ArmadeusWiki - User contributions [en]

I2C

2011-12-22T20:55:52Z

BernardBi: /* APF27_DEV I2C chips */

This page will summarize the informations to use the I2C bus on our boards.

==Overview==
The I2C bus is a simple & widely used two wires synchronous bus. It has been developped by [http://www.nxp.com Philips (now NXP)]. 
The standard frequency is 100kHz but 400kHz devices can be found (for example on the i.MX).
Single and multi masters are supported. Only the single master configuration will be discussed here.

The bus is based on two signals: SDA and SCL.
* SDA: bidirectional line for data
* SCL: unidirectional line for the clock (provided by the master)

Details can be found in the specification [http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf here.]

==Linux configuration==
By default the I2C bus is activated in the Armadeus distrib.
If you need to deactivate it, take a look at the linux menuconfig (make linux26-menuconfig)

==Linux user space C code==

Kernel source has a good documentation on using i2c bus through /dev with C program, it can be found [http://www.mjmwired.net/kernel/Documentation/i2c/dev-interface in kernel source directory Documentation/i2c/dev-interface].

You can find a sample code under ''target/packages/ch7024ctrl/'' of the Armadeus distribution ( [http://armadeus.svn.sourceforge.net/viewvc/armadeus/trunk/target/packages/ch7024ctrl/ or here through SF's SVN browsing] )

==Tested I2C chips==
* RTC: DS1327
* DAC: [[Max5821]]
* Video: [[TV_Output | CH7024]] [[DVI_/_HDMI|AD9889 & TFP410]]
* Misc: [[APF51 PMIC|WM8311]]
* EEPROM:

==APF27 I2C chips==

List of all hardware devices on APF27 I2C busses
:"I2C" and "I2C2" are the busses names from the iMX27 datasheet
:"I2C-0" and "I2C-1" are the corresponding linux device names

* I2C (I2C-0):
none

* I2C2 (I2C-1):
24AA02 Microchip Technology
256X8 EEPROM
I2C ADDRESS 0x50 to 0x57 (bits 0-2 are don't care)

==APF27_DEV I2C chips==

List of all hardware devices on APF27_DEV I2C busses
:"I2C" and "I2C2" are the busses names from the iMX27 datasheet
:"I2C-0" and "I2C-1" are the corresponding linux device names

* I2C (I2C-0):
DS1374 Dallas Semiconductors
32 bits time of day counter (1s increment)
I2C ADDRESS 0x68

MAX5821L MAXIM
Dual 10bits DAC
I2C ADDRESS 0x38

* I2C2 (I2C-1):
AD9889 Analog Devices
HDMI I/F
I2C ADDRESSES
* Main ctrl register 0x39
* Spare packet memory (31 bytes) 0x38 (default)
* EDID memory area (256 bytes) 0x3F (default)

==I2C bus logic 5v level adaptation (if necessary)==
if you want to use I2C devices which can not work with the I2C voltage of the APF board, a level translator has to be used, for example a PCA9306 from NXP:
* Connect pin 1 to the local GND
* Connect pin 2 to the local I2C iMX supply voltage
* Connect pin 3 to the SCL output of the APF
* Connect pin 4 to the SDA input/ouput of the APF
* Connect pin 7 and 8 together and the add a 200K resistor in parallel to a 100nF capacitor to GND
* Connect a pullup of 1.7K between your I2C device supply and the SCL line (pin 6)
* Connect a pullup of 1.7K between your I2C device supply and and the SDA line (pin 5)

For more details, take a look at the [http://www.nxp.com/acrobat_download/datasheets/PCA9306_2.pdf PCA9306 datasheet].
This chip is the one that can be mounted by users on the APF9328DevFull board.

As a low-cost alternative, a level shifter can be built with a pair of N-channel mosfets (such as a BS170). See the [http://www.nxp.com/acrobat_download/applicationnotes/AN97055.pdf Application Note 97055].

==Links==
* [http://mbouget.club.fr/i2c-faq.html Vincent Himpe I2C FAQ mirror]
* [http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf I2C specification]
* [http://www.lm-sensors.org/wiki/man/i2cset I2C Linux test tools of Lm-Sensors]
* [http://www.codesink.org/eeprog.html eeprog, a tool to program I2C EEPROMs]
* http://www.stlinux.com/docs/manual/distribution/distribution_guide6.php

[[Category:I2C]]

I2C

2011-12-22T20:55:32Z

BernardBi: /* APF27 I2C chips */

This page will summarize the informations to use the I2C bus on our boards.

==Overview==
The I2C bus is a simple & widely used two wires synchronous bus. It has been developped by [http://www.nxp.com Philips (now NXP)]. 
The standard frequency is 100kHz but 400kHz devices can be found (for example on the i.MX).
Single and multi masters are supported. Only the single master configuration will be discussed here.

The bus is based on two signals: SDA and SCL.
* SDA: bidirectional line for data
* SCL: unidirectional line for the clock (provided by the master)

Details can be found in the specification [http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf here.]

==Linux configuration==
By default the I2C bus is activated in the Armadeus distrib.
If you need to deactivate it, take a look at the linux menuconfig (make linux26-menuconfig)

==Linux user space C code==

Kernel source has a good documentation on using i2c bus through /dev with C program, it can be found [http://www.mjmwired.net/kernel/Documentation/i2c/dev-interface in kernel source directory Documentation/i2c/dev-interface].

