Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

common/mbed_semihost_api.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 "cmsis.h"
<> 144:ef7eb2e8f9f7 17 #include "semihost_api.h"
<> 144:ef7eb2e8f9f7 18
<> 144:ef7eb2e8f9f7 19 #include <stdint.h>
<> 144:ef7eb2e8f9f7 20 #include <string.h>
<> 144:ef7eb2e8f9f7 21
<> 144:ef7eb2e8f9f7 22 #if DEVICE_SEMIHOST
<> 144:ef7eb2e8f9f7 23
<> 144:ef7eb2e8f9f7 24 // ARM Semihosting Commands
<> 144:ef7eb2e8f9f7 25 #define SYS_OPEN (0x1)
<> 144:ef7eb2e8f9f7 26 #define SYS_CLOSE (0x2)
<> 144:ef7eb2e8f9f7 27 #define SYS_WRITE (0x5)
<> 144:ef7eb2e8f9f7 28 #define SYS_READ (0x6)
<> 144:ef7eb2e8f9f7 29 #define SYS_ISTTY (0x9)
<> 144:ef7eb2e8f9f7 30 #define SYS_SEEK (0xa)
<> 144:ef7eb2e8f9f7 31 #define SYS_ENSURE (0xb)
<> 144:ef7eb2e8f9f7 32 #define SYS_FLEN (0xc)
<> 144:ef7eb2e8f9f7 33 #define SYS_REMOVE (0xe)
<> 144:ef7eb2e8f9f7 34 #define SYS_RENAME (0xf)
<> 144:ef7eb2e8f9f7 35 #define SYS_EXIT (0x18)
<> 144:ef7eb2e8f9f7 36
<> 144:ef7eb2e8f9f7 37 // mbed Semihosting Commands
<> 144:ef7eb2e8f9f7 38 #define RESERVED_FOR_USER_APPLICATIONS (0x100) // 0x100 - 0x1ff
<> 144:ef7eb2e8f9f7 39 #define USR_XFFIND (RESERVED_FOR_USER_APPLICATIONS + 0)
<> 144:ef7eb2e8f9f7 40 #define USR_UID (RESERVED_FOR_USER_APPLICATIONS + 1)
<> 144:ef7eb2e8f9f7 41 #define USR_RESET (RESERVED_FOR_USER_APPLICATIONS + 2)
<> 144:ef7eb2e8f9f7 42 #define USR_VBUS (RESERVED_FOR_USER_APPLICATIONS + 3)
<> 144:ef7eb2e8f9f7 43 #define USR_POWERDOWN (RESERVED_FOR_USER_APPLICATIONS + 4)
<> 144:ef7eb2e8f9f7 44 #define USR_DISABLEDEBUG (RESERVED_FOR_USER_APPLICATIONS + 5)
<> 144:ef7eb2e8f9f7 45
<> 144:ef7eb2e8f9f7 46 #if DEVICE_LOCALFILESYSTEM
<> 144:ef7eb2e8f9f7 47 FILEHANDLE semihost_open(const char* name, int openmode) {
<> 144:ef7eb2e8f9f7 48 uint32_t args[3];
<> 144:ef7eb2e8f9f7 49 args[0] = (uint32_t)name;
<> 144:ef7eb2e8f9f7 50 args[1] = (uint32_t)openmode;
<> 144:ef7eb2e8f9f7 51 args[2] = (uint32_t)strlen(name);
<> 144:ef7eb2e8f9f7 52 return __semihost(SYS_OPEN, args);
<> 144:ef7eb2e8f9f7 53 }
<> 144:ef7eb2e8f9f7 54
<> 144:ef7eb2e8f9f7 55 int semihost_close(FILEHANDLE fh) {
<> 144:ef7eb2e8f9f7 56 return __semihost(SYS_CLOSE, &fh);
<> 144:ef7eb2e8f9f7 57 }
<> 144:ef7eb2e8f9f7 58
<> 144:ef7eb2e8f9f7 59 int semihost_write(FILEHANDLE fh, const unsigned char* buffer, unsigned int length, int mode) {
