25AA02EE48.c

00001 /****************************************************************************
00002  *    Copyright 2010 Andy Kirkham, Stellar Technologies Ltd
00003  *    
00004  *    This file is part of the Satellite Observers Workbench (SOWB).
00005  *
00006  *    SOWB is free software: you can redistribute it and/or modify
00007  *    it under the terms of the GNU General Public License as published by
00008  *    the Free Software Foundation, either version 3 of the License, or
00009  *    (at your option) any later version.
00010  *
00011  *    SOWB is distributed in the hope that it will be useful,
00012  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  *    GNU General Public License for more details.
00015  *
00016  *    You should have received a copy of the GNU General Public License
00017  *    along with SOWB.  If not, see <http://www.gnu.org/licenses/>.
00018  *
00019  *    $Id: main.cpp 5 2010-07-12 20:51:11Z ajk $
00020  *    
00021  ***************************************************************************/
00022 
00023 #include "sowb.h"
00024 #include "user.h"
00025 #include "flash.h"
00026 #include "ssp0.h"
00027 #include "gpio.h"
00028 
00029 char mac_addr[6];
00030 
00031 /** _25AA02E48_mac_addr
00032  *
00033  * Get a copy of the MAC address with a null terminator.
00034  *
00035  * @param char *s a buffer, 7 bytes long, to hold the MAC+null
00036  */
00037 void _25AA02E48_mac_addr(char *s) {
00038     memcpy(s, mac_addr, 6);
00039     s[6] = '\0';
00040 }
00041 
00042 /** _25AA02E48_mac_addr_printable
00043  *
00044  * Create a string that represents the MAC addr as a
00045  * printable ASCII string. The caller is responsible 
00046  * for allocating enough space in the buffer pointed
00047  * to by s to hold the string.
00048  *
00049  * @param char *s a buffer, 18 bytes long, to hold the MAC
00050  * @param char divider A character to divide the bytes or 0
00051  */
00052 void _25AA02E48_mac_addr_printable(char *s, char divider) {
00053     if (divider != 0) {
00054         sprintf(s, "%02X%c%02X%c%02X%c%02X%c%02X%c%02X", 
00055             mac_addr[0], divider, mac_addr[1], divider, mac_addr[2], divider, 
00056             mac_addr[3], divider, mac_addr[4], divider, mac_addr[5]);
00057     }
00058     else {
00059         sprintf(s, "%02X%02X%02X%02X%02X%02X", 
00060             mac_addr[0], mac_addr[1], mac_addr[2], 
00061             mac_addr[3], mac_addr[4], mac_addr[5]);    
00062     }
00063 }
00064 
00065 /** _25AA02E48_init
00066  */
00067 void _25AA02E48_init(void) {
00068 
00069     /* Assumes SSP0 is already _init() */
00070     
00071     while(!SSP0_request()) WHILE_WAITING_DO_PROCESS_FUNCTIONS;
00072     
00073     LPC_SSP0->CPSR = _25AA02E48_SSP_INIT_CPSR;    
00074     AA02E48_CS_ASSERT;
00075     FLASH_SHORT_COMMAND(FLASH_READ);
00076     SSP0_WRITE_BYTE(0xFA);
00077     SSP0_FLUSH_RX_FIFO;
00078     
00079     for (int i = 0; i < 6; i++) {
00080         SSP0_WRITE_BYTE(0x00);
00081         while(SSP0_IS_BUSY || (LPC_SSP0->SR & (1UL << 2)) == 0);
00082         mac_addr[i] = (char)LPC_SSP0->DR;        
00083     }
00084     
00085     AA02E48_CS_DEASSERT;
00086     LPC_SSP0->CPSR = FLASH_SSP_INIT_CPSR;
00087     SSP0_release();
00088 }