You can find a sample code under ''target/packages/ch7024ctrl/'' of the Armadeus distribution ( [http://armadeus.svn.sourceforge.net/viewvc/armadeus/trunk/target/packages/ch7024ctrl/ or here through SF's SVN browsing] )

==Tested I2C chips==
* RTC: DS1327
* DAC: [[Max5821]]
* Video: [[TV_Output | CH7024]] [[DVI_/_HDMI|AD9889 & TFP410]]
* Misc: [[APF51 PMIC|WM8311]]
* EEPROM:

==APF27 I2C chips==

List of all hardware devices on APF27 I2C busses
:"I2C" and "I2C2" are the busses names from the iMX27 datasheet
:"I2C-0" and "I2C-1" are the corresponding linux device names

* I2C (I2C-0):
none

* I2C2 (I2C-1):
24AA02 Microchip Technology
256X8 EEPROM
I2C ADDRESS 0x50 to 0x57 (bits 0-2 are don't care)

==APF27_DEV I2C chips==

List of all hardware devices on APF27_DEV I2C busses
"I2C" and "I2C2" are the busses names from the iMX27 datasheet
"I2C-0" and "I2C-1" are the corresponding linux device names

* I2C (I2C-0):
DS1374 Dallas Semiconductors
32 bits time of day counter (1s increment)
I2C ADDRESS 0x68

MAX5821L MAXIM
Dual 10bits DAC
I2C ADDRESS 0x38

* I2C2 (I2C-1):
AD9889 Analog Devices
HDMI I/F
I2C ADDRESSES
* Main ctrl register 0x39
* Spare packet memory (31 bytes) 0x38 (default)
* EDID memory area (256 bytes) 0x3F (default)

==I2C bus logic 5v level adaptation (if necessary)==
if you want to use I2C devices which can not work with the I2C voltage of the APF board, a level translator has to be used, for example a PCA9306 from NXP:
* Connect pin 1 to the local GND
* Connect pin 2 to the local I2C iMX supply voltage
* Connect pin 3 to the SCL output of the APF
* Connect pin 4 to the SDA input/ouput of the APF
* Connect pin 7 and 8 together and the add a 200K resistor in parallel to a 100nF capacitor to GND
* Connect a pullup of 1.7K between your I2C device supply and the SCL line (pin 6)
* Connect a pullup of 1.7K between your I2C device supply and and the SDA line (pin 5)

For more details, take a look at the [http://www.nxp.com/acrobat_download/datasheets/PCA9306_2.pdf PCA9306 datasheet].
This chip is the one that can be mounted by users on the APF9328DevFull board.

As a low-cost alternative, a level shifter can be built with a pair of N-channel mosfets (such as a BS170). See the [http://www.nxp.com/acrobat_download/applicationnotes/AN97055.pdf Application Note 97055].

==Links==
* [http://mbouget.club.fr/i2c-faq.html Vincent Himpe I2C FAQ mirror]
* [http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf I2C specification]
* [http://www.lm-sensors.org/wiki/man/i2cset I2C Linux test tools of Lm-Sensors]
* [http://www.codesink.org/eeprog.html eeprog, a tool to program I2C EEPROMs]
* http://www.stlinux.com/docs/manual/distribution/distribution_guide6.php

[[Category:I2C]]

I2C

2011-12-22T20:52:47Z

BernardBi: /* APF27_DEV I2C chips */

This page will summarize the informations to use the I2C bus on our boards.

==Overview==
The I2C bus is a simple & widely used two wires synchronous bus. It has been developped by [http://www.nxp.com Philips (now NXP)]. 
The standard frequency is 100kHz but 400kHz devices can be found (for example on the i.MX).
Single and multi masters are supported. Only the single master configuration will be discussed here.

The bus is based on two signals: SDA and SCL.
* SDA: bidirectional line for data
* SCL: unidirectional line for the clock (provided by the master)

Details can be found in the specification [http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf here.]

==Linux configuration==
By default the I2C bus is activated in the Armadeus distrib.
If you need to deactivate it, take a look at the linux menuconfig (make linux26-menuconfig)

==Linux user space C code==

Kernel source has a good documentation on using i2c bus through /dev with C program, it can be found [http://www.mjmwired.net/kernel/Documentation/i2c/dev-interface in kernel source directory Documentation/i2c/dev-interface].

You can find a sample code under ''target/packages/ch7024ctrl/'' of the Armadeus distribution ( [http://armadeus.svn.sourceforge.net/viewvc/armadeus/trunk/target/packages/ch7024ctrl/ or here through SF's SVN browsing] )

==Tested I2C chips==
* RTC: DS1327
* DAC: [[Max5821]]
* Video: [[TV_Output | CH7024]] [[DVI_/_HDMI|AD9889 & TFP410]]
* Misc: [[APF51 PMIC|WM8311]]
* EEPROM:

==APF27 I2C chips==

List of all hardware devices on APF27 I2C busses
"I2C" and "I2C2" are the busses names from the iMX27 datasheet
"I2C-0" and "I2C-1" are the corresponding linux device names

* I2C (I2C-0):
none

* I2C2 (I2C-1):
24AA02 Microchip Technology
256X8 EEPROM
I2C ADDRESS 0x50 to 0x57 (bits 0-2 are don't care)

==APF27_DEV I2C chips==

List of all hardware devices on APF27_DEV I2C busses
"I2C" and "I2C2" are the busses names from the iMX27 datasheet
"I2C-0" and "I2C-1" are the corresponding linux device names

* I2C (I2C-0):
DS1374 Dallas Semiconductors
32 bits time of day counter (1s increment)
I2C ADDRESS 0x68

MAX5821L MAXIM
Dual 10bits DAC
I2C ADDRESS 0x38

* I2C2 (I2C-1):
AD9889 Analog Devices
HDMI I/F
I2C ADDRESSES
* Main ctrl register 0x39
* Spare packet memory (31 bytes) 0x38 (default)
* EDID memory area (256 bytes) 0x3F (default)

==I2C bus logic 5v level adaptation (if necessary)==
if you want to use I2C devices which can not work with the I2C voltage of the APF board, a level translator has to be used, for example a PCA9306 from NXP:
* Connect pin 1 to the local GND
* Connect pin 2 to the local I2C iMX supply voltage
* Connect pin 3 to the SCL output of the APF
* Connect pin 4 to the SDA input/ouput of the APF
* Connect pin 7 and 8 together and the add a 200K resistor in parallel to a 100nF capacitor to GND
* Connect a pullup of 1.7K between your I2C device supply and the SCL line (pin 6)
* Connect a pullup of 1.7K between your I2C device supply and and the SDA line (pin 5)

For more details, take a look at the [http://www.nxp.com/acrobat_download/datasheets/PCA9306_2.pdf PCA9306 datasheet].
This chip is the one that can be mounted by users on the APF9328DevFull board.

