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In reality the RS232 is designed to connect generally ONLY two devices toghether.

The RS485 have the capability to manage multiple slave and one master.

In my project I have one master and I...

Your tips are pushing me towards the RS485.
The only trouble and not've never used before.

I am somewhat concerned about the protocol to use.

You have to give me a hint where to look to select...

If I have correctly understand, the maximum length from the capacitance point of view is around 8 meters, but what shall be the maximum distance for the single ended TTL?

Leo

Thanks to all of you for your greath wok!

... just to avoid to have trouble in future and have a clear view of a new project, I have in plan to use the slave routine on almost 12 PIC of 18F2550...

Ciao Ambrogio,

take a look here ... could help!

http://www.protonbasic.co.uk/showthread.php/70173-Replace-the-PRINT-command-to-use-I2C-backpack-on-1602-LCD

Leo

Hi,

thanks to the suggestion of Henrik Ollson on the thread:

http://www.picbasic.co.uk/forum/showthread.php?t=17877&p=119740#post119740

I have substitute the ASM/ENDASM to #CONFIG/#ENDCONFIG...

Hi,

I have commented all of that:

;--- if you un-comment these, you must comment the ones in the .inc file ---
'ASM ; 18F2550/4550, 8mhz crystal
' commented all to run , otherwize some error...

Thanks HenrikOllson

I have made the modification as you say and "automagically" all woks.

I will become crazy without your help.

Thanks again.

Hi

I'm using MCS 5.0.0.3 & PBP 3.0.6.1 (trial version).

I have a big doubt about the #CONFIG...#ENDCONFIG

On the Darrel Taylor USB sample program (USB.pbp) there are:

;--- if you...

Hi.

I have tried to compile the source code that is present on the first page of this thread and I obtain the following error message:



Error[118] ...

My mistake.

I do not have see that was set the default to the 16F628.

I select 18F4550.

Compile without errors and now the mouse pointer run squarelly.

Bye

Hi,

after almost 4 years of absence from this forum I'm back again.

I have just downloaded the PBP3 (15 day trial) and try to run the "USBMOUSE.pbp".

I will use the 18F4550 with 20 Mhz...

Hi,

it 's a good thing to use the output of the MAX232 DTR to reset the PIC for the bootloader, and use it for more PIC on the same board?

At present, each PIC has its own 4.7K pull-up resistor...

Hi Henrik,

your suggestion is illuminating.

I have commented the following statement into the c:\pbp\18F455.inc

; __CONFIG _CONFIG1L, _PLLDIV_5_1L & _CPUDIV_OSC1_PLL2_1L &...

Hi Darrel,

Many thanks for you help.

I have followed the indication of yor post at:

http://www.picbasic.co.uk/forum/show...&postcount=198

but when i compile, I see errors as for the...

Hi Darrel

many thanks for your answer, but now I'm a little bit confused.

If I have correctly understand, USBdemo cannot be compiled vith PBP 2.60? :(

Also I do not know if I'm using the...

Hi Joe,

the "D" is a partition of the main hard disk. No CD are used.

I have copied into the source directory the following file:

pbppic18.lib
18F4550.bal
PBPUSB18.LIB

Hi,

I have preferred to open a new tread about the USBDemo of Mister_E in order to have a clear start condition using the last release of PBP and the MPLAB.

I have downloaded from
...

Hi Dave,

I need help about the SPI interface because I never used before.

Looking at the tread is difficult to understand the way to send data to the RFM12. I would understand clearly the PBP...

Hi davewanna

at the end; what about your project.

Are you satisfied about the RFM12.

I have just ordered some of that modules to make some RF trial; as I'm a novice in RF and SPI...

Hi

problem solved. I have swapped SDA with SCL. Now work perfectly.

Thanks skimask for your suggestion.

Ciao

Leo

Hi to all.

I need to use the PCF8574 to increase the number of I/O pins. I have e trouble to work with it.

I use:

SCL var PORTC.3 ' Clock pin pull up 4.7K
SDA ...

Sorry for delay to upload the code.

Also I have upload tree screenshot of a digital oscilloscope to better explain what happens.

Channel B show the incomin IR signal and channel A should show...

Hi mackrackit,

the statement is correct, I read the "down" time of the signal, ad the value returned by PULSIN is correct and into the value that I aspect.

I do not see the pulse in phase with...

I would better understand how work PULSIN statement.

I'm using PULSIN of PICBASIC PRO rel 4.47 on a 16F877 at 20 Mhz for decode IR from remote, using Sony format.

In order to better understand,...