软件iic怎么一直调不出来呢

my_software/iic.c

@@ -29,19 +29,41 @@ void iic_stop()
 
 void iic_ack()
 {
+	iic_scl(0);
+	iic_sda(0);
 	iic_scl(1);
 	iic_scl(0);
 }
-
-void IIC_Write_Byte(unsigned char IIC_Byte){
-	iic_scl(0);
+char iic_wait_ack()
+{
+	int a=3000;
+	iic_scl(1);
+	iic_sda(1);
+	change_io_function(iic_sda_GPIO_Port, iic_sda_Pin,1);
+//	while(read_iic_sda)
+//	{
+//		a--;
+//		if(a==0)
+//		{
+//			iic_stop();
+//			return 1;
+//		}
+//	}
+	HAL_Delay(1);
 	change_io_function(iic_sda_GPIO_Port, iic_sda_Pin,0);
+	return 0;
+}
+
+void IIC_Write_Byte(unsigned char IIC_Byte)
+{
+	iic_scl(0);
 	for(unsigned char i=0;i<8;i++)
 	{
 		if(IIC_Byte & 0x80)
 		{
 			iic_sda(1);
-		}else{
+		}else
+		{
 			iic_sda(0);
 		}
 		IIC_Byte<<=1;
@@ -54,17 +76,20 @@ unsigned char IIC_Read_Byte()
 {
 	unsigned char k=0;
 	iic_scl(0);
+	iic_sda(1);
 	change_io_function(iic_sda_GPIO_Port, iic_sda_Pin,1);
 	for(unsigned char i=0; i<8; i++)
 	{
 		iic_scl(1);
+		k<<=1;
 		if(read_iic_sda==1)
 		{
 			k|=0x01;
 		}
-		k<<=1;
+
 		iic_scl(0);
 	}
+	change_io_function(iic_sda_GPIO_Port, iic_sda_Pin,0);
 	return(k);
 }
 
@@ -73,15 +98,16 @@ void IIC_SAND_DATE(unsigned char DEVICE_ADD,unsigned char IN_DEVICE_ADD,char *DA
 {
 	iic_start();
 	IIC_Write_Byte(DEVICE_ADD);
-	iic_ack();
+	if(iic_wait_ack()){return;}
 	IIC_Write_Byte(IN_DEVICE_ADD);
-	iic_ack();
+	if(iic_wait_ack()){return;}
 	for(int a=0;a<LONG;a++)
 	{
 		IIC_Write_Byte(*DATAS);
 		DATAS++;
+
 	}
-	iic_ack();
+	if(iic_wait_ack()){return;}
 	iic_stop();
 }
 
@@ -89,17 +115,17 @@ void IIC_READ_DATE(unsigned char DEVICE_ADD,unsigned char IN_DEVICE_ADD,char *DA
 {
 	iic_start();
 	IIC_Write_Byte(DEVICE_ADD);
-	iic_ack();
+	if(iic_wait_ack()){return;}
 	IIC_Write_Byte(IN_DEVICE_ADD);
-	iic_ack();
+	if(iic_wait_ack()){return;}
 	iic_start();
-	IIC_Write_Byte(IN_DEVICE_ADD+1);
-	iic_ack();
+	IIC_Write_Byte(DEVICE_ADD+1);
+	if(iic_wait_ack()){return;}
 	for(int a=0;a<LONG;a++)
 	{
 		*DATAS=IIC_Read_Byte();
 		DATAS++;
 	}
-	iic_ack();
+	if(iic_wait_ack()){return;}
 	iic_stop();
 }