PIC PSP port bus contention

Started by darkknight in comp.arch.embedded12 years ago 6 replies

Hi We're trying to interface a PIC micro to an 8052 micro using the Parallel Slave Port on the PIC. The 8052 can read bytes written to...

Hi We're trying to interface a PIC micro to an 8052 micro using the Parallel Slave Port on the PIC. The 8052 can read bytes written to it by the PIC ok, but when the 8052 writes to the PIC, the PIC tends to read what it last wrote and not what the 8052 sent. The voltage levels on the data bus show contention with "half levels" when the PIC and 8052 are opposite states. Is there some...


MD5 for 8052 without stdlib, ...

Started by lordbyte in comp.arch.embedded11 years ago 7 replies

Hi! For an embedded project I have to implement the md5-algorithm on a 8052 CPU. First I thought it might be a more or less easy task, but...

Hi! For an embedded project I have to implement the md5-algorithm on a 8052 CPU. First I thought it might be a more or less easy task, but after looking a little deeper into the problem I got in touch with a few problems: - 8052 is only a 16 bit processor. Most md5 (reference) implementations are based on 32 biut - For my project I only have 32k of flash memory. If I use one of the ava...


8051/8052 hardware detection

Started by Anonymous in comp.arch.embedded12 years ago 6 replies

Hi. I am interested in how a program could detect if it is running on an 8052 compatible device, or just 8051. It should be reliable, i e if...

Hi. I am interested in how a program could detect if it is running on an 8052 compatible device, or just 8051. It should be reliable, i e if the device is not 8052 compatible, the test sihould not hang up the device. One idea I have, is to write to the idata space and read back. But then I need to know that NO 8051-non8052-compatible device has the extended, 256 bytes, internal memory. S...


8051/8052 Emulator

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

Please suggest good emulator for 8051/8052 which support ISP devices(Atmel AT89S series) Thanks Naimesh

Please suggest good emulator for 8051/8052 which support ISP devices(Atmel AT89S series) Thanks Naimesh


8052 HomePage going, going...

Started by Murray R. Van Luyn in comp.arch.embedded8 years ago 18 replies

A news bulletin concerning website changes has been freshly posted on my 8052 microcontroller HomePage...

A news bulletin concerning website changes has been freshly posted on my 8052 microcontroller HomePage at: http://members.iinet.net.au/~vanluynm/ Get around to taking a last look at the site in the next 1-month if you can, as it will comprehensively vanish at the end of that period. Regards, Murray R. Van Luyn.


Silican labs (Cygnal) or other 8052 + CANopen

Started by Jon S. in comp.arch.embedded14 years ago 2 replies

I would like to implent CANopen (DS301,DS401) on the cygal/Silicon labs devices. Anyone already went done the road ? Or intending to ? Maybe...

I would like to implent CANopen (DS301,DS401) on the cygal/Silicon labs devices. Anyone already went done the road ? Or intending to ? Maybe on an other 8052 device ? Any advice, suggestions, tips ? Stijn


frequency meter with 8052 ( 8051)

Started by zotdall in comp.arch.embedded12 years ago 11 replies

is there any body knows how i can build ''6-digit frequncy meter'' by using 8051 (or 8052).?

is there any body knows how i can build ''6-digit frequncy meter'' by using 8051 (or 8052).?


8052 emulator in C

Started by joolzg in comp.arch.embedded6 years ago 54 replies

Anybody got a simple 8052 emulator in C source, im trying to reverse engineer some code and would like to emulate/simulate the code to get a...

Anybody got a simple 8052 emulator in C source, im trying to reverse engineer some code and would like to emulate/simulate the code to get a better understanding as it looks like it was written in C and compiled by a very bad compiler joolz -- --------------------------------- --- -- - Posted with NewsLeecher v5.0 Beta 6 Web @ http://www.newsleecher.com/?usenet --------------...


connecting 8052 to adc and dac

Started by CAFxX in comp.arch.embedded14 years ago 14 replies

hi, i was wondering how to connect an adc and a dac to a 8025 (DS89C420). do i have to use the two UARTs or it's better to use the "raw" i/o...

hi, i was wondering how to connect an adc and a dac to a 8025 (DS89C420). do i have to use the two UARTs or it's better to use the "raw" i/o pins? what i'm trying to do is a sort of audio filter: the signal is converted in digital, read by the 8052 (where the fx are applied), and sent to the dac. moreover i'm using BB's PCM1802 as the ADC and PCM1744 as the DAC. the problem is these are all ...


What is the easiest, or best, program for at89c51rd ?

Started by somehow in comp.arch.embedded12 years ago 2 replies

I got some 89c51's from a canceled project at work. I'd like to learn about how to make a project myself. I've found BASCOM-51. I've found some...

I got some 89c51's from a canceled project at work. I'd like to learn about how to make a project myself. I've found BASCOM-51. I've found some LED projects. I'd like to start with BASIC programming, since I don't know C. Is there a windows based development system that I can learn on? I've heard of 8052-BASIC. Is there a way to put the 8052-BASIC in the AT89C51RD Flash? thank you -- ...


