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Need low-cost

Started by CBodd in comp.arch.embedded18 years ago 18 replies

Hi, Hoping I can benefit from the collective wisdom of the folks on this newsgroup. What I am looking for is a simple UART / serial / RS-232...

Hi, Hoping I can benefit from the collective wisdom of the folks on this newsgroup. What I am looking for is a simple UART / serial / RS-232 interface (I know those terms aren't interchangeable), with minimum cost being the goal. The product sales will be in the 50k unit range annually, and the selling price won't be very high at all a few 10s of dollars, if not cheaper. The difference b...


UART speed problem

Started by Jack in comp.arch.embedded14 years ago 11 replies

Hi, I need an opinion: a customer wish to comunicate with our board (that uses a Freescale MC56F8037 to control a BLDC motor with hall sensor...

Hi, I need an opinion: a customer wish to comunicate with our board (that uses a Freescale MC56F8037 to control a BLDC motor with hall sensor for commutations and an encoder for position sensing) via a RS485 bus with a baudrate of 230400 bps. the frames are 16byte in length and a reply is expected within 3 msec (communication should be every 80 msec). I'm not sure that the 8037 can hand...


Need a SD (memory card) controller chip.

Started by Boki in comp.arch.embedded17 years ago 16 replies

Hi All, I need a SD memory card controller chip, I also need to porting some MCU code, and need UART interface, low speed as 9.6K is...

Hi All, I need a SD memory card controller chip, I also need to porting some MCU code, and need UART interface, low speed as 9.6K is enough. Best regards, Boki.


Microcontroller USB interface chip

Started by mach7 in comp.arch.embedded16 years ago 16 replies

I know very little about USB, so excuse the naive question. I'm looking for an IC that I can interface with a microcontroller (in my case, the...

I know very little about USB, so excuse the naive question. I'm looking for an IC that I can interface with a microcontroller (in my case, the ATMega32) that will let me communicate with a computer over USB. My project involves large data transfers (for logging purposes) and serial / UART is too slow. Any direction would be helpful. Thanks, -J


Simple & small MCU with 4 UARTS

Started by eliben in comp.arch.embedded15 years ago 23 replies

Hello, This question comes up from time to time, and I want to see if there's anything new in the offerings. I need an MCU with 4 UART (@...

Hello, This question comes up from time to time, and I want to see if there's anything new in the offerings. I need an MCU with 4 UART (@ 38.4 KBaud each) and several IOs. The 4 UARTs is a problem, because the simplest MCUs (PIC, AVR) don't have chips with this amount (AFAIK). I've seen various suggestions: 1) Use a different MCU (Renesas, Freescale), etc. I'm reluctant to do it, b...


debugger for AT89LP214

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

I'm considering using the Atmel LP214 to act as a translator between legacy hardware and a new imager (camera) chip. It's 14pin, has enough...

I'm considering using the Atmel LP214 to act as a translator between legacy hardware and a new imager (camera) chip. It's 14pin, has enough Flash and RAM, and has the UART and counter to make life easy, but I'm a little unclear on how one debugs code on a part like this. I'm not interested in going back to the compile-burn-run puzzle or dropping breadcrumbs (printf-style "begin Main()")...


16C752 Problem

Started by rom in comp.arch.embedded15 years ago 10 replies

hello! i have a problem with the 16C752 double uart: when i try to send a character by writing it directly into the THR, a different...

hello! i have a problem with the 16C752 double uart: when i try to send a character by writing it directly into the THR, a different character (nearly always the same wrong character) gets sent. f.e. '10100101' instead of '00110000' has anybody an idea? additional info: - fifo is disabled - both uarts have the same behaviour - receiving data works fine!!! greets rom


UART interfacing pc and pic problem

Started by zheng in comp.arch.embedded15 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 <


Microcontroller communication

Started by ahme...@gmail.com in comp.arch.embedded18 years ago 2 replies

I want a microcontroller (Atmega48) to send a network packet to a computer NIC. What do i need to do to achieve this. The microcontroller will...

I want a microcontroller (Atmega48) to send a network packet to a computer NIC. What do i need to do to achieve this. The microcontroller will send a simple 144 byte packet and thats it. I just want to know how the computer can receive this properly. Do i do it through the microcontrollers UART? Or?


Clock Divider in a 22V10

Started by sam in comp.arch.embedded19 years ago 17 replies

Hello all: I have a 6.144Mhz crystal and I am trying to generate the 9600*16 ~ 154k clock needed by the 8251 UART and the ~ 1Mhz system...

Hello all: I have a 6.144Mhz crystal and I am trying to generate the 9600*16 ~ 154k clock needed by the 8251 UART and the ~ 1Mhz system clock. I dont want to use the 74ls* series ripple counters and I have a bunch of 22v10 PAL chips lying around. I have been thinking about how best to do this, using what I have. Basically I need to divide the 6.144Mhz by 40. First by 5 to real...


what can i do with those gpio ?

Started by RusH in comp.arch.embedded19 years ago 9 replies

I'v got a mips SoC running Linux kernel, 16(maybe 32 if i sacrifice some memory) GPIO pins sitting bored (16 can initiate interrupt). There is...

