Good Free Bootloader for ATMEGA162 AVR?

Started by Al Borowski in comp.arch.embedded14 years ago 1 reply

Hi all, I'm after a bootloader to install on an ATMEGA162. Ideally it should be royalty-free and build with free tools. I don't really need...

Hi all, I'm after a bootloader to install on an ATMEGA162. Ideally it should be royalty-free and build with free tools. I don't really need encryption. The loader should accept new firmware via RS232. Does anyone have any recommendations? Thanks! Al


Capturing Audio

Started by Anonymous in comp.arch.embedded15 years ago 6 replies

Can anyone recommend a chip that I can use to capture simple audio (44 Khz, 16-bit one channel for example). This is for a hobby project where...

Can anyone recommend a chip that I can use to capture simple audio (44 Khz, 16-bit one channel for example). This is for a hobby project where I would like to sample audio from a microphone and send it to a PC through either USB or RS232. I'm a complete newbie and I'm not sure where to start. Maybe someone can point me to an existing project or a magazine article that describes such a th...


RJ45 case

Started by sjon...@scannex.co.uk in comp.arch.embedded11 years ago 3 replies

I have put together a little RS232 booster which uses RJ45 connectors (line powered), around 70 are required, so I am looking for a little box...

I have put together a little RS232 booster which uses RJ45 connectors (line powered), around 70 are required, so I am looking for a little box with RJ45 cutouts at each end. Around 50mm by 30mm. I don't mind pulling apart somebody elses product but so far have not found anything appropriate. Just wondered if anybody had any ideas. The case should cost no more that =A32 ($4). Thanks


Serial (rs232 etc.) to IP

Started by Anonymous in comp.arch.embedded14 years ago 36 replies

Hi, Could anyone lend some light into which protocol or technique is used to actually send I/O from a legacy serial port device onto a...

Hi, Could anyone lend some light into which protocol or technique is used to actually send I/O from a legacy serial port device onto a TCP/IP network? I see there are many products out there, but none of the product sites describe the actual protocol used on the IP network side. An RFC search also came up with nothing, though I could have missed it as well... I know that on the client s...


tms470

Started by Don in comp.arch.embedded13 years ago 1 reply

Hi, I am currently attempting to use the DMA channels in the TMS470 (arm7dtmi core product from TI). I can't seem to get it working quite...

Hi, I am currently attempting to use the DMA channels in the TMS470 (arm7dtmi core product from TI). I can't seem to get it working quite right. Here is what I'm trying to do. 1. Set up a simple array of chars 'a', 'b' through 'e' 2. Write these chars to the SCI port (RS232) via a memory-peripheral over DMA. 3. So far I've had limited success, 1 character seems to work, but when I ...


Smallest embedded HW to run Linux

Started by Ben Scott in comp.arch.embedded14 years ago 4 replies

What is the smallest (in size, not in computational power or memory) embedded hardware (CPU+USB Host+RS232+RAM+Ethernet+Parallel IO+Optional...

What is the smallest (in size, not in computational power or memory) embedded hardware (CPU+USB Host+RS232+RAM+Ethernet+Parallel IO+Optional IDE/ATA) capable of running Linux (preferably kernel 2.6) ?


a/d convertor

Started by Anonymous in comp.arch.embedded13 years ago 2 replies

Does anyone know of any low cost a/d converters than are easy to interface via SPI, rs232. The performance requirements are the following 1. 8...

Does anyone know of any low cost a/d converters than are easy to interface via SPI, rs232. The performance requirements are the following 1. 8 bit resolution, min, more if not scalable inputs. 2. Sample and hold input preferably with scaling. 3. input voltages from + - 1 volts. 4. conversion rate of


8-bit board with VGA?

Started by karel in comp.arch.embedded15 years ago 7 replies

apologies if this question has been asked before... this newbie is looking for a board with an 8-bit CPU (an 6808/6811/6812 best of all) with a...

apologies if this question has been asked before... this newbie is looking for a board with an 8-bit CPU (an 6808/6811/6812 best of all) with a VGA output either on board or piggyback and besides, some or all of the common interfaces I?C - CAN - USB - RS232 - ... TIA Karel from the low countries


nonintrusive signal sniffing

Started by Oscar in comp.arch.embedded14 years ago 8 replies

I'm interested in experimenting with how to non intrusively sniff signals on a wire. Examples are phone lines, VGA video, NTSC video, RS232,...

I'm interested in experimenting with how to non intrusively sniff signals on a wire. Examples are phone lines, VGA video, NTSC video, RS232, etc. One of the first I'd like to try is NTSC video on a standard RG-59 coax. Is there enough radiation from these to detect anything useful if you can get in close ? Or does the coaxial cable effect attenuate it so much that its not feasible ? As...


Error Free Protocol

Started by Jojo in comp.arch.embedded15 years ago 4 replies

Hi NG, I need a good protocol for error free communicating with my msp and a pc. It should be a software protocol (not RS232 with parity)...

Hi NG, I need a good protocol for error free communicating with my msp and a pc. It should be a software protocol (not RS232 with parity) because it should work on other links such as over gsm, too. What about xmodem. Can I use this protocol for communication, too? Can somebody help please? Thanks, Joachim


How to test RS485 in loopback?

