nurazur
commented
8 months ago Fallback mode did not work for me, when F_CPU clock is 4 MHz or below.
I am working on ATmega4808 and AVR dd devices.
this line works, replacing line #18 in OneWire\util\OneWire_direct_gpio.h:
#if defined(__AVR_ATmega4809__) || defined(__AVR_ATmega4808__) || defined (ARDUINO_avrdd)
Since the architecture of ATmega480x and AVR Dx is very similar, I assume this to work for AVR db series as well if you add
|| defined (ARDUINO_avrdb) to line #18
noeldum
Description
OneWire wont work on the new AVR Dx Series chips using board variant from SpenceKonde.
modified \Libraries\OneWire\2.3.7\OneWire\util\OneWire_direct_gpio.h
added condition in case ARDUINO_avrdb is defiend to achieve fall back mode and added following code modification. this should work with DA series and other boards with proper condition in to fall back mode.
if defined(ARDUINO_avrdb)
define PIN_TO_BASEREG(pin) (0)
define PIN_TO_BITMASK(pin) (pin)
define IO_REG_TYPE uint8_t
define IO_REG_BASE_ATTR
define IO_REG_MASK_ATTR
define DIRECT_READ(base, pin) digitalRead(pin)
define DIRECT_WRITE_LOW(base, pin) digitalWrite(pin, LOW)
define DIRECT_WRITE_HIGH(base, pin) digitalWrite(pin, HIGH)
define DIRECT_MODE_INPUT(base, pin) pinMode(pin,INPUT)
define DIRECT_MODE_OUTPUT(base, pin) pinMode(pin,OUTPUT)
warning "OneWire. Fallback mode. Using API calls for pinMode,digitalRead and digitalWrite. Operation of this library is not guaranteed on this architecture."
elif defined(AVR)