360 lines
8.7 KiB
C
360 lines
8.7 KiB
C
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// #include "stdio.h"
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// #include "stdlib.h"
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#include "SWM320.h"
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#include "debug.h"
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#include "uart_Net.h"
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/**********************************************************
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行注释
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内容：系统配置内容
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**********************************************************/
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//传送物理参数
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static NET_PHY_PROP uartPhy = {
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.BandRate = 115200,
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.TransportDistance = 2000000,
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.CalMessageLen = UartBusMessageLenCal,
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};
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//报文定义
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//定义报文长度使用const，因为驱动需要知道到底长度是多少
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#define SOURCE_ADDR_LEN 2
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#define DEST_ADDR_LEN 2
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#define DATE_LEN 18
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#define CRC_LEN 1
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typedef struct
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{
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u8 sourceAddress[SOURCE_ADDR_LEN]; //源地址
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u8 destinationAddress[DEST_ADDR_LEN]; //目标地址
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u8 date[DATE_LEN]; //数据
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u8 crc[CRC_LEN]; // CRC校验
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} NET_MSG;
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//设置地址
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static NET_MSG msg = {
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.sourceAddress[0] = 0x00,
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.sourceAddress[1] = 0x01,
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};
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// CRC设置
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#define USE_CRC_8 1
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/**********************************************************
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行注释
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内容：HAL层
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**********************************************************/
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/**
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* @brief 串口初始化
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*
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*/
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static void SerialInit(void)
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{
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UART_InitStructure UART_initStruct;
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PORT_Init(PORTC, PIN4, FUNMUX0_UART1_RXD, 1); // GPIOA.2配置为UART0输入引脚
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PORT_Init(PORTC, PIN5, FUNMUX1_UART1_TXD, 0); // GPIOA.3配置为UART0输出引脚
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UART_initStruct.Baudrate = 115200;
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UART_initStruct.DataBits = UART_DATA_8BIT;
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UART_initStruct.Parity = UART_PARITY_NONE;
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UART_initStruct.StopBits = UART_STOP_1BIT;
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UART_initStruct.RXThreshold = 0;
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UART_initStruct.RXThresholdIEn = 1;
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UART_initStruct.TXThreshold = 3;
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UART_initStruct.TXThresholdIEn = 0;
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UART_initStruct.TimeoutTime = 1; // 10个字符时间内未接收到新的数据则触发超时中断
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UART_initStruct.TimeoutIEn = 0;
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UART_Init(UART1, &UART_initStruct);
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UART_Open(UART1);
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}
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// uart发送的数据缓存
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static u8 uartDate = 0;
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// uart接收的数据和发送的数据是否相同1：相同，0不同
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static volatile u8 uartRight = 0;
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// uart是出于发送还是接收状态1：发送，0接收
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static volatile u8 uartSend = 0;
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void UART1_Handler(void)
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{
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if (UART_INTRXThresholdStat(UART1) || UART_INTTimeoutStat(UART1))
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{
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u32 chr;
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// Printf("x");
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while (UART_IsRXFIFOEmpty(UART1) == 0)
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{
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if (UART_ReadByte(UART1, &chr) == 0)
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{
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if (uartSend == 1)
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{
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if ((u8)chr == uartDate)
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{
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uartRight = 1;
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Printf("%c", (u8)chr);
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}
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}
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else
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{
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}
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}
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}
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}
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}
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/**
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* @description: 读取UART数据 interface
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* @return {*} uart数据
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*/
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static u8 NetRead()
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{
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}
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/**
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* @description: 写入UART数据 interface
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* @return {*}
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*/
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static void NetWrite(u8 data)
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{
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uartDate = data;
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uartRight = 0;
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UART_WriteByte(UART1, (u32)data);
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while (UART_IsTXBusy(UART1))
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;
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}
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/**
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* @description: NET实现软件定时器
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* @param {void} *hdl 要执行的函数
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* @param {void} *priv 要执行函数的参数
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* @param {u8} time 定时时间（ms)
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* @return {*}
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*/
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static void NetSorftTimer(void *hdl, void *priv, u8 time)
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{
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}
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//
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#define NetPrint(format, ...) Printf(format, ##__VA_ARGS__)
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/*-----------------------------------------------------------分割线---------------------------------------------*/
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/**********************************************************
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行注释
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内容：系统驱动代码
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**********************************************************/
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/**
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* @brief 计算uart报文段长度
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*
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* @return u32 报文长度，bit
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*/
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u32 UartBusMessageLenCal(void *priv)
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{
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NET_PHY_PROP *tis = (NET_PHY_PROP *)priv;
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float distance = (float)tis->TransportDistance;
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float deltaTime = distance / (200000000) * 2;
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tis->MessageLenMin = (distance / (tis->BandRate) + 1);
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}
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#if (USE_CRC_8)
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// CRC 8 的除数是9位,但是最高位为1，不需要计算
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const u8 CRC8 = 0x31;
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/**********************************************************
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行注释
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内容：
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1.
