UART停止接收

Re8会变低吗？如果不是，它明显地粘在那条线上。如果它变低了，你是否配置它来产生硬件中断？如果是，中断服务程序是否正确地清除中断？如果没有，那么它将被持续地服务于中断。



      以下为原文

    Does RE8 ever go low?
If not, it's plainly stuck on that line.
 
If it is going low, have you configured it to generate a hardware interrupt?
If yes, is your interrupt service routine correctly clearing the interrupt?
If not, then it will be stuck continually servicing the interrupt.

你能提供任何附加的上下文/代码吗？这条线和你的程序的其余部分在哪里？就引脚而言，U5RX和It1是无关的，但是如果你说，进入中断的It1信号，并在等待的同时循环，其他优先级较低的ISR（如UART RX中断）将不会火，直到国际电信局ISR完成。即使这样，U5RX ISR应该一旦INT1 ISR完成，如果我没有错的话（如果一个字符在UT1 ISR正在进行的时候出现在U5中），即使是像QB B所说的那样，如果使用INT1 ISR，也需要确保清除中断标志。否则，你只会一遍又一遍地输入它。如果你正在投票U5RX而不使用ISR，你可能会被卡住，等待R8低，永远不会击中你的UART接收代码。



      以下为原文

    Can you provide any additional context/code?  Where is this while line in relation to the rest of your program?
 
U5RX and INT1 are unrelated as far as pinout is concerned, but if you, say, enter the interrupt for the INT1 signal, and are waiting at that while loop, other ISRs of lower priority (such as a UART RX interrupt) won't fire until the INT1 ISR is complete.  Even then though, U5RX ISR should fire once the INT1 ISR finishes if I'm not mistaken (provided a character came into U5 while the INT1 ISR was in progress).
 
And even then, like qɥb said, you need to make sure you're clearing the interrupt flag if you're using the INT1 ISR.  Otherwise you'll just re-enter it over and over again.  If you're polling U5RX and not using an ISR, you could just be getting stuck waiting for RE8 to go low and never hitting your UART receive code.

Re8的断言很低，并且我已经禁用了中断的中断（）；



      以下为原文

     
RE8 does assert low and I have disabled Interrupts with
INTDisableInterrupts();
 
 

我想现在是我们看到你们所有代码的时候了，你们只是告诉我们你们在做什么。



      以下为原文

    I think it's time we saw ALL of your code.
You're just telling us what you think you are doing.
 

使用的UART调用如下，这是在UntARNUM＝InDeBable中断（）的主体（）//CONTs上；而（PoPTBITS.Re8=＝1）；NUBYBATH＝GetDataBuffer（BUF，SIZEOF（BUF）；UINT GetDataBuffer（char *缓冲器，Unt32 Max大小）{Unt32 Nuffchar；NuthChar＝0；同时（NuthChar & lt；Max大小）{uTin）。8字；UARTRePvEDATAISIS（UART5）：字符＝UARTGetDataByte（UART5）；如果（字符＝＝‘0’）中断；*缓冲器＝字符；缓冲器+；NUMIXCHAR+++；}返回NUMIXCHAR；} UART在编辑while循环时工作良好。它不经过编辑而通过while循环，但挂在UARTERCEDVDATAISIS可用（UART5）中，同时循环…RX缓冲区什么都没有？谢谢你的时间！



      以下为原文

    The UART call used is as follows, this is all at the top of main()
 
//configs for UART
 
num = INTDisableInterrupts();
while(PORTEbits.RE8 == 1);
 
numBytes = GetDataBuffer(buf, sizeof(buf);
 
UINT GetDataBuffer(char *buffer, UINT32 max_size){
       UINT32 num_char;
       num_char = 0;
 
       while(num_char < max_size)
      {
             UINT8 character;
             while(!UARTReceivedDataIsAvailable(UART5)):
             character = UARTGetDataByte(UART5);
             if(character == '')
                   break;
             *buffer = character;
             buffer++;
             num_char++;
 
      }
      return num_char;
}
 
The UART works fine with the while loop edited out. It does pass the while loop when not edited out but hangs in the UARTReceivedDataIsAvailable(UART5)  while loop... nothing in rx buffer?
 
Thanks for your time!
 
 
 
 
 
 
          

试着检查UART的ORR标志。我怀疑你在等待的时候正在接收字符，并得到一个溢出错误。很明显，你正在使用轮询模式下的USAT，因为它不能在中断模式下工作，并且中断中断。



      以下为原文

    Try checking the UART's OERR flag.
I suspect you are receiving characters while you're waiting, and getting an overrun error.
Plainly you are using the USART in polling mode, as it couldn't work in interrupt mode with interrupts disabled.

