Gecko3 - CCC Event Weblog

E. Quellcode
#include ” s p i . h”
#include ”m25p16 . h”
#include ” i i c e x t c h i p c o m . h”
27 #define w r i t e n o k 1 // d e f i n i t i o n f o r w r i t e s t a t e
#define w r i t e o k 0 // d e f i n i t i o n f o r w r i t e s t a t e
#define f i l e s i z e 130952 // f i l e s i z e f o r XC3S200 ( important : you must
a d j u s t t h i s s i z e f o r o t h e r d e v i c e s )
#define highaddr memory range 0 x01 // 1 stand f o r t h e high address range in t h e SPI
Flash
32 extern BOOL f l a s h r d e n ;
extern BOOL new cfg ; // d e t e c t a new c o n f i g u r a t i o n
extern unsigned long s p i f l a s h a d d r e s s ; // memory a d r e s s from SPI Flash
BOOL w r i t e s t a t u s = 1 ; // s e t w r i t e s t a t e on not ok
37 unsigned int o f f s e t ; // o f f s e t f o r w r i t e t r a n s a c t i o n
// unsigned i n t r e a d s t a t u s ;
void s p i f l a s h i n i t ( void )
{
42 // Set Port A s e t t i n g s f o r SPI Flash communication
OEA |= 0 x01 ; // Port A b i t 0 output f o r SCLK
OEA |= 0 x02 ; // Port A b i t 1 output f o r MOSI
OEA &= 0xFB ; // Port A b i t 2 i n p u t f o r MISO
OEA |= 0 x08 ; // Port A b i t 3 output f o r SPI CS F
47 }
void s p i f l a s h w r ( void )
{
WORD count , i ;
52 i f ( s w i t c h r d ( ) == highaddr memory range )
{
l e d w r (0 x06 ) ;
s p i f l a s h a d d r e s s = 0 x100000 ;
}
57 while ( ! ( EP2468STAT & bmEP2EMPTY) ) // check EP2 EMPTY( busy ) b i t in EP2468STAT (SFR) ,
core s e t ’ s t h i s b i t when FIFO i s empty
{
// Autopointer source a d r e s s
AUTOPTRH1 = MSB( &EP2FIFOBUF ) ;
AUTOPTRL1 = LSB( &EP2FIFOBUF ) ;
62
count = (EP2BCH 256) // i f i n p u t d a t a l o n g e r than 257 Bytes
{
o f f s e t = count − 2 5 4 ; // we must c a l c u l a t e t h e o f f s e t
// e . g . t h e EP2 FIFO c ontent ( count ) i s 280 b y t e s , t h e o f f s e t
i s 26
// and t h e for −l o op ( writePageProgram ( ) ) r e p e a t 254 times
77 // two b y t e send t h e startPageProgramm ( ) and
lastPageProgramm ( ) f u n c t i o n s
} else
{
o f f s e t = 2 ; // i f i n p u t d a t a s h o r t e r , t h e o f f s e t i s two because we
78 Matthias Zurbrügg, Christoph Zimmermann