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C-Callable Interface to Flash Algorithms
PRELIMINARY
A-27
Assembly Source Listings and Program Examples
PRELIMINARY
A.2 C-Callable Interface to Flash Algorithms
The two functions erase() and program() are intended for in-application pro-
gramming of the ’F20x/F24x flash module. These functions were written to be
C callable, but they can also be called from assembly as long as the C stack
calling convention is used.
*****************************************************
* This file contains two C–callable functions: *
* program(), and erase() *
* These functions are used for programming and *
* erasing the on–chip flash EEPROM of the ’F2XX *
* product family. *
*****************************************************
* The functions provide a C–callable, interface to *
* the standard ’F2XX flash algorithms. They can *
* also be used from assembly code, as long as the *
* C stack calling convention is used. Since the *
* standard flash algorithms are actually used to *
* perform the various flash operations, they must *
* must be combined with this code at link time. *
**
* The erase function includes all the operations *
* (clear+erase+flw) required to prepare the flash *
* for programming. In addition to providing the *
* C–callable interface, this function is very *
* useful since it provides a single call to erase *
* the flash memory. *
* Since programming the device requires a single *
* algorithm, the only purpose for the program() *
* function is to provide a C–callable interface. *
* The program() function transfers a specified *
* block of data memory into a specified, erased *
* flash array. *
**
* The parameters for each function are described *
* in detail below. Note these functions cannot *
* reside in the same flash module that they are *
* meant to modify. *
**
* 10/29/97 Ruben D. Perez *
* DSP Applications Team *
* Texas Instruments, Inc. *
* 03/20/98 Updated for inclusion in flash *
* technical reference. *
***************************************************
.title ”C–callable Interface to ’F2XX Flash Algorithms**”
;**C–callable functions defined in this file.
.global _erase, _program