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[FreeRTOS Home] [Live FreeRTOS Forum] [FAQ] [Archive Top] [December 2008 Threads] FreeRTOS with ethernetPosted by Rickey Leung on 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
RE: FreeRTOS with ethernetPosted by Stefano Oliveri on 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
RE: FreeRTOS with ethernetPosted by Rickey Leung on 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 );
RE: FreeRTOS with ethernetPosted by Stefano Oliveri on 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
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