Plasmafountain fucked around with this message at 21:24 on Feb 28, 2023

Plasmafountain fucked around with this message at 21:24 on Feb 28, 2023

void SpiStart()
{	
	// set SPI select lines high
	DigitalPinConfigure(SR_SELECT, OUTPUT_HIGH);
	DigitalPinConfigure(LCD_SELECT, OUTPUT_HIGH);
	
	// set *SS, MOSI, and SCK to outputs and MISO as input
	// if *SS is not an output it will put the SPI port into slave mode when pulled low
	DigitalPinConfigure(5, OUTPUT_LOW);		// *SS
	DigitalPinConfigure(6, OUTPUT_LOW);		// MOSI
	DigitalPinConfigure(7, INPUT_WITH_PULLUP);	// MISO
	DigitalPinConfigure(8, OUTPUT_LOW);		// SCK
	
	// enable SPI system as master with a clock prescale of 4, a high SCK idle line, and data sampling on trailing clock edge.
	// SPI speed is limited by the LCD which can communicate at a max of 100kHz 
	SPCR = _BV(SPE)|_BV(MSTR)|_BV(CLKPS1)|_BV(CPOL)|_BV(CPHA);
}

PDP-1 fucked around with this message at 18:19 on Jul 6, 2014

Plasmafountain fucked around with this message at 21:25 on Feb 28, 2023

PDP-1 fucked around with this message at 21:05 on Jul 6, 2014

Plasmafountain fucked around with this message at 21:25 on Feb 28, 2023

int val, newval;

void setup() {
  val = 5; // i assume this is what you meant by val = NUMBER
}

void loop {
  newval = val * analogRead(A0); //newval now contains 5* sensor reading
  val = newval; //val and newval are now the same?
  delay(50); //wait 50 ms
}

int last;

void loop() {
  int val = analogRead(A0);
  int avg = (last + val)/2;
  last = val;
}

Sagebrush fucked around with this message at 23:13 on Jul 6, 2014

String old_subscriber_count = "";

void loop() {
  Process p;

  p.runShellCommand("ruby /usr/lib/get_initial_sub_count.rb");
  // script returns a number like "89343"

  while (p.running()); // do nothing
  
  while (p.available()) {
    char c = p.read();
    if (isDigit(c)){
      old_subscriber_count += c;
    }
  Serial.print(old_subscriber_count); // prints "89343"

  Serial.print(old_subscriber_count.toInt());
  // prints "23807", which is what you'd get if
  // you topped out at 32768, counted up to
  // 32768 again, and then finally get 23807.
  // 32768 + 32768 + 23807 = 89343

  old_subscriber_count = "";

  String test = "89343";
  Serial.print(test.toInt()); // THIS PRINTS 89343
  
  delay(60000); // wait a minute
}

plasticbugs fucked around with this message at 03:19 on Jul 7, 2014

uint16_t var = 255;

Sagebrush fucked around with this message at 03:44 on Jul 7, 2014

// Set DDRD bit 3 to 0 to make port D bit 3 an input.
// Use boolean operators to AND the bits 11110111 with the register.
// This will force the 3rd bit to be zero because anything AND zero is zero.
// None of the other bits will be affected because one AND one is one, and
// zero AND one is zero.
DDRD &= ~0x08;
// Read PIND bit 3 to check if port D bit 3 is high or low.
// Again use boolean AND operator to check if register AND 00001000 is non-zero.
// This works because if bit 3 is high it will be one AND one which is equal to one,
// and if the bit is low it will be zero AND one which is zero.
if (PIND & 0x08) {
  Serial.println("Digital 3 is high!");
}
else {
  Serial.println("Digital 3 is low!");
}

mod sassinator fucked around with this message at 06:28 on Jul 7, 2014

Plasmafountain fucked around with this message at 21:25 on Feb 28, 2023

Sagebrush fucked around with this message at 02:17 on Jul 12, 2014