这里是完整的代码。感谢查看/ /配置位设置///SysCLK＝80兆赫（10MHz振荡器/FPLLIDIV*FPLLMUL/FPLLoDIV）//PBCK＝40 MHz / WDT。UL1616/PLAL，PLFLIDEV＝DIVIL2/L/PLL输入除法器Tux*** PrimaTrac-FigLogo＝DIVIO1/PL/L输出分频器***** PrimaTrac-FigDig.FPPDIV＝DIVII1//外围时钟除数*Pract** PrimaMac配置FFDTEN= OF//看门狗定时器***看门狗定时器后尺度，FCKSM＝CSEMEM//CSDCMD（I2C）//CSEME（UART）/时钟切换和故障安全时钟监视器，Trac-Mac，ON/OFF（I2C）上（UART）//CKO使能，γ-PracMA配置，POSCMOD＝XT//XT（UART）HS（I2C）/主振荡器关闭，用于内部8MHz的PRA。GMA配置IOSO = /OF//内部切换/外部切换OF/OFF（IART）OFF（I2C）OFF（I2C）/ /次振荡器使能，用于外置/ FRCPLL内部的α-PracMA配置CPP＝OF//代码保护PYPLAGMA配置BWP＝OF//BOOSTFLASH写保护PWP＝OF//程序闪存写保护OXPRAGMA配置ICICEL＝ICSYPGX2//ICE/ICD COMM通道选择Suff-PrimaMac配置调试=关闭/ /调试器禁用为启动器套件{ Endof//OrdReDeFixBITSHINT主（空）{//SysSCONFIG（80000000，SyssiCFGyALL）；//本地VAUINTHINUTHEXECUTALL时钟；UINT8 MODSTATUS；UINT8 FILSTATION；/UART变量UINT32 MUNULIONE；UINT8 BUF（1024）；UINT8主菜单；UINT32 NUBYTESS UART；UINT32 NUTBUME；UINT32 TESTNUM1；UINT32 TUBYTES1；UINT32 NUMYS2；UINT32 NUMY3；INTI U/UART UARTConfigure（UART5，UARTHYNEABLE，PPSIXTXRXXILIN）；UARTSetFifoMode（UART5，UARTHYSTATOTHON TXXNOTHULL）UARTHYSTORCTONYORXNOTSULL；UARTSetLineControl（UART5，UARTHYDATA SIEZE88BIT位UARTHARPARITY NONE UARTHARSTOP BITSY1）；UARTSetDataRate（UART5，GETEnEurralCcOffice（57600））；UARTEnable（UART5，UARTZI）EnableμFLAG（UARTHULL UARTURX RXX UARTARTX）；//TestNUM= ItDeABLE中断（）；//ASM易失性（“DI”）；///Load模块退出重置TrIScTys.TrISC14＝0；PoxcBys.RC14＝1；/////初始化调试消息（当支持）//dBIN（）；// /设置I2C BurdRe/ /StudialCalth= I2CSETFISH（I2CYBUS，GETPurialAlcClice），I/ABS（ActualClCK-I2CY-ClOXYFRIQ）& I2CyClcLog-Frq/10）//{//DbPrimTf（“错误：I2C1时钟频率（%u）错误超过10% %.n”，（未签名）实际时钟）；//} TestNoMy1＝InDeBable中断（）；（/PotoBITS.Re8=＝1）；/ /等待从RCP//********************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************Head SurvivFr.Hy.y*定义了一个定义为（定义为32×Mx460f512L1）的μHyrWord PrimeLIX Hy//Hyb常数，定义了SysSyLoCH（800 000 000 0L）αELIF定义的（α32×Mx220f032 d1）定义（α32×Mx）= 0）{int x＝0；x= NuthBytheUART＋1；} }定义了SysSyLoCH（400 000 000 L）的π介子，定义了GETSealCyClice（），定义了GETEndoSeralClOK（）（GETStaseClClice）（1 & lt；& OcCONTROS.PBDIV）// 80000000 //Oy定义GeDealErralClOffice（）（SysSyCl/ 2）/ 40000000 40000000定义GealEn指令ClClice（）（SysSythClice）定义I2CyClcLogyFRIQ 350000／／。延迟常数γ定义CPU-CHILKYHZ（800 000 000 UL）定义CPUPUCPHYZ（CPU-CUROCHYHZ／2），定义外围时钟CR（400 000 000 UL），定义USO toToCTJ（CPUYCPUHZ/10000 00 UL）/从属常数，定义I2CI总线I2C5//PIC32 I2C模块5，定义I2CYRCPIP地址0x64／/0B01100100控制处理器地址/I2C常数定义了产品ID“WCC11100000”，定义了CyrMdService“显示服务”，定义了I2CX Read EngRead Bug大小8，定义了I2CYRCPUTIMOUT 500毫秒，定义了I2CYDATAWAWRADEWEZE大小254 254，定义了I2CYDATAAdRead大小为254，定义了Apple PototBy.R8/ /注意线定义CMDWRead Engule0x01*定义CMDWRead Endox 0x01*定义CMDARead标头0x82*定义CMDARead数据0x82.



