LPC1788驱动LCD1602的程序，写得不好，还请大家指点
前段时间练手留下的程序，整理好了放上来，当作备份吧。大家发现有什么缺点还请指点一二。LCD1602.H#ifndef __LCD1602_H
#define __LCD1602_H
#include "stdint.h"
/****************************************************************************/
/*Display On/Off Control */
/****************************************************************************/
/*Turn on display*/
#define DISPLAYON 0X0C
/*Turn off display */
#define DISPLAYOFF 0X08
/*Turn on cursor */
#define DISPCURSORON 0X0A
/*Turn off cursor*/
#define DISPCURSOROFF 0X08
/*Cursor blinking*/
#define CURSORBLINKYON 0X09
/*Cursor not blinking*/
#define CURSORBLINKYOFF 0X08
/****************************************************************************/
/*Entry Mode Set */
/****************************************************************************/
/*Cursor move direction : Increment*/
#define CURSORADD 0X06
/*Cursor move direction : Decrement*/
#define CURSORCUT 0X04
/*Display shift when write or read */
#define SCREENSCROLLMOVE 0X05
/*Display hold when write or read */
#define SCREENSCROLLHOLD 0X04
/****************************************************************************/
/*Cursor or Display Shift */
/*Moves cursor and shifts display without changing DDRAM contents. */
/****************************************************************************/
/*Cursor shift */
#define CURSORSHIFT 0X10
/*Display shift */
#define SCREENSHIFT 0X18
/*Shift to the left */
#define SHIFTLEFT 0X10
/*Shift to the right*/
#define SHIFTRIGHT 0X14
/*The LCD1602 API*/
void LCD1602_GPIO_Init(void);
void LCD1602_Init(void);
void LCD1602_SetCousor(uint8_t x, uint8_t y);
void LCD1602_DisplayString(const uint8_t *str);
void LCD1602_DisplayNum(uint32_t n);
void LCD1602_DisplayClear(void);
void LCD1602_DisplayHome(void);
void LCD1602_DisplayOn(void);
void LCD1602_DisplayOff(void);
void LCD1602_CursorOn(uint8_t blink);
void LCD1602_CursorOff(void);
void LCD1602_CursorMoveLeft(uint8_t n);
void LCD1602_CursorMoveRight(uint8_t n);
void LCD1602_DisplayShiftLeft(uint8_t n);
void LCD1602_DisplayShiftRight(uint8_t n);
/*If the LCD API can not meet your need, you can use the API below operated*/
/*on the lowlayer. */
uint8_t LCD1602_ReadState(void);
uint8_t LCD1602_CheckBusy(void);
uint8_t LCD1602_ReadData(void);
void LCD1602_WriteData(uint8_t Data);
void LCD1602_WriteCommand(uint8_t Command);
#endif
LCD1602.C#include "lpc177x_8x_gpio.h"
#include "lcd1602.h"
/* LCD1602 pin preset */
#define BRD_LCD1602_RS_PORT (4)
#define BRD_LCD1602_RS_PIN (0)
#define BRD_LCD1602_RS_MASK (1 << BRD_LCD1602_RS_PIN)
#define BRD_LCD1602_RW_PORT (4)
#define BRD_LCD1602_RW_PIN (1)
#define BRD_LCD1602_RW_MASK (1 << BRD_LCD1602_RW_PIN)
#define BRD_LCD1602_E_PORT (4)
#define BRD_LCD1602_E_PIN (2)
#define BRD_LCD1602_E_MASK (1 << BRD_LCD1602_E_PIN)
#define BRD_LCD1602_DATA_PORT (4)
#define BRD_LCD1602_DATA_BYTE (1)
/*********************************************************************//**
* @brief Initialize the pins that LCD1602 use
* @param None
* @return None
**********************************************************************/
void LCD1602_GPIO_Init(void)
{
FIO_SetDir(BRD_LCD1602_RS_PORT, BRD_LCD1602_RS_MASK, GPIO_DIRECTION_OUTPUT);
FIO_SetDir(BRD_LCD1602_RW_PORT, BRD_LCD1602_RW_MASK, GPIO_DIRECTION_OUTPUT);
FIO_SetDir(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK, GPIO_DIRECTION_OUTPUT);
FIO_ByteSetDir(BRD_LCD1602_DATA_PORT, BRD_LCD1602_DATA_BYTE, 0xFF, GPIO_DIRECTION_OUTPUT);
FIO_SetMask(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK, 0);
FIO_ClearValue(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK);
}
/*********************************************************************//**
* @brief Delay function
* @param tick - number milisecond of delay time
* @return None
