42 lines
1.2 KiB
C
42 lines
1.2 KiB
C
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#ifndef INC_EEPROM_H_
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#define INC_EEPROM_H_
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#include "stm32f4xx_hal.h"
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#include "stm32f4xx_hal_def.h"
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#define EEPROM_BASE_ADDR 0b1010000
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// Device address must be shifted left before being passed to the HAL
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#define EEPROM_DEV_ADDR (EEPROM_BASE_ADDR << 1)
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#define EEPROM_TIMEOUT 200 /* ms */
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#define EEPROM_READ_TRIES 5
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#define EEPROM_ADDR_SLAVE_ID 0x000
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typedef enum { EEPROM_OFF, EEPROM_READY, EEPROM_ERROR } EEPROM_State;
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extern EEPROM_State eeprom_state;
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void eeprom_init(I2C_HandleTypeDef* handle);
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/**
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* @brief Write a byte to the EEPROM.
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*
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* @param addr 9-bit address (1 bit page select + 8 bit address)
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* @param data The byte to write
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*/
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HAL_StatusTypeDef eeprom_write(uint16_t addr, uint8_t data);
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/**
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* @brief Read a byte from the next address in the EEPROM.
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*
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* @param data 1-byte buffer into which the read byte is written.
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*/
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HAL_StatusTypeDef eeprom_read_curr(uint8_t* data);
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/**
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* @brief Read a byte from the EEPROM (random-access).
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*
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* @param addr 9-bit address (1 bit page select + 8 bit address)
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* @param data 1-byte buffer into which the read byte is written.
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*/
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HAL_StatusTypeDef eeprom_read_random(uint16_t addr, uint8_t* data);
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#endif // INC_EEPROM_H_
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