Hi all,
I'd like to receive a 6MHz square wave from Rx pin0, and then output it to TX pin1.
The goal is to see the output 6M signal on pin1 and the output 1M signal on pin4 at the same time,
which means the rising edge of the 6M & 1M signal are synchronized.
The following coding seems to have an error on "Serial.read();" part.
Any suggestion is appreciated.
void setup() {
Serial.begin(9600); // initialize serial
USART_MSPIM_Init(); // initialize MSPIM mode
SPCR = (1 << SPE); // enable SPI
TIMSK0 = 0; // disable timer0
}
uint8_t incomingByte = 0;
void loop() {
if (Serial.available() >0){ //take action when a byte is received
incomingByte = Serial.read(); // read the byte
UDR0 = incomingByte;
}
}
void USART_MSPIM_Init()
{
UBRR0H = 0;
UBRR0L = 0;
DDRD |= _BV (4); // XCK as output enables master mode
UCSR0C = (1 << UMSEL01) | (1 << UMSEL00) | (0 << UCPHA0) | (0 << UCPOL0); // Master SPI, mode 0
UCSR0B = (1 << RXEN0) | (1 << TXEN0); // Enable receiver and transmitter
UBRR0L = 7; // 1MHz XCK on pin 4
}