      以下为原文

    Here is the full code.
Thanks for looking.
 
// Configuration Bit settings
//
// SYSCLK = 80 MHz (10MHz Oscillator/ FPLLIDIV * FPLLMUL / FPLLODIV)
// PBCLK = 40 MHz
// WDT OFF
 
#ifndef OVERRIDE_CONFIG_BITS
   
    //**************************************************************************
    #pragma config FPLLMUL  = MUL_16        // PLL Multiplier       ******
    #pragma config FPLLIDIV = DIV_2         // PLL Input Divider    ******
    #pragma config FPLLODIV = DIV_1         // PLL Output Divider   ******
    #pragma config FPBDIV   = DIV_1         // Peripheral Clock divisor ******
    #pragma config FWDTEN   = OFF           // Watchdog Timer           ******
    #pragma config WDTPS    = PS1           // Watchdog Timer Postscale
    #pragma config FCKSM    = CSECME        // CSDCMD (i2c) // CSECME (uart)     // Clock Switching & Fail Safe Clock Monitor
    #pragma config OSCIOFNC = ON            //OFF (i2c) ON(uart)  // CLKO Enable
    #pragma config POSCMOD  =  XT           // XT(uart) HS(i2c) // Primary Oscillator Off for internal 8MHz
    #pragma config IESO     = OFF           // Internal/External Switch-over
    #pragma config FSOSCEN  = OFF           // ON(uart) OFF(i2c)// Secondary Oscillator Enable
    #pragma config FNOSC    = PRIPLL        // Oscillator Selection  PRIPLL for external/ FRCPLL internal
    #pragma config CP       = OFF           // Code Protect
    #pragma config BWP      = OFF           // Boot Flash Write Protect
    #pragma config PWP      = OFF           // Program Flash Write Protect
    #pragma config ICESEL   = ICS_PGx2      // ICE/ICD Comm Channel Select
    #pragma config DEBUG    = OFF           // Debugger Disabled for Starter Kit
           
#endif // OVERRIDE_CONFIG_BITS

int main(void)
{
//    SYSTEMConfig(80000000,SYS_CFG_ALL);
   
    // local variables
    UINT32              actualClock;
    UINT8               HandshakeStatus;
    UINT8               ModeStatus;
    UINT8               FillStatus;
   
    //UART variables
    UINT32              menu_choice;
    UINT8               buf[1024];
   
    UINT8               mainMenu;
    UINT32              numBytes_uart;
    UINT32              numBytes;
    UINT32              testnum;
    UINT32              testnum_1;
    UINT32              numBytes_1;
    UINT32              num_2;
    UINT32              num_3;
    int                 i;
   
    //UART
    UARTConfigure(UART5, UART_ENABLE_PINS_TX_RX_ONLY);
    UARTSetFifoMode(UART5,UART_INTERRUPT_ON_TX_NOT_FULL | UART_INTERRUPT_ON_RX_NOT_EMPTY);
    UARTSetLineControl(UART5, UART_DATA_SIZE_8_BITS | UART_PARITY_NONE | UART_STOP_BITS_1);   
    UARTSetDataRate(UART5, GetPeripheralClock(),57600);
    UARTEnable(UART5, UART_ENABLE_FLAGS(UART_PERIPHERAL | UART_RX | UART_TX));
  
   
//    testnum = INTDisableInterrupts();
   
 //   asm volatile ("di");
   
