diff options
Diffstat (limited to 'sys/arm/at91/at91_twireg.h')
| -rw-r--r-- | sys/arm/at91/at91_twireg.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/sys/arm/at91/at91_twireg.h b/sys/arm/at91/at91_twireg.h index 6cca101..7d61a4a 100644 --- a/sys/arm/at91/at91_twireg.h +++ b/sys/arm/at91/at91_twireg.h @@ -63,7 +63,10 @@ #define TWI_CWGR_CKDIV(x) ((x) << 16) /* Clock Divider */ #define TWI_CWGR_CHDIV(x) ((x) << 8) /* Clock High Divider */ #define TWI_CWGR_CLDIV(x) ((x) << 0) /* Clock Low Divider */ -#define TWI_CWGR_DIV(rate) ((at91_master_clock /(4*(rate))) - 2) +#define TWI_CWGR_DIV(rate) \ + (at91_is_sam9() ? \ + ((at91_master_clock /(4*(rate))) - 3) : \ + ((at91_master_clock /(4*(rate))) - 2)) /* TWI_SR */ /* TWI_IER */ |
