#include"tm4c123gh6pm.h"
#include <stdint.h>
#include <stdbool.h>
#include "pin_map.h"
#include "gpio.h"
#include "hw_memmap.h"
#include "hw_types.h"
#include "sysctl.h"
#include "i2c.h"
#include "interrupt.h"
#include "hw_i2c.h"
#include "systick.h"
#define TARGET_IS_BLIZZARD_RB1
#include "rom.h"

#define I2C_O_MTPR              0x0000000C  // I2C Master Timer Period
#define I2C_HS_PREAMBLE		    0000100

#define GPIO_PA6_I2C1SCL        0x00001803
#define GPIO_PA7_I2C1SDA        0x00001C03
#define I2C_MCS_HS 				0x00000010 // High-Speed Enable
#define I2C_MTPR_HS				0x00000080 // High-Speed Enable
#define I2C_PP_HS               0x00000001  // High-Speed Capable
#define I2C_PC_HS               0x00000001  // High-Speed Capable

unsigned char sec,min,hour;
uint32_t ui32TPR;

void Master_Transmit_Receive()
{
	ROM_I2CMasterSlaveAddrSet(I2C1_BASE, 0x68, false);

	ROM_I2CMasterSlaveAddrSet(I2C1_BASE, I2C_HS_PREAMBLE, true);

	ROM_I2CMasterControl(I2C1_BASE, I2C_MASTER_CMD_HS_MASTER_CODE_SEND);

	while(ROM_I2CMasterBusy(I2C1_BASE)){};

	ROM_I2CMasterSlaveAddrSet(I2C1_BASE, 0x68, false);

	ROM_I2CMasterControl(I2C1_BASE, I2C_MASTER_CMD_BURST_SEND_START);

	ROM_I2CMasterDataPut(I2C1_BASE, 0x00);

	while(ROM_I2CMasterBusy(I2C1_BASE)){};

	ROM_I2CMasterDataPut(I2C1_BASE, 0x00); //sec

	ROM_I2CMasterControl(I2C1_BASE, I2C_MASTER_CMD_BURST_SEND_CONT);

	while(ROM_I2CMasterBusy(I2C1_BASE));

	ROM_I2CMasterDataPut(I2C1_BASE, 0x00);//MIN

	ROM_I2CMasterControl(I2C1_BASE, I2C_MASTER_CMD_BURST_SEND_CONT);

	while(ROM_I2CMasterBusy(I2C1_BASE));

	ROM_I2CMasterDataPut(I2C1_BASE, 0x00);//HOUR

	ROM_I2CMasterControl(I2C1_BASE, I2C_MASTER_CMD_BURST_SEND_CONT);

	while(ROM_I2CMasterBusy(I2C1_BASE));

	while(1)
	{
        ROM_I2CMasterSlaveAddrSet(I2C1_BASE, 0x68, false);

        ROM_I2CMasterControl(I2C1_BASE, I2C_MASTER_CMD_BURST_SEND_START);

        ROM_I2CMasterDataPut(I2C1_BASE, 0x00);

        ROM_I2CMasterControl(I2C1_BASE, I2C_MASTER_CMD_BURST_SEND_FINISH);

        while(ROM_I2CMasterBusy(I2C1_BASE));

        ROM_I2CMasterSlaveAddrSet(I2C1_BASE, 0x68, true);

        ROM_I2CMasterControl(I2C1_BASE, I2C_MASTER_CMD_BURST_RECEIVE_START);

        while(ROM_I2CMasterBusy(I2C1_BASE));

        sec = ROM_I2CMasterDataGet(I2C1_BASE);

        ROM_I2CMasterControl(I2C1_BASE, I2C_MASTER_CMD_BURST_RECEIVE_CONT);

        while(ROM_I2CMasterBusy(I2C1_BASE));



        min = ROM_I2CMasterDataGet(I2C1_BASE);

        ROM_I2CMasterControl(I2C1_BASE, I2C_MASTER_CMD_BURST_RECEIVE_CONT);

        while(ROM_I2CMasterBusy(I2C1_BASE));


        hour = ROM_I2CMasterDataGet(I2C1_BASE);

        ROM_I2CMasterControl(I2C1_BASE, I2C_MASTER_CMD_BURST_RECEIVE_CONT);

        while(ROM_I2CMasterBusy(I2C1_BASE));

        ROM_I2CMasterControl(I2C1_BASE, I2C_MASTER_CMD_FIFO_BURST_RECEIVE_FINISH);

	}
}

int main(void)
{

    //ROM_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN | SYSCTL_XTAL_16MHZ);
    ROM_SysCtlClockSet(SYSCTL_SYSDIV_5 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN | SYSCTL_XTAL_16MHZ);

    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_I2C1);

    ROM_GPIOPinConfigure(GPIO_PA6_I2C1SCL);
    ROM_GPIOPinConfigure(GPIO_PA7_I2C1SDA);

    ROM_GPIOPinTypeI2CSCL(GPIO_PORTA_BASE, GPIO_PIN_6);
    ROM_GPIOPinTypeI2C(GPIO_PORTA_BASE, GPIO_PIN_7);

    //ROM_GPIOPadConfigSet(GPIO_PORTA_BASE, GPIO_PIN_6 | GPIO_PIN_7, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD_WPU);
    //ROM_GPIOPadConfigSet(GPIO_PORTA_BASE, GPIO_PIN_7, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_OD);

    //ROM_GPIODirModeSet(GPIO_PORTA_BASE, GPIO_PIN_6, GPIO_DIR_MODE_HW);
    //ROM_GPIODirModeSet(GPIO_PORTA_BASE, GPIO_PIN_7, GPIO_DIR_MODE_HW);

    ROM_I2CMasterInitExpClk(I2C1_BASE, ROM_SysCtlClockGet(), false);

    //ui32TPR = 0x01;
    //HWREG(I2C1_BASE+I2C_O_MTPR) = ui32TPR;


    Master_Transmit_Receive();

}