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)

hal/mbed_pinmap_common.c@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 "hal/pinmap.h"
mega64 146:03e976389d16 17 #include "platform/mbed_error.h"
mega64 146:03e976389d16 18
mega64 146:03e976389d16 19 void pinmap_pinout(PinName pin, const PinMap *map) {
mega64 146:03e976389d16 20 if (pin == NC)
mega64 146:03e976389d16 21 return;
mega64 146:03e976389d16 22
mega64 146:03e976389d16 23 while (map->pin != NC) {
mega64 146:03e976389d16 24 if (map->pin == pin) {
mega64 146:03e976389d16 25 pin_function(pin, map->function);
mega64 146:03e976389d16 26
mega64 146:03e976389d16 27 pin_mode(pin, PullNone);
mega64 146:03e976389d16 28 return;
mega64 146:03e976389d16 29 }
mega64 146:03e976389d16 30 map++;
mega64 146:03e976389d16 31 }
mega64 146:03e976389d16 32 error("could not pinout");
mega64 146:03e976389d16 33 }
mega64 146:03e976389d16 34
mega64 146:03e976389d16 35 uint32_t pinmap_merge(uint32_t a, uint32_t b) {
mega64 146:03e976389d16 36 // both are the same (inc both NC)
mega64 146:03e976389d16 37 if (a == b)
mega64 146:03e976389d16 38 return a;
mega64 146:03e976389d16 39
mega64 146:03e976389d16 40 // one (or both) is not connected
mega64 146:03e976389d16 41 if (a == (uint32_t)NC)
mega64 146:03e976389d16 42 return b;
mega64 146:03e976389d16 43 if (b == (uint32_t)NC)
mega64 146:03e976389d16 44 return a;
mega64 146:03e976389d16 45
mega64 146:03e976389d16 46 // mis-match error case
mega64 146:03e976389d16 47 error("pinmap mis-match");
mega64 146:03e976389d16 48 return (uint32_t)NC;
mega64 146:03e976389d16 49 }
mega64 146:03e976389d16 50
mega64 146:03e976389d16 51 uint32_t pinmap_find_peripheral(PinName pin, const PinMap* map) {
mega64 146:03e976389d16 52 while (map->pin != NC) {
mega64 146:03e976389d16 53 if (map->pin == pin)
mega64 146:03e976389d16 54 return map->peripheral;
mega64 146:03e976389d16 55 map++;
mega64 146:03e976389d16 56 }
mega64 146:03e976389d16 57 return (uint32_t)NC;
mega64 146:03e976389d16 58 }
mega64 146:03e976389d16 59
mega64 146:03e976389d16 60 uint32_t pinmap_peripheral(PinName pin, const PinMap* map) {
mega64 146:03e976389d16 61 uint32_t peripheral = (uint32_t)NC;
mega64 146:03e976389d16 62
mega64 146:03e976389d16 63 if (pin == (PinName)NC)
mega64 146:03e976389d16 64 return (uint32_t)NC;
mega64 146:03e976389d16 65 peripheral = pinmap_find_peripheral(pin, map);
mega64 146:03e976389d16 66 if ((uint32_t)NC == peripheral) // no mapping available
mega64 146:03e976389d16 67 error("pinmap not found for peripheral");
mega64 146:03e976389d16 68 return peripheral;
mega64 146:03e976389d16 69 }
mega64 146:03e976389d16 70
mega64 146:03e976389d16 71 uint32_t pinmap_find_function(PinName pin, const PinMap* map) {
mega64 146:03e976389d16 72 while (map->pin != NC) {
mega64 146:03e976389d16 73 if (map->pin == pin)
mega64 146:03e976389d16 74 return map->function;
mega64 146:03e976389d16 75 map++;
mega64 146:03e976389d16 76 }
mega64 146:03e976389d16 77 return (uint32_t)NC;
mega64 146:03e976389d16 78 }
mega64 146:03e976389d16 79
mega64 146:03e976389d16 80 uint32_t pinmap_function(PinName pin, const PinMap* map) {
mega64 146:03e976389d16 81 uint32_t function = (uint32_t)NC;
mega64 146:03e976389d16 82
mega64 146:03e976389d16 83 if (pin == (PinName)NC)
mega64 146:03e976389d16 84 return (uint32_t)NC;
mega64 146:03e976389d16 85 function = pinmap_find_function(pin, map);
mega64 146:03e976389d16 86 if ((uint32_t)NC == function) // no mapping available
mega64 146:03e976389d16 87 error("pinmap not found for function");
mega64 146:03e976389d16 88 return function;
mega64 146:03e976389d16 89 }