DSP28335串口通信实验

1、/ main函数#include DSP2833x_Device.h / DSP2833x Headerfile Include File#include DSP2833x_Examples.h / DSP2833x Examples Include File#include sci.h#define NUM 10/ Prototype statements for functions found within this file.void SCI_Operation();void SCIA_Operation(void);void SCIB_Operation(void);void SCIC

2、_Operation(void);void sci_config_init(void);void scia_config_init(void);void scib_config_init(void);void scic_config_init(void);void SCI_FIFO_Init(void);void SCIA_FIFO_Init(void);void SCIB_FIFO_Init(void);void SCIC_FIFO_Init(void);void SCIA_Character_Send_Msg(char character);void SCIB_Character_Send

3、_Msg(char character);void SCIC_Character_Send_Msg(char character);void SCI_Send_Msg(char *message);void SCI_Send_Msg_Count(char count,char *message);char SCI_Receive_Buff();char SCIA_Receive_Buff(void);char SCIB_Receive_Buff(void);char SCIC_Receive_Buff(void);char *msg=rnHello Yan Xu!0;char *message

4、1= rnlearner the scic!0;char ReceivedChar;char LoopCount =0;void main(void) InitSysCtrl(); Init_SCI_Gpio(); InitXintf16Gpio(); DINT; InitPieCtrl(); IER = 0x0000; IFR = 0x0000; InitPieVectTable(); SCI_FIFO_Init(); / Initialize the SCI FIFO sci_config_init(); / Initalize SCI for echoback SCI_Send_Msg(

5、msg); SCI_Send_Msg_Count(NUM,message1); msg = rnYou will enter a character, and the DSP will echo it back! n0; SCI_Send_Msg(msg); while(LoopCount+10) SCI_Operation(); void SCI_Operation()#if (DSP2833x_SCI_A) SCIA_Operation();#endif#if (DSP2833x_SCI_B) SCIB_Operation();#endif#if (DSP2833x_SCI_C) SCIC

6、_Operation();#endifvoid SCIA_Operation(void) msg = rnEnter a character: 0; SCI_Send_Msg(msg); ReceivedChar = SCIA_Receive_Buff(); / Echo character back msg = You sent: 0; SCI_Send_Msg(msg); SCIA_Character_Send_Msg(ReceivedChar);void SCIB_Operation(void) msg = rnEnter a character: 0; SCI_Send_Msg(msg

7、); ReceivedChar = SCIB_Receive_Buff(); / Echo character back msg = You sent: 0; SCI_Send_Msg(msg); SCIB_Character_Send_Msg(ReceivedChar);void SCIC_Operation(void) msg = rnEnter a character: 0; SCI_Send_Msg(msg); ReceivedChar = SCIC_Receive_Buff(); / Echo character back msg = You sent: 0; SCI_Send_Ms

8、g(msg); SCIC_Character_Send_Msg(ReceivedChar);void sci_config_init(void)#if (DSP2833x_SCI_A)/ Test 1,SCIA DLB, 8-bit word, baud rate 0x000F, default, 1 STOP bit, no parityscia_config_init();#endif#if (DSP2833x_SCI_B)/ Test 1,SCIA DLB, 8-bit word, baud rate 0x000F, default, 1 STOP bit, no parityscib_

9、config_init();#endif#if (DSP2833x_SCI_C)/ Test 1,SCIA DLB, 8-bit word, baud rate 0x000F, default, 1 STOP bit, no parity scic_config_init();#endif/ Test 1,SCIA DLB, 8-bit word, baud rate 0x000F, default, 1 STOP bit, no parityvoid scia_config_init() / Note: Clocks were turned on to the SCIA peripheral

10、 / in the InitSysCtrl() function SciaRegs.SCICCR.all =0x0007; / 1 stop bit, No loopback / No parity,8 char bits, / async mode, idle-line protocolSciaRegs.SCICTL1.all =0x0003; / enable TX, RX, internal SCICLK, / Disable RX ERR, SLEEP, TXWAKESciaRegs.SCICTL2.all =0x0003;SciaRegs.SCICTL2.bit.TXINTENA =

11、 1;SciaRegs.SCICTL2.bit.RXBKINTENA =1;#if (CPU_FRQ_150MHZ) SciaRegs.SCIHBAUD =0x0001; / 9600 baud LSPCLK = 37.5MHz. SciaRegs.SCILBAUD =0x00E7;#endif#if (CPU_FRQ_100MHZ) SciaRegs.SCIHBAUD =0x0001; / 9600 baud LSPCLK = 20MHz. SciaRegs.SCILBAUD =0x0044;#endifSciaRegs.SCICTL1.all =0x0023; / Relinquish S

12、CI from Reset/ Test 1,SCIA DLB, 8-bit word, baud rate 0x000F, default, 1 STOP bit, no parityvoid scib_config_init() / Note: Clocks were turned on to the SCIA peripheral / in the InitSysCtrl() functionScibRegs.SCICCR.all =0x0007; / 1 stop bit, No loopback / No parity,8 char bits, / async mode, idle-l

