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/******************************************************************************
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* Copyright (C) 2014-2015 HangZhou SiZhu Co.,LTD.
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*
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*-----------------------------------------------------------------------------
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* File: RS232.c
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* Description: RS232 gpio config ,receive and send data code
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* Author: Lishoujian (867693272@qq.com)
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* Date: Jan 8, 2015
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*****************************************************************************/
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/* ----------------------- Platform includes --------------------------------*/
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#include "RS232.h"
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#include "stm32f10x.h"
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#include "delay.h"
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//#define DMA_RS232_TX
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#define DMA_RS232_RX
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RX_RS232_T rx_data_s_g;
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//u8 tx232_buf[TX_NUM]= {0};
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void GPRS_RS232_Usart_Init(uint32 system_BaudRate)
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{
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USART_InitTypeDef USART_InitStructure ;
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DMA_InitTypeDef DMA_InitStructure;
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
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RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
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USART_InitStructure.USART_BaudRate = system_BaudRate;
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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USART_InitStructure.USART_StopBits = USART_StopBits_1;
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USART_InitStructure.USART_Parity = USART_Parity_No ;
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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USART_Init(UARTRS232NUM , &USART_InitStructure );
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USART_Cmd(UARTRS232NUM, ENABLE);
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/*DMA½ÓÊÕ·¢Ëͳõʼ»¯*/
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DMA_DeInit(DMA_RS232_RX_Channel);
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/*ÉèÖÃDMAÔ´£º´®¿ÚÊý¾Ý¼Ä´æÆ÷µØÖ·*/
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DMA_InitStructure.DMA_PeripheralBaseAddr =(u32)(&(UARTRS232NUM->DR)) ;
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/*ÄÚ´æµØÖ·(Òª´«ÊäµÄ±äÁ¿µÄÖ¸Õë)*/
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DMA_InitStructure.DMA_MemoryBaseAddr = (u32)(rx_data_s_g.RS232_RX_TEMP_BUF);
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/*·½Ïò£º´ÓË«Ïòµ½ÄÚ´æ*/
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DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
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/*´«Êä´óСDMA_BufferSize=SENDBUFF_SIZE*/
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DMA_InitStructure.DMA_BufferSize = RX232_LENGTH;
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/*ÍâÉèµØÖ·²»Ôö*/
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DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
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/*ÄÚ´æµØÖ·×ÔÔö*/
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DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
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/*ÍâÉèÊý¾Ýµ¥Î»*/
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DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
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/*ÄÚ´æÊý¾Ýµ¥Î» 8bit*/
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DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
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/*DMAģʽ£º²»¶ÏÑ»·*/
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//DMA_InitStructure.DMA_Mode = DMA_Mode_Normal ;
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DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
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/*ÓÅÏȼ¶£ºÖÐ*/
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DMA_InitStructure.DMA_Priority = DMA_Priority_High;
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/*½ûÖ¹ÄÚ´æµ½ÄÚ´æµÄ´«Êä */
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DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
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DMA_Init(DMA_RS232_RX_Channel, &DMA_InitStructure);
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USART_DMACmd(UARTRS232NUM, USART_DMAReq_Rx, ENABLE);
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DMA_Cmd(DMA_RS232_RX_Channel, ENABLE);
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// USART_ClearITPendingBit(UARTRS232NUM, USART_IT_TC);//Çå³ýTC±êÖ¾
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}
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/******************************************
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* func: gprsuart_sendbyte
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* desc: send data by RS232
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* input: USARTx - select USART PORT , buf - receive buffer , len - data length
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* output: none
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* return: none
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*****************************************/
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void gprsuart_sendbyte(unsigned char dat)
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{
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while(USART_GetFlagStatus(UARTRS232NUM,USART_FLAG_TC) == RESET);
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USART_ClearFlag(UARTRS232NUM,USART_FLAG_TC);
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USART_SendData(UARTRS232NUM,dat);
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}
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