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xiao-nrf52 : initial support for meshcore

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initial config for xiao_nrf52

repeater role for xiao-nrf52

xiao-nrf52 correction on bat voltage

xiao-nrf52 this file should not be here ...
This commit is contained in:
Florent de Lamotte
2025-04-07 18:14:39 +02:00
committed by Florent
parent d7e6a361b5
commit 82bcd74932
8 changed files with 621 additions and 0 deletions
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61
boards/seeed-xiao-afruitnrf52-nrf52840.json Normal file
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{
"build": {
"arduino": {
"ldscript": "nrf52840_s140_v7.ld"
},
"core": "nRF5",
"cpu": "cortex-m4",
"extra_flags": "-DARDUINO_Seeed_XIAO_nRF52840 -DNRF52840_XXAA -DSEEED_XIAO_NRF52840 ",
"f_cpu": "64000000L",
"hwids": [
[ "0x2886", "0x8044" ],
[ "0x2886", "0x0044" ]
],
"mcu": "nrf52840",
"variant": "Seeed_XIAO_nRF52840",
"softdevice": {
"sd_flags": "-DS140",
"sd_name": "s140",
"sd_version": "7.3.0",
"sd_fwid": "0x0123"
},
"bsp": {
"name": "adafruit"
},
"bootloader": {
"settings_addr": "0xFF000"
},
"usb_product": "XIAO nRF52840"
},
"connectivity": [
"bluetooth"
],
"debug": {
"jlink_device": "nRF52840_xxAA",
"openocd_target": "nrf52.cfg",
"svd_path": "nrf52840.svd"
},
"frameworks": [
"arduino"
],
"name": "Seeed Studio XIAO nRF52840",
"upload": {
"maximum_ram_size": 237568,
"maximum_size": 811008,
"protocol": "nrfutil",
"speed": 115200,
"protocols": [
"jlink",
"nrfjprog",
"nrfutil",
"cmsis-dap",
"sam-ba",
"blackmagic"
],
"use_1200bps_touch": true,
"require_upload_port": true,
"wait_for_upload_port": true
},
"url": "https://wiki.seeedstudio.com/XIAO_BLE",
"vendor": "Seeed Studio"
}

91
src/helpers/nrf52/XiaoNrf52Board.cpp Normal file
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#include <Arduino.h>
#include "XiaoNrf52Board.h"
#include <bluefruit.h>
#include <Wire.h>
static BLEDfu bledfu;
static void connect_callback(uint16_t conn_handle)
{
(void)conn_handle;
MESH_DEBUG_PRINTLN("BLE client connected");
}
static void disconnect_callback(uint16_t conn_handle, uint8_t reason)
{
(void)conn_handle;
(void)reason;
MESH_DEBUG_PRINTLN("BLE client disconnected");
}
void XiaoNrf52Board::begin() {
// for future use, sub-classes SHOULD call this from their begin()
startup_reason = BD_STARTUP_NORMAL;
pinMode(PIN_VBAT, INPUT);
pinMode(VBAT_ENABLE, OUTPUT);
digitalWrite(VBAT_ENABLE, HIGH);
#if defined(PIN_WIRE_SDA) && defined(PIN_WIRE_SCL)
Wire.setPins(PIN_WIRE_SDA, PIN_WIRE_SCL);
#endif
Wire.begin();
#ifdef P_LORA_TX_LED
pinMode(P_LORA_TX_LED, OUTPUT);
digitalWrite(P_LORA_TX_LED, HIGH);
#endif
// pinMode(SX126X_POWER_EN, OUTPUT);
// digitalWrite(SX126X_POWER_EN, HIGH);
delay(10); // give sx1262 some time to power up
}
bool XiaoNrf52Board::startOTAUpdate(const char* id, char reply[]) {
// Config the peripheral connection with maximum bandwidth
// more SRAM required by SoftDevice
// Note: All config***() function must be called before begin()
Bluefruit.configPrphBandwidth(BANDWIDTH_MAX);
Bluefruit.configPrphConn(92, BLE_GAP_EVENT_LENGTH_MIN, 16, 16);
Bluefruit.begin(1, 0);
// Set max power. Accepted values are: -40, -30, -20, -16, -12, -8, -4, 0, 4
Bluefruit.setTxPower(4);
// Set the BLE device name
Bluefruit.setName("XIAO_NRF52_OTA");
Bluefruit.Periph.setConnectCallback(connect_callback);
Bluefruit.Periph.setDisconnectCallback(disconnect_callback);
// To be consistent OTA DFU should be added first if it exists
bledfu.begin();
// Set up and start advertising
// Advertising packet
Bluefruit.Advertising.addFlags(BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE);
Bluefruit.Advertising.addTxPower();
Bluefruit.Advertising.addName();
/* Start Advertising
- Enable auto advertising if disconnected
- Interval: fast mode = 20 ms, slow mode = 152.5 ms
- Timeout for fast mode is 30 seconds
- Start(timeout) with timeout = 0 will advertise forever (until connected)
For recommended advertising interval
https://developer.apple.com/library/content/qa/qa1931/_index.html
*/
Bluefruit.Advertising.restartOnDisconnect(true);
Bluefruit.Advertising.setInterval(32, 244); // in unit of 0.625 ms
Bluefruit.Advertising.setFastTimeout(30); // number of seconds in fast mode
Bluefruit.Advertising.start(0); // 0 = Don't stop advertising after n seconds
strcpy(reply, "OK - started");
return true;
return false;
}