Started by kaczfan in comp.arch.embedded13 years ago 4 replies

Hi. When I want to test RS232, I simply cross Tx and Rx pins (2 and 3 in DB9). In RS485, on the other hand, there are four pins used for...

Hi. When I want to test RS232, I simply cross Tx and Rx pins (2 and 3 in DB9). In RS485, on the other hand, there are four pins used for transmission, ie Tx+, Tx-, Rx+, Rx-. Is it enough to connect Rx+ to Tx+ and Rx- to Tx-, or is there any connection that should also be done? What are the possible reasons for the lack of transmission?


Programming to USB / RS232

Started by JSZ in comp.arch.embedded12 years ago 1 reply

Group - I know its a little bit off topic, but I am not sure where else to turn: I am looking for suggestions for development organizations...

Group - I know its a little bit off topic, but I am not sure where else to turn: I am looking for suggestions for development organizations that can help write middle layer / driver logic that can receive web service like requests and translate these requests into simple commands that can be sent to an external device via a USB and/or serial port. The ideal organization will have the fol...


Fast uC with CAN

Started by Dave Williams in comp.arch.embedded15 years ago 6 replies

Hi, I am looking for a uC for my application: a CAN to RS232 interface. Most important spec is that it must not miss any messages...

Hi, I am looking for a uC for my application: a CAN to RS232 interface. Most important spec is that it must not miss any messages when arriving at maximum possible rate (1MBps). I need to store a lookup table in flash memory, table ~17K plus my code. The table can be written many times (possibly thousands) over the life of the product. I would prefer an integrated uC so that interface is a...


GSM based remote telemetry system

Started by Chans in comp.arch.embedded13 years ago 6 replies

Hi, I am working in a process controlling insruments manufacturing company where we are devoloping a project to control a remote device using...

Hi, I am working in a process controlling insruments manufacturing company where we are devoloping a project to control a remote device using a GSM controller. I wish to know whether is there any subscriber service available for such applications. I'm in India. State-TN. Also, let me know if you have any information on availability of standard GSM modules with RS232 interface. Right now w...


debug u-boot using BDI2000

Started by SuperMario in comp.arch.embedded13 years ago 5 replies

Hello all I am making a RS232 - datalogger for my MasterThesis in the university. My environment is BDI2000 debugger GNU...

Hello all I am making a RS232 - datalogger for my MasterThesis in the university. My environment is BDI2000 debugger GNU toolchain AT91RM9200 The work is simply to take input signals from the USART port and send it to the SD card. Can anyone please answer the following quesitons ? 1. I have u-boot running on my board. Is there a way to achieve my goal by just using the u-boot. I am...


LPC2106 JTAG Programming Confusion!!

Started by amerdsp in comp.arch.embedded12 years ago 1 reply

Greetings, I am reading mixed information about the ability to program the 2106 using a parallel port wiggler. Some say that it is only...

Greetings, I am reading mixed information about the ability to program the 2106 using a parallel port wiggler. Some say that it is only possible to program the device via RS232 but others say that it is possible to do the JTAG programming. What am I missing? What do I need to have to be able to use JTAG for programming the chip if possible? Thank you, -- A


RS485 with +-15V common mode

Started by Ralph Malph in comp.arch.embedded15 years ago 10 replies

Boy, I thought it was tough finding an I2C port expander chip that fit all my requirements. I am looking for an RS485 tranceiver that I can use...

Boy, I thought it was tough finding an I2C port expander chip that fit all my requirements. I am looking for an RS485 tranceiver that I can use along with an RS232 chip to allow either protocol through the same pins. But I can't find an acceptable chip anywhere. This was discussed a few weeks ago, but I don't think anyone mentioned any part numbers that were compatible. I think I can f...


Remote Monitoring of embedded devices

Started by Mike V. in comp.arch.embedded15 years ago 6 replies

I have an application where I there may be several automatic pedestrian doors (the sliding and swinging doors you see in airports, supermarkets,...

I have an application where I there may be several automatic pedestrian doors (the sliding and swinging doors you see in airports, supermarkets, department stores, etc.). Each installation shall be able to communicate to some gateway/logger/concentrator/router, whatever you call it, whether it be via CAN, RS232, and one day, even wireless, to the gateway. This gateway then will communicate...


Real Time Clock Code (RTC) for PIC family

Started by tomcee in comp.arch.embedded9 years ago 51 replies

Hello: What is the latest RTC code anyone could recommend for the PIC (16f) family? My requirements are simplicity and low power, with LCD...

Hello: What is the latest RTC code anyone could recommend for the PIC (16f) family? My requirements are simplicity and low power, with LCD display and perhaps RS232 interface. Is the Microchip AN582 as good as it gets? Thanks, TomC


UART interfacing pc and pic problem

Started by zheng in comp.arch.embedded11 years ago 3 replies

Hi all, I am using dspic30f6010a interfacing pc with rs232. when I use hyperterminal, I can only receive something like <

Hi all, I am using dspic30f6010a interfacing pc with rs232. when I use hyperterminal, I can only receive something like <