MicroPython Forum (Archive)

Thank you,

I hase choose the option 2

Hello, I try to generate a mpy file from a c lib file. When the makefile link the lib, I have an undefined symbol error LINK build/iaq_1st_gen.o qstr vals: py_init_iaq_1st_gen qstr objs: LinkError: lib_iaq_1st_gen.o: undefined symbol: __divsf3 make: *** [../../../../../../../_codes/micropython/micro...

You could try to use viper code, which is translated directly into machine instruction, like: BIT15 = const(1 << 15) import stm @micropython.viper def SCS_tick(self, tim): gpiod = ptr16(stm.GPIOD + stm.GPIO_BSRRL) gpiod[0] = BIT15 # set BIT15 high gpiod[1] = BIT15 # set BIT15 low That should result...

it's with the code below!! if i do a loop: while (1): scs.mon_driver_SCS.SCS_tick(0) the pulse width is also 4.8µs and the time between 2 pulse is 45µs if i insert a sleep: @micropython.native def SCS_tick(self,tim): # le callback passe le timer import stm import time BIT15 = const(1 << 15) stm.mem1...

Hello, I set/reset a pin in an interrupt to see the time of the interrupt. the frequency of the CPU is 168MHz (STM32F407 Discovery) I enter in the interrupt all 34.7µs (it's OK) But the width of the impulsion is 4.8µs with all optimizations (it's too bigger). In C, the impulsion is several nano seco...