From 84407fe580156dc12f4792c08ee42d70df6c4427 Mon Sep 17 00:00:00 2001 From: Blaise Thompson Date: Tue, 19 Jan 2021 10:53:07 -0600 Subject: restructure repository --- .../Slave_Random_LED_I2C/Slave_Random_LED_I2C.ino | 122 --------------------- 1 file changed, 122 deletions(-) delete mode 100644 Digital Photoreactor Controller Firmware/Test Sketchs/Slave_Random_LED_I2C/Slave_Random_LED_I2C.ino (limited to 'Digital Photoreactor Controller Firmware/Test Sketchs/Slave_Random_LED_I2C/Slave_Random_LED_I2C.ino') diff --git a/Digital Photoreactor Controller Firmware/Test Sketchs/Slave_Random_LED_I2C/Slave_Random_LED_I2C.ino b/Digital Photoreactor Controller Firmware/Test Sketchs/Slave_Random_LED_I2C/Slave_Random_LED_I2C.ino deleted file mode 100644 index ef9df86..0000000 --- a/Digital Photoreactor Controller Firmware/Test Sketchs/Slave_Random_LED_I2C/Slave_Random_LED_I2C.ino +++ /dev/null @@ -1,122 +0,0 @@ -//////////////////////////////////////////////////////////////////////////////////// -// I2C test program for Digital Photoreactor Controller using TinyWireS library // -// Run this slave program on the AtTiny85. // -//////////////////////////////////////////////////////////////////////////////////// -// This test program is adapted from the TinyWireS stress test program // -// developed by Scott Hartog: https://github.com/rambo/TinyWire // -// // -// The slave program receives via I2C N bytes of random data in a single // -// receiveEvent() callback and stores that data in a global buffer. // -// It then responds the first requestEvent() callback with the same data. // -// The requestEvent() callback overwrites the data buffer with zeros after // -// responding so it will only respond correctly to the first requestEvent() // -// callback after each receiveEvent() callback. Subsequent requestEvent() // -// will respond with 0xff for all data bytes. // -// // -// // -// SETUP: // -// AtTiny85 Pin 2 = PB3 = Blink LED // -// Attiny85 Pin 3 (PB4) = LED PWM // -// AtTiny85 Pin 5 (PB0/SDA) = I2C SDA // -// connect to SDA on master with external pull-up (~4.7K) // -// AtTinyPin 6 (PB1) = Fan PWM // -// AtTiny Pin 7 (PB0/SCL) = I2C SCL // -// connect to SCL on master with external pull-up (~4.7K) // -// AtTiny Pin 1 (PB5/!RST) // -// connect to reset on master (or just pull-up) // -// // -//////////////////////////////////////////////////////////////////////////////////// - -#include "TinyWireS.h" // wrapper class for I2C slave routines - -#define I2C_SLAVE_ADDR 0x26 // I2C slave address (38, 0x26), - -uint8_t master_data[16]; // global buffer to store data sent from the master. -uint8_t master_bytes; // global variable to number of bytes sent from the master. - -const int LEDPin = 4; //Arduino pin 4, pin 3 on AtTiny85 pinout -const int FanPin = 1; //Arduino pin 1, pin 6 on AtTiny85 pinout -const int BlinkPin = 3; //Arduino pin 3, pin 2 on AtTiny85 pinout - -// Gets called when the ATtiny85 receives an I2C write slave request -void receiveEvent(uint8_t num_bytes) -{ - uint8_t i; - - // save the number of bytes sent from the master - master_bytes = num_bytes; - - // store the data from the master into the data buffer - for (i = 0; i < master_bytes; i++) - master_data[i] = TinyWireS.receive(); - - // set LED and Fan PWM duty to random byte values recieved from the master - analogWrite(FanPin, master_data[0]); - analogWrite(LEDPin, master_data[1]); - - // blink LED whenever data is successfuly recieved - digitalWrite(BlinkPin, HIGH); - delay(10); - digitalWrite(BlinkPin, LOW); - delay(10); - -} - -// Gets called when the ATtiny receives an i2c read slave request -void requestEvent() -{ - uint8_t i; - - // send the data buffer back to the master - for (i = 0; i < master_bytes; i++) - TinyWireS.send(master_data[i]); - - // corrupt the byte values in the data buffer - // so that subsequent call won't match - for (i = 0; i < master_bytes; i++) - master_data[i] += 0x5a; - - // corrupt length of the request, but dont' make it zero - - // if the usiTwiSlave.c is working fine, then this number is completely irrelevant - // because the requestEvent() callback will not be called again until - // after the next receiveEvent() callback, so the master_data and - // master_bytes variables will be set by that call. - - // If the usiTwiSlave.c has the issue of calling the requestFrom() callback - // for each byte sent, the buffer will accumulate by this amount *for each byte - // in the original request*. - // - // Making it zero will obscure the 1-byte send issue in the usiTwiSlave.c - // that is being tested. - // Making it small will allow a few requests to succeed before the tx buffer - // overflows and the usiTwiSlave.c hangs on the "while ( tmphead == txTail );" - // line - master_bytes = 2; -} - -void setup() -{ - // initialize the TinyWireS and usiTwiSlave libraries - TinyWireS.begin(I2C_SLAVE_ADDR); // init I2C Slave mode - - // register the onReceive() callback function - TinyWireS.onReceive(receiveEvent); - - // register the onRequest() callback function - TinyWireS.onRequest(requestEvent); - - pinMode(LEDPin, OUTPUT); // set pin for LED PWM - pinMode(FanPin, OUTPUT); // set pin for Fan PWM - pinMode(BlinkPin, OUTPUT); // set pin to blink LED - - TCCR0B = TCCR0B & 0b11111000 | 0b001; // sets internal timer of AtTiny85 to 31250 Hz for fast PWM for controlling fan speed -} - -void loop() -{ - // this needs to be here - /////////////Does this really need to be here????? - //TinyWireS_stop_check(); - // otherwise empty loop -} -- cgit v1.2.3