manually handle AVR i2c setspeed to handle slow clocks #104
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…re-avr/blob/master/libraries/Wire/src/utility/twi.c#L139 which means we cannot get below 30.5mhz!
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issue opened at arduino/ArduinoCore-avr#495 in case they want a fix! |
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@ladyada I tried the prescaler solution in my AGS02MA library and could run I2C (on AVR) at 25 KHz and 10 KHz . Also I added a +1 on your issue for an TWSR aware I2C.setClock() - arduino/ArduinoCore-avr#495 |
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yep all good - this is why i like wrappering i2c/spi in this way - theres just so many wierd dependancies and exceptions that our libraries got really complex |
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prescaler is not calculated here https://github.com/arduino/ArduinoCore-avr/blob/master/libraries/Wire/src/utility/twi.c#L139 which means we cannot get below 30.5mhz!
cc @RobTillaart this fixes up AGS02MA behavior