设定

设置通信参数

通过 begin() 函数设定串口通信参数。

port.begin(baud)
port.begin(sets)

"(baudrate)[parity[data bit[stop bit[flow control]]]]"

※ (): 必选, []: 可选

参数 设定范围 说明 基本参数
baudrate 1200 ~ 115200 baudrate(bps) 115200
parity N, E, O, M or S parity bit
(N:None, E:Even, O:Odd, M:Mark,
S:Space)		 N
data bit 8 or 7 data bit 8
stop bit 1 or 2 stop bit 1
flow control T or N TxDE enable (T) / disable (S) T

※ Note : It is recommended that you always set the flow control to T.

示例

#include <PhpocExpansion.h>
#include <Phpoc.h>
#define BUFFER_SIZE 100  // read and write buffer size, reduce it if memory of Arduino is not enough

byte spcId = 1;

ExpansionSerial port(spcId);

byte rwbuf[BUFFER_SIZE];  // read and write buffer

void setup() {
    Serial.begin(9600);
    while(!Serial)
        ;

    Phpoc.begin(PF_LOG_SPI | PF_LOG_NET);
    Expansion.begin();

    // sets the parameters for serial data communication
    port.begin("115200N81T");
}

void loop() {
    int txfree = port.availableForWrite();
    int rxlen = port.available(); 

    if(rxlen > 0) {
        if(rxlen <= txfree) {
            int rwlen; // read and write length

            if(rxlen <= BUFFER_SIZE) 
                rwlen = rxlen;
            else
                rwlen = BUFFER_SIZE;

            // receive data
            rwlen = port.readBytes(rwbuf, rwlen);

            // send data
            port.write(rwbuf, rwlen);

            // print data to serial monitor of Arduino IDE
            Serial.write(rwbuf, rwlen);
        }
    }

    delay(1);
}