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//*****************************************************************************
//
// boot_demo_uart.c - UART boot loader example.
//
// Copyright (c) 2013-2014 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 DK-TM4C129X Firmware Package.
//
//*****************************************************************************
#include <stdbool.h>
#include <stdint.h>
#include "inc/hw_memmap.h"
#include "inc/hw_nvic.h"
#include "inc/hw_types.h"
#include "driverlib/rom.h"
#include "driverlib/rom_map.h"
#include "driverlib/sysctl.h"
#include "driverlib/uart.h"
#include "grlib/grlib.h"
#include "grlib/widget.h"
#include "drivers/frame.h"
#include "drivers/kentec320x240x16_ssd2119.h"
#include "drivers/pinout.h"
#include "drivers/touch.h"
//*****************************************************************************
//
//! \addtogroup example_list
//! <h1>Boot Loader UART Demo (boot_demo_uart)</h1>
//!
//! This example demonstrates the use of the ROM-based UART boot loader. When
//! the application runs, it will wait for the screen to be pressed (to
//! simulate an application waiting for a trigger to begin a firmware update)
//! and then branch to the UART boot loader in the ROM. The UART is configured
//! for a baud rate of 115,200 and does not require the use of auto-bauding.
//
//*****************************************************************************
//*****************************************************************************
//
// A global we use to keep track of when the user presses the screen.
//
//*****************************************************************************
volatile bool g_bFirmwareUpdate = false;
//*****************************************************************************
//
// The error routine that is called if the driver library encounters an error.
//
//*****************************************************************************
#ifdef DEBUG
void
__error__(char *pcFilename, unsigned long ulLine)
{
}
#endif
//*****************************************************************************
//
// This function is called in interrupt context by the touch screen driver when
// there is a pointer event.
//
//*****************************************************************************
int32_t
TSHandler(uint32_t ui32Message, int32_t i32X, int32_t i32Y)
{
//
// See if this is a pointer up message.
//
if(ui32Message == WIDGET_MSG_PTR_UP)
{
//
// The screen has been pressed and released, so begin the firmware
// update.
//
g_bFirmwareUpdate = true;
}
//
// Success.
//
return(0);
}
//*****************************************************************************
//
// A simple application demonstrating use of the boot loader,
//
//*****************************************************************************
int
main(void)
{
uint32_t ui32SysClock;
tContext sContext;
tRectangle sRect;
//
// Run from the PLL at 120 MHz.
//
ui32SysClock = MAP_SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ |
SYSCTL_OSC_MAIN | SYSCTL_USE_PLL |
SYSCTL_CFG_VCO_480), 120000000);
//
// Configure the device pins.
//
PinoutSet();
//
// Initialize the display driver.
//
Kentec320x240x16_SSD2119Init(ui32SysClock);
//
// Initialize the graphics context.
//
GrContextInit(&sContext, &g_sKentec320x240x16_SSD2119);
//
// Draw the application frame.
//
FrameDraw(&sContext, "boot-demo-uart");
//
// Print instructions on the screen.
//
GrStringDrawCentered(&sContext, "Press the screen to start", -1, 160, 108,
false);
GrStringDrawCentered(&sContext, "the update process", -1, 160, 128, false);
//
// Initialize the touch screen driver.
//
TouchScreenInit(ui32SysClock);
//
// Set the touch screen event handler.
//
TouchScreenCallbackSet(TSHandler);
//
// Enable the UART that will be used for the firmware update.
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);
//
// Configure the UART for 115200, 8-N-1.
//
ROM_UARTConfigSetExpClk(UART0_BASE, ui32SysClock, 115200,
(UART_CONFIG_PAR_NONE | UART_CONFIG_STOP_ONE |
UART_CONFIG_WLEN_8));
//
// Enable the UART operation.
//
ROM_UARTEnable(UART0_BASE);
//
// Wait until the screen has been pressed, indicating that the firwmare
// update should begin.
//
while(!g_bFirmwareUpdate)
{
}
//
// Clear the screen.
//
sRect.i16XMin = 0;
sRect.i16YMin = 0;
sRect.i16XMax = 319;
sRect.i16YMax = 239;
GrContextForegroundSet(&sContext, ClrBlack);
GrRectFill(&sContext, &sRect);
//
// Indicate that the firmware update is about to start.
//
GrContextForegroundSet(&sContext, ClrWhite);
GrStringDrawCentered(&sContext, "Update process started...", -1, 160, 98,
false);
GrStringDrawCentered(&sContext, "Using UART0 with", -1, 160, 138, false);
GrStringDrawCentered(&sContext, "115,200 baud, 8-N-1.", -1, 160, 158,
false);
//
// Disable all processor interrupts. Instead of disabling them one at a
// time, a direct write to NVIC is done to disable all peripheral
// interrupts.
//
HWREG(NVIC_DIS0) = 0xffffffff;
HWREG(NVIC_DIS1) = 0xffffffff;
HWREG(NVIC_DIS2) = 0xffffffff;
HWREG(NVIC_DIS3) = 0xffffffff;
HWREG(NVIC_DIS4) = 0xffffffff;
//
// Call the ROM UART boot loader.
//
ROM_UpdateUART();
//
// The boot loader should not return. In the off chance that it does,
// enter a dead loop.
//
while(1)
{
}
}
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