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/* | |
OneWireFirmata.cpp - Firmata library | |
Copyright (C) 2012-2013 Norbert Truchsess. All rights reserved. | |
Copyright (C) 2016 Jeff Hoefs. 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. | |
Last updated by Jeff Hoefs: January 23rd, 2016 | |
*/ | |
#include <ConfigurableFirmata.h> | |
#include "OneWireFirmata.h" | |
#include "Encoder7Bit.h" | |
boolean OneWireFirmata::handlePinMode(byte pin, int mode) | |
{ | |
if (IS_PIN_DIGITAL(pin) && mode == PIN_MODE_ONEWIRE) { | |
oneWireConfig(pin, ONEWIRE_POWER); | |
return true; | |
} | |
return false; | |
} | |
void OneWireFirmata::handleCapability(byte pin) | |
{ | |
if (IS_PIN_DIGITAL(pin)) { | |
Firmata.write(PIN_MODE_ONEWIRE); | |
Firmata.write(1); | |
} | |
} | |
void OneWireFirmata::oneWireConfig(byte pin, boolean power) | |
{ | |
ow_device_info *info = &pinOneWire[pin]; | |
if (info->device == NULL) { | |
info->device = new OneWire(pin); | |
} | |
for (int i = 0; i < 8; i++) { | |
info->addr[i] = 0x0; | |
} | |
info->power = power; | |
Firmata.sendString("config device"); | |
} | |
boolean OneWireFirmata::handleSysex(byte command, byte argc, byte* argv) | |
{ | |
if (command == ONEWIRE_DATA) { | |
if (argc > 1) { | |
byte subcommand = argv[0]; | |
byte pin = argv[1]; | |
ow_device_info *info = &pinOneWire[pin]; | |
OneWire *device = info->device; | |
if (device || subcommand == ONEWIRE_CONFIG_REQUEST) { | |
char buffer[20]; | |
sprintf(buffer, "subcmd = %u", subcommand); | |
Firmata.sendString(buffer); | |
switch (subcommand) { | |
case ONEWIRE_SEARCH_REQUEST: | |
case ONEWIRE_SEARCH_ALARMS_REQUEST: | |
{ | |
device->reset_search(); | |
Firmata.write(START_SYSEX); | |
Firmata.write(ONEWIRE_DATA); | |
boolean isAlarmSearch = (subcommand == ONEWIRE_SEARCH_ALARMS_REQUEST); | |
Firmata.write(isAlarmSearch ? (byte)ONEWIRE_SEARCH_ALARMS_REPLY : (byte)ONEWIRE_SEARCH_REPLY); | |
Firmata.write(pin); | |
Encoder7Bit.startBinaryWrite(); | |
byte addrArray[8]; | |
while (isAlarmSearch ? device->search(addrArray, false) : device->search(addrArray)) { | |
for (int i = 0; i < 8; i++) { | |
Encoder7Bit.writeBinary(addrArray[i]); | |
} | |
} | |
Encoder7Bit.endBinaryWrite(); | |
Firmata.write(END_SYSEX); | |
Firmata.sendString("alarms req sent"); | |
break; | |
} | |
case ONEWIRE_CONFIG_REQUEST: | |
{ | |
if (argc == 3 && Firmata.getPinMode(pin) != PIN_MODE_IGNORE) { | |
Firmata.setPinMode(pin, PIN_MODE_ONEWIRE); | |
oneWireConfig(pin, argv[2]); // this calls oneWireConfig again, this time setting the correct config (which doesn't cause harm though) | |
} else { | |
return false; | |
} | |
break; | |
} | |
default: | |
{ | |
if (subcommand & ONEWIRE_RESET_REQUEST_BIT) { | |
device->reset(); | |
for (int i = 0; i < 8; i++) { | |
info->addr[i] = 0x0; | |
} | |
} | |
if (subcommand & ONEWIRE_SKIP_REQUEST_BIT) { | |
device->skip(); | |
for (byte i = 0; i < 8; i++) { | |
info->addr[i] = 0x0; | |
} | |
} | |
if (subcommand & ONEWIRE_WITHDATA_REQUEST_BITS) { | |
int numBytes = num7BitOutbytes(argc - 2); | |
int numReadBytes = 0; | |
int correlationId; | |
argv += 2; | |
Encoder7Bit.readBinary(numBytes, argv, argv); //decode inplace | |
if (subcommand & ONEWIRE_SELECT_REQUEST_BIT) { | |
if (numBytes < 8) break; | |
device->select(argv); | |
for (int i = 0; i < 8; i++) { | |
info->addr[i] = argv[i]; | |
} | |
argv += 8; | |
numBytes -= 8; | |
Firmata.sendString("select request bit"); | |
} | |
if (subcommand & ONEWIRE_READ_REQUEST_BIT) { | |
if (numBytes < 4) break; | |
numReadBytes = *((int*)argv); | |
argv += 2; | |
correlationId = *((int*)argv); | |
argv += 2; | |
numBytes -= 4; | |
Firmata.sendString("read request bit"); | |
} | |
if (subcommand & ONEWIRE_DELAY_REQUEST_BIT) { | |
if (numBytes < 4) { | |
Firmata.sendString("break delay request"); | |
break; | |
} | |
Firmata.sendString("pre delayTask"); | |
Firmata.delayTask(*((long*)argv)); | |
argv += 4; | |
numBytes -= 4; | |
Firmata.sendString("delay request bit"); | |
} | |
if (subcommand & ONEWIRE_WRITE_REQUEST_BIT) { | |
for (int i = 0; i < numBytes; i++) { | |
info->device->write(argv[i], info->power); | |
} | |
Firmata.sendString("write request bit"); | |
} | |
char buffer2[20]; | |
sprintf(buffer2, "numBytes = %u", numReadBytes); | |
Firmata.sendString(buffer2); | |
if (numReadBytes > 0) { | |
Firmata.write(START_SYSEX); | |
Firmata.write(ONEWIRE_DATA); | |
Firmata.write(ONEWIRE_READ_REPLY); | |
Firmata.write(pin); | |
Encoder7Bit.startBinaryWrite(); | |
Encoder7Bit.writeBinary(correlationId & 0xFF); | |
Encoder7Bit.writeBinary((correlationId >> 8) & 0xFF); | |
for (int i = 0; i < numReadBytes; i++) { | |
Encoder7Bit.writeBinary(device->read()); | |
} | |
Encoder7Bit.endBinaryWrite(); | |
Firmata.write(END_SYSEX); | |
Firmata.sendString("onewire read reply"); | |
} | |
} | |
} | |
} | |
} | |
return true; | |
} | |
} | |
return false; | |
} | |
void OneWireFirmata::reset() | |
{ | |
for (int i = 0; i < TOTAL_PINS; i++) { | |
if (pinOneWire[i].device) { | |
free(pinOneWire[i].device); | |
pinOneWire[i].device = NULL; | |
} | |
for (int j = 0; j < 8; j++) { | |
pinOneWire[i].addr[j] = 0; | |
} | |
pinOneWire[i].power = false; | |
} | |
} |
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