安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
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- testing - ULP unit of least precision - Stack Overflow
Note that the ULP varies depending on the exponent The exceptions I mentioned occur at the very largest representable finite value (where the number can only be increased by producing infinity), the very smallest (most negative) representable finite value, at zero and subnormal numbers (where special things happen with the fraction and the
- how to use esp32 ulp interrupt pulse counter and periodic wake up . . .
If you want to count pulses while in deep sleep youuse the ULP Code on the ULP continues to execute when the board wakes up and goes to normal power mode So when it is awake, it will still run the counter on the ULP processor unless you stop the ULP periodic wake up timer, ULP will keep waking up and running while the main CPU is active
- How to compute `ulp`when `Math. ulp` is missing? - Stack Overflow
* * use a precalculated value for the ulp of Double MAX_VALUE * private static final double MAX_ULP = 1 9958403095347198E292; ** * Returns the size of an ulp (units in the last place) of the argument
- Calculate the unit in the last place (ULP) for doubles
phoog_ULP(positive x)--> a positive number Good phoog_ULP(negative x)--> a negative number I would expect positive number To fix this I recommend instead: long bits = BitConverter DoubleToInt64Bits(value) 0x7FFFFFFFFFFFFFFFL; Below are fringe cases that need resolution should you care
- Floating point error in ULPs (units in the last place)
The question strikes me as off-topic for this site For the example given, the numerical magnitude of 1 ulp = 0 001 The difference between 0 200 and the correct result of 0 170 is 0 030 and therefore 30 ulps –
- ESP32 ULP Coprocessor doesn´t wakeup from time
My application should initialize the ULP coprocessor and the coprocessor should observe one GPIO The ULP Timer should wake up the coprocessor in certain intervals and then the coprocessor should check the GPIO and turn on an LED, depending on the state of the GPIO I use the following code: main cpp
- Is it possible to use ULP to wake up ESP-WROOM32? Contemplating . . .
which also didn't work Searching around, it seems like this chip might be from before the ULP wakeup was stable Based on that, I am thinking this module doesn't support wake on ULP, and I have to wire an output from the ULP back to the reset pin to get the main CPU to wake up This will still let me use the ULP to do a more complicated wake-up
- floating point - Is there a standard function for computing units in . . .
For a number x in the binary floating point number system, units in the last place is defined as ulp(x) = 2^{E(x)} * 2^{1 - p} = 2^{E(x)}*epsilon, where the exponent is the exponent of the base 2 used to represent x, p is the precision of the number format (53 for the double precision format), and epsilon = 2^{1-p} is the machine tolerance
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