uart3.rar_STM8 LIN 初始化_STM8AF_ LIN-UART_lin_lin stm8_stm8 lin

#include "common.h" /** * UART3 LIN 相关变量 */ short GV_Uart3DataReceived = 0; short GV_Uart3BreakReceived = 0; short ResponseDataByteIndex = 0; volatile u8 GV_Uart3ReceptionError = 0; volatile u8 GV_Uart3DataReceiveByte = 0; UART3_LIN_FSM_STATE GV_Uart3LinFSMState = Idle; /** * UART3 初始化 */ void UART3_CInit() { // 拉高 NSLP 口电平，唤醒 TJA1020 芯片 GPIO_Init(UART3_LIN_NSLP_PORT, UART3_LIN_NSLP_PIN, GPIO_MODE_OUT_PP_HIGH_SLOW); // 配置成从节点 UART3_LINConfigSlave(); } /** * UART3 发送字节 * * @param byte 8位字节 */ void UART3_SendByte( u8 byte ) { // 发送字节 UART3_SendData8(byte); // 等待发送完成 // RESET = 0; SET = 1; // UART3_FLAG_TXE 表示 发送数据寄存器空标志（即表示UART3没有发送）， // 如果其等于 1，那么表示 URAR1 发送完成或者闲置中；如果其等于 0，那么表示 UART3 正在发送 while( UART3_GetFlagStatus(UART3_FLAG_TXE) == RESET ); } /** * UART3 发送字节集 * * @param bytes 8位字节集 * @param length 字节集长度 */ void UART3_SendBytes( u8 *bytes, short length ) { for( short i = 0; i < length; i++ ) { UART3_SendByte(bytes[i]); } } /** * UART3 LIN 配置成从节点 */ void UART3_LINConfigSlave() { // 初始 UART3 UART3_DeInit(); UART3_Init((u32)9600, UART3_WORDLENGTH_8D, UART3_STOPBITS_1, UART3_PARITY_NO, UART3_MODE_RX_ENABLE); // 配置 UART3 LIN UART3_LINConfig(UART3_LIN_MODE_SLAVE, UART3_LIN_AUTOSYNC_ENABLE, UART3_LIN_DIVUP_LBRR1); UART3_LINBreakDetectionConfig(UART3_LINBREAKDETECTIONLENGTH_11BITS); // 启用 UART3 读中断，启用 Lin Break 中断 UART3_ITConfig(UART3_IT_RXNE_OR, ENABLE); UART3_ITConfig(UART3_IT_LBDF, ENABLE); // 启用 UART3 LIN UART3_LINCmd(ENABLE); } /** * UART3 LIN 配置成主节点 */ void UART3_LINConfigMaster() { // 初始 UART3 UART3_DeInit(); UART3_Init((u32)9600, UART3_WORDLENGTH_8D, UART3_STOPBITS_1, UART3_PARITY_NO, UART3_MODE_TXRX_ENABLE); // 配置 UART3 LIN UART3_LINConfig(UART3_LIN_MODE_MASTER, UART3_LIN_AUTOSYNC_DISABLE, UART3_LIN_DIVUP_LBRR1); UART3_LINBreakDetectionConfig(UART3_LINBREAKDETECTIONLENGTH_11BITS); // 启用 UART3 LIN UART3_LINCmd(ENABLE); // 启用 UART3 读中断，关闭 Lin Break 中断 UART3_ITConfig(UART3_IT_RXNE_OR, ENABLE); UART3_ITConfig(UART3_IT_LBDF, DISABLE); } /** * UART3 LIN 主任务 */ void UART3_LINMainTask() { switch( GV_Uart3LinFSMState ){ /* ------------- */ /* STATE Idle : */ /* ------------- */ case Idle : // 关闭数据接收中断并开启 Break 检测中断，等待 Break UART3_ITConfig(UART3_IT_RXNE_OR, DISABLE); UART3_ITConfig(UART3_IT_LBDF, ENABLE); GV_Uart3LinFSMState = Break; ResponseDataByteIndex=0; break; /* -------------------------------------------------- */ /* STATE Break : Waiting for Synch Break（间隔域） /* -------------------------------------------------- */ case Break: if( GV_Uart3BreakReceived ){ GV_Uart3BreakReceived = 0; // 关闭 Break 检测中断并开启数据接收中断，等待数据 UART3_ITConfig(UART3_IT_LBDF, DISABLE); UART3_ITConfig(UART3_IT_RXNE_OR, ENABLE); GV_Uart3LinFSMState = SynchField; } else if( GV_Uart3DataReceived ){ GV_Uart3DataReceived = 0; // 关闭数据接收中断并开启 Break 检测中断 UART3_ITConfig(UART3_IT_RXNE_OR, DISABLE); UART3_ITConfig(UART3_IT_LBDF, ENABLE); } break; /* ---------------------------------------------------- */ /* STATE SynchField : Waiting for Synch Field（同步域） /* ---------------------------------------------------- */ case SynchField: if( GV_Uart3DataReceived & !GV_Uart3ReceptionError ){ GV_Uart3DataReceived = 0; GV_Uart3LinFSMState = GV_Uart3DataReceiveByte == 0x55 ? Identifier : Idle; } else if( GV_Uart3ReceptionError ){ GV_Uart3ReceptionError = 0; GV_Uart3LinFSMState = Idle; } break; /* ------------------------------------------------ */ /* STATE IDField : Waiting for ID Field（标识符域） */ /* ------------------------------------------------ */ case Identifier: // 重置数据接收标记 if ( GV_Uart3DataReceived & !GV_Uart3ReceptionError ) GV_Uart3DataReceived = 0; /* Store ID for enhanced checksum calculation */ //LINChecksumBuffer[0]=UART3Data; //ResponseDataByteIndex=1; /* index for 1st data */ /* switch( GV_Uart3DataByte ){ case MS0ID: GV_Uart3LinFSMState = DataReception; DLC=8; break; case MS2ID: for (Index=0;Index<8;Index++) { DataToSend[Index]=DataBuffer[1][Index]; } GV_Uart3LinFSMState = DataTransmission; DLC=8; break; case SM1ID: GV_Uart3LinFSMState = DataReception; DLC=4; break; case SM3ID: for (Index=0;Index<8;Index++) { DataToSend[Index]=DataBuffer[3][Index]; } LIN_FSM = DataTransmission; DLC=4; break; default: LIN_FSM = Idle; break; } } #ifdef LINUART else if (ReceptionError|IdentifierParityError) { ReceptionError=0; IdentifierParityError=0; LINError(); LIN_FSM = Idle; } #else else if (ReceptionError) { ReceptionError=0; LINError(); LIN_FSM = Idle; } #endif */ break; } }