Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

common/mbed_interface.c@147:ba84b7dc41a7, 2016-09-10 (annotated)

Committer:
JojoS
Date:
Sat Sep 10 15:32:04 2016 +0000
Revision:
147:ba84b7dc41a7
Parent:
144:ef7eb2e8f9f7 
added prescaler for 16 bit timers (solution as in LPC11xx), default prescaler 31 for max 28 ms period time

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2006-2013 ARM Limited
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 144:ef7eb2e8f9f7 5 * you may not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 6 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 144:ef7eb2e8f9f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 13 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 14 * limitations under the License.
<> 144:ef7eb2e8f9f7 15 */
<> 144:ef7eb2e8f9f7 16 #include <stdio.h>
<> 144:ef7eb2e8f9f7 17 #include "mbed_interface.h"
<> 144:ef7eb2e8f9f7 18
<> 144:ef7eb2e8f9f7 19 #include "gpio_api.h"
<> 144:ef7eb2e8f9f7 20 #include "wait_api.h"
<> 144:ef7eb2e8f9f7 21 #include "semihost_api.h"
<> 144:ef7eb2e8f9f7 22 #include "mbed_error.h"
<> 144:ef7eb2e8f9f7 23 #include "toolchain.h"
<> 144:ef7eb2e8f9f7 24
<> 144:ef7eb2e8f9f7 25 #if DEVICE_SEMIHOST
<> 144:ef7eb2e8f9f7 26
<> 144:ef7eb2e8f9f7 27 // return true if a debugger is attached, indicating mbed interface is connected
<> 144:ef7eb2e8f9f7 28 int mbed_interface_connected(void) {
<> 144:ef7eb2e8f9f7 29 return semihost_connected();
<> 144:ef7eb2e8f9f7 30 }
<> 144:ef7eb2e8f9f7 31
<> 144:ef7eb2e8f9f7 32 int mbed_interface_reset(void) {
<> 144:ef7eb2e8f9f7 33 if (mbed_interface_connected()) {
<> 144:ef7eb2e8f9f7 34 semihost_reset();
<> 144:ef7eb2e8f9f7 35 return 0;
<> 144:ef7eb2e8f9f7 36 } else {
<> 144:ef7eb2e8f9f7 37 return -1;
<> 144:ef7eb2e8f9f7 38 }
<> 144:ef7eb2e8f9f7 39 }
<> 144:ef7eb2e8f9f7 40
<> 144:ef7eb2e8f9f7 41 WEAK int mbed_interface_uid(char *uid) {
<> 144:ef7eb2e8f9f7 42 if (mbed_interface_connected()) {
<> 144:ef7eb2e8f9f7 43 return semihost_uid(uid); // Returns 0 if successful, -1 on failure
<> 144:ef7eb2e8f9f7 44 } else {
<> 144:ef7eb2e8f9f7 45 uid[0] = 0;
<> 144:ef7eb2e8f9f7 46 return -1;
<> 144:ef7eb2e8f9f7 47 }
<> 144:ef7eb2e8f9f7 48 }
<> 144:ef7eb2e8f9f7 49
<> 144:ef7eb2e8f9f7 50 int mbed_interface_disconnect(void) {
<> 144:ef7eb2e8f9f7 51 int res;
<> 144:ef7eb2e8f9f7 52 if (mbed_interface_connected()) {
<> 144:ef7eb2e8f9f7 53 if ((res = semihost_disabledebug()) != 0)