13、ine protocolScibRegs.SCICTL1.all =0x0003; / enable TX, RX, internal SCICLK, / Disable RX ERR, SLEEP, TXWAKEScibRegs.SCICTL2.all =0x0003;ScibRegs.SCICTL2.bit.TXINTENA = 1;ScibRegs.SCICTL2.bit.RXBKINTENA =1;#if (CPU_FRQ_150MHZ) ScibRegs.SCIHBAUD =0x0001; / 9600 baud LSPCLK = 37.5MHz. ScibRegs.SCILBAUD

14、 =0x00E7;#endif#if (CPU_FRQ_100MHZ) ScibRegs.SCIHBAUD =0x0001; / 9600 baud LSPCLK = 20MHz. ScibRegs.SCILBAUD =0x0044;#endifScibRegs.SCICTL1.all =0x0023; / Relinquish SCI from Reset/ Test 1,SCIA DLB, 8-bit word, baud rate 0x000F, default, 1 STOP bit, no parityvoid scic_config_init() / Note: Clocks we

15、re turned on to the SCIA peripheral / in the InitSysCtrl() function ScicRegs.SCICCR.all =0x0007; / 1 stop bit, No loopback / No parity,8 char bits, / async mode, idle-line protocolScicRegs.SCICTL1.all =0x0003; / enable TX, RX, internal SCICLK, / Disable RX ERR, SLEEP, TXWAKEScicRegs.SCICTL2.all =0x0

16、003;ScicRegs.SCICTL2.bit.TXINTENA = 1;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;#endifScicRegs.

17、SCICTL1.all =0x0023; / Relinquish SCI from Reset/ Transmit a character from the SCIvoid SCIA_Character_Send_Msg(char character)while(SciaRegs.SCICTL2.bit.TXRDY=0)SciaRegs.SCITXBUF=character;void SCIB_Character_Send_Msg(char character)while(ScibRegs.SCICTL2.bit.TXRDY=0)ScibRegs.SCITXBUF=character;voi

18、d SCIC_Character_Send_Msg(char character)while(ScicRegs.SCICTL2.bit.TXRDY=0)ScicRegs.SCITXBUF=character;void SCI_FIFO_Init()#if (DSP2833x_SCI_A)SCIA_FIFO_Init();#endif#if (DSP2833x_SCI_B)SCIB_FIFO_Init();#endif#if (DSP2833x_SCI_C)SCIC_FIFO_Init();#endif/ Initalize the SCI FIFOvoid SCIA_FIFO_Init() S

19、ciaRegs.SCIFFTX.all=0x8000;/ Initalize the SCI FIFOvoid SCIB_FIFO_Init() ScibRegs.SCIFFTX.all=0x8000;/ Initalize the SCI FIFOvoid SCIC_FIFO_Init() ScicRegs.SCIFFTX.all=0x8000;/ ScicRegs.SCIFFRX.all=0x204f;/ ScicRegs.SCIFFCT.all=0x0;char SCI_Receive_Buff()#if (DSP2833x_SCI_A)return( SCIA_Receive_Buff

20、();#endif#if (DSP2833x_SCI_B)return (SCIB_Receive_Buff();#endif#if (DSP2833x_SCI_C)return (SCIC_Receive_Buff();#endifchar SCIA_Receive_Buff() / Wait for inc character while(SciaRegs.SCIRXST.bit.RXRDY !=1) / wait for XRDY =1 for empty state / Get character return SciaRegs.SCIRXBUF.all;char SCIB_Recei

21、ve_Buff() / Wait for inc character while(ScibRegs.SCIRXST.bit.RXRDY !=1) / wait for XRDY =1 for empty state / Get character return ScibRegs.SCIRXBUF.all;char SCIC_Receive_Buff() / Wait for inc character while(ScicRegs.SCIRXST.bit.RXRDY !=1) / wait for XRDY =1 for empty state / Get character return S

22、cicRegs.SCIRXBUF.all;void SCI_Send_Msg(char *message)int i=0;while(messagei+!=0)#if(DSP2833x_SCI_A)SCIA_Character_Send_Msg(messagei);#endif#if(DSP2833x_SCI_B)SCIB_Character_Send_Msg(messagei);#endif#if(DSP2833x_SCI_C)SCIC_Character_Send_Msg(messagei);#endifvoid SCI_Send_Msg_Count(char count,char *me

23、ssage)while(count-)SCI_Send_Msg(message);/=/ No more./=/=/ sci.c文件/=#include DSP2833x_Device.h / DSP2833x Headerfile Include File#include DSP2833x_Examples.h / DSP2833x Examples Include File#include sci.hvoid Init_SCI_Gpio()#if DSP2833x_SCI_A InitSCIAGpio();#endif#if DSP2833x_SCI_B InitSCIBGpio();#e

