nes-proj/arch/cpu/simplelink-cc13xx-cc26xx/rf/data-queue.c
2018-08-31 11:06:31 +02:00

162 lines
5.8 KiB
C

/*
* Copyright (c) 2018, Texas Instruments Incorporated - http://www.ti.com/
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* \addtogroup cc13xx-cc26xx-rf-data-queue
* @{
*
* \file
* Implementation of the CC13xx/CC26xx RF data queue.
* \author
* Edvard Pettersen <e.pettersen@ti.com>
*/
/*---------------------------------------------------------------------------*/
#include "contiki.h"
#include "sys/cc.h"
/*---------------------------------------------------------------------------*/
#include <ti/devices/DeviceFamily.h>
#include DeviceFamily_constructPath(driverlib/rf_mailbox.h)
#include DeviceFamily_constructPath(driverlib/rf_data_entry.h)
/*---------------------------------------------------------------------------*/
#include "rf/data-queue.h"
/*---------------------------------------------------------------------------*/
#include <stddef.h>
#include <stdint.h>
#include <string.h>
/*---------------------------------------------------------------------------*/
/* RX buf configuration */
#define RX_BUF_CNT RF_CONF_RX_BUF_CNT
#define RX_BUF_SIZE RF_CONF_RX_BUF_SIZE
/*---------------------------------------------------------------------------*/
/* Receive buffer entries with room for 1 IEEE 802.15.4 frame in each */
typedef union {
data_entry_t data_entry;
uint8_t buf[RX_BUF_SIZE];
} rx_buf_t CC_ALIGN (4);
/*---------------------------------------------------------------------------*/
typedef struct {
/* RX bufs */
rx_buf_t bufs[RX_BUF_CNT];
/* RFC data queue object */
data_queue_t data_queue;
/* Current data entry in use by RF */
data_entry_t *curr_entry;
/* Size in bytes of length field in data entry */
size_t lensz;
} rx_data_queue_t;
static rx_data_queue_t rx_data_queue;
/*---------------------------------------------------------------------------*/
static void
rx_bufs_init(void)
{
data_entry_t *data_entry;
size_t i;
for(i = 0; i < RX_BUF_CNT; ++i) {
data_entry = &(rx_data_queue.bufs[i].data_entry);
data_entry->status = DATA_ENTRY_PENDING;
data_entry->config.type = DATA_ENTRY_TYPE_GEN;
data_entry->config.lenSz = rx_data_queue.lensz;
data_entry->length = RX_BUF_SIZE - sizeof(data_entry_t);
/* Point to fist entry if this is last entry, else point to next entry */
data_entry->pNextEntry = ((i + 1) == RX_BUF_CNT)
? rx_data_queue.bufs[0].buf
: rx_data_queue.bufs[i + 1].buf;
}
}
/*---------------------------------------------------------------------------*/
static void
rx_bufs_reset(void)
{
size_t i;
for(i = 0; i < RX_BUF_CNT; ++i) {
data_entry_t *const data_entry = &(rx_data_queue.bufs[i].data_entry);
/* Clear length bytes */
memset(&(data_entry->data), 0x0, rx_data_queue.lensz);
/* Set status to Pending */
data_entry->status = DATA_ENTRY_PENDING;
}
}
/*---------------------------------------------------------------------------*/
data_queue_t *
data_queue_init(size_t lensz)
{
rx_data_queue.lensz = lensz;
/* Initialize RX buffers */
rx_bufs_init();
/* Configure data queue as circular buffer */
rx_data_queue.data_queue.pCurrEntry = rx_data_queue.bufs[0].buf;
rx_data_queue.data_queue.pLastEntry = NULL;
/* Set current read pointer to first element */
rx_data_queue.curr_entry = &(rx_data_queue.bufs[0].data_entry);
return &rx_data_queue.data_queue;
}
/*---------------------------------------------------------------------------*/
void
data_queue_reset(void)
{
rx_bufs_reset();
/* Only need to reconfigure pCurrEntry */
rx_data_queue.data_queue.pCurrEntry = rx_data_queue.bufs[0].buf;
/* Set current read pointer to first element */
rx_data_queue.curr_entry = &(rx_data_queue.bufs[0].data_entry);
}
/*---------------------------------------------------------------------------*/
data_entry_t *
data_queue_current_entry(void)
{
return rx_data_queue.curr_entry;
}
/*---------------------------------------------------------------------------*/
void
data_queue_release_entry(void)
{
data_entry_t *const curr_entry = rx_data_queue.curr_entry;
uint8_t *const frame_ptr = (uint8_t *)&(curr_entry->data);
/* Clear length bytes */
memset(frame_ptr, 0x0, rx_data_queue.lensz);
/* Set status to Pending */
curr_entry->status = DATA_ENTRY_PENDING;
/* Move current entry to the next entry */
rx_data_queue.curr_entry = (data_entry_t *)(curr_entry->pNextEntry);
}
/*---------------------------------------------------------------------------*/
/** @} */