//   
    // pull module out of reset
    TRISCbits.TRISC14 = 0;
    PORTCbits.RC14 = 1;
//
//    // Initialize debug messages (when supported)
//    DBINIT();   
//
//    // Set the I2C baudrate
//    actualClock = I2CSetFrequency(I2C_BUS, GetPeripheralClock(), I2C_CLOCK_FREQ);
//    if ( abs(actualClock-I2C_CLOCK_FREQ) > I2C_CLOCK_FREQ/10 )
//    {
//        DBPRINTF("Error: I2C1 clock frequency (%u) error exceeds 10%%.n", (unsigned)actualClock);
//    }
   
      testnum_1 = INTDisableInterrupts();
     
       while(PORTEbits.RE8 == 1);// wait for initial message from RCP
     
       //*************************************************************************** 
            for(;;) {
            for(i=0;i<1024; i++){
              buf = 0;
            }
           
            numBytes_uart = GetDataBuffer(buf, sizeof(buf));
            if(numBytes_uart != 0) {
                int x = 0;
                x = numBytes_uart + 1;
            }
        }
 
HEADER FILE
#ifndef __HARDWAREPROFILE_H_
#define __HARDWAREPROFILE_H_
// Clock Constants
#if defined (__32MX460F512L__) || defined (__32MX360F512L__) || defined (__32MX795F512L__)
#define SYS_CLOCK (80000000L)
#elif defined (__32MX220F032D__) || defined (__32MX250F128D__)
#define SYS_CLOCK (40000000L)
#endif
#define GetSystemClock()            (SYS_CLOCK)
#define GetPeripheralClock()        (GetSystemClock()/(1 << OSCCONbits.PBDIV))// 80000000
//#define GetPeripheralClock()        (SYS_CLOCK/2) // 40000000
#define GetInstructionClock()       (SYS_CLOCK)
#define I2C_CLOCK_FREQ              350000
// Delay Constants
#define CPU_CLOCK_HZ                (80000000UL)
#define CPU_CPU_HZ                  (CPU_CLOCK_HZ/2)
#define PERIPHERAL_CLOCK_HZ         (40000000UL)
#define US_TO_CT_TICKS              (CPU_CPU_HZ/ 1000000UL)

// Slave Constants
#define I2C_BUS                     I2C5       // PIC32 I2C Module 5
#define I2C_RCP_ADDRESS             0x64       // 0b01100100  Control Processor address
//  I2C Constants
#define PRODUCT_ID                  "WCC111000000000"
#define SERIAL_NUMBER               "012300000000000"
#define CLICMD_SERVICE              "show service"
#define I2C_WRITE_BLOCK_SIZE        8
#define I2C_RCP_TIMEOUT             500mS
#define I2C_DATA_WRITE_SIZE         254
#define I2C_DATA_READ_SIZE          254
#define ATTN                        PORTEbits.RE8// attention line from RCP
#define CMD_WRITE_HEADER            0x01
#define CMD_WRITE_DATA              0x01
#define CMD_READ_HEADER             0X82
#define CMD_READ_DATA               0x82
   

请附上代码与标签[代码]和[ /代码]（没有空格）。这将使代码更加可读，更重要的是保持显示为：BUF＝0；打开斜体字。



      以下为原文

    Please enclose code with the tags [ code] and [ /code] (without the spaces). This will make the code much more readable, and more importantly keep
   buf = 0;
from displaying as;
buf = 0;
and turning on italics

      以下为原文

    // Configuration Bit settings
//
// SYSCLK = 80 MHz (10MHz Oscillator/ FPLLIDIV * FPLLMUL / FPLLODIV)
// PBCLK = 40 MHz
// WDT OFF



#ifndef OVERRIDE_CONFIG_BITS
    

    //**************************************************************************
    #pragma config FPLLMUL = MUL_16 // PLL Multiplier ******
    #pragma config FPLLIDIV = DIV_2 // PLL Input Divider ******
    #pragma config FPLLODIV = DIV_1 // PLL Output Divider ******
    #pragma config FPBDIV = DIV_1 // Peripheral Clock divisor ******
    #pragma config FWDTEN = OFF // Watchdog Timer ******
    #pragma config WDTPS = PS1 // Watchdog Timer Postscale
    #pragma config FCKSM = CSECME // CSDCMD (i2c) // CSECME (uart) // Clock Switching & Fail Safe Clock Monitor
    #pragma config OSCIOFNC = ON //OFF (i2c) ON(uart) // CLKO Enable
    #pragma config POSCMOD = XT // XT(uart) HS(i2c) // Primary Oscillator Off for internal 8MHz
    #pragma config IESO = OFF // Internal/External Switch-over
    #pragma config FSOSCEN = OFF // ON(uart) OFF(i2c)// Secondary Oscillator Enable
    #pragma config FNOSC = PRIPLL // Oscillator Selection PRIPLL for external/ FRCPLL internal
    #pragma config CP = OFF // Code Protect
    #pragma config BWP = OFF // Boot Flash Write Protect
    #pragma config PWP = OFF // Program Flash Write Protect
    #pragma config ICESEL = ICS_PGx2 // ICE/ICD Comm Channel Select
    #pragma config DEBUG = OFF // Debugger Disabled for Starter Kit
            
