Help me to work with 10bits data

[kikkubey]

Dear all,

I have 4 numbers (A[0-3]) stored 10 bits data. the first 8 bits data stored in 1 byte data arrays (B[0-3]). the last 2bits of each A[i] stored sequentially in 1 byte number C (the first two bits of C is the last 2 bits of A[0]). Could you please help me to restore A array from B and C data in C-language?

short A[4]; // unsigned
unsigned char B[4];
unsigned char C;

how to set first 6bits of A[0] to zero? and then set the next 8bits of A[0] following to B[0]; and then set the last 2bits of A[0] to the first 2bits of C

Thank you very much,

kik

[donbock]

I have 4 numbers (A[0-3]) stored 10 bits data. the first 8 bits data stored in 1 byte data arrays (B[0-3]). the last 2bits of each A[i] stored sequentially in 1 byte number C (the first two bits of C is the last 2 bits of A[0]). Could you please help me to restore A array from B and C data in C-language?

short A[4]; // unsigned
unsigned char B[4];
unsigned char C;

In what follows, "cat" refers to a bit-concatenation operation. Have I correctly restated your requirements?
... A[0] = B[0] cat (first two bits of C);
... A[1] = B[1] cat (second two bits of C);
... A[2] = B[2] cat (third two bits of C);
... A[3] = B[3] cat (last two bits of C);
I assume "the first two bits" are the two most-significant bits.

If so, then you have two basic tasks:
1. Extract the proper two bits from C.
2. Perform the bit-concatenation operation.

Do you have any ideas for how to perform these tasks in C/C++?

[kikkubey]

In what follows, "cat" refers to a bit-concatenation operation. Have I correctly restated your requirements?
... A[0] = B[0] cat (first two bits of C);
... A[1] = B[1] cat (second two bits of C);
... A[2] = B[2] cat (third two bits of C);
... A[3] = B[3] cat (last two bits of C);
I assume "the first two bits" are the two most-significant bits.

If so, then you have two basic tasks:
1. Extract the proper two bits from C.
2. Perform the bit-concatenation operation.

Do you have any ideas for how to perform these tasks in C/C++?

yes, thank you for making my question more clear,