75
src/helpers/nrf52/XiaoNrf52Board.h Normal file
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#pragma once
#include <MeshCore.h>
#include <Arduino.h>
// LoRa radio module pins for Seeed Xiao-nrf52
#ifdef SX1262_XIAO_S3_VARIANT
#define P_LORA_DIO_1 D0
#define P_LORA_BUSY D1
#define P_LORA_RESET D2
#define P_LORA_NSS D3
#define LORA_TX_BOOST_PIN D4
#else
#define P_LORA_DIO_1 D1
#define P_LORA_BUSY D3
#define P_LORA_RESET D2
#define P_LORA_NSS D4
#define LORA_TX_BOOST_PIN D5
#endif
#define P_LORA_SCLK PIN_SPI_SCK
#define P_LORA_MISO PIN_SPI_MISO
#define P_LORA_MOSI PIN_SPI_MOSI
//#define SX126X_POWER_EN 37
#define SX126X_DIO2_AS_RF_SWITCH true
#define SX126X_DIO3_TCXO_VOLTAGE 1.8
class XiaoNrf52Board : public mesh::MainBoard {
protected:
uint8_t startup_reason;
public:
void begin();
uint8_t getStartupReason() const override { return startup_reason; }
#if defined(P_LORA_TX_LED)
void onBeforeTransmit() override {
digitalWrite(P_LORA_TX_LED, LOW); // turn TX LED on
}
void onAfterTransmit() override {
digitalWrite(P_LORA_TX_LED, HIGH); // turn TX LED off
}
#endif
uint16_t getBattMilliVolts() override {
// Please read befor going further ;)
// https://wiki.seeedstudio.com/XIAO_BLE#q3-what-are-the-considerations-when-using-xiao-nrf52840-sense-for-battery-charging
pinMode(BAT_NOT_CHARGING, INPUT);
if (digitalRead(BAT_NOT_CHARGING) == HIGH) {
int adcvalue = 0;
analogReadResolution(12);
analogReference(AR_INTERNAL_3_0);
digitalWrite(VBAT_ENABLE, LOW);
delay(10);
adcvalue = analogRead(PIN_VBAT);
digitalWrite(VBAT_ENABLE, HIGH);
return (adcvalue * ADC_MULTIPLIER * AREF_VOLTAGE) / 4.096;
} else {
digitalWrite(VBAT_ENABLE, HIGH); // ensures high !
return 4200; // charging value
}
}
const char* getManufacturerName() const override {
return "Seeed Xiao-nrf52";
}
void reboot() override {
NVIC_SystemReset();
}
bool startOTAUpdate(const char* id, char reply[]) override;
};

