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PIC PSP port bus contention
darkknight - 2005-11-21 02:45:00
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...
Looking for 4x4 keypad scan routine for 8052 family chip.
Started by Art K6KFH 9 years ago
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 ...8051/8052 hardware detection
Started by Unknown 7 years ago
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 ...8051/8052 Emulator
Started by Naimesh 9 years ago
Please suggest good emulator for 8051/8052 which support ISP
devices(Atmel AT89S series)
Thanks
Naimesh
...8052 HomePage going, going...
Murray R. Van Luyn - 2009-12-13 09:57:00
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.
Reg...Silican labs (Cygnal) or other 8052 + CANopen
Started by Jon S. 9 years ago
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
...MD5 for 8052 without stdlib, ...
lordbyte - 2006-10-31 09:46:00
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) implementatio...frequency meter with 8052 ( 8051)
zotdall - 2005-12-11 11:18:00
is there any body knows how i can build ''6-digit frequncy meter'' by
using 8051 (or 8052).?
...8052 emulator in C
joolzg - 2011-05-24 04:11:00
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
--
--------------------------------- ---...connecting 8052 to adc and dac
Started by CAFxX 9 years ago
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 ...What is the easiest, or best, program for at89c51rd ?
somehow - 2006-01-28 12:07:00
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 h...C Library for 8052 uController to Interface HD44780-based LCD
Started by Joel Heath 9 years ago
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...PS/2 mouse interface with 8052 microcontroller
Started by Ab Sah 8 years ago
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....Cheapest source for 8052?
Prescott - 2007-02-13 00:32:00
Who is making 8052s at the cheapest prices right now?
Please state volume with any pricing you may have.
...sine routines
Started by CAFxX 9 years ago
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
Martin Griffith - 2008-09-08 10:19:00
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?
Anthony Fremont - 2007-07-31 09:08:00
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 board...Generate DTMF
cell - 2008-04-28 22:23:00
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!
...SPI controlled registers in peripheral chips question.
Martin Griffith - 2008-02-29 11:32:00
Just been handed a possible job that requires a encoder IC to be set
up via SPI, about 20 r/w 8 bit registers. I'm going to use a 8052
with a 2 line LCD that's memory mapped, just because I have a couple
of boards lying around
I'll add a few buttons, but I was wondering if there is any neat...CAN J1939 Help
Neil - 2006-01-28 00:55:00
Hi
I will be doing a J1939 project soon.
I need to :
1.pick a micro.
2.write or buy the stack.
3.figure out which doc I need to Buy from SAE.
4.Maybe get a Book?
On the micro I found
PICs
8052s
AVRs
Ulf tell me why I should go with Atmel (really!!) Does Atmel have any
appnotes ...Extra addr. lines needed
Started by John Tan 9 years ago
Hi,
I'm using an 8052 that has 12 addr lines ~ 4KB of addressable space.
But i need to access additional 512KB of ROM ~ 19 address lines
required!
How do i extend the addr. to 19 lines.
Can i do this:
1) get firmware engineer to extend it using GPIO pins ? Is this a good
method ?
2) so...signature failure with AT89S52 on micromaster
darkknight - 2005-11-14 02:17:00
Hi
I've been trying to program an AT89S52 PLC44 flash chip (8052) using an
IceTech Micromaster LV48 programmer and it won't accept the signature of
the device. It gives an error message suggesting several possibilities
- including "Secure".
I can read an OTP device ok and its...zero out bitvars area in cstartup
Started by Beach 8 years ago
Hi there,
I'm trying to zero out the bitvars area in a 8052 cpu in the 'cstartup'
file.
My compiler (IAR) has two "assembler operators" SFB(..) and SFE(..)
that gives me the start and end of the "bit addresses" that needs to be
cleared.
MOV R0,#SFB(BITVARS)
SJM...ARM Development Kit Suggestions
Dave Boland - 2010-03-12 15:48:00
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 an...Free FAT16 Filesystem
Started by Murray R. Van Luyn 8 years ago
The FAT16/ 8051 Re-Work of Dave Dunfield's Minimal Dos Compatible File
System (MDCFS) for the Keil C compiler is now complete and is available for
download at www.iinet.net.au/~vanluynm
Situated over the Compact Flash sector level hardware and routines (also
available from the link above), or ...converting float to ascii w/o printf
Ron Blancarte - 2007-03-27 16:45:00
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 prec...