353 lines
9.2 KiB
C
353 lines
9.2 KiB
C
/****************************************************************************
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* examples/nrf24l01_term/nrf24l01_term.c
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*
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* Copyright (C) 2013 Laurent Latil. All rights reserved.
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* Author: Laurent Latil <laurent@latil.nom.fr>
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*
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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
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* are met:
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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <unistd.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <debug.h>
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#include <poll.h>
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#include <fcntl.h>
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#include <nuttx/wireless/nrf24l01.h>
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#include "system/readline.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define DEV_NAME "/dev/nrf24l01"
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#ifndef STDIN_FILENO
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# define STDIN_FILENO 0
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#endif
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#define DEFAULT_RADIOFREQ 2450
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#define DEFAULT_TXPOWER -6 /* (0, -6, -12, or -18 dBm) */
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#ifdef CONFIG_WL_NRF24L01_RXSUPPORT
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# define N_PFDS 2 /* If RX support is enabled, poll both stdin and the message reception */
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#else
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# define N_PFDS 1 /* If RX support is not enabled, we cannot poll the wireless device */
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#endif
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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int wireless_cfg(int fd);
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int wireless_open(void);
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int send_pkt(int wl_fd);
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int read_pkt(int wl_fd);
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void usage(void);
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static const uint8_t defaultaddr[NRF24L01_MAX_ADDR_LEN] = { 0x01, 0xCA, 0xFE, 0x12, 0x34};
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char buff[NRF24L01_MAX_PAYLOAD_LEN + 1] = "";
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/* polled file descr */
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static struct pollfd pfds[N_PFDS];
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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int wireless_cfg(int fd)
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{
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int error = 0;
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uint32_t rf = DEFAULT_RADIOFREQ;
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int32_t txpow = DEFAULT_TXPOWER;
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nrf24l01_datarate_t datarate = RATE_1Mbps;
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nrf24l01_retrcfg_t retrcfg =
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{
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.count = 5,
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.delay = DELAY_1000us
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};
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uint32_t addrwidth = NRF24L01_MAX_ADDR_LEN;
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uint8_t pipes_en = (1 << 0); /* Only pipe #0 is enabled */
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nrf24l01_pipecfg_t pipe0cfg;
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nrf24l01_pipecfg_t *pipes_cfg[NRF24L01_PIPE_COUNT] = {&pipe0cfg, 0, 0, 0, 0, 0};
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nrf24l01_state_t primrxstate;
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#ifdef CONFIG_WL_NRF24L01_RXSUPPORT
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primrxstate = ST_RX;
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#else
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primrxstate = ST_POWER_DOWN;
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#endif
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/* Define the pipe #0 parameters (AA enabled, and dynamic payload length) */
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pipe0cfg.en_aa = true;
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pipe0cfg.payload_length = NRF24L01_DYN_LENGTH;
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memcpy (pipe0cfg.rx_addr, defaultaddr, NRF24L01_MAX_ADDR_LEN);
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/* Set radio parameters */
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ioctl(fd, WLIOC_SETRADIOFREQ, (unsigned long)((uint32_t *)&rf));
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ioctl(fd, WLIOC_SETTXPOWER, (unsigned long)((int32_t *)&txpow));
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ioctl(fd, NRF24L01IOC_SETDATARATE, (unsigned long)((nrf24l01_datarate_t *)&datarate));
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ioctl(fd, NRF24L01IOC_SETRETRCFG, (unsigned long)((nrf24l01_retrcfg_t *)&retrcfg));
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ioctl(fd, NRF24L01IOC_SETADDRWIDTH, (unsigned long)((uint32_t*) &addrwidth));
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ioctl(fd, NRF24L01IOC_SETTXADDR, (unsigned long)((uint8_t *)&defaultaddr));
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ioctl(fd, NRF24L01IOC_SETPIPESCFG, (unsigned long)((nrf24l01_pipecfg_t **)&pipes_cfg));
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ioctl(fd, NRF24L01IOC_SETPIPESENABLED, (unsigned long)((uint8_t *)&pipes_en));
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/* Enable receiver */
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ioctl(fd, NRF24L01IOC_SETSTATE, (unsigned long)((nrf24l01_state_t *)&primrxstate));
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return error;
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}
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int wireless_open(void)
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{
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int fd;
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fd = open(DEV_NAME, O_RDWR);
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if (fd < 0)
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{
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perror("Cannot open nRF24L01 device");
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}
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else
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{
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wireless_cfg(fd);
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}
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return fd;
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}
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int send_pkt(int wl_fd)
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{
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int ret;
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int len;
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/* Remove carriage return */
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len = strlen(buff);
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if (len > 0 && buff[len - 1] == '\n')
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{
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len --;
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buff[len] = '\0';
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}
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ret = write(wl_fd, buff, len);
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if (ret < 0)
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{
