Reliable Startup for I2C Battery Backed RTC I’m not quite sure what to do or try next.Reliable Startup for I2C Battery Backed RTC Why the Arduino Wire library is not enough. Both libraries seem to be fairly simple users of the Mbed I2C object, so I’m at a loss for what might have changed between mbed-os 5.15 and 6.x.Īny insight, guidance, or general help is appreciated. Interestingly, the legacy OneWire library also seems to fail in the second single byte read in a polling loop as part of the 1-wire bus reset. MaximInterfaceDevices::DS2482_800 one_wire_master(i2c_wrapper, 0x30) įileHandle *mbed::mbed_override_console(int fd) while ((status & status_1WB) = status_1WB) MaximInterfaceMbed::I2CMaster i2c_wrapper(i2c_bus) It’s slightly different than the 5.15 version because of BufferedSerial. This is the basic test program for mbed-os 6.x based on the MaximInterface example with the additional channel selection for the DS2482-800. However, when running in 6.0.0, 6.1.0, and 6.2.0 the bus reset fails with a “Nack Error”. MaximInterface with the API fixes works in 5.15.4 the same as the unmodified version.

By simply removing the Uart masters and replacing the depricated waits with thread_sleep_for the library will compile in both 5.15.4 and all of the 6.x versions of mbed-os. However, it won’t immediately compile on mbed-os 6+ because of its use of Serial and wait_ms.

The MaximInterface library works as-is when I tested it on 5.15.4, and will detect the 1-wire devices on their respective busses.

Wire library i2c