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//*****************************************************************************
//
// timers.c - Timers 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_ints.h"
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "driverlib/interrupt.h"
#include "driverlib/rom.h"
#include "driverlib/rom_map.h"
#include "driverlib/sysctl.h"
#include "driverlib/timer.h"
#include "grlib/grlib.h"
#include "drivers/frame.h"
#include "drivers/kentec320x240x16_ssd2119.h"
#include "drivers/pinout.h"
//*****************************************************************************
//
//! \addtogroup example_list
//! <h1>Timer (timers)</h1>
//!
//! This example application demonstrates the use of the timers to generate
//! periodic interrupts. One timer is set up to interrupt once per second and
//! the other to interrupt twice per second; each interrupt handler will toggle
//! its own indicator on the display.
//
//*****************************************************************************
//*****************************************************************************
//
// Flags that contain the current value of the interrupt indicator as displayed
// on the display.
//
//*****************************************************************************
uint32_t g_ui32Flags;
//*****************************************************************************
//
// Graphics context used to show text on the display.
//
//*****************************************************************************
tContext g_sContext;
//*****************************************************************************
//
// The error routine that is called if the driver library encounters an error.
//
//*****************************************************************************
#ifdef DEBUG
void
__error__(char *pcFilename, uint32_t ui32Line)
{
}
#endif
//*****************************************************************************
//
// The interrupt handler for the first timer interrupt.
//
//*****************************************************************************
void
Timer0IntHandler(void)
{
//
// Clear the timer interrupt.
//
ROM_TimerIntClear(TIMER0_BASE, TIMER_TIMA_TIMEOUT);
//
// Toggle the flag for the first timer.
//
HWREGBITW(&g_ui32Flags, 0) ^= 1;
//
// Update the interrupt status on the display.
//
ROM_IntMasterDisable();
GrStringDraw(&g_sContext, (HWREGBITW(&g_ui32Flags, 0) ? "1" : "0"), -1,
195, 108, 1);
ROM_IntMasterEnable();
}
//*****************************************************************************
//
// The interrupt handler for the second timer interrupt.
//
//*****************************************************************************
void
Timer1IntHandler(void)
{
//
// Clear the timer interrupt.
//
ROM_TimerIntClear(TIMER1_BASE, TIMER_TIMA_TIMEOUT);
//
// Toggle the flag for the second timer.
//
HWREGBITW(&g_ui32Flags, 1) ^= 1;
//
// Update the interrupt status on the display.
//
ROM_IntMasterDisable();
GrStringDraw(&g_sContext, (HWREGBITW(&g_ui32Flags, 1) ? "1" : "0"), -1,
195, 128, 1);
ROM_IntMasterEnable();
}
//*****************************************************************************
//
// This example application demonstrates the use of the timers to generate
// periodic interrupts.
//
//*****************************************************************************
int
main(void)
{
uint32_t ui32SysClock;
//
// 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(&g_sContext, &g_sKentec320x240x16_SSD2119);
//
// Draw the application frame.
//
FrameDraw(&g_sContext, "timers");
//
// Initialize timer status display.
//
GrStringDraw(&g_sContext, "Timer 0:", -1, 100, 108, 0);
GrStringDraw(&g_sContext, "Timer 1:", -1, 100, 128, 0);
//
// Enable the peripherals used by this example.
//
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER0);
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER1);
//
// Enable processor interrupts.
//
ROM_IntMasterEnable();
//
// Configure the two 32-bit periodic timers.
//
ROM_TimerConfigure(TIMER0_BASE, TIMER_CFG_PERIODIC);
ROM_TimerConfigure(TIMER1_BASE, TIMER_CFG_PERIODIC);
ROM_TimerLoadSet(TIMER0_BASE, TIMER_A, ui32SysClock);
ROM_TimerLoadSet(TIMER1_BASE, TIMER_A, ui32SysClock / 2);
//
// Setup the interrupts for the timer timeouts.
//
ROM_IntEnable(INT_TIMER0A);
ROM_IntEnable(INT_TIMER1A);
ROM_TimerIntEnable(TIMER0_BASE, TIMER_TIMA_TIMEOUT);
ROM_TimerIntEnable(TIMER1_BASE, TIMER_TIMA_TIMEOUT);
//
// Enable the timers.
//
ROM_TimerEnable(TIMER0_BASE, TIMER_A);
ROM_TimerEnable(TIMER1_BASE, TIMER_A);
//
// Loop forever while the timers run.
//
while(1)
{
}
}
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