<> 144:ef7eb2e8f9f7 60 if (length == 0) return 0;
<> 144:ef7eb2e8f9f7 61
<> 144:ef7eb2e8f9f7 62 uint32_t args[3];
<> 144:ef7eb2e8f9f7 63 args[0] = (uint32_t)fh;
<> 144:ef7eb2e8f9f7 64 args[1] = (uint32_t)buffer;
<> 144:ef7eb2e8f9f7 65 args[2] = (uint32_t)length;
<> 144:ef7eb2e8f9f7 66 return __semihost(SYS_WRITE, args);
<> 144:ef7eb2e8f9f7 67 }
<> 144:ef7eb2e8f9f7 68
<> 144:ef7eb2e8f9f7 69 int semihost_read(FILEHANDLE fh, unsigned char* buffer, unsigned int length, int mode) {
<> 144:ef7eb2e8f9f7 70 uint32_t args[3];
<> 144:ef7eb2e8f9f7 71 args[0] = (uint32_t)fh;
<> 144:ef7eb2e8f9f7 72 args[1] = (uint32_t)buffer;
<> 144:ef7eb2e8f9f7 73 args[2] = (uint32_t)length;
<> 144:ef7eb2e8f9f7 74 return __semihost(SYS_READ, args);
<> 144:ef7eb2e8f9f7 75 }
<> 144:ef7eb2e8f9f7 76
<> 144:ef7eb2e8f9f7 77 int semihost_istty(FILEHANDLE fh) {
<> 144:ef7eb2e8f9f7 78 return __semihost(SYS_ISTTY, &fh);
<> 144:ef7eb2e8f9f7 79 }
<> 144:ef7eb2e8f9f7 80
<> 144:ef7eb2e8f9f7 81 int semihost_seek(FILEHANDLE fh, long position) {
<> 144:ef7eb2e8f9f7 82 uint32_t args[2];
<> 144:ef7eb2e8f9f7 83 args[0] = (uint32_t)fh;
<> 144:ef7eb2e8f9f7 84 args[1] = (uint32_t)position;
<> 144:ef7eb2e8f9f7 85 return __semihost(SYS_SEEK, args);
<> 144:ef7eb2e8f9f7 86 }
<> 144:ef7eb2e8f9f7 87
<> 144:ef7eb2e8f9f7 88 int semihost_ensure(FILEHANDLE fh) {
<> 144:ef7eb2e8f9f7 89 return __semihost(SYS_ENSURE, &fh);
<> 144:ef7eb2e8f9f7 90 }
<> 144:ef7eb2e8f9f7 91
<> 144:ef7eb2e8f9f7 92 long semihost_flen(FILEHANDLE fh) {
<> 144:ef7eb2e8f9f7 93 return __semihost(SYS_FLEN, &fh);
<> 144:ef7eb2e8f9f7 94 }
<> 144:ef7eb2e8f9f7 95
<> 144:ef7eb2e8f9f7 96 int semihost_remove(const char *name) {
<> 144:ef7eb2e8f9f7 97 uint32_t args[2];
<> 144:ef7eb2e8f9f7 98 args[0] = (uint32_t)name;
<> 144:ef7eb2e8f9f7 99 args[1] = (uint32_t)strlen(name);
<> 144:ef7eb2e8f9f7 100 return __semihost(SYS_REMOVE, args);
<> 144:ef7eb2e8f9f7 101 }
<> 144:ef7eb2e8f9f7 102
<> 144:ef7eb2e8f9f7 103 int semihost_rename(const char *old_name, const char *new_name) {
<> 144:ef7eb2e8f9f7 104 uint32_t args[4];
<> 144:ef7eb2e8f9f7 105 args[0] = (uint32_t)old_name;
<> 144:ef7eb2e8f9f7 106 args[1] = (uint32_t)strlen(old_name);
<> 144:ef7eb2e8f9f7 107 args[0] = (uint32_t)new_name;
<> 144:ef7eb2e8f9f7 108 args[1] = (uint32_t)strlen(new_name);
