TI中文支持网我使用的是28027，用查询TXRDY为1时发送数据的方法发数据。但是一直差两个字节，就像被FIFO扣住两个字节一样，但是没开FIFO并且试过加上明确关FIFO的语句也没成功。要发送完整的数据就必须加发两个字节。程序是修改例程的。请问有可能是什么原因造成的。
囧：
楼主，请把你的SCI初始化代码贴出以便大家进行错误分析，谢谢！
我使用的是28027，用查询TXRDY为1时发送数据的方法发数据。但是一直差两个字节，就像被FIFO扣住两个字节一样，但是没开FIFO并且试过加上明确关FIFO的语句也没成功。要发送完整的数据就必须加发两个字节。程序是修改例程的。请问有可能是什么原因造成的。
Junjie Li：
回复 囧:
贴出了部分程序，发3个字节只能收到第一个，发4个只能收到前两个，发2个及以下都收不到。
void main( void )
{
myAdc = ADC_init((void *)ADC_BASE_ADDR, sizeof(ADC_Obj));
myClk = CLK_init((void *)CLK_BASE_ADDR, sizeof(CLK_Obj));
myCpu = CPU_init((void *)NULL, sizeof(CPU_Obj));
myFlash = FLASH_init((void *)FLASH_BASE_ADDR, sizeof(FLASH_Obj));
myGpio = GPIO_init((void *)GPIO_BASE_ADDR, sizeof(GPIO_Obj));
myPie = PIE_init((void *)PIE_BASE_ADDR, sizeof(PIE_Obj));
myPll = PLL_init((void *)PLL_BASE_ADDR, sizeof(PLL_Obj));
mySci = SCI_init((void *)SCIA_BASE_ADDR, sizeof(SCI_Obj));
myWDog = WDOG_init((void *)WDOG_BASE_ADDR, sizeof(WDOG_Obj));
myTimer = TIMER_init((void *)TIMER0_BASE_ADDR, sizeof(TIMER_Obj));
// Perform basic system initialization
WDOG_disable(myWDog);
CLK_enableAdcClock(myClk);
(*Device_cal)();
CLK_enableCpuTimerClock(myClk,CLK_CpuTimerNumber_0);
//Select the internal oscillator 1 as the clock source
CLK_setOscSrc(myClk, CLK_OscSrc_Internal);
// Setup the PLL for x12 /2 which will yield 60Mhz = 10Mhz * 12 / 2
PLL_setup(myPll, PLL_Multiplier_12, PLL_DivideSelect_ClkIn_by_2);
// Disable the PIE and all interrupts
PIE_disable(myPie);
PIE_disableAllInts(myPie);
CPU_disableGlobalInts(myCpu);
CPU_clearIntFlags(myCpu);
// If running from flash copy RAM only functions to RAM
#ifdef _FLASH
memcpy(&RamfuncsRunStart, &RamfuncsLoadStart, (size_t)&RamfuncsLoadSize);
#endif
// This example is a basic pinout
//Gpio_setup2();
Gpio_setup1();
// Initalize GPIO
GPIO_setPullUp(myGpio, GPIO_Number_28, GPIO_PullUp_Enable);
GPIO_setPullUp(myGpio, GPIO_Number_29, GPIO_PullUp_Enable);
GPIO_setQualification(myGpio, GPIO_Number_28, GPIO_Qual_ASync);
GPIO_setMode(myGpio, GPIO_Number_28, GPIO_28_Mode_SCIRXDA);
GPIO_setMode(myGpio, GPIO_Number_29, GPIO_29_Mode_SCITXDA);
// Setup a debug vector table and enable the PIE
PIE_setDebugIntVectorTable(myPie);
PIE_enable(myPie);
PIE_registerPieIntHandler(myPie, PIE_GroupNumber_1, PIE_SubGroupNumber_7, (intVec_t)&cpu_timer0_isr);//—————————–
PIE_enableTimer0Int(myPie);
// Configure CPU-Timer 0 to interrupt every 500 milliseconds:
// 60MHz CPU Freq, 50 millisecond Period (in uSeconds)
// ConfigCpuTimer(&CpuTimer0, 60, 500000);
TIMER_stop(myTimer);
TIMER_setPeriod(myTimer, (uint32_t)(240625));//240625
TIMER_setPreScaler(myTimer, 0);
CpuTimer0Regs.TCR.bit.TRB = 1;
// TIMER_reload(myTimer);
TIMER_setEmulationMode(myTimer, TIMER_EmulationMode_StopAfterNextDecrement);
// TIMER_enableInt(myTimer);
// TIMER_start(myTimer);
vMBPortSerialEnable( 1, 0 );
// Register interrupt handlers in the PIE vector table
PIE_registerPieIntHandler(myPie, PIE_GroupNumber_9, PIE_SubGroupNumber_1, (intVec_t)&sciaRxFifoIsr);
// Enable interrupts required for this example
PIE_enableInt(myPie, PIE_GroupNumber_9, PIE_InterruptSource_SCIARX);
CPU_enableInt(myCpu, CPU_IntNumber_9);
CPU_enableInt(myCpu, CPU_IntNumber_1);
CPU_enableGlobalInts(myCpu);
CPU_enableDebugInt(myCpu);
scia_echoback_init();
SCI_putDataBlocking(mySci, 0x01);
while( j < 50)
{
usRegHoldingBuf[ j ] = j;
j++;
}
usRegHoldingBuf[ LCD_WIFI_485_IO + 1] = RS485;
vMBPortSerialEnable( 0, 1 ); //开启发送关闭接收
scia_xmit((unsigned char *)"abcde", 3);
vMBPortSerialEnable( 1, 0 ); //开启接收关闭发送
while(1)
if( Recieved )
{
Transport_Protocols( &usRegHoldingBuf[ LCD_WIFI_485_IO ] );
Recieved = 0;
}
}
void Gpio_setup1(void)
{
// Example 1:
// Basic Pinout.