**********************************************************************/
static void LCD1602_DelayMs(uint8_t tick)
{
uint8_t i;
uint16_t j;
for (i=tick; i>0; i--)
for (j=0; j<10000; j++);
}
/*********************************************************************//**
* @brief Read the state from LCD1602
* @param None
* @return the current state of LCD1602
**********************************************************************/
uint8_t LCD1602_ReadState(void)
{
uint8_t state = 0;
FIO_ByteSetDir(BRD_LCD1602_DATA_PORT, BRD_LCD1602_DATA_BYTE, 0xFF, GPIO_DIRECTION_INPUT);
FIO_SetMask(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK, 0);
FIO_ClearValue(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK);
/*RS: L,RW: H,E: H*/
FIO_SetMask(BRD_LCD1602_RS_PORT, BRD_LCD1602_RS_MASK, 0);
FIO_ClearValue(BRD_LCD1602_RS_PORT, BRD_LCD1602_RS_MASK);
FIO_SetMask(BRD_LCD1602_RW_PORT, BRD_LCD1602_RW_MASK, 0);
FIO_SetValue(BRD_LCD1602_RW_PORT, BRD_LCD1602_RW_MASK);
FIO_SetMask(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK, 0);
FIO_SetValue(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK);
FIO_ByteSetMask(BRD_LCD1602_DATA_PORT, BRD_LCD1602_DATA_BYTE, 0xFF, 0);
state = FIO_ByteReadValue(BRD_LCD1602_DATA_PORT, BRD_LCD1602_DATA_BYTE);
FIO_SetMask(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK, 0);
FIO_ClearValue(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK);
FIO_ByteSetDir(BRD_LCD1602_DATA_PORT, BRD_LCD1602_DATA_BYTE, 0xFF, GPIO_DIRECTION_OUTPUT);
return (state);
}
/*********************************************************************//**
* @brief Read data from LCD1602
* @param None
* @return the data of LCD1602
**********************************************************************/
uint8_t LCD1602_ReadData(void)
{
uint8_t data = 0;
FIO_ByteSetDir(BRD_LCD1602_DATA_PORT, BRD_LCD1602_DATA_BYTE, 0xFF, GPIO_DIRECTION_INPUT);
/* RS: H,RW: H,E: H */
FIO_SetMask(BRD_LCD1602_RS_PORT, BRD_LCD1602_RS_MASK, 0);
FIO_SetValue(BRD_LCD1602_RS_PORT, BRD_LCD1602_RS_MASK);
FIO_SetMask(BRD_LCD1602_RW_PORT, BRD_LCD1602_RW_MASK, 0);
FIO_SetValue(BRD_LCD1602_RW_PORT, BRD_LCD1602_RW_MASK);
FIO_SetMask(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK, 0);
FIO_SetValue(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK);
FIO_ByteSetMask(BRD_LCD1602_DATA_PORT, BRD_LCD1602_DATA_BYTE, 0xFF, 0);
data = FIO_ByteReadValue(BRD_LCD1602_DATA_PORT, BRD_LCD1602_DATA_BYTE);
FIO_SetMask(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK, 0);
FIO_ClearValue(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK);
FIO_ByteSetDir(BRD_LCD1602_DATA_PORT, BRD_LCD1602_DATA_BYTE, 0xFF, GPIO_DIRECTION_OUTPUT);
return (data);
}
/*********************************************************************//**
* @brief Determine LCD1602 is busy or not
* @param None
* @return the busy flag of LCD1602
**********************************************************************/
uint8_t LCD1602_CheckBusy(void)
{
return (LCD1602_ReadState() & 0x80);
}
/*********************************************************************//**
* @brief Write data into LCD1602
* @param Data which will write into LCD1602
* @return None
**********************************************************************/
void LCD1602_WriteData(uint8_t Data)
{
/* RS: H,RW: L,E: hight pluse*/
FIO_SetMask(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK, 0);
FIO_ClearValue(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK);
FIO_SetMask(BRD_LCD1602_RS_PORT, BRD_LCD1602_RS_MASK, 0);
FIO_SetValue(BRD_LCD1602_RS_PORT, BRD_LCD1602_RS_MASK);
FIO_SetMask(BRD_LCD1602_RW_PORT, BRD_LCD1602_RW_MASK, 0);
FIO_ClearValue(BRD_LCD1602_RW_PORT, BRD_LCD1602_RW_MASK);
FIO_ByteSetMask(BRD_LCD1602_DATA_PORT, BRD_LCD1602_DATA_BYTE, 0xFF, 0);
FIO_ByteClearValue(BRD_LCD1602_DATA_PORT, BRD_LCD1602_DATA_BYTE, 0xFF);
