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DSudo.2 · 2023-09-20

Is there a way to read an environment variable from the PC (I'm running on a Windows box) and pass that value somehow (maybe via a temporarily created define for the command line) such that a file being compiled can use the value of that environment ...

DSudo.2 · 2023-06-01

The USART section states that all 4 USARTs can be clocked from a common set of 4 clock sources, but doesn't reference how to specify the clock for USART4 either.

DSudo.2 · 2023-06-01

When I search for APB1 in the reference manual, in the context of a register field, it does not show up (other than in the clock tree figure). This controls the frequency that goes to the timer peripherals. Additionally, this figure shows "x1" or "x2...

DSudo.2 · 2023-09-20

Accepted as solution, but after further investigation https://gcc.gnu.org/onlinedocs/gcc-4.8.5/cpp/Stringification.html there is no way to convert a macro argument into a character constant, and gcc generates an error any way I try to convert USERNAM...

DSudo.2 · 2023-06-02

Thanks so much for the quick answers, and the helpful hint about the USART3 clock source. I had missed that note about it only applying to F09x devices!

DSudo.2 · 2023-06-02

Thanks so much for the quick answers... I really appreciate it.

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Read environment variable during build and pass value to file to be compiled

STM32F072 Clock tree section shows how to select clock for USARTS 1-3, but not USART4. Were in the reference manual (RM0091 Rev 10) does it show how to select the clock source for USART4?

STM32F072 Clock tree figure in reference manual shows APB1 prescaler, but where is that defined in the reference manual?

Re: Read environment variable during build and pass value to file to be compiled

Re: STM32F072 Clock tree section shows how to select clock for USARTS 1-3, but not USART4. Were in the reference manual (RM0091 Rev 10) does it show how to select the clock source for USART4?

Re: STM32F072 Clock tree figure in reference manual shows APB1 prescaler, but where is that defined in the reference manual?