Created
April 12, 2017 18:43
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sample sketch for review
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/* Sample sketch for review. | |
*/ | |
#define USB Serial | |
const int usbBaud = 57600; | |
const int ledPin = 13; | |
const int commandBufferLength = 80; | |
static char commandBuffer[commandBufferLength]; | |
char *commandMode; | |
char *commandValue; | |
int commandBufferPosition = 0; | |
int readline(int incomingChar, char *buffer, int len, int &bufferPosition) { | |
int totalLength; | |
if (incomingChar > 0) { | |
switch (incomingChar) { | |
case '\n': | |
break; | |
case '\r': | |
totalLength = bufferPosition; | |
bufferPosition = 0; | |
return totalLength; | |
default: | |
if (bufferPosition < len-1) { | |
buffer[bufferPosition] = incomingChar; | |
buffer[bufferPosition+1] = 0; | |
bufferPosition++; | |
} | |
} | |
} | |
return -1; | |
} | |
void setup() { | |
pinMode(ledPin, OUTPUT); | |
USB.begin(usbBaud); | |
} | |
void loop() { | |
if (readline(USB.read(), commandBuffer, commandBufferLength, commandBufferPosition) > 0) { | |
commandMode = strtok(commandBuffer, " "); | |
if (strcmp(commandMode, "led") == 0) { | |
commandValue = strtok(NULL, " "); | |
if (strcmp(commandValue, "on") == 0) { | |
digitalWrite(ledPin, HIGH); | |
} else if (strcmp(commandValue, "off") == 0) { | |
digitalWrite(ledPin, LOW); | |
} else { | |
USB.println("value not understood"); | |
} | |
} else { | |
USB.print("error: could not parse command '"); | |
USB.print(commandBuffer); | |
USB.println("'"); | |
} | |
} | |
} |
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