path: root/Software/Code_Composer/twine_usblib_demo/drivers/SPI/spi_master.c

//*****************************************************************************
//
// spi_master.c - Example demonstrating how to configure SSI0 in SPI master
//                mode.
//
// Copyright (c) 2010-2017 Texas Instruments Incorporated.  All rights reserved.
// Software License Agreement
//
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//
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//
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// This is part of revision 2.1.4.178 of the Tiva Firmware Development Package.
//
//*****************************************************************************

#include <stdbool.h>
#include <stdint.h>
#include "inc/hw_memmap.h"
#include "driverlib/gpio.h"
#include "driverlib/pin_map.h"
#include "driverlib/ssi.h"
#include "driverlib/sysctl.h"
//#include "driverlib/uart.h"
#include "utils/uartstdio.h"

#include "graphics_adapter.h"

//*****************************************************************************
//
//! \addtogroup ssi_examples_list
//! <h1>SPI Master (spi_master)</h1>
//!
//! This example shows how to configure the SSI0 as SPI Master.  The code will
//! send three characters on the master Tx then polls the receive FIFO until
//! 3 characters are received on the master Rx.
//!
//! This example uses the following peripherals and I/O signals.  You must
//! review these and change as needed for your own board:
//! - SSI0 peripheral
//! - GPIO Port A peripheral (for SSI0 pins)
//! - SSI0Clk - PA2
//! - SSI0Fss - PA3
//! - SSI0Rx  - PA4
//! - SSI0Tx  - PA5
//!
//! The following UART signals are configured only for displaying console
//! messages for this example.  These are not required for operation of SSI0.
//! - UART0 peripheral
//! - GPIO Port A peripheral (for UART0 pins)
//! - UART0RX - PA0
//! - UART0TX - PA1
//!
//! This example uses the following interrupt handlers.  To use this example
//! in your own application you must add these interrupt handlers to your
//! vector table.
//! - None.
//
//*****************************************************************************

//*****************************************************************************
//
// Number of bytes to send and receive.
//
//*****************************************************************************
#define NUM_SSI_DATA            5

//*****************************************************************************
//
// This function sets up UART0 to be used for a console to display information
// as the example is running.
//
//*****************************************************************************
/*
void InitSPI2(void)
{
    //
    // The SSI2 peripheral must be enabled for use.
    //
    SysCtlPeripheralReset(SYSCTL_PERIPH_SSI2);
    SysCtlPeripheralEnable(SYSCTL_PERIPH_SSI2);

    //
    // For this example SSI2 is used with PortG[7:4].  GPIO port G needs to be
    // enabled so these pins can be used.
    //
    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOG);

    //
    // Configure the pin muxing for SSI2 functions on port G4, G5, G6 and G7.
    // This step is not necessary if your part does not support pin muxing.


    #define GPIO_PG4_SSI2TX GPIO_PG4_SSI2XDAT1
    #define GPIO_PG5_SSI2RX GPIO_PG5_SSI2XDAT0
    //
    GPIOPinConfigure(GPIO_PG7_SSI2CLK);
    GPIOPinConfigure(GPIO_PG6_SSI2FSS);
    GPIOPinConfigure(GPIO_PG5_SSI2RX);
    GPIOPinConfigure(GPIO_PG4_SSI2TX);

    //
    // Configure the GPIO settings for the SSI pins.  This function also gives
    // control of these pins to the SSI hardware.  Consult the data sheet to
    // see which functions are allocated per pin.
    // The pins are assigned as follows:
    //      PG4 - SSI2Tx
    //      PG5 - SSI2Rx
    //      PG6 - SSI2Fss
    //      PG7 - SSI2CLK
    //
    GPIOPinTypeSSI(GPIO_PORTG_BASE, GPIO_PIN_7 | GPIO_PIN_6 | GPIO_PIN_5 |
            GPIO_PIN_4);

    //
    // Configure and enable the SSI2 port for SPI Master mode.
    //
#if defined(TARGET_IS_TM4C129_RA0) ||                                         \
    defined(TARGET_IS_TM4C129_RA1) ||                                         \
    defined(TARGET_IS_TM4C129_RA2)
    SSIConfigSetExpClk(SSI2_BASE, ui32SysClock, SSI_FRF_MOTO_MODE_0,
                       SSI_MODE_MASTER, 1000000, 8);
#else
    SSIConfigSetExpClk(SSI2_BASE, SysCtlClockGet(), SSI_FRF_MOTO_MODE_0,
                       SSI_MODE_MASTER, 1000000, 8);
#endif
    ///--------------------------------

