/// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
/*
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
/*
 *   AP_BoardConfig - board specific configuration
 */


#include <AP_HAL.h>
#include <AP_Common.h>
#include <AP_BoardConfig.h>

#if CONFIG_HAL_BOARD == HAL_BOARD_PX4
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <drivers/drv_pwm_output.h>

#ifdef CONFIG_ARCH_BOARD_PX4FMU_V1
#define BOARD_PWM_COUNT_DEFAULT 2
#define BOARD_SER1_RTSCTS_DEFAULT 0 // no flow control on UART5 on FMUv1
#else
#define BOARD_PWM_COUNT_DEFAULT 4
#define BOARD_SER1_RTSCTS_DEFAULT 2
#endif
#endif

extern const AP_HAL::HAL& hal;

// table of user settable parameters
const AP_Param::GroupInfo AP_BoardConfig::var_info[] PROGMEM = {
#if CONFIG_HAL_BOARD == HAL_BOARD_PX4
    // @Param: PWM_COUNT
    // @DisplayName: PWM Count
    // @Description: Number of auxillary PWMs to enable. On PX4v1 only 0 or 2 is valid. On Pixhawk 0, 2, 4 or 6 is valid.
    // @Values: 0:No PWMs,2:Two PWMs,4:Four PWMs,6:Six PWMs
    AP_GROUPINFO("PWM_COUNT",    0, AP_BoardConfig, _pwm_count, BOARD_PWM_COUNT_DEFAULT),

    // @Param: SER1_RTSCTS
    // @DisplayName: Serial 1 flow control
    // @Description: Enable flow control on serial 1 (telemetry 1) on Pixhawk. You must have the RTS and CTS pins connected to your radio. The standard DF13 6 pin connector for a 3DR radio does have those pins connected. If this is set to 2 then flow control will be auto-detected by checking for the output buffer filling on startup. Note that the PX4v1 does not have hardware flow control pins on this port, so you should leave this disabled.
    // @Values: 0:Disabled,1:Enabled,2:Auto
    AP_GROUPINFO("SER1_RTSCTS",    1, AP_BoardConfig, _ser1_rtscts, BOARD_SER1_RTSCTS_DEFAULT),

    // @Param: SER2_RTSCTS
    // @DisplayName: Serial 2 flow control
    // @Description: Enable flow control on serial 2 (telemetry 2) on Pixhawk and PX4. You must have the RTS and CTS pins connected to your radio. The standard DF13 6 pin connector for a 3DR radio does have those pins connected. If this is set to 2 then flow control will be auto-detected by checking for the output buffer filling on startup.
    // @Values: 0:Disabled,1:Enabled,2:Auto
    AP_GROUPINFO("SER2_RTSCTS",    2, AP_BoardConfig, _ser2_rtscts, 2),

    // @Param: SAFETYENABLE
    // @DisplayName:  Enable use of safety arming switch
    // @Description: Disabling this option will disable the use of the safety switch on PX4 for arming. Use of the safety switch is highly recommended, so you should leave this option set to 1 except in unusual circumstances.
    // @Values: 0:Disabled,1:Enabled
    AP_GROUPINFO("SAFETYENABLE",   3, AP_BoardConfig, _safety_enable, 1),
#endif

    AP_GROUPEND
};

void AP_BoardConfig::init()
{
#if CONFIG_HAL_BOARD == HAL_BOARD_PX4
    /* configurre the FMU driver for the right number of PWMs */

    // ensure only valid values are set, rounding up
    if (_pwm_count > 6) _pwm_count.set(6);
    if (_pwm_count < 0) _pwm_count.set(0);
    if (_pwm_count == 1) _pwm_count.set(2);
    if (_pwm_count == 3) _pwm_count.set(4);
    if (_pwm_count == 5) _pwm_count.set(6);

    int fd = open("/dev/px4fmu", 0);
    if (fd == -1) {
        hal.scheduler->panic("Unable to open /dev/px4fmu");
    }
    if (ioctl(fd, PWM_SERVO_SET_COUNT, _pwm_count.get()) != 0) {
        hal.console->printf("RCOutput: Unable to setup alt PWM to %u channels\n", _pwm_count.get());  
    }   
    close(fd);

    hal.uartC->set_flow_control((AP_HAL::UARTDriver::flow_control)_ser1_rtscts.get());
    if (hal.uartD != NULL) {
        hal.uartD->set_flow_control((AP_HAL::UARTDriver::flow_control)_ser2_rtscts.get());
    }

    if (_safety_enable.get() == 0) {
        hal.rcout->force_safety_off();
    }
#endif    
}