How do you extract the info from an RF Rx module (like garage door opener) ?

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

Hi all, I've been experimenting with receiver circuits and I'm missing something. The LC receiver I have (one of Ming's) and the Microchip...

Hi all, I've been experimenting with receiver circuits and I'm missing something. The LC receiver I have (one of Ming's) and the Microchip (433.92 MHz, rfRXD0420) seem to have noise at the output when they're not receiving a signal. I see the signal (on a scope) when I press a button in the respectively transmitter. But if I have this signal apply to the input of a micro, it looks lik...


Network Interface solution

Started by Derek in comp.arch.embedded15 years ago 1 reply

I am looking for a microcontroller with the attributes listed below. It is for a network interface that will be interfacing with only...

I am looking for a microcontroller with the attributes listed below. It is for a network interface that will be interfacing with only one digital or analog I/O. It is desirable use a battery for powering the device. It will be sending the value of the I/O along with a date/time stamp. A few microchip solutions have been listed below, but I would be interested it there is a better solution...


DTMF with AT2051

Started by Allen in comp.arch.embedded16 years ago 10 replies

Hi, Is the 2051 capable of generating DTMF like what is described in AN655 of the microchip Apnotes? If not, can someone recommend a cheap...

Hi, Is the 2051 capable of generating DTMF like what is described in AN655 of the microchip Apnotes? If not, can someone recommend a cheap and easily available chip that would be interfaced to the 2051? I know I can get the DTMF dialer chip from a used telephone set but it is normally for connecting to a numeric keypad instead of the data lines of the cpu. Thanks and regards. Alle...


TQFP handling while developing

Started by Paul Rosen in comp.arch.embedded16 years ago 10 replies

Hi @ll Microchip offers his new controllers (i.e. dsPIC) with > 40 leads only in the TQFP but not PLCC package. Sockets for TQFP are not...

Hi @ll Microchip offers his new controllers (i.e. dsPIC) with > 40 leads only in the TQFP but not PLCC package. Sockets for TQFP are not reliable. Thus they are no solution. What does that mean? The original PCB cannot longer be used for developement, because sockets are not possible. You have to design a special PCB for that. The only way I found, is to solder the device under tes


microcontrollers supported for critical systems

Started by rich...@gmail.com in comp.arch.embedded12 years ago 3 replies

Can someone suggest a simple microcontroller that doesn't carry the "not for use in life support systems as a critical component" disclaimer? ...

Can someone suggest a simple microcontroller that doesn't carry the "not for use in life support systems as a critical component" disclaimer? Having an Ada compiler would be a big plus. This is going to be a watchdog for computer components of a medical monitor, so it doesn't need to be very powerful but it does need to be reliable. We've been prototyping using Microchip PICs, and I was ...


Need schematic to make programmer for PIC18 family PICs

Started by Anonymous in comp.arch.embedded14 years ago 4 replies

I would like to build my own programmer for Microchip PICs. There are many schematics on the Internet available but I can't seem to find exactly...

I would like to build my own programmer for Microchip PICs. There are many schematics on the Internet available but I can't seem to find exactly what I want. What I would like is something that provides all (or most) of the following functions: * Can program PIC18 family of devices (or all of the major PIC families if possible) * In-circuit programming (not debugging): the electronics us...


PIC (Microchip) assembler syntax query

Started by bruce varley in comp.arch.embedded14 years ago 4 replies

Hi, Maybe deserves an RTFM response, but I've just spent an hour on this with no success. I appear to be trying what the various advice...

Hi, Maybe deserves an RTFM response, but I've just spent an hour on this with no success. I appear to be trying what the various advice notes suggest, but it isn't working. I'm declaring data memory space (starts at 0x20), up to now have been doing it clunkily as follows: REG1 EQU 0x20 REG2 EQU 0x21 But with other platforms one usually declares the locations themselves, as ...


olimex PIC-ICD2

Started by fred in comp.arch.embedded15 years ago 1 reply

After getting my feet wet with a small photovore robot, now i want to experiment some more. Previously I was using a crude programmer that i...

After getting my feet wet with a small photovore robot, now i want to experiment some more. Previously I was using a crude programmer that i built myself, but i'd really like some debugging features. Sparkfun has the olimex PIC-ICD2 ( a drop in replacement for the Microchip In-Circuit-Debugger 2 (ICD2)) for about $95.. Does anyone have any experience with this product? Does it work as...


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


getting started on C programming on PIC16F628A, PIC16F690, OR PIC18F2620

Started by ssylee in comp.arch.embedded12 years ago 4 replies

I'm trying to get started with C programming on either one of the PIC microcontrollers in MPLAB IDE using C18 compiler (or any other C compiler...

I'm trying to get started with C programming on either one of the PIC microcontrollers in MPLAB IDE using C18 compiler (or any other C compiler that Microchip makes), however, I'm having some trouble drafting a source code that has, for example, LEDs flashing or display a "Hello World" message through printf() and in such fashion that I can see it on a host computer. Does anyone know any good...


Which PIC18 C Compiler?

Started by Talal Itani in comp.arch.embedded12 years ago 87 replies

Hello, I currently have an ICD2 from Microchip. I use it to develop PIC16 code using the MPLAB debugger and assembler. I need to move to the...

