Hello everybody,

I need a brief explanation.
I would like to create an i2C library in which I have to write individual bits in different registers.

Specifically, this means

Register (0x01)
Bit 4

Possibly can someone write me a short code how this works.

I have the following methods available within the library.
write
write8
writebits

Thanks in advance.

write8

write8(1, 16#40); If i understand it correct should this write BIT 4 in register 01?

write

HoldCmd :BYTE :=16#F4;
write(ADR(HoldCmd),1);
This will write a byte into register 16 # F4.
But what bits?
All to 1 or all to 0 or something completely different?

writeBits

But unfortunately I have no idea how to use this command.

I would be very grateful for a short description

Input usiRegister USINT register
usiFirstBit USINT highest value bit to write (0..7)
usiLength USINT number of bits to write (1..usiFirstBit+1)
usiValue USINT value of the bits to set (0..2^usiLength-1)

Thanks in advance.

BR
MR. Pioneer

Hi!
This actually can be very easy, when I got your question right 😉. I would intuitively use Write8, as you did.
The interface is roughly:

Write8(usiRegister, usiValue)

So, to write your bit 4 to register 1, you need to call s.th. like this:

// when you start counting with 1
// => 0000 1000
Write8(1, 16#8);

// when you start counting with 0
// => 0001 0000
Write8(1, 16#10);

Alternatively, you can write it in binary form, instead of hex:

// when you start counting with 1
Write8(1, 2#00001000);

// when you start counting with 0
Write8(1, 2#00010000);