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Add XIAO Wio-SX1262 overlay; support SX12xx bandwidths (including 62.5 kHz) as default

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- boards/seeed/xiao_wio_sx1262: add overlay, .conf, board.yml
- app: support full set of SX12xx bandwidths; default BW set to 62 (62.5 kHz)
- Update Kconfig and prj.conf
- Update lora_modem.h/c for validation and mapping
This commit is contained in:
maze
2026-03-26 13:01:47 +01:00
parent d074cd2e43
commit 45d1364a71
926 changed files with 174514 additions and 26 deletions
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11
app/CMakeLists.txt
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@@ -6,11 +6,12 @@ cmake_minimum_required(VERSION 3.20.0)
list(APPEND BOARD_ROOT ${CMAKE_CURRENT_LIST_DIR}/..)
list(APPEND DTS_ROOT ${CMAKE_CURRENT_LIST_DIR}/..)
# Register the LR11xx out-of-tree driver as an extra Zephyr module.
# It is only compiled when a semtech,lr11xx DTS node is enabled.
list(APPEND ZEPHYR_EXTRA_MODULES
${CMAKE_CURRENT_LIST_DIR}/../drivers/lora/lr11xx
)
# LR11xx out-of-tree driver is currently not added as a Zephyr module
# to avoid Kconfig dependency issues during board prototyping.
# If needed, re-enable by appending the driver path to ZEPHYR_EXTRA_MODULES.
# list(APPEND ZEPHYR_EXTRA_MODULES
# ${CMAKE_CURRENT_LIST_DIR}/../drivers/lora/lr11xx
# )
find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})

4
app/Kconfig
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@@ -41,9 +41,9 @@ config LORAMODEM_LORA_SF
config LORAMODEM_LORA_BW
int "Bandwidth (kHz)"
default 125
default 62
help
LoRa bandwidth in kHz. Valid values: 125, 250, 500.
LoRa bandwidth in kHz. Supported values include: 7, 10, 15, 20, 31, 41, 62 (62.5 kHz), 125, 200, 250, 400, 500, 800, 1000, 1600.
config LORAMODEM_LORA_CR
int "Coding rate denominator"

8
app/prj.conf
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@@ -19,10 +19,10 @@ CONFIG_HEAP_MEM_POOL_SIZE=4096
CONFIG_MAIN_STACK_SIZE=2048
# Default radio parameters (US 915 MHz, SF9, BW125, CR 4/5)
CONFIG_LORAMODEM_LORA_FREQ_HZ=915000000
CONFIG_LORAMODEM_LORA_SF=9
CONFIG_LORAMODEM_LORA_BW=125
CONFIG_LORAMODEM_LORA_FREQ_HZ=869618000
CONFIG_LORAMODEM_LORA_SF=8
CONFIG_LORAMODEM_LORA_BW=62
CONFIG_LORAMODEM_LORA_CR=5
CONFIG_LORAMODEM_LORA_TX_POWER_DBM=14
CONFIG_LORAMODEM_LORA_TX_POWER_DBM=21
CONFIG_LORAMODEM_LORA_PREAMBLE_LEN=8
CONFIG_LORAMODEM_MAX_PACKET_SIZE=255

27
app/src/lora_modem.c
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@@ -31,10 +31,22 @@ static K_MUTEX_DEFINE(g_params_mutex);
static enum lora_signal_bandwidth bw_to_enum(uint16_t bw_khz)
{
switch (bw_khz) {
case 500: return BW_500_KHZ;
case 7: return BW_7_KHZ;
case 10: return BW_10_KHZ;
case 15: return BW_15_KHZ;
case 20: return BW_20_KHZ;
case 31: return BW_31_KHZ;
case 41: return BW_41_KHZ;
case 62: return BW_62_KHZ; /* 62.5 kHz */
case 125: return BW_125_KHZ;
case 200: return BW_200_KHZ; /* ~203 kHz */
case 250: return BW_250_KHZ;
case 125: /* fall through */
default: return BW_125_KHZ;
case 400: return BW_400_KHZ;
case 500: return BW_500_KHZ;
case 800: return BW_800_KHZ;
case 1000: return BW_1000_KHZ;
case 1600: return BW_1600_KHZ;
default: return BW_125_KHZ;
}
}
@@ -117,8 +129,13 @@ int lora_modem_set_params(const struct lora_radio_params *params)
if (params->sf < 6 || params->sf > 12) {
return -EINVAL;
}
if (params->bw_khz != 125 && params->bw_khz != 250 &&
params->bw_khz != 500) {
/* Accept all Zephyr lora driver supported bandwidths (units: kHz). */
switch (params->bw_khz) {
case 7: case 10: case 15: case 20: case 31: case 41:
case 62: case 125: case 200: case 250: case 400:
case 500: case 800: case 1000: case 1600:
break;
default:
return -EINVAL;
}
if (params->cr < 5 || params->cr > 8) {

2
app/src/lora_modem.h
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@@ -21,7 +21,7 @@
struct lora_radio_params {
uint32_t freq_hz; /**< Center frequency in Hz */
uint8_t sf; /**< Spreading factor (7-12) */
uint16_t bw_khz; /**< Bandwidth in kHz (125, 250, or 500) */
uint16_t bw_khz; /**< Bandwidth in kHz (e.g., 62 means 62.5 kHz). Supported values: 7, 10, 15, 20, 31, 41, 62, 125, 200, 250, 400, 500, 800, 1000, 1600 */
uint8_t cr; /**< Coding rate denominator (5..8, meaning 4/5..4/8) */
int8_t tx_power; /**< TX power in dBm */
uint8_t preamble_len; /**< Preamble length in symbols */