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This function can be used to read serial string that is passed to an arduino. In our project, we used a Raspberry Pi with a camera and performed some image processing on the captured images and passed the image information to the arduino to steer a car. This script was part of our project to create an autonomous driving car which can follow a li…
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/** | |
Script Name: read-serial-string-with-arduino.c | |
Author: Stefan Herdy | |
Date: 23.10.2019 | |
Description: | |
This function can be used to read serial string that is passed to an arduino. | |
In our project, we used a Raspberry Pi with a camera and performed some image processing on the captured images and passed the image information to the arduino to steer a car. | |
This script was part of our project to create an autonomous driving car which can follow a line with a certain color. | |
Usage: | |
- Use this function as part of your ino-file in your next Arduino-project. | |
**/ | |
//Variables for the serial protocol | |
const byte numChars = 32; | |
char receivedChars[numChars]; | |
boolean newData = false; | |
Serial.begin(115200); | |
void serialProtocol() | |
{ | |
static boolean recvInProgress = false; | |
static byte ndx = 0; | |
char startMarker = '<'; | |
char endMarker = '>'; | |
char rc; | |
while (Serial.available() > 0 && newData == false) | |
{ | |
rc = Serial.read(); | |
if (recvInProgress == true) | |
{ | |
if (rc != endMarker) | |
{ | |
receivedChars[ndx] = rc; | |
ndx++; | |
if (ndx >= numChars) | |
{ | |
ndx = numChars - 1; | |
} | |
} | |
else | |
{ | |
receivedChars[ndx] = '\0'; // terminate the string | |
recvInProgress = false; | |
ndx = 0; | |
newData = true; | |
} | |
} | |
else if (rc == startMarker) | |
{ | |
recvInProgress = true; | |
} | |
} | |
} |
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