    ///----------------------------

    //
    // Enable the SSI2 module.
    //
    SSIEnable(SSI2_BASE);
}
*/

/*
void
InitConsole2(void)
{
    //
    // Enable GPIO port A which is used for UART0 pins.
    // TODO: change this to whichever GPIO port you are using.
    //
    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);

    //
    // Configure the pin muxing for UART0 functions on port A0 and A1.
    // This step is not necessary if your part does not support pin muxing.
    // TODO: change this to select the port/pin you are using.
    //
    GPIOPinConfigure(GPIO_PA0_U0RX);
    GPIOPinConfigure(GPIO_PA1_U0TX);

    //
    // Enable UART0 so that we can configure the clock.
    //
    SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);

    //
    // Use the internal 16MHz oscillator as the UART clock source.
    //
    UARTClockSourceSet(UART0_BASE, UART_CLOCK_PIOSC);

    //
    // Select the alternate (UART) function for these pins.
    // TODO: change this to select the port/pin you are using.
    //
    GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);

    //
    // Initialize the UART for console I/O.
    //
    UARTStdioConfig(0, 115200, 16000000);
}
*/
//*****************************************************************************
//
// Configure SSI2 in master Freescale (SPI) mode.  This example will send out
// 3 bytes of data, then wait for 3 bytes of data to come in.  This will all be
// done using the polling method.
//
//*****************************************************************************
int SPI_main(void)
{
#if defined(TARGET_IS_TM4C129_RA0) ||                                         \
    defined(TARGET_IS_TM4C129_RA1) ||                                         \
    defined(TARGET_IS_TM4C129_RA2)
    uint32_t ui32SysClock;
#endif

    uint32_t pui32DataTx[NUM_SSI_DATA];
    uint32_t pui32DataRx[NUM_SSI_DATA];
    uint32_t ui32Index;

    //
    // Set the clocking to run directly from the external crystal/oscillator.
    // TODO: The SYSCTL_XTAL_ value must be changed to match the value of the
    // crystal on your board.
    //
#if defined(TARGET_IS_TM4C129_RA0) ||                                         \
    defined(TARGET_IS_TM4C129_RA1) ||                                         \
    defined(TARGET_IS_TM4C129_RA2)
    ui32SysClock = SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ |
                                       SYSCTL_OSC_MAIN |
                                       SYSCTL_USE_OSC), 25000000);
#else
    SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN |
                   SYSCTL_XTAL_16MHZ);
#endif

    //
    // Set up the serial console to use for displaying messages.  This is
    // just for this example program and is not needed for SSI operation.
    //
    //InitConsole2();

    //
    // Display the setup on the console.
    //
    //UARTprintf("SSI ->\n");
    //UARTprintf("  Mode: SPI\n");
    //UARTprintf("  Data: 8-bit\n\n");

    writeLine("SSI:");
    writeLine("  Mode: SPI");
    writeLine("  Data: 8-bit");


    //------------------------------------------------------------

//                //GPIO pull ups
//                GPIOPadConfigSet(GPIO_PORTG_BASE, GPIO_PIN_4,GPIO_STRENGTH_2MA,GPIO_PIN_TYPE_STD_WPU);
//                GPIOPadConfigSet(GPIO_PORTG_BASE, GPIO_PIN_5,GPIO_STRENGTH_2MA,GPIO_PIN_TYPE_STD_WPU);
//                GPIOPadConfigSet(GPIO_PORTG_BASE, GPIO_PIN_6,GPIO_STRENGTH_2MA,GPIO_PIN_TYPE_STD_WPU);
//                GPIOPadConfigSet(GPIO_PORTG_BASE, GPIO_PIN_7,GPIO_STRENGTH_2MA,GPIO_PIN_TYPE_STD_WPU);

    //
        // The SSI2 peripheral must be enabled for use.
        //
        SysCtlPeripheralReset(SYSCTL_PERIPH_SSI2);
        SysCtlPeripheralEnable(SYSCTL_PERIPH_SSI2);

        //
        // For this example SSI2 is used with PortG[7:4].  GPIO port G needs to be
        // enabled so these pins can be used.
        //
        SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOG);

        //
        // Configure the pin muxing for SSI2 functions on port G4, G5, G6 and G7.
        // This step is not necessary if your part does not support pin muxing.


