atcmd_pon.c

/****************************************************************************
 * external/services/atcmd/atcmd_pon.c
 * AT cmd pon services
 *
 *   Copyright (C) 2021 Fishsemi Inc. 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 NuttX 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 OWNER 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.
 *
 ****************************************************************************/

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>

#include <stdio.h>
#include <string.h>

#include "atcmd.h"

# define getreg32(a)          (*(volatile uint32_t *)(a))
# define putreg32(v,a)        (*(volatile uint32_t *)(a) = (v))
# define GPIO_BASE            ( 0xb0060000 )
# define GPIO_PON_OFFSET      ( 0x84 )
# define PON_MASK             ( 0x400 )

/****************************************************************************
 * Public Funtions
 ****************************************************************************/

void atcmd_pon_handler(int fd, const char *cmd, char *param)
{
  char *str = param;
  uint32_t ret;

  str += strlen("at+pon");
  if (*str != '?')
    {
      goto out;
    }

  ret = getreg32(GPIO_BASE + GPIO_PON_OFFSET) & PON_MASK;
  dprintf(fd, "\r\n%d\r\n", ret >0 ? true : false);

out:
  dprintf(fd, "\r\n%s\r\n", ret >=0 ? "OK" : "ERROR");
}