/* eeprom.c */ /* asserv - Position & speed motor control on a ATmega128. {{{ * * Copyright (C) 2005 Nicolas Schodet * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * Contact : * Web: http://perso.efrei.fr/~schodet/ * Email: * }}} */ #include /* +AutoDec */ /* -AutoDec */ /* Read parameters from eeprom. */ static void eeprom_read_params (void) { uint8_t *p8 = 0; uint16_t *p16; if (eeprom_read_byte (p8++) != 0xa5) return; speed_acc_cpt = speed_acc = eeprom_read_byte (p8++); speed_max = eeprom_read_byte (p8++); pwm_dir = eeprom_read_byte (p8++); p16 = (uint16_t *) p8; speed_kp = eeprom_read_word (p16++); speed_ki = eeprom_read_word (p16++); speed_kd = eeprom_read_word (p16++); speed_int_max = eeprom_read_word (p16++); postrack_set_footing (eeprom_read_word (p16++)); } /* Write parameters to eeprom. */ static void eeprom_write_params (void) { uint8_t *p8 = 0; uint16_t *p16; eeprom_write_byte (p8++, 0xa5); eeprom_write_byte (p8++, speed_acc_cpt); eeprom_write_byte (p8++, speed_max); eeprom_write_byte (p8++, pwm_dir); p16 = (uint16_t *) p8; eeprom_write_word (p16++, speed_kp); eeprom_write_word (p16++, speed_ki); eeprom_write_word (p16++, speed_kd); eeprom_write_word (p16++, speed_int_max); eeprom_write_word (p16++, postrack_footing); } /* Clear eeprom parameters. */ static void eeprom_clear_params (void) { uint8_t *p = 0; eeprom_write_byte (p, 0xff); }