uart dma

[tomslas]

Posted on September 18, 2007 at 06:03

uart dma

[tomslas]

Posted on May 17, 2011 at 09:46

This's my simple program. Program don't send text by UART0

Where's my bug: :-[ /****************************************************************************** * File Name : main.c * Author : Test * Date First Issued : 05/18/2006 : Version 1.0 * Description : Main program body *******************************************************************************/ /* Includes ------------------------------------------------------------------*/ #include ''91x_lib.h'' /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ #define TxBufferSize (countof(TxBuffer) - 1) #define RxBufferSize 0xFF /* Private macro -------------------------------------------------------------*/ #define countof(a) (sizeof(a) / sizeof(*(a))) /* Private variables ---------------------------------------------------------*/ DMA_InitTypeDef DMA_InitStruct; UART_InitTypeDef UART_InitStructure; u8 TxBuffer[] = ''UART Example1: UART - This is example text\n\r''; u8 RxBuffer[RxBufferSize]; u8 NbrOfDataToTransfer = TxBufferSize; u8 TxCounter = 0; u8 RxCounter = 0; /* Private function prototypes -----------------------------------------------*/ void SCU_Configuration(void); void GPIO_Configuration(void); void Uart0_Write(u8 *string, u32 size) { // wait the end of previous tx while(UART_GetFlagStatus(UART0, UART_FLAG_TxFIFOEmpty) == RESET); UART_ITConfig(UART0, UART_IT_Transmit, DISABLE); DMA_ChannelCmd (DMA_Channel1, DISABLE);//Enable the DMA channel DMA_Channel1->SRC = (u32)string; DMA_Channel1->CC &= 0xFFFFF000; DMA_Channel1->CC |= size & 0x0FFF; DMA_ChannelCmd (DMA_Channel1, ENABLE);//Enable the DMA channel } void Uart0_INIT() { /* UART0 configuration -------------------------------------------------------*/ /* UART0 configured as follow: - Word Length = 7 Bits - Two Stop Bit - No parity - BaudRate = 115200 baud - Hardware flow control disabled - 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_2; 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_Enable; UART_InitStructure.UART_TxFIFOLevel = UART_FIFOLevel_1_2; /* FIFO size 16 bytes, FIFO level 8 bytes */ UART_InitStructure.UART_RxFIFOLevel = UART_FIFOLevel_1_2; /* FIFO size 16 bytes, FIFO level 8 bytes */ UART_DeInit(UART0); UART_Init(UART0, &UART_InitStructure); UART_ITConfig(UART0, UART_IT_Receive, ENABLE); } void DMA1_INIT() { SCU_AHBPeriphClockConfig(__DMA,ENABLE); /* Enable the clock for DMA*/ /* No next linked list item*/ DMA_InitStruct.DMA_Channel_LLstItm= 0; /* Source address of the DMA transfer */ DMA_InitStruct.DMA_Channel_SrcAdd=(u32)(&TxBuffer[0]); /* Destination address of DMA the transfer is UART Data reg*/ DMA_InitStruct.DMA_Channel_DesAdd=(u32)(&UART0->DR); /* Source data width is Byte */ DMA_InitStruct.DMA_Channel_SrcWidth= DMA_SrcWidth_Byte; /* Destination bus width is Byte */ DMA_InitStruct.DMA_Channel_DesWidth= DMA_DesWidth_Byte; /* DMAC is The flow controller*/ DMA_InitStruct.DMA_Channel_FlowCntrl=DMA_FlowCntrl1_DMA; /*The DMAC is triggered by the SSP_DMA_Transmit request.*/ DMA_InitStruct.DMA_Channel_Des= DMA_DES_UART0_TX; /*Transfer size of 12 data */ DMA_InitStruct.DMA_Channel_TrsfSize = TxBufferSize; /* Update the DMA channel0 registers with DMA_InitStruct values */ DMA_Init(DMA_Channel1,&DMA_InitStruct); /* Enable Source increment */ DMA_ChannelSRCIncConfig (DMA_Channel1, ENABLE); /*Enable the Terminal Count interrupt*/ DMA_ITConfig(DMA_Channel1, ENABLE); DMA_ITMaskConfig(DMA_Channel1, DMA_ITMask_ITC, ENABLE); /*Enable the DMA channel0*/ DMA_ChannelCmd (DMA_Channel1,ENABLE); } /* Private functions ---------------------------------------------------------*/ /******************************************************************************* * Function Name : main * Description : Main program * Input : None * Output : None * Return : None *******************************************************************************/ int main() { #ifdef DEBUG debug(); #endif /* Configure the system clocks */ SCU_Configuration(); /* Configure the GPIO ports */ GPIO_Configuration(); Uart0_INIT(); UART_DMACmd(UART0, UART_DMAReq_Tx, ENABLE); DMA1_INIT(); VIC_Config(UART0_ITLine, VIC_IRQ, 1); VIC_ITCmd(UART0_ITLine, ENABLE); // Enable the Interrupt controller to manage IRQ channel UART_Cmd(UART0, ENABLE); Uart0_Write( &TxBuffer[0], TxBufferSize); while (1); } /******************************************************************************* * Function Name : SCU_Configuration * Description : Configures the system clocks. * Input : None * Output : None * Return : None *******************************************************************************/ void SCU_Configuration(void) { /* Enable the clock for DMA*/ SCU_AHBPeriphClockConfig(__DMA,ENABLE); SCU_AHBPeriphClockConfig(__VIC, ENABLE); /* Enable the UART0 Clock */ SCU_APBPeriphClockConfig(__UART0, ENABLE); /* Enable the GPIO3 Clock */ SCU_APBPeriphClockConfig(__GPIO3, ENABLE); /* Enable the GPIO5 Clock */ SCU_APBPeriphClockConfig(__GPIO5, ENABLE); } /******************************************************************************* * Function Name : GPIO_Configuration * Description : Configures the different GPIO ports. * Input : None * Output : None * Return : None *******************************************************************************/ void GPIO_Configuration(void) { GPIO_InitTypeDef GPIO_InitStructure; GPIO_DeInit(GPIO5); /*Gonfigure UART0_Rx pin GPIO5.1*/ GPIO_InitStructure.GPIO_Direction = GPIO_PinInput; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ; GPIO_InitStructure.GPIO_IPConnected = GPIO_IPConnected_Enable; GPIO_Init (GPIO5, &GPIO_InitStructure); GPIO_DeInit(GPIO3); /*Gonfigure UART0_Tx pin GPIO3.4*/ GPIO_InitStructure.GPIO_Direction = GPIO_PinOutput; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4; GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull ; GPIO_InitStructure.GPIO_Alternate = GPIO_OutputAlt3 ; GPIO_Init (GPIO3, &GPIO_InitStructure); }

[tomslas]

Posted on May 17, 2011 at 09:46

OK.

All's OK. I'm find my bug. :D

[sarao]

Posted on May 17, 2011 at 09:46

It would be helpful if you could post your fix.

Thanks.

[tomslas]

Posted on May 17, 2011 at 09:46 The original post was too long to process during our migration. Please click on the provided URL to read the original post. https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I6iZ&d=%2Fa%2F0X0000000btu%2FGiNnzX75t96.M7PHicjU9aXBl6ru.r3dr4nBdYBH4OM&asPdf=false