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Diffstat (limited to 'tinyusb/src/osal/osal_pico.h')
-rwxr-xr-x | tinyusb/src/osal/osal_pico.h | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/tinyusb/src/osal/osal_pico.h b/tinyusb/src/osal/osal_pico.h new file mode 100755 index 00000000..1c3366e0 --- /dev/null +++ b/tinyusb/src/osal/osal_pico.h @@ -0,0 +1,187 @@ +/* + * The MIT License (MIT) + * + * Copyright (c) 2020 Raspberry Pi (Trading) Ltd. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + * This file is part of the TinyUSB stack. + */ + +#ifndef _TUSB_OSAL_PICO_H_ +#define _TUSB_OSAL_PICO_H_ + +#include "pico/time.h" +#include "pico/sem.h" +#include "pico/mutex.h" +#include "pico/critical_section.h" + +#ifdef __cplusplus + extern "C" { +#endif + +//--------------------------------------------------------------------+ +// TASK API +//--------------------------------------------------------------------+ +static inline void osal_task_delay(uint32_t msec) +{ + sleep_ms(msec); +} + +//--------------------------------------------------------------------+ +// Binary Semaphore API +//--------------------------------------------------------------------+ +typedef struct semaphore osal_semaphore_def_t, *osal_semaphore_t; + +static inline osal_semaphore_t osal_semaphore_create(osal_semaphore_def_t* semdef) +{ + sem_init(semdef, 0, 255); + return semdef; +} + +static inline bool osal_semaphore_post(osal_semaphore_t sem_hdl, bool in_isr) +{ + (void) in_isr; + sem_release(sem_hdl); + return true; +} + +static inline bool osal_semaphore_wait (osal_semaphore_t sem_hdl, uint32_t msec) +{ + return sem_acquire_timeout_ms(sem_hdl, msec); +} + +static inline void osal_semaphore_reset(osal_semaphore_t sem_hdl) +{ + sem_reset(sem_hdl, 0); +} + +//--------------------------------------------------------------------+ +// MUTEX API +// Within tinyusb, mutex is never used in ISR context +//--------------------------------------------------------------------+ +typedef struct mutex osal_mutex_def_t, *osal_mutex_t; + +static inline osal_mutex_t osal_mutex_create(osal_mutex_def_t* mdef) +{ + mutex_init(mdef); + return mdef; +} + +static inline bool osal_mutex_lock (osal_mutex_t mutex_hdl, uint32_t msec) +{ + return mutex_enter_timeout_ms(mutex_hdl, msec); +} + +static inline bool osal_mutex_unlock(osal_mutex_t mutex_hdl) +{ + mutex_exit(mutex_hdl); + return true; +} + +//--------------------------------------------------------------------+ +// QUEUE API +//--------------------------------------------------------------------+ +#include "common/tusb_fifo.h" + +#if TUSB_OPT_HOST_ENABLED +extern void hcd_int_disable(uint8_t rhport); +extern void hcd_int_enable(uint8_t rhport); +#endif + +typedef struct +{ + tu_fifo_t ff; + struct critical_section critsec; // osal_queue may be used in IRQs, so need critical section +} osal_queue_def_t; + +typedef osal_queue_def_t* osal_queue_t; + +// role device/host is used by OS NONE for mutex (disable usb isr) only +#define OSAL_QUEUE_DEF(_role, _name, _depth, _type) \ + uint8_t _name##_buf[_depth*sizeof(_type)]; \ + osal_queue_def_t _name = { \ + .ff = TU_FIFO_INIT(_name##_buf, _depth, _type, false) \ + } + +// lock queue by disable USB interrupt +static inline void _osal_q_lock(osal_queue_t qhdl) +{ + critical_section_enter_blocking(&qhdl->critsec); +} + +// unlock queue +static inline void _osal_q_unlock(osal_queue_t qhdl) +{ + critical_section_exit(&qhdl->critsec); +} + +static inline osal_queue_t osal_queue_create(osal_queue_def_t* qdef) +{ + critical_section_init(&qdef->critsec); + tu_fifo_clear(&qdef->ff); + return (osal_queue_t) qdef; +} + +static inline bool osal_queue_receive(osal_queue_t qhdl, void* data) +{ + // TODO: revisit... docs say that mutexes are never used from IRQ context, + // however osal_queue_recieve may be. therefore my assumption is that + // the fifo mutex is not populated for queues used from an IRQ context + //assert(!qhdl->ff.mutex); + + _osal_q_lock(qhdl); + bool success = tu_fifo_read(&qhdl->ff, data); + _osal_q_unlock(qhdl); + + return success; +} + +static inline bool osal_queue_send(osal_queue_t qhdl, void const * data, bool in_isr) +{ + // TODO: revisit... docs say that mutexes are never used from IRQ context, + // however osal_queue_recieve may be. therefore my assumption is that + // the fifo mutex is not populated for queues used from an IRQ context + //assert(!qhdl->ff.mutex); + (void) in_isr; + + _osal_q_lock(qhdl); + bool success = tu_fifo_write(&qhdl->ff, data); + _osal_q_unlock(qhdl); + + TU_ASSERT(success); + + return success; +} + +static inline bool osal_queue_empty(osal_queue_t qhdl) +{ + // TODO: revisit; whether this is true or not currently, tu_fifo_empty is a single + // volatile read. + + // Skip queue lock/unlock since this function is primarily called + // with interrupt disabled before going into low power mode + return tu_fifo_empty(&qhdl->ff); +} + +#ifdef __cplusplus + } +#endif + +#endif /* _TUSB_OSAL_PICO_H_ */ |