From a89135e23145cd538db501fd5c8b60bc2fcd4cb3 Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Fri, 20 Jan 2012 03:37:29 +0000
Subject: Leverage some bit timing logic from LPC17xx to the STM32 CAN driver

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4317 42af7a65-404d-4744-a932-0658087f49c3
---
 nuttx/arch/arm/src/stm32/stm32_can.h | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

(limited to 'nuttx/arch/arm/src/stm32/stm32_can.h')

diff --git a/nuttx/arch/arm/src/stm32/stm32_can.h b/nuttx/arch/arm/src/stm32/stm32_can.h
index b842627b8..15203b5c9 100644
--- a/nuttx/arch/arm/src/stm32/stm32_can.h
+++ b/nuttx/arch/arm/src/stm32/stm32_can.h
@@ -73,6 +73,29 @@
 #  error "CONFIG_CAN2_BAUD is not defined"
 #endif
 
+/* User-defined TSEG1 and TSEG2 settings may be used.
+ *
+ * CONFIG_CAN_TSEG1 = the number of CAN time quanta in segment 1
+ * CONFIG_CAN_TSEG2 = the number of CAN time quanta in segment 2
+ * CAN_BIT_QUANTA   = The number of CAN time quanta in on bit time
+ */
+
+#ifndef CONFIG_CAN_TSEG1
+#  define CONFIG_CAN_TSEG1 6
+#endif
+
+#if CONFIG_CAN_TSEG1 < 1 || CONFIG_CAN_TSEG1 > CAN_BTR_TSEG1_MAX
+#  errror "CONFIG_CAN_TSEG1 is out of range"
+#endif
+
+#ifndef CONFIG_CAN_TSEG2
+#  define CONFIG_CAN_TSEG2 7
+#endif
+
+#if CONFIG_CAN_TSEG2 < 1 || CONFIG_CAN_TSEG2 > CAN_BTR_TSEG2_MAX
+#  errror "CONFIG_CAN_TSEG2 is out of range"
+#endif
+
 /************************************************************************************
  * Public Types
  ************************************************************************************/
-- 
cgit v1.2.3