STM32MP1 Primer – Day 4

This is Day 4 of our lecture series and thus far the stars of the show have been OpenSTLinux and the Cortex-A7. Wait a minute. We have access to a Cortex-M4 capable of running in excess of 200 MHz. With that today's discussion will focus on loading up the Cortex-M4 with a TOF (Time of Flight) application. We'll start the project from scratch and take a look at what it takes to configure our Cortex-M4 using the same STM32CubeMX and STM32CubeIDE environment we have been using all week. The Cortex-M4 that is native to the STM32MP157x hardware does not have access to standard flash program memory. Instead, we have 448K of embedded SRAM that we can fill with our Cortex-M4 application code. Despite the talents possessed by the Cortex-M4we still need OpenSTLinux to assist us in getting the Cortex-M4 code loaded and kicked off. Since OpenSTLinux must be running anyway along the way we'll see if we can offload any of the TOF application tasks to the Cortex-A7. The STM32MP157x-DKx discovery boards are fitted with an Arduino pin set on the bottom side of the board. This is a great time to introduce some home brewed Arduino-click-STM32MP1 interface hardware.