FreeRTOS with ethernet

Kernel
1

dotdotdog wrote on Tuesday, December 16, 2008:

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

2

stf12 wrote on Tuesday, December 16, 2008:

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

3

dotdotdog wrote on Tuesday, December 16, 2008:

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 );

4

stf12 wrote on Thursday, December 18, 2008:

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

There is one that describe how to configure the STR9 EMI:

AN2647 - Using the STR91xFA external memory interface (EMI)

Best regards,
Stefano