Mikroelektronika MIKROE-724 データシート

mikroBasic PRO for dsPIC30/33 and PIC24

MikroElektronika

347

FLASH_Read

FLASH_Read_Compact

sub  procedure  FLASH_Read(dim  address  as  longint,  dim  byref  write_to  as 

word[100], dim NoWords as word)

Description Reads required number of words from the flash memory in the “regular” mode.
Parameters - 

address

: starting address of the FLASH memory block to be read 

- 

write_to

: starting address of RAM buffer for storing read data 

- 

NoWords

: number of words to be read 

Address of RAM buffer for storing read data.

dim Buffer as word[10]

    start_address as longint

...

FLASH_Write(0x006500, data)

start_address = 0x6500

FLASH_Read(start_address, Buffer, 10)

The user should take care of the address alignment  (see the explanation  at the beginning  of this 

page).

sub procedure FLASH_Read_Compact(dim address as longint, dim byref write_to 

as byte[100], dim NoBytes as word)

Description Reads required number of bytes from the flash memory in the “compact” mode.
Parameters - 

address

: starting address of the FLASH memory block to be read 

- 

write_to

: starting address of RAM buffer for storing read data 

- 

NoBytes

: number of bytes to be read 

Address of RAM buffer for storing read data.

dim Buffer as byte[10]

    start_address as longint

...

FLASH_Write(0x006500, data)

start_address = 0x6500

FLASH_Read(start_address, Buffer, 10)

The user should take care of the address alignment  (see the explanation  at the beginning  of this 

page).

Library Example

In this example written for dsPIC30F4013, various read/write tecniques to/from the on-chip FLASH memory are shown. 

Flash  memory  is  mapped  to  address  space  3:2,  meaning  every  3  consecutive  bytes  of  Flash  have  2  consecutive 

address locations available. 

That is why mikroE’s library allows data to be written to Flash in two ways: ‘regular’ and ‘compact’. In ‘regular’ mode, 

which is used for variables that are size of 2 bytes and more, the 3rd (un-addressable) byte remains unused. 

In ‘compact’ mode, which can be used for 1 byte-sized variables/arrays, all bytes of flash are being used.