MicroPython Forum (Archive)

Thank you mcauser. I'm a MicroPython newbie, and I've just started looking at source code. I've done some more tests. Servo: >>> sr=pyb.Servo(1) >>> sr.angle(-90) >>> sr.angle(90) >>> sr.angle(-90) >>> sr.angle(90) >>> sr.angle() 85 >>> sr.angle(-90) >>> sr.angle() -79 >>> sr.angle(-90) >>> sr.angle...

Indeed one more mistake. You need to put #define MICROPY_HW_RTC_USE_LSE (1) ***AFTER*** pll definitions or you'll get wrong cpu freq. e.g.: #define STM32F407COREV #define MICROPY_HW_BOARD_NAME "Black STM32F407CORE (8MHz HSE)" #define MICROPY_HW_MCU_NAME "STM32F407" #define MICROPY_HW_HAS_SWITCH (1) ...

Finally, I got it! >>> rtc=pyb.RTC() >>> rtc.datetime() (2000, 1, 1, 1, 1, 38, 47, 22) >>> rtc.datetime((2017,3,6,1,11,25,0,0)) >>> rtc.datetime() (2017, 3, 6, 1, 11, 25, 2, 0) **************************** SOFT RESET **************************** >>> rtc=pyb.RTC() >>> rtc.datetime() (2017, 3, 6, 1, 1...

So the answer (IMHO):"It's not a HW problem" I compiled a test sketch in Arduino (STM32Arduino). It's not easy to work with F4 because of preliminary Arduino support. Anyway there is a RTC lib which lacks of maintainer=xxx def (yes, it blocks building :-) ). I've manually uploaded .bin with stm32fla...

I made some more tests. I've changed battery with a new one (no difference) and made some run without battery (same results). Here also some rtc.info() >>> rtc.datetime() (2015, 1, 1, 4, 0, 0, 0, 255) >>> rtc=pyb.RTC() Traceback (most recent call last): File "<stdin>", line 1 SyntaxError: invalid sy...

>>> >>> rtc=pyb.RTC() >>> rtc.datetime() (2015, 1, 1, 4, 0, 0, 0, 255) >>> rtc.datetime((2017,3,5,7,7,28,30,0)) >>> rtc.datetime() (2017, 3, 5, 7, 7, 28, 33, 236) >>> Traceback (most recent call last): File "<stdin>", line 1 SyntaxError: invalid syntax >>> >>> rtc=pyb.RTC() >>> rtc.datetime() (2015...

Ok, found dot on pcb. Dot on chip is the small one. Pin6 ->3.1v.

I'm thinking about a test with stm32arduino just to check rtc healt. Anyway now in Italy is midnight... so.... eventually tomorrow...

Thanks again!

I found pinout somewhere, the first one on line. Vbat -> pin 6. On that pin (maybe i'm wrong, they're tiny) 3.1v.

I'm not sure also about pin numbering because chip has two 'dots'. Anyway seems correct.

Thank you for your help.

It works, set, but reset on power cycle. Backup battery is ok. Strange. Seems like hw failure or something. Machine.RTC should be more tight to hw, were pyb sounds like a wrapper (newbie hunch)

Well, RTC seems have major trouble: >>> rtc = machine.RTC() Traceback (most recent call last): File "<stdin>", line 1, in <module> AttributeError: 'module' object has no attribute 'RTC' >>> machine.freq() (168000000, 168000000, 42000000, 84000000) >>> machine.unique_id() b'G\x001\x00\x16Q606478' ......