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基于WINCE的C语言串口通信项目源码解析

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标题中提到的“Serial_Test_final”暗示这是一个C语言编写的串口通信测试项目,具体针对的是基于WINCE操作系统的嵌入式设备。在描述中指出,该项目的目标是实现计算机与WINCE嵌入式系统设备之间的串口通信。通过这个项目,学习者可以深入了解C语言在实际项目中的应用,特别是在进行串口通信编程时涉及的诸多细节。 首先,我们来详细探讨一下WINCE操作系统。WINCE,即Windows Embedded Compact,是微软公司开发的一种专为嵌入式系统设计的操作系统。它具备小型化、模块化、实时性、可定制等特点,广泛应用于移动电话、个人数字助理(PDA)、工业控制器等领域。由于WINCE是微软的产品,因此它支持.NET Compact Framework,允许开发者使用C#等高级语言进行开发。但是,底层硬件控制和性能敏感的任务,尤其是串口通信,通常更适合使用C语言来实现,因为它能提供更接近硬件的操作和更高的执行效率。 接下来我们分析“串口通信”。串行通信(Serial Communication)是计算机与外部设备交换数据的一种方式,它通过串行端口将数据一位一位地顺序传送。相比并行通信,串口通信的主要优势在于只需较少的传输线(一般只用三到五根,例如TxD发送、RxD接收、地线和可选的握手信号线)和更简单的硬件接口。串口通信可以工作在不同的波特率(即每秒传输的位数)上,从低速的几Kbps到高速的数Mbps都有可能。 在WINCE系统中实现串口通信,需要进行以下步骤: 1. 配置串口:根据通信要求设置串口的各种参数,如波特率、数据位、停止位、校验位等。 2. 打开串口:使用CreateFile函数打开串口设备,并获取串口的句柄。 3. 构建串口读写操作:编写串口读取和写入的代码,处理设备与计算机之间的数据交换。 4. 错误处理:确保通信过程中出现的错误能够被检测和处理。 5. 关闭串口:通信完成或发生错误时,需要关闭串口,释放系统资源。 在C语言项目源码中,串口通信的实现可能涉及一系列的API调用,包括但不限于: - CreateFile:打开串口设备。 - SetCommState:设置串口参数。 - ReadFile:读取串口数据。 - WriteFile:向串口发送数据。 - CloseHandle:关闭串口句柄。 此外,C语言项目源码中可能会包含事件驱动模型,比如重叠I/O或完成端口,以实现非阻塞或高效的数据通信。 在“压缩包子文件的文件名称列表”中,由于只给出了“Serial_Test_final”,这可能表示该项目源码包含多个文件,其中主文件或入口文件的名称是“Serial_Test_final”。在实际开发中,项目通常会包含多种文件,例如: - 源代码文件:.c文件,包含C语言编写的代码。 - 头文件:.h文件,定义函数、类型、宏等。 - 配置文件:可能包含编译、链接时的配置信息,例如Makefile或项目设置文件。 - 资源文件:可能包括界面设计、串口配置等数据。 根据描述和标签,这个项目非常适合初学者进行学习和实践,因为它是一个典型的C语言实战项目案例,涉及到操作系统底层通信机制,并且是一个广泛存在于各种嵌入式设备的通信方式。通过研究和修改这个项目,初学者可以加深对C语言程序结构、系统编程以及嵌入式系统中串口通信机制的理解。

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/************************************************************************************************** Filename: ZMain.c Revised: $Date: 2010-09-17 16:25:30 -0700 (Fri, 17 Sep 2010) $ Revision: $Revision: 23835 $ Description: Startup and shutdown code for ZStack Notes: This version targets the Chipcon CC2530 Copyright 2005-2010 Texas Instruments Incorporated. All rights reserved. IMPORTANT: Your use of this Software is limited to those specific rights granted under the terms of a software license agreement between the user who downloaded the software, his/her employer (which must be your employer) and Texas Instruments Incorporated (the "License"). You may not use this Software unless you agree to abide by the terms of the License. The License limits your use, and you acknowledge, that the Software may not be modified, copied or distributed unless embedded on a Texas Instruments microcontroller or used solely and exclusively in conjunction with a Texas Instruments radio frequency transceiver, which is integrated into your product. Other than for the foregoing purpose, you may not use, reproduce, copy, prepare derivative works of, modify, distribute, perform, display or sell this Software and/or its documentation for any purpose. YOU FURTHER ACKNOWLEDGE AND AGREE THAT THE SOFTWARE AND DOCUMENTATION ARE PROVIDED 揂S IS?WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY, TITLE, NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL TEXAS INSTRUMENTS OR ITS LICENSORS BE LIABLE OR OBLIGATED UNDER CONTRACT, NEGLIGENCE, STRICT LIABILITY, CONTRIBUTION, BREACH