lcd16824上制作菜单,并用按键进行选择的代码
时间: 2024-03-14 11:47:50 浏览: 24
好的,以下是一个简单的LCD16824上制作菜单,并用按键进行选择的代码示例。这个示例代码使用了4个按键来选择菜单上不同的功能,最多支持4个功能。
```c
#include <reg52.h>
#define LCD_CS P1_0
#define LCD_CLK P1_1
#define LCD_DATA P1_2
#define KEY1 P2_0
#define KEY2 P2_1
#define KEY3 P2_2
#define KEY4 P2_3
void lcd_send_cmd(unsigned char cmd) {
LCD_CS = 0;
LCD_CLK = 0;
LCD_DATA = cmd;
LCD_CLK = 1;
LCD_CS = 1;
}
void lcd_send_data(unsigned char data) {
LCD_CS = 0;
LCD_CLK = 0;
LCD_DATA = data;
LCD_CLK = 1;
LCD_CS = 1;
}
void lcd_init() {
lcd_send_cmd(0x40); // set start line
lcd_send_cmd(0xB8); // set contrast (adjust as needed)
lcd_send_cmd(0x04); // set bias ratio
lcd_send_cmd(0x10); // set high column address
lcd_send_cmd(0x00); // set low column address
lcd_send_cmd(0x3F); // set display mode
}
void lcd_clear() {
for (unsigned int i = 0; i < 96*64/8; i++) {
lcd_send_data(0x00);
}
}
void lcd_draw_menu(unsigned char selected) {
lcd_clear();
lcd_send_cmd(0x80); // set display start line
lcd_send_cmd(0x40); // set column address
lcd_send_cmd(0xB0); // set page address
for (unsigned char i = 0; i < 4; i++) {
unsigned char data[8] = {0};
if (i == selected) {
data[0] = 0xFF;
data[7] = 0xFF;
}
lcd_send_data(data[0]);
lcd_send_data(data[1]);
lcd_send_data(data[2]);
lcd_send_data(data[3]);
lcd_send_data(data[4]);
lcd_send_data(data[5]);
lcd_send_data(data[6]);
lcd_send_data(data[7]);
}
}
void main() {
lcd_init();
lcd_draw_menu(0);
unsigned char selected = 0;
while (1) {
if (KEY1 == 0) {
selected = 0;
lcd_draw_menu(selected);
// handle key 1 press for menu item 1
}
if (KEY2 == 0) {
selected = 1;
lcd_draw_menu(selected);
// handle key 2 press for menu item 2
}
if (KEY3 == 0) {
selected = 2;
lcd_draw_menu(selected);
// handle key 3 press for menu item 3
}
if (KEY4 == 0) {
selected = 3;
lcd_draw_menu(selected);
// handle key 4 press for menu item 4
}
}
}
```
这段代码中,我们使用`lcd_draw_menu`函数来绘制菜单,并使用`selected`参数指定哪个菜单项被选中。在处理按键时,我们更新`selected`参数,并调用`lcd_draw_menu`函数来更新菜单显示。
请注意,这个示例代码中只实现了最基本的菜单选择功能,您需要根据自己的具体需求进行相应的修改和扩展。另外,这个示例代码中的菜单只有4个项,如果您需要更多的菜单项,需要相应地修改`lcd_draw_menu`函数。