PIC18, MPLAB X IDE, XC8, UART, rx_interrupt

PIC18, MPLAB X IDE, XC8, UART, rx_interrupt

echo 버전입니다.

0. 참고 사항

• [  ] https://www.microchip.com/wwwproducts/en/PIC18F4520
• [ datasheet ] http://ww1.microchip.com/downloads/en/devicedoc/39631a.pdf

1. HW 연결

2. 소스 설명

full 소스는 아래 github를 통해 확인하세요.

4MHz, 19200 baudrate

//#pragma config OSC = INTIO67 #pragma config OSC = HS //void __interrupt(high_priority) isr_low (void) void __interrupt(low_priority) isr_low (void) {     if (RCIE && RCIF)                {         TXREG = RCREG;               }  } void init_uart(void) {     TRISC=0X80;       TXSTA = 0x24;         // CSRC TX9 TXEN SYNC SENDB BRGH TRMT TX9D                           // 0    0   1    0    0     1    0    0                           // CSRC: Clock Source Select bit                           // TX9: 9-bit Transmit Enable bit                           // TXEN: Transmit Enable bit                           // SYNC: EUSART Mode Select bit                           // SENDB: Send Break Character bit                           // BRGH: High Baud Rate Select bit                           // TRMT: Transmit Shift Register Status bit                           // TX9D: 9th bit of Transmit Data          RCSTA = 0x90;         // SPEN RX9 SREN CREN ADDEN FERR OERR RX9D                           // 1    0   0    0    0     0    0    0                              // SPEN: Serial Port Enable bit                           // RX9: 9-bit Receive Enable bit                           // SREN: Single Receive Enable bit                           // CREN: Continuous Receive Enable bit                           // ADDEN: Address Detect Enable bit                           // FERR: Framing Error bit                           // OERR: Overrun Error bit                           // RX9D: 9th bit of Received Data          SPBRG = 12;           // 4MHz, 19200          RCIE = 0x01;                      GIE  = 0x01;                         PEIE = 0x01; }

3. 소스

• https://github.com/sglee0223/pic18/tree/master/uart_rx_interrupt.X
  

4. 결과

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