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85 lines
2.7 KiB
85 lines
2.7 KiB
/* |
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* Copyright (C) 2015-2016 Intel Corporation. All rights reserved. |
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* |
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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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#pragma once |
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#include <inttypes.h> |
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#include "AP_HAL_Namespace.h" |
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#include "Device.h" |
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#include "utility/OwnPtr.h" |
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namespace AP_HAL { |
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class SPIDevice : public Device { |
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public: |
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SPIDevice() : Device(BUS_TYPE_SPI) { } |
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virtual ~SPIDevice() { } |
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/* Device implementation */ |
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/* See Device::set_speed() */ |
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virtual bool set_speed(Device::Speed speed) override = 0; |
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/* See Device::transfer() */ |
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virtual bool transfer(const uint8_t *send, uint32_t send_len, |
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uint8_t *recv, uint32_t recv_len) override = 0; |
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/* |
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* Like #transfer(), but both @send and @recv buffers are transmitted at |
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* the same time: because of this they need to be of the same size. |
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*/ |
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virtual bool transfer_fullduplex(const uint8_t *send, uint8_t *recv, |
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uint32_t len) = 0; |
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/* |
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* send N bytes of clock pulses without taking CS. This is used |
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* when initialising microSD interfaces over SPI |
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*/ |
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virtual bool clock_pulse(uint32_t len) { return false; } |
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/* See Device::get_semaphore() */ |
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virtual Semaphore *get_semaphore() override = 0; |
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/* See Device::register_periodic_callback() */ |
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virtual Device::PeriodicHandle register_periodic_callback( |
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uint32_t period_usec, Device::PeriodicCb) override = 0; |
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/* See Device::adjust_periodic_callback() */ |
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virtual bool adjust_periodic_callback( |
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PeriodicHandle h, uint32_t period_usec) override { return false; } |
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// setup a bus clock slowdown factor (optional interface) |
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virtual void set_slowdown(uint8_t slowdown) {} |
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}; |
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class SPIDeviceManager { |
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public: |
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virtual OwnPtr<SPIDevice> get_device(const char *name) |
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{ |
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return nullptr; |
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} |
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/* Return the number of SPI devices currently registered. */ |
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virtual uint8_t get_count() { return 0; } |
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/* Get spi device name at @idx */ |
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virtual const char *get_device_name(uint8_t idx) { return nullptr; } |
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virtual void set_register_rw_callback(const char* name, AP_HAL::Device::RegisterRWCb cb) {} |
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}; |
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}
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