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KeyPad.c
195 lines (167 loc) · 3.82 KB
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KeyPad.c
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#include "keypad.h"
void KP_Init()
{
CHIP_Init();
PORTC &= 0x3F;
DDRC |= 0xC0;
PORTB = 0xFF;
DDRB = 0x00;
}
uint8_t KP_read()
{
asm("nop");
uint8_t retb = PINB;
return retb;
}
uint8_t KP_scan()
{
uint8_t code = MASK;
uint8_t key = 0x00;
PORTB = 0xFF;//再初始化键盘扫描
DDRB = 0x00;
//scan the first line
LINE1_SCAN();
LINE1_SCAN();
code = KP_read();
if(code != MASK) {
_delay_ms(10);
code = KP_read();
if(code != MASK) {
switch(code) {
case 0xFE: key = 0; break;
case 0xFD: key = 1; break;
case 0xFB: key = 2; break;
case 0xF7: key = 3; break;
case 0xEF: key = 4; break;
case 0xDF: key = 5; break;
case 0xBF: key = 6; break;
case 0x7F: key = 7; break;
}
}
/*
while(1) {
code = KP_read();
if(code == MASK) {
_delay_ms(10);
code = KP_read();
if(code == MASK);
break;
}
}
*/
}
//scan the second line
LINE2_SCAN();
LINE2_SCAN();
code = KP_read();
if(code != MASK) {
_delay_ms(10);
code = KP_read();
if(code != MASK) {
switch(code) {
case 0xFE: key = 8; break;
case 0xFD: key = 9; break;
case 0xFB: key = 10; break;
case 0xF7: key = 11; break;
case 0xEF: key = 12; break;
case 0xDF: key = 13; break;
case 0xBF: key = 14; break;
case 0x7F: key = 15; break;
}
}
/*
while(1) {
code = KP_read();
if(code == MASK) {
_delay_ms(10);
code = KP_read();
if(code == MASK);
break;
}
}
*/
}
//if no key is pressed, return 0x00
return key;
}
int main1()
{
uint8_t keysc;
KP_Init();
//UART_Init();
LCD12864PortInit(); //端口初始化
LCD12864Init(); //LCD初始化
//printf("Press a Key:\n");
unsigned char ucString[]=" 你按下了按键";
PORTB = 0xFF;
DDRB = 0x00;//初始化键盘扫描
while(1) {
keysc = KP_scan();
if(keysc != 0){
PORTB = 0x00;
DDRB = 0xFF; //初始化LCD显示
LCD12864WriteCommand(0x90);
for(int i=0;i<14;i++)
LCD12864WriteData(ucString[i]);
LCD12864WriteData(keysc);
PORTB = 0xFF;//再初始化键盘扫描
DDRB = 0x00;
}
//printf("You pressed key: %c\n", keysc);
}
}
void LCD12864PortInit()
{
//LCD数据端口设置
PORTB = 0x00; //
DDRB = 0xFF; //配置端口PB全部为输出口
PORTD = 0x00;
DDRD |= (1 << RS) | (1 << RW) | (1 << E);
_delay_ms(15);
}
void LCD12864Init()
{
LCD12864WriteCommand(0x01); //清屏
_delay_ms(15);
LCD12864WriteCommand(0x38); //显示模式
_delay_ms(5);
LCD12864WriteCommand(0x0f); //显示开关控制,开显示,光标显示,光标闪烁
LCD12864WriteCommand(0x0c); //显示开关控制,开显示,光标不显示,光标不闪烁
_delay_ms(5);
LCD12864WriteCommand(0x06); //光标设置,读或写一个字符后,地址指针加一,光标加一,整屏不移动
_delay_ms(5);
}
void LCD12864WriteCommand(unsigned char ucCommand)
{
LCD12864BusyCheck();
PORTD &= ~(1 << RS); //RS=0,写命令
PORTD &= ~(1 << RW); //RW=0,写指令
PORTD |= (1 << E); //E=1,写操作
_delay_ms(2);
PORTB = ucCommand; //指令送数据端口
PORTD &= ~(1 << E); //E=0,停止写操作
_delay_ms(5);
}
void LCD12864WriteData(unsigned char ucData)
{
LCD12864BusyCheck();
PORTD |= (1 << RS); //RS=1,写数据
PORTD &= ~(1 << RW); //RW=0,写指令
PORTD |= (1 << E); //E=1,写操作
_delay_ms(2);
PORTB = ucData; // 数据送数据端口
PORTD &= ~(1 << E); //E=0,停止写操作
_delay_ms(5);
}
void LCD12864BusyCheck(void)
{
unsigned int uiTemp;
uiTemp = 3000;
DDRB = 0x00; //PB口置为输入口,准备读取数据
PORTD &= ~(1 << RS); //RS=0,读命令
PORTD |= (1 << RW); //RW=1,读指令
PORTD |= (1 << E); //E=1,使能
while((0x80 & PINB) && (uiTemp--)); //监测忙信号,直到忙信号为0,才能进行读写操作
PORTD &= ~(1 << E); //E=0
DDRB = 0xFF; //PA口置为输出口,准备向端口发送数据
}