Titlebook: Beginning STM32; Developing with Free Warren Gay Book 20181st edition Warren Gay 2018 STM32.STM32F103.STM32F103C8T6.ARM.ARM Cortex.Cortex-M

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USART,The Blue Pill PCB provides one GPIO-controlled LED to communicate by. Needless to say, this would be limiting if it were all you had. Perhaps the best early-development peripheral to pursue for communication is the USART (Universal Synchronous/Asynchronous Receiver/Transmitter).

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SPI Flash,As resourceful as the STM32 MCU is, sometimes you need additional persistent data storage. Small applications may leave leftover program flash storage that can be utilized, but if you are collecting larger amounts of data, you will probably look to a serial flash solution.

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Real-Time Clock (RTC),Tracking time is often important in applications. For this reason, the STM32 platform provides a built-in real-time clock (RTC) peripheral. The datasheets for the RTC appear almost trivial to use, but there are wrinkles waiting for the unwary.

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OLED,The OLED (organic light-emitting diode) provides the hobbyist with an exciting form of low-cost display. Because they are based upon LEDs, they require no backlighting like an LCD device does, nor polarizing filters. This equates to lower cost.

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