mirror of https://github.com/ArduPilot/ardupilot
146 lines
4.6 KiB
C++
146 lines
4.6 KiB
C++
/*
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* This file is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This file is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* Author: Oliver Walters
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*/
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#pragma once
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#include <AP_HAL/AP_HAL.h>
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#include <AP_CANManager/AP_CANDriver.h>
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#include <AP_HAL/Semaphores.h>
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#include <AP_Param/AP_Param.h>
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#include "piccolo_protocol/ESCPackets.h"
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// maximum number of ESC allowed on CAN bus simultaneously
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#define PICCOLO_CAN_MAX_NUM_ESC 12
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#define PICCOLO_CAN_MAX_GROUP_ESC (PICCOLO_CAN_MAX_NUM_ESC / 4)
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#ifndef HAL_PICCOLO_CAN_ENABLE
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#define HAL_PICCOLO_CAN_ENABLE (HAL_NUM_CAN_IFACES && !HAL_MINIMIZE_FEATURES)
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#endif
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#if HAL_PICCOLO_CAN_ENABLE
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#define PICCOLO_MSG_RATE_HZ_MIN 1
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#define PICCOLO_MSG_RATE_HZ_MAX 500
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#define PICCOLO_MSG_RATE_HZ_DEFAULT 50
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class AP_PiccoloCAN : public AP_CANDriver
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{
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public:
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AP_PiccoloCAN();
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~AP_PiccoloCAN();
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// Piccolo message groups form part of the CAN ID of each frame
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enum class MessageGroup : uint8_t {
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SIMULATOR = 0x00, // Simulator messages
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SENSOR = 0x04, // External sensors
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ACTUATOR = 0x07, // Actuators (e.g. ESC / servo)
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ECU_OUT = 0x08, // Messages *from* an ECU
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ECU_IN = 0x09, // Message *to* an ECU
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SYSTEM = 0x19, // System messages (e.g. bootloader)
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};
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// Piccolo actuator types differentiate between actuator frames
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enum class ActuatorType : uint8_t {
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SERVO = 0x00,
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ESC = 0x20,
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};
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/* Do not allow copies */
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AP_PiccoloCAN(const AP_PiccoloCAN &other) = delete;
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AP_PiccoloCAN &operator=(const AP_PiccoloCAN&) = delete;
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static const struct AP_Param::GroupInfo var_info[];
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// Return PiccoloCAN from @driver_index or nullptr if it's not ready or doesn't exist
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static AP_PiccoloCAN *get_pcan(uint8_t driver_index);
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// initialize PiccoloCAN bus
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void init(uint8_t driver_index, bool enable_filters) override;
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bool add_interface(AP_HAL::CANIface* can_iface) override;
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// called from SRV_Channels
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void update();
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// send ESC telemetry messages over MAVLink
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void send_esc_telemetry_mavlink(uint8_t mav_chan);
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// return true if a particular ESC is 'active' on the Piccolo interface
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bool is_esc_channel_active(uint8_t chan);
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// return true if a particular ESC has been detected
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bool is_esc_present(uint8_t chan, uint64_t timeout_ms = 2000);
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// return true if a particular ESC is enabled
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bool is_esc_enabled(uint8_t chan);
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// test if the Piccolo CAN driver is ready to be armed
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bool pre_arm_check(char* reason, uint8_t reason_len);
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private:
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// loop to send output to ESCs in background thread
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void loop();
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// write frame on CAN bus, returns true on success
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bool write_frame(AP_HAL::CANFrame &out_frame, uint64_t timeout);
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// read frame on CAN bus, returns true on succses
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bool read_frame(AP_HAL::CANFrame &recv_frame, uint64_t timeout);
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// send ESC commands over CAN
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void send_esc_messages(void);
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// interpret an ESC message received over CAN
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bool handle_esc_message(AP_HAL::CANFrame &frame);
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bool _initialized;
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char _thread_name[16];
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uint8_t _driver_index;
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AP_HAL::CANIface* _can_iface;
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HAL_EventHandle _event_handle;
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HAL_Semaphore _telem_sem;
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struct PiccoloESC_Info_t {
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// ESC telemetry information
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ESC_StatusA_t statusA; //! Telemetry data
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ESC_StatusB_t statusB; //! Telemetry data
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ESC_Firmware_t firmware; //! Firmware / checksum information
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ESC_Address_t address; //! Serial number
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ESC_EEPROMSettings_t eeprom; //! Non-volatile settings info
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// Output information
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int16_t command; //! Raw command to send to each ESC
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bool newCommand; //! Is the command "new"?
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bool newTelemetry; //! Is there new telemetry data available?
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uint64_t last_rx_msg_timestamp = 0; //! Time of most recently received message
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} _esc_info[PICCOLO_CAN_MAX_NUM_ESC];
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// Piccolo CAN parameters
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AP_Int32 _esc_bm; //! ESC selection bitmask
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AP_Int16 _esc_hz; //! ESC update rate (Hz)
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};
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#endif // HAL_PICCOLO_CAN_ENABLE
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