Driver for reading and writing data to external I2C EEPROMs.
License: GNU General Public License v3.0
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uint8_t eeprom_read_byte(uint8_t deviceaddress, uint16_t eeaddress) {
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
i2c_master_write_byte(cmd, (deviceaddress<<1)|EEPROM_WRITE_ADDR, 1);
i2c_master_write_byte(cmd, eeaddress<<8, 1); --> *1
i2c_master_write_byte(cmd, eeaddress&0xFF, 1);
i2c_master_start(cmd);
i2c_master_write_byte(cmd, (deviceaddress<<1)|EEPROM_READ_ADDR, 1);
uint8_t data;
i2c_master_read_byte(cmd, &data, 1);
i2c_master_stop(cmd);
i2c_master_cmd_begin(I2C_NUM_1, cmd, 1000/portTICK_PERIOD_MS);
i2c_cmd_link_delete(cmd);
return data;
}
*1
i2c_master_write_byte(cmd, eeaddress>>8, 1);
Please confirm.
in function eeprom_write() the i2c is not closed at if condition.
if (bytes_remaining <= first_write_size) {
i2c_master_write(cmd, data, bytes_remaining, 1);
}
recomended fix :
if (bytes_remaining <= first_write_size) {
i2c_master_write(cmd, data, bytes_remaining, 1);
i2c_master_stop(cmd);
ret = i2c_master_cmd_begin(I2C_NUM_1, cmd, 1000/portTICK_PERIOD_MS);
i2c_cmd_link_delete(cmd);
if (ret != ESP_OK) return ret;
}
Which license applies for this work?
If no license is given, noone has any rights to use it.
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