#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "driverlib/gpio.h"
#include "driverlib/uart.h"
#include "utils/uartstdio.h"
#include "driverlib/sysctl.h"
#include "driverlib/interrupt.h"
#include "inc/hw_ints.h"

//*****************************************************************************
// 數(shù)據(jù)類型定義區(qū)
//*****************************************************************************
typedef unsigned char BYTE; // 8 bit
typedef unsigned short WORD; // 16 bit
typedef unsigned long DWORD; // 32 bit
typedef enum {FALSE = 0, TRUE = !FALSE} bool;

/* 寄存器地址 ---------------------------------------------------------------*/
#define GPIO_PORTF_APB_DIR_R 0x40025400
#define GPIO_PORTF_APB_DEN_R 0x4002551C

/* 用于調(diào)試 PF1 <-> LED -----------------------------------------------------*/
#define LED_PERIPH SYSCTL_PERIPH_GPIOF
#define LED_PORT GPIO_PORTF_BASE
#define LED_PIN GPIO_PIN_1
#define LED_OFF 1 << 1
#define LED_ON ~(1 << 1) // 低電平點(diǎn)亮LED


//*****************************************************************************
//
// 延時(shí)函數(shù)
//
//*****************************************************************************
void Delay(volatile signed long nCount)
{
for(; nCount != 0; nCount--);
}

//*****************************************************************************
//
// LED初始化函數(shù)，用于調(diào)試timer, watchdog等
//
//*****************************************************************************
void LED_Init(void)
{
// 使能LED所在的GPIO端口
SysCtlPeripheralEnable(LED_PERIPH);

// 設(shè)置LED所在管腳為輸出
GPIOPinTypeGPIOOutput(LED_PORT, LED_PIN);

// 熄滅LED（默認(rèn)LED是點(diǎn)亮的，低電平點(diǎn)亮LED）
GPIOPinWrite(LED_PORT, LED_PIN, LED_ON);
}

//*****************************************************************************
//
// PJ7管腳設(shè)置為，雙沿觸發(fā)中斷方式
//
//*****************************************************************************
void GPIO_PJ7_Init(void)
{
// 使能GPIOJ端口
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOJ);

// 設(shè)置PJ7管腳為輸入
GPIOPinTypeGPIOInput(GPIO_PORTJ_BASE, GPIO_PIN_7);

// 配置PJ7管腳帶弱上拉電阻
GPIOPadConfigSet(GPIO_PORTJ_BASE, GPIO_PIN_7, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD_WPU);

// 設(shè)置PJ7管腳的中斷類型，雙沿觸發(fā)
GPIOIntTypeSet(GPIO_PORTJ_BASE, GPIO_PIN_7, GPIO_BOTH_EDGES);
UARTprintf("PJ7 is high at begin ->n");

// 使能GPIOJ端口中斷
IntEnable(INT_GPIOJ);

// 使能PJ7管腳的中斷
GPIOPinIntEnable(GPIO_PORTJ_BASE, GPIO_PIN_7);
}

//*****************************************************************************
//
// This function sets up UART2 to be used for a console to display information
// as the example is running.
//
//*****************************************************************************
void InitConsole(void)
{
// Enable GPIO port D which is used for UART2 pins.
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);

// Select the alternate (UART) function for these pins.
GPIOPinTypeUART(GPIO_PORTD_BASE, GPIO_PIN_0 | GPIO_PIN_1);

// Configure the pin muxing for UART0 functions on port A0 and A1.
// This step is not necessary if your part does not support pin muxing.
GPIOPinConfigure(GPIO_PD0_U2RX);
GPIOPinConfigure(GPIO_PD1_U2TX);

// Initialize the UART for console I/O.
UARTStdioInit(2);

UARTprintf("Uart2 is ready ->n");
}


//*****************************************************************************
//
// 主函數(shù)
//
//*****************************************************************************
int main(void)
{
// Set the clocking to run directly from the crystal.
SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN | SYSCTL_XTAL_16MHZ);

LED_Init(); // 初始化LED，輸出

InitConsole(); // UART2初始化

GPIO_PJ7_Init(); // 初始化PJ7管腳，輸入

IntMasterEnable(); // 開總中斷

GPIOPinWrite(LED_PORT, LED_PIN, LED_OFF);
Delay(0xFFFFF);
GPIOPinWrite(LED_PORT, LED_PIN, LED_ON);
Delay(0xFFFFF);
GPIOPinWrite(LED_PORT, LED_PIN, LED_OFF);
Delay(0xFFFFF);
GPIOPinWrite(LED_PORT, LED_PIN, LED_ON);
Delay(0xFFFFF);
GPIOPinWrite(LED_PORT, LED_PIN, LED_OFF);
Delay(0xFFFFF);
GPIOPinWrite(LED_PORT, LED_PIN, LED_ON);
Delay(0xFFFFF);

while (1)
{
Delay(0xFFFFF); // 646ms
}
}


//*****************************************************************************
//
// PJ7管腳的中斷服務(wù)函數(shù)，雙沿觸發(fā)
//
//*****************************************************************************
void GPIO_Port_J_ISR(void)
{
// 讀取中斷狀態(tài)，GPIOJ端口的8個管腳都可能觸發(fā)中斷
DWORD Status = GPIOPinIntStatus(GPIO_PORTJ_BASE, true);

// 清除中斷狀態(tài)，重要
GPIOPinIntClear(GPIO_PORTJ_BASE, Status);

if ((Status & GPIO_PIN_7) != 0)
{
// 上升沿中斷處理函數(shù)
if (0x00000080 == GPIOPinRead(GPIO_PORTJ_BASE, GPIO_PIN_7))
{
UARTprintf("PJ7 is low to high ->n");
Delay(0xFFFFF);
}
else if (0 == GPIOPinRead(GPIO_PORTJ_BASE, GPIO_PIN_7)) // 下降沿中斷處理函數(shù)
{
UARTprintf("PJ7 is high to low ->n");
Delay(0xFFFFF);
}
}
}