#endif // OVERRIDE_CONFIG_BITS


int main(void)
{
// SYSTEMConfig(80000000,SYS_CFG_ALL);
    
    // local variables
    UINT32 actualClock;
    UINT8 HandshakeStatus;
    UINT8 ModeStatus;
    UINT8 FillStatus;
    
    //UART variables
    UINT32 menu_choice;
    UINT8 buf[1024];
    
    UINT8 mainMenu;
    UINT32 numBytes_uart;
    UINT32 numBytes;
    UINT32 testnum;
    UINT32 testnum_1;
    UINT32 numBytes_1;
    UINT32 num_2;
    UINT32 num_3;
    int i;
    
    //UART
    UARTConfigure(UART5, UART_ENABLE_PINS_TX_RX_ONLY);
    UARTSetFifoMode(UART5,UART_INTERRUPT_ON_TX_NOT_FULL | UART_INTERRUPT_ON_RX_NOT_EMPTY);
    UARTSetLineControl(UART5, UART_DATA_SIZE_8_BITS | UART_PARITY_NONE | UART_STOP_BITS_1);
    UARTSetDataRate(UART5, GetPeripheralClock(),57600);
    UARTEnable(UART5, UART_ENABLE_FLAGS(UART_PERIPHERAL | UART_RX | UART_TX));
   
    
// testnum = INTDisableInterrupts();
    
 // asm volatile ("di");
    
//
    // pull module out of reset
    TRISCbits.TRISC14 = 0;
    PORTCbits.RC14 = 1;
//
// // Initialize debug messages (when supported)
// DBINIT();
//
// // Set the I2C baudrate
// actualClock = I2CSetFrequency(I2C_BUS, GetPeripheralClock(), I2C_CLOCK_FREQ);
// if ( abs(actualClock-I2C_CLOCK_FREQ) > I2C_CLOCK_FREQ/10 )
// {
// DBPRINTF("Error: I2C1 clock frequency (%u) error exceeds 10%%.n", (unsigned)actualClock);
// }
    
      testnum_1 = INTDisableInterrupts();
      
       while(PORTEbits.RE8 == 1);// wait for initial message from RCP
      
       //***************************************************************************
            for(;;) {

            for(i=0;i<1024; i++){
              buf = 0;
            }
            
            numBytes_uart = GetDataBuffer(buf, sizeof(buf));

            if(numBytes_uart != 0) {
                int x = 0;

                x = numBytes_uart + 1;
            }
        }



HEADER FILE

#ifndef __HARDWAREPROFILE_H_
#define __HARDWAREPROFILE_H_

// Clock Constants
#if defined (__32MX460F512L__) || defined (__32MX360F512L__) || defined (__32MX795F512L__)
#define SYS_CLOCK (80000000L)
#elif defined (__32MX220F032D__) || defined (__32MX250F128D__)
#define SYS_CLOCK (40000000L)
#endif

#define GetSystemClock() (SYS_CLOCK)
#define GetPeripheralClock() (GetSystemClock()/(1 << OSCCONbits.PBDIV))// 80000000
//#define GetPeripheralClock() (SYS_CLOCK/2) // 40000000
#define GetInstructionClock() (SYS_CLOCK)
#define I2C_CLOCK_FREQ 350000

// Delay Constants
#define CPU_CLOCK_HZ (80000000UL)
#define CPU_CPU_HZ (CPU_CLOCK_HZ/2)
#define PERIPHERAL_CLOCK_HZ (40000000UL)
#define US_TO_CT_TICKS (CPU_CPU_HZ/ 1000000UL)


// Slave Constants
#define I2C_BUS I2C5 // PIC32 I2C Module 5
#define I2C_RCP_ADDRESS 0x64 // 0b01100100 Receiver Control Processor address

// I2C Constants
#define PRODUCT_ID "WPA111000000000"
#define SERIAL_NUMBER "012300000000000"

#define CLICMD_SERVICE "show service"

#define I2C_WRITE_BLOCK_SIZE 8
#define I2C_RCP_TIMEOUT 500mS
#define I2C_DATA_WRITE_SIZE 254
#define I2C_DATA_READ_SIZE 254
#define ATTN PORTEbits.RE8// attention line from RCP
#define CMD_WRITE_HEADER 0x01
#define CMD_WRITE_DATA 0x01
#define CMD_READ_HEADER 0X82
#define CMD_READ_DATA 0x82