Need a SD (memory card) controller chip.

Started by Boki in comp.arch.embedded12 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.embedded11 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.embedded10 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.embedded11 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.embedded10 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


ZNEO Z16F problems

Started by jandc in comp.arch.embedded10 years ago

Anybody currently working with the ZNEO yet? I've got some serious problems with the internal ADCs using an external VREF. The results are VERY...

Anybody currently working with the ZNEO yet? I've got some serious problems with the internal ADCs using an external VREF. The results are VERY unstable and unusable. I2C only works in PIO mode, the same for UART. It seems that the DMA is not realy working as it should. The Zilog support is currently remaining silent for more than 60 days. Anybody some experience with the ZNEO chips?? ...


UART interfacing pc and pic problem

Started by zheng in comp.arch.embedded10 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.embedded13 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.embedded14 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.embedded15 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...


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

Started by Kelv...@ SG in comp.arch.embedded15 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.embedded5 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...


AVR library for LCD and 1wire?

Started by Roland Zitzke in comp.arch.embedded14 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.embedded12 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.embedded4 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


Serial port not available

Started by sanalex in comp.arch.embedded10 years ago

Hi all, I'm trying to connect a GPRS modem (Siemens MC35) to my windows CE based device (platform smdk2443 Samsung). I have for UART...

Hi all, I'm trying to connect a GPRS modem (Siemens MC35) to my windows CE based device (platform smdk2443 Samsung). I have for UART possible ports: UART0 -> I'm trying to connect my GPRS modem on it UART1 -> Debug port UART2 -> not available UART3 -> I've also tried on this one the problems is that I follows all the steps to create a dial-up connection but when I execute it I obtai


baud rate autodetection on AVR 8-bit?

Started by Ivan Shmakov in comp.arch.embedded6 years ago 104 replies

BTW, is there an easy way to autodetect the baud rate while using an AVR UART? (Preferably something that works with ATmega8, given that...

BTW, is there an easy way to autodetect the baud rate while using an AVR UART? (Preferably something that works with ATmega8, given that those MCU's are such a cheap thing nowadays.) There're some ideas (and 8051 code) for that on [1], but I'd like to know if there could be any better techniques. TIA. [1] http://www.pjrc.com/tech/8051/autobaud.html PS. It seems that I'm sl...


New ARM7 development board with Atmel AT91SAM7X256

Started by David Fowler in comp.arch.embedded13 years ago 6 replies

Does anyone have information on the Make Controller Kit board? Is $150 a good price? According to www.uCHobby.com it has the new Atmel...

Does anyone have information on the Make Controller Kit board? Is $150 a good price? According to www.uCHobby.com it has the new Atmel AT91SAM7X256 with everything except the kitchen sink; 256K Flash, 64K SRAM, JTAG, Ethernet, CAN, USB, 3 UART, 10 A/D, 4 PWM, 2 SPI, Watch Dog Timer, POR and Brownout etc...


Recommendations for cheap 20 pin micro with serial port bootloader.

Started by Anonymous in comp.arch.embedded7 years ago 6 replies

Greetings Title says it all. My company is using PIC10's as local supervisors, but they are a pain in a number of ways that I don't wish to...

Greetings Title says it all. My company is using PIC10's as local supervisors, but they are a pain in a number of ways that I don't wish to discuss. We would like to know of micros that have UART bootloaders loaded at the factory so that the parts can be programmed in system from a serial port on the test computer. Requirements are simple: 8 bit ADC, a few timers for PWM. Cost is


Using 8051 UART to interface with MatLab

Started by b_ma...@pacific.edu in comp.arch.embedded13 years ago 1 reply

I have project for school where we are using the Cygnal 8051 mircocontroller to capture acceleration. My part of the project is to take the...

I have project for school where we are using the Cygnal 8051 mircocontroller to capture acceleration. My part of the project is to take the data stored in memory and use MatLab to produce graphs and such. My question is where do i get started... how can i directly interface the 8051 with Matlab.