说明：第二部分为驱动程序核心部分，需要第二部分：http://www.51hei.com/bbs/dpj-31563-1.html
第二部分LCD.h文件：
LCD.h文件
#ifndef __LCD_H__
#define __LCD_H__
#define TESTBIT(a,b) ((a)&(1<<(b)))
#define LCD_RS_Low() LPC_GPIO2->DATA &=~(1<<8) //给P2.8位写0
#define LCD_RS_High() LPC_GPIO2->DATA |=(1<<8) //给P2.8位写1
#define LCD_RW_Low() LPC_GPIO2->DATA &=~(1<<9) //给P2.9位写0
#define LCD_RW_High() LPC_GPIO2->DATA |=(1<<9) //给P2.9位写1
#define LCD_EN_Low() LPC_GPIO2->DATA &=~(1<<10) //给P2.10位写0
#define LCD_EN_High() LPC_GPIO2->DATA |=(1<<10) //给P2.10位写1
void Set_GPIO_Output(void);
void Set_GPIO_Input(void);
void LCD_GPIO_Init(void);
void Write_Data_Port(unsigned char Data);
unsigned char Read_Data_Port(void);
unsigned char Chk_LCD_busy(void);
void Write_LCD_command(unsigned char gcmd,unsigned char gvalue);
void Write_LCD_data(unsigned char gdata);
void INIT_LCD(void);
void Display_LCD_string(unsigned char gadd_start,unsigned char gline,unsigned char glength,const unsigned char *pdata);
void DispChar_XY_LCD(unsigned char x,unsigned char y,unsigned char gdata);
void DispNum_XY_LCD(unsigned char x,unsigned char y,unsigned char gdata);
void Clear_Display(void);
#endif
system_LPX11xx.c(时钟配置程序)
#include <stdint.h>
#include "LPC11xx.h"
#define CLOCK_SETUP 0
#define MAIN_PLL_SETUP 0
#define MAIN_CLKSRCSEL_Val 0x00000001
#define MAIN_PLL_M_Val 0x00000003
#define MAIN_PLL_P_Val 0x00000001
#define SYS_AHB_DIV_Val 4/* 1 through 255, typical is 1 or 2 or 4 */
/*
//-------- <<< end of configuration section >>> ------------------------------
*/
/*----------------------------------------------------------------------------
DEFINES
*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
Define clocks
*----------------------------------------------------------------------------*/
#define XTAL (12000000UL) /* Oscillator frequency */
#define OSC_CLK ( XTAL) /* Main oscillator frequency */
#define IRC_OSC (12000000UL) /* Internal RC oscillator frequency */
#define WDT_OSC ( 250000UL) /* WDT oscillator frequency */
/*----------------------------------------------------------------------------
Clock Variable definitions
*----------------------------------------------------------------------------*/
uint32_t ClockSource = IRC_OSC;
uint32_t SystemFrequency = IRC_OSC; /*!< System Clock Frequency (Core Clock) */
uint32_t SystemAHBFrequency = IRC_OSC;
/**
* Misc. clock generation modules
*
* @param none
* @return none
*
* @brief Setup the microcontroller system.
* Initialize the System and update the SystemFrequency variable.
