diff --git a/myapps/OLD/practice/00-uart-tx/Makefile b/myapps/OLD/practice/00-uart-tx/Makefile
deleted file mode 100644
index fb656c3..0000000
--- a/myapps/OLD/practice/00-uart-tx/Makefile
+++ /dev/null
@@ -1,145 +0,0 @@
-######################################
-# target
-######################################
-TARGET = stm32g0_blinky
-PART = STM32G030xx
-PYOCD_TARGET = stm32g030f6px
-
-
-######################################
-# building variables
-######################################
-# debug build?
-DEBUG = 1
-# optimization for size
-OPT = -Os
-
-
-#######################################
-# paths
-#######################################
-# Build path
-BUILD_DIR = build
-VND_DIR = ../../../vendor
-
-######################################
-# source
-######################################
-# C sources
-include hal.mk
-C_SOURCES += \
-$(VND_DIR)/STM32CubeG0/Drivers/CMSIS/Device/ST/STM32G0xx/Source/Templates/system_stm32g0xx.c \
-src/main.c
-
-
-# ASM sources
-ASM_SOURCES =  \
-$(VND_DIR)/STM32CubeG0/Drivers/CMSIS/Device/ST/STM32G0xx/Source/Templates/gcc/startup_stm32g030xx.s
-
-#######################################
-# binaries
-#######################################
-PREFIX = arm-none-eabi-
-
-CC = $(PREFIX)gcc
-CP = $(PREFIX)objcopy
-#SZ = $(PREFIX)size
-
-BIN = $(CP) -O binary -S
-
-#######################################
-# CFLAGS
-#######################################
-# cpu
-CPU = \
- -mcpu=cortex-m0plus \
- -mthumb
-
-DEFINES = -D$(PART)
-
-# fpu
-FPU = 
-
-# float-abi
-FLOAT-ABI =
-
-# mcu
-MCU = $(CPU) $(FPU) $(FLOAT-ABI)
-
-# C includes
-C_INCLUDES +=  \
- -Isrc/inc \
- -I$(VND_DIR)/STM32CubeG0/Drivers/CMSIS/Core/Include \
- -I$(VND_DIR)/STM32CubeG0/Drivers/CMSIS/Device/ST/STM32G0xx/Include
-
-# compile gcc flags
-ADDN_CFLAGS = \
- -Wall \
- -fno-common \
- -fdata-sections \
- -ffunction-sections
-
-CFLAGS = $(MCU) $(ADDN_CFLAGS) $(C_INCLUDES) $(OPT) $(DEFINES)
-
-ifeq ($(DEBUG), 1)
-CFLAGS += -ggdb3
-endif
-
-
-# Generate dependency information
-#CFLAGS += -MMD -MP -MF"$(@:%.o=%.d)"
-
-
-#######################################
-# LDFLAGS
-#######################################
-# link script
-LDSCRIPT = $(VND_DIR)/Ld/STM32G030F6MX_FLASH.ld
-
-LIBDIR = 
-LDFLAGS =  \
- $(MCU)  \
- -T $(LDSCRIPT) \
- --specs=nano.specs \
- -Wl,--gc-sections \
- -Wl,--print-memory-usage \
- -Wl,--no-warn-rwx-segments
-
-# default action: build all
-all: $(BUILD_DIR)/$(TARGET).elf $(BUILD_DIR)/$(TARGET).bin
-
-
-#######################################
-# build the application
-#######################################
-# list of objects
-OBJECTS = $(addprefix $(BUILD_DIR)/,$(notdir $(C_SOURCES:.c=.o)))
-vpath %.c $(sort $(dir $(C_SOURCES)))
-
-$(BUILD_DIR)/%.o: %.c Makefile | $(BUILD_DIR)
-	$(CC) -c $(CFLAGS) -Wa,-a,-ad,-alms=$(BUILD_DIR)/$(notdir $(<:.c=.lst)) $< -o $@
-