Looking for 4x4 keypad scan routine for 8052 family chip.

Started by Art K6KFH in comp.arch.embedded14 years ago 2 replies

Greetings, I'm looking for a basic 4x4 matrix keboard scan routine for the 8052 family of chips. I want to use one port with 1 nibble as...

Greetings, I'm looking for a basic 4x4 matrix keboard scan routine for the 8052 family of chips. I want to use one port with 1 nibble as outputs and the other as inputs and periodically scan for keypresses. I've done this many times in the past but it's waaaay past and there isn't much need to reinvent the wheel. If someone could point me to a source I'd appreciate it. I looked all over...


C Library for 8052 uController to Interface HD44780-based LCD

Started by Joel Heath in comp.arch.embedded13 years ago 4 replies

I'm working on a senior design project involving an 8052 microcontroller. We currently have a hardware setup from a previous semester's team...

I'm working on a senior design project involving an 8052 microcontroller. We currently have a hardware setup from a previous semester's team that has an HD44780-based 16x2 character LCD as the main means to displaying information to the user. The C library we have from the previous team does not compile with what we now have. I would appreciate any information anyone might have on where to fi...


PS/2 mouse interface with 8052 microcontroller

Started by Ab Sah in comp.arch.embedded13 years ago 5 replies

I am tring to interface PS/2 mouse (optical) with a 8052 (AT89S52) microcontroller. From what I get from the internet without adding any extra...

I am tring to interface PS/2 mouse (optical) with a 8052 (AT89S52) microcontroller. From what I get from the internet without adding any extra hardware I cannot interface the mouse directly with the UART (serial port) of the microcontroller (mouse has data and clock lines; uC has RXD, TXD). 1. Are baud rates defined for asynchronous serial communication? What are the common baud rates used ...


Cheapest source for 8052?

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

Who is making 8052s at the cheapest prices right now? Please state volume with any pricing you may have.

Who is making 8052s at the cheapest prices right now? Please state volume with any pricing you may have.


sine routines

Started by CAFxX in comp.arch.embedded14 years ago 31 replies

does anybody know where to find some FAST sine routines to be run on an 8052? sdcc's math.h is just an empty file... just an #error directive!...

does anybody know where to find some FAST sine routines to be run on an 8052? sdcc's math.h is just an empty file... just an #error directive! thank you in advance.


ST semi RTC M41T94

Started by Martin Griffith in comp.arch.embedded9 years ago 12 replies

I'm waiting for a couple of M41T94 real time clock chips to arrive, so I'm scribbling some 8052 C code in advance. It's an SPI ic. Any gotchas...

I'm waiting for a couple of M41T94 real time clock chips to arrive, so I'm scribbling some 8052 C code in advance. It's an SPI ic. Any gotchas on this RTC? Thanks martin


LPC or SAM7?

Started by Anthony Fremont in comp.arch.embedded10 years ago 20 replies

Does it even matter? I've been doing the smaller micros (PIC, 8052, etc) in assembler for quite a while now, and I'd like to tinker with some...

Does it even matter? I've been doing the smaller micros (PIC, 8052, etc) in assembler for quite a while now, and I'd like to tinker with some ARM type stuff using C (gcc will be fine). I want to be able to use TCP/IP on the board. Looks like Olimex makes some pretty decent looking dev boards for cheap, but I don't know if I should lean towards the LPC line or the SAM7. What say ye? ...


converting float to ascii w/o printf

Started by Ron Blancarte in comp.arch.embedded11 years ago 35 replies

Now, i have googled this some, with not much as far as results, so I though I would ask here to see what kind of luck I would have. I am using...

Now, i have googled this some, with not much as far as results, so I though I would ask here to see what kind of luck I would have. I am using the Analog Devices ADuC831 (8052 ISA) part to do data acquisition and transmission. I have some data that is being held as floating point (single precision IEEE 754 format). Some of this data needs to be outputted to serial on request. This is whe...


ARM Development Kit Suggestions

Started by Dave Boland in comp.arch.embedded8 years ago 6 replies

I'm near the end of a project and would like to learn more about ARM processors for embedded use. I have experience with 8052, 386, HC11, and...

I'm near the end of a project and would like to learn more about ARM processors for embedded use. I have experience with 8052, 386, HC11, and 6800 derivatives, but nothing with the ARM. Since this is a learning exercise (for now), the requirements are minimal: * Documentation: complete and reasonable well done. * Form factor: don't much care, but easy interface with peripherials nice. ...


Generate DTMF

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

I used a 8052 MCU (24MHz crystal) and a 8 bits R-2R DAC to generate DTMF tones.The sampling frequency is 5kHz. The output is then input to a 2nd...

I used a 8052 MCU (24MHz crystal) and a 8 bits R-2R DAC to generate DTMF tones.The sampling frequency is 5kHz. The output is then input to a 2nd order LP filter. The telephone line seems to not recognize my tone. Is the order of filter enough or not? Thanks!