I have tried 51 serial port simulation on Proteus before but failed. Yesterday, I tried atmega16 serial port simulation again and succeeded. Of course, simulation is the simplest. When doing things, you need to add max232 chip, but it is not needed for simulation.
Program function: The serial port assistant sends a set of data "I LOVE YOU-----SBILY1988" to the microcontroller, and the microcontroller sends the data back to the serial port assistant after receiving it.
Data transmission direction: computer -> single-chip microcomputer; single-chip microcomputer -> computer;
Now send the simulation diagram and program:
#include
#include
void init();
void send(unsigned char);
unsigned char receive();
void main()
{unsigned char i=0,a=300;
init();
while(1)
{
i=receive();
send(i);
}
}
void init() //initialization function
{
UCSRB=BIT(4)|BIT(3); //Enable send and receiver
UCSRC=BIT(7)|(3<<1); //Set data frame format (8 data bits)
UBRRH=0; //Set the baud rate to 9600bps under 8MHZ crystal oscillator
UBRRL=51;
}
void send(unsigned char data) //data sending
{
while(!(UCSRA&BIT(5))); //Wait for the send buffer to be ready
UDR=data;
while(!(UCSRA&BIT(6))); //Wait for sending to finish
UCSRA&=BIT(6);
}
unsigned char receive() //data receiving
{unsigned char data=0;
while(!(UCSRA&BIT(7))); //Wait for data to be received
data=UDR;
return data;
}
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