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authorBlaise Thompson <blaise@untzag.com>2021-04-24 17:21:37 -0500
committerBlaise Thompson <blaise@untzag.com>2021-04-24 17:21:37 -0500
commitbf5893688496e2ae85808303e425c439f06c7efc (patch)
treeff4b106276983321d63d43826ee8b22122f8a7db /digital-controller/arduino-uno-controller
parent66ac98ad1ecc6db33037cfe1441756be6dcb7205 (diff)
updated controller firmware with serial interface
Diffstat (limited to 'digital-controller/arduino-uno-controller')
-rw-r--r--digital-controller/arduino-uno-controller/firmware/firmware.ino86
1 files changed, 59 insertions, 27 deletions
diff --git a/digital-controller/arduino-uno-controller/firmware/firmware.ino b/digital-controller/arduino-uno-controller/firmware/firmware.ino
index e87db8d..3735c4a 100644
--- a/digital-controller/arduino-uno-controller/firmware/firmware.ino
+++ b/digital-controller/arduino-uno-controller/firmware/firmware.ino
@@ -1,41 +1,73 @@
#include <Wire.h>
-#define I2C_SLAVE_ADDR 0x26 // I2C slave address (38, 0x26)
+#define INPUT_SIZE 100 // TODO: make this a reasonable value
+#define sep " "
+char input[INPUT_SIZE + 1];
-void setup()
-{
+char c_address = '0';
+char c_led = '0';
+char c_fan = '0';
+int address = 0;
+int led = 0;
+int fan = 0;
+
+void setup() {
pinMode(A4, OUTPUT);
pinMode(A5, OUTPUT);
- // init the Wire object
Wire.begin();
-
- // wait for slave to finish any init sequence
- delay(2000);
-
Serial.begin(9600);
}
-void loop()
-{
- for( int a=10; a<=255; a++ ){
- //generate buffer containing data to send via I2C
- uint8_t buf[1];
- buf[0] = 255-a; // adjusting this byte changes fan speed. Can be adjusted from 0 to 256.
- buf[1] = a; // adjusting this byte changes LED intensity. Can be adjusted from 0 to 256.
- Serial.println(int(buf));
+void loop() {
+}
- // send buffer
- Wire.beginTransmission(I2C_SLAVE_ADDR);
- Wire.write(buf, 2);
- Wire.endTransmission();
-
- // delay 20 milliseconds to accomodate slave onReceive()
- delay(20);
+void scan() {
+ Serial.println("scanning!");
+ byte error, address;
+
+ for(address = 1; address < 127; address++ )
+ {
+ // The i2c_scanner uses the return value of
+ // the Write.endTransmisstion to see if
+ // a device did acknowledge to the address.
+ Wire.beginTransmission(address);
+ error = Wire.endTransmission();
- /////////////////////// WHY DO I NEED THIS PART?//////////////////////////
- Wire.requestFrom(I2C_SLAVE_ADDR, 1);
+ if (error == 0)
+ {
+ Serial.print("I2C device found at address ");
+ Serial.println(address);
+ }
+ }
- // delay 1 second so user can watch results
- delay(50);
+}
+
+void serialEvent() { // occurs whenever new data comes in the hardware serial RX
+ // read serial into input char array
+ byte size = Serial.readBytesUntil('\n', input, INPUT_SIZE);
+ input[size] = 0;
+ // parse input
+ char *c_address = strtok(input, sep);
+ char *c_led = strtok(0, sep);
+ char *c_fan = strtok(0, sep);
+ // convert input
+ address = atoi(c_address);
+ led = atoi(c_led);
+ fan = atoi(c_fan);
+ // scan if address is less than zero
+ if (address < 0) {
+ scan();
}
+ // write to peripheral
+ uint8_t buf[1];
+ buf[0] = fan;
+ buf[1] = led;
+ Wire.beginTransmission(address);
+ Wire.write(buf, 2);
+ Wire.endTransmission();
+}
+
+void serialEventRun(void) {
+ // this runs inside of the main loop, essentially
+ if (Serial.available()) serialEvent();
}