initialize vector

[Pepe]

Can a vector be initialized with more than 255 values?

Code Select Expand

Dim bVideoMem[1023] As Byte =       0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,_
                                    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,_
                                    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,_
                                    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,_
                                    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,_
                                    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,_
                                    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,_
                                    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,_
                                    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,_
                                    0x00, 0x80, 0xE0, 0xF0, 0xF8, 0xF8, 0x78, 0x78, 0x38, 0x38, 0x38, 0x38, 0x18, 0x1C, 0x1C, 0x1C,_
                                    0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,_
                                    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,_
                                    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,_
                                    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,_
                                    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,_
                                    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01


[charliecoutas]

Yes. But only if it is 16 bits long. 256 is the limit for a byte.
Sorry if I've mis-understood your question.

Charlie

[Pepe]

I'm not referring to the number of positions in the vector, which is 1024 and only 0 to 255 are assigned.

[top204]

If by 'vector', you mean a RAM 'array', then yes. It can be any length that the PIC device will allow. i.e. The amount of RAM it has.

For example:

Code Select Expand

    Dim bVideoMem[1023] As Byte = $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $80, $E0, $F0, $F8, $F8, $78, $78, $38, $38, $38, $38, $18, $1C, $1C, $1C,_
                                  $1C, $1C, $1C, $1C, $1C, $08, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $01,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $80, $E0, $F0, $F8, $F8, $78, $78, $38, $38, $38, $38, $18, $1C, $1C, $1C,_
                                  $1C, $1C, $1C, $1C, $1C, $08, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $01,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $80, $E0, $F0, $F8, $F8, $78, $78, $38, $38, $38, $38, $18, $1C, $1C, $1C,_
                                  $1C, $1C, $1C, $1C, $1C, $08, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                                  $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $01

'----------------------------------------------------------------------------
' The main program starts here
'
Main:
    bVideoMem[512] = 10

It is String variables that have a maximum of 255 characters.

[Pepe]

I ask because when simulating it in Proteus it gives me an error if it is more than 255

[top204]

I have looked in the compiler's code, and it is causing a problem if the byte array is assigned values at its creation, if it is above 255 elements. It was not giving the length of the flash memory data correctly to the counter, and was overflowing, and has now been corrected, and an update will follow ASAP.

To counter-act it, create a Flash8 data table, and load that into the array. Also, make sure you make the array a Heap type, otherwise, it will fill the lower RAM banks of the device, and the assembler code will need a lot more RAM bank mnemonics, and more bloated mnemonics to cater for them. Or add the:

Declare Auto_Heap_Arrays = On ' Tell the compiler to create arrays above standard variables

And the compiler will automatically create arrays out of the way of standard variables, and in higher RAM.

The same could be done with:

Declare Auto_Heap_Strings = On

And String variables will be created above standard variables as well, and make the code more efficient.

Code Select Expand

    Dim bVideoMem[1023] As Byte Heap
    Dim FlashData As Flash8 = $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $80, $E0, $F0, $F8, $F8, $78, $78, $38, $38, $38, $38, $18, $1C, $1C, $1C,_
                              $1C, $1C, $1C, $1C, $1C, $08, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $01,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $80, $E0, $F0, $F8, $F8, $78, $78, $38, $38, $38, $38, $18, $1C, $1C, $1C,_
                              $1C, $1C, $1C, $1C, $1C, $08, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $01,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $80, $E0, $F0, $F8, $F8, $78, $78, $38, $38, $38, $38, $18, $1C, $1C, $1C,_
                              $1C, $1C, $1C, $1C, $1C, $08, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00,_
                              $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $00, $01

'----------------------------------------------------------------------------
' The main program starts here
'
Main:
    bVideoMem = FlashData

Best regards
Les

[Pepe]

The problem is that the data in flash is less than 1024 and the assignment modifies all 1024 bytes of the array. Is there no way to only assign the amount of data that the flash has?

[top204]

The flash table has as many as there are data items. They are not arrays, and if the Flash8 table has 2 data items, it will take up 2 bytes of flash memory, and 1024 data entires will take up 1024 bytes of flash memory. The flash memory required multiplies if using Flash16, Flash24 or Flash32.

When transfering to an array, or accessing the Flash memory table, use the Bound directive, and this will give the amount of entries in a flash table - 1, for a For-Next Loop.

[Pepe]

I was referring to when a direct assignment is made without using for next, bmatrix = ftable, where bmatrix is a matrix of 1024 positions and ftable is 700 data from the flash