OF WARRANTY, OR OTHER LEGAL EQUITABLE THEORY ANY DIRECT OR INDIRECT DAMAGES OR EXPENSES INCLUDING BUT NOT LIMITED TO ANY INCIDENTAL, SPECIAL, INDIRECT, PUNITIVE OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY, SERVICES, OR ANY CLAIMS BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), OR OTHER SIMILAR COSTS. Should you have any questions regarding your right to use this Software, contact Texas Instruments Incorporated at www.TI.com. **************************************************************************************************/ /********************************************************************* * INCLUDES */ #ifndef NONWK #include "AF.h" #endif #include "hal_adc.h" #include "hal_flash.h" #include "hal_lcd.h" #include "hal_led.h" #include "hal_drivers.h" #include "OnBoard.h" #include "OSAL.h" #include "OSAL_Nv.h" #include "ZComDef.h" #include "ZMAC.h" /********************************************************************* * LOCAL FUNCTIONS */ static void zmain_ext_addr( void ); #if defined ZCL_KEY_ESTABLISH static void zmain_cert_init( void ); #endif static void zmain_dev_info( void ); static void zmain_vdd_check( void ); #ifdef LCD_SUPPORTED static void zmain_lcd_init( void ); #endif /********************************************************************* * @fn main * @brief First function called after startup. * @return don't care */ int main( void ) { // Turn off interrupts osal_int_disable( INTS_ALL );//关闭中断 // Initialization for board related stuff such as LEDs HAL_BOARD_INIT();//电路板初始化 // Make sure supply voltage is high enough to run zmain_vdd_check();//供电电压检测 // Initialize board I/O InitBoard( OB_COLD );//初始电路板IO口 // Initialze HAL drivers HalDriverInit();//初始化硬件抽样层驱动 // Initialize NV System osal_nv_init( NULL );//初始化NVFLASH // Initialize the MAC ZMacInit();//初始化MAC地址 // Determine the extended address zmain_ext_addr();//读取扩展地址 #if defined ZCL_KEY_ESTABLISH // Initialize the Certicom certificate information. zmain_cert_init(); #endif // Initialize basic NV items zgInit(); #ifndef NONWK // Since the AF isn't a task, call it's initialization routine afInit(); #endif // Initialize the operating system osal_init_system(); // Allow interrupts osal_int_enable( INTS_ALL ); // Final board initialization InitBoard( OB_READY ); // Display information about this device zmain_dev_info(); /* Display the device info on the LCD */ #ifdef LCD_SUPPORTED zmain_lcd_init(); #endif #ifdef WDT_IN_PM1 /* If WDT is used, this is a good place to enable it. */ WatchDogEnable( WDTIMX ); #endif osal_start_system(); // No Return from here return 0; // Shouldn't get here. } // main() /********************************************************************* * @fn zmain_vdd_check * @brief Check if the Vdd is OK to run the processor. * @return Return if Vdd is ok; otherwise, flash LED, then reset *********************************************************************/ static void zmain_vdd_check( void ) { uint8 cnt = 16; do { while (!HalAdcCheckVdd(VDD_MIN_RUN)); } while (--cnt); } /************************************************************************************************** * @fn