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Re: F303 and 4" LCD for next generation NanoVNA #circuit #flash_size #improvement #enclosure #battery

 

Sam,

No need to use such primitive methods like were necessary on 1980s micros.
STM32 MCUs have a MCU device ID code. I didn't bother to look at the
STM32F072 details, but on the STM32303 it's register DBGMCU_IDCODE
address 0xE004
2000 32-bit read-only. See the STM32F303xB/C/D/E Reference Manual for
details. I'm sure Gabriel is already aware of this because the Reference
is a constant companion for a software developer.

I used STM32F4 MCUs the last 5 years of my career before retiring in 2017.

Larry AC8YE

On Sun, Dec 29, 2019 at 2:50 PM Sam Reaves <sam.reaves@...> wrote:

If the new version has a I/O pin that normally floats or is pulled high on
the original version the same pin could be permanently tied to ground on
the new version the firmware could test for this bit and load the
appropriate option for the number of displayed points or any other
differences that need to be set.

Sam Reaves
ARS W3OHM
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