UART寄存器未调试到终端

这是两个atmega328p控制器之间的UART传输。 我试图通过从接收控制器上的数据结构中打印变量来确认数据是否正确传递。

我的终端没有显示任何信息。 我只能确认从我的LED调用到达代码，我启用了portB。

我很确定我的BAUD率是正确的（51为8mhz）。 同时确信硬件正确连接。 有关如何进一步调试以找到问题的任何建议？ 我是AVR开发的新手，所以也许对其他人来说很明显。

传递

#include  #include  typedef struct { uint8_t data; uint8_t timestamp; } tData; //Waits until bits are set to grab data char readChar() { while (! (UCSR0A & (1 << RXC0)) ); return UDR0; } //Waits until buffer is empty void writeChar(char data) { while(!(UCSR0A & (1<<UDRE0))); UDR0 = data; } int main(void) { DDRD |= 1 << PIND1; //pin1 of portD as OUTPUT DDRD &= ~(1 << PIND0); //pin0 of portD as INPUT PORTD |= 1 <> 8); //Put the upper part of the baud number here (bits 8 to 11) UBRR0L = (unsigned char) UBBRValue; //Put the remaining part of the baud number here UCSR0B = (1 << RXEN0) | (1 << TXEN0); //Enable the receiver and transmitter UCSR0C = (1 << USBS0) | (3 << UCSZ00); //Set 2 stop bits and data bit length is 8-bit tData payload; // Instance struct payload.data = 2; // Store some data unsigned char * payloadPtr; payloadPtr = &payload; // Pointer to struct memory location while (1) { while (! (UCSR0A & (1 << UDRE0)) ); { for (int n=0;n<sizeof(payload);n++) // Send bytes contained in struct { writeChar(payloadPtr[n]); PORTB = 0xFF; } } _delay_ms(1000); PORTB = 0x00; _delay_ms(1000); } } 

接收

 #include  #include  typedef struct { uint8_t data; uint8_t timestamp; } tData; //Waits until bits are set to grab data char readChar() { while (! (UCSR0A & (1 << RXC0)) ); return UDR0; } //Waits until buffer is empty void writeChar(char data) { while(!(UCSR0A & (1<<UDRE0))); UDR0 = data; } int main(void) { DDRD |= (1 <> 8); UBRR0L = (unsigned char) UBRR_Value; UCSR0B = (1 << RXEN0) | (1 << TXEN0); UCSR0C = (1 << USBS0) | (3 << UCSZ00); tData payload; // Instance struct unsigned char * payloadPtr; payloadPtr = &payload; // Pointer to struct memory location while (1) { for (int n=0;n<sizeof(payload);n++) // Commit recieved bytes to struct { payloadPtr[n] = readChar(); } writeChar(payload.data); //writeChar(2); //test PORTB = 0xFF; _delay_ms(1000); PORTB = 0x00; _delay_ms(1000); } }