<> 144:ef7eb2e8f9f7 109 return __semihost(SYS_RENAME, args);
<> 144:ef7eb2e8f9f7 110 }
<> 144:ef7eb2e8f9f7 111 #endif
<> 144:ef7eb2e8f9f7 112
<> 144:ef7eb2e8f9f7 113 int semihost_exit(void) {
<> 144:ef7eb2e8f9f7 114 uint32_t args[4];
<> 144:ef7eb2e8f9f7 115 return __semihost(SYS_EXIT, args);
<> 144:ef7eb2e8f9f7 116 }
<> 144:ef7eb2e8f9f7 117
<> 144:ef7eb2e8f9f7 118 int semihost_uid(char *uid) {
<> 144:ef7eb2e8f9f7 119 uint32_t args[2];
<> 144:ef7eb2e8f9f7 120 args[0] = (uint32_t)uid;
<> 144:ef7eb2e8f9f7 121 args[1] = DEVICE_ID_LENGTH + 1;
<> 144:ef7eb2e8f9f7 122 return __semihost(USR_UID, &args);
<> 144:ef7eb2e8f9f7 123 }
<> 144:ef7eb2e8f9f7 124
<> 144:ef7eb2e8f9f7 125 int semihost_reset(void) {
<> 144:ef7eb2e8f9f7 126 // Does not normally return, however if used with older firmware versions
<> 144:ef7eb2e8f9f7 127 // that do not support this call it will return -1.
<> 144:ef7eb2e8f9f7 128 return __semihost(USR_RESET, NULL);
<> 144:ef7eb2e8f9f7 129 }
<> 144:ef7eb2e8f9f7 130
<> 144:ef7eb2e8f9f7 131 int semihost_vbus(void) {
<> 144:ef7eb2e8f9f7 132 return __semihost(USR_VBUS, NULL);
<> 144:ef7eb2e8f9f7 133 }
<> 144:ef7eb2e8f9f7 134
<> 144:ef7eb2e8f9f7 135 int semihost_powerdown(void) {
<> 144:ef7eb2e8f9f7 136 return __semihost(USR_POWERDOWN, NULL);
<> 144:ef7eb2e8f9f7 137 }
<> 144:ef7eb2e8f9f7 138
<> 144:ef7eb2e8f9f7 139 #if DEVICE_DEBUG_AWARENESS
<> 144:ef7eb2e8f9f7 140
<> 144:ef7eb2e8f9f7 141 int semihost_connected(void) {
<> 144:ef7eb2e8f9f7 142 return (CoreDebug->DHCSR & CoreDebug_DHCSR_C_DEBUGEN_Msk) ? 1 : 0;
<> 144:ef7eb2e8f9f7 143 }
<> 144:ef7eb2e8f9f7 144
<> 144:ef7eb2e8f9f7 145 #else
<> 144:ef7eb2e8f9f7 146 // These processors cannot know if the interface is connect, assume so:
<> 144:ef7eb2e8f9f7 147 static int is_debugger_attached = 1;
<> 144:ef7eb2e8f9f7 148
<> 144:ef7eb2e8f9f7 149 int semihost_connected(void) {
<> 144:ef7eb2e8f9f7 150 return is_debugger_attached;
<> 144:ef7eb2e8f9f7 151 }
<> 144:ef7eb2e8f9f7 152 #endif
<> 144:ef7eb2e8f9f7 153
<> 144:ef7eb2e8f9f7 154 int semihost_disabledebug(void) {
<> 144:ef7eb2e8f9f7 155 #if !(DEVICE_DEBUG_AWARENESS)
<> 144:ef7eb2e8f9f7 156 is_debugger_attached = 0;
<> 144:ef7eb2e8f9f7 157 #endif
<> 144:ef7eb2e8f9f7 158 return __semihost(USR_DISABLEDEBUG, NULL);
<> 144:ef7eb2e8f9f7 159 }
<> 144:ef7eb2e8f9f7 160
<> 144:ef7eb2e8f9f7 161 #endif
<> 144:ef7eb2e8f9f7 162