As a low-cost alternative, a level shifter can be built with a pair of N-channel mosfets (such as a BS170). See the [http://www.nxp.com/acrobat_download/applicationnotes/AN97055.pdf Application Note 97055].

==Links==
* [http://mbouget.club.fr/i2c-faq.html Vincent Himpe I2C FAQ mirror]
* [http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf I2C specification]
* [http://www.lm-sensors.org/wiki/man/i2cset I2C Linux test tools of Lm-Sensors]
* [http://www.codesink.org/eeprog.html eeprog, a tool to program I2C EEPROMs]
* http://www.stlinux.com/docs/manual/distribution/distribution_guide6.php

[[Category:I2C]]

I2C

2011-12-22T20:52:21Z

BernardBi: /* APF27 I2C chips */

This page will summarize the informations to use the I2C bus on our boards.

==Overview==
The I2C bus is a simple & widely used two wires synchronous bus. It has been developped by [http://www.nxp.com Philips (now NXP)]. 
The standard frequency is 100kHz but 400kHz devices can be found (for example on the i.MX).
Single and multi masters are supported. Only the single master configuration will be discussed here.

The bus is based on two signals: SDA and SCL.
* SDA: bidirectional line for data
* SCL: unidirectional line for the clock (provided by the master)

Details can be found in the specification [http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf here.]

==Linux configuration==
By default the I2C bus is activated in the Armadeus distrib.
If you need to deactivate it, take a look at the linux menuconfig (make linux26-menuconfig)

==Linux user space C code==

Kernel source has a good documentation on using i2c bus through /dev with C program, it can be found [http://www.mjmwired.net/kernel/Documentation/i2c/dev-interface in kernel source directory Documentation/i2c/dev-interface].

You can find a sample code under ''target/packages/ch7024ctrl/'' of the Armadeus distribution ( [http://armadeus.svn.sourceforge.net/viewvc/armadeus/trunk/target/packages/ch7024ctrl/ or here through SF's SVN browsing] )

==Tested I2C chips==
* RTC: DS1327
* DAC: [[Max5821]]
* Video: [[TV_Output | CH7024]] [[DVI_/_HDMI|AD9889 & TFP410]]
* Misc: [[APF51 PMIC|WM8311]]
* EEPROM:

==APF27 I2C chips==

List of all hardware devices on APF27 I2C busses
"I2C" and "I2C2" are the busses names from the iMX27 datasheet
"I2C-0" and "I2C-1" are the corresponding linux device names

* I2C (I2C-0):
none

* I2C2 (I2C-1):
24AA02 Microchip Technology
256X8 EEPROM
I2C ADDRESS 0x50 to 0x57 (bits 0-2 are don't care)

==APF27_DEV I2C chips==

List of all hardware devices on APF27_DEV I2C busses
I2C and I2C2 are the busses names from the iMX27 datasheet
I2C-0 and I2C-1 are the corresponding linux device names

* I2C (I2C-0):
DS1374 Dallas Semiconductors
32 bits time of day counter (1s increment)
I2C ADDRESS 0x68

MAX5821L MAXIM
Dual 10bits DAC
I2C ADDRESS 0x38

* I2C2 (I2C-1):
AD9889 Analog Devices
HDMI I/F
I2C ADDRESSES
* Main ctrl register 0x39
* Spare packet memory (31 bytes) 0x38 (default)
* EDID memory area (256 bytes) 0x3F (default)

==I2C bus logic 5v level adaptation (if necessary)==
if you want to use I2C devices which can not work with the I2C voltage of the APF board, a level translator has to be used, for example a PCA9306 from NXP:
* Connect pin 1 to the local GND
* Connect pin 2 to the local I2C iMX supply voltage
* Connect pin 3 to the SCL output of the APF
* Connect pin 4 to the SDA input/ouput of the APF
* Connect pin 7 and 8 together and the add a 200K resistor in parallel to a 100nF capacitor to GND
* Connect a pullup of 1.7K between your I2C device supply and the SCL line (pin 6)
* Connect a pullup of 1.7K between your I2C device supply and and the SDA line (pin 5)

For more details, take a look at the [http://www.nxp.com/acrobat_download/datasheets/PCA9306_2.pdf PCA9306 datasheet].
This chip is the one that can be mounted by users on the APF9328DevFull board.

As a low-cost alternative, a level shifter can be built with a pair of N-channel mosfets (such as a BS170). See the [http://www.nxp.com/acrobat_download/applicationnotes/AN97055.pdf Application Note 97055].

==Links==
* [http://mbouget.club.fr/i2c-faq.html Vincent Himpe I2C FAQ mirror]
* [http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf I2C specification]
* [http://www.lm-sensors.org/wiki/man/i2cset I2C Linux test tools of Lm-Sensors]
* [http://www.codesink.org/eeprog.html eeprog, a tool to program I2C EEPROMs]
* http://www.stlinux.com/docs/manual/distribution/distribution_guide6.php

[[Category:I2C]]

I2C

2011-12-22T20:40:51Z

BernardBi: /* APF27_DEV I2C chips */

This page will summarize the informations to use the I2C bus on our boards.

==Overview==
The I2C bus is a simple & widely used two wires synchronous bus. It has been developped by [http://www.nxp.com Philips (now NXP)]. 
The standard frequency is 100kHz but 400kHz devices can be found (for example on the i.MX).
Single and multi masters are supported. Only the single master configuration will be discussed here.

The bus is based on two signals: SDA and SCL.
* SDA: bidirectional line for data
* SCL: unidirectional line for the clock (provided by the master)

Details can be found in the specification [http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf here.]