81
variants/xiao_nrf52/platformio.ini Normal file
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[nrf52840_xiao]
extends = nrf52_base
platform_packages =
toolchain-gccarmnoneeabi@~1.100301.0
framework-arduinoadafruitnrf52
board = seeed-xiao-afruitnrf52-nrf52840
board_build.ldscript = boards/nrf52840_s140_v7.ld
build_flags = ${nrf52_base.build_flags}
-D NRF52_PLATFORM -D XIAO_NRF52
-I lib/nrf52/s140_nrf52_7.3.0_API/include
-I lib/nrf52/s140_nrf52_7.3.0_API/include/nrf52
lib_ignore =
BluetoothOTA
lvgl
lib5b4
lib_deps =
${nrf52_base.lib_deps}
rweather/Crypto @ ^0.4.0
[Xiao_nrf52]
extends = nrf52840_xiao
;board_build.ldscript = boards/nrf52840_s140_v7.ld
build_flags = ${nrf52840_xiao.build_flags}
-D P_LORA_TX_LED=11
-I variants/xiao_nrf52
-I src/helpers/nrf52
-D RADIO_CLASS=CustomSX1262
-D WRAPPER_CLASS=CustomSX1262Wrapper
-D LORA_TX_POWER=22
-D SX126X_CURRENT_LIMIT=130
-D SX126X_RX_BOOSTED_GAIN=1
build_src_filter = ${nrf52840_xiao.build_src_filter}
+<helpers/*.cpp>
+<helpers/nrf52/XiaoNrf52Board.cpp>
+<../variants/xiao_nrf52>
debug_tool = jlink
upload_protocol = nrfutil
[env:Xiao_nrf52_companion_radio_ble]
extends = Xiao_nrf52
build_flags =
${Xiao_nrf52.build_flags}
-D MAX_CONTACTS=100
-D MAX_GROUP_CHANNELS=8
-D BLE_PIN_CODE=123456
; -D BLE_DEBUG_LOGGING=1
; -D ENABLE_PRIVATE_KEY_IMPORT=1
; -D ENABLE_PRIVATE_KEY_EXPORT=1
-D MESH_PACKET_LOGGING=1
-D MESH_DEBUG=1
build_src_filter = ${Xiao_nrf52.build_src_filter}
+<helpers/nrf52/SerialBLEInterface.cpp>
+<../examples/companion_radio/main.cpp>
lib_deps =
${Xiao_nrf52.lib_deps}
densaugeo/base64 @ ~1.4.0
[env:Xiao_nrf52_alt_pinout_companion_radio_ble]
extends = env:Xiao_nrf52_companion_radio_ble
build_flags =
${env:Xiao_nrf52_companion_radio_ble.build_flags}
-D SX1262_XIAO_S3_VARIANT
[env:Xiao_nrf52_repeater]
extends = Xiao_nrf52
build_flags =
${Xiao_nrf52.build_flags}
-D ADVERT_NAME='"Xiao_nrf52 Repeater"'
-D ADVERT_LAT=0.0
-D ADVERT_LON=0.0
-D ADMIN_PASSWORD='"password"'
; -D MESH_PACKET_LOGGING=1
; -D MESH_DEBUG=1
build_src_filter = ${Xiao_nrf52.build_src_filter}
+<../examples/simple_repeater/main.cpp>
[env:Xiao_nrf52_alt_pinout_repeater]
extends = env:Xiao_nrf52_repeater
build_flags =
${env:Xiao_nrf52_repeater.build_flags}
-D SX1262_XIAO_S3_VARIANT

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variants/xiao_nrf52/target.cpp Normal file
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#include <Arduino.h>
#include "target.h"
#include <helpers/ArduinoHelpers.h>
XiaoNrf52Board board;
RADIO_CLASS radio = new Module(P_LORA_NSS, P_LORA_DIO_1, P_LORA_RESET, P_LORA_BUSY, SPI);
WRAPPER_CLASS radio_driver(radio, board);
VolatileRTCClock rtc_clock;
#ifndef LORA_CR
#define LORA_CR 5
#endif
bool radio_init() {
// rtc_clock.begin(Wire);
#ifdef SX126X_DIO3_TCXO_VOLTAGE
float tcxo = SX126X_DIO3_TCXO_VOLTAGE;
#else
float tcxo = 1.6f;
#endif
SPI.setPins(P_LORA_MISO, P_LORA_SCLK, P_LORA_MOSI);
SPI.begin();
int status = radio.begin(LORA_FREQ, LORA_BW, LORA_SF, LORA_CR, RADIOLIB_SX126X_SYNC_WORD_PRIVATE, LORA_TX_POWER, 8, tcxo);
if (status != RADIOLIB_ERR_NONE) {
Serial.print("ERROR: radio init failed: ");
Serial.println(status);
return false; // fail
}
radio.setCRC(1);
#ifdef SX126X_CURRENT_LIMIT
radio.setCurrentLimit(SX126X_CURRENT_LIMIT);
#endif
#ifdef SX126X_DIO2_AS_RF_SWITCH
radio.setDio2AsRfSwitch(SX126X_DIO2_AS_RF_SWITCH);
#endif
#ifdef SX126X_RX_BOOSTED_GAIN
radio.setRxBoostedGainMode(SX126X_RX_BOOSTED_GAIN);
#endif
return true; // success
}
uint32_t radio_get_rng_seed() {
return radio.random(0x7FFFFFFF);
}
void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
radio.setFrequency(freq);
radio.setSpreadingFactor(sf);
radio.setBandwidth(bw);
radio.setCodingRate(cr);
}
void radio_set_tx_power(uint8_t dbm) {
radio.setOutputPower(dbm);
}
mesh::LocalIdentity radio_new_identity() {
RadioNoiseListener rng(radio);
return mesh::LocalIdentity(&rng); // create new random identity
}

