24C04 with my microcontroller

Started by Aliasger in comp.arch.embedded16 years ago 4 replies

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


persistent storage in AT91SAM7S?

Started by orc in comp.arch.embedded15 years ago 1 reply

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


linear interpolation / Assembler / ATMega32

Started by Rolf Bredemeier in comp.arch.embedded15 years ago 17 replies

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...


Programmer for AT24C64

Started by James254 in comp.arch.embedded16 years ago 10 replies

Hi All, I support a product that's been manufactured with a bug in the flash memory of the microcontroller. The factory has come up with a...

Hi All, I support a product that's been manufactured with a bug in the flash memory of the microcontroller. The factory has come up with a solution and the design allows the update to be loaded via the products RS232 connector, so this part is simple. When the update is done I need to go into the adjustment menu and manually edit 116 different locations in the EEPROM according to a table...


FX2 and EEPROM

Started by runner in comp.arch.embedded13 years ago 3 replies

I have a commercial webcam based on EZUSB - FX2. I still want to use the camera, so i don't want to make any changes (like disconnecting...

I have a commercial webcam based on EZUSB - FX2. I still want to use the camera, so i don't want to make any changes (like disconnecting the seeprom). I hoped that using the vendor command A0 i could bypass the "C2" SEEPROM. I'm able to upload my code and have it running. It seems that after i take the cpu out of the reset i cannot disconnect and reconnect the device by "bmDISCON". That is, t...


Pic very basic C18 question

Started by Royston Vasey in comp.arch.embedded10 years ago 10 replies

I'm pushing along trying to learn some C using MCC18. Can someone please tell me what the "&" before the variable "variable" does or means in...

I'm pushing along trying to learn some C using MCC18. Can someone please tell me what the "&" before the variable "variable" does or means in the code below? I'm finding it hard to find basic info like this in the documentation I've found. Is it AND? AND with what? thanks ee_read_byte(0x00, &cal_var); //initialise calibration variable from eeprom why the "&" -----------...


Serial ROM

Started by Aliasger in comp.arch.embedded16 years ago 3 replies

Hi I want to integrate a serial ROM with my 89C52. I came across some really large program that has to be fed ito the EEPROM of the 89C52 for...

Hi I want to integrate a serial ROM with my 89C52. I came across some really large program that has to be fed ito the EEPROM of the 89C52 for it to be able to access the 2404. Is it simple to interface this chip with a microC and is it worth while. (I need to store some values after power down) Thanks Ali


Zilog Z8 Replacement?

Started by eeboy in comp.arch.embedded9 years ago 2 replies

I have a product that utilizes a Z86E40 in the PLCC package. It's an OTP part. It's getting progressively harder to find. I am running out of...

I have a product that utilizes a Z86E40 in the PLCC package. It's an OTP part. It's getting progressively harder to find. I am running out of the windowed DIPs which are used for development. I am curious if there is a pin compatible replacement part with EEPROM or FLASH memory. It would be ideal if it had the same instruction set but that's not necessary. -----------------------------...


SPI comunication

Started by allievo in comp.arch.embedded11 years ago 2 replies

Hello, I just received a Triboard for the Infineon TC1766 Tricore microcontroller. I am trying to setup the SPI comunication with the eeprom...

Hello, I just received a Triboard for the Infineon TC1766 Tricore microcontroller. I am trying to setup the SPI comunication with the eeprom on the board, however there are no examples on how to configure the micro. Would anyone know where I can get an example of SPI implementation for the Tricore?? I would appreciate annyy help!!!! Thanks!!


25LC1024 SEEPROM

Started by Gary Peek in comp.arch.embedded15 years ago 5 replies

So I was looking through the DigiKey catalog to see how large a serial EEPROM I could get, and found the Microchop 25LC1024, a 128K by 8. I try...

So I was looking through the DigiKey catalog to see how large a serial EEPROM I could get, and found the Microchop 25LC1024, a 128K by 8. I try to order one and was told "August". ??? Damn! So then I try the similar Atmel part, with no luck, then the 32K by 8 chip from both manufacturers too. So who is sucking up all these parts? Or has DigiKey just jumped the gun putting them in their ...


93C06 data corruption

Started by Arthur Richards in comp.arch.embedded16 years ago 7 replies

We have an 87c51 system which uses a 93C06 EEPROM to hold configuration data. The units operate 7/24 and on average lost their data every...

