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49 lines
1.3 KiB
49 lines
1.3 KiB
/* |
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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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}; |
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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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