diff --git a/Doxyfile b/Doxyfile
index 0d3eda2..abcb7cb 100755
--- a/Doxyfile
+++ b/Doxyfile
@@ -38,7 +38,7 @@ PROJECT_NAME           = "HARMcksL: ARM HAL toolbox (yet STM32 oriented)"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 0.5
+PROJECT_NUMBER         = 0.6
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
@@ -2047,15 +2047,15 @@ PREDEFINED             = DOXY=1 \
                          PACK__ \
                          WEAK__ \
                          INLINE__ \
-                         __INLINE \
-                         __STATIC_INLINE \
+                         __INLINE=inline \
+                         "__STATIC_INLINE=static inline" \
                          __WEAK \
-                         __IO \
-                         __O \
-                         __I \
-                         __IOM \
-                         __OM \
-                         __IM \
+                         __IO=volatile \
+                         __O=volatile \
+                         "__I=volatile const" \
+                         __IOM=volatile \
+                         __OM=volatile \
+                         "__IM=volatile const"
 
 # If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then this
 # tag can be used to specify a list of macro names that should be expanded. The
diff --git a/FctERR.c b/FctERR.c
index 5a4b1f8..327900a 100755
--- a/FctERR.c
+++ b/FctERR.c
@@ -1,6 +1,6 @@
 /*!\file FctERR.c
 ** \author SMFSW
-** \version v0.5
+** \version v0.6
 ** \date 2017
 ** \copyright MIT (c) 2017, SMFSW
 ** \brief errors to SMFSW FctERR code
diff --git a/FctERR.h b/FctERR.h
index 8878185..8ddf783 100755
--- a/FctERR.h
+++ b/FctERR.h
@@ -1,6 +1,6 @@
 /*!\file FctERR.h
 ** \author SMFSW
-** \version v0.5
+** \version v0.6
 ** \date 2017
 ** \copyright MIT (c) 2017, SMFSW
 ** \brief errors to SMFSW FctERR declarations
diff --git a/GPIO_ex.c b/GPIO_ex.c
index d6f2463..2824236 100755
--- a/GPIO_ex.c
+++ b/GPIO_ex.c
@@ -1,6 +1,6 @@
 /*!\file GPIO_ex.c
 ** \author SMFSW
-** \version v0.5
+** \version v0.6
 ** \date 2017
 ** \copyright MIT (c) 2017, SMFSW
 ** \brief Simple extension for GPIOs
diff --git a/GPIO_ex.h b/GPIO_ex.h
index d4ae3a5..3251840 100755
--- a/GPIO_ex.h
+++ b/GPIO_ex.h
@@ -1,6 +1,6 @@
 /*!\file GPIO_ex.h
 ** \author SMFSW
-** \version v0.5
+** \version v0.6
 ** \date 2017
 ** \copyright MIT (c) 2017, SMFSW
 ** \brief Simple extension for GPIOs
@@ -110,7 +110,7 @@ __INLINE void INLINE__ write_GPIO(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin, eActOu
 		#if defined(VERBOSE)
 			char port[10] = "";
 			str_GPIO_name(port, GPIOx, GPIO_Pin);
-			printf("Written %s to %u (%lums)\n", port, HAL_GPIO_ReadPin(GPIOx, GPIO_Pin), HAL_GetTick());
+			printf("Written %s to %u (%lums)\r\n", port, HAL_GPIO_ReadPin(GPIOx, GPIO_Pin), HAL_GetTick());
 		#endif
 	}
 }
@@ -129,7 +129,7 @@ __INLINE GPIO_PinState INLINE__ read_GPIO(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin
 		GPIO_PinState pin = HAL_GPIO_ReadPin(GPIOx, GPIO_Pin);
 		char port[10] = "";
 		str_GPIO_name(port, GPIOx, GPIO_Pin);
-		printf("Read %s is %u (%lums)\n", port, pin, HAL_GetTick());
+		printf("Read %s is %u (%lums)\r\n", port, pin, HAL_GetTick());
 		return pin;
 	#else
 		return HAL_GPIO_ReadPin(GPIOx, GPIO_Pin);
diff --git a/HARMcksL_v0_5.pdf b/HARMcksL_v0_6.pdf
similarity index 73%
rename from HARMcksL_v0_5.pdf
rename to HARMcksL_v0_6.pdf
index 2da53ce..11e6647 100755
Binary files a/HARMcksL_v0_5.pdf and b/HARMcksL_v0_6.pdf differ
diff --git a/PWM.c b/PWM.c
index 3610627..18bc304 100755
--- a/PWM.c
+++ b/PWM.c
@@ -1,6 +1,6 @@
 /*!\file PWM.c
 ** \author SMFSW
-** \version v0.5
+** \version v0.6
 ** \date 2017
 ** \copyright MIT (c) 2017, SMFSW
 ** \brief Simple PWM handling
diff --git a/PWM.h b/PWM.h
index f929bd3..f59cbdd 100755
--- a/PWM.h
+++ b/PWM.h
@@ -1,6 +1,6 @@
 /*!\file PWM.h
 ** \author SMFSW
-** \version v0.5
+** \version v0.6
 ** \date 2017
 ** \copyright MIT (c) 2017, SMFSW
 ** \brief Simple PWM handling
diff --git a/README.md b/README.md
index b7837d9..d3d15ab 100755
--- a/README.md
+++ b/README.md
@@ -17,5 +17,5 @@ Doxygen generated documentation can be found in "HARMcksL_vXXX.pdf"
 ## Release Notes
 Detailed changes will come after v1.0 release
 