==Linux configuration==
By default the I2C bus is activated in the Armadeus distrib.
If you need to deactivate it, take a look at the linux menuconfig (make linux26-menuconfig)

==Linux user space C code==

Kernel source has a good documentation on using i2c bus through /dev with C program, it can be found [http://www.mjmwired.net/kernel/Documentation/i2c/dev-interface in kernel source directory Documentation/i2c/dev-interface].

You can find a sample code under ''target/packages/ch7024ctrl/'' of the Armadeus distribution ( [http://armadeus.svn.sourceforge.net/viewvc/armadeus/trunk/target/packages/ch7024ctrl/ or here through SF's SVN browsing] )

==Tested I2C chips==
* RTC: DS1327
* DAC: [[Max5821]]
* Video: [[TV_Output | CH7024]] [[DVI_/_HDMI|AD9889 & TFP410]]
* Misc: [[APF51 PMIC|WM8311]]
* EEPROM:

==APF27 I2C chips==

List of all hardware devices on APF27 I2C busses
I2C and I2C2 are the busses names from the iMX27 datasheet
I2C-0 and I2C-1 are the corresponding linux device names

* I2C (I2C-0):
none

* I2C2 (I2C-1):
24AA02 Microchip Technology
256X8 EEPROM
I2C ADDRESS 0x50 to 0x57 (bits 0-2 are don't care)

==APF27_DEV I2C chips==

List of all hardware devices on APF27_DEV I2C busses
I2C and I2C2 are the busses names from the iMX27 datasheet
I2C-0 and I2C-1 are the corresponding linux device names

* I2C (I2C-0):
DS1374 Dallas Semiconductors
32 bits time of day counter (1s increment)
I2C ADDRESS 0x68

MAX5821L MAXIM
Dual 10bits DAC
I2C ADDRESS 0x38

* I2C2 (I2C-1):
AD9889 Analog Devices
HDMI I/F
I2C ADDRESSES
* Main ctrl register 0x39
* Spare packet memory (31 bytes) 0x38 (default)
* EDID memory area (256 bytes) 0x3F (default)

==I2C bus logic 5v level adaptation (if necessary)==
if you want to use I2C devices which can not work with the I2C voltage of the APF board, a level translator has to be used, for example a PCA9306 from NXP:
* Connect pin 1 to the local GND
* Connect pin 2 to the local I2C iMX supply voltage
* Connect pin 3 to the SCL output of the APF
* Connect pin 4 to the SDA input/ouput of the APF
* Connect pin 7 and 8 together and the add a 200K resistor in parallel to a 100nF capacitor to GND
* Connect a pullup of 1.7K between your I2C device supply and the SCL line (pin 6)
* Connect a pullup of 1.7K between your I2C device supply and and the SDA line (pin 5)

For more details, take a look at the [http://www.nxp.com/acrobat_download/datasheets/PCA9306_2.pdf PCA9306 datasheet].
This chip is the one that can be mounted by users on the APF9328DevFull board.

As a low-cost alternative, a level shifter can be built with a pair of N-channel mosfets (such as a BS170). See the [http://www.nxp.com/acrobat_download/applicationnotes/AN97055.pdf Application Note 97055].

==Links==
* [http://mbouget.club.fr/i2c-faq.html Vincent Himpe I2C FAQ mirror]
* [http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf I2C specification]
* [http://www.lm-sensors.org/wiki/man/i2cset I2C Linux test tools of Lm-Sensors]
* [http://www.codesink.org/eeprog.html eeprog, a tool to program I2C EEPROMs]
* http://www.stlinux.com/docs/manual/distribution/distribution_guide6.php

[[Category:I2C]]

I2C

2011-12-22T20:40:38Z

BernardBi: /* APF27_DEV I2C chips */

This page will summarize the informations to use the I2C bus on our boards.

==Overview==
The I2C bus is a simple & widely used two wires synchronous bus. It has been developped by [http://www.nxp.com Philips (now NXP)]. 
The standard frequency is 100kHz but 400kHz devices can be found (for example on the i.MX).
Single and multi masters are supported. Only the single master configuration will be discussed here.

The bus is based on two signals: SDA and SCL.
* SDA: bidirectional line for data
* SCL: unidirectional line for the clock (provided by the master)

Details can be found in the specification [http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf here.]

==Linux configuration==
By default the I2C bus is activated in the Armadeus distrib.
If you need to deactivate it, take a look at the linux menuconfig (make linux26-menuconfig)

==Linux user space C code==

Kernel source has a good documentation on using i2c bus through /dev with C program, it can be found [http://www.mjmwired.net/kernel/Documentation/i2c/dev-interface in kernel source directory Documentation/i2c/dev-interface].

You can find a sample code under ''target/packages/ch7024ctrl/'' of the Armadeus distribution ( [http://armadeus.svn.sourceforge.net/viewvc/armadeus/trunk/target/packages/ch7024ctrl/ or here through SF's SVN browsing] )

==Tested I2C chips==
* RTC: DS1327
* DAC: [[Max5821]]
* Video: [[TV_Output | CH7024]] [[DVI_/_HDMI|AD9889 & TFP410]]
* Misc: [[APF51 PMIC|WM8311]]
* EEPROM:

==APF27 I2C chips==

List of all hardware devices on APF27 I2C busses
I2C and I2C2 are the busses names from the iMX27 datasheet
I2C-0 and I2C-1 are the corresponding linux device names

* I2C (I2C-0):
none

* I2C2 (I2C-1):
24AA02 Microchip Technology
256X8 EEPROM
I2C ADDRESS 0x50 to 0x57 (bits 0-2 are don't care)

==APF27_DEV I2C chips==

List of all hardware devices on APF27 I2C busses
I2C and I2C2 are the busses names from the iMX27 datasheet
I2C-0 and I2C-1 are the corresponding linux device names

* I2C (I2C-0):
DS1374 Dallas Semiconductors
32 bits time of day counter (1s increment)
I2C ADDRESS 0x68