FIO_ByteSetMask(BRD_LCD1602_DATA_PORT, BRD_LCD1602_DATA_BYTE, 0xFF, 0);
FIO_ByteSetValue(BRD_LCD1602_DATA_PORT, BRD_LCD1602_DATA_BYTE, Data);
FIO_SetMask(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK, 0);
FIO_SetValue(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK);
FIO_SetMask(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK, 0);
FIO_ClearValue(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK);
}
/*********************************************************************//**
* @brief Write command into LCD1602
* @param Command which will write into LCD1602
* @return None
**********************************************************************/
void LCD1602_WriteCommand(uint8_t Command)
{
/* RS: L,RW: L,E: hight pluse*/
FIO_SetMask(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK, 0);
FIO_ClearValue(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK);
FIO_SetMask(BRD_LCD1602_RS_PORT, BRD_LCD1602_RS_MASK, 0);
FIO_ClearValue(BRD_LCD1602_RS_PORT, BRD_LCD1602_RS_MASK);
FIO_SetMask(BRD_LCD1602_RW_PORT, BRD_LCD1602_RW_MASK, 0);
FIO_ClearValue(BRD_LCD1602_RW_PORT, BRD_LCD1602_RW_MASK);
FIO_ByteSetMask(BRD_LCD1602_DATA_PORT, BRD_LCD1602_DATA_BYTE, 0xFF, 0);
FIO_ByteClearValue(BRD_LCD1602_DATA_PORT, BRD_LCD1602_DATA_BYTE, 0xFF);
FIO_ByteSetMask(BRD_LCD1602_DATA_PORT, BRD_LCD1602_DATA_BYTE, 0xFF, 0);
FIO_ByteSetValue(BRD_LCD1602_DATA_PORT, BRD_LCD1602_DATA_BYTE, Command);
FIO_SetMask(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK, 0);
FIO_SetValue(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK);
FIO_SetMask(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK, 0);
FIO_ClearValue(BRD_LCD1602_E_PORT, BRD_LCD1602_E_MASK);
}
/*********************************************************************//**
* @brief Reset LCD1602
* @param None
* @return None
**********************************************************************/
void LCD1602_Init(void)
{
LCD1602_DelayMs(15);
LCD1602_WriteCommand(0X38);
LCD1602_DelayMs(5);
LCD1602_WriteCommand(0X38);
LCD1602_DelayMs(5);
LCD1602_WriteCommand(0X38);
while (LCD1602_CheckBusy());
LCD1602_WriteCommand(0X38);
while (LCD1602_CheckBusy());
LCD1602_WriteCommand(0X08);
while (LCD1602_CheckBusy());
LCD1602_WriteCommand(0X01);
while (LCD1602_CheckBusy());
LCD1602_WriteCommand(0X06);
while (LCD1602_CheckBusy());
LCD1602_WriteCommand(0X0C);
}
/*********************************************************************//**
* @brief Set coordinate of cursor
* @param x - x-axis,y - y-axis
* @return None
**********************************************************************/
void LCD1602_SetCousor(uint8_t x, uint8_t y)
{
if ((0 == y) && (x < 40))
{
while (LCD1602_CheckBusy());
LCD1602_WriteCommand(0x80 | x);
}
else if ((1 == y) && (x < 40))
{
while (LCD1602_CheckBusy());
LCD1602_WriteCommand(0xC0 | x);
}
}
/*********************************************************************//**
* @brief Print one string on LCD1602
* @param *strpiont to which will print
* @return None
**********************************************************************/
void LCD1602_DisplayString(const uint8_t *str)
{
uint8_t i = 0;
if (0 == str) return;
while ((i < 40) && (str != 0))
{
while (LCD1602_CheckBusy());
LCD1602_WriteData(str);
i++;
}
}
/*********************************************************************//**
* @brief Print a number on LCD1602
* @param nthe number which will print
* @return None
**********************************************************************/
void LCD1602_DisplayNum(uint32_t n)
{
uint8_t pcBuf, *p;
if (0 == n)
{
while (LCD1602_CheckBusy());
LCD1602_WriteData('0');
}
else
{
p = pcBuf;
while (n != 0)
{
*p++ = (n % 10) + '0';
n /= 10;
}
}
while (p > pcBuf)
{
while (LCD1602_CheckBusy());
LCD1602_WriteData(*--p);
}
}
