From 862d8eeadd3b0a9016e26ba71ee1223825b4253e Mon Sep 17 00:00:00 2001
From: "Morgan 'ARR\\!' Allen" <morganrallen@gmail.com>
Date: Thu, 27 Feb 2020 08:18:53 -0800
Subject: [PATCH] add long missing set bandwidth function

---
 include/esp32-lora.h | 3 ++-
 main/esp32-lora.c    | 8 ++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/include/esp32-lora.h b/include/esp32-lora.h
index 22ebc8e..b219707 100644
--- a/include/esp32-lora.h
+++ b/include/esp32-lora.h
@@ -81,7 +81,7 @@ enum freq {
 } lora32_freq;
 
 enum bandwidth {
-  B78, B104, B156, B208, B3125, B417, B625, B125, B250
+  B78, B104, B156, B208, B3125, B417, B625, B125, B250, B500
 };
 
 const long long frequencies[3];
@@ -130,6 +130,7 @@ void lora32_dump_regs(lora32_cfg_t *lora);
 void lora32_enable_continuous_rx(lora32_cfg_t *lora);
 void lora32_enable_cad(lora32_cfg_t *lora);
 void lora32_send(lora32_cfg_t *config, uint8_t *data, uint8_t len);
+void lora32_set_bandwidth(lora32_cfg_t *lora, enum bandwidth bw);
 void lora32_set_coding_rate(lora32_cfg_t *lora, uint8_t cr);
 void lora32_set_spreadfactor(lora32_cfg_t *lora, uint8_t factor);
 void lora32_read_data(lora32_cfg_t *lora, uint8_t *data);
diff --git a/main/esp32-lora.c b/main/esp32-lora.c
index 91a7ea1..d1cd17f 100644
--- a/main/esp32-lora.c
+++ b/main/esp32-lora.c
@@ -262,6 +262,14 @@ void lora32_enable_cad(lora32_cfg_t *lora) {
   lora32_write_reg(lora, REG_OP_MODE, MODE_LONG_RANGE_MODE | MODE_CAD_DETECT);
 }
 
+void lora32_set_bandwidth(lora32_cfg_t *lora, enum bandwidth bw) {
+  uint8_t modem_config_1 = lora32_read_reg(lora, REG_MODEM_CONFIG_1);
+
+  ESP_LOGI(TAG, "lora32_set_bandwidth: %d", bw);
+
+  lora32_write_reg(lora, REG_MODEM_CONFIG_1, (modem_config_1 & 0x0F) | (bw << 4));
+}
+
 void lora32_set_coding_rate(lora32_cfg_t *lora, uint8_t cr) {
   if(cr < 5) cr = 5;
   else if(cr > 8) cr = 8;