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标题: In-Circuit PIC Loader [打印本页]

作者: liyf 时间: 2011-11-24 20:45
标题: In-Circuit PIC Loader
[size=+4]In-Circuit PIC Loader [size=+2]Wichit Sirichote, kswichit@kmitl.ac.th

[size=-1]This loader connects the PC printer port and works with WinPic800. The loader gets DC supply from application board and provides +12V for high voltage programming mode. We can use it for programming many PIC chips easily.

[size=-1]Figure 1: In-circuit PIC Loader.
[size=-1]Hardware Schematic [size=-1]The In-circuit serial programming for PIC chips requires only three signals, i.e. a bi-directional DATA line (PGD), a synchronize clock (PGC), and a +12V Flash programming voltage (VPP). U1A is a tristate buffer for sending data stream. U1B is for clock stream. Both gates disconnect the signals, PGD and PGC from application board when VDD is turned off. The programming voltage +12V, is generated by DC-to-DC converter, U4 MC3406A. The hardware settings for WinPic800 is compatible with Propic2.
[size=-1]Figure 2: Schematic and BOM.

[size=-1]The layout of TOP and BOTTOM layers are shown below.

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[size=-1]Figure 3: TOP layer. [size=-1]Figure 4: Bottom Layer.

[size=-1]Figure 5: Component Layout. [size=-1]Figure 6: The test board PIC18F458 and DS1820.
[size=-1]I built the test board with PIC18F458, DS1820 and 20x4 LCD display. Figure 7 shows hardware schematic of the test board. The test program displays temperature from -40C to +150C on LCD. Figure 8 shows code window of PIC18F458.

How to use WinPic800 with PIC loader.

1. Select PIC chip.
2. Load hex file.
3. Set hardware mode to Propic2.
4. Check configuration fuses.
5. Click program.

[size=-1]Figure 7: Test board schematic. [size=-1]Figure 8: Code window of PIC18F458.

[size=-1]Download

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[size=-1]Schematic PICLOADER and TEST BOARD [size=-1]picloader.pdf testboard.pdf
[size=-1]LCD Test code [size=-1]LCD_TEST.HEX

作者: ktoker 时间: 7 小时前
这是PROPIC（全光隔离）并行端口编程器的复杂版本，适用于18引脚和40引脚PIC单片机，也支持ICSP接口，用于1998年开发环境下的特殊设备。底部电路板上装有待编程的单片机，处于工作模式。提供编程/运行模式。它实际上是一个USB开发板，包含USBN 9603系列外设。我曾用它开发过多种USB设备，例如键盘、轨迹球、游戏手柄、数据采集卡等。

Propic1.jpg (602.19 KB, 下载次数: 6)

Propic2.jpg (585.25 KB, 下载次数: 5)

欢迎光临 DIY编程器网 (http://www.diybcq.com/)

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[size=-1]Figure 3: TOP layer.	[size=-1]Figure 4: Bottom Layer.


[size=-1]Figure 5: Component Layout.	[size=-1]Figure 6: The test board PIC18F458 and DS1820.


[size=-1]Figure 7: Test board schematic.	[size=-1]Figure 8: Code window of PIC18F458.

[size=-1]Schematic PICLOADER and TEST BOARD	[size=-1]picloader.pdf testboard.pdf
[size=-1]LCD Test code	[size=-1]LCD_TEST.HEX