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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@d0773d
My project consists of espruino, environment sensors and 4 blue 7 segment displays
Datasheet(specifically decimals): https://github.com/sparkfun/Serial7SegmentDisplay/wiki/Special-Commands#decimal
What I would like to accomplish is send data, for an example send the room temp, i.e. 76.7F to the 7-segment display. Depending on where the decimal place is, turn on that decimal which I dont think is that hard to do. What I am struggling with is calculating the bytes to send in order to turn on the specific decimal.
To better understand this i will use the github totorial for my example. For example, To turn on the colon, apostrophe, and far-right decimal point we need to set bits 4, 5, and 3, respectively. Our data byte will therefore be: 0b00111000 (ie. hex 0x38, or decimal 56).
From experience, I know the 0b signifies the data following is in binary format and 00111000 equals 56. Where did the 56 come from? There's a handy chart explaining the bit layout, however I still don't understand.