From 908634474b246a58d99135f233f0845badf68db1 Mon Sep 17 00:00:00 2001
From: AlessandroAU <alessandroaus@gmail.com>
Date: Tue, 16 Jun 2020 07:03:03 +1000
Subject: [PATCH] Adds SX1276_DetectChip() function (#373)

* Adds SX1276_DetectChip() function

works by testing for 0x12 match in version reg 0x42

* fix build err
---
 Multiprotocol/SX1276_SPI.ino | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/Multiprotocol/SX1276_SPI.ino b/Multiprotocol/SX1276_SPI.ino
index c576d40..5085673 100644
--- a/Multiprotocol/SX1276_SPI.ino
+++ b/Multiprotocol/SX1276_SPI.ino
@@ -42,6 +42,39 @@ uint8_t SX1276_Reset()
     return 0;
 }
 
+bool SX1276_DetectChip() //to be called after reset, verfies the chip has been detected
+{
+  #define MaxAttempts 5
+  uint8_t i = 0;
+  bool chipFound = false;
+  while ((i < MaxAttempts) && !chipFound)
+  {
+    uint8_t ChipVersion = SX1276_ReadReg(0x42);
+    if (ChipVersion == 0x12)
+    {
+      debugln("SX1276 reg version=%d", ChipVersion);
+      chipFound = true;
+    }
+    else
+    {
+      debug("SX1276 not found! attempts: %d", i);
+      debug(" of ");
+      debugln("%d SX1276 reg version=%d", MaxAttempts, ChipVersion);
+      i++;
+    }
+  }
+  if (!chipFound)
+  {
+    debugln("SX1276 not detected!!!");
+    return false;
+  }
+  else
+  {
+    debugln("Found SX1276 Device!");
+    return true;
+  }
+}
+
 void SX1276_SetTxRxMode(uint8_t mode)
 {
 	#ifdef SX1276_TXEN_pin