From 7177242d8084b8722b27e24737e99d40fbfa0580 Mon Sep 17 00:00:00 2001
From: Robert Klajko <klajkor@gmail.com>
Date: Sun, 18 Jul 2021 21:43:30 +0200
Subject: [PATCH] Missing lora_initialized() function implemnted. [RK,
 2021.07.18]

---
 components/lora/lora.c | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/components/lora/lora.c b/components/lora/lora.c
index 952b0ea..988d002 100644
--- a/components/lora/lora.c
+++ b/components/lora/lora.c
@@ -499,3 +499,38 @@ lora_dump_registers(void)
    printf("\n");
 }
 
+/**
+ * @brief   Check if SX127x LoRa radio module initialized properly
+ * @return
+ *  - 0: Init failed
+ *  - 1: Init was succesful
+ * @note    RK, 2021.07.18
+ */
+int lora_initialized(void)
+{
+    /*
+    * Check version, see datasheet
+    * https://cdn-shop.adafruit.com/product-files/3179/sx1276_77_78_79.pdf, page 92, 105
+    */
+    uint8_t version;
+    uint8_t i = 0;
+    while (i < TIMEOUT_RESET)
+    {
+        version = lora_read_reg(REG_VERSION);
+        if (version == 0x12)
+            break;
+        vTaskDelay(2);
+        i++;
+    }
+    if (i >= TIMEOUT_RESET)
+    {
+        return 0;
+    }
+
+    /*
+    * Switch to idle mode.
+    */
+    lora_idle();
+
+    return 1;
+}