我有嵌入式系统项目,汽车监控系统,我们在 microC 程序上使用 c 语言。
我决定写一部分然后测试它我的想法是当我按下并释放(开关0)时,汽车会工作并且“电源”会出现在液晶屏上,然后我必须按下开关1来系好安全带。
如果 switch1=1 那么它将显示“BF”,否则它将显示“BO”。当我们进入switch0时,它会消失POWER AND BO,因为我们没有按下switch1。但是,即使我按下 switch1 也不会出现 BF,除非我同时按下 switch0 和 switch1 !
这是我的代码:
sbit LCD_RS at RA1_bit;
sbit LCD_RW at RA2_bit;
sbit LCD_EN at RA3_bit;
sbit LCD_D4 at RD4_bit;
sbit LCD_D5 at RD5_bit;
sbit LCD_D6 at RD6_bit;
sbit LCD_D7 at RD7_bit;
sbit LCD_RS_Direction at TRISA1_bit;
sbit LCD_RW_Direction at TRISA2_bit;
sbit LCD_EN_Direction at TRISA3_bit;
sbit LCD_D4_Direction at TRISD4_bit;
sbit LCD_D5_Direction at TRISD5_bit;
sbit LCD_D6_Direction at TRISD6_bit;
sbit LCD_D7_Direction at TRISD7_bit;
sbit LED0 at RC0_bit;
sbit LED1 at RC1_bit;
sbit Switch0 at RB0_bit;
sbit Switch1 at RB1_bit;
sbit Switch2 at RB2_bit;
sbit Switch3 at RB3_bit;
int Num;
void main() {
ADCON1 = 0X07; //a port as ordinary i/o.
TRISA = 0X00; //a port as output.
TRISD = 0X00; //d port as output.
TRISC = 0X00;
TRISB = 0X0F;
PORTC = 0b00000001;
Lcd_Init(); // Initialize LCD
Delay_ms(200);
Lcd_Cmd(_LCD_CLEAR); // Clear display
Lcd_Cmd(_LCD_CURSOR_OFF);
LED0 = 0;
LED1= 0;
do {
if (Switch0) // if switch (RB1) is pressed
{
Delay_ms(20); // pause 20 mS
while(Switch0); // Wait for release of the button
Delay_ms(10);
Lcd_Out(1, 7, "power");
if (Switch1)
{
Delay_ms(10); // pause 20 mS
while (Switch1); // Wait for release of the butto
Delay_ms(10);
Lcd_Out(2, 6, "BF");
LED0 = 0;
}
else
{
Delay_ms(20);
Lcd_Cmd(_LCD_CLEAR);
Lcd_Out(2,1,"BO");
LED0 = ~LED0;
}
}
} while(1);
}