Search found 135 matches
- Mon May 18, 2020 8:00 am
- Forum: Pyboard D-series
- Topic: Emulation of multiple I2C slaves with a Pyboard D-series
- Replies: 2
- Views: 2595
Re: Emulation of multiple I2C slaves with a Pyboard D-series
STM32F7xx supports two slave addresses in HW plus one broadcast (ADDR 0). MP currently supports only one slave address.
- Tue May 12, 2020 3:41 pm
- Forum: Pyboard D-series
- Topic: Flash ROM, external QSPI, v1.1 vs. D's three variants
- Replies: 3
- Views: 2954
Re: Flash ROM, external QSPI, v1.1 vs. D's three variants
PYBV11 has 1024kB of internal flash. Due to the it's sector organization only 112kB can be used as FAT filesystem. The FAT area consists of one 3*16kB and 1*64kB sectors. As flash can only erased sector wise, a RAM buffer is needed for buffering content. PYBV11 reserves 64kB of SRAM for this purpose...
- Sun May 10, 2020 3:10 pm
- Forum: Pyboard D-series
- Topic: PYBD WBUS connector
- Replies: 22
- Views: 17104
Re: PYBD WBUS connector
According to Hirose specs the four extra pins on the 40 pin connectors are only for mechanical stability. They can't be used as extra contacts.
- Tue May 05, 2020 2:33 pm
- Forum: Pyboard D-series
- Topic: Choosing between powering options.
- Replies: 4
- Views: 3317
Re: Choosing between powering options.
Power requirements are defined by these components: Wireless Module (Murata 1DX) The Wireless Module uses an internal linear regulator for the wireless transmitter. See Murata datasheets for the specs. ADC Reference ADC performs best with a stable +3.3V reference voltage which is provided with a pro...
- Fri Feb 21, 2020 9:43 am
- Forum: General Discussion and Questions
- Topic: Serial binary data packets using COBS and uasyncio
- Replies: 6
- Views: 4493
Re: Serial binary data packets using COBS and uasyncio
Would it make senses to use either 3964 or 3964R protocol?
- Thu Jan 16, 2020 11:57 am
- Forum: Pyboard D-series
- Topic: Pyboard D RTC accuracy
- Replies: 5
- Views: 3911
Re: Pyboard D RTC accuracy
This sounds too good to be true. Doesn't the DS3231 datasheet claim +/-2 ppm which (roughly) means +/-1 min/a?
Anyhow, this is still a very good result.
Anyhow, this is still a very good result.
- Mon Dec 30, 2019 8:06 pm
- Forum: MicroPython pyboard
- Topic: pyb.ADCAll() side effect
- Replies: 13
- Views: 9730
Re: pyb.ADCAll() side effect
1. Note that core_vbat refers to the RTC backup battery. To read supply voltage use vref.
2. core_temp is stored in cor_dat[3]!
3. On a PYBD will never be bigger than 3.3V (well +/- some error) due to the LDO used for Vdd.
2. core_temp is stored in cor_dat[3]!
3. On a PYBD will never be bigger than 3.3V (well +/- some error) due to the LDO used for Vdd.
- Sun Dec 15, 2019 5:25 pm
- Forum: General Discussion and Questions
- Topic: Changing LED colour on USR button press
- Replies: 3
- Views: 2417
Re: Changing LED colour on USR button press
try this: import pyb sw = pyb.Switch() leds = [pyb.LED(1), pyb.LED(2), pyb.LED(3)] led_state = 0 def cycle(): global led_state print(led_state) led_state = (led_state % 3) if led_state == 0: led_state = 1 leds[0].on() leds[1].off() leds[2].off() elif led_state == 1: led_state = 2 leds[0].off() leds[...
- Tue Oct 22, 2019 9:44 am
- Forum: Pyboard D-series
- Topic: WBUS-DIP28 reset pin does not reset the Pyboard
- Replies: 5
- Views: 3390
Re: WBUS-DIP28 Please could someone try this
NRST isn't connected to WBUS-DIP28 by design (and the route should not be in the schema). It might be a bit inconvenient but DIP28 NRST can be connected to PYBD NRST by a bodge wire or, and this made more sense to the designer, handle DIP28 NRST through another GPIO. With NRST being hard wired betwe...
- Tue Oct 22, 2019 9:05 am
- Forum: Pyboard D-series
- Topic: Gerber files for d series?
- Replies: 5
- Views: 3680
Re: Gerber files for d series?
The PYBD was designed to allow a regular DIP-16-600 footprint if only X-SKIN is used. Y-SKIN ports are also placed to form a regular DIP-16-600 footprint but interleaved and rotated by 180 deg to the X-SKIN ports. Note that pins 16, 15 and 13 are different for the X and Y SKIN footprints. This allow...