MAX5821L MAXIM
Dual 10bits DAC
I2C ADDRESS 0x38

* I2C2 (I2C-1):
AD9889 Analog Devices
HDMI I/F
I2C ADDRESSES
* Main ctrl register 0x39
* Spare packet memory (31 bytes) 0x38 (default)
* EDID memory area (256 bytes) 0x3F (default)

==I2C bus logic 5v level adaptation (if necessary)==
if you want to use I2C devices which can not work with the I2C voltage of the APF board, a level translator has to be used, for example a PCA9306 from NXP:
* Connect pin 1 to the local GND
* Connect pin 2 to the local I2C iMX supply voltage
* Connect pin 3 to the SCL output of the APF
* Connect pin 4 to the SDA input/ouput of the APF
* Connect pin 7 and 8 together and the add a 200K resistor in parallel to a 100nF capacitor to GND
* Connect a pullup of 1.7K between your I2C device supply and the SCL line (pin 6)
* Connect a pullup of 1.7K between your I2C device supply and and the SDA line (pin 5)

For more details, take a look at the [http://www.nxp.com/acrobat_download/datasheets/PCA9306_2.pdf PCA9306 datasheet].
This chip is the one that can be mounted by users on the APF9328DevFull board.

As a low-cost alternative, a level shifter can be built with a pair of N-channel mosfets (such as a BS170). See the [http://www.nxp.com/acrobat_download/applicationnotes/AN97055.pdf Application Note 97055].

==Links==
* [http://mbouget.club.fr/i2c-faq.html Vincent Himpe I2C FAQ mirror]
* [http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf I2C specification]
* [http://www.lm-sensors.org/wiki/man/i2cset I2C Linux test tools of Lm-Sensors]
* [http://www.codesink.org/eeprog.html eeprog, a tool to program I2C EEPROMs]
* http://www.stlinux.com/docs/manual/distribution/distribution_guide6.php

[[Category:I2C]]

I2C

2011-12-22T20:40:26Z

BernardBi: /* APF27 I2C chips */

This page will summarize the informations to use the I2C bus on our boards.

==Overview==
The I2C bus is a simple & widely used two wires synchronous bus. It has been developped by [http://www.nxp.com Philips (now NXP)]. 
The standard frequency is 100kHz but 400kHz devices can be found (for example on the i.MX).
Single and multi masters are supported. Only the single master configuration will be discussed here.

The bus is based on two signals: SDA and SCL.
* SDA: bidirectional line for data
* SCL: unidirectional line for the clock (provided by the master)

Details can be found in the specification [http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf here.]

==Linux configuration==
By default the I2C bus is activated in the Armadeus distrib.
If you need to deactivate it, take a look at the linux menuconfig (make linux26-menuconfig)

==Linux user space C code==

Kernel source has a good documentation on using i2c bus through /dev with C program, it can be found [http://www.mjmwired.net/kernel/Documentation/i2c/dev-interface in kernel source directory Documentation/i2c/dev-interface].

You can find a sample code under ''target/packages/ch7024ctrl/'' of the Armadeus distribution ( [http://armadeus.svn.sourceforge.net/viewvc/armadeus/trunk/target/packages/ch7024ctrl/ or here through SF's SVN browsing] )

==Tested I2C chips==
* RTC: DS1327
* DAC: [[Max5821]]
* Video: [[TV_Output | CH7024]] [[DVI_/_HDMI|AD9889 & TFP410]]
* Misc: [[APF51 PMIC|WM8311]]
* EEPROM:

==APF27 I2C chips==

List of all hardware devices on APF27 I2C busses
I2C and I2C2 are the busses names from the iMX27 datasheet
I2C-0 and I2C-1 are the corresponding linux device names

* I2C (I2C-0):
none

* I2C2 (I2C-1):
24AA02 Microchip Technology
256X8 EEPROM
I2C ADDRESS 0x50 to 0x57 (bits 0-2 are don't care)

==APF27_DEV I2C chips==
* I2C (I2C-0):
DS1374 Dallas Semiconductors
32 bits time of day counter (1s increment)
I2C ADDRESS 0x68

MAX5821L MAXIM
Dual 10bits DAC
I2C ADDRESS 0x38

* I2C2 (I2C-1):
AD9889 Analog Devices
HDMI I/F
I2C ADDRESSES
* Main ctrl register 0x39
* Spare packet memory (31 bytes) 0x38 (default)
* EDID memory area (256 bytes) 0x3F (default)

==I2C bus logic 5v level adaptation (if necessary)==
if you want to use I2C devices which can not work with the I2C voltage of the APF board, a level translator has to be used, for example a PCA9306 from NXP:
* Connect pin 1 to the local GND
* Connect pin 2 to the local I2C iMX supply voltage
* Connect pin 3 to the SCL output of the APF
* Connect pin 4 to the SDA input/ouput of the APF
* Connect pin 7 and 8 together and the add a 200K resistor in parallel to a 100nF capacitor to GND
* Connect a pullup of 1.7K between your I2C device supply and the SCL line (pin 6)
* Connect a pullup of 1.7K between your I2C device supply and and the SDA line (pin 5)

For more details, take a look at the [http://www.nxp.com/acrobat_download/datasheets/PCA9306_2.pdf PCA9306 datasheet].
This chip is the one that can be mounted by users on the APF9328DevFull board.

As a low-cost alternative, a level shifter can be built with a pair of N-channel mosfets (such as a BS170). See the [http://www.nxp.com/acrobat_download/applicationnotes/AN97055.pdf Application Note 97055].

==Links==
* [http://mbouget.club.fr/i2c-faq.html Vincent Himpe I2C FAQ mirror]
* [http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf I2C specification]
* [http://www.lm-sensors.org/wiki/man/i2cset I2C Linux test tools of Lm-Sensors]
* [http://www.codesink.org/eeprog.html eeprog, a tool to program I2C EEPROMs]
* http://www.stlinux.com/docs/manual/distribution/distribution_guide6.php

[[Category:I2C]]

I2C

2011-12-22T20:32:49Z

BernardBi: /* APF27_DEV I2C chips */

This page will summarize the informations to use the I2C bus on our boards.

