diff --git a/CMakeLists.txt b/CMakeLists.txt
index 945ade9..91dbe05 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -117,6 +117,7 @@ set(CMAKE_VERBOSE_MAKEFILE OFF) # Set it to ON to have verbose build output
 # Construct executable
 add_executable(${EXECUTABLE}
   ${SRC_DIR}/Mcal/mtimer.c
+  ${SRC_DIR}/Mcal/Clock.c
   ${SRC_DIR}/Mcal/Mcu.c
   ${SRC_DIR}/Startup/boot.s
   ${SRC_DIR}/Startup/intvect.c
diff --git a/Code/Mcal/Clock.c b/Code/Mcal/Clock.c
new file mode 100644
index 0000000..dd6a0b0
--- /dev/null
+++ b/Code/Mcal/Clock.c
@@ -0,0 +1,73 @@
+/******************************************************************************************
+  Filename    : Clock.c
+  
+  Core        : RV32IMAC
+  
+  MCU         : FE310-G002 (SiFive)
+    
+  Author      : Chalandi Amine
+ 
+  Owner       : Chalandi Amine
+  
+  Date        : 11.12.2022
+  
+  Description : Clock driver implementation
+  
+******************************************************************************************/
+
+//=====================================================================================================
+// Includes
+//=====================================================================================================
+#include "FE310.h"
+#include "Clock.h"
+#include "riscv-csr.h"
+
+//=====================================================================================================
+// Functions prototype
+//=====================================================================================================
+
+//=====================================================================================================
+// Macros
+//=====================================================================================================
+
+//=====================================================================================================
+// Globals
+//=====================================================================================================
+
+
+//-----------------------------------------------------------------------------------------
+/// \brief  
+///
+/// \param  
+///
+/// \return 
+//-----------------------------------------------------------------------------------------
+void FE310_ClockInitialization(void)
+{
+  /* wait for HFXOSC to be become ready */
+  while(!PRCI->hfxosccfg.bit.ready);
+
+  /* select pllref clock (HFXOSC) */
+  PRCI->pllcfg.bit.refsel = 1;
+
+  /* divide pllref (HFXOSC) by 2 ==> refr = 8 MHz */
+  PRCI->pllcfg.bit.pllr = 1;
+
+  /* multiply refr by 96 ==> vco = 768 MHz */
+  PRCI->pllcfg.bit.pllf = 47;
+
+  /* divide vco by 4 ==> pllout = 192 MHz */
+  PRCI->pllcfg.bit.pllq = 2;
+
+  /* bypass final pllout divider */
+  PRCI->plloutdiv.bit.divby1 = 1;
+
+  /* drive the final hfclk with the PLL output */
+  PRCI->pllcfg.bit.sel = 1;
+
+  /* disable pll bypass */
+  PRCI->pllcfg.bit.bypass = 0;
+
+  /* wait for pll to lock */
+  while(!PRCI->pllcfg.bit.lock);
+}
diff --git a/Code/Mcal/Clock.h b/Code/Mcal/Clock.h
new file mode 100644
index 0000000..b79e5f8
--- /dev/null
+++ b/Code/Mcal/Clock.h
@@ -0,0 +1,29 @@
+/******************************************************************************************
+  Filename    : Clock.h
+  
+  Core        : RV32IMAC
+  
+  MCU         : FE310-G002 (SiFive)
+    
+  Author      : Chalandi Amine
+ 
+  Owner       : Chalandi Amine
+  
+  Date        : 11.12.2022
+  
+  Description : Clock driver header file
+  
+******************************************************************************************/
+
+#ifndef __CLOCK_H__
+#define __CLOCK_H__
+
+//=====================================================================================================
+// Functions prototype
+//=====================================================================================================
+void FE310_ClockInitialization(void);
+
+
+#endif /* __MCU_H__ */
+
+
diff --git a/Code/Mcal/Mcu.c b/Code/Mcal/Mcu.c
index 4aa71fa..ebfc379 100644
--- a/Code/Mcal/Mcu.c
+++ b/Code/Mcal/Mcu.c
@@ -19,6 +19,7 @@
 // Includes
 //=====================================================================================================
 #include "FE310.h"
+#include "Clock.h"
 #include "Mcu.h"
 #include "riscv-csr.h"
 
@@ -44,6 +45,9 @@
 //-----------------------------------------------------------------------------------------
 void FE310_HwInitialization(void)
 {
+  /* Configure the cpu and the peripheral clocks */
+  FE310_ClockInitialization();
+
   /* Set output high (and set value before switching to output). */
   GPIO0->output_val.bit.pin5 = 1;
   GPIO0->output_en.bit.pin5 = 1;
diff --git a/Makefile b/Makefile
index 4c1ac25..43e9237 100644
--- a/Makefile
+++ b/Makefile
@@ -183,6 +183,7 @@ endif
 ############################################################################################
 
 SRC_FILES := $(SRC_DIR)/Mcal/mtimer.c     \
+             $(SRC_DIR)/Mcal/Clock.c      \
              $(SRC_DIR)/Mcal/Mcu.c        \
              $(SRC_DIR)/Startup/boot.s    \
              $(SRC_DIR)/Startup/intvect.c \