-#$(LUAOBJECTS) $(OBJECTS)
-$(BUILD_DIR)/$(TARGET).elf: $(OBJECTS) Makefile
-	$(CC) $(OBJECTS) $(LDFLAGS) $(ASM_SOURCES) -o $@
-
-$(BUILD_DIR)/%.bin: $(BUILD_DIR)/%.elf | $(BUILD_DIR)
-	$(BIN) $< $@	
-	
-$(BUILD_DIR):
-	mkdir $@		
-
-#######################################
-# Program
-#######################################
-
-flash: $(BUILD_DIR)/$(TARGET).bin
-	pyocd load --target $(PYOCD_TARGET) $(BUILD_DIR)/$(TARGET).bin
-
-#######################################
-# clean up
-#######################################
-clean:
-	-rm -fR $(BUILD_DIR)
-  
-# *** EOF ***
diff --git a/myapps/OLD/practice/00-uart-tx/hal.mk b/myapps/OLD/practice/00-uart-tx/hal.mk
deleted file mode 100644
index 62dacbf..0000000
--- a/myapps/OLD/practice/00-uart-tx/hal.mk
+++ /dev/null
@@ -1,20 +0,0 @@
-C_INCLUDES += \
- -I$(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Inc
-
-
-C_SOURCES += \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_cortex.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_pwr.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_pwr_ex.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_rcc.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_rcc_ex.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_exti.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_dma.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_dma_ex.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_flash.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_flash_ex.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_gpio.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_uart.c \
- src/stm32g0xx_hal_msp.c
-
diff --git a/myapps/OLD/practice/00-uart-tx/src/main.c b/myapps/OLD/practice/00-uart-tx/src/main.c
deleted file mode 100644
index fcc20c3..0000000
--- a/myapps/OLD/practice/00-uart-tx/src/main.c
+++ /dev/null
@@ -1,60 +0,0 @@
-// Tx/Rx: PA09[PA11]/PA10[PA12]
-
-//#include <string.h>
-//#include <stdio.h>
-#include "stm32g0xx_hal_msp.h"
-
-UART_HandleTypeDef huart1;
-
-char buffer[] = "Hello World\r\n";
-#define TXBUFFERSIZE  14    //strlen(buffer)
-#define TIMEOUT 0xFFFF
-/*
-int __io_putchar(int ch)
-{
-  HAL_UART_Transmit(&huart1, (uint8_t *)&ch, 1, TIMEOUT);
-  return ch;
-}
-*/
-/*
-setvbuf(stout, NULL, _IOLBF, 0);
-
-int _write (int file, const void * ptr, size_t len)
-{
-  HAL_UART_Transmit(&huart1, ptr, len, TIMEOUT);
-  return len;
-}
-*/
-static void uart_init(void)
-{
-
-  huart1.Instance = USART1;   // Defined in CMSIS header as peripheral address
-  huart1.Init.BaudRate = 115200;
-  huart1.Init.WordLength = UART_WORDLENGTH_8B;
-  huart1.Init.StopBits = UART_STOPBITS_1;
-  huart1.Init.Parity = UART_PARITY_NONE;
-  huart1.Init.Mode = UART_MODE_TX_RX;
-  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
-  huart1.Init.OverSampling = UART_OVERSAMPLING_16;
