Obsidian-Knowledge-Base/X-Knowledge-Base/wiki/Note 17 LoRa.md

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tags: [entity] type: entity topic: stm32-lower note: 17 created: 2026-07-16

updated: 2026-07-16

Note 17: LoRa (lower/stm32/13~14)

Projects

#	Directory	Description
13	13_lora_node_hal	LoRa Node (LLCC68)
14	14_lora_gateway_hal	LoRa Gateway

Code Accuracy Audit

Path Audit

Claimed Path	Actual Path	Status
stm32/13_lora_node_hal/Core/Src/main.c	13_lora_node_hal/Core/Src/main.c	✅ Correct
stm32/13_lora_node_hal/Interface/LoRa/lora.c	13_lora_node_hal/Interface/LoRa/lora.c	✅ Correct
stm32/13_lora_node_hal/Interface/LoRa/lora.h	13_lora_node_hal/Interface/LoRa/lora.h	✅ Correct
stm32/14_lora_gateway_hal/Core/Src/main.c	14_lora_gateway_hal/Core/Src/main.c	✅ Correct

LoRa Init (lora.c)

Note claims LoRa_Init uses DRIVER_LLCC68_LINK_INIT macros and llcc68_init → All match actual code (394-line file).

Claimed Parameter	Actual Value	Match?
LLCC68_LORA_DEFAULT_SF = SF9	lora.h define	✅ Match
LLCC68_LORA_DEFAULT_BANDWIDTH = 125 KHz	lora.h define	✅ Match
LLCC68_LORA_DEFAULT_CR = CR 4/5	lora.h define	✅ Match
LLCC68_LORA_DEFAULT_TX_DBM = 17 dBm	lora.h define	✅ Match
LLCC68_LORA_DEFAULT_RF_FREQUENCY = 480000000	lora.h define	✅ Match
LLCC68_LORA_DEFAULT_SYNC_WORD = 0x3444	lora.h define	✅ Match
LLCC68_LORA_DEFAULT_PREAMBLE_LENGTH = 12	lora.h define	✅ Match

LoRa Send/Receive

Claimed by Note	Actual Code	Match?
TXEN_HIGH; RXEN_LOW; before send	Present in lora.c	✅ Match
TXEN_LOW; RXEN_HIGH; for RX mode	Present in lora.c	✅ Match
llcc68_lora_transmit(...) for send	Present	✅ Match
llcc68_continuous_receive(...) for RX	Present	✅ Match
llcc68_irq_handler(&gs_handle) then memcpy	Present	✅ Match
GPIO EXTI callback for key press	In main.c	✅ Match

Node main.c logic

Note claims:

• Key press triggers send ("一个普通LoRa节点")
• RX mode by default
• Gateway echoes back on receive

All match actual code.

Summary

Overall Accuracy: Very High

Issues Found: None significant. All parameters, functions, and driver call sequence match the actual code.