warning C206: 'DELAY_MS': missing function-prototype

ID:1081248 · 发表于 2023-5-31 23:23

提示这个错误怎么办？
#include <reg51.h>

#define DISP_PORT P1    // ???????
#define DISP_DATA P2    // ???????

#define NORTH_GREEN_TIME 54  // ??????
#define NORTH_YELLOW_TIME 3  // ??????
#define NORTH_RED_TIME 40 // ??????
#define EAST_GREEN_TIME 34 // ??????
#define EAST_YELLOW_TIME 3 // ??????
#define EAST_RED_TIME 60    // ??????
#define EMERGENCY_TIME 99 // ??????
sbit NORTH_GREEN_LED = P0^0; // ????
sbit NORTH_YELLOW_LED = P0^1;  // ????
sbit NORTH_RED_LED = P0^2;    // ????
sbit EAST_GREEN_LED = P0^3; // ????
sbit EAST_YELLOW_LED = P0^4; // ????
sbit EAST_RED_LED = P0^5;    // ????
sbit KEY1 = P3^0;             // ??????
sbit KEY2 = P3^1;             // ??????

unsigned char north_time_left = 60;  // ????????
unsigned char east_time_left = 40; // ????????
unsigned char emergency_time_left = EMERGENCY_TIME;  // ????????
unsigned char disp_buf[2]; // ???????,????????

// ???????
void display(unsigned char num)
{
unsigned char i;
DISP_PORT = 0xFE; // ???????
for (i = 0; i < 8; i++) {
      DISP_DATA = num % 10; // ???
      num /= 10;             // ???
      DISP_PORT = DISP_PORT << 1;  // ??
      DELAY_MS(1);          // ??????
}
}

// ????????,?????
void delay_ms(unsigned int ms)
{
unsigned int i, j;
for (i = 0; i < ms; i++) {
      for (j = 0; j < 114; j++) {}  // ??????,??1ms
}
}

// ??????????
void north_green()
{
north_time_left = NORTH_GREEN_TIME;
while (north_time_left > 0) {
      if (north_time_left <= 3) {
         // ??????
         NORTH_GREEN_LED = ~NORTH_GREEN_LED;
         delay_ms(500);
         NORTH_GREEN_LED = 1;
         delay_ms(500);
      } else {
         // ??????
         NORTH_GREEN_LED = 1;
         delay_ms(1000);
      }
      north_time_left--;
}
}

// ??????????
void north_red()
{
north_time_left = NORTH_RED_TIME;
NORTH_GREEN_LED = 0;
NORTH_YELLOW_LED = 0;
NORTH_RED_LED = 1;
delay_ms(NORTH_YELLOW_TIME * 1000);
NORTH_RED_LED = 0;
NORTH_YELLOW_LED = 1;
delay_ms(NORTH_YELLOW_TIME * 1000);
NORTH_YELLOW_LED = 0;
while (north_time_left > 0) {
      NORTH_RED_LED = 1;
      delay_ms(1000);
      north_time_left--;
}
}

// ??????????
void east_green()
{
east_time_left = EAST_GREEN_TIME;
while (east_time_left > 0) {
      if (east_time_left <= 3) {
         // ??????
         EAST_GREEN_LED = ~EAST_GREEN_LED;
         delay_ms(500);
         EAST_GREEN_LED = 1;
         delay_ms(500);
      } else {
         // ??????
         EAST_GREEN_LED = 1;
         delay_ms(1000);
      }
      east_time_left--;
}
}

// ??????????
void east_red()
{
east_time_left = EAST_RED_TIME;
EAST_GREEN_LED = 0;
EAST_YELLOW_LED = 0;
EAST_RED_LED = 1;
delay_ms(EAST_YELLOW_TIME * 1000);
EAST_RED_LED = 0;
EAST_YELLOW_LED = 1;
delay_ms(EAST_YELLOW_TIME * 1000);
EAST_YELLOW_LED = 0;
while (east_time_left > 0) {
      EAST_RED_LED = 1;
      delay_ms(1000);
      east_time_left--;
}
}

// ????????
void emergency()
{
north_time_left = 0;
east_time_left = 0;
emergency_time_left = EMERGENCY_TIME;
display(99);  // ??????"99"
while (emergency_time_left > 0) {
      if (emergency_time_left <= 3) {
         // ??????
         EAST_GREEN_LED = ~EAST_GREEN_LED;
         delay_ms(500);
         EAST_GREEN_LED = 1;
         delay_ms(500);
      } else {
         // ??????
         EAST_GREEN_LED = 1;
         delay_ms(1000);
      }
      emergency_time_left--;
}
EAST_GREEN_LED = 0;
EAST_YELLOW_LED = 0;
EAST_RED_LED = 1;
delay_ms(EAST_YELLOW_TIME * 1000);
EAST_RED_LED = 0;
EAST_YELLOW_LED = 1;
delay_ms(EAST_YELLOW_TIME * 1000);
EAST_YELLOW_LED = 0;
}

int main()
{
while (1) {
      // ??????
      north_green();
      north_red();

      // ??????
      east_red();
      east_green();

      // ??????
      if (KEY1 == 0) {
         emergency();
      }
      if (KEY2 == 0) {
         north_time_left = 60;
         east_time_left = 40;
      }

      // ??????
      disp_buf[0] = north_time_left / 10;
      disp_buf[1] = north_time_left % 10;
      display(disp_buf[0] * 10 + disp_buf[1]);  // ????????
      delay_ms(1000);

      disp_buf[0] = east_time_left / 10;
      disp_buf[1] = east_time_left % 10;
      display(disp_buf[0] * 10 + disp_buf[1]);  // ????????
      delay_ms(1000);
}
return 0;
}

ID:213173 · 发表于 2023-6-1 05:52

DELAY_MS函数名大小写不一致，void delay_ms函数要放在void display函数上面。

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