I'v got a mips SoC running Linux kernel, 16(maybe 32 if i sacrifice some memory) GPIO pins sitting bored (16 can initiate interrupt). There is also UART port (22MHz clock = very fast, 40ns cycles). I'm evaluating my options about using them : -IDE/CF interface -SD/MMC interfase ? -Camera -LPT (printserver) -USB host controller ? -... ? I would love to see such a project with a sam...


USART interrupt on transmission

Started by pozz in comp.arch.embedded2 years ago 4 replies

The UART/USART peripheral usually available in many microcontrollers triggers a few interrupts. Two of them are DRE (data register empty, as...

The UART/USART peripheral usually available in many microcontrollers triggers a few interrupts. Two of them are DRE (data register empty, as named in AVR documentation) and TXC (transmitter complete). The first can be used to feed the TX FIFO even during shifting out the last pushed data. Documentation usually lacks details on these interrupts, for example exactly WHEN they are trigg...


Looking For The Best Classroom Course(s) To Learn Software Embedded Engineering? [closed]

Started by Anonymous in comp.arch.embedded4 years ago 2 replies

What are the best courses to learn Embedded Engineering? I'm a good programmer in just about any computer language you can mention. But for...

What are the best courses to learn Embedded Engineering? I'm a good programmer in just about any computer language you can mention. But for example, I don't know how to use the multitude of protocols to talk to the various types of hardware. Some easy examples of these protocols are the 1553 bus and UART. There are many more that I could list. I'm looking for a well-rounded course or cour...


Hardware muldiplier/divider for PIC16C57 on FPGA, but how do I program it?

Started by Kelv...@ SG in comp.arch.embedded20 years ago 4 replies

Hi, there: I am doing some exercise with a PIC15C57 core on FPGA. Now I am adding a multiplier to address 7C~7F...Basically in assembly I...

Hi, there: I am doing some exercise with a PIC15C57 core on FPGA. Now I am adding a multiplier to address 7C~7F...Basically in assembly I will write two variables to 7C & 7D, then fetch the result from 7E & 7F...Similar idea to a divider...Will such a crazy idea find application in the real world? Plus...I can add stuff like UART, DDS, etc... Kelvin


Extending UART queue capacity in software

Started by Anonymous in comp.arch.embedded10 years ago 3 replies

I'm not sure this question is meaningful without a lot of extra data, but here goes anyway: I have an application running on an older device...

I'm not sure this question is meaningful without a lot of extra data, but here goes anyway: I have an application running on an older device with unbuffered UARTs, and am porting to a newer device with 16550 compatible UARTs. There is a requirement to minimise program overhead for the data transfer in and out, and the buffering requirements are well in excess of 16 both ways - the existing...


What are the best courses to learn Embedded Engineering?

Started by Mike091 in comp.arch.embedded4 years ago

I'm a good programmer in just about any computer language you can mention. But for example, I don't know how to use the multitude of protocols to...

I'm a good programmer in just about any computer language you can mention. But for example, I don't know how to use the multitude of protocols to talk to the various types of hardware. Some easy examples of these protocols are the 1553 bus and UART. There are many more that I could list. I'm looking for a well-rounded course or courses to learn Embedded Programming. What should I learn? What...


AVR library for LCD and 1wire?

Started by Roland Zitzke in comp.arch.embedded19 years ago 11 replies

Hi, I am looking for a library written in GNU C for the AVR which supports HD44780 LCDs in 8-bit port mode, 1wire (Dallas) and UART. The...

Hi, I am looking for a library written in GNU C for the AVR which supports HD44780 LCDs in 8-bit port mode, 1wire (Dallas) and UART. The library will be used in a commercial project and should therefore be LGPLed or simmilar license. I am sure I remember there were several good implementations available from www.avrfreaks.net but this site appears to be down. Any hints? Thanks and re...


EDK =>"Virtex4_PPC_Example_9_1" on ubuntu, not able to change LEDs blinking through minicom hyperterminal

Started by N.V. Chandramouli in comp.arch.embedded17 years ago

hi, we are trying to run the "Virtex4_PPC_Example_9_1" example program (that came along with the EDK9.1.2 kit) that has TestInterrupt.c routine...

hi, we are trying to run the "Virtex4_PPC_Example_9_1" example program (that came along with the EDK9.1.2 kit) that has TestInterrupt.c routine (timer interrupt driving the LEDs and UART interface displaying the status.) "We are able to see LEDs flashing on the board but not able to speed up or slow down the clock using the 'f' , 's' inputs through the hyperterminal, which we are expecte...


How to write a software description document?

Started by Anonymous in comp.arch.embedded9 years ago 11 replies

I have written software for an embedded system. All commands are received by UART. Now I must create a document that describes the software and...

I have written software for an embedded system. All commands are received by UART. Now I must create a document that describes the software and how it works together with the hardware on that circuit board. Someone else should feel comfortable reading this and start to make future modifications to the software. How do I get a good structure in that document? Where to begin? I figure


Multidrop bus on Windows

Started by pozz in comp.arch.embedded4 years ago 39 replies

I often work on embedded firmware for MCUs connected by a multidrop master/slave RS485 bus. Moreover I try to compile the same code with...

I often work on embedded firmware for MCUs connected by a multidrop master/slave RS485 bus. Moreover I try to compile the same code with mingw compiler, simulating the hw. Of course, I simulate the serial bus connection (UART) by using a COM port on Windows. This allows me to speed-up testing, debugging and so on. So I can launch many simulators of the same device or different devices...



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