==Overview==
The I2C bus is a simple & widely used two wires synchronous bus. It has been developped by [http://www.nxp.com Philips (now NXP)]. 
The standard frequency is 100kHz but 400kHz devices can be found (for example on the i.MX).
Single and multi masters are supported. Only the single master configuration will be discussed here.

The bus is based on two signals: SDA and SCL.
* SDA: bidirectional line for data
* SCL: unidirectional line for the clock (provided by the master)

Details can be found in the specification [http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf here.]

==Linux configuration==
By default the I2C bus is activated in the Armadeus distrib.
If you need to deactivate it, take a look at the linux menuconfig (make linux26-menuconfig)

==Linux user space C code==

Kernel source has a good documentation on using i2c bus through /dev with C program, it can be found [http://www.mjmwired.net/kernel/Documentation/i2c/dev-interface in kernel source directory Documentation/i2c/dev-interface].

You can find a sample code under ''target/packages/ch7024ctrl/'' of the Armadeus distribution ( [http://armadeus.svn.sourceforge.net/viewvc/armadeus/trunk/target/packages/ch7024ctrl/ or here through SF's SVN browsing] )

==Tested I2C chips==
* RTC: DS1327
* DAC: [[Max5821]]
* Video: [[TV_Output | CH7024]] [[DVI_/_HDMI|AD9889 & TFP410]]
* Misc: [[APF51 PMIC|WM8311]]
* EEPROM:

==APF27 I2C chips==
* I2C (I2C-0):
none

* I2C2 (I2C-1):
24AA02 Microchip Technology
256X8 EEPROM
I2C ADDRESS 0x50 to 0x57 (bits 0-2 are don't care)

==APF27_DEV I2C chips==
* I2C (I2C-0):
DS1374 Dallas Semiconductors
32 bits time of day counter (1s increment)
I2C ADDRESS 0x68

MAX5821L MAXIM
Dual 10bits DAC
I2C ADDRESS 0x38

* I2C2 (I2C-1):
AD9889 Analog Devices
HDMI I/F
I2C ADDRESSES
* Main ctrl register 0x39
* Spare packet memory (31 bytes) 0x38 (default)
* EDID memory area (256 bytes) 0x3F (default)

==I2C bus logic 5v level adaptation (if necessary)==
if you want to use I2C devices which can not work with the I2C voltage of the APF board, a level translator has to be used, for example a PCA9306 from NXP:
* Connect pin 1 to the local GND
* Connect pin 2 to the local I2C iMX supply voltage
* Connect pin 3 to the SCL output of the APF
* Connect pin 4 to the SDA input/ouput of the APF
* Connect pin 7 and 8 together and the add a 200K resistor in parallel to a 100nF capacitor to GND
* Connect a pullup of 1.7K between your I2C device supply and the SCL line (pin 6)
* Connect a pullup of 1.7K between your I2C device supply and and the SDA line (pin 5)

For more details, take a look at the [http://www.nxp.com/acrobat_download/datasheets/PCA9306_2.pdf PCA9306 datasheet].
This chip is the one that can be mounted by users on the APF9328DevFull board.

As a low-cost alternative, a level shifter can be built with a pair of N-channel mosfets (such as a BS170). See the [http://www.nxp.com/acrobat_download/applicationnotes/AN97055.pdf Application Note 97055].

==Links==
* [http://mbouget.club.fr/i2c-faq.html Vincent Himpe I2C FAQ mirror]
* [http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf I2C specification]
* [http://www.lm-sensors.org/wiki/man/i2cset I2C Linux test tools of Lm-Sensors]
* [http://www.codesink.org/eeprog.html eeprog, a tool to program I2C EEPROMs]
* http://www.stlinux.com/docs/manual/distribution/distribution_guide6.php

[[Category:I2C]]

I2C

2011-12-22T20:31:39Z

BernardBi: Added I2C devices list for APF27_DEV

This page will summarize the informations to use the I2C bus on our boards.

==Overview==
The I2C bus is a simple & widely used two wires synchronous bus. It has been developped by [http://www.nxp.com Philips (now NXP)]. 
The standard frequency is 100kHz but 400kHz devices can be found (for example on the i.MX).
Single and multi masters are supported. Only the single master configuration will be discussed here.

The bus is based on two signals: SDA and SCL.
* SDA: bidirectional line for data
* SCL: unidirectional line for the clock (provided by the master)

Details can be found in the specification [http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf here.]

==Linux configuration==
By default the I2C bus is activated in the Armadeus distrib.
If you need to deactivate it, take a look at the linux menuconfig (make linux26-menuconfig)

==Linux user space C code==

Kernel source has a good documentation on using i2c bus through /dev with C program, it can be found [http://www.mjmwired.net/kernel/Documentation/i2c/dev-interface in kernel source directory Documentation/i2c/dev-interface].

You can find a sample code under ''target/packages/ch7024ctrl/'' of the Armadeus distribution ( [http://armadeus.svn.sourceforge.net/viewvc/armadeus/trunk/target/packages/ch7024ctrl/ or here through SF's SVN browsing] )

==Tested I2C chips==
* RTC: DS1327
* DAC: [[Max5821]]
* Video: [[TV_Output | CH7024]] [[DVI_/_HDMI|AD9889 & TFP410]]
* Misc: [[APF51 PMIC|WM8311]]
* EEPROM:

==APF27 I2C chips==
* I2C (I2C-0):
none

* I2C2 (I2C-1):
24AA02 Microchip Technology
256X8 EEPROM
I2C ADDRESS 0x50 to 0x57 (bits 0-2 are don't care)

==APF27_DEV I2C chips==
* I2C (I2C-0):
DS1374 Dallas Semiconductors
32 bits time of day counter (1s increment)
I2C ADDRESS 0x68