24、ndif#if DSP2833x_SCI_CInitSCICGpio();#endifvoid InitSCIAGpio(void) EALLOW; /ENBALE PULL-UP FUNCTION GpioCtrlRegs.GPBPUD.bit.GPIO36 = 0; / Enable pull-up for GPIO28 (SCIRXDA) GpioCtrlRegs.GPBPUD.bit.GPIO35 = 0; / Enable pull-up for GPIO29 (SCITXDA) GpioCtrlRegs.GPBQSEL1.bit.GPIO35 = 3; / Asynch input

25、 GPIO28 (SCIRXDA) GpioCtrlRegs.GPBQSEL1.bit.GPIO36 = 3; GpioCtrlRegs.GPBMUX1.bit.GPIO36 = 1; / Configure GPIO28 for SCIRXDA operation GpioCtrlRegs.GPBMUX1.bit.GPIO35 = 1; / Configure GPIO29 for SCITXDA operation#if 0GpioCtrlRegs.GPAPUD.bit.GPIO28 = 0; / Enable pull-up for GPIO28 (SCIRXDA)GpioCtrlReg

26、s.GPAPUD.bit.GPIO29 = 0; / Enable pull-up for GPIO29 (SCITXDA)GpioCtrlRegs.GPAQSEL2.bit.GPIO28 = 3; / Asynch input GPIO28 (SCIRXDA)GpioCtrlRegs.GPAMUX2.bit.GPIO28 = 1; / Configure GPIO28 for SCIRXDA operationGpioCtrlRegs.GPAMUX2.bit.GPIO29 = 1; / Configure GPIO29 for SCITXDA operation#endifEDIS;void

27、 InitSCIBGpio() EALLOW;/* Enable internal pull-up for the selected pins */ Pull-ups can be enabled or disabled disabled by the user./ This will enable the pullups for the specified pins./ Comment out other unwanted lines./ GpioCtrlRegs.GPAPUD.bit.GPIO9 = 0; / Enable pull-up for GPIO9 (SCITXDB) GpioC

28、trlRegs.GPAPUD.bit.GPIO14 = 0; / Enable pull-up for GPIO14 (SCITXDB) /GpioCtrlRegs.GPAPUD.bit.GPIO18 = 0; / Enable pull-up for GPIO18 (SCITXDB)/ GpioCtrlRegs.GPAPUD.bit.GPIO22 = 0; / Enable pull-up for GPIO22 (SCITXDB)/ GpioCtrlRegs.GPAPUD.bit.GPIO11 = 0; / Enable pull-up for GPIO11 (SCIRXDB) GpioCt

29、rlRegs.GPAPUD.bit.GPIO15 = 0; / Enable pull-up for GPIO15 (SCIRXDB) / GpioCtrlRegs.GPAPUD.bit.GPIO19 = 0; / Enable pull-up for GPIO19 (SCIRXDB)/ GpioCtrlRegs.GPAPUD.bit.GPIO23 = 0; / Enable pull-up for GPIO23 (SCIRXDB)/* Set qualification for selected pins to asynch only */ This will select asynch (

30、no qualification) for the selected pins./ Comment out other unwanted lines./ GpioCtrlRegs.GPAQSEL1.bit.GPIO11 = 3; / Asynch input GPIO11 (SCIRXDB) GpioCtrlRegs.GPAQSEL1.bit.GPIO15 = 3; / Asynch input GPIO15 (SCIRXDB) /GpioCtrlRegs.GPAQSEL2.bit.GPIO19 = 3; / Asynch input GPIO19 (SCIRXDB)/ GpioCtrlReg

31、s.GPAQSEL2.bit.GPIO23 = 3; / Asynch input GPIO23 (SCIRXDB)/* Configure SCI-B pins using GPIO regs*/ This specifies which of the possible GPIO pins will be SCI functional pins./ Comment out other unwanted lines./ GpioCtrlRegs.GPAMUX1.bit.GPIO9 = 2; / Configure GPIO9 for SCITXDB operation GpioCtrlRegs

32、.GPAMUX1.bit.GPIO14 = 2; / Configure GPIO14 for SCITXDB operation /GpioCtrlRegs.GPAMUX2.bit.GPIO18 = 2; / Configure GPIO18 for SCITXDB operation/ GpioCtrlRegs.GPAMUX2.bit.GPIO22 = 3; / Configure GPIO22 for SCITXDB operation/ GpioCtrlRegs.GPAMUX1.bit.GPIO11 = 2; / Configure GPIO11 for SCIRXDB operation GpioCtrlRegs.GPAMUX1.bit.GPIO15 = 2; / Configure GPIO15 for SCIRXDB operation / GpioCtrlRegs.GPAMUX2.bit.GPIO19 = 2; / Configure GPIO19 for SCIRXDB operation/ GpioCtrlRegs.GPAMUX2.bit.GPIO23 = 3; / Configure GPIO23 f