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perror("Error sending packet");
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return ret;
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}
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else
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{
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int retrcount;
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ioctl(wl_fd, NRF24L01IOC_GETLASTXMITCOUNT, (unsigned long)((uint32_t *)&retrcount));
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printf("Packet sent successfully ! (%d retransmitted packets)\n", retrcount);
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}
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return OK;
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}
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int read_pkt(int wl_fd)
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{
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int ret;
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uint32_t pipeno;
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ret = read(wl_fd, buff, sizeof(buff));
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if (ret < 0)
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{
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perror("Error reading packet\n");
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return ret;
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}
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if (ret == 0)
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{
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/* Should not happen ... */
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printf("Packet payload empty !\n");
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return ERROR;
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}
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/* Get the recipient pipe # (for demo purpose, as here the receiving pipe can only be pipe #0...) */
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ioctl(wl_fd, NRF24L01IOC_GETLASTPIPENO, (unsigned long)((uint32_t *)&pipeno));
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buff[ret] = '\0'; /* end the string */
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printf("Message received : %s (on pipe #%d)\n", buff, pipeno);
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return 0;
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}
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void usage(void)
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{
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printf("nRF24L01+ wireless terminal demo.\nUsage:\n");
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printf("- Type in any message ( <= 32 char length) to send it to communication peer.\n");
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printf("- Ctrl-C to exit.\n\n");
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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int main(int argc, FAR char *argv[])
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{
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int ret;
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bool quit = false;
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int wl_fd;
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wl_fd = wireless_open();
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if (wl_fd < 0)
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{
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return -1;
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}
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usage();
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pfds[0].fd = STDIN_FILENO;
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pfds[0].events = POLLIN;
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#ifdef CONFIG_WL_NRF24L01_RXSUPPORT
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pfds[1].fd = wl_fd;
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pfds[1].events = POLLIN;
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#endif
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while (!quit)
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{
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ret = poll(pfds, N_PFDS, -1);
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if (ret < 0)
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{
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perror("Error polling console / wireless");
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goto out;
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}
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if (pfds[0].revents & POLLIN)
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{
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char c;
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read(STDIN_FILENO, &c, 1);
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if (c < ' ')
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{
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/* Any non printable char -> exits */
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quit = true;
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}
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else
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{
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printf("Message to send > %c", c);
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fflush(stdout);
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/* Prepend the initial character */
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buff[0] = c;
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#ifndef CONFIG_SYSTEM_READLINE
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/* Use fgets if readline utility method is not enabled */
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if (fgets(&buff[1], sizeof(buff) - 1, stdin) == NULL)
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{
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printf("ERROR: fgets failed: %d\n", errno);
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goto out;
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}
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#else
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ret = readline(&buff[1], sizeof(buff) - 1, stdin, stdout);
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/* Readline normally returns the number of characters read,
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* but will return EOF on end of file or if an error occurs. Either
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* will cause the session to terminate.
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*/
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if (ret == EOF)
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{
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printf("ERROR: readline failed: %d\n", ret);
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goto out;
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}
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#endif
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/* Send content */
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send_pkt(wl_fd);
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}
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}
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#ifdef CONFIG_WL_NRF24L01_RXSUPPORT
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if (!quit && (pfds[1].revents & POLLIN))
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{
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read_pkt(wl_fd);
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}
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#endif
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}
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out:
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close(wl_fd);
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printf ("Bye !\n");
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return 0;
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}
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