mirror of
https://github.com/ByteWelder/Tactility.git
synced 2026-10-17 02:45:05 +00:00
147 lines
4.8 KiB
Plaintext
147 lines
4.8 KiB
Plaintext
/dts-v1/;
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#include <tactility/bindings/root.h>
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#include <tactility/bindings/esp32_ble.h>
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#include <tactility/bindings/esp32_wifi_pinned.h>
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#include <tactility/bindings/esp32_gpio.h>
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#include <tactility/bindings/esp32_i2c_master.h>
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#include <tactility/bindings/esp32_spi.h>
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#include <tactility/bindings/esp32_adc_oneshot.h>
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#include <tactility/bindings/esp32_usbdevice.h>
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#include <tactility/bindings/battery_sense.h>
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#include <tactility/bindings/gpio_hog.h>
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#include <bindings/button_control.h>
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#include <bindings/ssd1306.h>
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#include <bindings/sx1262.h>
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/ {
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compatible = "root";
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model = "Heltec WiFi LoRa 32 V3";
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wifi0 {
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compatible = "espressif,esp32-wifi-pinned";
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};
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ble0 {
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compatible = "espressif,esp32-ble";
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};
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gpio0 {
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compatible = "espressif,esp32-gpio";
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gpio-count = <49>;
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};
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// Board power-enable pins. Must be asserted before the dependent devices below start, since
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// devicetree devices are constructed and started during kernel_init(), earlier than the
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// deprecated HAL's initBoot() used to run. gpio-hog nodes run in declaration order, so they
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// must stay before their dependents.
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oled_power_en {
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// Active low (external pull-up on the board).
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compatible = "gpio-hog";
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pin = <&gpio0 36 GPIO_FLAG_NONE>;
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mode = <GPIO_HOG_MODE_OUTPUT_LOW>;
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};
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adc_ctrl_en {
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compatible = "gpio-hog";
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pin = <&gpio0 37 GPIO_FLAG_NONE>;
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mode = <GPIO_HOG_MODE_OUTPUT_LOW>;
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};
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i2c_internal {
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compatible = "espressif,esp32-i2c-master";
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port = <I2C_NUM_0>;
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clock-frequency = <200000>;
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pin-sda = <&gpio0 17 GPIO_FLAG_NONE>;
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pin-scl = <&gpio0 18 GPIO_FLAG_NONE>;
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display0 {
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compatible = "solomon,ssd1306";
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reg = <0x3C>;
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horizontal-resolution = <128>;
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vertical-resolution = <64>;
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pin-reset = <&gpio0 21 GPIO_FLAG_NONE>;
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// oled_power_en above only just asserted the OLED's power rail moments earlier in
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// the same kernel_init() pass - matches the deprecated HAL's old
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// enableOledPower()'s explicit 500ms settle delay before touching the chip.
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power-on-delay-ms = <500>;
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// Vendor bring-up sequence, carried over unchanged from the deprecated HAL's old
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// Ssd1306Display.cpp (its own comment: "esp_lcd_panel_init() ... doesn't configure
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// correctly for Heltec V3!"). Each byte is its own SSD1306 command - see
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// ssd1306-module's init-sequence binding property for the encoding.
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init-sequence = [
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0xAE // Display off while configuring
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0xD5 0xF0 // Set oscillator frequency (~96 Hz) - must come early in the sequence
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0xA8 0x3F // Set multiplex ratio (vertical-resolution - 1 = 64 - 1)
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0xD3 0x00 // Set display offset
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0x40 // Set display start line = 0
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0x8D 0x14 // Enable charge pump - must be before memory mode
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0x20 0x00 // Horizontal addressing mode
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0xA1 // Segment remap (Heltec V3 orientation)
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0xC8 // Scan direction reversed
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0xDA 0x12 // COM pin config (alternate, for 64-row displays)
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0x81 0xCF // Contrast
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0xD9 0xF1 // Pre-charge period
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0xDB 0x40 // VCOMH deselect level
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0x21 0x00 0x7F // Column address range: 0 to (horizontal-resolution - 1)
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0x22 0x00 0x07 // Page address range: 0 to 7 (for a 64-row display)
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0xA7 // Display invert - required for this panel's wiring
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0x2E // Stop scroll
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0xAF // Display on
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];
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};
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};
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spi0 {
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compatible = "espressif,esp32-spi";
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host = <SPI2_HOST>;
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cs-gpios = <&gpio0 8 GPIO_FLAG_NONE>; // 0: LoRa radio (SX1262)
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pin-mosi = <&gpio0 10 GPIO_FLAG_NONE>;
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pin-miso = <&gpio0 11 GPIO_FLAG_NONE>;
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pin-sclk = <&gpio0 9 GPIO_FLAG_NONE>;
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// SX1262 LoRa transceiver: RST/BUSY/DIO1 = GPIO 12/13/14, TCXO 1.8 V,
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// DIO2 drives the antenna TX/RX switch.
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radio@0 {
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compatible = "semtech,sx1262";
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reg = <0>;
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pin-reset = <&gpio0 12 GPIO_FLAG_NONE>;
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pin-dio1 = <&gpio0 14 GPIO_FLAG_NONE>;
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pin-busy = <&gpio0 13 GPIO_FLAG_NONE>;
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tcxo-millivolts = <1800>;
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dio2-as-rf-switch;
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};
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};
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adc0 {
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compatible = "espressif,esp32-adc-oneshot";
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unit-id = <ADC_UNIT_1>;
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channels = <ADC_CHANNEL_3 ADC_ATTEN_DB_12 ADC_BITWIDTH_DEFAULT>;
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};
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// Matches the deprecated HAL's old Power.cpp: ADC1 CH3 behind a 2:1 divider, with +0.11
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// added as display voltage sag compensation (adcMultiplier = 2.11, so multiplier = 2110).
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// reference-voltage-mv is the nominal full-scale value at ADC_ATTEN_DB_12 (battery-sense has
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// no calibration path, unlike the old driver's raw-scaling formula).
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battery-sense {
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compatible = "battery-sense";
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io-channel = <&adc0 0>;
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reference-voltage-mv = <3300>;
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multiplier = <2110>;
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};
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buttons {
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compatible = "tactility,button-control";
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pin-primary = <&gpio0 0 GPIO_FLAG_NONE>;
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};
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usbdevice0 {
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compatible = "espressif,esp32-usbdevice";
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usbdevicemsc0 {
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compatible = "espressif,esp32-usbdevice-msc";
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};
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};
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};
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