SPI problem spidev library to interface with one sensor and it requires to send 32 bits of data.
March 9, 2023, 06:12
I want to send 32 bits of data (lets say 0X128932). But, xfer2 sends just 8 bits of data or list of 8 bits of data. So, I am sending 32 bits of data in list as [0x12,0x89,0x32] as I have saleae and i am checking the spi waveform on the logic analyser. So, I want to ask is 0x128932 same as [0x12,0x89,0x32] ??
note here the data send is [0x19,0x00,0x00] Is this equivalent to 0x190000??
Also, how to receive 16 bit value in spi?
since it will be send 8 bits at a time
iirc it is in sequence
"content" is application level, so it depends on you what you can send
how you split is up to you.
That is up to you entirely...
But i have no idea how to do it
This is wat i am asking
lets say you have digit 128932h. that is 1214770d.
you know it will be 4x2^8
so...
something is wrong, that is not 4byte number.
Atmp = 1214770 / 256 / 256
Atmp = 4745.1953125 / 256
Atmp = 18.535919189453125
A = int(Atmp) = 18
it will be 3byte.
Btmp = (Atmp - A) 256
Btmp = 0.535919189453125 256
Btmp = 137.1953125
B = int(Btmp) = 137
C = (Btmp - B) 256
C = 0.1953125 256
C = 50
your digits to send are 18, 137, 50 in decimal. Convert it to hex and you get 12h, 89h, 32h
simple math 🙂 <@1082203653999448095>
or you can just split it by two if you have it already as hex.
but that would involve string.
OR ... you know what ...
just divide by 100 😄
not sure tho, if int supports hexa values
can u hckec
check the new post
what new post
so between spi.write and spi.read
the chip select is getting high
during a complete spi transaction chip select should be low right
no idea, sorry, dont know spi protocol by heart...