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authorCristian Maglie <c.maglie@bug.st>2013-08-08 16:43:19 +0200
committerCristian Maglie <c.maglie@bug.st>2013-08-08 16:43:19 +0200
commita8193ed933d9c9954cefbfb541cde56770ab5b74 (patch)
tree80796833fecca5d7426f1d09f7ac9870bab5f062 /libraries/Firmata/examples/I2CFirmata
parenta4c9fee673342304a5b12f7f2f7f9ecb9cb26d30 (diff)
parent5527c44aa443b20d63cf7a276180a36695233924 (diff)
Merge branch 'ide-1.5.x-library-to-new-format' into ide-1.5.x
Diffstat (limited to 'libraries/Firmata/examples/I2CFirmata')
-rw-r--r--libraries/Firmata/examples/I2CFirmata/I2CFirmata.ino228
1 files changed, 0 insertions, 228 deletions
diff --git a/libraries/Firmata/examples/I2CFirmata/I2CFirmata.ino b/libraries/Firmata/examples/I2CFirmata/I2CFirmata.ino
deleted file mode 100644
index 1da8963..0000000
--- a/libraries/Firmata/examples/I2CFirmata/I2CFirmata.ino
+++ /dev/null
@@ -1,228 +0,0 @@
-/*
- * Firmata is a generic protocol for communicating with microcontrollers
- * from software on a host computer. It is intended to work with
- * any host computer software package.
- *
- * To download a host software package, please clink on the following link
- * to open the download page in your default browser.
- *
- * http://firmata.org/wiki/Download
- */
-
-/*
- Copyright (C) 2009 Jeff Hoefs. All rights reserved.
- Copyright (C) 2009 Shigeru Kobayashi. All rights reserved.
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- See file LICENSE.txt for further informations on licensing terms.
- */
-
-#include <Wire.h>
-#include <Firmata.h>
-
-
-#define I2C_WRITE B00000000
-#define I2C_READ B00001000
-#define I2C_READ_CONTINUOUSLY B00010000
-#define I2C_STOP_READING B00011000
-#define I2C_READ_WRITE_MODE_MASK B00011000
-
-#define MAX_QUERIES 8
-
-unsigned long currentMillis; // store the current value from millis()
-unsigned long previousMillis; // for comparison with currentMillis
-unsigned int samplingInterval = 32; // default sampling interval is 33ms
-unsigned int i2cReadDelayTime = 0; // default delay time between i2c read request and Wire.requestFrom()
-unsigned int powerPinsEnabled = 0; // use as boolean to prevent enablePowerPins from being called more than once
-
-#define MINIMUM_SAMPLING_INTERVAL 10
-
-#define REGISTER_NOT_SPECIFIED -1
-
-struct i2c_device_info {
- byte addr;
- byte reg;
- byte bytes;
-};
-
-i2c_device_info query[MAX_QUERIES];
-
-byte i2cRxData[32];
-boolean readingContinuously = false;
-byte queryIndex = 0;
-
-void readAndReportData(byte address, int theRegister, byte numBytes)
-{
- if (theRegister != REGISTER_NOT_SPECIFIED) {
- Wire.beginTransmission(address);
- Wire.write((byte)theRegister);
- Wire.endTransmission();
- delayMicroseconds(i2cReadDelayTime); // delay is necessary for some devices such as WiiNunchuck
- }
- else {
- theRegister = 0; // fill the register with a dummy value
- }
-
- Wire.requestFrom(address, numBytes);
-
- // check to be sure correct number of bytes were returned by slave
- if(numBytes == Wire.available()) {
- i2cRxData[0] = address;
- i2cRxData[1] = theRegister;
- for (int i = 0; i < numBytes; i++) {
- i2cRxData[2 + i] = Wire.read();
- }
- // send slave address, register and received bytes
- Firmata.sendSysex(I2C_REPLY, numBytes + 2, i2cRxData);
- }
- else {
- if(numBytes > Wire.available()) {
- Firmata.sendString("I2C Read Error: Too many bytes received");
- } else {
- Firmata.sendString("I2C Read Error: Too few bytes received");
- }
- }
-
-}
-
-void sysexCallback(byte command, byte argc, byte *argv)
-{
- byte mode;
- byte slaveAddress;
- byte slaveRegister;
- byte data;
- int delayTime;
-
- if (command == I2C_REQUEST) {
- mode = argv[1] & I2C_READ_WRITE_MODE_MASK;
- slaveAddress = argv[0];
-
- switch(mode) {
- case I2C_WRITE:
- Wire.beginTransmission(slaveAddress);
- for (byte i = 2; i < argc; i += 2) {
- data = argv[i] + (argv[i + 1] << 7);
- Wire.write(data);
- }
- Wire.endTransmission();
- delayMicroseconds(70); // TODO is this needed?