*/
void Main_PLL_Setup ( void )
{
uint32_t regVal;
ClockSource = OSC_CLK;
LPC_SYSCON->SYSPLLCLKSEL = MAIN_CLKSRCSEL_Val; /* Select system OSC--PLL时钟源选中系统振荡器 */
LPC_SYSCON->SYSPLLCLKUEN = 0x01; /* Update clock source */
LPC_SYSCON->SYSPLLCLKUEN = 0x00; /* toggle Update register once */
LPC_SYSCON->SYSPLLCLKUEN = 0x01;
while ( !(LPC_SYSCON->SYSPLLCLKUEN & 0x01) ); /* Wait until updated 等待系统振荡器锁定*/
regVal = LPC_SYSCON->SYSPLLCTRL;
regVal &= ~0x1FF;
LPC_SYSCON->SYSPLLCTRL = (regVal | (MAIN_PLL_P_Val<<5) | MAIN_PLL_M_Val);/* P=1, M=4 */
/* Enable main system PLL, main system PLL bit 7 in PDRUNCFG. */
LPC_SYSCON->PDRUNCFG &= ~(0x1<<7); /* PDRUNCFG第七位写0，即系统PLL上电 */
while ( !(LPC_SYSCON->SYSPLLSTAT & 0x01) ); /* Wait until it's locked */
LPC_SYSCON->MAINCLKSEL = 0x01; /* Select PLL clock output--选择PLL输出作为主时钟 */
LPC_SYSCON->MAINCLKUEN = 0x01; /* Update MCLK clock source --允许更新主时钟*/
LPC_SYSCON->MAINCLKUEN = 0x00; /* Toggle update register once */
LPC_SYSCON->MAINCLKUEN = 0x01;
while ( !(LPC_SYSCON->MAINCLKUEN & 0x01) ); /* Wait until updated 等待主时钟锁定*/
LPC_SYSCON->SYSAHBCLKDIV = SYS_AHB_DIV_Val; /* SYS AHB clock, typical is 1 or 2 or 4 --SYSAHBCLKDIV的值为1，即不分频 AHB时钟为12*4=48MHz*/
#if MAIN_PLL_SETUP
SystemFrequency = ClockSource * (MAIN_PLL_M_Val+1); /*系统时钟=时钟源*4MHz*/
#else
SystemFrequency = ClockSource;
#endif
SystemAHBFrequency = (uint32_t)(SystemFrequency/SYS_AHB_DIV_Val); /*AHB时钟=系统时钟/AHB分频值*/
return;
}
/**
* Initialize the system
*
* @param none
* @return none
*
* @brief Setup the microcontroller system.
* Initialize the System and update the SystemFrequency variable.
*/
void SystemInit (void)
{
//uint32_t i;
#ifdef __DEBUG_RAM
LPC_SYSCON->SYSMEMREMAP = 0x1;/* remap to internal RAM */
#else
#ifdef __DEBUG_FLASH
LPC_SYSCON->SYSMEMREMAP = 0x2;/* remap to internal flash */
#endif
#endif
#if (CLOCK_SETUP) /* Clock Setup */
/* bit 0 default is crystal bypass,
bit1 0=0~20Mhz crystal input, 1=15~50Mhz crystal input. */
LPC_SYSCON->SYSOSCCTRL = 0x01;
/* main system OSC run is cleared, bit 5 in PDRUNCFG register */
LPC_SYSCON->PDRUNCFG &= ~(0x1<<5); /* PDRUNCFG的第五位写0，即系统系统振荡器上电 */
/* Wait 200us for OSC to be stablized, no status
indication, dummy wait. */
for ( i = 0; i < 0x100; i++ );
#if (MAIN_PLL_SETUP)
Main_PLL_Setup();
#endif
#endif/* endif CLOCK_SETUP */
/* System clock to the IOCON needs to be enabled or
most of the I/O related peripherals won't work. */
LPC_SYSCON->SYSAHBCLKCTRL |= (1<<16); //使能IO配置模块的时钟
LPC_SYSCON->SYSAHBCLKCTRL |= (1<<8); //开启定时器Timer16_1时钟
LPC_SYSCON->SYSAHBCLKDIV = SYS_AHB_DIV_Val;
SystemAHBFrequency = (uint32_t)(SystemFrequency/SYS_AHB_DIV_Val); /*AHB时钟=系统时钟/AHB分频值*/
return;