<> 144:ef7eb2e8f9f7 54 return res;
<> 144:ef7eb2e8f9f7 55 while (mbed_interface_connected());
<> 144:ef7eb2e8f9f7 56 return 0;
<> 144:ef7eb2e8f9f7 57 } else {
<> 144:ef7eb2e8f9f7 58 return -1;
<> 144:ef7eb2e8f9f7 59 }
<> 144:ef7eb2e8f9f7 60 }
<> 144:ef7eb2e8f9f7 61
<> 144:ef7eb2e8f9f7 62 int mbed_interface_powerdown(void) {
<> 144:ef7eb2e8f9f7 63 int res;
<> 144:ef7eb2e8f9f7 64 if (mbed_interface_connected()) {
<> 144:ef7eb2e8f9f7 65 if ((res = semihost_powerdown()) != 0)
<> 144:ef7eb2e8f9f7 66 return res;
<> 144:ef7eb2e8f9f7 67 while (mbed_interface_connected());
<> 144:ef7eb2e8f9f7 68 return 0;
<> 144:ef7eb2e8f9f7 69 } else {
<> 144:ef7eb2e8f9f7 70 return -1;
<> 144:ef7eb2e8f9f7 71 }
<> 144:ef7eb2e8f9f7 72 }
<> 144:ef7eb2e8f9f7 73
<> 144:ef7eb2e8f9f7 74 // for backward compatibility
<> 144:ef7eb2e8f9f7 75 void mbed_reset(void) {
<> 144:ef7eb2e8f9f7 76 mbed_interface_reset();
<> 144:ef7eb2e8f9f7 77 }
<> 144:ef7eb2e8f9f7 78
<> 144:ef7eb2e8f9f7 79 WEAK int mbed_uid(char *uid) {
<> 144:ef7eb2e8f9f7 80 return mbed_interface_uid(uid);
<> 144:ef7eb2e8f9f7 81 }
<> 144:ef7eb2e8f9f7 82 #endif
<> 144:ef7eb2e8f9f7 83
<> 144:ef7eb2e8f9f7 84 WEAK void mbed_mac_address(char *mac) {
<> 144:ef7eb2e8f9f7 85 #if DEVICE_SEMIHOST
<> 144:ef7eb2e8f9f7 86 char uid[DEVICE_ID_LENGTH + 1];
<> 144:ef7eb2e8f9f7 87 int i;
<> 144:ef7eb2e8f9f7 88
<> 144:ef7eb2e8f9f7 89 // if we have a UID, extract the MAC
<> 144:ef7eb2e8f9f7 90 if (mbed_interface_uid(uid) == 0) {
<> 144:ef7eb2e8f9f7 91 char *p = uid;
<> 144:ef7eb2e8f9f7 92 #if defined(DEVICE_MAC_OFFSET)
<> 144:ef7eb2e8f9f7 93 p += DEVICE_MAC_OFFSET;
<> 144:ef7eb2e8f9f7 94 #endif
<> 144:ef7eb2e8f9f7 95 for (i=0; i<6; i++) {
<> 144:ef7eb2e8f9f7 96 int byte;
<> 144:ef7eb2e8f9f7 97 sscanf(p, "%2x", &byte);
<> 144:ef7eb2e8f9f7 98 mac[i] = byte;
<> 144:ef7eb2e8f9f7 99 p += 2;
<> 144:ef7eb2e8f9f7 100 }
<> 144:ef7eb2e8f9f7 101 mac[0] &= ~0x01; // reset the IG bit in the address; see IEE 802.3-2002, Section 3.2.3(b)
<> 144:ef7eb2e8f9f7 102 } else { // else return a default MAC
<> 144:ef7eb2e8f9f7 103 #endif
<> 144:ef7eb2e8f9f7 104 mac[0] = 0x00;
<> 144:ef7eb2e8f9f7 105 mac[1] = 0x02;
<> 144:ef7eb2e8f9f7 106 mac[2] = 0xF7;
<> 144:ef7eb2e8f9f7 107 mac[3] = 0xF0;
<> 144:ef7eb2e8f9f7 108 mac[4] = 0x00;
<> 144:ef7eb2e8f9f7 109 mac[5] = 0x00;
<> 144:ef7eb2e8f9f7 110 #if DEVICE_SEMIHOST
<> 144:ef7eb2e8f9f7 111 }
<> 144:ef7eb2e8f9f7 112 #endif
<> 144:ef7eb2e8f9f7 113 }