Nothing Special / mbed-STM32F103C8

Modification of Mbed-dev library for LQFP48 package microcontrollers: STM32F103C8 (STM32F103C8T6) and STM32F103CB (STM32F103CBT6) (Bluepill boards, Maple mini etc. )

Fork of mbed-STM32F103C8_org by Nothing Special

Library for STM32F103C8 (Bluepill boards etc.).
Use this instead of mbed library.
This library allows the size of the code in the FLASH up to 128kB. Therefore, code also runs on microcontrollers STM32F103CB (eg. Maple mini).
But in the case of STM32F103C8, check the size of the resulting code would not exceed 64kB.

To compile a program with this library, use NUCLEO-F103RB as the target name. !

Changes:

  • Corrected initialization of the HSE + crystal clock (mbed permanent bug), allowing the use of on-board xtal (8MHz).(1)
  • Additionally, it also set USB clock (48Mhz).(2)
  • Definitions of pins and peripherals adjusted to LQFP48 case.
  • Board led LED1 is now PC_13 (3)
  • USER_BUTTON is now PC_14 (4)

    Now the library is complete rebuilt based on mbed-dev v160 (and not yet fully tested).

notes
(1) - In case 8MHz xtal on board, CPU frequency is 72MHz. Without xtal is 64MHz.
(2) - Using the USB interface is only possible if STM32 is clocking by on-board 8MHz xtal or external clock signal 8MHz on the OSC_IN pin.
(3) - On Bluepill board led operation is reversed, i.e. 0 - led on, 1 - led off.
(4) - Bluepill board has no real user button

Information

After export to SW4STM (AC6):

  • add line #include "mbed_config.h" in files Serial.h and RawSerial.h
  • in project properties change Optimisation Level to Optimise for size (-Os)

drivers/Stream.cpp@148:8b0b02bf146f, 2017-04-27 (annotated)

Committer:
mega64
Date:
Thu Apr 27 23:56:38 2017 +0000
Revision:
148:8b0b02bf146f
Parent:
146:03e976389d16 
Remove unnecessary folders

