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= Overview =
This How-To wiki is meant to be a starting point for people to learn configure mux for IGEP devices as quickly and easily as possible. For this how-This wiki contains:<br> *Mux characteristics summary*Tips to avoid problems*Ways to i used configure mux*Tables that links peripherals and connectors for IGEPv2 and IGEP MODULE There are three ways to configure mux in IGEP Boards based in OMAP35xx and DM37xx:<br> *[[Mux_instructions|Configuring MUX from OS User Space]]. This mode has a issue, when your system reboot or shutdown you will need to configure again. [[http://releasesHow to set up UART2 in J990#First_way|Example]].linaro*Configuring MUX by using kernel commandline buddies.org/platform/linaro-m/headless/final/linaro-m-headless-tar-20101108-This way is not avaliable in some cases. [[How to set up UART2 in J990#Second_way|Example]] and [[Linux Kernel 2.tar6.37.gz Linaro Headlessy#Kernel_Parameters|buddies parametres] ].<br> *Editing and Ubuntu 10compile kernel sources.04 with Linaro Toolchain[[How to set up UART2 in J990#Third_way|Example]]. <br> = Introduction =
Mux (or multiplexer) is a Omap peripheral that can be controlled via software. Its function is connect other peripherals to some available Omap pins.
• '''Wake-up''' bits (2 bits):
->WAKEUPENABLE: Enable wake-up detection on input. It is also the off mode input enable value.<br> ->WAKEUPEVENT: Wake-up event status for the pin.'''<br>'''
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=== Mode selection ===
The next table shows all capabilities.<br>
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'''Mode 0''' is the primary mode. When mode 0 is set, the function mapped to the pin corresponds to the name of the pin. In IGEP some pads don't use primary mode by default.
'''Mode 1 to mode 6''' are possible modes for alternate functions. On each pin, some modes are used effectively for alternate functions, while other modes are unused and correspond to no functional configuration.
'''The safe mode (default mode 7) '''avoids any risk of electrical contention by configuring the pin as an input with no functional interface mapped to it. '''The safe mode is used mainly as the default mode for all pins containing no mandatory interface at the release of power-on reset.'''<br>
=== Pull Selection ===
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| Pull-up selected and activated if pin is NOT configured as OUTPUT
|}
When a pin is in output mode, pulls are automatically disable.
=== Input Enable ===
INPUTENABLE = 0: Input Disable. Pin is configured in output only mode.
INPUTENABLE = 1: Input Enable. Pin is configured in bidirectional mode. NOTE: For proper functioning of some peripherals INPUTENABLE must be set to 1 for pads configured to drive output clocks: SDRC, GPMC, McSPIi, I2Ci, MMCi, McBSPi, HSUSB HOST. <br>
=== '''Off mode values''' and '''Wake-up''' ===
Please contribute.
[http://www.ti.com/generallit/docsug/litspruf98x/getliteraturespruf98x.tsp?literatureNumber=spruf98v&fileType=pdf More information] about mux. = Available peripherals on external connector = Use the next tables to change mux configuration as you need. First column shows all avaliable peripherals and first row shows all avaliable connectors. There are some connectors than have more peripherals, but they don't have all pads avaliable to use it. For example: MMC3 in J990. === Important tips<br> ===
{| cellspacing="1" cellpadding="1" border="1" style="width: 823px933px; height: 190px409px;"
|-
| <br>
| [[Connectors Summary#JC30_connector|JC30]]
| [[Connectors Summary#JA42_connector|JA42]]
| [[Connectors Summary#JA41_connector|JA41]] | [http://en.wikipedia.org/wiki/Test_point TP]
