Valentin Ivanov / RetroPlatform

Platform library for RETRO

Dependents:   RETRO_RickGame

Utils.cpp@0:6f26c31d8573, 2015-03-01 (annotated)

Committer:
Architect
Date:
Sun Mar 01 05:29:45 2015 +0000
Revision:
0:6f26c31d8573
RetroPlatform Library for RETRO gaming system

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Architect 0:6f26c31d8573 1 /*
Architect 0:6f26c31d8573 2 * (C) Copyright 2015 Valentin Ivanov. All rights reserved.
Architect 0:6f26c31d8573 3 *
Architect 0:6f26c31d8573 4 * This file is part of the RetroPlatform Library
Architect 0:6f26c31d8573 5 *
Architect 0:6f26c31d8573 6 * The RetroPlatform Library is free software: you can redistribute it and/or modify
Architect 0:6f26c31d8573 7 * it under the terms of the GNU Lesser General Public License as published by
Architect 0:6f26c31d8573 8 * the Free Software Foundation, either version 3 of the License, or
Architect 0:6f26c31d8573 9 * (at your option) any later version.
Architect 0:6f26c31d8573 10 *
Architect 0:6f26c31d8573 11 * This program is distributed in the hope that it will be useful,
Architect 0:6f26c31d8573 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
Architect 0:6f26c31d8573 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
Architect 0:6f26c31d8573 14 * GNU Lesser General Public License for more details.
Architect 0:6f26c31d8573 15 *
Architect 0:6f26c31d8573 16 * You should have received a copy of the GNU Lesser General Public License
Architect 0:6f26c31d8573 17 * along with this program. If not, see <http://www.gnu.org/licenses/>
Architect 0:6f26c31d8573 18 *
Architect 0:6f26c31d8573 19 * This library is inspired by Gamebuino Library (http://gamebuino.com)
Architect 0:6f26c31d8573 20 * from Aurélien Rodot.
Architect 0:6f26c31d8573 21 */
Architect 0:6f26c31d8573 22 #include "mbed.h"
Architect 0:6f26c31d8573 23 #include "Utils.h"
Architect 0:6f26c31d8573 24
Architect 0:6f26c31d8573 25 uint8_t constrain(uint8_t val, uint8_t minimum, uint8_t maximum )
Architect 0:6f26c31d8573 26 {
Architect 0:6f26c31d8573 27 if( val < minimum )
Architect 0:6f26c31d8573 28 return minimum;
Architect 0:6f26c31d8573 29 if( val > maximum )
Architect 0:6f26c31d8573 30 return maximum;
Architect 0:6f26c31d8573 31
Architect 0:6f26c31d8573 32 return val;
Architect 0:6f26c31d8573 33 }
Architect 0:6f26c31d8573 34
Architect 0:6f26c31d8573 35 uint8_t max(uint8_t val1, uint8_t val2 )
Architect 0:6f26c31d8573 36 {
Architect 0:6f26c31d8573 37 if( val1 < val2 )
Architect 0:6f26c31d8573 38 return val2;
Architect 0:6f26c31d8573 39
Architect 0:6f26c31d8573 40 return val1;
Architect 0:6f26c31d8573 41 }
Architect 0:6f26c31d8573 42
Architect 0:6f26c31d8573 43 uint8_t min(uint8_t val1, uint8_t val2 )
Architect 0:6f26c31d8573 44 {
Architect 0:6f26c31d8573 45 if( val1 < val2 )
Architect 0:6f26c31d8573 46 return val1;
Architect 0:6f26c31d8573 47
Architect 0:6f26c31d8573 48 return val2;
Architect 0:6f26c31d8573 49 }
Architect 0:6f26c31d8573 50
Architect 0:6f26c31d8573 51 #define IAP_LOCATION 0x1fff1ff1
Architect 0:6f26c31d8573 52 typedef void (*IAP_call)(unsigned int [], unsigned int []);
Architect 0:6f26c31d8573 53
Architect 0:6f26c31d8573 54 IAP_call iap_entry = reinterpret_cast<IAP_call>(IAP_LOCATION);
Architect 0:6f26c31d8573 55 unsigned int IAP_command[ 5 ];
Architect 0:6f26c31d8573 56 unsigned int IAP_result[ 5 ];
Architect 0:6f26c31d8573 57
Architect 0:6f26c31d8573 58 int write_eeprom( char *source_addr, char *target_addr, int size )
Architect 0:6f26c31d8573 59 {
Architect 0:6f26c31d8573 60 IAP_command[ 0 ] = 61;
Architect 0:6f26c31d8573 61 IAP_command[ 1 ] = (unsigned int)target_addr; // Destination EEPROM address where data bytes are to be written. This address should be a 256 byte boundary.
Architect 0:6f26c31d8573 62 IAP_command[ 2 ] = (unsigned int)source_addr; // Source RAM address from which data bytes are to be read. This address should be a word boundary.
Architect 0:6f26c31d8573 63 IAP_command[ 3 ] = size; // Number of bytes to be written. Should be 256 | 512 | 1024 | 4096.
Architect 0:6f26c31d8573 64 IAP_command[ 4 ] = SystemCoreClock / 1000; // CPU Clock Frequency (CCLK) in kHz.
Architect 0:6f26c31d8573 65
Architect 0:6f26c31d8573 66 iap_entry( IAP_command, IAP_result );
Architect 0:6f26c31d8573 67
Architect 0:6f26c31d8573 68 return ( (int)IAP_result[ 0 ] );
Architect 0:6f26c31d8573 69 }
Architect 0:6f26c31d8573 70
Architect 0:6f26c31d8573 71 int read_eeprom( char *source_addr, char *target_addr, int size )
Architect 0:6f26c31d8573 72 {
Architect 0:6f26c31d8573 73 IAP_command[ 0 ] = 62;
Architect 0:6f26c31d8573 74 IAP_command[ 1 ] = (unsigned int)source_addr; // Source EEPROM address from which data bytes are to be read. This address should be a word boundary.
Architect 0:6f26c31d8573 75 IAP_command[ 2 ] = (unsigned int)target_addr; // Destination RAM address where data bytes are to be written. This address should be a 256 byte boundary.
Architect 0:6f26c31d8573 76 IAP_command[ 3 ] = size; // Number of bytes to be written. Should be 256 | 512 | 1024 | 4096.
Architect 0:6f26c31d8573 77 IAP_command[ 4 ] = SystemCoreClock / 1000; // CPU Clock Frequency (CCLK) in kHz.
Architect 0:6f26c31d8573 78
Architect 0:6f26c31d8573 79 iap_entry( IAP_command, IAP_result );
Architect 0:6f26c31d8573 80
Architect 0:6f26c31d8573 81 return ( (int)IAP_result[ 0 ] );
Architect 0:6f26c31d8573 82 }