@@ -10,6 +10,8 @@ ST micros require an ST-Link for programming and debugging, which is a dedicated
And lastly [here's the actual frequency response of the LC circuit changing as a large chunk of aluminum is brought over the coil](./images/frequency_response.mp4) It's hard to make out, but it's varying between 1.4 and 1.6 MHz, where frequency increases with the presence of aluminum. Steel had a similar, but slightly less prominent response (although the two pieces of metal were very different sizes so don't read into that too much). The steel target also reduced the amplitude of the response, and yielded cleaner, presumably less noisy oscilations.
For next week, here's a nice blog post I found about [speeding up HAL's SPI transactions.](https://keepdevelopingprojects.wordpress.com/2020/09/09/reducing-stm32-spi-hal-latency/) One good reason to prefer ST to Atmel/Microchip here is that CubeMX generates MCU-specific initialization code, and actually going in to speed things up involves appreciably less searching for registers in datasheets.
