vitruvius
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Hello,
I am sending some data from one Atmega644P to another Atmega644P consecutively. The first three bytes are SYN(0x16), DLE(0x10), and STX(0x02). On the receiving part, I made a state machine to control if I receive those bytes correctly.
When it is in DLE_1_s state, it goes directly to the "else" statement, even though the data is 0x10. Why is this happening?
I am using Peter Fleury's uart library.
This is the flow chart diagram I am trying to implement:
This is the code:
Thank you.
I am sending some data from one Atmega644P to another Atmega644P consecutively. The first three bytes are SYN(0x16), DLE(0x10), and STX(0x02). On the receiving part, I made a state machine to control if I receive those bytes correctly.
When it is in DLE_1_s state, it goes directly to the "else" statement, even though the data is 0x10. Why is this happening?
I am using Peter Fleury's uart library.
This is the flow chart diagram I am trying to implement:
This is the code:
Code:
int main(void)
{
DDRD = 0b11111010; // PORTD input/output.
DDRC = 0xFF;
uart_init( UART_BAUD_SELECT(UART_BAUD_RATE,F_CPU) );
sei();
unsigned int rec_char;
char buffer[7];
while(1)
{
rec_char=uart_getc();
switch(state)
{
case SYN_s:
{
if ((unsigned char) rec_char == 0x16) // SYN
{
state=DLE_1_s;
}
else
{
state=SYN_s;
}
}
break;
case DLE_1_s:
{
if ((unsigned char) rec_char == 0x10) // DLE
{
state=STX_s;
}
else if ((unsigned char) rec_char == 0x16) // SYN
{
state=DLE_1_s;
}
else
{
state=SYN_s;
}
}
break;
case STX_s:
{
if ((unsigned char) rec_char == 0x02) // STX
{
state=TARGET_NO_1_s;
}
else if ((unsigned char) rec_char == 0x16) // SYN
{
state=DLE_1_s;
}
else
{
state=SYN_s;
}
}
break;Thank you.