MicroPython Forum (Archive)

I just cloned the latest micropython and get the following error with make BOARD=PYBV10 MICROPY_PY_WIZNET5K=1 CC modnwwiznet5k.c In file included from ../py/objlist.h:29:0, from modnwwiznet5k.c:33: modnwwiznet5k.c:449:23: error: 'MP_QSTR_ifconfig' undeclared here (not in a function) { MP_OBJ_NEW_QST...

The adc.read_timed() is clocked by timer 6 and can run up to 84MHz. The accuracy of the timer is dictated by the MCU's crystal spec of 30 ppm. I measured the crystal frequency accuracy on my pyboard at 33 ppm. Ultimately, your adc_read_time() frequency shouldn't exceed the time for the ADC to collec...

on my linux system with python2 and python3 the following test produces 12 integers, on pyboard only one integer ??? import struct v = b'\x19\x9c\x02\x03\xeb\x00\x00\r\xea\x00\x00\x0f\x99\x98\x08\xa8\xda\xcd\x949\x97\x95\xde\xe1\xc32\x00\x00\x00\x00\x00\x00\x00\x00\xd9C\x9cr\x1bK\x18\xe5\xd9C\x9c|\x...

well, since ifconfig() didn't seem to be working , I instead modified the defaults (ip, gateway) in the firmware's modnwwiznet5k.c, and re-flashed the firmware. Now CREGs looks OK and I could ping the wiznet module .... more tests coming. Wiz CREG: 0000: 00 c0 a8 01 01 ff ff ff 00 00 08 dc ab cd ef ...

reviving this thread, as I try some pyboard experiments with SPI and wiz820io (W5200). I just did some teensy tests with the wiznet module, and all was well. so I enabled wiznet stuff in pyboard firmware and hooked up the SPI1 jumpers and reset jumper and common ground (seperate 3.3v power for wiz82...

dhylands has an example of measuring pulse width using timer callback, see

https://github.com/dhylands/upy-example ... ic_test.py

There are various makes and models of SPI flash. They share a "mostly" standard set of SPI commands. The ESP8266 has an onboard winbond SPI flash. I did some pyboard tests with the Adafruit 1MB 8-pin DIP chip. http://www.adafruit.com/product/1564 pyboard SPI flash tests: I developed/hacked a "classl...

I did some experiments with memcpy() on pyboard (168mhz). memcpy() is used in the firmware by the interpeter and for doing various support services, e.g. memory copies for flash. memcpy() is implemented in C in lib/libc/string0.c. If the source and destination are word-aligned, then a loop copies wo...

IO performance of SD, SPI SD, and FLASH: (pyboard) (taking advantage of the thread subject) Here are some anecdotal results comparing write/read speeds of SD, SPI SD, and FLASH on pyboard. In the following thread, http://forum.micropython.org/viewtopic.php?f=2&p=3395#p3665 it was noted that the SD ...

clever!

works for me (Ubuntu 14.04, python 3.4).