Text Compare
Produced: 5/10/2019 6:09:18 PM
   
Mode:  All  
Left file: E2E.txt  
Right file: C:\ti\c2000\C2000Ware_1_00_06_00\device_support\f2837xd\examples\cpu1\sci_echoback\cpu01\Example_2837xDSci_Echoback.c  
  <> //###########################################################################
    //
    // FILE:    Example_2837xDSci_Echoback.c
    //
    // TITLE:   SCI Echoback.
    //
    //! \addtogroup cpu01_example_list
    //! <h1>SCI Echoback (sci_echoback)</h1>
    //!
    //!  This test receives and echo-backs data through the SCI-A port.
    //!
    //!  The PC application 'hyperterminal' or another terminal
    //!  such as 'putty' can be used to view the data from the SCI and
    //!  to send information to the SCI.  Characters received
    //!  by the SCI port are sent back to the host.
    //!
    //!  \b Running \b the \b Application
    //!  -# Configure hyperterminal or another terminal such as putty:
    //!
    //!  For hyperterminal you can use the included hyperterminal configuration
    //!  file SCI_96.ht.
    //!  To load this configuration in hyperterminal
    //!    -# Open hyperterminal
    //!    -# Go to file->open
    //!    -# Browse to the location of the project and
    //!       select the SCI_96.ht file.
    //!  -# Check the COM port.
    //!  The configuration file is currently setup for COM1.
    //!  If this is not correct, disconnect (Call->Disconnect)
    //!  Open the File-Properties dialogue and select the correct COM port.
    //!  -# Connect hyperterminal Call->Call
    //!  and then start the 2837xD SCI echoback program execution.
    //!  -# The program will print out a greeting and then ask you to
    //!  enter a character which it will echo back to hyperterminal.
    //!
    //!  \note If you are unable to open the .ht file, or you are using
    //!  a different terminal, you can open a COM port with the following settings
    //!  -  Find correct COM port
    //!  -  Bits per second = 9600
    //!  -  Date Bits = 8
    //!  -  Parity = None
    //!  -  Stop Bits = 1
    //!  -  Hardware Control = None
    //!
    //!  \b Watch \b Variables \n
    //!  - LoopCount - the number of characters sent
    //!
    //! \b External \b Connections \n
    //!  Connect the SCI-A port to a PC via a transceiver and cable.
    //!  - GPIO28 is SCI_A-RXD (Connect to Pin3, PC-TX, of serial DB9 cable)
    //!  - GPIO29 is SCI_A-TXD (Connect to Pin2, PC-RX, of serial DB9 cable)
    //!
    //
    //###########################################################################
    // $TI Release: F2837xD Support Library v3.05.00.00 $
    // $Release Date: Thu Oct 18 15:48:42 CDT 2018 $
    // $Copyright:
    // Copyright (C) 2013-2018 Texas Instruments Incorporated - http://www.ti.com/
    //
    // Redistribution and use in source and binary forms, with or without 
    // modification, are permitted provided that the following conditions 
    // are met:
    // 
    //   Redistributions of source code must retain the above copyright 
    //   notice, this list of conditions and the following disclaimer.
    // 
    //   Redistributions in binary form must reproduce the above copyright
    //   notice, this list of conditions and the following disclaimer in the 
    //   documentation and/or other materials provided with the   
    //   distribution.
    // 
    //   Neither the name of Texas Instruments Incorporated nor the names of
    //   its contributors may be used to endorse or promote products derived
    //   from this software without specific prior written permission.
    // 
    // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
    // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
    // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
    // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
    // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
    // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
    // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
    // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    // $
    //###########################################################################
     
    //
    // Included Files
    //
#include "F28x_Project.h"    #include "F28x_Project.h"
#define TX 18     
    //
    // Globals
    //
    Uint16 LoopCount;
     
    //
    // Function Prototypes
    //
void scib_echoback_init(void);    void scia_echoback_init(void);
void scib_fifo_init(void);    void scia_fifo_init(void);
void scib_xmit(int a);    void scia_xmit(int a);
void scib_msg(char *msg);    void scia_msg(char *msg);
     
    //
    // Main
    //
void main(void)    void main(void)
{    {
        Uint16 ReceivedChar;
    char *msg;        char *msg;
     
    //
    // Step 1. Initialize System Control:
    // PLL, WatchDog, enable Peripheral Clocks
    // This example function is found in the F2837xD_SysCtrl.c file.
    //
    InitSysCtrl();       InitSysCtrl();
    // GPIO     
    //
    // Step 2. Initialize GPIO:
    // This example function is found in the F2837xD_Gpio.c file and
    // illustrates how to set the GPIO to it's default state.
    //
    InitGpio();       InitGpio();
    EALLOW;     
    // Set the mux to SCITXDB on GPIO 18     
    GpioCtrlRegs.GPAGMUX2.bit.GPIO18 = 0;    //
    GpioCtrlRegs.GPAMUX2.bit.GPIO18 = 2;   // For this example, only init the pins for the SCI-A port.
    // Select CPU 1   //  GPIO_SetupPinMux() - Sets the GPxMUX1/2 and GPyMUX1/2 register bits
    GpioCtrlRegs.GPACSEL3.bit.GPIO18 = 0;   //  GPIO_SetupPinOptions() - Sets the direction and configuration of the GPIOS
    // Set GPIO 18 as output   // These functions are found in the F2837xD_Gpio.c file.
    GpioCtrlRegs.GPADIR.bit.GPIO18 = 1;    //
    // Async mode     GPIO_SetupPinMux(28, GPIO_MUX_CPU1, 1);
    GpioCtrlRegs.GPAQSEL2.bit.GPIO18 = 3;       GPIO_SetupPinOptions(28, GPIO_INPUT, GPIO_PUSHPULL);
    EDIS;       GPIO_SetupPinMux(29, GPIO_MUX_CPU1, 1);
       GPIO_SetupPinOptions(29, GPIO_OUTPUT, GPIO_ASYNC);
    // Interrupts     
    //
    // Step 3. Clear all __interrupts and initialize PIE vector table:
    // Disable CPU __interrupts
    //
    DINT;       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 F2837xD_PieCtrl.c file.
    //
    InitPieCtrl();       InitPieCtrl();
     