We have an 87c51 system which uses a 93C06 EEPROM to hold configuration data. The units operate 7/24 and on average lost their data every few months. Sometimes ( if not always ) they erase to 0ffh's. I cannot find anything wrong with the micro code. Has anyone experience hardware errors with these devices? Thanks, Arthur


RTL8019AS

Started by Matt in comp.arch.embedded12 years ago 4 replies

Hello, I have been working on getting my RTL8019AS based board to remember what MAC address I was giving it before I realized that...

Hello, I have been working on getting my RTL8019AS based board to remember what MAC address I was giving it before I realized that the 8019AS does not have internal PROM and I would be forced to use an external EEPROM just to store the MAC. I have been reading the RTL8019AS data sheet along with the corresponding 'software developer's guide' and I am a little confused on how to program...


Universal flash programmer

Started by jis in comp.arch.embedded13 years ago 8 replies

HI, is there anything like universal programmer where it is possible to program the Flash and EEPROM of different...

HI, is there anything like universal programmer where it is possible to program the Flash and EEPROM of different microcontrollers. reagards, jis


Recommended External ROM for AVR

Started by trungnl in comp.arch.embedded14 years ago 10 replies

I am doing a project with ATmega8515. But the MCU's internal Flash memor is not enough for the firmware and I need to add an external memory...

I am doing a project with ATmega8515. But the MCU's internal Flash memor is not enough for the firmware and I need to add an external memory chip. What is the recommended EEPROM should I use in this case ? Any help could be highly appreciated ! N.L.Trung This message was sent using the comp.arch.embedded web interface o www.EmbeddedRelated.com


How to manage serial numbers

Started by Anonymous in comp.arch.embedded6 years ago 43 replies

I don't know where to post this question, maybe here someone has faced the same problem in the past and could give me some good ideas. I...

I don't know where to post this question, maybe here someone has faced the same problem in the past and could give me some good ideas. I have to ship products with a different 32-bits serial number saved in a non-volatile memory (actually it's the internal EEPROM of AVR microcontrollers). Of course, I have to be sure to avoid two identical numbers in different devices. I was thinkin...


PIC 16F877A With IAR

Started by Timo in comp.arch.embedded15 years ago 1 reply

hi, Are there some good example projects for the IAR PIC micro 16/17 environment for I2C, LCD, simple I/O, EEprom access and...

hi, Are there some good example projects for the IAR PIC micro 16/17 environment for I2C, LCD, simple I/O, EEprom access and interrupt routines? I have source code from a C2C and a CCS but i don't find the right way to acces the same things with a IAR. Thx in Advance, Timothy


Where to learn embedded system basics for little or no money?

Started by Charlie King in comp.arch.embedded15 years ago 13 replies

I've been working on a project that involved testing a toy with a simple processor in it, that controlled how the toy reacted when the user did...

I've been working on a project that involved testing a toy with a simple processor in it, that controlled how the toy reacted when the user did things. All of which got me interested in how the thing works at a hardware level - something in which I have no experience at all. I would like to learn more. I have around me a Windows PC, a Linux PC, an EEPROM 'memory programmer', some basi...


AT91R40008 - I2C question.

Started by Johnny in comp.arch.embedded15 years ago 2 replies

I was looking at the Atmel AT91R40008 for a new design. However I realised it dosen't support I2C. Does anyone have a recommendation about...

I was looking at the Atmel AT91R40008 for a new design. However I realised it dosen't support I2C. Does anyone have a recommendation about how to interface a real time clock, and maybe a serial eeprom. Is an I2C bus master a sensible approach, perhaps from Philips? The main objectives are low cost and good availbility. regards, Johnny.


Where to rent logic analyzer near Toronto, Canada?

Started by Mel in comp.arch.embedded10 years ago 16 replies

I'm having trouble with an EEPROM and an LCD module hooked to an AT91SAM7S256. Software is using the at91lib TWI_* routines that came with an...

I'm having trouble with an EEPROM and an LCD module hooked to an AT91SAM7S256. Software is using the at91lib TWI_* routines that came with an evaluation kit. The program seems to be hanging up on incomplete I/O with the LCD module, but I don't know why. Analyzing the TWI (aka I2C) protocol would either nail the problem or assure me that there was nothing to see there. Where could I...


help me get started with Embedded devices using Am29C020 chip on an SBC

Started by heirbrande in comp.arch.embedded15 years ago 2 replies

Hi, I would like some places to start to get the easiest program programmed into an AM29C020 EEprom to boot a single board computer. I...

Hi, I would like some places to start to get the easiest program programmed into an AM29C020 EEprom to boot a single board computer. I imagine seeing DOS or Linux booting up to say "Hello, World". First I just want to see this thing boot to something else instead of the WinCE that it boots to. After that I can try to figure out how to program them myself with some other programs. ...