EMI with 8bit data and 24 bit address

[slawcus]

Posted on April 10, 2008 at 01:55

EMI with 8bit data and 24 bit address

[slawcus]

Posted on May 17, 2011 at 09:48

Hi!

Is is possible to use EMI with 8bit data and 24 bit address? Usermanual doesn't say anything about this configuration.

[kim1417]

Posted on May 17, 2011 at 09:48

Hi.

It is possible.

I used EMI by 8bit Data, 18bit(A0~A17) Address.

I write my source code for EMI Initialize.

-------------------------------------------------------------------

/***

EMI Initialize : External memory interface

Bank0 (nCS0) : SRAM

Bank1 (nCS1) : TL16C554 4EA

Bank2 (nCS2) : W5100(WIZNET)

*/

void EMI_Initialize(void)

{

SCU_AHBPeriphClockConfig(__EMI, ENABLE);

SCU_AHBPeriphClockConfig(__EMI_MEM_CLK, ENABLE);

SCU_AHBPeriphReset(__EMI,ENABLE);

SCU_AHBPeriphReset(__EMI_MEM_CLK,ENABLE);

EMI_DeInit();

GPIO_EMIConfig(ENABLE);

SCU_EMIBCLKDivisorConfig(SCU_EMIBCLK_Div2);

SCU_EMIModeConfig(SCU_EMI_MUX);

SCU_EMIALEConfig(SCU_EMIALE_LEN2,SCU_EMIALE_POLHigh);

GPIO_InitStructure.GPIO_Direction = GPIO_PinOutput;

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;

GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ;

GPIO_InitStructure.GPIO_IPInputConnected = GPIO_IPInputConnected_Disable;

GPIO_InitStructure.GPIO_Alternate = GPIO_OutputAlt2;

GPIO_Init (GPIO8, &GPIO_InitStructure);

GPIO_Init (GPIO9, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Direction = GPIO_PinOutput;

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_7; //P7.7[CS0]

GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ;

GPIO_InitStructure.GPIO_IPInputConnected = GPIO_IPInputConnected_Disable;

GPIO_InitStructure.GPIO_Alternate = GPIO_OutputAlt2;

GPIO_Init (GPIO7, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Direction = GPIO_PinOutput;

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6; // P7.6[CS1]

GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ;

GPIO_InitStructure.GPIO_IPInputConnected = GPIO_IPInputConnected_Disable;

GPIO_InitStructure.GPIO_Alternate = GPIO_OutputAlt3;

GPIO_Init (GPIO7, &GPIO_InitStructure);

EMI_StructInit(&EMI__InitStructure);

EMI__InitStructure.EMI_Bank_IDCY = 0x0F; //0~0x0f

EMI__InitStructure.EMI_Bank_WSTRD = 0x1F; //0~0x1f;

EMI__InitStructure.EMI_Bank_WSTWR = 0x1F; //0~0x1f;

EMI__InitStructure.EMI_Bank_WSTROEN = 0x0F; //0~0x0f

EMI__InitStructure.EMI_Bank_WSTWEN = 0x0F; //0~0x0f;

/// Bank0

EMI__InitStructure.EMI_Bank_MemWidth = EMI_Width_Byte; //8 bit

EMI__InitStructure.EMI_Bank_WriteProtection = EMI_Bank_NonWriteProtect;

EMI__InitStructure.EMI_Burst_and_PageModeRead_TransferLength = EMI_Read_8Data;

EMI__InitStructure.EMI_Burst_and_PageModeRead_Selection = EMI_NormalMode;

EMI_Init( EMI_Bank0,&EMI__InitStructure); //Bank0-->SRAM

/// Bank1

EMI__InitStructure.EMI_Bank_MemWidth = EMI_Width_Byte; //8 bit

EMI__InitStructure.EMI_Bank_WriteProtection = EMI_Bank_NonWriteProtect;

EMI__InitStructure.EMI_Burst_and_PageModeRead_TransferLength = EMI_Read_8Data;

EMI__InitStructure.EMI_Burst_and_PageModeRead_Selection = EMI_NormalMode;

EMI_Init( EMI_Bank1,&EMI__InitStructure); //Bank1-->TL16C554

/// Bank2

// EMI__InitStructure.EMI_Bank_MemWidth=EMI_Width_Byte; //8 bit

// EMI__InitStructure.EMI_Bank_WriteProtection=EMI_Bank_NonWriteProtect;

// EMI__InitStructure.EMI_PageModeRead_TransferLength=EMI_8Data;

// EMI__InitStructure.EMI_PageModeRead_Selection=EMI_NormalMode;

// EMI_Init( EMI_Bank2,&EMI__InitStructure); //Bank2-->W5100

}