18
variants/xiao_nrf52/target.h Normal file
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#pragma once
#define RADIOLIB_STATIC_ONLY 1
#include <RadioLib.h>
#include <helpers/RadioLibWrappers.h>
#include <helpers/nrf52/XiaoNrf52Board.h>
#include <helpers/CustomSX1262Wrapper.h>
#include <helpers/ArduinoHelpers.h>
extern XiaoNrf52Board board;
extern WRAPPER_CLASS radio_driver;
extern VolatileRTCClock rtc_clock;
bool radio_init();
uint32_t radio_get_rng_seed();
void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
void radio_set_tx_power(uint8_t dbm);
mesh::LocalIdentity radio_new_identity();

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variants/xiao_nrf52/variant.cpp Normal file
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#include "variant.h"
#include "wiring_constants.h"
#include "wiring_digital.h"
#include "nrf.h"
const uint32_t g_ADigitalPinMap[] =
{
// D0 .. D10
2, // D0 is P0.02 (A0)
3, // D1 is P0.03 (A1)
28, // D2 is P0.28 (A2)
29, // D3 is P0.29 (A3)
4, // D4 is P0.04 (A4,SDA)
5, // D5 is P0.05 (A5,SCL)
43, // D6 is P1.11 (TX)
44, // D7 is P1.12 (RX)
45, // D8 is P1.13 (SCK)
46, // D9 is P1.14 (MISO)
47, // D10 is P1.15 (MOSI)
// LEDs
26, // D11 is P0.26 (LED RED)
6, // D12 is P0.06 (LED BLUE)
30, // D13 is P0.30 (LED GREEN)
14, // D14 is P0.14 (READ_BAT)
// LSM6DS3TR
40, // D15 is P1.08 (6D_PWR)
27, // D16 is P0.27 (6D_I2C_SCL)
7, // D17 is P0.07 (6D_I2C_SDA)
11, // D18 is P0.11 (6D_INT1)
// MIC
42, // D19 is P1.10 (MIC_PWR)
32, // D20 is P1.00 (PDM_CLK)
16, // D21 is P0.16 (PDM_DATA)
// BQ25100
13, // D22 is P0.13 (HICHG)
17, // D23 is P0.17 (~CHG)
//
21, // D24 is P0.21 (QSPI_SCK)
25, // D25 is P0.25 (QSPI_CSN)
20, // D26 is P0.20 (QSPI_SIO_0 DI)
24, // D27 is P0.24 (QSPI_SIO_1 DO)
22, // D28 is P0.22 (QSPI_SIO_2 WP)
23, // D29 is P0.23 (QSPI_SIO_3 HOLD)
// NFC
9, // D30 is P0.09 (NFC1)
10, // D31 is P0.10 (NFC2)
// VBAT
31, // D32 is P0.31 (VBAT)
};
void initVariant()
{
// Disable reading of the BAT voltage.
// https://wiki.seeedstudio.com/XIAO_BLE#q3-what-are-the-considerations-when-using-xiao-nrf52840-sense-for-battery-charging
pinMode(VBAT_ENABLE, OUTPUT);
digitalWrite(VBAT_ENABLE, HIGH);
// Low charging current.
// https://wiki.seeedstudio.com/XIAO_BLE#battery-charging-current
pinMode(PIN_CHARGING_CURRENT, INPUT);
pinMode(PIN_QSPI_CS, OUTPUT);
digitalWrite(PIN_QSPI_CS, HIGH);
pinMode(LED_RED, OUTPUT);
digitalWrite(LED_RED, HIGH);
pinMode(LED_GREEN, OUTPUT);
digitalWrite(LED_GREEN, HIGH);
pinMode(LED_BLUE, OUTPUT);
digitalWrite(LED_BLUE, HIGH);
}

