DSP

简简单单----一个TMS320F28035的串口驱动程序

2019-07-13 17:28发布

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/************************************ 标题：MySci.h 软件平台：CCS v5.2 硬件平台：TMS320F28035coreboard 主频：60M 欢迎光临 http://greatech.taobao.com author：小船 data：2013-01-22 *************************************/ #ifndef MySci_H_ #define MySci_H_ #include "PeripheralHeaderIncludes.h" #include #define RECEIVER_BUFF_SIZE 50 struct Sci_send_data{ char *AddPtr; char length; }; extern char receiver_counter; extern struct Sci_send_data data; extern char receiver_data_buff[RECEIVER_BUFF_SIZE]; void MySci_init(); bool MySci_send(char *Ptr,char length); #endif /* MySci_H_ */

/************************************ 标题：MySci.c 软件平台：CCS v5.2 硬件平台：TMS320F28035coreboard 主频：60M 描述：串口通信，波特率38400，自动中断发送，不必多余的等待 注意：如果用fifo，就不用判断SciaRegs.SCIRXST.bit.RXRDY，此位不会生效 基于2803x C/C++ Header Files V1.21 欢迎 http://greatech.taobao.com author：小船 data：2013-01-22 *************************************/ #include"MySci.h" struct Sci_send_data data; char receiver_data_buff[RECEIVER_BUFF_SIZE]; char receiver_counter = 0; interrupt void rece_isr(); interrupt void tx_isr(); void MySci_init() { /*配置GPIO*/ EALLOW; GpioCtrlRegs.GPAPUD.bit.GPIO28 = 0; // Enable pull-up for GPIO28 (SCIRXDA) GpioCtrlRegs.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 operation GpioCtrlRegs.GPAMUX2.bit.GPIO29 = 1; // Configure GPIO29 for SCITXDA operation EDIS; /*配置fifo*/ SciaRegs.SCIFFTX.all=0xC060; SciaRegs.SCIFFRX.all=0x0021; //fifo接收到一个字节就中断 SciaRegs.SCIFFCT.all=0x0; /*配置sci*/ SciaRegs.SCICCR.all = 0x0007; // 1 stop bit, No loopback // No parity,8 char bits, // async mode, idle-line protocol SciaRegs.SCICTL1.all = 0x0063; // enable TX, RX, RX ERR internal SCICLK, // Disable SLEEP, TXWAKE //SciaRegs.SCICTL2.bit.TXINTENA = 1; SciaRegs.SCICTL2.bit.RXBKINTENA = 1; SciaRegs.SCIHBAUD = 0x0000; // 38400 baud @LSPCLK = 15MHz (60 MHz SYSCLK). SciaRegs.SCILBAUD = 0x0030; SciaRegs.SCICTL1.all = 0x0063; // Relinquish SCI from Reset SciaRegs.SCIFFTX.bit.TXFIFOXRESET=1; SciaRegs.SCIFFRX.bit.RXFIFORESET=1; /*配置中断*/ EALLOW; PieVectTable.SCITXINTA = &tx_isr; //注册中断向量表 PieVectTable.SCIRXINTA = &rece_isr; PieCtrlRegs.PIECTRL.bit.ENPIE = 1; //使能PIE PieCtrlRegs.PIEIER9.bit.INTx1=1; //使能int9.1 PieCtrlRegs.PIEIER9.bit.INTx2=1; //使能int9.2 IER |= (1<<8);//使能int9 EINT; EDIS; data.length=0; data.AddPtr=0; } bool MySci_send(char *Ptr,char length) { if(SciaRegs.SCIFFTX.bit.TXFFIENA==1) return false; else { data.AddPtr = Ptr; data.length = length; SciaRegs.SCIFFTX.bit.TXFFIENA=1; } return true; } interrupt void tx_isr() { if( data.length) { SciaRegs.SCITXBUF = *data.AddPtr++; data.length--; } else SciaRegs.SCIFFTX.bit.TXFFIENA=0; SciaRegs.SCIFFTX.bit.TXFFINTCLR=1; PieCtrlRegs.PIEACK.all |= PIEACK_GROUP9; } interrupt void rece_isr() { if(SciaRegs.SCIRXST.bit.RXERROR) { while(1); } if( receiver_counter != RECEIVER_BUFF_SIZE) receiver_data_buff[receiver_counter++] = SciaRegs.SCIRXBUF.bit.RXDT; SciaRegs.SCIFFRX.bit.RXFFOVRCLR=1; // Clear Overflow flag SciaRegs.SCIFFRX.bit.RXFFINTCLR=1; // Clear Interrupt flag PieCtrlRegs.PIEACK.all |= PIEACK_GROUP9; }


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