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mega64 146:03e976389d16 1 /* mbed Microcontroller Library
mega64 146:03e976389d16 2 * Copyright (c) 2006-2013 ARM Limited
mega64 146:03e976389d16 3 *
mega64 146:03e976389d16 4 * Licensed under the Apache License, Version 2.0 (the "License");
mega64 146:03e976389d16 5 * you may not use this file except in compliance with the License.
mega64 146:03e976389d16 6 * You may obtain a copy of the License at
mega64 146:03e976389d16 7 *
mega64 146:03e976389d16 8 * http://www.apache.org/licenses/LICENSE-2.0
mega64 146:03e976389d16 9 *
mega64 146:03e976389d16 10 * Unless required by applicable law or agreed to in writing, software
mega64 146:03e976389d16 11 * distributed under the License is distributed on an "AS IS" BASIS,
mega64 146:03e976389d16 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mega64 146:03e976389d16 13 * See the License for the specific language governing permissions and
mega64 146:03e976389d16 14 * limitations under the License.
mega64 146:03e976389d16 15 */
mega64 146:03e976389d16 16 #include "drivers/Stream.h"
mega64 146:03e976389d16 17
mega64 146:03e976389d16 18 namespace mbed {
mega64 146:03e976389d16 19
mega64 146:03e976389d16 20 Stream::Stream(const char *name) : FileLike(name), _file(NULL) {
mega64 146:03e976389d16 21 // No lock needed in constructor
mega64 146:03e976389d16 22 /* open ourselves */
mega64 146:03e976389d16 23 char buf[12]; /* :0x12345678 + null byte */
mega64 146:03e976389d16 24 std::sprintf(buf, ":%p", this);
mega64 146:03e976389d16 25 _file = std::fopen(buf, "w+");
mega64 146:03e976389d16 26 mbed_set_unbuffered_stream(_file);
mega64 146:03e976389d16 27 }
mega64 146:03e976389d16 28
mega64 146:03e976389d16 29 Stream::~Stream() {
mega64 146:03e976389d16 30 // No lock can be used in destructor
mega64 146:03e976389d16 31 fclose(_file);
mega64 146:03e976389d16 32 }
mega64 146:03e976389d16 33
mega64 146:03e976389d16 34 int Stream::putc(int c) {
mega64 146:03e976389d16 35 lock();
mega64 146:03e976389d16 36 fflush(_file);
mega64 146:03e976389d16 37 int ret = std::fputc(c, _file);
mega64 146:03e976389d16 38 unlock();
mega64 146:03e976389d16 39 return ret;
mega64 146:03e976389d16 40 }
mega64 146:03e976389d16 41 int Stream::puts(const char *s) {
mega64 146:03e976389d16 42 lock();
mega64 146:03e976389d16 43 fflush(_file);
mega64 146:03e976389d16 44 int ret = std::fputs(s, _file);
mega64 146:03e976389d16 45 unlock();
mega64 146:03e976389d16 46 return ret;
mega64 146:03e976389d16 47 }
mega64 146:03e976389d16 48 int Stream::getc() {
mega64 146:03e976389d16 49 lock();
mega64 146:03e976389d16 50 fflush(_file);
mega64 146:03e976389d16 51 int ret = mbed_getc(_file);
mega64 146:03e976389d16 52 unlock();
mega64 146:03e976389d16 53 return ret;
mega64 146:03e976389d16 54 }
mega64 146:03e976389d16 55 char* Stream::gets(char *s, int size) {
mega64 146:03e976389d16 56 lock();
mega64 146:03e976389d16 57 fflush(_file);
mega64 146:03e976389d16 58 char *ret = mbed_gets(s,size,_file);
mega64 146:03e976389d16 59 unlock();
mega64 146:03e976389d16 60 return ret;
mega64 146:03e976389d16 61 }
mega64 146:03e976389d16 62
mega64 146:03e976389d16 63 int Stream::close() {
mega64 146:03e976389d16 64 return 0;
mega64 146:03e976389d16 65 }
mega64 146:03e976389d16 66
mega64 146:03e976389d16 67 ssize_t Stream::write(const void* buffer, size_t length) {
mega64 146:03e976389d16 68 const char* ptr = (const char*)buffer;
mega64 146:03e976389d16 69 const char* end = ptr + length;
mega64 146:03e976389d16 70
mega64 146:03e976389d16 71 lock();
mega64 146:03e976389d16 72 while (ptr != end) {
mega64 146:03e976389d16 73 if (_putc(*ptr++) == EOF) {
mega64 146:03e976389d16 74 break;
mega64 146:03e976389d16 75 }
mega64 146:03e976389d16 76 }
mega64 146:03e976389d16 77 unlock();
mega64 146:03e976389d16 78
mega64 146:03e976389d16 79 return ptr - (const char*)buffer;
mega64 146:03e976389d16 80 }
mega64 146:03e976389d16 81
mega64 146:03e976389d16 82 ssize_t Stream::read(void* buffer, size_t length) {
mega64 146:03e976389d16 83 char* ptr = (char*)buffer;
mega64 146:03e976389d16 84 char* end = ptr + length;
mega64 146:03e976389d16 85
mega64 146:03e976389d16 86 lock();
mega64 146:03e976389d16 87 while (ptr != end) {
mega64 146:03e976389d16 88 int c = _getc();
mega64 146:03e976389d16 89 if (c==EOF) break;
mega64 146:03e976389d16 90 *ptr++ = c;
mega64 146:03e976389d16 91 }
mega64 146:03e976389d16 92 unlock();
mega64 146:03e976389d16 93
mega64 146:03e976389d16 94 return ptr - (const char*)buffer;
mega64 146:03e976389d16 95 }
mega64 146:03e976389d16 96
mega64 146:03e976389d16 97 off_t Stream::seek(off_t offset, int whence) {
mega64 146:03e976389d16 98 return 0;
mega64 146:03e976389d16 99 }
mega64 146:03e976389d16 100
mega64 146:03e976389d16 101 off_t Stream::tell() {
mega64 146:03e976389d16 102 return 0;
mega64 146:03e976389d16 103 }
mega64 146:03e976389d16 104
mega64 146:03e976389d16 105 void Stream::rewind() {
mega64 146:03e976389d16 106 }
mega64 146:03e976389d16 107
mega64 146:03e976389d16 108 int Stream::isatty() {
mega64 146:03e976389d16 109 return 0;
mega64 146:03e976389d16 110 }
mega64 146:03e976389d16 111
mega64 146:03e976389d16 112 int Stream::sync() {
mega64 146:03e976389d16 113 return 0;
mega64 146:03e976389d16 114 }
mega64 146:03e976389d16 115
mega64 146:03e976389d16 116 size_t Stream::size() {
mega64 146:03e976389d16 117 return 0;
mega64 146:03e976389d16 118 }
mega64 146:03e976389d16 119
mega64 146:03e976389d16 120 int Stream::printf(const char* format, ...) {
mega64 146:03e976389d16 121 lock();
mega64 146:03e976389d16 122 std::va_list arg;
mega64 146:03e976389d16 123 va_start(arg, format);
mega64 146:03e976389d16 124 fflush(_file);
mega64 146:03e976389d16 125 int r = vfprintf(_file, format, arg);
mega64 146:03e976389d16 126 va_end(arg);
mega64 146:03e976389d16 127 unlock();
mega64 146:03e976389d16 128 return r;
mega64 146:03e976389d16 129 }
mega64 146:03e976389d16 130
mega64 146:03e976389d16 131 int Stream::scanf(const char* format, ...) {
mega64 146:03e976389d16 132 lock();
mega64 146:03e976389d16 133 std::va_list arg;
mega64 146:03e976389d16 134 va_start(arg, format);
mega64 146:03e976389d16 135 fflush(_file);
mega64 146:03e976389d16 136 int r = vfscanf(_file, format, arg);
mega64 146:03e976389d16 137 va_end(arg);
mega64 146:03e976389d16 138 unlock();
mega64 146:03e976389d16 139 return r;
mega64 146:03e976389d16 140 }
mega64 146:03e976389d16 141
mega64 146:03e976389d16 142 int Stream::vprintf(const char* format, std::va_list args) {
mega64 146:03e976389d16 143 lock();
mega64 146:03e976389d16 144 fflush(_file);
mega64 146:03e976389d16 145 int r = vfprintf(_file, format, args);
mega64 146:03e976389d16 146 unlock();
mega64 146:03e976389d16 147 return r;
mega64 146:03e976389d16 148 }
mega64 146:03e976389d16 149
mega64 146:03e976389d16 150 int Stream::vscanf(const char* format, std::va_list args) {
mega64 146:03e976389d16 151 lock();
mega64 146:03e976389d16 152 fflush(_file);
mega64 146:03e976389d16 153 int r = vfscanf(_file, format, args);
mega64 146:03e976389d16 154 unlock();
mega64 146:03e976389d16 155 return r;
mega64 146:03e976389d16 156 }
mega64 146:03e976389d16 157
mega64 146:03e976389d16 158 } // namespace mbed