Hi All,
I add the UART code into EMI example from the ST and compile the following code with the configuration Options->Target -> off-chip RAM1 0x3c000000 size 0x400000 -> on-chip IRAM1 0x4000000 size 0x18000
The message " EMI Example ***" cannot be sent to the Hyperterminal. However, the EMI works fine.
Anyone has experiences with EMI and UART? Could you please point out where I am wrong? Greatly appreciate your help.
u8 TxBuffer[] = "EMI Example ****\n\r" int main() {
#ifdef DEBUG debug(); #endif
/*CPU running @96MHZ*/ MCLK_Config ();
/* Configure the system clocks */ SCU_Configuration();
/* Configure the GPIO ports */ GPIO_Configuration();
/* UART0 configuration -------------------------------------------------------*/ /* UART0 configured as follow: - Word Length = 7 Bits - Two Stop Bit - No parity - BaudRate = 115200 baud - Hardware flow control enabled (RTS and CTS signals) - Receive and transmit enabled - Receive and transmit FIFOs are enabled - Transmit and Receive FIFOs levels have 8 bytes depth */ UART_InitStructure.UART_WordLength = UART_WordLength_8D; UART_InitStructure.UART_StopBits = UART_StopBits_1; UART_InitStructure.UART_Parity = UART_Parity_No ; UART_InitStructure.UART_BaudRate = 115200; UART_InitStructure.UART_HardwareFlowControl = UART_HardwareFlowControl_None; UART_InitStructure.UART_Mode = UART_Mode_Tx_Rx; UART_InitStructure.UART_FIFO = UART_FIFO_Disable;
UART_DeInit(UART0); UART_Init(UART0, &UART_InitStructure);
/* Enable the UART0 */ UART_Cmd(UART0, ENABLE);
/* EMI default configuration : Reset configuration*/ EMI_DeInit();
/**************************EMI configuration*********************************/
EMI_StructInit(&EMI_InitStruct); /* Number of bus turnaround cycles added between read and write accesses.*/ EMI_InitStruct.EMI_Bank_IDCY = 0x3 ;
/* Number of wait states for read accesses*/ //EMI_InitStruct.EMI_Bank_WSTRD = 0x3 ; EMI_InitStruct.EMI_Bank_WSTRD = 0x5 ; /* Number of wait states for write accesses*/ //EMI_InitStruct.EMI_Bank_WSTWR = 0x3 ; EMI_InitStruct.EMI_Bank_WSTWR = 0x4 ;
/*Output enable assertion delay from chip select assertion*/ EMI_InitStruct.EMI_Bank_WSTROEN = 0x2;
/*Write enable assertion delay from chip select assertion*/ EMI_InitStruct.EMI_Bank_WSTWEN = 0x2;
/*This member Controls the memory width*/ EMI_InitStruct.EMI_Bank_MemWidth = EMI_Width_HalfWord;
/*Write protection feature */ EMI_InitStruct.EMI_Bank_WriteProtection = EMI_Bank_NonWriteProtect;
/*Use Bank1 (CS1)*/ EMI_Init( EMI_Bank1, &EMI_InitStruct);
/* Send a buffer from UART to hyperterminal */ while(NbrOfDataToTransfer--) { UART_SendData(UART0, TxBuffer[TxCounter++]); while(UART_GetFlagStatus(UART0, UART_FLAG_TxFIFOFull) != RESET);
}
while (1) {
/*Write in the external memory*/
for (k = 0; k < 32; k++)
*(u16*)(0x3C000000 + (k*2)) = Buffer_Write[k] ; // *(u16*)(0x3C000000 + (k*2)) = 0x0101 ;
/*Read from the external memory*/
Buffer_Read[k] = *(u16*)(0x3C000000 + (k * 2)) ;
/*Comparaison*/
/* Check the received data with the send ones */ TransferStatus = Buffercmp(Buffer_Write, Buffer_Read, 32);
if (TransferStatus != 0) UART_SendData(UART0, (u8)(TransferStatus+48));
} /******************************************************************************* * Function Name : SCU_Configuration * Description : Configures the system clocks. * Input : None * Output : None * Return : None *******************************************************************************/ void SCU_Configuration(void) {
/* Enable the clock for EMI*/ SCU_AHBPeriphClockConfig(__EMI | __EMI_MEM_CLK, ENABLE);
/*BCLK=96Mhz*/ SCU_EMIBCLKDivisorConfig(SCU_EMIBCLK_Div1);
/*Enable the Mux mode*/ SCU_EMIModeConfig(SCU_EMI_MUX);