-- v0.5: current
+- v0.6: current
   - Still in beta for some time
\ No newline at end of file
diff --git a/exceptions.c b/exceptions.c
index 3dc2122..10ca06a 100755
--- a/exceptions.c
+++ b/exceptions.c
@@ -1,6 +1,6 @@
 /*!\file exceptions.c
 ** \author SMFSW
-** \version v0.5
+** \version v0.6
 ** \date 2017
 ** \copyright MIT (c) 2017, SMFSW
 ** \brief Debug tool helpers functions
@@ -19,44 +19,44 @@ void stackDump(uint32_t stack[])
 {
 	enum { r0, r1, r2, r3, r12, lr, pc, psr};
 
-	printf("r0  = 0x%08lx\n", stack[r0]);
-	printf("r1  = 0x%08lx\n", stack[r1]);
-	printf("r2  = 0x%08lx\n", stack[r2]);
-	printf("r3  = 0x%08lx\n", stack[r3]);
-	printf("r12 = 0x%08lx\n", stack[r12]);
-	printf("lr  = 0x%08lx\n", stack[lr]);
-	printf("pc  = 0x%08lx\n", stack[pc]);
-	printf("psr = 0x%08lx\n", stack[psr]);
+	printf("r0  = 0x%08lx\r\n", stack[r0]);
+	printf("r1  = 0x%08lx\r\n", stack[r1]);
+	printf("r2  = 0x%08lx\r\n", stack[r2]);
+	printf("r3  = 0x%08lx\r\n", stack[r3]);
+	printf("r12 = 0x%08lx\r\n", stack[r12]);
+	printf("lr  = 0x%08lx\r\n", stack[lr]);
+	printf("pc  = 0x%08lx\r\n", stack[pc]);
+	printf("psr = 0x%08lx\r\n", stack[psr]);
 }
 
 
 void HardFault_Handler_callback(uint32_t stack[])
 {
 	printf("Hard Fault handler\t");
-	printf("SCB->HFSR = 0x%08lx\n", SCB->HFSR);
+	printf("SCB->HFSR = 0x%08lx\r\n", SCB->HFSR);
 
 	if ((SCB->HFSR & (1 << 30)) != 0)
 	{
 		uint32_t CFSRValue = SCB->CFSR;
 
 		printf("Hard Fault\t");
-		printf("SCB->CFSR = 0x%08lx\n", CFSRValue);
+		printf("SCB->CFSR = 0x%08lx\r\n", CFSRValue);
 		if ((SCB->CFSR & 0xFFFF0000) != 0)
 		{
 			printf("Usage fault: ");
 			CFSRValue >>= 16;	// right shift to lsb
-			if((CFSRValue & (1 << 9)) != 0) { printf("Zero div\n"); }
+			if((CFSRValue & (1 << 9)) != 0) { printf("Zero div\r\n"); }
 		}
 
 		if ((SCB->CFSR & 0xFF00) != 0)
 		{
 			CFSRValue = ((CFSRValue & 0x0000FF00) >> 8); // mask and shift
-			printf("Bus fault: 0x%02lx\n", CFSRValue);
+			printf("Bus fault: 0x%02lx\r\n", CFSRValue);
 		}
 
 		if ((SCB->CFSR & 0xFF) != 0) {
 			CFSRValue &= 0x000000FF; // mask other faults
-			printf("Memory Management fault: 0x%02lx\n", CFSRValue);
+			printf("Memory Management fault: 0x%02lx\r\n", CFSRValue);
 		}
 	}
 
@@ -70,7 +70,7 @@ void HardFault_Handler_callback(uint32_t stack[])
 void Error_Handler_callback(uint32_t stack[])
 {
 	// TODO: maybe pass by another asm code to retrieve HAL error code if not in stack
-	printf("Error handler\n");
+	printf("Error handler\r\n");
 	stackDump(stack);
 
 //	__BKPT(01);
diff --git a/stdream_rdir.c b/stdream_rdir.c
index 707335a..05fc822 100755
--- a/stdream_rdir.c
+++ b/stdream_rdir.c
@@ -1,6 +1,6 @@
 /*!\file stdream_rdir.c
 ** \author SMFSW
-** \version v0.5
+** \version v0.6
 ** \date 2017
 ** \copyright MIT (c) 2017, SMFSW
 ** \brief Stream redirection
@@ -27,9 +27,11 @@ static char buf_stream[128] = "";
 #warning "You have to define DBG_SERIAL in usart.h with an UART instance for this to work!"
 #endif
 
-__STATIC_INLINE void INLINE__ print_uart(char* ptr, int len)
+__STATIC_INLINE HAL_StatusTypeDef INLINE__ print_uart(char* ptr, int len)
 {
-	HAL_UART_Transmit(DBG_SERIAL, (uint8_t *) ptr, len, 30);
+	// TODO: find a way to determine if UART interrupts are enabled or not
+	return HAL_UART_Transmit(DBG_SERIAL, (uint8_t *) ptr, len, 30);
+	//return HAL_UART_Transmit_IT(DBG_SERIAL, (uint8_t *) ptr, len);
 }
 
 #endif
diff --git a/stdream_rdir.h b/stdream_rdir.h
index a5859c4..25f2482 100755
--- a/stdream_rdir.h
+++ b/stdream_rdir.h
@@ -1,6 +1,6 @@
 /*!\file stdream_rdir.h
 ** \author SMFSW
-** \version v0.5
+** \version v0.6
 ** \date 2017
 ** \copyright MIT (c) 2017, SMFSW
 ** \brief Stream redirection header