MicroPython Forum (Archive)

The general approach is as follows. Create a bytearray to hold a single cycle of sine wave, and populate it with data scaled to lie in the range 0-255 (for a 8-bit DAC). Then use a timer interrupt to output a value from the array and increment the array pointer (modulo the length of the array). The...

hi @weiLin

I did not understand much from the code on github. Can you write a simple code that generates a simple sine wave? Is it possible to adjust the phase, amplitude and offset of the wave.
I will use on ESP32.

Hi I can generate a sine wave with this code on ESP32. But can't change the frequency. It s always 26.12Hz. How can I change the frequency. Or How can I generate a sine wave that can change its frequency import ulab as np from math import* import _thread as th from machine import DAC, ADC, Pin impor...

I can load this firmware successfully. But this ulab is not full. https://gitlab.com/rcolistete/micropython-firmwares/-/tree/master/ESP32/v1.12_with_ulab/ulab_v0.54.0_2020-07-29/Generic_flash-4MB But when I load this firmware, this error occurs. It seems successfully loaded but the ESP32 always busy...

I uploaded newly esp32 with ulab firmware
After uploaded the device seems busy and this error mesage in shell.

rst : 0x10 (RTCWDT _ RTC. RESET) , boot : 0x13 (SPI FAST_B00T ' ) g
configsip : 0li SPIWP : 0xen.E::ii
lk' drv : OXOO' q,,..dfv : Ox00 , d drv : OxOO , csO ciTY : O,

Thank you for answers

Unfortunately.

Cant install.

And cant see that anyone install it for esp32. No videos no document.
I m depressed

Hi I urgently need a help please. I have ESP32 WROOM 32. Installed micropython-1.18.zip (113MiB). Installed Thonny , UPyCraft, But When try to install ulab in Thonny, it doesn't find. Yesterday I saw this topic and tried to install firmware with ulab. https://gitlab.com/rcolistete/micropython-firmwa...