/*ALE length and polarity definition*/ SCU_EMIALEConfig(SCU_EMIALE_LEN1, SCU_EMIALE_POLHigh);
/* Enable the GPIO7 Clock */ SCU_APBPeriphClockConfig(__GPIO7 , ENABLE); SCU_APBPeriphReset(__GPIO7,DISABLE);
SCU_APBPeriphClockConfig(__UART0, ENABLE); SCU_APBPeriphReset(__UART0,DISABLE);
/* Enable the GPIO2 Clock */ SCU_APBPeriphClockConfig(__GPIO2, ENABLE); SCU_APBPeriphReset(__GPIO2,DISABLE); /* Enable the GPIO3 Clock */ SCU_APBPeriphClockConfig(__GPIO3, ENABLE); SCU_APBPeriphReset(__GPIO3,DISABLE);
/* Enable the GPIO8 Clock */ SCU_APBPeriphClockConfig(__GPIO8, ENABLE); SCU_APBPeriphReset(__GPIO8,DISABLE); /* Enable the GPIO9 Clock */ SCU_APBPeriphClockConfig(__GPIO9, ENABLE); SCU_APBPeriphReset(__GPIO9,DISABLE);
/******************************************************************************* * Function Name : GPIO_Configuration * Description : Configures the different GPIO ports. * Input : None * Output : None * Return : None *******************************************************************************/ void GPIO_Configuration(void) { /* GPIO8,GPIO9 Configuration*/
GPIO_EMIConfig(ENABLE);
/* GPIO7 Configuration */ GPIO_DeInit(GPIO7); GPIO_InitStructure.GPIO_Direction = GPIO_PinOutput; /* GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 ; */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull; GPIO_InitStructure.GPIO_Alternate = GPIO_OutputAlt2 ; GPIO_Init (GPIO7, &GPIO_InitStructure);
//uart0 setup
GPIO_DeInit(GPIO3); /*Gonfigure UART0_Rx pin GPIO3.0*/ GPIO_InitStructure.GPIO_Direction = GPIO_PinInput; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ; GPIO_InitStructure.GPIO_IPConnected = GPIO_IPConnected_Enable; GPIO_InitStructure.GPIO_Alternate = GPIO_InputAlt1 ; GPIO_Init (GPIO3, &GPIO_InitStructure);
/* GPIO_DeInit(GPIO3); */ /*Gonfigure UART0_Tx pin GPIO3.1*/ GPIO_InitStructure.GPIO_Direction = GPIO_PinInput; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ; GPIO_InitStructure.GPIO_Alternate = GPIO_OutputAlt2 ; GPIO_Init (GPIO3, &GPIO_InitStructure); }
I post the code again. Thank you for your help.
Lillian
int main() { #ifdef DEBUG debug(); #endif /*CPU running @96MHZ*/ MCLK_Config (); /* Configure the system clocks */ SCU_Configuration(); /* Configure the GPIO ports */ GPIO_Configuration(); /* UART0 configuration -------------------------------------------------------*/ /* UART0 configured as follow: - Word Length = 7 Bits - Two Stop Bit - No parity - BaudRate = 115200 baud - Hardware flow control enabled (RTS and CTS signals) - Receive and transmit enabled - Receive and transmit FIFOs are enabled - Transmit and Receive FIFOs levels have 8 bytes depth */ UART_InitStructure.UART_WordLength = UART_WordLength_8D; UART_InitStructure.UART_StopBits = UART_StopBits_1; UART_InitStructure.UART_Parity = UART_Parity_No ; UART_InitStructure.UART_BaudRate = 115200; UART_InitStructure.UART_HardwareFlowControl = UART_HardwareFlowControl_None; UART_InitStructure.UART_Mode = UART_Mode_Tx_Rx; UART_InitStructure.UART_FIFO = UART_FIFO_Disable; UART_DeInit(UART0); UART_Init(UART0, &UART_InitStructure); /* Enable the UART0 */ UART_Cmd(UART0, ENABLE); /* EMI default configuration : Reset configuration*/ EMI_DeInit(); /**************************EMI configuration*********************************/ EMI_StructInit(&EMI_InitStruct); /* Number of bus turnaround cycles added between read and write accesses.