Search found 694 matches

Return

by kersing
Fri Dec 16, 2011 6:06 pm
Jump to forum
Jump to topic

Re: Elektor Live & Element14 Wireless LAN & Twitter

Hi John,

For windspeed (and other sensors) you could try hobbyboards.

Regards,

Jac
by kersing
Sun Jan 08, 2012 3:24 pm
Jump to forum
Jump to topic

Re: measuring pulsewidth

exactly what is the interrupt priority, i've asked that question a few times with no results, or where do i find that info?..... Generally speaking: interrupt priority allows multiple interrupts to occur at the same time where the interrupt with the highest priority will be serviced first. Interrup...
by kersing
Wed Feb 01, 2012 8:37 am
Jump to forum
Jump to topic

Re: other LCD device?

There is a large choice of displays with all kinds off different interfaces available on the market. I do not think Matrix will be able to provide components for every one of them. If you use one of the LCD displays with a more or less standard electrical and command interface the provided component...
by kersing
Sat Feb 11, 2012 2:15 pm
Jump to forum
Jump to topic

Re: PIC16F88 vs PIC16(L)F88

Hi Chris, What oscillator mode are you using? When looking at the 16(l)f88 data sheet page 165 (chapter 18.1) in the conditions column it states "HS, XT, RC and LP Oscillator mode" for the LF version. If you are using the new (according to page 35) modes RCIO, INTIO1, INTIO2 or ECIO that m...
by kersing
Sat Feb 11, 2012 7:53 pm
Jump to forum
Jump to topic

Re: PIC16F88 vs PIC16(L)F88

Chris,

Something completely different. Have you enabled brown out detect in the (expert) settings? If so you'll need to disable it as it will keep the chip in reset mode until the voltage exceeds 3.65V.

Regards,

Jac
by kersing
Sat Feb 11, 2012 7:41 pm
Jump to forum
Jump to topic

Re: PIC16F88 vs PIC16(L)F88

Chris, According to the data sheet your osccon settings should be right. The chip settings are where the settings I mentioned earlier are configured. From the data sheet (and the additional information in Oscillator - PICmicro Mid-Range MCU Family ) my best guess is you need to select "EXTRC as...
by kersing
Fri Feb 17, 2012 11:27 am
Jump to forum
Jump to topic

Re: UART between 2 PIC16LF88's

Chris,

Early on in the thread you mention the 16LF88 being 2.5 to 3.3V only, that is not the case, they are rated 2.0 to 5.5V. For testing you can replace one of them with a 16F88 and feed the circuit 5V just like when you are using both 16F88 chips. Could you try that?

Best regards,

Jac
by kersing
Fri Feb 17, 2012 2:15 pm
Jump to forum
Jump to topic

Re: UART between 2 PIC16LF88's

... but I am interested in the 1.8v of the LF88's to give me better battery life. Chris, Please note the data sheet lists 2.0V to be the minimum supply voltage for the 16LF88 devices. For 1.8 volt you will have to choose a different device. (You can use the product selector to find them) Regards, Jac
by kersing
Wed Feb 22, 2012 1:09 am
Jump to forum
Jump to topic

Re: serial USB doesn't start

Jan, According to the diagram in the ECIO data sheet on page 3, the LED is connected to RA5 on ECIO28P or RE2 on ECIO40P. Regarding the timers, I found no references to the timers in the Matrix supplied USB code for Flowcode 4 or 5. The Microchip data sheet of the 18F2455 does not refer to the timer...
by kersing
Sat Feb 25, 2012 6:18 pm
Jump to forum
Jump to topic

Re: Flowcode v4 port interrupts help

Hi, On small PIC microcontrollers only one interrupt can be active at a time. As you are not returning from that interrupt new interrupts will be ignored. A solution for your problem would be to set a variable to a predefined value (a flag) in the interrupt routine and check for that value in the ma...
by kersing
Wed Mar 21, 2012 12:11 am
Jump to forum
Jump to topic

Re: KEYBOARD USB

Sorry to disappoint you, but what you want can not be done with a PIC18F2550. Starting at the beginning, there are three types of USB devices: 1) USB Host, examples: computer, media player. These devices have a USB type A socket. 2) USB Slave, examples: keyboards, mouse, USB flash drive, USB disk dr...
by kersing
Fri Mar 23, 2012 11:17 pm
Jump to forum
Jump to topic

Re: Please Help!!! Desperately needing guidance on Zigbee

How do i initialise the xbee using at commands? Start by downloading the "Product Manual" at the Digi website so you have a reference... Then take a shortcut by connecting the module to a PC and check the commands X-CTU sends to the board when you connect to the other module. There should...
by kersing
Mon May 28, 2012 11:50 am
Jump to forum
Jump to topic

