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quick fix for driver to work with 4MHz

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This commit is contained in:
joxe 2009-06-23 13:12:37 +00:00
parent e353666550
commit a71664e8d1
1 changed files with 5 additions and 3 deletions
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8
core/dev/ds2411.c
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@ -28,7 +28,7 @@
*
* This file is part of the Contiki operating system.
*
* @(#)$Id: ds2411.c,v 1.2 2008/11/25 09:20:54 zhitao Exp $
* @(#)$Id: ds2411.c,v 1.3 2009/06/23 13:12:37 joxe Exp $
*/
/*
* Device driver for the Dallas Semiconductor DS2411 chip. Heavily
@ -89,13 +89,15 @@ unsigned char ds2411_id[8];
*
* This macro will loose badly if not passed a constant argument, it
* relies on the compiler doing the arithmetic during compile time!!
* TODO: Fix above comment to be correct - below code is modified for 4Mhz
*/
#define udelay(u) clock_delay((u*5 - 14)/6)
#define udelay(u) clock_delay((u*8 - 14)/6)
/*
* Where call overhead dominates, use a macro!
* Note: modified for 4 Mhz
*/
#define udelay_6() { _NOP(); _NOP(); _NOP(); _NOP(); _NOP(); }
#define udelay_6() { _NOP(); _NOP(); _NOP(); _NOP(); _NOP(); _NOP(); _NOP(); }
#endif /* CONTIKI_TARGET_SKY */