zmain_ext_addr * * @brief Execute a prioritized search for a valid extended address and write the results * into the OSAL NV system for use by the system. Temporary address not saved to NV. * * input parameters * * None. * * output parameters * * None. * * @return None. ************************************************************************************************** */ static void zmain_ext_addr(void) { uint8 nullAddr[Z_EXTADDR_LEN] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; uint8 writeNV = TRUE; // First check whether a non-erased extended address exists in the OSAL NV. if ((SUCCESS != osal_nv_item_init(ZCD_NV_EXTADDR, Z_EXTADDR_LEN, NULL)) || (SUCCESS != osal_nv_read(ZCD_NV_EXTADDR, 0, Z_EXTADDR_LEN, aExtendedAddress)) || (osal_memcmp(aExtendedAddress, nullAddr, Z_EXTADDR_LEN))) { // Attempt to read the extended address from the location on the lock bits page // where the programming tools know to reserve it. HalFlashRead(HAL_FLASH_IEEE_PAGE, HAL_FLASH_IEEE_OSET, aExtendedAddress, Z_EXTADDR_LEN); if (osal_memcmp(aExtendedAddress, nullAddr, Z_EXTADDR_LEN)) { // Attempt to read the extended address from the designated location in the Info Page. if (!osal_memcmp((uint8 *)(P_INFOPAGE+HAL_INFOP_IEEE_OSET), nullAddr, Z_EXTADDR_LEN)) { osal_memcpy(aExtendedAddress, (uint8 *)(P_INFOPAGE+HAL_INFOP_IEEE_OSET), Z_EXTADDR_LEN); } else // No valid extended address was found. { uint8 idx; #if !defined ( NV_RESTORE ) writeNV = FALSE; // Make this a temporary IEEE address #endif /* Attempt to create a sufficiently random extended address for expediency. * Note: this is only valid/legal in a test environment and * must never be used for a commercial product. */ for (idx = 0; idx < (Z_EXTADDR_LEN - 2);) { uint16 randy = osal_rand(); aExtendedAddress[idx++] = LO_UINT16(randy); aExtendedAddress[idx++] = HI_UINT16(randy); } // Next-to-MSB identifies ZigBee devicetype. #if ZG_BUILD_COORDINATOR_TYPE && !ZG_BUILD_JOINING_TYPE aExtendedAddress[idx++] = 0x10; #elif ZG_BUILD_RTRONLY_TYPE aExtendedAddress[idx++] = 0x20; #else aExtendedAddress[idx++] = 0x30; #endif // MSB has historical signficance. aExtendedAddress[idx] = 0xF8; } } if (writeNV) { (void)osal_nv_write(ZCD_NV_EXTADDR, 0, Z_EXTADDR_LEN, aExtendedAddress); } } // Set the MAC PIB extended address according to results from above. (void)ZMacSetReq(MAC_EXTENDED_ADDRESS, aExtendedAddress); } #if defined ZCL_KEY_ESTABLISH /************************************************************************************************** * @fn zmain_cert_init * * @brief Initialize the Certicom certificate information. * * input parameters * * None. * * output parameters * * None. * * @return None. ************************************************************************************************** */ static void zmain_cert_init(void) { uint8 certData[ZCL_KE_IMPLICIT_CERTIFICATE_LEN]; uint8 nullData[ZCL_KE_IMPLICIT_CERTIFICATE_LEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; (void)osal_nv_item_init(ZCD_NV_IMPLICIT_CERTIFICATE, ZCL_KE_IMPLICIT_CERTIFICATE_LEN, NULL); (void)osal_nv_item_init(ZCD_NV_DEVICE_PRIVATE_KEY, ZCL_KE_DEVICE_PRIVATE_KEY_LEN, NULL); // First