Gecko3 - CCC Event Weblog

E.1. Firmware
SCLK = 0 ;
82 return inputdata ;
}
E.1.8. Kommunikation zwischen Host und FPGA
/∗ ∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗
∗ Diplomwork :
∗ Gecko3 SoC HW/SW Development Board
∗
5 ∗ ( ‘ \ ( ) ( ) ( )
∗ | ( ) ) | ( | | | | Berne U n i v e r s i t y o f Applied S c i e n c e s
∗ | < ’| ) | | School o f Engineering and
∗ | ( ) ) | | | | | | Information Technology
∗ ( / ’( ) ( ) ( )
10 ∗
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∗ Author : Matthias Zurbrügg
∗ Date o f c r e a t i o n : 16.11.2006
∗ D e s c r i p t i o n :
15 ∗ Source code o f read / w r i t e waveforms f u n c t i o n s
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#include ” fx2 . h”
20 #include ” f x 2 r e g s . h”
#include ” f x 2 s d l y . h”
#define GPIFREAD 4 // read b i t in GPIFTRIG r e g i s t e r
#define GPIF EP6 2 // EP6 b i t in GPIFTRIG r e g i s t e r
25 #define GPIF EP8 3 // EP8 b i t in GPIFTRIG r e g i s t e r
BYTE temp = 0 , i ; // temporary v a r i a b l e s f o r GPIF s t a t e machine break
c o n d i t i o n
s t a t i c WORD FIFOBC IN = 0 x0000 ; // v a r i a b l e t h a t c o n t a i n s EP6FIFOBCH/L v a l u e
s t a t i c WORD xdata Tcount = 0 x01 ; // s e t t r a n s a c t i o n count to one f o r run t h e
read waveform one times
30
void gpif wr waveform ( void )
{
i f ( GPIFTRIG & 0 x80 ) // i f GPIF i n t e r f a c e IDLE
{
35 EP6GPIFFLGSEL = 0 x01 ; // Set GPIF FIFO f l a g i f EP2 i s empty
SYNCDELAY;
GPIFTRIG = GPIF EP6 ; // launch GPIF FIFO WRITE Transaction from
EP6 FIFO
SYNCDELAY;
40 do
{
temp=(IOE&0x07 ) ; // read GPIF debug pins PE[ 0 : 2 ] f o r l o o k i n g t h e
c u r r e n t s t a t e ( show GSTAT in TRM)
i f ( temp==(IOE&0x07 ) ) // i f GPIF in t h e same s t a t e
{
45 for ( i =0; i