Hello, I currently have an ICD2 from Microchip. I use it to develop PIC16 code using the MPLAB debugger and assembler. I need to move to the PIC18 parts and C language, but I am struggling figure out the development tools to get. Do you have any experience with the CCS compiler running with MPLAB and ICD2? ($175 solution) Thanks, Talal


ENC28J60 layout

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

Hello, I'm a new bee to PCB design and trying to layout ENC28J60. I didn't find any layout rules for the device in microchip website. Can...

Hello, I'm a new bee to PCB design and trying to layout ENC28J60. I didn't find any layout rules for the device in microchip website. Can anyone share what rules need to be followed for routing? If you have image of design which has been already routed, it will be helpful. Regards, Sriram


DIY PIC programmer (16F88)

Started by Damn Dan in comp.arch.embedded13 years ago 18 replies

I've been working on a PIC programmer for my 16F88. So far I've met a mild degree of success, but I've run into a strange roadblock. I...

I've been working on a PIC programmer for my 16F88. So far I've met a mild degree of success, but I've run into a strange roadblock. I think it may have something to do with my reset routine. The Microchip documentation is... well... lacking, to put it generously. I've used the 16F88 Programming Specification document up until now, but I'm finding it more and more difficult to uncover spe...


dsPIC 1024 or 2048 FFT?

Started by Thomas Magma in comp.arch.embedded12 years ago 3 replies

Hello, I'm programming a dsPIC33 that has 16384 bytes of RAM. I'm trying to figure out if I can do a 1024 or 2048 FFT with this device. The...

Hello, I'm programming a dsPIC33 that has 16384 bytes of RAM. I'm trying to figure out if I can do a 1024 or 2048 FFT with this device. The code examples and twiddle factors provided from Microchip only allow lengths up to 512. Does anyone know if longer length FFTs are possible on the dsPIC33? Thanks, Thomas Magma


MPLAB IDE v7.10 [Logic Analyzer]

Started by Thomas Magma in comp.arch.embedded15 years ago 1 reply

Wow!! What a difference from the old Microchip simulator. The speed improvement is night and day, and the new logic analyzer is very...

Wow!! What a difference from the old Microchip simulator. The speed improvement is night and day, and the new logic analyzer is very handy. I'm having a few problems with the Logic Analyzer settings though. The triggering doesn't really make sense to me and it won't let me enter anything into the Trigger PC test box. Also it only has one selection for the Time Base but the documentation say...


implementing ethernet server on FPGA or other choices

Started by Anonymous in comp.arch.embedded12 years ago 5 replies

i have to build a weather station. the data from the sensors is to be transmitted via ethernet and IP protocols.. i couldnt really reach a...

i have to build a weather station. the data from the sensors is to be transmitted via ethernet and IP protocols.. i couldnt really reach a decision on which of these develpoment tools should i use.. or which one is better..? 1. FPGA 2. PIC18F + EN28J60+eeprom ( all from microchip) 3. microntroller with built in ethernet controller OPTION1: its a college project, so FPGA's are readily ...


Next generation products - microprocessor family

Started by Gian in comp.arch.embedded14 years ago 21 replies

Hi all, we're trying to solve a complicated task. We have to choose uP' family for our next generation's products. Since now we disperse a...

Hi all, we're trying to solve a complicated task. We have to choose uP' family for our next generation's products. Since now we disperse a lot of energy (and money of course) in different system equipped with: - infineon C167CRLM - fujitsu MB90545 - various microchip - some atmel (AVR) - some TI (don't remember partname) Mine product are something like PLC. To be more precise, produ...


Microchip Pic32 exception: ???

Started by Claude in comp.arch.embedded8 years ago 10 replies

Hi. I'm trying to understand the Pic32 (a decade of familiarity with Pic16 and Pic18). I got myself an Ethernet Starter Kit. The demos run,...

Hi. I'm trying to understand the Pic32 (a decade of familiarity with Pic16 and Pic18). I got myself an Ethernet Starter Kit. The demos run, and I have been able to edit them. So I tried to get two stacks working together. I then proceeded merging the TCPIP demo and the USB MSD demo. The latter just looks for a pendrive and when it sees it a simple text file gets written. The TCPIP integ...


regarding DAC in dsPIC33FJ128GP802

Started by bharath reddy sareddy in comp.arch.embedded10 years ago

hi frds im using dsPIC33FJ128GP802 for my application im trying with ADC-DAC loop back as intial step. my ADC is working finely but i have a...

hi frds im using dsPIC33FJ128GP802 for my application im trying with ADC-DAC loop back as intial step. my ADC is working finely but i have a strange problem with DAC.......... intially data register(DAC1RDAT) is loading with default value and then always it is going to zero.............. i have tried with the example given by microchip also.....it is also giving the same problem i m not...


PicForth 1.0 is released

Started by Anonymous in comp.arch.embedded15 years ago 37 replies

PicForth 1.0 has been released today. PicForth is a Forth cross-compiler running on Unix hosts (tested on FreeBSD) and targetting the Microchip...

PicForth 1.0 has been released today. PicForth is a Forth cross-compiler running on Unix hosts (tested on FreeBSD) and targetting the Microchip 16F8xx family of microcontrollers. PicForth 1.0 is hosted by gforth 0.6.2. For more information, please look at: http://www.rfc1149.net/devel/picforth/ PicForth 1.0 is mature and is already used in production at several places. Sam -...