MAX5821L MAXIM
Dual 10bits DAC
I2C ADDRESS 0x38

* I2C2 (I2C-1):
AD9889 Analog Devices
HDMI I/F
I2C ADDRESSES
* Main ctrl register 0x39
* Spare packet memory (31 bytes) 0x38 (default)
* EDID memory area 0x3F (default)

==I2C bus logic 5v level adaptation (if necessary)==
if you want to use I2C devices which can not work with the I2C voltage of the APF board, a level translator has to be used, for example a PCA9306 from NXP:
* Connect pin 1 to the local GND
* Connect pin 2 to the local I2C iMX supply voltage
* Connect pin 3 to the SCL output of the APF
* Connect pin 4 to the SDA input/ouput of the APF
* Connect pin 7 and 8 together and the add a 200K resistor in parallel to a 100nF capacitor to GND
* Connect a pullup of 1.7K between your I2C device supply and the SCL line (pin 6)
* Connect a pullup of 1.7K between your I2C device supply and and the SDA line (pin 5)

For more details, take a look at the [http://www.nxp.com/acrobat_download/datasheets/PCA9306_2.pdf PCA9306 datasheet].
This chip is the one that can be mounted by users on the APF9328DevFull board.

As a low-cost alternative, a level shifter can be built with a pair of N-channel mosfets (such as a BS170). See the [http://www.nxp.com/acrobat_download/applicationnotes/AN97055.pdf Application Note 97055].

==Links==
* [http://mbouget.club.fr/i2c-faq.html Vincent Himpe I2C FAQ mirror]
* [http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf I2C specification]
* [http://www.lm-sensors.org/wiki/man/i2cset I2C Linux test tools of Lm-Sensors]
* [http://www.codesink.org/eeprog.html eeprog, a tool to program I2C EEPROMs]
* http://www.stlinux.com/docs/manual/distribution/distribution_guide6.php

[[Category:I2C]]

I2C

2011-12-22T19:48:50Z

BernardBi: /* APF27 I2C chips */

This page will summarize the informations to use the I2C bus on our boards.

==Overview==
The I2C bus is a simple & widely used two wires synchronous bus. It has been developped by [http://www.nxp.com Philips (now NXP)]. 
The standard frequency is 100kHz but 400kHz devices can be found (for example on the i.MX).
Single and multi masters are supported. Only the single master configuration will be discussed here.

The bus is based on two signals: SDA and SCL.
* SDA: bidirectional line for data
* SCL: unidirectional line for the clock (provided by the master)

Details can be found in the specification [http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf here.]

==Linux configuration==
By default the I2C bus is activated in the Armadeus distrib.
If you need to deactivate it, take a look at the linux menuconfig (make linux26-menuconfig)

==Linux user space C code==

Kernel source has a good documentation on using i2c bus through /dev with C program, it can be found [http://www.mjmwired.net/kernel/Documentation/i2c/dev-interface in kernel source directory Documentation/i2c/dev-interface].

You can find a sample code under ''target/packages/ch7024ctrl/'' of the Armadeus distribution ( [http://armadeus.svn.sourceforge.net/viewvc/armadeus/trunk/target/packages/ch7024ctrl/ or here through SF's SVN browsing] )

==Tested I2C chips==
* RTC: DS1327
* DAC: [[Max5821]]
* Video: [[TV_Output | CH7024]] [[DVI_/_HDMI|AD9889 & TFP410]]
* Misc: [[APF51 PMIC|WM8311]]
* EEPROM:

==APF27 I2C chips==
* I2C (I2C-0):
none

* I2C2 (I2C-1):
24AA02 Microchip Technology
256X8 EEPROM
I2C ADDRESS 0x50 to 0x57 (bits 0-2 are don't care)

==I2C bus logic 5v level adaptation (if necessary)==
if you want to use I2C devices which can not work with the I2C voltage of the APF board, a level translator has to be used, for example a PCA9306 from NXP:
* Connect pin 1 to the local GND
* Connect pin 2 to the local I2C iMX supply voltage
* Connect pin 3 to the SCL output of the APF
* Connect pin 4 to the SDA input/ouput of the APF
* Connect pin 7 and 8 together and the add a 200K resistor in parallel to a 100nF capacitor to GND
* Connect a pullup of 1.7K between your I2C device supply and the SCL line (pin 6)
* Connect a pullup of 1.7K between your I2C device supply and and the SDA line (pin 5)

For more details, take a look at the [http://www.nxp.com/acrobat_download/datasheets/PCA9306_2.pdf PCA9306 datasheet].
This chip is the one that can be mounted by users on the APF9328DevFull board.

As a low-cost alternative, a level shifter can be built with a pair of N-channel mosfets (such as a BS170). See the [http://www.nxp.com/acrobat_download/applicationnotes/AN97055.pdf Application Note 97055].

==Links==
* [http://mbouget.club.fr/i2c-faq.html Vincent Himpe I2C FAQ mirror]
* [http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf I2C specification]
* [http://www.lm-sensors.org/wiki/man/i2cset I2C Linux test tools of Lm-Sensors]
* [http://www.codesink.org/eeprog.html eeprog, a tool to program I2C EEPROMs]
* http://www.stlinux.com/docs/manual/distribution/distribution_guide6.php

[[Category:I2C]]

I2C

2011-12-22T19:48:12Z

BernardBi: Added APF27 I2C bus devices information

This page will summarize the informations to use the I2C bus on our boards.

==Overview==
The I2C bus is a simple & widely used two wires synchronous bus. It has been developped by [http://www.nxp.com Philips (now NXP)]. 
The standard frequency is 100kHz but 400kHz devices can be found (for example on the i.MX).
Single and multi masters are supported. Only the single master configuration will be discussed here.

The bus is based on two signals: SDA and SCL.
* SDA: bidirectional line for data
* SCL: unidirectional line for the clock (provided by the master)

Details can be found in the specification [http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf here.]

