As someone who has only done 8-bit (AVR), 32-bit was always a homework that I had to overcome. ChrisP's lecture, which I found by chance in 2020, cut off my worries. From the debug environment, GPIO, timer, UART, sensor calibration and SPI & I2C communication, EEPROM protocol, parsing of transmitted and received data (message), and finally PID theory and implementation, etc., it is really, really the best. I listened happily for a month without realizing the time passing. Thank you again for the passionate lecture.