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QEncoder: Add mechanism to assure that architecture-specific IOCTL commands do not overlap.

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This commit is contained in:
Gregory Nutt
2017-02-25 11:15:59 -06:00
parent de0e2ec261
commit d77d322a61
3 changed files with 25 additions and 14 deletions
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include/nuttx/sensors/as5048b.h
+4 -4
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@@ -59,10 +59,10 @@
/* IOCTL Commands ***********************************************************/
#define QEIOC_ZEROPOSITION _QEIOC(QEIOC_USER+0) /* Arg: int32_t* pointer */
#define QEIOC_AUTOGAINCTL _QEIOC(QEIOC_USER+1) /* Arg: uint8_t* pointer */
#define QEIOC_DIAGNOSTICS _QEIOC(QEIOC_USER+2) /* Arg: uint8_t* pointer */
#define QEIOC_MAGNITUDE _QEIOC(QEIOC_USER+3) /* Arg: int32_t* pointer */
#define QEIOC_ZEROPOSITION _QEIOC(QE_AS5048B_FIRST+0) /* Arg: int32_t* pointer */
#define QEIOC_AUTOGAINCTL _QEIOC(QE_AS5048B_FIRST+1) /* Arg: uint8_t* pointer */
#define QEIOC_DIAGNOSTICS _QEIOC(QE_AS5048B_FIRST+2) /* Arg: uint8_t* pointer */
#define QEIOC_MAGNITUDE _QEIOC(QE_AS5048B_FIRST+3) /* Arg: int32_t* pointer */
/* Resolution ***************************************************************/
include/nuttx/sensors/qencoder.h
+18 -7
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@@ -1,7 +1,7 @@
/****************************************************************************
* include/nuttx/qencoder.h
*
* Copyright (C) 2012, 2015 Gregory Nutt. All rights reserved.
* Copyright (C) 2012, 2015, 2017 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
@@ -67,14 +67,25 @@
#define QEIOC_POSITION _QEIOC(0x0001) /* Arg: int32_t* pointer */
#define QEIOC_RESET _QEIOC(0x0002) /* Arg: None */
/* User defined ioctl cms should use QEIOC_USER like this:
*
* #define QEIOC_MYCMD1 _QEIOC(QEIOC_USER)
* #define QEIOC_MYCMD2 _QEIOC(QEIOC_USER+1)
* ...
#define QE_FIRST 0x0001 /* First required command */
#define QE_NCMDS 2 /* Two required commands */
/* User defined ioctl commands are also supported. These will be forwarded
* by the upper-half QE driver to the lower-half QE driver via the ioclt()
* method fo the QE lower-half interface. However, the lower-half driver
* must reserve a block of commands as follows in order prevent IOCTL
* command numbers from overlapping.
*/
#define QEIOC_USER 0x0003
/* See arch/arm/src/tiva/tiva_qencoder.h */
#define QE_TIVA_FIRST (QE_FIRST + QE_NCMDS)
#define QE_TIVA_NCMDS 3
/* See include/nuttx/sensors/as5048b.h */
#define QE_AS5048B_FIRST (QE_TIVA_FIRST + QEIOC_TIVA_NCMDS)
#define QE_AS5048B_NCMDS 4
/****************************************************************************
* Public Types