// These can be combined into single statements for improved
// code efficiency.
GPIO_setHigh(myGpio, GPIO_Number_0);
GPIO_setHigh(myGpio, GPIO_Number_1);
GPIO_setHigh(myGpio, GPIO_Number_2);
GPIO_setHigh(myGpio, GPIO_Number_3);
GPIO_setMode(myGpio, GPIO_Number_0, GPIO_12_Mode_GeneralPurpose);
GPIO_setMode(myGpio, GPIO_Number_1, GPIO_12_Mode_GeneralPurpose);
GPIO_setMode(myGpio, GPIO_Number_2, GPIO_12_Mode_GeneralPurpose);
GPIO_setMode(myGpio, GPIO_Number_3, GPIO_12_Mode_GeneralPurpose);
GPIO_setDirection(myGpio, GPIO_Number_0, GPIO_Direction_Output);
GPIO_setDirection(myGpio, GPIO_Number_1, GPIO_Direction_Output);
GPIO_setDirection(myGpio, GPIO_Number_2, GPIO_Direction_Output);
GPIO_setDirection(myGpio, GPIO_Number_3, GPIO_Direction_Output);
// Enable an GPIO output on GPIO6&7, set it high
GPIO_setHigh(myGpio, GPIO_Number_12);
GPIO_setMode(myGpio, GPIO_Number_12, GPIO_12_Mode_GeneralPurpose);
GPIO_setDirection(myGpio, GPIO_Number_12, GPIO_Direction_Output);
}
void scia_echoback_init()
{
CLK_enableSciaClock(myClk);
// 1 stop bit, No loopback
// No parity,8 char bits,
// async mode, idle-line protocol
SCI_disableParity(mySci);
SCI_setNumStopBits(mySci, SCI_NumStopBits_One);
SCI_setCharLength(mySci, SCI_CharLength_8_Bits);
SCI_enableTx(mySci);
SCI_enableRx(mySci);
SCI_enableTxInt(mySci);
SCI_enableRxInt(mySci);
SCI_setTxFifoIntLevel(mySci, SCI_FifoLevel_Empty); //关闭FIFO
SCI_disableFifoEnh(mySci);
SCI_disableTxFifoInt(mySci);
// SCI BRR = LSPCLK/(SCI BAUDx8) – 1
#if (CPU_FRQ_60MHZ)
SCI_setBaudRate(mySci, SCI_BaudRate_9_6_kBaud);
#elif (CPU_FRQ_50MHZ)
SCI_setBaudRate(mySci, (SCI_BaudRate_e)162);
#elif (CPU_FRQ_40MHZ)
SCI_setBaudRate(mySci, (SCI_BaudRate_e)129);
#endif
SCI_enable(mySci);
return;
}
void scia_xmit(unsigned char * Cbuffer, unsigned char n)
{
int i = 0;
while( i < n )
{
SCI_putDataBlocking(mySci, Cbuffer[ i++ ]);
}
}
/***********************************************************
*
*
*
***********************************************************/
unsigned char vMBPortSerialEnable( unsigned char xRxEnable, unsigned char xTxEnable )
{
EnterCriticalSection( );
unsigned char Error = 0;
if( xRxEnable && (!xTxEnable))
{
GPIO_setLow(myGpio, GPIO_Number_12);
SCI_disableTx(mySci);
SCI_disableTxInt(mySci);
SCI_enableRx(mySci);
SCI_enableRxInt(mySci);
}
else if( xTxEnable && (!xRxEnable))
{
GPIO_setHigh(myGpio, GPIO_Number_12);
SCI_disableRx(mySci);
SCI_disableRxInt(mySci);
SCI_enableTx(mySci);
SCI_enableTxInt(mySci);
}
else
{
Error = 1;
}
ExitCriticalSection( );
return Error;
}
