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133 Threads found on Can pic18f
Hello! My PIC runs at 32MHz. How much us would it take to read a block? What block size? It depends on the SPI flash and also how you program your ?P. If you use a 80 MHz flash in SPI, then you can read 10 MBytes per second (in regular SPI). As many chips have blocks of 256 bytes (some are 264), then you can calculate ho
hello, you can start with a big PIC , to avoid later ,problem of lack of RAM or ROM space The advantage is to keep the same MCU along developpment because even the same 18F family, there are somme differencies between them, and causes lost of time to solve details or supposed bugs. I recently bought 18F87J50 clicker2 board wich has
I am reading the datasheet of a pic18f with a EUSART. It has an optional 9th bit that be used in receiver and transmitter. ASCII characters fit in 7 bits and a byte is 8 bits. Why then would someone want to transmit 9 bits? It this was 16 bits it would make sense but 9 bits makes no sense at all. The hardware does not have any ability to calc
I can't help with FRDM because I don't have a Compiler for that and I have not used that device. However I can help if you can use pic18f. From where can I buy FRDM k64f online. Shipping should be cheap or Free shipping. Also where can I get the free version of the compiler for it ? I (...)
You need to be very careful with the actual device you are using as there can be differences between them. However, in general for the pic18f devices, the "stack" is actually called the "return address stack" and that is the one that has 32 entries. In general the compiler DOES NOT push parameters onto this stack as it is NOT a general purpose sta
Hello every one I have a project with pic18f97J60 because of the ethernet communication capability in it, but I didn't found it in ISIS proteus and in microC for PIC also how can I add it to them, thank you.
For MikroC you can configure it my using the GUI interface : MikroC Project Settings. For MPLAB you can go to Window >> PIC Memory Views >> Configuration bits.... For CCS, you have the PicWizard...Anyway, in shorts, you have to spend some time to get introduced on the basics of the subject you are asking for
Dear All, can you suggest me the best "PIC Microcontroller Development Board / Trainner Board" for pic18f series. Thanks
Thank you sir for your opinion. can you suggest me filter and protection circuit which should be used in electronic circuits for the Industrial environment. Thats huge help. :)
PIC18 has a dedicated hardware stack which only holds return addresses pushed during call and rcall instructions or interrupts. Stackoverflow can happen by having too many nested function calls or various kinds of coding errors. You should be able to understand the cause by analyzing the compiler listing or tracing code execution in simulator.
The answer can be found in any PIC18xx datasheet and more detailed in the PIC18 family reference manual. The processor family has an instruction word width of 16 bit and respectively 16 bit ROM/flash width.
If you are utilizing either the Microchip XC8 or C18 compilers, both provide the XLCD library which supports either the 8-bit or 4-bit interface to HD44780 compatible LCDs. You can find the source code for the XLCD library in the: \sources or src\plib or pmc_common\XLCD Depending on the comp
Hello, I have designed a pcb with relay that triggered some device. I used dry contact relays. But relays are expensive and wanna use opto-mos relay. Is it convenient? Also how can I use it. I searched especially cpc1017n. But I havent found more details especially how to connect with microcontroller(pic18f series). can you give any (...)
don't forget also, to treat error flags inside receive interupt , wich can block the flow of data.. especially with pic18f Frame eror and Overrun error ..
1 cycle =1000000 / in ?S FOSC can be internal (inside the PIC) or external , use of a Quartz or an external clock device generator. for Other pic18f you can active a PLL multiplicator => FOSC*4 => 1 cycle= 1000000/ FOSC ?S for executime time Code operation take mainly 1 cycle ( it's explain why we divide FOSC/4) but some
As nobody answered, MPLAB ceased development over a year ago at version 8.92. MPLABX is it's replacement and is still the current release of IDE. Unlike 8.92 which is for Windows only, MPLABX is cross platform. Within MPLABX you can install almost any compiler you want but the best ones for continued support from Microchip are the ones they prod
HI, Recently i started working on freertos on pic18f4520, I just downloaded the source files from website. So how to create semaphore and queues, how can we implement them on freertos, any reference docs Anyone help me out................ I am very thankful to you
This tutorial is a modular way of adding interfaces one at a time. Though it was designed for PIC16F family of chips it can be easily be ported to hardware and software in assembly are included. Allen
hello, you can buy pic18f with a bootloader allready included.. see MikroE example : 18F2550_startusb or others ..
Any solutions guys? I don't have the hardware, it is at customer end. I can't debug properly. Source code i have and i can send them to customer to test it. Newly created hex file is still not working. And old Hex file working perfectly. What it could be? can i see anything from .map or .lst file? or project settings save
hello, I don't know PIC24F serie but on pic18f serie we must use LAT instead PORT to write a bit into a PORT #define EN LATDbits.LATD4 #define RS LATBbits.LATB15 #define DATA LATE and a remark it is not a good habit to use label definition as DATA sometimes compiler can be confused No probleme in french, i use "Donnee" (for va
Dear all I need to interface 16*2 LCD with pic18f micro-controller.can any one post the library for LCD Thanks in advance the Microchip MLA contains a file LCDblocking.c for controlling an LCD using a PIC18, PIC24, etc
You implementation is correct. You need max232 for connecting pic to pc. Google is your best friend. Search this forum first. You can find lot of information here.
hi daniii if you have not enough knowledge about USB communication, its better to use USB to UART ICs to send and receive data over USB. then you can use a low cost MCU without USB module.
