From d7ac8f65c7d0db5bad2057cebe9124e4e980e1ba Mon Sep 17 00:00:00 2001
From: Stephan Martin <designer2k2@gmail.com>
Date: Sat, 5 Jun 2021 09:59:16 +0200
Subject: [PATCH] Add functions to expose the RX/TX error counters

This exposes the REC and TEC registers. They hold the error counters and can give insides before the checkError triggers.
---
 mcp2515.cpp | 10 ++++++++++
 mcp2515.h   |  2 ++
 2 files changed, 12 insertions(+)

diff --git a/mcp2515.cpp b/mcp2515.cpp
index 989b752..6b86fb9 100644
--- a/mcp2515.cpp
+++ b/mcp2515.cpp
@@ -754,3 +754,13 @@ void MCP2515::clearERRIF()
     //clearInterrupts();
     modifyRegister(MCP_CANINTF, CANINTF_ERRIF, 0);
 }
+
+uint8_t MCP2515::errorCountRX(void)                             
+{
+    return readRegister(MCP_REC);
+}
+
+uint8_t MCP2515::errorCountTX(void)                             
+{
+    return readRegister(MCP_TEC);
+}
diff --git a/mcp2515.h b/mcp2515.h
index 2a4f8ef..5d9bef7 100644
--- a/mcp2515.h
+++ b/mcp2515.h
@@ -488,6 +488,8 @@ class MCP2515
         void clearRXnOVR(void);
         void clearMERR();
         void clearERRIF();
+        uint8_t errorCountRX(void);
+        uint8_t errorCountTX(void);
 };
 
 #endif