*/ EMI_InitStruct.EMI_Bank_IDCY = 0x3 ; /* Number of wait states for read accesses*/ //EMI_InitStruct.EMI_Bank_WSTRD = 0x3 ; EMI_InitStruct.EMI_Bank_WSTRD = 0x5 ; /* Number of wait states for write accesses*/ //EMI_InitStruct.EMI_Bank_WSTWR = 0x3 ; EMI_InitStruct.EMI_Bank_WSTWR = 0x4 ; /*Output enable assertion delay from chip select assertion*/ EMI_InitStruct.EMI_Bank_WSTROEN = 0x2; /*Write enable assertion delay from chip select assertion*/ EMI_InitStruct.EMI_Bank_WSTWEN = 0x2; /*This member Controls the memory width*/ EMI_InitStruct.EMI_Bank_MemWidth = EMI_Width_HalfWord; /*Write protection feature */ EMI_InitStruct.EMI_Bank_WriteProtection = EMI_Bank_NonWriteProtect; /*Use Bank1 (CS1)*/ EMI_Init( EMI_Bank1, &EMI_InitStruct); /* Send a buffer from UART to hyperterminal */ while(NbrOfDataToTransfer--) { UART_SendData(UART0, TxBuffer[TxCounter++]); while(UART_GetFlagStatus(UART0, UART_FLAG_TxFIFOFull) != RESET); } while (1) { /*Write in the external memory*/ for (k = 0; k < 32; k++) *(u16*)(0x3C000000 + (k*2)) = Buffer_Write[k] ; // *(u16*)(0x3C000000 + (k*2)) = 0x0101 ; /*Read from the external memory*/ for (k = 0; k < 32; k++) Buffer_Read[k] = *(u16*)(0x3C000000 + (k * 2)) ; /*Comparaison*/ /* Check the received data with the send ones */ TransferStatus = Buffercmp(Buffer_Write, Buffer_Read, 32); if (TransferStatus != 0) UART_SendData(UART0, (u8)(TransferStatus+48)); } } /******************************************************************************* * Function Name : SCU_Configuration * Description : Configures the system clocks. * Input : None * Output : None * Return : None *******************************************************************************/ void SCU_Configuration(void) { /* Enable the clock for EMI*/ SCU_AHBPeriphClockConfig(__EMI | __EMI_MEM_CLK, ENABLE); /*BCLK=96Mhz*/ SCU_EMIBCLKDivisorConfig(SCU_EMIBCLK_Div1); /*Enable the Mux mode*/ SCU_EMIModeConfig(SCU_EMI_MUX); /*ALE length and polarity definition*/ SCU_EMIALEConfig(SCU_EMIALE_LEN1, SCU_EMIALE_POLHigh); /* Enable the GPIO7 Clock */ SCU_APBPeriphClockConfig(__GPIO7 , ENABLE); SCU_APBPeriphReset(__GPIO7,DISABLE); SCU_APBPeriphClockConfig(__UART0, ENABLE); SCU_APBPeriphReset(__UART0,DISABLE); /* Enable the GPIO2 Clock */ SCU_APBPeriphClockConfig(__GPIO2, ENABLE); SCU_APBPeriphReset(__GPIO2,DISABLE); /* Enable the GPIO3 Clock */ SCU_APBPeriphClockConfig(__GPIO3, ENABLE); SCU_APBPeriphReset(__GPIO3,DISABLE); /* Enable the GPIO8 Clock */ SCU_APBPeriphClockConfig(__GPIO8, ENABLE); SCU_APBPeriphReset(__GPIO8,DISABLE); /* Enable the GPIO9 Clock */ SCU_APBPeriphClockConfig(__GPIO9, ENABLE); SCU_APBPeriphReset(__GPIO9,DISABLE); } /******************************************************************************* * Function Name : GPIO_Configuration * Description : Configures the different GPIO ports. * Input : None * Output : None * Return : None *******************************************************************************/ void GPIO_Configuration(void) { /* GPIO8,GPIO9 Configuration*/ GPIO_EMIConfig(ENABLE); /* GPIO7 Configuration */ GPIO_DeInit(GPIO7); GPIO_InitStructure.GPIO_Direction = GPIO_PinOutput; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_7; GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull; GPIO_InitStructure.GPIO_Alternate = GPIO_OutputAlt2 ; GPIO_Init (GPIO7, &GPIO_InitStructure); //uart0 setup GPIO_DeInit(GPIO3); /*Gonfigure UART0_Rx pin GPIO3.0*/ GPIO_InitStructure.GPIO_Direction = GPIO_PinInput; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ; GPIO_InitStructure.GPIO_IPConnected = GPIO_IPConnected_Enable; GPIO_InitStructure.GPIO_Alternate = GPIO_InputAlt1 ; GPIO_Init (GPIO3, &GPIO_InitStructure); /* GPIO_DeInit(GPIO3); */ /*Gonfigure UART0_Tx pin GPIO3.1*/ GPIO_InitStructure.GPIO_Direction = GPIO_PinInput; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ; GPIO_InitStructure.GPIO_Alternate = GPIO_OutputAlt2 ; GPIO_Init (GPIO3, &GPIO_InitStructure); } /