Admin at 10:46, 4 February 2014

2014-02-04T10:46:37Z

2014-02-04T10:46:04Z

Admin: Created page with "= Action = Send data to an I2C-device. =
2013-02-11T18:29:28Z

Created page with "= Action = Send data to an I2C-device. = <spa..."

New page
= Action =

Send data to an I2C-device.

 

 

= Syntax =

I2CSEND slave, var

I2CSEND slave, var , bytes

 

 

= Syntax Xmega =

I2CSEND slave, var , #const

I2CSEND slave, var , bytes , #const

 

 

 

= Remarks =
<div style="padding: 0px; margin: 0px 0px 0px 4px;">
{| width="573" cellspacing="0" cellpadding="1" border="1" style="border: 2px solid rgb(0, 0, 0); border-spacing: 0px; border-collapse: collapse;"
|- style="vertical-align: top;"
| valign="top" width="14%" style="width: 76px; border: 1px solid rgb(0, 0, 0);" |
Slave

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The slave address off the I2C-device.

 

I2C uses a 7 bit address from bit 1 to bit 7. Bit 0 is used to specify a read/write operation. In BASCOM the byte transmission address is used for I2C.

This means that an I2C 7-bit address of 1 becomes &B10 = 2. And we say the address is 2. This is done so you can copy the address from the data sheets which are in the same format in most cases.

So if you work with 7 bit address, you need to multiply the address by 2.

|- style="vertical-align: top;"
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Var

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A byte, integer/word or numbers that holds the value, which will be, send to the I2C-device.

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Bytes

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The number of bytes to send.

|- style="vertical-align: top;"
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#const

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For the Xmega, a channel constant that was specified with OPEN.

|}
</div>
 

When an error occurs, the internal ERR variable will return 1. Otherwise it will be set to 0.

The I2CSEND statement combines the i2cstart,i2cwbyte and i2cstop statements.

For the xmega you can optional specify the channel. Without it, SPIC will be used.

 

 

 

= ASM =

The I2C routines are located in the i2c.lib/i2c.lbx files.

 

 

= See also =

[[I2CRECEIVE]] , [[I2CSTART]], [[I2CSTOP]] , [[I2CRBYTE]] , [[I2CWBYTE]]

 

 

= Example =

 <source lang="bascomavr">
Config Sda = Portb.5
Config Scl = Portb.7
Dim X As Byte , A As Byte , Bytes As Byte
X = 5 'assign variable to 5
Dim Ax(10)as Byte
Const Slave = &H40 'slave address of a PCF 8574 I/O IC
I2csend Slave , X 'send the value or

For A = 1 To 10
Ax(a) = A 'Fill dataspace
Next
Bytes = 10
I2csend Slave , Ax(1) , Bytes
End
</source> {{Languages}}

[[Category:BASCOM Language Reference]]

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 = <span class="f_Header">Action</span> =
-Send data to an I2C-device.
+Send address and data to an I2C-device.
 <span style="font-family: Arial;">&nbsp;</span>

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 For the xmega you can optional specify the channel. Without it, SPIC will be used.
-<span style="font-family: Arial;">&nbsp;</span>
 <span style="font-family: Arial;">&nbsp;</span>