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changeset 1417:14c3e340717c

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* include/var_io.h: Improved accuracy for baud rate divider computation.
author asl
date Fri, 05 Dec 2003 09:10:13 +0000
parents 786e2e6e3c3d
children 879ff7a40226
files packages/hal/arm/at91/var/current/ChangeLog packages/hal/arm/at91/var/current/include/var_io.h
diffstat 2 files changed, 6 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/packages/hal/arm/at91/var/current/ChangeLog
+++ b/packages/hal/arm/at91/var/current/ChangeLog
@@ -1,3 +1,8 @@
+2003-12-02  Thomas Koeller  <thomas.koeller@baslerweb.com>
+
+	* include/var_io.h: Improved accuracy for baud rate divider
+	computation.
+
 2003-10-23  Thomas Koeller  <thomas.koeller@baslerweb.com>
 
 	* src/at91_misc.c: Fixed recognition of spurious
--- a/packages/hal/arm/at91/var/current/include/var_io.h
+++ b/packages/hal/arm/at91/var/current/include/var_io.h
@@ -135,7 +135,7 @@
 #define AT91_US_TPR 0x38  // Transmit pointer register
 #define AT91_US_TCR 0x3c  // Transmit counter register
 
-#define AT91_US_BAUD(baud) (CYGNUM_HAL_ARM_AT91_CLOCK_SPEED/(16*(baud)))
+#define AT91_US_BAUD(baud) ((CYGNUM_HAL_ARM_AT91_CLOCK_SPEED/(8*(baud))+1)/2)
 
 //=============================================================================
 // PIO