From ac55fc28ee6aa68cddcac00f6b76398cd8c0b541 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A1szl=C3=B3=20Monda?= <laci@monda.hu>
Date: Thu, 21 Sep 2017 21:34:23 +0200
Subject: [PATCH] Add I2C_Watchdog variable that gets incremented upon I2C
 slave operations.

---
 devices/MKL03Z4/drivers/fsl_i2c.c | 4 ++++
 devices/MKL03Z4/drivers/fsl_i2c.h | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/devices/MKL03Z4/drivers/fsl_i2c.c b/devices/MKL03Z4/drivers/fsl_i2c.c
index 6fc75f4..c7c76f8 100644
--- a/devices/MKL03Z4/drivers/fsl_i2c.c
+++ b/devices/MKL03Z4/drivers/fsl_i2c.c
@@ -146,6 +146,9 @@ static i2c_isr_t s_i2cMasterIsr;
 /*! @brief Pointer to slave IRQ handler for each instance. */
 static i2c_isr_t s_i2cSlaveIsr;
 
+/* @brief Extern counter to ensure that I2C is always alive */
+volatile uint32_t I2C_Watchdog;
+
 /*******************************************************************************
  * Codes
  ******************************************************************************/
@@ -1386,6 +1389,7 @@ void I2C_SlaveTransferHandleIRQ(I2C_Type *base, void *i2cHandle)
 
     /* Add this to avoid build warning. */
     dummy++;
+    I2C_Watchdog++;
 
     status = I2C_SlaveGetStatusFlags(base);
     xfer = &(handle->transfer);
diff --git a/devices/MKL03Z4/drivers/fsl_i2c.h b/devices/MKL03Z4/drivers/fsl_i2c.h
index 7117fd5..21f330b 100644
--- a/devices/MKL03Z4/drivers/fsl_i2c.h
+++ b/devices/MKL03Z4/drivers/fsl_i2c.h
@@ -32,6 +32,8 @@
 
 #include "fsl_common.h"
 
+extern volatile uint32_t I2C_Watchdog;
+
 /*!
  * @addtogroup i2c_driver
  * @{