}
main.c程序：
#include "LPC11XX.h"
#include "gpio.h"
#include "timer16.h"
#include "main.h"
#include "Delay.h"
#include "LCD.h"
#include "Key.h"
const unsigned char P[] = {"Bei-Jing"};
int main(void)
{
SystemInit(); //系统初始化--主要是设置主时钟和开启所需模块时钟
GPIOInit(); //GPIO初始化--主要是开启GPIO时钟
LPC_IOCON->PIO0_3 &= (~0x07); //设置P2.0为GPIO
LPC_GPIO0->DIR |= (0x1<<3); //设置P0.3为输出
INIT_LCD();
DispChar_XY_LCD(15, 0, 'A'); //显示A
DispChar_XY_LCD(15, 1, 'Y'); //显示Y
Display_LCD_string(1, 0, 8, P);
Display_LCD_string(1, 1, 8, P);
while(1)
{
GPIOSetValue( 0, 3, 0 ); //给P0.3位写0
Delay_Ms(1000); //延时
GPIOSetValue( 0, 3, 1 ); //给P0.3位写1
Delay_Ms(1000); //延时
}
}
Delay.c程序：(延时程序使用Timer16_1实现)
#include "LPC11XX.h"
#include "gpio.h"
#include "timer16.h"
#include "Delay.h"
/*系统时钟配置为48MHz，AHB不分频，一次定时器时钟为48Mhz，因此得出以下分频值，匹配值*/
void Delay_Us(unsigned int DelayTimes) /** setup timer #1 for delay */
{
//LPC_SYSCON->SYSAHBCLKCTRL |= (1<<8); /*开启定时器Timer16_1时钟--时钟配置中开启该时钟*/
LPC_TMR16B1->TCR = 0x02; /* reset timer */
LPC_TMR16B1->PR = 3; /* set prescaler to zero 根据AHB时钟确定分频值*/
LPC_TMR16B1->MR0 = DelayTimes; /* 所需的延时时间 */
LPC_TMR16B1->IR = 0xff; /* reset all interrrupts 复位所有的中断*/
LPC_TMR16B1->MCR = 0x04; /* stop timer on match --达到匹配停止*/
LPC_TMR16B1->TCR = 0x01; /* start timer 启动定时器*/
while (LPC_TMR16B1->TCR & 0x01); /*等待直到时间到*/
LPC_TMR16B1->TCR = 0x00; /* Close timer --关闭定时器*/
}
void Delay_Ms(unsigned int DelayTimes) /** setup timer #1 for delay */
{
//LPC_SYSCON->SYSAHBCLKCTRL |= (1<<8); //开启定时器Timer16_1时钟
LPC_TMR16B1->TCR = 0x02; /* reset timer */
LPC_TMR16B1->PR = 3000; /* set prescaler to zero */
LPC_TMR16B1->MR0 = DelayTimes;
LPC_TMR16B1->IR = 0xff; /* reset all interrrupts */
LPC_TMR16B1->MCR = 0x04; /* stop timer on match */
LPC_TMR16B1->TCR = 0x01; /* start timer */
while (LPC_TMR16B1->TCR & 0x01); /*等待直到时间到*/
LPC_TMR16B1->TCR = 0x00; /* Close timer */
}
void Delay_Sec(unsigned int DelayTimes) /* * setup timer #1 for delay */
{
//LPC_SYSCON->SYSAHBCLKCTRL |= (1<<8); //开启定时器Timer16_1时钟
LPC_TMR16B1->TCR = 0x02; /* reset timer */
LPC_TMR16B1->PR = 3000000; /* set prescaler to zero */
LPC_TMR16B1->MR0 = DelayTimes;
LPC_TMR16B1->IR = 0xff; /* reset all interrrupts */
LPC_TMR16B1->MCR = 0x04; /* stop timer on match */
LPC_TMR16B1->TCR = 0x01; /* start timer */
while (LPC_TMR16B1->TCR & 0x01); /*等待直到时间到*/
LPC_TMR16B1->TCR = 0x00; /* Close timer */
}
Delay.h程序：(延时程序使用Timer16_1实现)
#ifndef __DELAY_H__
#define __DELAY_H__
void Delay_Us(unsigned int DelayTimes); /*微秒延时函数*/
void Delay_Ms(unsigned int DelayTimes); /*毫秒延时函数*/
void Delay_Sec(unsigned int DelayTimes); /*秒延时函数*/
#endif
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