# FreeRTOS with ethernet **URL:** \ **Category:** Kernel\ **Created:** [December 16, 2008, 3:55am UTC](https://forums.freertos.org/t/freertos-with-ethernet/2415 "2008-12-16T03:55:24Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![system](https://d2v6vdsk2p900z.cloudfront.net/original/1X/7fc8fdb729c645aab5b20282bbe34e57cb407be6.jpeg) [@system](https://forums.freertos.org/u/system)\ **Post date:** [December 16, 2008, 3:55am UTC](https://forums.freertos.org/t/freertos-with-ethernet/2415/1 "2008-12-16T03:55:24Z")
**[dotdotdog](https://sourceforge.net/u/dotdotdog/)** wrote on [Tuesday, December 16, 2008](https://sourceforge.net/p/freertos/discussion/382005/thread/636ef82c/#e0d1): Dear Richard, As mentioned, we need to plug our design board on top of STR91x. But we found a problem, the Ethernet in FreeRTOS on STR91x use the GPIO5 with GPIO\_Struct.GPIO\_Pin = GPIO\_Pin\_2 | GPIO\_Pin\_3; … … GPIO\_InitStructure.GPIO\_Alternate = GPIO\_OutputAlt2; but we need the GPIO5 (Pin 0 and Pin 1) to be our extend memory addressing and must be set as: GPIO\_InitStructure.GPIO\_Alternate = GPIO\_OutputAlt1; It causes the Ethernet not working at all!! Any solution? Can we use another Pin as Ethernet? Rickey Leung ---
**Author:** ![system](https://d2v6vdsk2p900z.cloudfront.net/original/1X/7fc8fdb729c645aab5b20282bbe34e57cb407be6.jpeg) [@system](https://forums.freertos.org/u/system)\ **Post date:** [December 16, 2008, 9:50am UTC](https://forums.freertos.org/t/freertos-with-ethernet/2415/2 "2008-12-16T09:50:16Z")
**[stf12](https://sourceforge.net/u/stf12/)** wrote on [Tuesday, December 16, 2008](https://sourceforge.net/p/freertos/discussion/382005/thread/636ef82c/#e0d1/811e): Dear Rickey, STR91x should allow to configure each in PIN in independent manner. In your case you can try something like this: void GpioCongiguration() {   …   GPIO\_DeInit(GPIO5);   GPIO\_Struct.GPIO\_Pin = GPIO\_Pin\_2 | GPIO\_Pin\_3;   GPIO\_Struct.GPIO\_Type = GPIO\_Type\_PushPull;   GPIO\_Struct.GPIO\_Direction = GPIO\_PinOutput;   GPIO\_Struct.GPIO\_IPInputConnected = GPIO\_IPInputConnected\_Disable;   GPIO\_Struct.GPIO\_Alternate=GPIO\_OutputAlt2;   GPIO\_Init(GPIO5, &GPIO\_Struct);   GPIO\_Struct.GPIO\_Pin = GPIO\_Pin\_0 | GPIO\_Pin\_1;   GPIO\_Struct.GPIO\_Alternate=GPIO\_OutputAlt1;   GPIO\_Init(GPIO5, &GPIO\_Struct);   … } This code doesn’t prevent Ethernet to work. Regards, Stefano ---
**Author:** ![system](https://d2v6vdsk2p900z.cloudfront.net/original/1X/7fc8fdb729c645aab5b20282bbe34e57cb407be6.jpeg) [@system](https://forums.freertos.org/u/system)\ **Post date:** [December 16, 2008, 10:59am UTC](https://forums.freertos.org/t/freertos-with-ethernet/2415/3 "2008-12-16T10:59:53Z")
**[dotdotdog](https://sourceforge.net/u/dotdotdog/)** wrote on [Tuesday, December 16, 2008](https://sourceforge.net/p/freertos/discussion/382005/thread/636ef82c/#e0d1/811e/6959): Many thx~ It solved! But another problem is we need to address the ext. memory (21e00000) in ST91x. I have configured the EMI as follow but still failed~ can you help me?     