|-
| [[Peripherals Summary#UART|UART1]]
| No
| Yes, not default configuration ([[Mux instructions#UART1_in_J990UART1_in_J960|Yes: disable RS485]] | No )
| No
| No
| No
| No
| No<br>Yes, not default configuration ([[Mux_instructions#TFP410|disable DVI]])
|-
| [[Peripherals Summary#UART|UART2]]
| Yes, not default configuration ([[How to set up UART2 in J990|Yes: disable BTBluetooth]] )
|
[[Mux instructions#Bluetooth|disable BTBluetooth]]
| No
| No
| [[Peripherals Summary#UART|UART3]]
| No
| Yes: , default configuration ([[Mux instructions#UART3_in_J960| No Serial debug]])
| No
| No
| No
| No
| NoYes, not default configuration ([[Mux_instructions#TFP410|disable DVI]])
|-
| [[Peripherals Summary#UART|UART4]]
| No
| No
|-
| [[Peripherals Summary#GPIO|GPIO]]
| Yes, default configuration ([[Mux instructions#GPIO_in_J990|Yes: not defaultinfo]]<br> )
| No
| No
| Yes, not default configuration ([[Mux instructions#GPIO_in_JTAGGPIO_in_J990|Yes: not defaultdisable JTAG]] ) | [[Mux instructions#GPIO_in_JC30|Yes: , default]] configuration | [[Mux instructions#GPIO_in_JA42|Yes: not , default]] configuration | [[Mux instructions#GPIO_in_JA41|Yes: , not default]]<br> | configuration ([[Mux instructionsMux_instructions#GPIO_in_TPTFP410|Yesdisable DVI]])
|-
| [[Peripherals Summary#SPI|McSPI1]]
| No
| No
| No
| No
| No
| Yes, default configuration
| No
|-
| [[Peripherals Summary#SPI|McSPI2]]
| No
| No
| [[Peripherals Summary#SPI|McSPI3]]
|
Yes: dissable , not default configuration ([[Mux instructions#WIFI |disable WIFI]])
| No
| No
| No
| No Yes, not default configuration ([[Mux_instructions#TFP410| Nodisable DVI]])<br>
|-
| [[Peripherals Summary#SPI|McSPI4]]
| Yes: , not default configuration ([[Mux instructions#GPIO_in_J990|disable McBSP1<br> | No GPIOs]])
| No
| No
|-
| [[Peripherals Summary#BSP|McBSP1]]
| Yes: , not default configuration ([[Mux instructions#GPIO_in_J990| No disable GPIOs]])
| No
| No
|-
| [[Peripherals Summary#BSP|McBSP2]]
| No
| No
|-
| [[Peripherals Summary#BSP|McBSP3]]
| Yes: BT , default configuration ([[Mux instructions#TP65950_PCM_VSP|Bluetooth audio | No ]])
| No
| No
| No
| No
| Yes: , not default<br> configuration ([[Mux instructions#GPIO_in_J990| No disable GPIOs]])
| No
|-
| [[Peripherals Summary#BSP|McBSP5]]
| No
| No
|-
| [[Peripherals Summary#MMC|MMC1]]
| No
| No
|-
| [[Peripherals Summary#MMC|MMC2]]
| Yes: , default configuration ([[Mux instructions#WIFI | No WIFI]])
| No
| No
|-
| [[Peripherals Summary#MMC|MMC3]]
| No
| No
|-
| [[Peripherals Summary#I2C|I2C1]]
| No
| No
|-
| [[Peripherals Summary#I2C|I2C2]]
| Yes: , default | No configuration
| No
| No
| No
| No, [[Connectors Summary#JC30_connector|via hardware]]
| No
| No
| No
| No
| Yes: shared with , default configuration (DVI<br> | No)
|-
| [[Peripherals Summary#I2C|I2C4]]
| No
| No
|}
=== IGEP MODULE === Next table pretends help you to configure IGEP MODULE. First column shows some OMAP35xx/DM37xx peripherals and first row shows all IGEP MODULE connectors. Read articles about connector and peripheral before use them. Each configuration can take different solutions. <br> There are some connectors than have more peripherals available, but they don't have all signals to use it. <br> Table shows four answers: *"'''Yes, default configuration(utility)'''": Peripheral enabled by default. "utility" shows if this peripheral is used.<br> *"'''Yes, not default configuration(information)'''": Peripheral don't enabled by default. Maybe you need to disable other one<br> *"'''No, via hardware'''": Not available, but via hardware (placing or replacing some resistances) can be enabled.<br> *"'''No'''"
[[Category:How_to_forgeWork_in_progress]] [[Category:TutorialsPeripherals]]