PIC Programming Using ICSP

7/12/2013 PIC Programming using ICSP

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PIC Programming using ICSP.

How to program your PICmicrocontroller using ICSP...

This page shows you how touse ICSP for PIC programminggiving some ICSP connectiondiagrams.

Note that most of this pageshows you how to useICPROG which is a parallelport/serial port basedsoftware that requires use ofan older computer havingeither a serial port or a

parallel port. Thes days those interfaces have been replaced with USBports so you can not use ICPROG if you only have USB interface ports.

For USB ports, buy a USB programmer such as pickit2 or pickit3.

The rest of this page is left for reference for if you are using ICPROG and itis also useful to see the ICSP connections, that remain the same whicheverprogramming method you use.

ICSP

ICSP (In Circuit Serial Programming) is the serial interface used by the PICmicro to download a program into the PIC micro's program memory.

Note: You can also program the internal EEPROM as well.

You can learn more about ICSP here.

Jump to Using ICPROG

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Readers comments

PIC ICSP connections

This section shows connection pins for PIC programming.

12F675 : ICSP PIC Programming connections:

16F88 : ICSP PIC Programming connections:

Pic Projects

Programming

Pic Chip
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16F877A : ICSP PIC Programming connections:

ICPROG for PICMicro

ICPROG is a free windows program that you can use for PIC Programming. Itinterfaces using either the serial or parallel port on a PC, via programminghardware, to the ICSP pins on the PIC micro.

You can download ICPROG here [opens a new window].

ICPROG uses the hex file generated either from an assembler such asMPASM or a compiler such as MikroC.

When you first start ICPROG this is the screen you see for selecting thehardware for the PIC programmer; I have selected AN589 programmer - aparallel port programmer.
http://www.best-microcontroller-projects.com/c-programming-tutorial.htmlhttp://www.best-microcontroller-projects.com/begin-guide-sign-up.htmlhttp://www.ic-prog.com/http://www.best-microcontroller-projects.com/pic-programmer-circuit.html



- Anon

After this the main program screen is displayed. Don't be put off by all theaddress program code area. The important controls are the Open buttonand the buttons with ICs underneath.

Select Device

To use it for PIC programming select the device from the menu Settings-->Device--> Microchip PIC.

Here I have chosen a PIC16F877A device.

The Device menu also shows a lot of other devices that you can use withICPROG.

Note: The screen changes to accommodate the chip features (hereEEPROM oscillator, program 'Write enable' and chip configuration bits).



Hardware check

You can check to see if ICPROG is communicating with your hardware byusing the menu option Settings-->Hardware check. This lets you togglethe state of individual ICSP signals and the VCC power.

Note you'll need an oscilloscope or multimeter to check the signal state.

Load Hex file

The next thing to do with the PIC software is programming the PICby loading up the hex file (unless you have a 12F675 that has an oscillatorcalibration value that you will want to keep -in this case do a read first).

Note: You have to it is not defined in the hexfile. Although ICPROG stores the current device in use between sessionsyou have to select a new device manually when you start a new hardwareproject

Note: Fuses and oscillator settings controlled from the hex file so allyou need to do is check that they match your settings in the compiler or

assembler.

Hit the open button to load your hex file.

Note how the oscillator, write enable and fuses have changed (controlledfrom the hex file):



Erase device

The next PIC programming action is to erase the device by hittingthe erase device button. It sends a command to the PIC whicherases the whole device including protection bits (in newer

devices). Old devices used to be un-usable after you had set theprotection bits!

So this command quickly erases the chip.

Note: You don't have to use the erase button as the program button willoverwrite the chip contents anyway. It is sometimes useful if you want toconvince yourself that the program is actually programmed into the devicecorrectly.

Program device

The program device button does just that it programs the contentsloaded from the hex file (in ICPROG memory) into the program

memory of the PIC micro. If there is any EEPROM in the chip then itprograms this as well. Finally it programs the configuration word.

Verify device

The verify device button reads back the entire contents of the chipensuring that it matches the hex file (loaded into ICPROG).

Note: Depending on settings in menu :

Settings--> Options--> Programming

verification may automatically happen at the end.

Once you get used to ICPROG and your hardware works reliably you mayonly want to do a verify if something does not work otherwise it takesmore time up.

Read device

The read device button reads back the entire contents of the chipinto the currently selected buffer (shown at the bottom of the

ICPROG window). So you can save the hex file or compare it to thecontents of another buffer.

These are the only controls you need for successful PIC programming usingICPROG.

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