From 84407fe580156dc12f4792c08ee42d70df6c4427 Mon Sep 17 00:00:00 2001 From: Blaise Thompson Date: Tue, 19 Jan 2021 10:53:07 -0600 Subject: restructure repository --- digital-driver/firmware/Test Sketchs/.DS_Store | Bin 0 -> 8196 bytes .../Master_Random_LED_I2C.ino | 134 +++++++++++++++++++++ .../Slave_Random_LED_I2C/Slave_Random_LED_I2C.ino | 122 +++++++++++++++++++ 3 files changed, 256 insertions(+) create mode 100644 digital-driver/firmware/Test Sketchs/.DS_Store create mode 100644 digital-driver/firmware/Test Sketchs/Master_Random_LED_I2C/Master_Random_LED_I2C.ino create mode 100644 digital-driver/firmware/Test Sketchs/Slave_Random_LED_I2C/Slave_Random_LED_I2C.ino (limited to 'digital-driver/firmware/Test Sketchs') diff --git a/digital-driver/firmware/Test Sketchs/.DS_Store b/digital-driver/firmware/Test Sketchs/.DS_Store new file mode 100644 index 0000000..448e0b3 Binary files /dev/null and b/digital-driver/firmware/Test Sketchs/.DS_Store differ diff --git a/digital-driver/firmware/Test Sketchs/Master_Random_LED_I2C/Master_Random_LED_I2C.ino b/digital-driver/firmware/Test Sketchs/Master_Random_LED_I2C/Master_Random_LED_I2C.ino new file mode 100644 index 0000000..ac5f249 --- /dev/null +++ b/digital-driver/firmware/Test Sketchs/Master_Random_LED_I2C/Master_Random_LED_I2C.ino @@ -0,0 +1,134 @@ +//////////////////////////////////////////////////////////////////////////////////// +// I2C test program for Digital Photoreactor Controller using TinyWireS library // +// Run this Master program on an Arduino Uno. // +//////////////////////////////////////////////////////////////////////////////////// +// This test program is adapted from the TinyWireS stress test program // +// developed by Scott Hartog: https://github.com/rambo/TinyWire // +// // +// The master program picks a random number of bytes between 1 and 12. // +// It then sends that many bytes of randomd data to the AtTiny85 slave. // +// Then, the master reads that same number of bytes back from the slave. // +// The recieved data is then compared to the original transmitted data. // +// The results of this comparison are displayed in the serial monitor. // +// The process is then looped. // +// // +// BREADBOARD SETUP: // +// Arduino Uno R3 (D18/SDA) = I2C SDA // +// connect to SDA on slave with external pull-up (~4.7K) // +// Arduino Uno R3 (D19/SCL) = I2C SCL // +// connect to SCL on slave with external pull-up (~4.7K) // +// Arduino Uno R3 (D2) // +// connect to !RST on slave // +// Can alternatively connect !RST on slave to the Ardiuno "!RESET" pin // +// // +//////////////////////////////////////////////////////////////////////////////////// + +#include + +#define I2C_SLAVE_ADDR 0x26 // i2c slave address (38, 0x26) + +uint16_t count = 0; // total number of passes so far +uint16_t error_count = 0; // total errors encountered so far + +char c_buf[64]; // for creating messages + +void setup() +{ + + // init the serial port + Serial.begin(9600); + + // init the Wire object (for I2C) + Wire.begin(); + + // wait for slave to finish any init sequence + delay(2000); +} + +void loop() +{ + uint8_t i; + uint8_t req_rtn; // num bytes returned by requestFrom() call + uint8_t rand_byte_count; + uint8_t out_rand[16]; // data written from master + uint8_t in_rand[16]; // data read back from slave + + bool mismatch; + + // count total number of request + count++; + + // compute random number of bytes for this pass + rand_byte_count = random(16) + 1; + + // force the first three requests to be small so that the tx buffer doesn't overflow + // instantly and the user can see at least one successful transaction and some + // mismtaches before the usiTwiSlave.c library hangs on the line "while ( !txCount );". + if (count <= 3) rand_byte_count = 2; + + // generate, save, and send N random byte values + Wire.beginTransmission(I2C_SLAVE_ADDR); + for (i = 0; i < rand_byte_count; i++) + Wire.write(out_rand[i] = random(256)); + Wire.endTransmission(); + + // delay 20 milliseconds to accomodate slave onReceive() callback + // function. The actual time that slave takes is application dependent, but + // just storing the master's transmitted data does not take + // anywhere near 20ms. + delay(20); + + // read N bytes from slave + req_rtn = Wire.requestFrom(I2C_SLAVE_ADDR, (int)rand_byte_count); // Request N bytes from slave + for (i = 0; i < req_rtn; i++) + in_rand[i] = Wire.read(); + + // compare in/out data values + mismatch = false; + for (i = 0; i < rand_byte_count; i++) + mismatch = mismatch || (out_rand[i] != in_rand[i]); + + // increment the error counter if the number of byte variables don't match or + // if the data itself doesn't match + if (mismatch || (rand_byte_count != req_rtn)) + { + error_count++; + } + + // The rest of the program just displays the results to the serial port + + // display total requests so far and error count so far + snprintf(c_buf, sizeof(c_buf), "req: %3d,err: %3d", count, error_count); + Serial.println(c_buf); + + // display the random byte count, the number of bytes read back, and "MATCH"/"MISMATCH" + snprintf(c_buf, sizeof(c_buf), "size: %2d/%2d,%s", rand_byte_count, req_rtn, rand_byte_count != req_rtn?"MISMATCH <<--- !!!":"MATCH"); + Serial.println(c_buf); + + // display whether the data compare matched or mismatched + snprintf(c_buf, sizeof(c_buf), "data: %s", mismatch?"MISMATCH <<--- !!!":"MATCH"); + Serial.println(c_buf); + + // send up to three tx/rx bytes so that random data can be + // visually verified + if (rand_byte_count >= 1) + { + snprintf(c_buf, sizeof(c_buf), "rand[0]: %02x/%02x", out_rand[0], in_rand[0]); + Serial.println(c_buf); + } + + if (rand_byte_count >= 2) + { + snprintf(c_buf, sizeof(c_buf), "rand[1]: %02x/%02x", out_rand[1], in_rand[1]); + Serial.println(c_buf); + } + + if (rand_byte_count >= 3) + { + snprintf(c_buf, sizeof(c_buf), "rand[2]: %02x/%02x", out_rand[2], in_rand[2]); + Serial.println(c_buf); + } + + // delay 1 second so user can watch results + delay(1000); +} diff --git a/digital-driver/firmware/Test Sketchs/Slave_Random_LED_I2C/Slave_Random_LED_I2C.ino b/digital-driver/firmware/Test Sketchs/Slave_Random_LED_I2C/Slave_Random_LED_I2C.ino new file mode 100644 index 0000000..ef9df86 --- /dev/null +++ b/digital-driver/firmware/Test Sketchs/Slave_Random_LED_I2C/Slave_Random_LED_I2C.ino @@ -0,0 +1,122 @@ +//////////////////////////////////////////////////////////////////////////////////// +// 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