Internal eeprom memory will not be sufficient to hold all the data. Is it a college project or a job project. 8051 also doesn't have SPI and I2C. If you want to store data in eeprom then you will have to write software SPI or I2C routines to store and retreive data. I can help if pic18f is used. You can also use SD card to store data. Data (...)
Use I2C or SPI interface. Connections can be done over pin header, wires,... MMA7455L ?2g/?4g/?8g Three Axis Low-g Digital Output Accelerometer Best regards, Peter
Hi.. I have 3.2" touch screen mounted on a ,3.2" TFT display which has a resolution of 320x240. The touchscreen has a touch controller XPT2046/ADS7843 which has a 12 bit adc inside. I have managed to interface it to my pic18f on which i can read the touch co-ordinates which vary from near about 100 to 3900 on for each axis depending upon whi
I've been using MPLAB X IDE v1.60 to program mostly pic18f in assembly. My question is can I still use MPLAB X IDE to program a dsPIC chip in C? Yes. However, the task will require the installation of a compiler compatible with the dsPIC family, like XC16 or C30. BigDog
Does any one have code for 2p2z controller so it can be implemented on a pic18f ?
well... two anyway. PIC16F have a single interrupt vector so if you want to prioritize interrupts you have to do it in software. pic18f series have two interrupt vectors although you can still use just one if you want. The high priority interrupt can itself interrupt the low priority one but if you want other priorities you still have to (...)
You mean you will get the value of flag from that address? Yes, it can be accessed at runtime. How come pic18f device comes under C32 Compiler?
hi i need to interface bluetooth module to store data for my project, can any one guide me to do that with low cost module. i have came to know that some one mentioned that having working code for this, kindly can u upload that. i saw that in below link you have to
Hi .. everyone i am using pic18f microcontroller. i have to build a system which response in real time manner. so please guide me how multitasking can be performed by MCU and what is standard algorithm of software behind multitasking
Hi, Do not quiet understand your problem as the bootloader just allows you to download your program code and then execute it...? You can do what Jayanth suggests and program the chip via a proper programmer like the Pickit2 or 3 which uses pin 1 , 39 and 40 of the pic18f4550 chip to program the code. can you make those pins available (...)
For 0.5 to 4 Hz input frequency you can uses 16 series. if you go for 18 serial you will get high speed and high resolution adcs
hi everyone i want to communicate 2 pic18f micro controllers using can protocol and i wrote a software for each of them if i want to simulate it by proteus software how should i connect the cantx and canrx nodes? does anybody have an example program for can protocol in pic18f?? if i (...)
HI guys, Well to start with my project requires Data Logging , so i used a SDHC card interface PIC18 with SPI, and i can write raw data, no probs... but of course post logging analysis in WINDOWS is not possible, so I wrote a basic FAT32 implementation in ASSEMBLY, that does the following 1) Reads MBR and gets necessary Values for LBA calcul
Microchip's Stack & demo files are part of the "Microchip Libraries for Applications". They have versions for Windows, Linux & Mac. You can download the appropraite version from this page:
hello.. I have a problem in Microchip MDD library function. I want to open an existing file to read some byte. there is a function call "FSfopenpgm" but its only work on pic18f divices. Then how can read an existing file to read using dsPIC30F6014A ??? please help me in this...! :lol: I saw a example code like below. But its
Hi all, can someone please suggest me a suitable opto-isolator for SPI communication. It should be cheap and thru-hole. This is to isolate a pic18f and a ade7758 ic. I am hoping to use a 4MHz crystal for the pic. Thanks in advance Hi Gehan So is that means that your communicated signal through this opto coupler is a 4MHZ s
Step Count = (VREF / (Total No. of Steps)) * ADC result Step size = VREF/(Max count) So, the step size would be (3.3/1024) Be careful, total no. of steps is 1024, not 1023. The minimum external voltage reference you can use is 3.0V (if VDD ≧ 3.0V) or 1.8V (if VDD < 3.0V). Hope this helps. Tahmid.
There is a standard MIPI for RF front end solution. (RFFE). I am thinking to get this signal with microcontroller, but the controller I know is pic18f. I can write the command by modifying SPI with pic18f2550, but it seems it is difficult to make it work for read command. The MIPI master or slaver uses one pin for read and command (...)
Potentiometer is a variable resistor which can be used as voltage divider, with three leads 123... it appears full resistance across 1 and 3. the nob in 2nd pin divides the full resistance and the divided resistance varies on moving(linear type) or rotating the nob given. the following link will help.
You can check at the link below;
Hi, Without seeing your code, its difficult to say whats the problem here .Anyway you can follow one of a method as shown in below, even though its belongs to pic18f with C18, make necessary changes to your PIC & compiler. Here the controller just enters to Interrupt when a first byte is recieved. After that its manually read the bytes . Also y
you can use a pic18f97J60 which has on board etherenet or some other microcontroler (PIC18, PIC24, dsPIC, PIC32) with a external ENC28j60 both work - full details on
Do you have any project based on can protocol or can module inbuilt in pic18f.Plz upload.
Hiiii, can i integrate pic18f micro controller with cc1180 and cc1101?? If yes, how it will work and how i do this???
Now i want to know how to interface zigbee and 6LoWPAN with pic18f micro controller. A simple way is to use AT commands with modules that support it. ATMEL's ZigBit modules for example. You can access the module via PIC's UART. www.atm
hey friends i'm interfacing pic18f 4520 with gsm 300 and using mplab c18 compilre and trying to send and receive msg . i'm able to send message but the problem is that i can,t receive msg .i'm trying to monito the string +CMTI:"SM",1. whenever this string comes my uc goes into receive interrupt method and i'm storing this response in char array msg