-  huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
-  huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
-  huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
-  while (HAL_UART_Init(&huart1) != HAL_OK);
-
-}
-
-
-int main(void)
-{
-  HAL_Init();
-  SystemClock_Config();
-  uart_init();
-  
-  while(1)
-  {
-    HAL_UART_Transmit(&huart1, (uint8_t *)buffer, TXBUFFERSIZE, TIMEOUT);
-    //printf("Hello World\r\n");
-    HAL_Delay(100);
-  }
-}
-
diff --git a/myapps/OLD/first-hal/Makefile b/myapps/first-hal/Makefile
similarity index 100%
rename from myapps/OLD/first-hal/Makefile
rename to myapps/first-hal/Makefile
diff --git a/myapps/OLD/first-hal/hal.mk b/myapps/first-hal/hal.mk
similarity index 100%
rename from myapps/OLD/first-hal/hal.mk
rename to myapps/first-hal/hal.mk
diff --git a/myapps/OLD/first-hal/src/inc/stm32g0xx_hal_conf.h b/myapps/first-hal/src/inc/stm32g0xx_hal_conf.h
similarity index 100%
rename from myapps/OLD/first-hal/src/inc/stm32g0xx_hal_conf.h
rename to myapps/first-hal/src/inc/stm32g0xx_hal_conf.h
diff --git a/myapps/OLD/first-hal/src/inc/stm32g0xx_hal_msp.h b/myapps/first-hal/src/inc/stm32g0xx_hal_msp.h
similarity index 100%
rename from myapps/OLD/first-hal/src/inc/stm32g0xx_hal_msp.h
rename to myapps/first-hal/src/inc/stm32g0xx_hal_msp.h
diff --git a/myapps/OLD/first-hal/src/main.c b/myapps/first-hal/src/main.c
similarity index 100%
rename from myapps/OLD/first-hal/src/main.c
rename to myapps/first-hal/src/main.c
diff --git a/myapps/OLD/first-hal/src/stm32g0xx_hal_msp.c b/myapps/first-hal/src/stm32g0xx_hal_msp.c
similarity index 100%
rename from myapps/OLD/first-hal/src/stm32g0xx_hal_msp.c
rename to myapps/first-hal/src/stm32g0xx_hal_msp.c
diff --git a/myapps/OLD/first/Makefile b/myapps/first/Makefile
similarity index 100%
rename from myapps/OLD/first/Makefile
rename to myapps/first/Makefile
diff --git a/myapps/OLD/first/Makefile.bkp b/myapps/first/Makefile.bkp
similarity index 100%
rename from myapps/OLD/first/Makefile.bkp
rename to myapps/first/Makefile.bkp
diff --git a/myapps/OLD/first/hal.mk b/myapps/first/hal.mk
similarity index 100%
rename from myapps/OLD/first/hal.mk
rename to myapps/first/hal.mk
diff --git a/myapps/OLD/first/src/main.c b/myapps/first/src/main.c
similarity index 100%
rename from myapps/OLD/first/src/main.c
rename to myapps/first/src/main.c
diff --git a/myapps/ll-hal-test/Makefile b/myapps/ll-hal-test/Makefile
deleted file mode 100644
index 8b57569..0000000
--- a/myapps/ll-hal-test/Makefile
+++ /dev/null
@@ -1,154 +0,0 @@
-######################################
-# target
-######################################
-TARGET = stm32g0_blinky
-PART = STM32G030xx
-PYOCD_TARGET = stm32g030f6px
-
-
-######################################
-# building variables
-######################################
-# debug build?