Re: Clock will not start

My understanding is that CLKOUT comes from before the PLL thus 1MHz is correct for 1). Looking at the data sheet (2.6) I do understand where you are coming from. However, it does not explicitly state this. And looking at figure 3-3 it seems to be the clock divided by 4. Have you noticed the PLL is ...
by kersing
Mon Jun 18, 2012 8:55 pm
Jump to forum
Jump to topic

Re: EEPROM (how works question)

question on how eeprom works with a **16f1938** ... when writing to eeprom i simply write to addresses 0-255 is that right? Correct. but i can only write 8 bit numbers to a location? if thats true why does it ask for a "uint" variable? .... Only 8 bit wide for 8 bit PIC devices like the o...
by kersing
Sat Jun 23, 2012 6:32 pm
Jump to forum
Jump to topic

Re: Stack Overflow

Hi Jan, Are you sure you are interpreting the memory usage correct? The linker output suggests heap (RAM not used by global and local variables) is 76 bytes and at one point in the code you are allocating 75 bytes of it in one go. If you are not trying to allocate more before releasing the allocated...
by kersing
Mon Jul 16, 2012 7:01 pm
Jump to forum
Jump to topic

Re: Flowcode + MPLAB compile errors

Could you try adding -N 50 to the compiler command line? This should increase the number of significant characters in the identifiers from the default 31 characters to 50 characters. (reference)
by kersing
Mon Aug 06, 2012 7:26 pm
Jump to forum
Jump to topic

Re: How do I read rs232 and get correct byte into variable?

Question 1 Let's say I want to send 5 bytes of data to control my cable reel. How do i ensure that i put correct byte into each variable? Maybe first byte is always value 120? As you suggest sending a special first byte to signal the start of a sequence is a good way. Preferably a value that does n...
by kersing
Sun Sep 23, 2012 6:45 pm
Jump to forum
Jump to topic

Re: Website Problem

If you view the message as text the URL can be cut-and-pasted. Here is the article you are looking for.
by kersing
Sat Sep 29, 2012 9:16 am
Jump to forum
Jump to topic

Re: V5 Erro Message

I have just installed V5 i am now trying to program a PIC16F886 using my HP 488-00-3 board but it is giving me a Error message (Failed to get data for CONFIG8L) What should i do Have you tried searching the forum (top right corner of the browser window) for this error? Here is a solution for cases ...
by kersing
Sat Sep 29, 2012 11:17 pm
Jump to forum
Jump to topic

Re: Enabling PLL on 16Bit chips

Martin,

Are you not looking for the "001 = Fast RC Oscillator with Postscaler and PLL module (FRCPLL)" mode for NOSC?

Best regards,

Jac
by kersing
Sun Sep 30, 2012 10:54 am
Jump to forum
Jump to topic

Re: Enabling PLL on 16Bit chips

Martin, After compiling your project importing the hex file into MPLAB gives: error.jpg A sure indication something is wrong. So time to investigate some more... When changing oscillator settings in FC chip configuration the value of LASTWORDMINUSONE changes. According to the data sheet this means L...
by kersing
Sun Sep 30, 2012 1:12 pm
Jump to forum
Jump to topic

Re: Enabling PLL on 16Bit chips

You are welcome.

It certainly looks like a PPP issue to me. Hopefully someone at MM will be able to solve this and release a fix as your current work flow works but is cumbersome.

Good luck with your project!
by kersing
Tue Oct 23, 2012 6:16 pm
Jump to forum
Jump to topic

Re: How to use internal clock on 16F88 ?

You need to connect a pull-up to pin 4 (MCLR). In your current setup the PIC stays in reset. (An other option is to configure pin 4 to be input by setting 'RA5/MCLR Pin Function Select' to RA5 in the chip properties)
by kersing
Sat Nov 17, 2012 12:31 pm
Jump to forum
Jump to topic

Re: Random Number Generation

To create an array (A single variable name that can be assigned with multiple values) Just create variable as normal and at the end of the variable place amount of multiple variables required within squared brackets. E.g you want to assign a variable called random_Num with 49 different numbers then...
by kersing
Mon Nov 19, 2012 12:21 am
Jump to forum
Jump to topic

Re: LCD initializing problems, ok on HD44780

Enamul,

Would it not be a better idea to just create a flow chart and use "Modify component code" to change the C code for the start macro? That obsoletes the need to make a backup of the file as the change is for that flow chart only...

Best regards,

Jac