代码如下 通过while循环不断对SCITXBUF写数据 那么我观察寄存器里的值应该是不断变化的 但是实际运行时寄存器内的值无变化 PC端接受不到数据
#include "DSP28x_Project.h" // Device Headerfile and Examples Include File
void main(void)
{
// Uint16 ReceivedChar;
// char *msg;
// Step 1. Initialize System Control:
// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the DSP2833x_SysCtrl.c file.
InitSysCtrl();
// Step 2. Initalize GPIO:
// This example function is found in the DSP2833x_Gpio.c file and
// illustrates how to set the GPIO to it's default state.
// InitGpio(); Skipped for this example
// For this example, only init the pins for the SCI-A port.
// This function is found in the DSP2833x_Sci.c file.
InitScibGpio();
// Step 3. Clear all interrupts and initialize PIE vector table:
// Disable CPU interrupts
DINT;
// Initialize PIE control registers to their default state.
// The default state is all PIE interrupts disabled and flags
// are cleared.
// This function is found in the DSP2833x_PieCtrl.c file.
InitPieCtrl();
// Disable CPU interrupts and clear all CPU interrupt flags:
IER = 0x0000;
IFR = 0x0000;
// Initialize the PIE vector table with pointers to the shell Interrupt
// Service Routines (ISR).
// This will populate the entire table, even if the interrupt
// is not used in this example. This is useful for debug purposes.
// The shell ISR routines are found in DSP2833x_DefaultIsr.c.
// This function is found in DSP2833x_PieVect.c.
InitPieVectTable();
ScibRegs.SCICCR.bit.STOPBITS=0;
ScibRegs.SCICCR.bit.PARITYENA=0;
ScibRegs.SCICCR.bit.SCICHAR=7;
ScibRegs.SCICTL1.bit.RXENA=1;
ScibRegs.SCICTL1.bit.TXENA=1;
ScibRegs.SCIHBAUD=0X0001;
ScibRegs.SCILBAUD=0X00E7;
ScibRegs.SCICTL1.bit.TXWAKE=1;
ScibRegs.SCICTL1.bit.SWRESET=1;
ScibRegs.SCITXBUF = 0x2;
while(1)
{DELAY_US(200);
ScibRegs.SCITXBUF=0x5;
DELAY_US(200);
ScibRegs.SCITXBUF=0x2;
DELAY_US(200);
ScibRegs.SCITXBUF=0x3;
}
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