        #define GPIO_PG4_SSI2TX GPIO_PG4_SSI2XDAT1 // AVI?
        #define GPIO_PG5_SSI2RX GPIO_PG5_SSI2XDAT0 // AVI?



        //
        GPIOPinConfigure(GPIO_PG7_SSI2CLK);
        GPIOPinConfigure(GPIO_PG6_SSI2FSS);
        GPIOPinConfigure(GPIO_PG5_SSI2RX);
        GPIOPinConfigure(GPIO_PG4_SSI2TX);

        //
        // Configure the GPIO settings for the SSI pins.  This function also gives
        // control of these pins to the SSI hardware.  Consult the data sheet to
        // see which functions are allocated per pin.
        // The pins are assigned as follows:
        //      PG4 - SSI2Tx
        //      PG5 - SSI2Rx
        //      PG6 - SSI2Fss
        //      PG7 - SSI2CLK
        //
        GPIOPinTypeSSI(GPIO_PORTG_BASE, GPIO_PIN_7 | GPIO_PIN_6 | GPIO_PIN_5 |
                GPIO_PIN_4);

        //
        // Configure and enable the SSI2 port for SPI Master mode.
        //
    #if defined(TARGET_IS_TM4C129_RA0) ||                                         \
        defined(TARGET_IS_TM4C129_RA1) ||                                         \
        defined(TARGET_IS_TM4C129_RA2)
        SSIConfigSetExpClk(SSI2_BASE, ui32SysClock, SSI_FRF_MOTO_MODE_0,
                           SSI_MODE_MASTER, 1000000, 8);
    #else
        SSIConfigSetExpClk(SSI2_BASE, SysCtlClockGet(), SSI_FRF_MOTO_MODE_0,
                           SSI_MODE_MASTER, 1000000, 8);
    #endif
        ///--------------------------------

        ///----------------------------

        //
        // Enable the SSI2 module.
        //
        SSIEnable(SSI2_BASE);
    //----------------------------------------------------------------


/*//---------------------------------------------------------------------
    //
    // The SSI0 peripheral must be enabled for use.
    //
    SysCtlPeripheralEnable(SYSCTL_PERIPH_SSI0);

    //
    // For this example SSI0 is used with PortA[5:2].  The actual port and pins
    // used may be different on your part, consult the data sheet for more
    // information.  GPIO port A needs to be enabled so these pins can be used.
    // TODO: change this to whichever GPIO port you are using.
    //
    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);

    //
    // Configure the pin muxing for SSI0 functions on port A2, A3, A4, and A5.
    // This step is not necessary if your part does not support pin muxing.
    // TODO: change this to select the port/pin you are using.
    //
    #define GPIO_PA4_SSI0RX         0x00001002 AVI?
    #define GPIO_PA5_SSI0TX         0x00001402 AVI ?

    GPIOPinConfigure(GPIO_PA2_SSI0CLK);
    GPIOPinConfigure(GPIO_PA3_SSI0FSS);
    GPIOPinConfigure(GPIO_PA4_SSI0RX);
    GPIOPinConfigure(GPIO_PA5_SSI0TX);

    //
    // Configure the GPIO settings for the SSI pins.  This function also gives
    // control of these pins to the SSI hardware.  Consult the data sheet to
    // see which functions are allocated per pin.
    // The pins are assigned as follows:
    //      PA5 - SSI0Tx
    //      PA4 - SSI0Rx
    //      PA3 - SSI0Fss
    //      PA2 - SSI0CLK
    // TODO: change this to select the port/pin you are using.
    //
    GPIOPinTypeSSI(GPIO_PORTA_BASE, GPIO_PIN_5 | GPIO_PIN_4 | GPIO_PIN_3 |
                   GPIO_PIN_2);

