I2c library for C - Revision history

Daniel at 13:21, 20 November 2015

2015-11-20T13:21:47Z

Daniel: /* Usage */

2015-11-20T12:50:57Z

‎Usage

Daniel at 14:44, 11 November 2015

2015-11-11T14:44:17Z

Daniel: /* Combined Write/Read */

2015-11-11T14:43:21Z

‎Combined Write/Read

Daniel at 13:37, 11 November 2015

2015-11-11T13:37:39Z

Daniel: Created page with "This library was created to make communication with I2C devices from C language. Up to know it has work fine for in Raspberry Pi boards (and similar ones!). Download: File..."

2015-10-22T17:27:36Z

Created page with "This library was created to make communication with I2C devices from C language. Up to know it has work fine for in Raspberry Pi boards (and similar ones!). Download: File..."

New page

This library was created to make communication with I2C devices from C language. Up to know it has work fine for in Raspberry Pi boards (and similar ones!).

Download: [[File:i2c-driver.tar.gz]]

← Older revision		Revision as of 13:21, 20 November 2015
Line 61:		Line 61:

	= Example =		= Example =
		+
		+	<syntaxhighlight lang="c">
		+	struct i2c_dev my_dev;
		+
		+	my_dev.tba = 0;
		+	my_dev.addr = addr;
		+
		+	//i2c_adapter is 0 or 1 in Raspberry Pi, depending on the model
		+	i2c_dev_open(&my_dev, i2c_adapter);
		+
		+	...
		+
		+	i2c_dev_close(&my_dev);
		+	</syntaxhighlight>

← Older revision		Revision as of 12:50, 20 November 2015
Line 4:		Line 4:

	= Usage =		= Usage =
		+
		+	All the function calls of this library need a <tt>i2c_dev</tt> structure holding the configuration information.
		+
		+	<syntaxhighlight lang="c">
		+	struct i2c_dev {
		+	int fd;
		+	uint16_t addr;
		+	int tba;
		+	};
		+	</syntaxhighlight>
		+
		+	Before any call to the library we have to set-up the I2C device address in the <tt>i2c_dev</tt> structure. The field <tt>tba</tt> allows the user to choose between 7-bit or 10-bit I2C addresses ("tba" stands for Ten Bit Address); a 0 value in <tt>tba</tt> selects 7-bit addressing, any other value selects 10-bit addressing. The address of the I2C device should be written in the <tt>addr</tt> field.
		+
		+	Then the provided functions in the library can be called. The first function to be called has to be <tt>i2c_dev_open</tt> to open the device descriptor and the last one, after its use the function <tt>i2c_dev_close</tt> has to be called to close the descriptor and clean the used data structures.

	<syntaxhighlight lang="c">		<syntaxhighlight lang="c">

@@ Line 5: / Line 5: @@
 = Usage =
-<syntaxhighlight lang="cpp">
+<syntaxhighlight lang="c">
 int i2c_dev_open(struct i2c_dev *dev, int adapter);
 int i2c_dev_close(struct i2c_dev *dev);
@@ Line 15: / Line 15: @@
 === Set Up I2C device ===
-<syntaxhighlight lang="cpp">
+<syntaxhighlight lang="c">
 int i2c_dev_open(struct i2c_dev *dev, int adapter);
 </syntaxhighlight>
 === Close I2C device ===
-<syntaxhighlight lang="cpp">
+<syntaxhighlight lang="c">
 int i2c_dev_close(struct i2c_dev *dev);
 </syntaxhighlight>
 === Write to device ===
-<syntaxhighlight lang="cpp">
+<syntaxhighlight lang="c">
 int i2c_dev_write(struct i2c_dev *dev, uint8_t *buf, int n);
 </syntaxhighlight>
 === Read from device ===
-<syntaxhighlight lang="cpp">
+<syntaxhighlight lang="c">
 int i2c_dev_read(struct i2c_dev *dev, uint8_t *buf, int n);
 </syntaxhighlight>
 === Combined Write/Read ===
-<syntaxhighlight lang="cpp">
+<syntaxhighlight lang="c">
 int i2c_dev_wrrs(struct i2c_dev *dev, uint8_t *wbuf, int wn, uint8_t *rbuf, int rn);
 </syntaxhighlight>

@@ Line 39: / Line 39: @@
 int i2c_dev_wrrs(struct i2c_dev *dev, uint8_t *wbuf, int wn, uint8_t *rbuf, int rn);
 </syntaxhighlight>
 = Example =

← Older revision		Revision as of 13:37, 11 November 2015
Line 2:		Line 2:

	Download: [[File:i2c-driver.tar.gz]]		Download: [[File:i2c-driver.tar.gz]]
		+
		+	= Usage =
		+
		+	<syntaxhighlight lang="cpp">
		+	int i2c_dev_open(struct i2c_dev *dev, int adapter);
		+	int i2c_dev_close(struct i2c_dev *dev);
		+
		+	int i2c_dev_write(struct i2c_dev dev, uint8_t buf, int n);
		+	int i2c_dev_read(struct i2c_dev dev, uint8_t buf, int n);
		+	int i2c_dev_wrrs(struct i2c_dev dev, uint8_t wbuf, int wn, uint8_t *rbuf, int rn);
		+	</syntaxhighlight>
		+
		+	=== Set Up I2C device ===
		+	<syntaxhighlight lang="cpp">
		+	int i2c_dev_open(struct i2c_dev *dev, int adapter);
		+	</syntaxhighlight>
		+
		+	=== Close I2C device ===
		+	<syntaxhighlight lang="cpp">
		+	int i2c_dev_close(struct i2c_dev *dev);
		+	</syntaxhighlight>
		+
		+	=== Write to device ===
		+	<syntaxhighlight lang="cpp">
		+	int i2c_dev_write(struct i2c_dev dev, uint8_t buf, int n);
		+	</syntaxhighlight>
		+
		+
		+	=== Read from device ===
		+	<syntaxhighlight lang="cpp">
		+	int i2c_dev_read(struct i2c_dev dev, uint8_t buf, int n);
		+	</syntaxhighlight>
		+
		+	=== Combined Write/Read ===
		+	<syntaxhighlight lang="cpp">
		+	int i2c_dev_wrrs(struct i2c_dev dev, uint8_t wbuf, int wn, uint8_t *rbuf, int rn);
		+	</syntaxhighlight>
		+
		+	= Example =