- break;
- case I2C_READ:
- if (argc == 6) {
- // a slave register is specified
- slaveRegister = argv[2] + (argv[3] << 7);
- data = argv[4] + (argv[5] << 7); // bytes to read
- readAndReportData(slaveAddress, (int)slaveRegister, data);
- }
- else {
- // a slave register is NOT specified
- data = argv[2] + (argv[3] << 7); // bytes to read
- readAndReportData(slaveAddress, (int)REGISTER_NOT_SPECIFIED, data);
- }
- break;
- case I2C_READ_CONTINUOUSLY:
- if ((queryIndex + 1) >= MAX_QUERIES) {
- // too many queries, just ignore
- Firmata.sendString("too many queries");
- break;
- }
- query[queryIndex].addr = slaveAddress;
- query[queryIndex].reg = argv[2] + (argv[3] << 7);
- query[queryIndex].bytes = argv[4] + (argv[5] << 7);
- readingContinuously = true;
- queryIndex++;
- break;
- case I2C_STOP_READING:
- readingContinuously = false;
- queryIndex = 0;
- break;
- default:
- break;
- }
- }
- else if (command == SAMPLING_INTERVAL) {
- samplingInterval = argv[0] + (argv[1] << 7);
-
- if (samplingInterval < MINIMUM_SAMPLING_INTERVAL) {
- samplingInterval = MINIMUM_SAMPLING_INTERVAL;
- }
-
- samplingInterval -= 1;
- Firmata.sendString("sampling interval");
- }
-
- else if (command == I2C_CONFIG) {
- delayTime = (argv[4] + (argv[5] << 7)); // MSB
- delayTime = (delayTime << 8) + (argv[2] + (argv[3] << 7)); // add LSB
-
- if((argv[0] + (argv[1] << 7)) > 0) {
- enablePowerPins(PORTC3, PORTC2);
- }
-
- if(delayTime > 0) {
- i2cReadDelayTime = delayTime;
- }
-
- if(argc > 6) {
- // If you extend I2C_Config, handle your data here
- }
-
- }
-}
-
-void systemResetCallback()
-{
- readingContinuously = false;
- queryIndex = 0;
-}
-
-/* reference: BlinkM_funcs.h by Tod E. Kurt, ThingM, http://thingm.com/ */
-// Enables Pins A2 and A3 to be used as GND and Power
-// so that I2C devices can be plugged directly
-// into Arduino header (pins A2 - A5)
-static void enablePowerPins(byte pwrpin, byte gndpin)
-{
- if(powerPinsEnabled == 0) {
- DDRC |= _BV(pwrpin) | _BV(gndpin);
- PORTC &=~ _BV(gndpin);
- PORTC |= _BV(pwrpin);
- powerPinsEnabled = 1;
- Firmata.sendString("Power pins enabled");
- delay(100);
- }
-}
-
-void setup()
-{
- Firmata.setFirmwareVersion(2, 0);
-
- Firmata.attach(START_SYSEX, sysexCallback);
- Firmata.attach(SYSTEM_RESET, systemResetCallback);
-
- for (int i = 0; i < TOTAL_PINS; ++i) {
- pinMode(i, OUTPUT);
- }
-
- Firmata.begin(57600);
- Wire.begin();
-}
-
-void loop()
-{
- while (Firmata.available()) {
- Firmata.processInput();
- }
-
- currentMillis = millis();
- if (currentMillis - previousMillis > samplingInterval) {
- previousMillis += samplingInterval;
-
- for (byte i = 0; i < queryIndex; i++) {
- readAndReportData(query[i].addr, query[i].reg, query[i].bytes);
- }
- }
-}