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completed rf-chip communication interface

This commit is contained in:
mightymax 2007-01-12 12:00:44 +00:00
parent fdfb4d3d04
commit d4a24ccfb7
2 changed files with 77 additions and 1 deletions
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47
desmume/src/wifi.c
View File

@ -97,7 +97,52 @@ void WIFI_resetRF(rffilter_t *rf) {
void WIFI_setRF_CNT(wifimac_t *wifi, u16 val)
{
wifi->rfIOCnt.val = val ;
if (!wifi->rfIOStatus.bits.busy)
wifi->rfIOCnt.val = val ;
}
void WIFI_setRF_DATA(wifimac_t *wifi, u16 val, u8 part)
{
if (!wifi->rfIOStatus.bits.busy)
{
rfIOData_t *rfreg = (rfIOData_t *)&wifi->RF;
switch (wifi->rfIOCnt.bits.readOperation)
{
case 1: /* read from RF chip */
/* low part of data is ignored on reads */
/* on high part, the address is read, and the data at this is written back */
if (part==1)
{
wifi->rfIOData.array16[part] = val ;
if (wifi->rfIOData.bits.address > (sizeof(wifi->RF) / 4)) return ; /* out of bound */
/* get content of the addressed register */
wifi->rfIOData.bits.content = rfreg[wifi->rfIOData.bits.address].bits.content ;
}
break ;
case 0: /* write to RF chip */
wifi->rfIOData.array16[part] = val ;
if (wifi->rfIOData.bits.address > (sizeof(wifi->RF) / 4)) return ; /* out of bound */
/* set content of the addressed register */
rfreg[wifi->rfIOData.bits.address].bits.content = wifi->rfIOData.bits.content ;
break ;
}
}
}
u16 WIFI_getRF_DATA(wifimac_t *wifi, u8 part)
{
if (!wifi->rfIOStatus.bits.busy)
{
return wifi->rfIOData.array16[part] ;
} else
{ /* data is not (yet) available */
return 0 ;
}
}
u16 WIFI_getRF_STATUS(wifimac_t *wifi)
{
return rfIOStatus.val ;
}

31
desmume/src/wifi.h
View File

@ -209,6 +209,30 @@ typedef union
u16 val ;
} rfIOCnt_t ;
typedef union
{
struct {
/* 0*/ unsigned busy:1;
/* 1*/ unsigned :15;
} bits ;
u16 val ;
} rfIOStat_t ;
typedef union
{
struct {
/* 0*/ unsigned content:18 ;
/*18*/ unsigned address:5;
/*23*/ unsigned :9;
} bits ;
struct {
/* 0*/ unsigned low:16 ;
/*16*/ unsigned high:16 ;
} val16 ;
u16 array16[2] ;
u32 val ;
} rfIOData_t ;
typedef union
{
struct {
@ -266,11 +290,18 @@ typedef struct
/* subchip communications */
rfIOCnt_t rfIOCnt ;
rfIOStat_t rfIOStatus ;
rfIOData_t rfIOData ;
bbIOCnt_t bbIOCnt ;
} wifimac_t ;
/* subchip communication IO functions */
void WIFI_setRF_CNT(wifimac_t *wifi, u16 val) ;
void WIFI_setRF_DATA(wifimac_t *wifi, u16 val, u8 part) ;
u16 WIFI_getRF_DATA(wifimac_t *wifi, u8 part) ;
u16 WIFI_getRF_STATUS(wifimac_t *wifi) ;
#ifdef __cplusplus