    //
    // Configure and enable the SSI port for SPI master mode.  Use SSI0,
    // system clock supply, idle clock level low and active low clock in
    // freescale SPI mode, master mode, 1MHz SSI frequency, and 8-bit data.
    // For SPI mode, you can set the polarity of the SSI clock when the SSI
    // unit is idle.  You can also configure what clock edge you want to
    // capture data on.  Please reference the datasheet for more information on
    // the different SPI modes.
    //
#if defined(TARGET_IS_TM4C129_RA0) ||                                         \
    defined(TARGET_IS_TM4C129_RA1) ||                                         \
    defined(TARGET_IS_TM4C129_RA2)
    SSIConfigSetExpClk(SSI0_BASE, ui32SysClock, SSI_FRF_MOTO_MODE_0,
                       SSI_MODE_MASTER, 1000000, 8);
#else
    SSIConfigSetExpClk(SSI0_BASE, SysCtlClockGet(), SSI_FRF_MOTO_MODE_0,
                       SSI_MODE_MASTER, 1000000, 8);
#endif

    //
    // Enable the SSI0 module.
    //
    SSIEnable(SSI0_BASE);*/

    unsigned char Loops = 1;
    while (Loops){
        //Loops--;
    //
    // Read any residual data from the SSI port.  This makes sure the receive
    // FIFOs are empty, so we don't read any unwanted junk.  This is done here
    // because the SPI SSI mode is full-duplex, which allows you to send and
    // receive at the same time.  The SSIDataGetNonBlocking function returns
    // "true" when data was returned, and "false" when no data was returned.
    // The "non-blocking" function checks if there is any data in the receive
    // FIFO and does not "hang" if there isn't.
    //
    while(SSIDataGetNonBlocking(SSI2_BASE, &pui32DataRx[0]))
    {
    }


    //-------------------------------------------------------------------------------------------
    //SDSPI_init();
    //SDSPITiva_open();

/*    SSIDataPut(SSI2_BASE,0xC0);
    SSIDataPut(SSI2_BASE,0x51);
    SSIDataPut(SSI2_BASE,0x0);
    SSIDataPut(SSI2_BASE,0xff);
    SSIDataPut(SSI2_BASE,0x0);*/

    pui32DataTx[0] = 0xC0;
    pui32DataTx[1] = 0x51;
    pui32DataTx[2] = 0x0;
    pui32DataTx[3] = 0xff;
    pui32DataTx[4] = 0x0;

    //------------------------------------------------------------------------------------------
    //
    // Initialize the data to send.
    //
/*
    pui32DataTx[0] = 'A';
    pui32DataTx[1] = 's';
    pui32DataTx[2] = 'p';
    pui32DataTx[3] = 'i';
    pui32DataTx[4] = 'A';
*/
    //
    // Display indication that the SSI is transmitting data.
    //
    //UARTprintf("Sent:\n  ");

    writeLine("Sent: ");

    //
    // Send 3 bytes of data.
    //
   // char temp[2];
    //temp[1] = '\0';

    for(ui32Index = 0; ui32Index < NUM_SSI_DATA; ui32Index++)
    {
        //
        // Display the data that SSI is transferring.
        //
        //UARTprintf("'%c' ", pui32DataTx[ui32Index]);


        //temp[0] = pui32DataTx[ui32Index];
        //writeString(temp);
        writeFloat (pui32DataTx[ui32Index]);
        writeString("   ");


        //
        // Send the data using the "blocking" put function.  This function
        // will wait until there is room in the send FIFO before returning.
        // This allows you to assure that all the data you send makes it into
        // the send FIFO.
        //
        SSIDataPut(SSI2_BASE, pui32DataTx[ui32Index]);
    }

    //
    // Wait until SSI2 is done transferring all the data in the transmit FIFO.
    //
    while(SSIBusy(SSI2_BASE))
    {
    }

    //
    // Display indication that the SSI is receiving data.
    //
    //UARTprintf("\nReceived:\n  ");
    writeLine("Received: ");

    //
    // Receive 3 bytes of data.
    //
    for(ui32Index = 0; ui32Index < NUM_SSI_DATA; ui32Index++)
    {
        //
        // Receive the data using the "blocking" Get function. This function
        // will wait until there is data in the receive FIFO before returning.
        //
        SSIDataGet(SSI2_BASE, &pui32DataRx[ui32Index]);

        //
        // Since we are using 8-bit data, mask off the MSB.
        //
        pui32DataRx[ui32Index] &= 0x00FF;

        //
        // Display the data that SSI2 received.
        //
        //UARTprintf("'%c' ", pui32DataRx[ui32Index]);

        //temp[0] = pui32DataRx[ui32Index];
        //writeString(temp);
        writeFloat (pui32DataRx[ui32Index]);
        writeString("   ");
    }

    //
    // Return no errors
    //
    Loops =2;

    }//while(1)
    return(0);
}