// U2STAbits.UTXISEL0 = 0;
// Interrupt after one Tx character is transmitted
// U2STAbits.UTXISEL1 = 0;
// U2STAbits.URXISEL = 3;
// Interrupt after one RX character is received
GPSRxBuffers[GPSRxWriteCount ++] = ch;//存入数据 } else if (ch == '*')//GPS校验引导字符 {
GPSRxBuffers[GPSRxWriteCount ++] = ch;//存入数据 } else if ((ch == '\r') && (GPSRxBuffers[GPSRxWriteCount - 3] == '*'))//回车字符校验 {
if (IFS1bits.U2RXIF)//确实是GPS串口2接收中断 {
if (IEC1bits.U2RXIE)//GPS串口2接收中断已被允许 {
ch = U2RXREG;//读取串口GPS数据 if (ch == '$')//是GPS引导字符 {
cData = ch;//记录引导字符 cPosition = GPSRxWriteCount;//引导字符位置记录 GPSRxBuffers[GPSRxWriteCount ++] = ch;//存入数据 } else if (cData == '$')//收到引导字符 { if (ch >= ' ')//可能是有效数据 {
GPቤተ መጻሕፍቲ ባይዱ串口2初始化程序
-------------------------------------------------------------------------*/
void Uart2Init(void)
{
TRIS_TX2 = PORTOUTMODE;//设置TX2为输出IO
TRIS_RX2 = PORTINPUTMODE;//设置RX2为输入IO
} cData = 0;//结束或出错 } } else { cData = 0;//出错 } } } IFS1bits.U2RXIF = 0;//清除RX2中断标志 }
/*------------------------------------------------------------------------
0
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/*------------------------------------------------------------------------
GPS串口2接收中断服务程序(接收GPS数据) 菜农HotPower之PIC24菜鸟毕业留念 2007.12.20 2:40 于菜地留念 -------------------------------------------------------------------------*/ void __attribute__((interrupt, no_auto_psv)) _U2RXInterrupt( void ) { static unsigned char cData = 0, cPosition; unsigned char ch;
GPSRxBuffers[GPSRxWriteCount ++] = ch;//存入数据 } else {
if ((ch == '\n') && (GPSRxBuffers[GPSRxWriteCount - 1] == '\r'))//换行字符校验
{//只取GPRMC语句 if (GPSGPRMCTest((char *)&GPSRxBuffers[cPosition + 1])) { GPSRxBuffers[GPSRxWriteCount ++] = ch;//存入数据 GPSbits.RXFlag = 1;//激活GPS接收成功解码程序(在“零耗时键盘OS”的空闲任务内细加工处理) }
/*-----------------------------------------------------------------------定义GPS串口2中断优先级位1111)
-------------------------------------------------------------------------*/ IPC7bits.U2RXIP0 = 1; IPC7bits.U2RXIP1 = 1; IPC7bits.U2RXIP2 = 1; IEC1bits.U2RXIE = 1; IFS1bits.U2RXIF = 0;//清除RX1中断标志 IEC1bits.U2TXIE = 1; IFS1bits.U2TXIF = 0;//清除TX1中断标志
U2BRG = BRGVAL2;//BAUD Rate Setting for 19200
U2MODEbits.WAKE = 1;//启动位时唤醒使能位
U2MODEbits.UARTEN = 1; // Enable UART
U2STAbits.UTXEN = 1; // Enable UART Tx
U2MODE = 0;
// U2MODEbits.STSEL = 0;// 1-stop bit
// U2MODEbits.PDSEL = 0;// No Parity, 8-data bits
// U2MODEbits.ABAUD = 0;// Autobaud Disabled
U2STA = 0;