/**
* @brief EEPROM write routine.
* @details Function writes data to EEPROM.
* @pre Data must be fit to single EEPROM page.
*
* @param[in] eepcfg pointer to configuration structure of eeprom file
* @param[in] offset addres of 1-st byte to be write
* @param[in] data pointer to buffer with data to be written
* @param[in] len number of bytes to be written
*/
static msg_t eeprom_write(const I2CEepromFileConfig *eepcfg, uint32_t offset,
const uint8_t *data, size_t len) {
msg_t status = RDY_RESET;
systime_t tmo = calc_timeout(eepcfg->i2cp, (len + 2), 0);
chDbgCheck(((len <= eepcfg->size) && ((offset + len) <= eepcfg->size)),
"out of device bounds");
chDbgCheck((((offset + eepcfg->barrier_low) / eepcfg->pagesize) ==
(((offset + eepcfg->barrier_low) + len - 1) / eepcfg->pagesize)),
"data can not be fitted in single page");
/* write address bytes */
eeprom_split_addr(eepcfg->write_buf, (offset + eepcfg->barrier_low));
/* write data bytes */
memcpy(&(eepcfg->write_buf[2]), data, len);
#if I2C_USE_MUTUAL_EXCLUSION
i2cAcquireBus(eepcfg->i2cp);
#endif
status = i2cMasterTransmitTimeout(eepcfg->i2cp, eepcfg->addr,
eepcfg->write_buf, (len + 2), NULL, 0, tmo);
#if I2C_USE_MUTUAL_EXCLUSION
i2cReleaseBus(eepcfg->i2cp);
#endif
/* wait until EEPROM process data */
chThdSleep(eepcfg->write_time);
return status;
}
/**
* @brief EEPROM read routine.
*
* @param[in] addr addres of 1-st byte to be read
* @param[in] len number of bytes to be write
* @param[in] ext_rxbuf pointer to data buffer
*/
msg_t eeprom_read(uint32_t addr, uint8_t *buf, size_t len){
msg_t status = RDY_OK;
chBSemWait(&eeprom_sem);
chDbgCheck(((len <= EEPROM_SIZE) && ((addr+len) <= EEPROM_SIZE)),
"requested data out of device bounds");
eeprom_split_addr(localtxbuf, addr); /* write address bytes */
i2c_transmit(eeprom_i2caddr, localtxbuf, 2, buf, len);
chBSemSignal(&eeprom_sem);
return status;
}
/**
* @brief EEPROM write routine.
* @details Function writes data to EEPROM.
* @pre Data must be fit to single EEPROM page.
*
* @param[in] addr addres of 1-st byte to be write
* @param[in] buf pointer to data
* @param[in] len number of bytes to be written
*/
msg_t eeprom_write(uint32_t addr, const uint8_t *buf, size_t len){
msg_t status = RDY_OK;
chBSemWait(&eeprom_sem);
chDbgCheck(((len <= EEPROM_SIZE) && ((addr+len) <= EEPROM_SIZE)),
"data can not be fitted in device");
chDbgCheck(((addr / EEPROM_PAGE_SIZE) == ((addr + len - 1) / EEPROM_PAGE_SIZE)),
"data can not be fitted in single page");
eeprom_split_addr(localtxbuf, addr); /* write address bytes */
memcpy(&(localtxbuf[2]), buf, len); /* write data bytes */
i2c_transmit(eeprom_i2caddr, localtxbuf, (len + 2), NULL, 0);
/* wait until EEPROM process data */
chThdSleepMilliseconds(EEPROM_WRITE_TIME);
chBSemSignal(&eeprom_sem);
return status;
}
/**
* @brief EEPROM read routine.
*
* @param[in] eepcfg pointer to configuration structure of eeprom file
* @param[in] offset addres of 1-st byte to be read
* @param[in] data pointer to buffer with data to be written
* @param[in] len number of bytes to be red
*/
static msg_t eeprom_read(const I2CEepromFileConfig *eepcfg,
uint32_t offset, uint8_t *data, size_t len) {
msg_t status = RDY_RESET;
systime_t tmo = calc_timeout(eepcfg->i2cp, 2, len);
chDbgCheck(((len <= eepcfg->size) && ((offset + len) <= eepcfg->size)),
"out of device bounds");
eeprom_split_addr(eepcfg->write_buf, (offset + eepcfg->barrier_low));
#if I2C_USE_MUTUAL_EXCLUSION
i2cAcquireBus(eepcfg->i2cp);
#endif
status = i2cMasterTransmitTimeout(eepcfg->i2cp, eepcfg->addr,
eepcfg->write_buf, 2, data, len, tmo);
#if I2C_USE_MUTUAL_EXCLUSION
i2cReleaseBus(eepcfg->i2cp);
#endif
return status;
}