149
variants/xiao_nrf52/variant.h Normal file
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#ifndef _SEEED_XIAO_NRF52840_H_
#define _SEEED_XIAO_NRF52840_H_
/** Master clock frequency */
#define VARIANT_MCK (64000000ul)
#define USE_LFXO // Board uses 32khz crystal for LF
//#define USE_LFRC // Board uses RC for LF
/*----------------------------------------------------------------------------
* Headers
*----------------------------------------------------------------------------*/
#include "WVariant.h"
#ifdef __cplusplus
extern "C"
{
#endif // __cplusplus
#define PINS_COUNT (33)
#define NUM_DIGITAL_PINS (33)
#define NUM_ANALOG_INPUTS (8)
#define NUM_ANALOG_OUTPUTS (0)
// LEDs
#define PIN_LED (LED_RED)
#define LED_PWR (PINS_COUNT)
#define PIN_NEOPIXEL (PINS_COUNT)
#define NEOPIXEL_NUM (0)
#define LED_BUILTIN (PIN_LED)
#define LED_RED (11)
#define LED_GREEN (13)
#define LED_BLUE (12)
#define LED_STATE_ON (1) // State when LED is litted
// Buttons
#define PIN_BUTTON1 (PINS_COUNT)
// Digital PINs
static const uint8_t D0 = 0 ;
static const uint8_t D1 = 1 ;
static const uint8_t D2 = 2 ;
static const uint8_t D3 = 3 ;
static const uint8_t D4 = 4 ;
static const uint8_t D5 = 5 ;
static const uint8_t D6 = 6 ;
static const uint8_t D7 = 7 ;
static const uint8_t D8 = 8 ;
static const uint8_t D9 = 9 ;
static const uint8_t D10 = 10;
#define VBAT_ENABLE (14) // Output LOW to enable reading of the BAT voltage.
// https://wiki.seeedstudio.com/XIAO_BLE#q3-what-are-the-considerations-when-using-xiao-nrf52840-sense-for-battery-charging
#define PIN_CHARGING_CURRENT (22) // Battery Charging current
// https://wiki.seeedstudio.com/XIAO_BLE#battery-charging-current
// Analog pins
#define PIN_A0 (0)
#define PIN_A1 (1)
#define PIN_A2 (2)
#define PIN_A3 (3)
#define PIN_A4 (4)
#define PIN_A5 (5)
#define PIN_VBAT (32) // Read the BAT voltage.
// https://wiki.seeedstudio.com/XIAO_BLE#q3-what-are-the-considerations-when-using-xiao-nrf52840-sense-for-battery-charging
#define BAT_NOT_CHARGING (23) // LOW when charging
#define AREF_VOLTAGE (3.0)
#define ADC_MULTIPLIER (3.0F) // 1M, 512k divider bridge
static const uint8_t A0 = PIN_A0;
static const uint8_t A1 = PIN_A1;
static const uint8_t A2 = PIN_A2;
static const uint8_t A3 = PIN_A3;
static const uint8_t A4 = PIN_A4;
static const uint8_t A5 = PIN_A5;
#define ADC_RESOLUTION (12)
// Other pins
#define PIN_NFC1 (30)
#define PIN_NFC2 (31)
// Serial interfaces
#define PIN_SERIAL1_RX (7)
#define PIN_SERIAL1_TX (6)
// SPI Interfaces
#define SPI_INTERFACES_COUNT (2)
#define PIN_SPI_MISO (9)
#define PIN_SPI_MOSI (10)
#define PIN_SPI_SCK (8)
static const uint8_t SS = D3; // NSS for sx ?
static const uint8_t MOSI = PIN_SPI_MOSI;
static const uint8_t MISO = PIN_SPI_MISO;
static const uint8_t SCK = PIN_SPI_SCK ;
#define PIN_SPI1_MISO (25)
#define PIN_SPI1_MOSI (26)
#define PIN_SPI1_SCK (29)
// Wire Interfaces
#define WIRE_INTERFACES_COUNT (1)
#define PIN_WIRE_SDA (17) // 4 and 5 are used for the sx1262 !
#define PIN_WIRE_SCL (16) // use WIRE1_SDA
static const uint8_t SDA = PIN_WIRE_SDA;
static const uint8_t SCL = PIN_WIRE_SCL;
//#define PIN_WIRE1_SDA (17)
//#define PIN_WIRE1_SCL (16)
#define PIN_LSM6DS3TR_C_POWER (15)
#define PIN_LSM6DS3TR_C_INT1 (18)
// PDM Interfaces
#define PIN_PDM_PWR (19)
#define PIN_PDM_CLK (20)
#define PIN_PDM_DIN (21)
// QSPI Pins
#define PIN_QSPI_SCK (24)
#define PIN_QSPI_CS (25)
#define PIN_QSPI_IO0 (26)
#define PIN_QSPI_IO1 (27)
#define PIN_QSPI_IO2 (28)
#define PIN_QSPI_IO3 (29)
// On-board QSPI Flash
#define EXTERNAL_FLASH_DEVICES (P25Q16H)
#define EXTERNAL_FLASH_USE_QSPI
#ifdef __cplusplus
}
#endif
/*----------------------------------------------------------------------------
* Arduino objects - C++ only
*----------------------------------------------------------------------------*/
#endif