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eeprom.c
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eeprom.c
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/*
* eeprom.c
*
* Created on: 11 авг. 2016 г.
* Author: andru
*/
#include "ch.h"
#include "hal.h"
#include "eeprom.h"
#include "hal_eeprom.h"
#include "eeprom_conf.h"
#define EEPROM_ADDR 0b1010000
#define EEPROM_DRIVER I2CD2
#define EEPROM_PORT GPIOB
#define EEPROM_SCL GPIOB_PIN10
#define EEPROM_SDA GPIOB_PIN11
/* I2C2 */
static const I2CConfig EEPROMConfig = {
OPMODE_I2C,
100000,
STD_DUTY_CYCLE,
};
/* buffer for I2C read/write data */
static uint8_t eeprom_writebuf[EEPROM_PAGE_SIZE+2];
static I2CEepromFileStream efile;
static I2CEepromFileConfig efilecfg = {
0,
0,
EEPROM_SIZE,
EEPROM_PAGE_SIZE,
MS2ST(EEPROM_WRITE_TIME_MS),
&EEPROM_DRIVER,
EEPROM_ADDR,
eeprom_writebuf,
};
// init i2c driver for eeprom
void eepromInit(void) {
if (EEPROM_DRIVER.state < I2C_READY) {
i2cStart(&EEPROM_DRIVER, &EEPROMConfig);
/* tune pins for I2C2*/
palSetPadMode(EEPROM_PORT, EEPROM_SCL, PAL_MODE_STM32_ALTERNATE_OPENDRAIN);
palSetPadMode(EEPROM_PORT, EEPROM_SDA, PAL_MODE_STM32_ALTERNATE_OPENDRAIN);
}
}
void eepromStop(void) {
i2cStop(&EEPROM_DRIVER);
}
eeprom_error_t eepromRead(uint8_t *buf, uint16_t len) {
EepromFileStream *iefs;
efilecfg.barrier_low = EEPROM_AREA_START;
efilecfg.barrier_hi = EEPROM_AREA_SIZE;
iefs = I2CEepromFileOpen(&efile, &efilecfg, EepromFindDevice(EEPROM_DEVICE));
fileStreamSeek(iefs, 0);
if (0 != fileStreamGetPosition(iefs))
return EEPROM_ERR_SEEK;
uint8_t status = fileStreamRead(iefs, buf, len);
if (status != len)
return EEPROM_ERR_READ;
fileStreamClose(iefs);
return EEPROM_OK;
}
eeprom_error_t eepromWrite(uint8_t *buf, uint16_t len) {
EepromFileStream *oefs;
efilecfg.barrier_low = EEPROM_AREA_START;
efilecfg.barrier_hi = EEPROM_AREA_SIZE;
oefs = I2CEepromFileOpen(&efile, &efilecfg, EepromFindDevice(EEPROM_DEVICE));
fileStreamSeek(oefs, 0);
if (0 != fileStreamGetPosition(oefs))
return EEPROM_ERR_SEEK;
/* write */
uint8_t status = fileStreamWrite(oefs, buf, len);
if (status != len)
return EEPROM_ERR_WRITE;
/* check */
uint8_t pos = fileStreamGetPosition(oefs);
if (pos != len)
return EEPROM_ERR_WRITE;
fileStreamClose(oefs);
return EEPROM_OK;
}