Hey group,
I am trying to build a Decimal / Hex / Binary number demonstrator to teach electronics and microcontrollers to a bunch of Scouts (the Electronics merit badge is what I am teaching)
I am stuck on the following problem... (and running out of time before the upcoming class)
If I have a number x (from 0 to 15)
I need to set variables d,c,b,a to the binary representation of the 4 digit positions of x.
so if x = 8 which is %1000 in binary
then...
a should =0
b should =0
c should =0
d should =1
so if x = 9 which is %1000 in binary
then...
a should =1
b should =0
c should =0
d should =1
I have tried (with no success) many different methods including arraywrite and bin string modifiers but they are all failing.
I have tried a 4 byte array
I have tried trying to select each digit in the 4 bit binary number
I know there is a way I just can't get to it (yet)
My final purpose is to write each of the 4 digit positions to a I2C 4-digit 7-segment display, I need to be able to write each digit to its position 0-3 separately.
Any Ideas or guidance would be greatly appreciated.
My code is just a mess right now
here is a NON WORKING partial
How do I select a given digit from within a 4 bit number and send just that digit to the I2C display??
I guess I may have to resort to some sort of look up table for each of the 4 digit positions.
thanks
I am trying to build a Decimal / Hex / Binary number demonstrator to teach electronics and microcontrollers to a bunch of Scouts (the Electronics merit badge is what I am teaching)
I am stuck on the following problem... (and running out of time before the upcoming class)
If I have a number x (from 0 to 15)
I need to set variables d,c,b,a to the binary representation of the 4 digit positions of x.
so if x = 8 which is %1000 in binary
then...
a should =0
b should =0
c should =0
d should =1
so if x = 9 which is %1000 in binary
then...
a should =1
b should =0
c should =0
d should =1
I have tried (with no success) many different methods including arraywrite and bin string modifiers but they are all failing.
I have tried a 4 byte array
I have tried trying to select each digit in the 4 bit binary number
I know there is a way I just can't get to it (yet)
My final purpose is to write each of the 4 digit positions to a I2C 4-digit 7-segment display, I need to be able to write each digit to its position 0-3 separately.
Any Ideas or guidance would be greatly appreciated.
My code is just a mess right now
here is a NON WORKING partial
Code:
i2cwrite sda,scl,$e0,0,[bin1 x]
i2cwrite sda,scl,$e0,1,[b]
i2cwrite sda,scl,$e0,2,[c]
i2cwrite sda,scl,$e0,3,[d]I guess I may have to resort to some sort of look up table for each of the 4 digit positions.
thanks