248 lines
10 KiB
C
248 lines
10 KiB
C
/**************************************************************************/
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/*!
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@file osal_none.h
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@author hathach (tinyusb.org)
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@section LICENSE
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Software License Agreement (BSD License)
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Copyright (c) 2013, hathach (tinyusb.org)
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of the copyright holders nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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INCLUDING NEGLIGENCE OR OTHERWISE ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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This file is part of the tinyusb stack.
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*/
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/**************************************************************************/
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/** \ingroup group_osal
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* \defgroup Group_OSNone None OS
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* @{ */
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#ifndef _TUSB_OSAL_NONE_H_
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#define _TUSB_OSAL_NONE_H_
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#include "common/tusb_fifo.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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//--------------------------------------------------------------------+
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// TASK API
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// NOTES: Each blocking OSAL_NONE services such as semaphore wait,
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// queue receive embedded return statement, therefore local variable
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// retain value before/after such services needed to declare as static
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// OSAL_TASK_LOOP
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// {
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// OSAL_TASK_BEGIN
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//
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// task body statements
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//
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// OSAL_TASK_LOOP_ENG
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// }
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//
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// NOTE: no switch statement is allowed in Task and subtask
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//--------------------------------------------------------------------+
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#define OSAL_TASK_DEF(_name, _str, _func, _prio, _stack_sz) osal_task_def_t _name;
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typedef uint8_t osal_task_def_t;
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typedef void* osal_task_t;
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static inline osal_task_t osal_task_create(osal_task_def_t* taskdef)
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{
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(void) taskdef;
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return (osal_task_t) 1; // return non zero
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}
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#define TASK_RESTART \
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_state = 0
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#define OSAL_TASK_BEGIN \
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static uint16_t _state = 0; \
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ATTR_UNUSED static uint32_t _timeout = 0; \
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(void) _timeout; \
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switch(_state) { \
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case 0: {
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#define OSAL_TASK_END \
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default: TASK_RESTART; break; \
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}} \
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return;
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#define osal_task_delay(msec) \
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do { \
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_timeout = tusb_hal_millis(); \
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_state = __LINE__; case __LINE__: \
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if ( _timeout + msec > tusb_hal_millis() ) \
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return TUSB_ERROR_OSAL_WAITING; \
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}while(0)
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//--------------------------------------------------------------------+
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// SUBTASK (a sub function that uses OS blocking services & called by a task
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//--------------------------------------------------------------------+
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#define OSAL_SUBTASK_BEGIN OSAL_TASK_BEGIN
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#define OSAL_SUBTASK_END \
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default: TASK_RESTART; break; \
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}} \
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return TUSB_ERROR_NONE;
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#define STASK_INVOKE(_subtask, _status) \
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do { \
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_state = __LINE__; case __LINE__: \
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{ \
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(_status) = _subtask; /* invoke sub task */ \
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if (TUSB_ERROR_OSAL_WAITING == (_status)) return TUSB_ERROR_OSAL_WAITING; \
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} \
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}while(0)
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//------------- Sub Task Assert -------------//
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#define STASK_RETURN(error) do { TASK_RESTART; return error; } while(0)
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#define STASK_ASSERT_ERR(_err) VERIFY_ERR_HDLR(_err, verify_breakpoint(); TASK_RESTART)
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#define STASK_ASSERT_ERR_HDLR(_err, _func) VERIFY_ERR_HDLR(_err, verify_breakpoint(); _func; TASK_RESTART )
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#define STASK_ASSERT(_cond) VERIFY_HDLR(_cond, verify_breakpoint(); TASK_RESTART)
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#define STASK_ASSERT_HDLR(_cond, _func) VERIFY_HDLR(_cond, verify_breakpoint(); _func; TASK_RESTART)
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//--------------------------------------------------------------------+
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// QUEUE API
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//--------------------------------------------------------------------+
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#define OSAL_QUEUE_DEF(_name, _depth, _type) FIFO_DEF(_name, _depth, _type, false)
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typedef fifo_t osal_queue_def_t;
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typedef fifo_t* osal_queue_t;
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static inline osal_queue_t osal_queue_create(osal_queue_def_t* qdef)
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{
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fifo_clear(qdef);
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return (osal_queue_t) qdef;
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}
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static inline bool osal_queue_send_isr(osal_queue_t const queue_hdl, void const * data)
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{
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return fifo_write( (fifo_t*) queue_hdl, data);
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}
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static inline void osal_queue_flush(osal_queue_t const queue_hdl)
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{
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queue_hdl->count = queue_hdl->rd_idx = queue_hdl->wr_idx = 0;
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}
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#define osal_queue_receive(queue_hdl, p_data, msec, p_error) \
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do { \
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_timeout = tusb_hal_millis(); \
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_state = __LINE__; case __LINE__: \
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if( queue_hdl->count == 0 ) { \
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if ( (msec != OSAL_TIMEOUT_WAIT_FOREVER) && ( _timeout + msec <= tusb_hal_millis()) ) \
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*(p_error) = TUSB_ERROR_OSAL_TIMEOUT; \
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else \
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return TUSB_ERROR_OSAL_WAITING; \
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} else{ \
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/*tusb_hal_int_disable_all();*/ \
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fifo_read(queue_hdl, p_data); \
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/*tusb_hal_int_enable_all();*/ \
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*(p_error) = TUSB_ERROR_NONE; \
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} \
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}while(0)
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//--------------------------------------------------------------------+
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// Semaphore API
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//--------------------------------------------------------------------+
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typedef struct
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{
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volatile uint16_t count;
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uint16_t max_count;
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}osal_semaphore_def_t;
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typedef osal_semaphore_def_t* osal_semaphore_t;
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static inline osal_semaphore_t osal_semaphore_create(osal_semaphore_def_t* semdef)
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{
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semdef->count = 0;
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semdef->max_count = 1;
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return semdef;
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}
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#define osal_semaphore_post_isr osal_semaphore_post
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static inline bool osal_semaphore_post(osal_semaphore_t sem_hdl)
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{
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if (sem_hdl->count < sem_hdl->max_count ) sem_hdl->count++;
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return true;
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}
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static inline void osal_semaphore_reset_isr(osal_semaphore_t sem_hdl)
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{
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sem_hdl->count = 0;
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}
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#define osal_semaphore_wait(sem_hdl, msec, p_error) \
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do { \
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_timeout = tusb_hal_millis(); \
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_state = __LINE__; case __LINE__: \
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if( sem_hdl->count == 0 ) { \
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if ( (msec != OSAL_TIMEOUT_WAIT_FOREVER) && (_timeout + msec <= tusb_hal_millis()) ) \
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*(p_error) = TUSB_ERROR_OSAL_TIMEOUT; \
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else \
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return TUSB_ERROR_OSAL_WAITING; \
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} else{ \
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/*tusb_hal_int_disable_all();*/ \
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sem_hdl->count--; \
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/*tusb_hal_int_enable_all();*/ \
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*(p_error) = TUSB_ERROR_NONE; \
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} \
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}while(0)
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//--------------------------------------------------------------------+
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// MUTEX API (priority inheritance)
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//--------------------------------------------------------------------+
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#if 0
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typedef osal_semaphore_t osal_mutex_t;
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static inline osal_mutex_t osal_mutex_create(void)
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{
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return osal_semaphore_create(1, 0);
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}
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static inline bool osal_mutex_release(osal_mutex_t mutex_hdl)
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{
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return osal_semaphore_post(mutex_hdl);
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}
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#define osal_mutex_wait osal_semaphore_wait
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* _TUSB_OSAL_NONE_H_ */
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/** @} */
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