//*****************************************************************************
//
// MSP432 main.c template - Empty main
//
//****************************************************************************

/* DriverLib Includes */
#include "driverlib.h"

/* Standard Includes */
#include <stdint.h>

#include <stdbool.h>

/* Statics */
static volatile uint8_t RXData = 0;


/* SPI Master Configuration Parameter */
const eUSCI_SPI_MasterConfig spiMasterConfig =
{
        EUSCI_B_SPI_CLOCKSOURCE_SMCLK,             // SMCLK Clock Source
        3000000,                                   // SMCLK = DCO = 3MHZ
        500000,                                    // SPICLK = 500khz
        EUSCI_B_SPI_MSB_FIRST,                     // MSB First
        EUSCI_B_SPI_PHASE_DATA_CHANGED_ONFIRST_CAPTURED_ON_NEXT,    // Phase
        EUSCI_B_SPI_CLOCKPOLARITY_INACTIVITY_HIGH, // High polarity
        EUSCI_B_SPI_3PIN                           // 3Wire SPI Mode
};
const eUSCI_UART_Config uartConfig =
{
        EUSCI_A_UART_CLOCKSOURCE_SMCLK,          // SMCLK Clock Source
        1,                                     // BRDIV = 78
        8,                                       // UCxBRF = 2
        0,                                       // UCxBRS = 0
        EUSCI_A_UART_NO_PARITY,                  // No Parity
        EUSCI_A_UART_LSB_FIRST,                  // MSB First
        EUSCI_A_UART_ONE_STOP_BIT,               // One stop bit
        EUSCI_A_UART_MODE,                       // UART mode
        EUSCI_A_UART_OVERSAMPLING_BAUDRATE_GENERATION  // Oversampling
};



int main(void)
{
    /* Halting the Watchdog */
    MAP_WDT_A_holdTimer();
    /*
        * If going to run DCO at 48Mhz then you need to run at
        * Vcore1 and Flash wait state 1
        */
       MAP_PCM_setCoreVoltageLevel(PCM_VCORE1);
       /*
           * Revision C silicon supports wait states of 1 at 48Mhz
           * Revision B (black launchpad) requires 2
           */
          MAP_FlashCtl_setWaitState(FLASH_BANK0, 2);
          MAP_FlashCtl_setWaitState(FLASH_BANK1, 2);
          /* Setting DCO to 48MHz */
              MAP_CS_setDCOCenteredFrequency(CS_DCO_FREQUENCY_48);

              MAP_CS_initClockSignal(CS_SMCLK, CS_DCOCLK_SELECT, CS_CLOCK_DIVIDER_2);

              /* Enabling the FPU for floating point operation */
                 MAP_FPU_enableModule();
                 MAP_FPU_enableLazyStacking();

                 /* Selecting P1.2 and P1.3 in UART mode */
                    MAP_GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P1,
                             GPIO_PIN1 | GPIO_PIN2 | GPIO_PIN3, GPIO_PRIMARY_MODULE_FUNCTION);

                    MAP_UART_initModule(EUSCI_A0_BASE, &uartConfig);




                    UART_enableInterrupt(EUSCI_A0_BASE, EUSCI_A_UART_RECEIVE_INTERRUPT);
                    Interrupt_enableInterrupt(INT_EUSCIA0);

                    MAP_UART_enableModule(EUSCI_A0_BASE);

                    /* Selecting P1.5 P1.6 and P1.7 in SPI mode */
                        GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P1,
                                GPIO_PIN5 | GPIO_PIN6 | GPIO_PIN7, GPIO_PRIMARY_MODULE_FUNCTION);

                        SPI_disableInterrupt(EUSCI_B0_BASE, EUSCI_B_SPI_RECEIVE_INTERRUPT);
                        Interrupt_disableInterrupt(INT_EUSCIB0);
                        while (1)
                            {
                                MAP_PCM_gotoLPM0();
                            }

}



void UART_receive_IRQ(void)
{
	uint32_t status = MAP_UART_getEnabledInterruptStatus(EUSCI_A0_BASE);

	    MAP_UART_clearInterruptFlag(EUSCI_A0_BASE, status);

	    if(status & EUSCI_A_UART_RECEIVE_INTERRUPT_FLAG)
	    {
	        RXData = MAP_UART_receiveData(EUSCI_A0_BASE);
	        {
	        	SPI_transmitData(EUSCI_B0_BASE, RXData);
	        }


	        MAP_Interrupt_disableSleepOnIsrExit();
	    }

}