main...

Many times I work on embedded projects where it is required to save some data in a non volatile way. Usualy I use external (to the main microcontroller) serial/parallel EEPROM or internal Flash memory (with a software layer for EEPROM emulation). However my goal isn't to discuss the hw alternatives, but the data format and strategy. I know there are many serialization data format (X...

I have some 24C16A to program. I have a working 24C16A to clone. What is a fast and cheap way to proceed? I need a software and an hardware...

I have some 24C16A to program. I have a working 24C16A to clone. What is a fast and cheap way to proceed? I need a software and an hardware interface (USB to IIC or RS232 to IIC). I have a PicKit2, but I'm not sure if they can be used to program IIC EEPROM. If yes, what is the software to use? I could write a simple firmware for an MCU with IIC that connects to a PC (via RS232 or...

But NOT using EZ-USB which I suspect is messing my programme up. Perhaps it does not allow for the extra memory in the FX2LP. I have written...

But NOT using EZ-USB which I suspect is messing my programme up. Perhaps it does not allow for the extra memory in the FX2LP. I have written code to download a program (in hex or iic format) to RAM or EEPROM, but that was when the FX2 was running vend-ax (or our software, which is derived from it). I just need to get a file handle and then use some library functionto send 0xA0 command...

I'm looking for a large serial EEPROM or FLASH chip that comes in a small package and uses a serial interface. I need something in the range of...

I'm looking for a large serial EEPROM or FLASH chip that comes in a small package and uses a serial interface. I need something in the range of 1024 kbit - 2048 kbit in an 8-SOIC or smaller package, and it needs to be as cheap as possible. :) So far I've only found I2C EEPROMs like the 24C512, but these only seem to go up to 512 kbit or 1024 kbit, and they also get very expensive when y...

Hi, I'm planning an application on an HCS12 protoboard, it uses a relatively small amount of code, but needs a 'significant' amount of...

Hi, I'm planning an application on an HCS12 protoboard, it uses a relatively small amount of code, but needs a 'significant' amount of nonvolatile storage for data. My HCS12 has nominally 64K of flash plus 1K of EEPROM. It appears that normally the flash is used for program storage, and the EEPROM for nonvolatile static data. 1K for data isn't near enough in my case, but the combined cod...

I have seen the Write cylce time of EEPROM is in 'ms' ie., around 10ms. Why this time is so high while the RAM write cycle time is with in ...

I have seen the Write cylce time of EEPROM is in 'ms' ie., around 10ms. Why this time is so high while the RAM write cycle time is with in a clock cycle. -Muthu

Hi all I have no idea regarding low level hardware. I should firgure out something about ALTERA ACEX. Question is like following. 1.Are...

Hi all I have no idea regarding low level hardware. I should firgure out something about ALTERA ACEX. Question is like following. 1.Are the FPGA configuration data and the firmware different? 2.How can I extract FPGA configuration data from ALTERA ACEX to my PC? 3.How can I extract firmware in EEPROM to my PC? P.S What I want to do finally is extrating data from FPGA and EEPROM and ...

Hello, We are facing a corrupt/missing data problem with FT245BM: If the "pull down on USB suspend" option is enabled in EEPROM,...

Hello, We are facing a corrupt/missing data problem with FT245BM: If the "pull down on USB suspend" option is enabled in EEPROM, on startup, we get 126 bytes of garbage followed by the first byte from host. Subsequent bytes come across fine. If the "pull down on USB suspend" option is NOT enabled in EEPROM, the first byte from host is never received. Subsequent bytes come across fine....

Hi Anyone had any experience with Simtek non-volatile RAM - the sort that writes all its data to (EEPROM?) in one hit when the supply falls...

Hi Anyone had any experience with Simtek non-volatile RAM - the sort that writes all its data to (EEPROM?) in one hit when the supply falls below a trigger level (type STK14CA8)? Cheers Geoff

hi anyone has a good site where i can find interfacing the serial EEPROM with my microcontroller? the hardware wiring is pretty simple,...

hi anyone has a good site where i can find interfacing the serial EEPROM with my microcontroller? the hardware wiring is pretty simple, but i'm also looking as to how the MC is going to access the 24C04 in terms of software. any suggestions? - A

Hi there, Is it possible to use a small portion of the Flash memory during runtime (no JTAG connected) as a persistent storage (instead of...

Hi there, Is it possible to use a small portion of the Flash memory during runtime (no JTAG connected) as a persistent storage (instead of using a eeprom). I know it is possible in the ARM from ST but what about the AT91SAM7S from Atmel? Thanks orc

Hi all, i`m searching an ASM-example for 2d lin. interpolation. (No need for floating point) In the EEPROM is stored an table, like...

Hi all, i`m searching an ASM-example for 2d lin. interpolation. (No need for floating point) In the EEPROM is stored an table, like so .eseg LTable: .db 0, 75 .db 40, 37 .db 60, 48 .db 80, 180 .db 100, 170 (The first byte in every .db line is the index, the second the value.) Now i need the interpolated value for an index 55. The calculation for that is not so diff...