diff options
Diffstat (limited to 'digital-driver/firmware/Test Sketchs/Master_Random_LED_I2C/Master_Random_LED_I2C.ino')
| -rw-r--r-- | digital-driver/firmware/Test Sketchs/Master_Random_LED_I2C/Master_Random_LED_I2C.ino | 134 |
1 files changed, 0 insertions, 134 deletions
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 deleted file mode 100644 index ac5f249..0000000 --- a/digital-driver/firmware/Test Sketchs/Master_Random_LED_I2C/Master_Random_LED_I2C.ino +++ /dev/null @@ -1,134 +0,0 @@ -//////////////////////////////////////////////////////////////////////////////////// -// 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 <Wire.h> - -#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); -} |