More STM32 quadrature encoder code

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4391 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 43 insertions, 1 deletions

diff --git a/nuttx/arch/arm/src/stm32/stm32_qencoder.h b/nuttx/arch/arm/src/stm32/stm32_qencoder.h
index 5c977caad..f0b93f857 100644
--- a/nuttx/arch/arm/src/stm32/stm32_qencoder.h
+++ b/nuttx/arch/arm/src/stm32/stm32_qencoder.h
@@ -49,6 +49,47 @@
 /************************************************************************************
  * Included Files
  ************************************************************************************/
+/* Timer devices may be used for different purposes.  One special purpose is as
+ * a quadrature encoder input device.  If CONFIG_STM32_TIMn is defined then the
+ * CONFIG_STM32_TIMn_QE must also be defined to indicate that timer "n" is intended
+ * to be used for as a quadrature encoder.
+ */
+
+#ifndef CONFIG_STM32_TIM1
+#  undef CONFIG_STM32_TIM1_QE
+#endif
+#ifndef CONFIG_STM32_TIM2
+#  undef CONFIG_STM32_TIM2_QE
+#endif
+#ifndef CONFIG_STM32_TIM3
+#  undef CONFIG_STM32_TIM3_QE
+#endif
+#ifndef CONFIG_STM32_TIM4
+#  undef CONFIG_STM32_TIM4_QE
+#endif
+#ifndef CONFIG_STM32_TIM5
+#  undef CONFIG_STM32_TIM5_QE
+#endif
+#ifndef CONFIG_STM32_TIM8
+#  undef CONFIG_STM32_TIM8_QE
+#endif
+
+/* Only timers 2-5, and 1 & 8 can be used as a quadrature encoder (at least for the
+ * STM32 F4)
+ */
+
+#undef CONFIG_STM32_TIM6_QE
+#undef CONFIG_STM32_TIM7_QE
+#undef CONFIG_STM32_TIM9_QE
+#undef CONFIG_STM32_TIM10_QE
+#undef CONFIG_STM32_TIM11_QE
+#undef CONFIG_STM32_TIM12_QE
+#undef CONFIG_STM32_TIM13_QE
+#undef CONFIG_STM32_TIM14_QE
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
 
 /************************************************************************************
  * Name: stm32_qeinitialize
@@ -59,13 +100,14 @@
  *
  * Input Parameters:
  *   devpath - The full path to the driver to register. E.g., "/dev/qe0"
+ *   tim     - The timer number to used.  time must be an element of {1,2,3,4,5,8}
  *
  * Returned Values:
  *   Zero on success; A negated errno value is returned on failure.
  *
  ************************************************************************************/
 
-int stm32_qeinitialize(FAR const char *devpath);
+int stm32_qeinitialize(FAR const char *devpath, int tim);
 
 #endif /* CONFIG_QENCODER */
 #endif /* __ARCH_ARM_SRC_STM32_STM32_QENCODER_H */