105 lines
2.6 KiB
C++
105 lines
2.6 KiB
C++
/*
|
|
* Marlin 3D Printer Firmware
|
|
* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
|
|
*
|
|
* Based on Sprinter and grbl.
|
|
* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#include "Marlin.h"
|
|
|
|
#if ENABLED(EXPERIMENTAL_I2CBUS)
|
|
|
|
#include "twibus.h"
|
|
|
|
#include <Wire.h>
|
|
|
|
TWIBus::twibus() {
|
|
Wire.begin(); // We use no address so we will join the BUS as the master
|
|
this->reset();
|
|
}
|
|
|
|
void TWIBus::reset() {
|
|
this->addr = 0;
|
|
this->buffer_s = 0;
|
|
this->buffer[0] = 0x00;
|
|
}
|
|
|
|
void TWIBus::address(uint8_t addr) {
|
|
this->addr = addr;
|
|
|
|
if (DEBUGGING(INFO)) {
|
|
SERIAL_ECHOPAIR("TWIBus::sendto: ", this->addr);
|
|
SERIAL_EOL;
|
|
}
|
|
}
|
|
|
|
void TWIBus::addbyte(char c) {
|
|
if (buffer_s >= sizeof(this->buffer)) return;
|
|
this->buffer[this->buffer_s++] = c;
|
|
|
|
if (DEBUGGING(INFO)) {
|
|
SERIAL_ECHOPAIR("TWIBus::addbyte: ", this->buffer[this->buffer_s -1]);
|
|
SERIAL_EOL;
|
|
}
|
|
}
|
|
|
|
void TWIBus::send() {
|
|
if (!this->addr) return;
|
|
if (DEBUGGING(INFO)) SERIAL_ECHOLNPGM("TWIBus::send()");
|
|
|
|
Wire.beginTransmission(this->addr);
|
|
Wire.write(this->buffer, this->buffer_s);
|
|
Wire.endTransmission();
|
|
|
|
// Reset the buffer after sending the data
|
|
this->reset();
|
|
}
|
|
|
|
void TWIBus::reqbytes(uint8_t bytes) {
|
|
if (!this->addr) return;
|
|
if (DEBUGGING(INFO)) {
|
|
SERIAL_ECHOPAIR("TWIBus::reqbytes(): ", bytes);
|
|
SERIAL_EOL;
|
|
}
|
|
|
|
millis_t t = millis() + this->timeout;
|
|
Wire.requestFrom(this->addr, bytes);
|
|
|
|
// requestFrom() is a blocking function
|
|
while (Wire.available() < bytes) {
|
|
if (ELAPSED(millis(), t)) break;
|
|
else continue;
|
|
}
|
|
|
|
SERIAL_ECHO_START;
|
|
SERIAL_ECHOPAIR("i2c-reply: from:", this->addr);
|
|
SERIAL_ECHOPAIR(" bytes:", Wire.available());
|
|
SERIAL_ECHOPGM (" data:");
|
|
|
|
// Protect against buffer overflows if the number of received bytes
|
|
// is less than the number of requested bytes
|
|
uint8_t wba = Wire.available();
|
|
for (int i = 0; i < wba; i++) SERIAL_CHAR(Wire.read());
|
|
SERIAL_EOL;
|
|
|
|
// Reset the buffer after sending the data
|
|
this->reset();
|
|
}
|
|
|
|
#endif //EXPERIMENTAL_I2CBUS
|