TSM320f28335的SCIb和SCIc查询发现中断接收
本帖最后由 daidaimumu 于 2013-7-25 21:23 编辑TSM320f28335的SCIb和SCIc查询发现中断接收使用FIFO功能的简单例程
#include "DSP2833x_Device.h" // DSP2833x Headerfile Include File
#include "DSP2833x_Examples.h" // DSP2833x Examples Include File
// Prototype statements for functions found within this file.
void scic_echoback_init(void);
void scib_echoback_init(void);
void scic_fifo_init(void);
void scib_fifo_init(void);
void scic_xmit(int a);
void scic_msg(char *msg);
void scib_xmit(int a);
void scib_msg(char *msg);
interrupt void scib_INT(void);
interrupt void scic_INT(void);
// Global counts used in this example
Uint16 LoopCount;
Uint16 ErrorCount;
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();
InitScicGpio();
InitXintf16Gpio();
// 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();
EALLOW;
PieVectTable.SCIRXINTB= &scib_INT; //SCIB 接收 中断入口地址
PieVectTable.SCIRXINTC= &scic_INT; //SCIC 接收 中断入口地址
EDIS;
// Step 4. Initialize all the Device Peripherals:
// This function is found in DSP2833x_InitPeripherals.c
// InitPeripherals(); // Not required for this example
// Step 5. User specific code:
LoopCount = 0;
ErrorCount = 0;
scic_fifo_init(); // Initialize the SCI FIFO
scic_echoback_init();// Initalize SCI for echoback
scib_fifo_init();
scib_echoback_init();
PieCtrlRegs.PIEIER9.bit.INTx3=1; // PIE Group 9, INT3 使能PIE模块的SCIB 接收中断
PieCtrlRegs.PIEIER8.bit.INTx5=1; //PIE Group 8, INT5使能PIE模块的SCIC 接收中断
IER |= M_INT9; //开CPU中断 Group9 对应SCIB 中断
IER |= M_INT8; //开CPU中断 Group8 对应SCIC 中断
msg = "\r\n\n\nHello Yan Xu!\0";
scic_msg(msg);
scib_msg(msg);
msg = "\r\nYou will enter a character, and the DSP will echo it back! \n\0";
scic_msg(msg);
scib_msg(msg);
// Enable global Interrupts and higher priority real-time debug events:
EINT; // Enable Global interrupt INTM开全局中断
ERTM; // Enable Global realtime interrupt DBGM开全局实时中断
for(;;)
{
LoopCount++;
}
}
// Test 1,SCIADLB, 8-bit word, baud rate 0x000F, default, 1 STOP bit, no parity
void scic_echoback_init()
{
// Note: Clocks were turned on to the SCIA peripheral
// in the InitSysCtrl() function
//scic
ScicRegs.SCICCR.all =0x0007; // 1 stop bit,No loopback
// No parity,8 char bits,
// async mode, idle-line protocol
ScicRegs.SCICTL1.all =0x0003;// enable TX, RX, internal SCICLK,
// Disable RX ERR, SLEEP, TXWAKE
ScicRegs.SCICTL2.all =0x0003;
ScicRegs.SCICTL2.bit.TXINTENA = 0;
ScicRegs.SCICTL2.bit.RXBKINTENA =1;
#if (CPU_FRQ_150MHZ)
ScicRegs.SCIHBAUD =0x0001;// 9600 baud @LSPCLK = 37.5MHz.
ScicRegs.SCILBAUD =0x00E7;
#endif
#if (CPU_FRQ_100MHZ)
ScicRegs.SCIHBAUD =0x0001;// 9600 baud @LSPCLK = 20MHz.
ScicRegs.SCILBAUD =0x0044;
#endif
ScicRegs.SCICTL1.all =0x0023;// Relinquish SCI from Reset
}
void scib_echoback_init()
{
//scib
ScibRegs.SCICCR.all =0x0007; // 1 stop bit,No loopback
// No parity,8 char bits,
// async mode, idle-line protocol
ScibRegs.SCICTL1.all =0x0003;// enable TX, RX, internal SCICLK,
// Disable RX ERR, SLEEP, TXWAKE
ScibRegs.SCICTL2.all =0x0003;
ScibRegs.SCICTL2.bit.TXINTENA = 0;
ScibRegs.SCICTL2.bit.RXBKINTENA =1;
#if (CPU_FRQ_150MHZ)
ScibRegs.SCIHBAUD =0x0001;// 9600 baud @LSPCLK = 37.5MHz.
ScibRegs.SCILBAUD =0x00E7;
#endif
#if (CPU_FRQ_100MHZ)
ScibRegs.SCIHBAUD =0x0001;// 9600 baud @LSPCLK = 20MHz.
ScibRegs.SCILBAUD =0x0044;
#endif
ScibRegs.SCICTL1.all =0x0023; // Relinquish SCI from Reset
}
// Transmit a character from the SCI
void scic_xmit(int a)
{
while (ScicRegs.SCIFFTX.bit.TXFFST != 0) {}
ScicRegs.SCITXBUF=a;
}
void scic_msg(char * msg)
{
int i;
i = 0;
while(msg != '\0')
{
scic_xmit(msg);
i++;
}
}
void scib_xmit(int a)
{
while (ScibRegs.SCIFFTX.bit.TXFFST != 0) {}
ScibRegs.SCITXBUF=a;
}
void scib_msg(char * msg)
{
int i;
i = 0;
while(msg != '\0')
{
scib_xmit(msg);
i++;
}
}
// Initalize the SCI FIFO
void scic_fifo_init()
{
ScicRegs.SCIFFTX.all=0xE040;
ScicRegs.SCIFFRX.all=0x6061;
ScicRegs.SCIFFCT.all=0x0;
}
void scib_fifo_init()
{
ScibRegs.SCIFFTX.all=0xE040;
ScibRegs.SCIFFRX.all=0x6061;
ScibRegs.SCIFFCT.all=0x0;
}
//SCIB中断接收程序
interrupt void scib_INT(void)
{
Uint16 ReceivedChar1;
char *msg1;
// Get character
ReceivedChar1 = ScibRegs.SCIRXBUF.all;
// Echo character back
msg1 = "You sent: \0";
scib_msg(msg1);
scib_xmit(ReceivedChar1);
msg1 = "\r\n\0";
scib_msg(msg1);
ScibRegs.SCIFFRX.bit.RXFFOVRCLR=1;
ScibRegs.SCIFFRX.bit.RXFFINTCLR=1;
PieCtrlRegs.PIEACK.all = PIEACK_GROUP9;
EINT;
}
//SCIC中断接收程序
interrupt void scic_INT(void)
{
Uint16 ReceivedChar1;
char *msg1;
ReceivedChar1 = ScicRegs.SCIRXBUF.all;
// Echo character back
msg1 = "You sent: \0";
scic_msg(msg1);
scic_xmit(ReceivedChar1);
msg1 = "\r\n\0";
scic_msg(msg1);
ScicRegs.SCIFFRX.bit.RXFFOVRCLR=1;
ScicRegs.SCIFFRX.bit.RXFFINTCLR=1;
PieCtrlRegs.PIEACK.all = PIEACK_GROUP8;
EINT;
}
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