RPI I2C GPIO Extend Board SKU:EP-0013 - Revision history

Yoyojacky: /* How to use */

2017-06-06T03:25:18Z

How to use

← Older revision		Revision as of 11:25, 6 June 2017
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	#include <wiringPi.h>		#include <wiringPi.h>
	#include <pcf8574.h>		#include <pcf8574.h>
	~~Initialise~~

	pcf8574Setup (int pinBase, int i2cAddress) ;		pcf8574Setup (int pinBase, int i2cAddress) ;
	The pinBase can be any number you like above 64 and the i2cAddress is the address of the device in the I2C bus – 0x38 is the default but they can change if you have multiple devices. Use the i2cdetect command (gpio i2cd) to probe your I2C bus to work out the right address to use.		#The pinBase can be any number you like above 64 and the i2cAddress is the address of the device in the I2C bus – 0x38 is the default but they can change if you have multiple devices.
			Use the i2cdetect command (gpio i2cd) to probe your I2C bus to work out the right address to use.

	You can call pcf8574Setup() as many times as needed for each PCF8754 you have in the system – just give it a different pin base and I2C bus address.		You can call pcf8574Setup() as many times as needed for each PCF8754 you have in the system – just give it a different pin base and I2C bus address.
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	</pre>		</pre>
	----		----

	==How to drive PCF8574 with I2C==		==How to drive PCF8574 with I2C==
	* Create a C file and compile it		* Create a C file and compile it

Yoyojacky: /* Purchase Links */

2016-09-23T06:37:35Z

Purchase Links

← Older revision		Revision as of 14:37, 23 September 2016
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	<code>gcc -o PCF8574 PCF8574.c -lbcm8574 </code><br>		<code>gcc -o PCF8574 PCF8574.c -lbcm8574 </code><br>
	<code>sudo ./PCF8574</code><br>		<code>sudo ./PCF8574</code><br>
	~~----~~
	~~==Purchase Links==~~
	~~[[File:shopping_car.png\|left\|21px]][http://www.52pi.com 52Pi Store]~~
	----		----

Yoyojacky: /* Purchase Links */

2016-08-02T09:36:07Z

Purchase Links

← Older revision		Revision as of 17:36, 2 August 2016
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	<code>sudo ./PCF8574</code><br>		<code>sudo ./PCF8574</code><br>
	----		----
	~~==Purchase Links==~~
	~~[[File:shopping_car.png\|left\|21px]][http://www.52pi.com 52Pi Store]~~
	~~----~~

	==Purchase Links==		==Purchase Links==
	[[File:shopping_car.png\|left\|21px]][http://www.52pi.com 52Pi Store]		[[File:shopping_car.png\|left\|21px]][http://www.52pi.com 52Pi Store]
	----		----

Yoyojacky: /* How to use */

2016-08-02T09:35:45Z

How to use

@@ Line 24: / Line 24: @@
 ----
 ==How to use==
-http://wiringpi.com/extensions/i2c-pcf8574/ 此处是教程,转载过来吧. 这里也有哦.http://www.52pi.net/forum.php?mod=viewthread&tid=745
+WiringPi supports an extension module for the PCF8574 8-bit GPIO expander IC.<br>
 ----
 ==Purchase Links==
 [[File:shopping_car.png|left|21px]][http://www.52pi.com  52Pi Store]
 ----

Yoyojacky: /* Presentation */

2016-08-02T09:17:38Z

Presentation

← Older revision		Revision as of 17:17, 2 August 2016
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	==Presentation==		==Presentation==
			[[File:Ep0013.jpg\|thumb\|left\|300px]]
	<br style="clear:both;" >		<br style="clear:both;" >
	----		----

	==Package includes==		==Package includes==
	* 1x RPI B+ to B GPIO Downgrade Board		* 1x RPI B+ to B GPIO Downgrade Board

Yoyojacky: /* Feature */

2016-08-02T09:15:56Z

Feature

← Older revision		Revision as of 17:15, 2 August 2016
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	==Feature==		==Feature==
	1)~~扩展IO~~		*1)Extend GPIO
	2)~~支持5V 3V电平~~		*2)Support both 5V and 3V power supply
	3)~~I2C总线~~		*3)Support I2C protocol
	4)Dimensions: 3.4cm × 4cm		*4)Dimensions: 3.4cm × 4cm
	----		----

Yoyojacky: /* Description */

2016-08-02T09:14:37Z

Description

← Older revision		Revision as of 17:14, 2 August 2016
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	=RPI I2C GPIO Extend Board=		=RPI I2C GPIO Extend Board=
	==Description==		==Description==
	~~此主板主芯片是PCF8574~~,~~可以提供8位GPIO,并且可以通过Jumper选择地址~~,~~以便级联最多8块这个样的主板.并且可以选择供电电压(~~5V 或者 3V).~~而且有效防止芯片过压导致原始树莓派IO烧毁~~.		There is a PCF8574 chip as main chip in this I2C GPIO extend board, it can offer 8bit GPIO and can select address by plugging a small jumper. <br>
	~~警告:在Pi 3上表现不良~~,~~主要是WiringPi的库不支持此芯片~~.		It can be connected with 8 same board, and you have a change to select the voltage in 5V and 3V. <br>
			It can prevent high voltage caused GPIO damage problem.<br>
			'''Warnning'''<br>
			DO NOT USE IT IN Raspberry Pi 3 B, Because of unsupported by wiringPi library.
	----		----

TaterLi: Created page with "=RPI I2C GPIO Extend Board= ==Description== 此主板主芯片是PCF8574,可以提供8位GPIO,并且可以通过Jumper选择地址,以便级联最多8块这个样的主板.并..."

2016-08-01T12:19:57Z

Created page with "=RPI I2C GPIO Extend Board= ==Description== 此主板主芯片是PCF8574,可以提供8位GPIO,并且可以通过Jumper选择地址,以便级联最多8块这个样的主板.并..."

New page

=RPI I2C GPIO Extend Board=
==Description==
此主板主芯片是PCF8574,可以提供8位GPIO,并且可以通过Jumper选择地址,以便级联最多8块这个样的主板.并且可以选择供电电压(5V 或者 3V).而且有效防止芯片过压导致原始树莓派IO烧毁.
警告:在Pi 3上表现不良,主要是WiringPi的库不支持此芯片.
----

==Feature==
1)扩展IO
2)支持5V 3V电平
3)I2C总线
4)Dimensions: 3.4cm × 4cm
----

==Presentation==
<br style="clear:both;" >
----
==Package includes==
* 1x RPI B+ to B GPIO Downgrade Board
----
==How to use==
http://wiringpi.com/extensions/i2c-pcf8574/ 此处是教程,转载过来吧. 这里也有哦.http://www.52pi.net/forum.php?mod=viewthread&tid=745
----
==Purchase Links==
[[File:shopping_car.png|left|21px]][http://www.52pi.com 52Pi Store]
----