GPIO\_InitTypeDef GPIO\_InitStructure;     GPIO\_InitStructure.GPIO\_Direction = GPIO\_PinOutput;     GPIO\_InitStructure.GPIO\_Pin = GPIO\_Pin\_4 | GPIO\_Pin\_5 |GPIO\_Pin\_6 | GPIO\_Pin\_7;     GPIO\_InitStructure.GPIO\_Type = GPIO\_Type\_PushPull ;     GPIO\_InitStructure.GPIO\_Alternate = GPIO\_OutputAlt3;     GPIO\_InitStructure.GPIO\_IPInputConnected = GPIO\_IPInputConnected\_Disable;     GPIO\_Init (GPIO5, &GPIO\_InitStructure);     GPIO\_InitStructure.GPIO\_Direction = GPIO\_PinOutput;     GPIO\_InitStructure.GPIO\_Pin = GPIO\_Pin\_All;     GPIO\_InitStructure.GPIO\_Type = GPIO\_Type\_PushPull ;     GPIO\_InitStructure.GPIO\_Alternate = GPIO\_OutputAlt2;     GPIO\_InitStructure.GPIO\_IPInputConnected = GPIO\_IPInputConnected\_Disable;     GPIO\_Init (GPIO7, &GPIO\_InitStructure);     GPIO\_Init (GPIO8, &GPIO\_InitStructure);     GPIO\_Init (GPIO9, &GPIO\_InitStructure);     // those bastards. this one pin out of 24 is on a different alt bus     GPIO\_InitStructure.GPIO\_Pin = GPIO\_Pin\_7;     GPIO\_InitStructure.GPIO\_Alternate = GPIO\_OutputAlt3;     GPIO\_Init (GPIO7, &GPIO\_InitStructure);     // configure SCU     SCU\_EMIModeConfig(SCU\_EMI\_DEMUX);     SCU\_EMIBCLKDivisorConfig(SCU\_EMIBCLK\_Div1); // or SCU\_EMIBCLK\_Div1;     SCU-\>GPIOEMI = 1; // enable ports 8 & 9 for EMI     GPIO\_EMIConfig( ENABLE );     /\* Enable EMI clock \*/     EMI\_DeInit();     EMI\_StructInit( &eMI\_InitStruct );     eMI\_InitStruct.EMI\_Bank\_MemWidth = EMI\_Width\_HalfWord;     eMI\_InitStruct.EMI\_Bank\_IDCY =0x6;     eMI\_InitStruct.EMI\_Bank\_WSTRD =0x6;     eMI\_InitStruct.EMI\_Bank\_WSTWR =0x6;     eMI\_InitStruct.EMI\_Bank\_WSTROEN=0x6;     eMI\_InitStruct.EMI\_Bank\_WSTWEN=0x08;     eMI\_InitStruct.EMI\_Bank\_MemWidth=EMI\_Width\_HalfWord;     EMI\_Init( EMI\_Bank1, &eMI\_InitStruct ); ---
**Author:** ![system](https://d2v6vdsk2p900z.cloudfront.net/original/1X/7fc8fdb729c645aab5b20282bbe34e57cb407be6.jpeg) [@system](https://forums.freertos.org/u/system)\ **Post date:** [December 18, 2008, 7:34am UTC](https://forums.freertos.org/t/freertos-with-ethernet/2415/4 "2008-12-18T07:34:54Z")
**[stf12](https://sourceforge.net/u/stf12/)** wrote on [Thursday, December 18, 2008](https://sourceforge.net/p/freertos/discussion/382005/thread/636ef82c/#e0d1/4d8b): Dear Rickey, have you given a look at the application note from ST? [http://www.st.com/mcu/modules.php?name=mcu&file=familiesdocs&FAM=101](http://www.st.com/mcu/modules.php?name=mcu&file=familiesdocs&FAM=101) There is one that describe how to configure the STR9 EMI: AN2647 - Using the STR91xFA external memory interface (EMI) Best regards, Stefano