0014-cserial-port.org

cserial-port

This library allows you to work with the serial port. It uses cffi to make system calls and should work on Linux, OSX and Windows.

To test it, I wrote this small program for my Arduino UNO:

#include <LiquidCrystal.h>

LiquidCrystal lcd(13, 12, 11, 10, 9, 8);

void setup() {
  lcd.begin(16, 2);
  Serial.begin(9600);
}

String msg;
int char_pos = 0;
int row = 0;

void loop () {
  if (Serial.available()) {
    char ch = Serial.read();
    
    if (ch == '\n') {
      char_pos = 0;
    } else {
      if (char_pos == 0) {
          lcd.setCursor(0, 1);
          lcd.print("                ");
      }
      lcd.setCursor(char_pos, row);
      lcd.print(ch);
      char_pos++;
    }
  }
}

Now, let’s send some data to our microcomputer to show the string on the attached LCD:

CL-USER> (cserial-port:with-serial (port "/dev/cu.usbmodem14101")
           (cserial-port:write-serial-string
             "Hello Lisp World!"
             port))

And here is the result!