    //
    // Disable CPU __interrupts and clear all CPU __interrupt flags:
    //
    IER = 0x0000;       IER = 0x0000;
    IFR = 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 F2837xD_DefaultIsr.c.
    // This function is found in F2837xD_PieVect.c.
    //
    InitPieVectTable();       InitPieVectTable();
    EINT;     
    //
    // Step 4. User specific code:
    //
       LoopCount = 0;
    // SCI     
    scib_fifo_init();      scia_fifo_init();       // Initialize the SCI FIFO
    scib_echoback_init();      scia_echoback_init();   // Initialize SCI for echoback
     
       msg = "\r\n\n\nHello World!\0";
       scia_msg(msg);
     
       msg = "\r\nYou will enter a character, and the DSP will echo it back! \n\0";
       scia_msg(msg);
     
    for (;;) {       for(;;)
        msg = "Salut\n\0";   {
           msg = "\r\nEnter a character: \0";
        scib_msg(msg);           scia_msg(msg);
     
           //
           // Wait for inc character
           //
           while(SciaRegs.SCIFFRX.bit.RXFFST == 0) { } // wait for empty state
     
           //
           // Get character
           //
           ReceivedChar = SciaRegs.SCIRXBUF.all;
     
           //
           // Echo character back
           //
           msg = "  You sent: \0";
           scia_msg(msg);
           scia_xmit(ReceivedChar);
     
           LoopCount++;
    }       }
}    }
     
    //
    //  scia_echoback_init - Test 1,SCIA  DLB, 8-bit word, baud rate 0x000F,
    //                       default, 1 STOP bit, no parity
    //
void scib_echoback_init()    void scia_echoback_init()
{    {
        //
        // Note: Clocks were turned on to the SCIA peripheral
        // in the InitSysCtrl() function
        //
     
    ScibRegs.SCICCR.all = 0x0007;   // 1 stop bit,  No loopback        SciaRegs.SCICCR.all = 0x0007;   // 1 stop bit,  No loopback
                                    // No parity,8 char bits,                                        // No parity,8 char bits,
                                    // async mode, idle-line protocol                                        // async mode, idle-line protocol
    ScibRegs.SCICTL1.all = 0x0003;  // enable TX, RX, internal SCICLK,        SciaRegs.SCICTL1.all = 0x0003;  // enable TX, RX, internal SCICLK,
                                    // Disable RX ERR, SLEEP, TXWAKE                                        // Disable RX ERR, SLEEP, TXWAKE
    ScibRegs.SCICTL2.all = 0x0003;  // Enable RXBKINTENA and TXINTENA        SciaRegs.SCICTL2.all = 0x0003;
    //       SciaRegs.SCICTL2.bit.TXINTENA = 1;
    // SCIB at 9600 baud       SciaRegs.SCICTL2.bit.RXBKINTENA = 1;
    // @LSPCLK = 50 MHz (200 MHz SYSCLK) HBAUD = 0x02 and LBAUD = 0x8B.     
    // @LSPCLK = 30 MHz (120 MHz SYSCLK) HBAUD = 0x01 and LBAUD = 0x86.    //
    //       // SCIA at 9600 baud
        // @LSPCLK = 50 MHz (200 MHz SYSCLK) HBAUD = 0x02 and LBAUD = 0x8B.
        // @LSPCLK = 30 MHz (120 MHz SYSCLK) HBAUD = 0x01 and LBAUD = 0x86.
        //
    ScibRegs.SCIHBAUD.all = 0x0002;        SciaRegs.SCIHBAUD.all = 0x0002;
    ScibRegs.SCILBAUD.all = 0x008B;        SciaRegs.SCILBAUD.all = 0x008B;
     
    ScibRegs.SCICTL1.all = 0x0023;  // Relinquish SCI from Reset        SciaRegs.SCICTL1.all = 0x0023;  // Relinquish SCI from Reset
}    }
     
    //
    // scia_xmit - Transmit a character from the SCI
    //
void scib_xmit(int a)    void scia_xmit(int a)
{    {
    while (ScibRegs.SCIFFTX.bit.TXFFST != 0) {}        while (SciaRegs.SCIFFTX.bit.TXFFST != 0) {}
    ScibRegs.SCITXBUF.all =a;        SciaRegs.SCITXBUF.all =a;
}    }
     
    //
    // scia_msg - Transmit message via SCIA
    //
void scib_msg(char * msg)    void scia_msg(char * msg)
{    {
    int i;        int i;
    i = 0;        i = 0;
    while(msg[i] != '\0')        while(msg[i] != '\0')
    {        {
        scib_xmit(msg[i]);            scia_xmit(msg[i]);
        i++;            i++;
    }        }
}    }
     
    //
    // scia_fifo_init - Initialize the SCI FIFO
    //
void scib_fifo_init()    void scia_fifo_init()
{    {
    ScibRegs.SCIFFTX.all = 0xE040;        SciaRegs.SCIFFTX.all = 0xE040;
    ScibRegs.SCIFFRX.all = 0x2044;        SciaRegs.SCIFFRX.all = 0x2044;
    ScibRegs.SCIFFCT.all = 0x0;        SciaRegs.SCIFFCT.all = 0x0;
} = }
     
  -+ //
    // End of file
    //