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计算机实现CRC方法：
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crc 8 算法分析
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计算16数据
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1011001100111010 00110001
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结果 11010110
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只计算u8数，后面补0
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2 1011001100000000
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00110001
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11010111
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结果 11101100
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3.将后面的u8与计算结果亦或
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11101100
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00111010
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11010110
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发现可以还原
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2. CRC加密还原方法
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加密：数据直接调用函数加密
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解密：数据最后一位加上CRC值，如果CRC结果=0则CRC校验通过
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**********************************************************/
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// void ptb(u8 data)
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// {
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// u8 str[10];
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// itoa(data, str, 2);
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// printf("%s\n", str);
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// }
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/**
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* @brief
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*
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* @param data
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* @param len
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* @return u8
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*/
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u8 CRC_8_ENC(u8 *data, u32 len)
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{
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u8 crc = 0;
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for (u32 i = 0; i < len; i++)
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{
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crc ^= *(data++);
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for (u32 j = 0; j < 8; j++)
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{
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if (crc & 0x80)
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{
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crc = crc << 1;
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crc ^= CRC8;
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}
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else
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{
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crc = crc << 1;
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}
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}
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}
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return crc;
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}
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#endif
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/**
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* @brief 发送函数基础
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*
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* @param data 数据
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* @param len 长度
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* @param destAddr 目标地址
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* @return u32
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*/
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u32 NetSendBase(u8 *data, u32 len, u8 *destAddr)
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{
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/**********************************************************
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行注释
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内容：写入目的地址
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**********************************************************/
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for (u32 i = 0; i < DEST_ADDR_LEN; i++)
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{
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msg.destinationAddress[i] = destAddr[i];
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}
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// NetPrint("dest addr write\n");
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/**********************************************************
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行注释
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内容：拷贝数据，超出位填写0x00
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**********************************************************/
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for (u32 i = 0; i < DATE_LEN; i++)
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{
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if (i <= DATE_LEN)
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{
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msg.date[i] = data[i];
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}
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else
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{
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msg.date[i] = 0;
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}
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}
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// NetPrint("data write\n");
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/**********************************************************
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行注释
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内容：填充CRC计算结果
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**********************************************************/
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#if (USE_CRC_8)
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msg.crc[0] = CRC_8_ENC(msg.date, sizeof(msg.date));
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#endif
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// NetPrint("crc cal\n");
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/**********************************************************
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行注释
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内容：发送数据
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**********************************************************/
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u8 *dataTram = (u8 *)&msg;
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// NetPrint("start send\n");
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uartSend = 1;
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for (u32 i = 0; i < sizeof(msg); i++)
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{
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NetWrite(dataTram[i]);
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u32 time = 1000;
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while (time--)
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{
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if (uartRight == 1)
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{
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break;
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}
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}
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if (uartRight == 0)
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{
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return MSG_SEND_MAY_ERR;
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}
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}
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uartSend = 0;
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return 0;
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}
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/**
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* @brief 总线发送错误的报文,通知其他设备发生了传输错误
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*
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*/
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void NetSendErrPage(){
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for (u32 i = 0; i < DATE_LEN/2; i++){
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}
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}
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/**
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* @brief Net发送函数
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*
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* @param data
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* @param len
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* @param destAddr
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* @return u32
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*/
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u32 NetSend(u8 *data, u32 len, u8 *destAddr)
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{
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while (len)
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{
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if (len > DATE_LEN)
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{
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NetSendBase(data, DATE_LEN, destAddr);
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len -= DATE_LEN;
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data += DATE_LEN;
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}
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else
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{
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NetSendBase(data, len, destAddr);
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len = 0;
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}
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}
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}
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/**
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* @brief
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*
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* @param data
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* @param len
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*/
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void NetReceive(u8 *data, u32 len)
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{
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}
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/**
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* @brief 网络初始化
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*
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*/
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u32 NetInit()
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{
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/**********************************************************
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行注释
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内容：检查报文段定义长度下限
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**********************************************************/
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uartPhy.CalMessageLen(&uartPhy);
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NetPrint("MessageLenMin= %d\n", uartPhy.MessageLenMin);
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if ((sizeof(NET_MSG) < uartPhy.MessageLenMin))
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{
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NetPrint("ERROR:MSG_LEN_TOO_SHORT");
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return MSG_LEN_TOO_SHORT;
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}
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/**********************************************************
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行注释
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内容：检查报文段定义长度上限
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**********************************************************/
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#if (USE_CRC_8)
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if (sizeof(NET_MSG) > 64)
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{
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NetPrint("ERROR:MSG_LEN_TOO_LONG");
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return MSG_LEN_TOO_LONG;
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}
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#endif
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/**********************************************************
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行注释
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内容：串口初始化
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**********************************************************/
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SerialInit();
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return 0;
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}
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