==Linux configuration==
By default the I2C bus is activated in the Armadeus distrib.
If you need to deactivate it, take a look at the linux menuconfig (make linux26-menuconfig)

==Linux user space C code==

Kernel source has a good documentation on using i2c bus through /dev with C program, it can be found [http://www.mjmwired.net/kernel/Documentation/i2c/dev-interface in kernel source directory Documentation/i2c/dev-interface].

You can find a sample code under ''target/packages/ch7024ctrl/'' of the Armadeus distribution ( [http://armadeus.svn.sourceforge.net/viewvc/armadeus/trunk/target/packages/ch7024ctrl/ or here through SF's SVN browsing] )

==Tested I2C chips==
* RTC: DS1327
* DAC: [[Max5821]]
* Video: [[TV_Output | CH7024]] [[DVI_/_HDMI|AD9889 & TFP410]]
* Misc: [[APF51 PMIC|WM8311]]
* EEPROM:

==APF27 I2C chips==
* I2C (I2C-0): - none

* I2C2 (I2C-1): - 24AA02 Microchip Technology
256X8 EEPROM
I2C ADDRESS 0x50 to 0x57 (bits 0-2 are don't care)

==I2C bus logic 5v level adaptation (if necessary)==
if you want to use I2C devices which can not work with the I2C voltage of the APF board, a level translator has to be used, for example a PCA9306 from NXP:
* Connect pin 1 to the local GND
* Connect pin 2 to the local I2C iMX supply voltage
* Connect pin 3 to the SCL output of the APF
* Connect pin 4 to the SDA input/ouput of the APF
* Connect pin 7 and 8 together and the add a 200K resistor in parallel to a 100nF capacitor to GND
* Connect a pullup of 1.7K between your I2C device supply and the SCL line (pin 6)
* Connect a pullup of 1.7K between your I2C device supply and and the SDA line (pin 5)

For more details, take a look at the [http://www.nxp.com/acrobat_download/datasheets/PCA9306_2.pdf PCA9306 datasheet].
This chip is the one that can be mounted by users on the APF9328DevFull board.

As a low-cost alternative, a level shifter can be built with a pair of N-channel mosfets (such as a BS170). See the [http://www.nxp.com/acrobat_download/applicationnotes/AN97055.pdf Application Note 97055].

==Links==
* [http://mbouget.club.fr/i2c-faq.html Vincent Himpe I2C FAQ mirror]
* [http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf I2C specification]
* [http://www.lm-sensors.org/wiki/man/i2cset I2C Linux test tools of Lm-Sensors]
* [http://www.codesink.org/eeprog.html eeprog, a tool to program I2C EEPROMs]
* http://www.stlinux.com/docs/manual/distribution/distribution_guide6.php

[[Category:I2C]]

I2C

2011-12-19T19:36:40Z

BernardBi: /* Links */ updated http://www.codesink.org/eeprog.html link

This page will summarize the informations to use the I2C bus on our boards.

==Overview==
The I2C bus is a simple & widely used two wires synchronous bus. It has been developped by [http://www.nxp.com Philips (now NXP)]. 
The standard frequency is 100kHz but 400kHz devices can be found (for example on the i.MX).
Single and multi masters are supported. Only the single master configuration will be discussed here.

The bus is based on two signals: SDA and SCL.
* SDA: bidirectional line for data
* SCL: unidirectional line for the clock (provided by the master)

Details can be found in the specification [http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf here.]

==Linux configuration==
By default the I2C bus is activated in the Armadeus distrib.
If you need to deactivate it, take a look at the linux menuconfig (make linux26-menuconfig)

==Linux user space C code==

Kernel source has a good documentation on using i2c bus through /dev with C program, it can be found [http://www.mjmwired.net/kernel/Documentation/i2c/dev-interface in kernel source directory Documentation/i2c/dev-interface].

You can find a sample code under ''target/packages/ch7024ctrl/'' of the Armadeus distribution ( [http://armadeus.svn.sourceforge.net/viewvc/armadeus/trunk/target/packages/ch7024ctrl/ or here through SF's SVN browsing] )

==Tested I2C chips==
* RTC: DS1327
* DAC: [[Max5821]]
* Video: [[TV_Output | CH7024]] [[DVI_/_HDMI|AD9889 & TFP410]]
* Misc: [[APF51 PMIC|WM8311]]
* EEPROM:

==I2C bus logic 5v level adaptation (if necessary)==
if you want to use I2C devices which can not work with the I2C voltage of the APF board, a level translator has to be used, for example a PCA9306 from NXP:
* Connect pin 1 to the local GND
* Connect pin 2 to the local I2C iMX supply voltage
* Connect pin 3 to the SCL output of the APF
* Connect pin 4 to the SDA input/ouput of the APF
* Connect pin 7 and 8 together and the add a 200K resistor in parallel to a 100nF capacitor to GND
* Connect a pullup of 1.7K between your I2C device supply and the SCL line (pin 6)
* Connect a pullup of 1.7K between your I2C device supply and and the SDA line (pin 5)

For more details, take a look at the [http://www.nxp.com/acrobat_download/datasheets/PCA9306_2.pdf PCA9306 datasheet].
This chip is the one that can be mounted by users on the APF9328DevFull board.

As a low-cost alternative, a level shifter can be built with a pair of N-channel mosfets (such as a BS170). See the [http://www.nxp.com/acrobat_download/applicationnotes/AN97055.pdf Application Note 97055].

==Links==
* [http://mbouget.club.fr/i2c-faq.html Vincent Himpe I2C FAQ mirror]
* [http://www.nxp.com/acrobat_download/literature/9398/39340011.pdf I2C specification]
* [http://www.lm-sensors.org/wiki/man/i2cset I2C Linux test tools of Lm-Sensors]
* [http://www.codesink.org/eeprog.html eeprog, a tool to program I2C EEPROMs]
* http://www.stlinux.com/docs/manual/distribution/distribution_guide6.php

[[Category:I2C]]