DSP 2812 串口方式怎么发生数据的（没辙了）
这个代码能一直接收到0xaa；问题在于我在主程序没有发送数据怎么就进入发生中断服务中了呢？？？还有我把发送中断的 SciaRegs.SCITXBUF=0xaa;注释掉，并在主函数中加入这句；但是从串口一个没收到
这个还不和单片即一样吗？？？
#include "DSP281x_Device.h" // DSP281x Headerfile Include File
#include "DSP281x_Examples.h" // DSP281x Examples Include File
#include "stdio.h"
#define CPU_FREQ 150E6
#define LSPCLK_FREQCPU_FREQ/4
#define SCI_FREQ 9600//100E3 //波特率
#define SCI_PRD ((LSPCLK_FREQ/(SCI_FREQ*8))-1)
// Prototype statements for functions found within this file.
interrupt void sciaTxFifoIsr(void);
interrupt void sciaRxFifoIsr(void);
void scia_fifo_init(void);
// Global variables
void main(void)
{
// Step 1. Initialize System Control:
// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the DSP281x_SysCtrl.c file.
InitSysCtrl();
// Step 2. Initalize GPIO:
// This example function is found in the DSP281x_Gpio.c file and
// illustrates how to set the GPIO to it's default state.
// InitGpio();
// Setup only the GP I/O only for SCI-A and SCI-B functionality
EALLOW;
GpioMuxRegs.GPFMUX.bit.SCITXDA_GPIOF4 = 1;
GpioMuxRegs.GPFMUX.bit.SCIRXDA_GPIOF5 = 1;
GpioMuxRegs.GPGMUX.bit.SCITXDB_GPIOG4 = 1;
GpioMuxRegs.GPGMUX.bit.SCIRXDB_GPIOG5 = 1;
EDIS;
// 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 DSP281x_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 DSP281x_DefaultIsr.c.
// This function is found in DSP281x_PieVect.c.
InitPieVectTable();
// Interrupts that are used in this example are re-mapped to
// ISR functions found within this file.
EALLOW; // This is needed to write to EALLOW protected registers
PieVectTable.RXAINT = &sciaRxFifoIsr;
PieVectTable.TXAINT = &sciaTxFifoIsr;
EDIS; // This is needed to disable write to EALLOW protected registers
// Step 4. Initialize all the Device Peripherals:
// This function is found in DSP281x_InitPeripherals.c
// InitPeripherals(); // Not required for this example
scia_fifo_init();// Init SCI-A
// Step 5. User specific code, enable interrupts:
// Enable interrupts required for this example
PieCtrlRegs.PIECRTL.bit.ENPIE = 1; // Enable the PIE block
PieCtrlRegs.PIEIER9.bit.INTx1=1; // PIE Group 9, INT1
PieCtrlRegs.PIEIER9.bit.INTx2=1; // PIE Group 9, INT2
IER = 1<<(9-1); // Enable CPU INT
PieCtrlRegs.PIEACK.all|=0x100; // Issue PIE ACK 0x100=1 0000 0000
EINT;
// Step 6. IDLE loop. Just sit and loop forever (optional):
for(;;);
}
interrupt void sciaTxFifoIsr(void)
{
SciaRegs.SCITXBUF=0xaa;
SciaRegs.SCIFFTX.bit.TXINTCLR=1; // Clear SCI Interrupt flag
PieCtrlRegs.PIEACK.all|=0x100; // Issue PIE ACK 0x100=1 0000 0000
}
interrupt void sciaRxFifoIsr(void)
{
//Add user code here
Uint16 i;
i=SciaRegs.SCIRXBUF.all; // Read data
SciaRegs.SCIFFRX.bit.RXFFOVRCLR=1; // Clear Overflow flag 清除溢出标志
SciaRegs.SCIFFRX.bit.RXFFINTCLR=1; // Clear Interrupt flag
PieCtrlRegs.PIEACK.all|=0x100; // Issue PIE ack
}
void scia_fifo_init()
{
SciaRegs.SCICCR.all =0x0007; // 1 stop bit,No loopback
// No parity,8 char bits,
// async mode, idle-line protocol
SciaRegs.SCICTL1.all =0x0003;// enable TX, RX, internal SCICLK,
// Disable RX ERR, SLEEP, TXWAKE
SciaRegs.SCICTL2.bit.TXINTENA =1; //Transmit interrupt enable
SciaRegs.SCICTL2.bit.RXBKINTENA =1; // Receiver Or buffer break interrupt enable
SciaRegs.SCIHBAUD =0x0001;//高 8 位
SciaRegs.SCILBAUD =0x00E7;//低 8 位
SciaRegs.SCICCR.bit.LOOPBKENA =0; // Disable loop back
//Interrupt level:1 发送FIFO深度为8字节
//FIFO Interrupt enable
//Enhancement enable
//SCI reset rx/tx channels
SciaRegs.SCIFFTX.all=0xC021; //1100 0000 0010 0001
SciaRegs.SCIFFRX.all=0x0021;
SciaRegs.SCIFFCT.all=0x00;
SciaRegs.SCICTL1.all =0x0023; // Relinquish SCI from Reset
SciaRegs.SCIFFTX.bit.TXFIFOXRESET=1;
SciaRegs.SCIFFRX.bit.RXFIFORESET=1;
}
//===========================================================================
// No more.
//=========================================================================== 解决了。我看错了，我把FIFO中断看出发送中断了。
后加：
我想把串口中断的服务程序放在sci.c中，但在哪里声明啊，在sci.h中吗；我看sci.h放有很多东西啊
请高手帮帮我，你们是放在哪里的
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