mbed_interface.c

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2006-2013 ARM Limited
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 #include <stdio.h>
00017 #include "mbed_interface.h"
00018 
00019 #include "gpio_api.h"
00020 #include "wait_api.h"
00021 #include "semihost_api.h"
00022 #include "error.h"
00023 #include "toolchain.h"
00024 
00025 #if DEVICE_SEMIHOST
00026 
00027 // return true if a debugger is attached, indicating mbed interface is connected
00028 int mbed_interface_connected(void) {
00029     return semihost_connected();
00030 }
00031 
00032 int mbed_interface_reset(void) {
00033     if (mbed_interface_connected()) {
00034         semihost_reset();
00035         return 0;
00036     } else {
00037         return -1;
00038     }
00039 }
00040 
00041 WEAK int mbed_interface_uid(char *uid);
00042 WEAK int mbed_interface_uid(char *uid) {
00043     if (mbed_interface_connected()) {
00044         return semihost_uid(uid); // Returns 0 if successful, -1 on failure
00045     } else {
00046         uid[0] = 0;
00047         return -1;
00048     }
00049 }
00050 
00051 int mbed_interface_disconnect(void) {
00052     if (mbed_interface_connected()) {
00053         return semihost_disabledebug();
00054     } else {
00055         return -1;
00056     }
00057 }
00058 
00059 int mbed_interface_powerdown(void) {
00060     if (mbed_interface_connected()) {
00061         return semihost_powerdown();
00062     } else {
00063         return -1;
00064     }
00065 }
00066 
00067 // for backward compatibility
00068 void mbed_reset(void) {
00069     mbed_interface_reset();
00070 }
00071 
00072 WEAK int mbed_uid(char *uid);
00073 WEAK int mbed_uid(char *uid) {
00074     return mbed_interface_uid(uid);
00075 }
00076 #endif
00077 
00078 WEAK void mbed_mac_address(char *mac);
00079 WEAK void mbed_mac_address(char *mac) {
00080 #if DEVICE_SEMIHOST
00081     char uid[DEVICE_ID_LENGTH + 1];
00082     int i;
00083     
00084     // if we have a UID, extract the MAC
00085     if (mbed_interface_uid(uid) == 0) {
00086         char *p = uid;
00087 #if defined(DEVICE_MAC_OFFSET)
00088         p += DEVICE_MAC_OFFSET;
00089 #endif
00090         for (i=0; i<6; i++) {
00091             int byte;
00092             sscanf(p, "%2x", &byte);
00093             mac[i] = byte;
00094             p += 2;
00095         }
00096     } else {  // else return a default MAC
00097 #endif
00098         mac[0] = 0x00;
00099         mac[1] = 0x02;
00100         mac[2] = 0xF7;
00101         mac[3] = 0xF0;
00102         mac[4] = 0x00;
00103         mac[5] = 0x00;
00104 #if DEVICE_SEMIHOST
00105     }
00106 #endif
00107 }