//*****************************************************************************
//
// hello.c - Simple hello world example.
//
// Copyright (c) 2011-2014 Texas Instruments Incorporated.  All rights reserved.
// Software License Agreement
// 
// Texas Instruments (TI) is supplying this software for use solely and
// exclusively on TI's microcontroller products. The software is owned by
// TI and/or its suppliers, and is protected under applicable copyright
// laws. You may not combine this software with "viral" open-source
// software in order to form a larger program.
// 
// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
// DAMAGES, FOR ANY REASON WHATSOEVER.
// 
// This is part of revision 2.1.0.12573 of the EK-LM4F232 Firmware Package.
//
//*****************************************************************************

#include <stdint.h>
#include <stdbool.h>
#include "inc/hw_memmap.h"
#include "driverlib/fpu.h"
#include "driverlib/sysctl.h"
#include "driverlib/rom.h"
#include "driverlib/pin_map.h"
#include "driverlib/uart.h"
#include "grlib/grlib.h"
#include "drivers/cfal96x64x16.h"
#include "utils/uartstdio.h"
#include "driverlib/gpio.h"

//*****************************************************************************
//
//! \addtogroup example_list
//! <h1>Hello World (hello)</h1>
//!
//! A very simple ``hello world'' example.  It simply displays ``Hello World!''
//! on the display and is a starting point for more complicated applications.
//! This example uses calls to the TivaWare Graphics Library graphics
//! primitives functions to update the display.  For a similar example using
//! widgets, please see ``hello_widget''.
//
//*****************************************************************************

//*****************************************************************************
//
// The error routine that is called if the driver library encounters an error.
//
//*****************************************************************************
#ifdef DEBUG
void
__error__(char *pcFilename, uint32_t ui32Line)
{
}
#endif

//*****************************************************************************
//
// Configure the UART and its pins.  This must be called before UARTprintf().
//
//*****************************************************************************
void
ConfigureUART(void)
{
    //
    // Enable the GPIO Peripheral used by the UART.
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);

    //
    // Enable UART0
    //
    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);

    //
    // Configure GPIO Pins for UART mode.
    //
    ROM_GPIOPinConfigure(GPIO_PA0_U0RX);
    ROM_GPIOPinConfigure(GPIO_PA1_U0TX);
    ROM_GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);

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

    //
    // Initialize the UART for console I/O.
    //
    UARTStdioConfig(0, 115200, 16000000);
}

//*****************************************************************************
//
// Print "Hello World!" to the display.
//
//*****************************************************************************
int
main(void)
{
    tContext sContext;
    tRectangle sRect;

    //
    // Enable lazy stacking for interrupt handlers.  This allows floating-point
    // instructions to be used within interrupt handlers, but at the expense of
    // extra stack usage.
    //
    ROM_FPULazyStackingEnable();

    //
    // Set the clocking to run directly from the crystal.
    //
    ROM_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_XTAL_16MHZ |
                       SYSCTL_OSC_MAIN);

    //
    // Initialize the UART.
    //
    ConfigureUART();

    UARTprintf("Hello, world!\n");

    //
    // Initialize the display driver.
    //
    CFAL96x64x16Init();

    //
    // Initialize the graphics context.
    //
    GrContextInit(&sContext, &g_sCFAL96x64x16);

    //
    // Fill the top 24 rows of the screen with blue to create the banner.
    //
    sRect.i16XMin = 0;
    sRect.i16YMin = 0;
    sRect.i16XMax = GrContextDpyWidthGet(&sContext) - 1;
    sRect.i16YMax = 23;
    GrContextForegroundSet(&sContext, ClrDarkBlue);
    GrRectFill(&sContext, &sRect);

    //
    // Put a white box around the banner.
    //
    GrContextForegroundSet(&sContext, ClrWhite);
    GrRectDraw(&sContext, &sRect);

    //
    // Put the application name in the middle of the banner.
    //
    GrContextFontSet(&sContext, g_psFontCm12);
    GrStringDrawCentered(&sContext, "hello", -1,
                         GrContextDpyWidthGet(&sContext) / 2, 10, 0);

    //
    // Say hello using the Computer Modern 40 point font.
    //
    GrContextFontSet(&sContext, g_psFontCm12/*g_psFontFixed6x8*/);
    GrStringDrawCentered(&sContext, "Hello World!", -1,
                         GrContextDpyWidthGet(&sContext) / 2,
                         ((GrContextDpyHeightGet(&sContext) - 24) / 2) + 24,
                         0);

    //
    // Flush any cached drawing operations.
    //
    GrFlush(&sContext);

    //
    // We are finished. Hang around doing nothing.
    //
    while(1)
    {
    }
}