rolandvs

#include STM32_HAL_H
#include "mpconfigboard.h"

void STM32F091RC_board_early_init(void) {
#if defined(MICROPY_HW_MCO)
/* redirect to:       source RCC_MCOSource:       prescaler RCC_MCODiv:
 * RCC_MCO1: PA8      RCC_MCO1SOURCE_HSI          RCC_MCODIV_1
 * RCC_MCO2: PC9      RCC_MCO1SOURCE_LSE          RCC_MCODIV_2
 *                    RCC_MCO1SOURCE_HSE          RCC_MCODIV_3
 *                    RCC_MCO1SOURCE_PLLCLK       RCC_MCODIV_4

rolandvs

# NUCLEO_STMF091RC
The NUCLEO boards have `ST-morpho` connectors and the `Arduino` connectors so anyone can hook up his/her favourite interfaces.

Please refer to document: [UM1724](https://www.st.com/content/ccc/resource/technical/document/user_manual/98/2e/fa/4b/e0/82/43/b7/DM00105823.pdf/files/DM00105823.pdf/jcr:content/translations/en.DM00105823.pdf)

## Arduino Serial Port
If one would like to use the Arduino connector to connect to a shield, you will run into trouble when the serial interface needs to be used.

The `NUCLEO_F091RC` PCB is not completely configured to work using the standard serial port; the `D0/D1` pins that refer to `PA3/PA2` for UART communication are simply **NOT** connected!

rolandvs

# µPing (MicroPing) for MicroPython
# copyright (c) 2018 Shawwwn <[email protected]>
# License: MIT

# Internet Checksum Algorithm
# Author: Olav Morken
# https://github.com/olavmrk/python-ping/blob/master/ping.py
# @data: bytes
def checksum(data):
    if len(data) & 0x1: # Odd number of bytes

rolandvs

Use of jupyter, docker and a few more to go beyond static gui display ... 

  https://github.com/jgoerner/beyond-jupyter