测试IO高低电平是遇到的问题（调试工装遇到的问题）

#define RELAY1_CHK_PORT  GPIOD
#define RELAY1_CHK_PIN  GPIO_Pin_6
#define RELAY2_CHK_PORT  GPIOD
#define RELAY2_CHK_PIN  GPIO_Pin_7
#define RELAY3_CHK_PORT  GPIOG
#define RELAY3_CHK_PIN  GPIO_Pin_9
#define RELAY4_CHK_PORT  GPIOG
#define RELAY4_CHK_PIN  GPIO_Pin_10

#define is_relay_on(PORT,PIN) GPIO_ReadInputDataBit(PORT,PIN)

ret2 = GPIO_ReadInputDataBit(RELAY2_CHK_PORT, RELAY2_CHK_PIN);
if(ret2 == 0x01)
{
return STATE_NEXT;
}
else
{
return STATE_WAIT;
}