New I2C devices

[owSlave2.git] / common / I2C / USI_TWI_Master.h

diff --git a/common/I2C/USI_TWI_Master.h b/common/I2C/USI_TWI_Master.h
index f91c41b..d6b1f85 100644 (file)
--- a/common/I2C/USI_TWI_Master.h
+++ b/common/I2C/USI_TWI_Master.h
@@ -31,8 +31,13 @@
 \r
 // Defines controlling timing limits\r
 #define TWI_FAST_MODE\r
-\r
+#ifdef  __4MHZ__\r
+#define SYS_CLK  4000.0  // [kHz]\r
+#else\r
 #define SYS_CLK   8000.0  // [kHz]\r
+#endif\r
+\r
+\r
 \r
 #ifdef TWI_FAST_MODE               // TWI FAST mode timing limits. SCL = 100-400kHz\r
   #define T2_TWI    ((SYS_CLK *1300) /1000000) +1 // >1,3us\r