/*********************************************************************//**
* @brief Clear the screen
* @param None
* @return None
**********************************************************************/
void LCD1602_DisplayClear(void)
{
while (LCD1602_CheckBusy());
LCD1602_WriteCommand(0x01);
}
/*********************************************************************//**
* @brief Set cursor return (0,0)
* @param None
* @return None
**********************************************************************/
void LCD1602_DisplayHome(void)
{
while (LCD1602_CheckBusy());
LCD1602_WriteCommand(0x02);
}
/*********************************************************************//**
* @brief Turn on LCD1602
* @param None
* @return None
**********************************************************************/
void LCD1602_DisplayOn(void)
{
while (LCD1602_CheckBusy());
LCD1602_WriteCommand(DISPLAYON);
}
/*********************************************************************//**
* @brief Turn off LCD1602
* @param None
* @return None
**********************************************************************/
void LCD1602_DisplayOff(void)
{
while (LCD1602_CheckBusy());
LCD1602_WriteCommand(DISPLAYOFF);
}
/*********************************************************************//**
* @brief Move the cursor n unit to the left.
* @param n is the unit number to move.
* @return None
**********************************************************************/
void LCD1602_CursorMoveLeft(uint8_t n)
{
while (n--)
{
while (LCD1602_CheckBusy());
LCD1602_WriteCommand(CURSORSHIFT | SHIFTLEFT);
}
}
/*********************************************************************//**
* @brief Move the cursor n unit to the right.
* @param n is the unit number to move.
* @return None
**********************************************************************/
void LCD1602_CursorMoveRight(uint8_t n)
{
while (n--)
{
while (LCD1602_CheckBusy());
LCD1602_WriteCommand(CURSORSHIFT | SHIFTRIGHT);
}
}
/*********************************************************************//**
* @brief Shift the entire displayn unit to the left.
* @param n is the unit number to shift.
* @return None
**********************************************************************/
void LCD1602_DisplayShiftLeft(uint8_t n)
{
while (n--)
{
while (LCD1602_CheckBusy());
LCD1602_WriteCommand(SCREENSHIFT | SHIFTLEFT);
}
}
/*********************************************************************//**
* @brief Shift the entire displayn unit to the right.
* @param n is the unit number to shift.
* @return None
**********************************************************************/
void LCD1602_DisplayShiftRight(uint8_t n)
{
while (n--)
{
while (LCD1602_CheckBusy());
LCD1602_WriteCommand(SCREENSHIFT | SHIFTRIGHT);
}
}
/*********************************************************************//**
* @brief Sets cursor on.
* @param blink determines the cursor style.
- DISPCURSORON:Turn on cursor
- DISPCURSOROFF: Turn off cursor
* @return None
**********************************************************************/
void LCD1602_CursorOn(uint8_t blink)
{
while (LCD1602_CheckBusy());
LCD1602_WriteCommand(DISPLAYON | DISPCURSORON | blink);
}
/*********************************************************************//**
* @brief Sets cursor off.
* @param None
* @return None
**********************************************************************/
void LCD1602_CursorOff(void)
{
while (LCD1602_CheckBusy());
LCD1602_WriteCommand(DISPLAYON | DISPCURSOROFF);
}
工程文件：
看起来不错。
为啥不用寄存器操作？GPIO库绕。
大材小用。
上4"以上的大屏。
哈哈，用了1788这么大个片子，用了1602的小液晶。 lcofjp 发表于 2013-6-9 22:06 static/image/common/back.gif
哈哈，用了1788这么大个片子，用了1602的小液晶。
本来是用TFT屏的，但是主管说练手就不要弄那么复杂了 mark....
顶一个....{:lol:} 亲用的是库函数啊？可以 共享么？我初学，求赐教
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