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)

platform/mbed_board.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 <stdio.h>
mega64 146:03e976389d16 17 #include "hal/gpio_api.h"
mega64 146:03e976389d16 18 #include "platform/mbed_wait_api.h"
mega64 146:03e976389d16 19 #include "platform/mbed_toolchain.h"
mega64 146:03e976389d16 20 #include "platform/mbed_interface.h"
mega64 146:03e976389d16 21 #include "platform/mbed_critical.h"
mega64 146:03e976389d16 22 #include "hal/serial_api.h"
mega64 146:03e976389d16 23
mega64 146:03e976389d16 24 #if DEVICE_SERIAL
mega64 146:03e976389d16 25 extern int stdio_uart_inited;
mega64 146:03e976389d16 26 extern serial_t stdio_uart;
mega64 146:03e976389d16 27 #endif
mega64 146:03e976389d16 28
mega64 146:03e976389d16 29 WEAK void mbed_die(void) {
mega64 146:03e976389d16 30 #if !defined (NRF51_H) && !defined(TARGET_EFM32)
mega64 146:03e976389d16 31 core_util_critical_section_enter();
mega64 146:03e976389d16 32 #endif
mega64 146:03e976389d16 33 #if (DEVICE_ERROR_RED == 1)
mega64 146:03e976389d16 34 gpio_t led_red; gpio_init_out(&led_red, LED_RED);
mega64 146:03e976389d16 35 #elif (DEVICE_ERROR_PATTERN == 1)
mega64 146:03e976389d16 36 gpio_t led_1; gpio_init_out(&led_1, LED1);
mega64 146:03e976389d16 37 gpio_t led_2; gpio_init_out(&led_2, LED2);
mega64 146:03e976389d16 38 gpio_t led_3; gpio_init_out(&led_3, LED3);
mega64 146:03e976389d16 39 gpio_t led_4; gpio_init_out(&led_4, LED4);
mega64 146:03e976389d16 40 #endif
mega64 146:03e976389d16 41
mega64 146:03e976389d16 42 while (1) {
mega64 146:03e976389d16 43 #if (DEVICE_ERROR_RED == 1)
mega64 146:03e976389d16 44 gpio_write(&led_red, 1);
mega64 146:03e976389d16 45
mega64 146:03e976389d16 46 #elif (DEVICE_ERROR_PATTERN == 1)
mega64 146:03e976389d16 47 gpio_write(&led_1, 1);
mega64 146:03e976389d16 48 gpio_write(&led_2, 0);
mega64 146:03e976389d16 49 gpio_write(&led_3, 0);
mega64 146:03e976389d16 50 gpio_write(&led_4, 1);
mega64 146:03e976389d16 51 #endif
mega64 146:03e976389d16 52
mega64 146:03e976389d16 53 wait_ms(150);
mega64 146:03e976389d16 54
mega64 146:03e976389d16 55 #if (DEVICE_ERROR_RED == 1)
mega64 146:03e976389d16 56 gpio_write(&led_red, 0);
mega64 146:03e976389d16 57
mega64 146:03e976389d16 58 #elif (DEVICE_ERROR_PATTERN == 1)
mega64 146:03e976389d16 59 gpio_write(&led_1, 0);
mega64 146:03e976389d16 60 gpio_write(&led_2, 1);
mega64 146:03e976389d16 61 gpio_write(&led_3, 1);
mega64 146:03e976389d16 62 gpio_write(&led_4, 0);
mega64 146:03e976389d16 63 #endif
mega64 146:03e976389d16 64
mega64 146:03e976389d16 65 wait_ms(150);
mega64 146:03e976389d16 66 }
mega64 146:03e976389d16 67 }
mega64 146:03e976389d16 68
mega64 146:03e976389d16 69 void mbed_error_printf(const char* format, ...) {
mega64 146:03e976389d16 70 va_list arg;
mega64 146:03e976389d16 71 va_start(arg, format);
mega64 146:03e976389d16 72 mbed_error_vfprintf(format, arg);
mega64 146:03e976389d16 73 va_end(arg);
mega64 146:03e976389d16 74 }
mega64 146:03e976389d16 75
mega64 146:03e976389d16 76 void mbed_error_vfprintf(const char * format, va_list arg) {
mega64 146:03e976389d16 77 #if DEVICE_SERIAL
mega64 146:03e976389d16 78
mega64 146:03e976389d16 79 #if MBED_CONF_PLATFORM_STDIO_CONVERT_NEWLINES
mega64 146:03e976389d16 80 char stdio_out_prev;
mega64 146:03e976389d16 81 #endif
mega64 146:03e976389d16 82
mega64 146:03e976389d16 83 core_util_critical_section_enter();
mega64 146:03e976389d16 84 char buffer[128];
mega64 146:03e976389d16 85 int size = vsprintf(buffer, format, arg);
mega64 146:03e976389d16 86 if (size > 0) {
mega64 146:03e976389d16 87 if (!stdio_uart_inited) {
mega64 146:03e976389d16 88 serial_init(&stdio_uart, STDIO_UART_TX, STDIO_UART_RX);
mega64 146:03e976389d16 89 }
mega64 146:03e976389d16 90 #if MBED_CONF_PLATFORM_STDIO_CONVERT_NEWLINES
mega64 146:03e976389d16 91 for (unsigned int i = 0; i < size; i++) {
mega64 146:03e976389d16 92 if (buffer[i] == '\n' && stdio_out_prev != '\r') {
mega64 146:03e976389d16 93 serial_putc(&stdio_uart, '\r');
mega64 146:03e976389d16 94 }
mega64 146:03e976389d16 95 serial_putc(&stdio_uart, buffer[i]);
mega64 146:03e976389d16 96 stdio_out_prev = buffer[i];
mega64 146:03e976389d16 97 }
mega64 146:03e976389d16 98 #else
mega64 146:03e976389d16 99 for (unsigned int i = 0; i < size; i++) {
mega64 146:03e976389d16 100 serial_putc(&stdio_uart, buffer[i]);
mega64 146:03e976389d16 101 }
mega64 146:03e976389d16 102 #endif
mega64 146:03e976389d16 103 }
mega64 146:03e976389d16 104 core_util_critical_section_exit();
mega64 146:03e976389d16 105 #endif
mega64 146:03e976389d16 106 }