试题
![](https://img2020.cnblogs.com/blog/2413946/202111/2413946-20211110152543882-911280433.png)
代码部分
#include <ioCC2530.h>
typedef unsigned int uint16;
typedef unsigned char uint8;
uint8 ledLightIndex;
uint8 ledRegister[4] = {0x06, 0x05, 0x14,0xC};
uint8 running;
uint16 checkKeyICycle = 2000;
void Init_Port()
{
P1SEL &= ~0xFF;
P1DIR |= 0xFF;
P1DIR &= ~0x04;
P1 = 0x04;
}
void DelayMs(uint16 ms)
{
for(uint16 i = 0; i < ms; i++)
for(uint16 j = 0; j < 535; j++);
}
void main(void)
{
Init_Port();
while(1)
{
for(uint16 i = 0; i < checkKeyICycle; i++)
{
DelayMs(1);
if(P1_2 == 0)
{
DelayMs(10);
if(P1_2 == 0)
{
running = running == 1 ? 0 : 1;
while(P1_2 == 0);
}
}
}
if (running == 1)
{
P1 = ledRegister[ledLightIndex];
if(ledLightIndex == 2) P1_7 = P1_7 == 1 ? 0 : 1;
if(ledLightIndex == 3) ledLightIndex = 0;
else ++ledLightIndex;
}
else P1 = 0x04;
}
}
演示
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