From 2f1ee282c361200463b3065a9b27a97f6c32f674 Mon Sep 17 00:00:00 2001 From: Thomas Farstrike Date: Tue, 24 Feb 2026 08:28:04 +0100 Subject: [PATCH] Comments --- .../lib/mpos/board/fri3d_2026.py | 24 ++++++++++++------- 1 file changed, 15 insertions(+), 9 deletions(-) diff --git a/internal_filesystem/lib/mpos/board/fri3d_2026.py b/internal_filesystem/lib/mpos/board/fri3d_2026.py index 9035345d..90950c1d 100644 --- a/internal_filesystem/lib/mpos/board/fri3d_2026.py +++ b/internal_filesystem/lib/mpos/board/fri3d_2026.py @@ -187,12 +187,6 @@ indev.set_display(disp) # different from display indev.enable(True) # NOQA InputManager.register_indev(indev) -# Battery voltage ADC measuring: sits on PC0 of CH32X035GxUx -from mpos import BatteryManager -def adc_to_voltage(adc_value): - return (0.001651* adc_value + 0.08709) -#BatteryManager.init_adc(13, adc_to_voltage) # TODO - import mpos.sdcard mpos.sdcard.init(spi_bus=spi_bus, cs_pin=14) @@ -207,12 +201,24 @@ from machine import PWM, Pin # The DAC uses BCK (bit clock) on GPIO 2, while the microphone uses SCLK on GPIO 17 # See schematics: DAC has BCK=2, WS=47, SD=16; Microphone has SCLK=17, WS=47, DIN=15 +# recording and playback at the same time: +# - no issue for the headset +# - communicator: must be same sample rate because shared sck 17 BUT this will result in feedback, probably +# fix: playback headset speaker, record communicator microphone: should work +# fix: playback communicator speaker, record headset microphone: should work +# TODO: +# - revamp to multiple audio framework so all 4 items can be defined: 2 speakers (hss, cs) and 2 microphones (hsm, cm) +# - try each 4 of the items separately: hss, hsm, cs, cm +# - try trivial combinations: hss + hsm, cs + cm +# - try similar combinations: hss + cs, cm + hsm +# - try cross combinations: hss + cm, cs + hsm + i2s_pins = { - # Output (DAC/speaker) pins - 'mck': 2, # MCLK (mandatory) - 'sck': 17, # SCLK aka BCLK (unclear if optional or mandatory) 'ws': 47, # Word Select / LRCLK shared between DAC and mic (mandatory) + # Output (DAC/speaker) pins 'sd': 16, # Serial Data OUT (speaker/DAC) + 'sck': 17, # SCLK aka BCLK (appears mandatory) BUT this pin is sck_in on the communicator + 'mck': 2, # MCLK (mandatory) BUT this pin is sck on the communicator } # Initialize AudioManager with I2S (buzzer TODO)