michael/zephyr
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drivers: lora: Enable LDRO when symbol time > 16.38ms

Browse Source 
Enable LDRO when it should be enabled

Signed-off-by: Camille BAUD <mail@massdriver.space>
This commit is contained in:
Camille BAUD
2025-12-13 00:51:25 +01:00
committed by Fabio Baltieri
parent 6b2f1c19ac
commit cd65845ba2
1 changed files with 9 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/lora/lora-basics-modem/lbm_common.c
View File

@@ -16,6 +16,14 @@
LOG_MODULE_REGISTER(lbm_driver, CONFIG_LORA_LOG_LEVEL);
/* When Symbol Time exceeds 16.38 ms (6.1.1.4 SX1261/2 datasheet), enable LDRO
* Symbol Rate is bw / (2 ^ sf) so Symbol time is (2 ^ sf) / bw (6.1.1.1 SX1261/2 datasheet)
* Additionally, enable LDRO in additional situations described in Lora Basic Modem lr1mac
* where t < 16 from ral_compute_lora_ldro: Bandwidth less than 41 Khz, and SF9 with BW 41 KHz
*/
#define LORA_LDRO(sf, bw) ((((1 << sf) / bw) >= 16 ? 1 : 0) \
| (bw < BW_41_KHZ || (bw == BW_41_KHZ && sf == SF_9) ? 1 : 0))
/**
* @brief Attempt to acquire the modem for operations
*
@@ -73,7 +81,7 @@ int lbm_lora_config(const struct device *dev, struct lora_modem_config *lora_con
.mod_params = {
.sf = lora_config->datarate,
.cr = lora_config->coding_rate,
.ldro = 0,
.ldro = LORA_LDRO(lora_config->datarate, lora_config->bandwidth),
},
.pkt_params = {
.preamble_len_in_symb = lora_config->preamble_len,