check whether non-null certificate data exists in the OSAL NV. To save on code space, // just use the ZCD_NV_CA_PUBLIC_KEY as the bellwether for all three. if ((SUCCESS != osal_nv_item_init(ZCD_NV_CA_PUBLIC_KEY, ZCL_KE_CA_PUBLIC_KEY_LEN, NULL)) || (SUCCESS != osal_nv_read(ZCD_NV_CA_PUBLIC_KEY, 0, ZCL_KE_CA_PUBLIC_KEY_LEN, certData)) || (osal_memcmp(certData, nullData, ZCL_KE_CA_PUBLIC_KEY_LEN))) { // Attempt to read the certificate data from its corresponding location on the lock bits page. HalFlashRead(HAL_FLASH_IEEE_PAGE, HAL_FLASH_CA_PUBLIC_KEY_OSET, certData, ZCL_KE_CA_PUBLIC_KEY_LEN); // If the certificate data is not NULL, use it to update the corresponding NV items. if (!osal_memcmp(certData, nullData, ZCL_KE_CA_PUBLIC_KEY_LEN)) { (void)osal_nv_write(ZCD_NV_CA_PUBLIC_KEY, 0, ZCL_KE_CA_PUBLIC_KEY_LEN, certData); HalFlashRead(HAL_FLASH_IEEE_PAGE, HAL_FLASH_IMPLICIT_CERT_OSET, certData, ZCL_KE_IMPLICIT_CERTIFICATE_LEN); (void)osal_nv_write(ZCD_NV_IMPLICIT_CERTIFICATE, 0, ZCL_KE_IMPLICIT_CERTIFICATE_LEN, certData); HalFlashRead(HAL_FLASH_IEEE_PAGE, HAL_FLASH_DEV_PRIVATE_KEY_OSET, certData, ZCL_KE_DEVICE_PRIVATE_KEY_LEN); (void)osal_nv_write(ZCD_NV_DEVICE_PRIVATE_KEY, 0, ZCL_KE_DEVICE_PRIVATE_KEY_LEN, certData); } } } #endif /************************************************************************************************** * @fn zmain_dev_info * * @brief This displays the IEEE (MSB to LSB) on the LCD. * * input parameters * * None. * * output parameters * * None. * * @return None. ************************************************************************************************** */ static void zmain_dev_info(void) { #ifdef LCD_SUPPORTED uint8 i; uint8 *xad; uint8 lcd_buf[Z_EXTADDR_LEN*2+1]; // Display the extended address. xad = aExtendedAddress + Z_EXTADDR_LEN - 1; for (i = 0; i < Z_EXTADDR_LEN*2; xad--) { uint8 ch; ch = (*xad >> 4) & 0x0F; lcd_buf[i++] = ch + (( ch < 10 ) ? '0' : '7'); ch = *xad & 0x0F; lcd_buf[i++] = ch + (( ch < 10 ) ? '0' : '7'); } lcd_buf[Z_EXTADDR_LEN*2] = '\0'; HalLcdWriteString( "IEEE: ", HAL_LCD_LINE_1 ); HalLcdWriteString( (char*)lcd_buf, HAL_LCD_LINE_2 ); #endif } #ifdef LCD_SUPPORTED /********************************************************************* * @fn zmain_lcd_init * @brief Initialize LCD at start up. * @return none *********************************************************************/ static void zmain_lcd_init ( void ) { #ifdef SERIAL_DEBUG_SUPPORTED { HalLcdWriteString( "TexasInstruments", HAL_LCD_LINE_1 ); #if defined( MT_MAC_FUNC ) #if defined( ZDO_COORDINATOR ) HalLcdWriteString( "MAC-MT Coord", HAL_LCD_LINE_2 ); #else HalLcdWriteString( "MAC-MT Device", HAL_LCD_LINE_2 ); #endif // ZDO #elif defined( MT_NWK_FUNC ) #if defined( ZDO_COORDINATOR ) HalLcdWriteString( "NWK Coordinator", HAL_LCD_LINE_2 ); #else HalLcdWriteString( "NWK Device", HAL_LCD_LINE_2 ); #endif // ZDO #endif // MT_FUNC } #endif // SERIAL_DEBUG_SUPPORTED } #endif /********************************************************************* *********************************************************************/ 以上是DHT11代码,请帮我生成一个光敏代码

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