mirror of https://github.com/ArduPilot/ardupilot
51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
/*
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driver for RAMTRON FRAM persistent memory devices
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*/
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#pragma once
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#include <AP_Common/AP_Common.h>
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#include <AP_HAL/AP_HAL.h>
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class AP_RAMTRON {
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public:
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// initialise the driver
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// this will retry RAMTRON_RETRIES times until successful
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bool init(void);
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// get size in bytes
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uint32_t get_size(void) const { return (id == UINT8_MAX) ? 0 : ramtron_ids[id].size_kbyte * 1024UL; }
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// read from device
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// this will retry RAMTRON_RETRIES times until two successive reads return the same data
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bool read(uint32_t offset, uint8_t * const buf, uint32_t size);
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// write to device
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bool write(uint32_t offset, uint8_t const * const buf, uint32_t size);
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private:
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AP_HAL::OwnPtr<AP_HAL::SPIDevice> dev;
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enum class RDID_type :uint8_t {
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Cypress,
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Fujitsu,
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Petabytes
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};
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struct ramtron_id {
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uint8_t id1;
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uint8_t id2;
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uint16_t size_kbyte;
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uint8_t addrlen;
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RDID_type rdid_type;
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};
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static const struct ramtron_id ramtron_ids[];
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uint8_t id = UINT8_MAX;
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// perform a single device initialisation
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bool _init(void);
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// perform a single device read
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bool _read(uint32_t offset, uint8_t * const buf, uint32_t size);
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void send_offset(uint8_t cmd, uint32_t offset) const;
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};
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