Olimex PIC-P40 User guide

Download

Page 1

PIC-P40 development board

Users Manual

All boards produced by Olimex are ROHS compliant

Rev.E, February 2008

Page 1

Page 2

INTRODUCTION:

PIC-P40 board is development board, which allow you to prototype and develop code for all Microchip’s PIC microcontrollers with 40 pins.

What you can do with PIC-P40? A lot of stuff let’s see what we have:

PIC-P40 have RS232 connector and driver, so you can interface your PIC microcontroller to other embedded or PC with RS232. The RS232 driver have 4 lines Tx, Rx, CTS and jumper selectable RTS or DTR. The pin labeled RX is output and should be connected to PIC UART Tx. The pin labeled TX is input and should be connected to PIC UART Rx. Note that MAX232 driver on the socket is 5V device, so if you decide to run your PIC on 3.3V you should replace it with MAX3232 which works on 3.3V

The on-board ICSP connector allow you to program the PIC on the board without pulling it of the socket, by ICSP programmer like PICMCP, PIC-MCP-USB, PIC-PG1, PIC-PG2, PIC-PG3, PIC-PG4 or to program and debug it with PIC-ICD2, PIC-ICD2-POCKET or PIC-ICD2TINY. IMPORTANT: all programmers provide power supply through

ICSP connector during the programming PIC-P40 should not be powered via the external power jack!

The power supply circuit have diode bridge after the power supply jack which allow you to power this board with both AC and DC power supply adapters. The input voltage could be anything within the range +7.5 – 15V DC or 6-12V AC.

Voltage regulator is made with LM317 adjustable voltage regulator and have jumper which selects what voltage you supply to the PIC microcontroller +3.3V or +5V, so you can work with PICs on both low and normal voltage.

The oscillator circuit is made with 20 Mhz crystal oscillator, so you can run your PIC at maximum performance.

The RESET circuit is made with simple RC circuit and RESET push button, the reason to not use RESET IC is that the board should support both 3.3V and 5V operation while RESET ICs are on fixed voltage.

PIC-P40 have user button for user input connected to PIC microcontroller’s RE2 port. When RE2 port is initialized as INPUT you will read “0” when the button is pressed and “1” when it is depressed.

Status LED is connected via jumper to PIC microcontroller’s RA0 port. When your RA0 port is initialized as OUTPUT and set to “0” LED will go ON, when RA0 port is set to “1” LED will go OFF.

PIC-P40 have handy GND pin for connection to oscilloscope.

Page 2

Page 3

Page 4

FEATURES:

• ICSP/ICD connector for programming and debugging

• RS232 interface with MAX232 IC on socket

• DIL40 microcontroller socket

• Quartz crystal 20Mhz

• LED to RA0 through jumper

• user Button to RE2

• Reset button and circuit

• Power plug-in jack, accept AC and DC input

• selectable +3.3V / +5V power supply voltage regulator (3.3V when jumper is

closed)

• Extension slot on every uC pin

• Gird 100 mils

• GND bus

• Vcc bus

• Four mounting holes 3,3 mm (0,13")

• FR-4, 1.5 mm (0,062"), green soldermask, white silkscreen component print

• Dimensions 100x80 mm (3,9x3,15")

Page 4

Page 5

SCHEMATIC:

ICSP

12345

RB3/RB5

123

PGM/RB3

RB134RB235RB437RB5

INT/RB0

RE0/RD#/AN58RE1/WR#/AN69RE2/CS#/AN7

PSP4/RD427PSP5/RD528PSP6/RD629PSP7/RD7

OSC1/CLKIN13OSC2/CLKOUT

TX/RC6

RX/RC7

SDI/RC4

SDO/RC5

RC0/T1OSO15RC1/T1OSI16RC2/CCP117RC3/SCK18RD0/PSP019RD1/PSP1

4-20MHz

RD2/PSP221RD3/PSP3

PIC16F87SS

12 31

VSS

LED

1N4004

10K

C11C12

C13

100n100n

PGC/RB639PGD/RB7

11 32

VDD

MCLR#/THV

2 1

RA0/AN02RA1/AN13RA2/AN24RA3/AN35RA4/T0CKI6RA5/AN4

330

LED_J

C10

22p

10k

RST

+5V

BUT

PIC-P40

Rev. E

http://www.olimex.com/dev

+5V

100n

CTS

240/1%

3.3V

4.7uF/25VDC

RTS/DTR

4.7uF/25VDC

C2-

RS232

T2IN

T1IN

R1OUT

T2OUT

R1IN

T1OUT

12345

678

1516

R2OUT

R2IN

GNDVCC

U2P

MAX232

+5V

123

12-RTS

23-DTR

ADJ

IN OUT

LM317

VR1

C7 C8

B-DIL

390/1%

330/1%

C1-

C1+

C2+

V+2V-

470uF/16VDC 100uF/16VDC

+5V

4.7uF/25VDC

PWR

Page 5

Page 6

SOFTWARE:

DEMO1: PIC16F877-I/P BLINK LED

This is demo code which blinks the LED on PIC-P40 board.

Note:

LED jumper should be closed!

DEMO2: PIC16F877-I/P BUTTON read

This is demo code which show how to read BUTTON status and to switch the LED ON when button is pressed and LED off when the button is depressed.

DEMO3: PIC16F877-I/P RS232 send / receive routines

This is demo code, which show how to use the USART to send and receive characters from host PC via RS232 cable.

The MAX232 by default is not connected to PIC on the board so you have to solder two wires – one from RC6 (pin #25) of PIC16F877 Tx signal to MAX232 Rx labeled pin, and second from RC7 (pin #26) of PIC16F877 Rx signal to MAX232 Tx labeled pin.

You must program the HEX code to PIC16F877 and run the code.

If you programmed the PIC correctly and wired the UART, when you open Hyperterminal on your host PC computer with 9600 bps, 8 data bit, 1 stop bit, No flow control and apply power supply to the PIC-P40 every character you type on the hyperterminal will be printed back with “*” i.e. if you type “abc” you will receive “a*b*c*”.

Page 6

Page 7

ORDER CODE:

PIC-P40 – assembled and tested (no kit, no soldering required) PIC-P40/PCB – blank PCBs only

How to order? You can order to us directly or by any of our distributors. Check our web www.olimex.com/dev

Revision history:

REV. E - create February 2008

for more info.

Page 7

Page 8

Olimex Ltd. Other terms and product names may be trademarks of others. The information in this document is provided in connection with Olimex products. No license, express or implied

or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Olimex products.

Neither the whole nor any part of th e information contained in or the product described in this document may be adapted or reproduced in any material from except with the prior written permission of the copyright holder.

The product described in this document is subject to continuous development and improvements. All particulars of the product and its use contained in this document are given by OLIMEX in good faith. However all warranties implied or e xpressed including but not limited t o implied warranties of merchantability or fitness fo r purpose are excluded.

This document is intended onl y to assist t he reader in the use of the product. O LIMEX Ltd. shall not be liable for any loss or damage a rising from the use of any information in this document or any error or omission in such information or any incorrect use of the product.

Page 8