-DEBUG = 1
-# optimization for size
-OPT = -Os
-
-
-#######################################
-# paths
-#######################################
-# Build path
-BUILD_DIR = build
-VND_DIR = ../../vendor
-
-######################################
-# source
-######################################
-# C sources
-include hal.mk
-C_SOURCES += \
-$(VND_DIR)/STM32CubeG0/Drivers/CMSIS/Device/ST/STM32G0xx/Source/Templates/system_stm32g0xx.c \
-src/main.c
-
-
-# ASM sources
-ASM_SOURCES =  \
-$(VND_DIR)/STM32CubeG0/Drivers/CMSIS/Device/ST/STM32G0xx/Source/Templates/gcc/startup_stm32g030xx.s
-
-#######################################
-# binaries
-#######################################
-PREFIX = arm-none-eabi-
-
-CC = $(PREFIX)gcc
-CP = $(PREFIX)objcopy
-#SZ = $(PREFIX)size
-
-BIN = $(CP) -O binary -S
-
-#######################################
-# CFLAGS
-#######################################
-
-ifeq ($(DEBUG), 1)
-DEBUG_FLAGS = -gdwarf-3
-endif
-
-# cpu
-CPU = \
- -mcpu=cortex-m0plus
-
-DEFINES = -D$(PART)
-
-# fpu
-FPU = 
-
-# float-abi
-FLOAT-ABI =
-
-# mcu
-MCU = $(CPU) $(FPU) $(FLOAT-ABI)
-
-# C includes
-C_INCLUDES +=  \
- -Isrc/inc \
- -I$(VND_DIR)/STM32CubeG0/Drivers/CMSIS/Core/Include \
- -I$(VND_DIR)/STM32CubeG0/Drivers/CMSIS/Device/ST/STM32G0xx/Include
-
-# compile gcc flags
-ADDN_CFLAGS = \
- -Wall \
- -fdata-sections \
- -ffunction-sections
-
-CFLAGS = $(MCU) $(ADDN_CFLAGS) $(C_INCLUDES) $(DEBUG_FLAGS) $(OPT) $(DEFINES)
-
-
-# Generate dependency information
-#CFLAGS += -MMD -MP -MF"$(@:%.o=%.d)"
-
-
-ASFLAGS = $(MCU) $(DEBUG_FLAGS) $(OPT) -Wa,--warn
-
-#######################################
-# LDFLAGS
-#######################################
-# link script
-LDSCRIPT = $(VND_DIR)/Ld/STM32G030F6MX_FLASH.ld
-
-LIBDIR = 
-LDFLAGS =  \
- $(MCU)  \
- -T $(LDSCRIPT) \
- --specs=nano.specs \
- -specs=nosys.specs -lc -lm \
- -Wl,--gc-sections \
- -Wl,--print-memory-usage \
- -Wl,--no-warn-rwx-segments
-
-# default action: build all
-all: $(BUILD_DIR)/$(TARGET).elf $(BUILD_DIR)/$(TARGET).bin
-
-
-#######################################
-# build the application
-#######################################
-# list of objects
-OBJECTS = $(addprefix $(BUILD_DIR)/,$(notdir $(C_SOURCES:.c=.o)))
-vpath %.c $(sort $(dir $(C_SOURCES)))
-
-# list of ASM program objects
-OBJECTS += $(addprefix $(BUILD_DIR)/,$(notdir $(ASM_SOURCES:.s=.o)))
-vpath %.s $(sort $(dir $(ASM_SOURCES)))
-
-$(BUILD_DIR)/%.o: %.c Makefile | $(BUILD_DIR)
-	$(CC) -c $(CFLAGS) -Wa,-a,-ad,-alms=$(BUILD_DIR)/$(notdir $(<:.c=.lst)) $< -o $@
-
-$(BUILD_DIR)/%.o: %.s Makefile | $(BUILD_DIR)
-	$(CC) -c $(ASFLAGS) $< -o $@
-
-#$(LUAOBJECTS) $(OBJECTS)
-$(BUILD_DIR)/$(TARGET).elf: $(OBJECTS) Makefile
-	$(CC) $(OBJECTS) $(LDFLAGS) -o $@
-
-$(BUILD_DIR)/%.bin: $(BUILD_DIR)/%.elf | $(BUILD_DIR)
-	$(BIN) $< $@	
-	
-$(BUILD_DIR):
-	mkdir $@		
-
-#######################################
-# Program
-#######################################
-
-flash: $(BUILD_DIR)/$(TARGET).bin
-	pyocd load --target $(PYOCD_TARGET) $(BUILD_DIR)/$(TARGET).bin
-
-#######################################
-# clean up
-#######################################
-clean:
-	-rm -fR $(BUILD_DIR)
-  
-# *** EOF ***
diff --git a/myapps/ll-hal-test/hal.mk b/myapps/ll-hal-test/hal.mk
deleted file mode 100644
index 1e754e6..0000000
--- a/myapps/ll-hal-test/hal.mk
+++ /dev/null
@@ -1,13 +0,0 @@
-C_INCLUDES += \
- -I$(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Inc
-
-# "stm32g0xx_ll_bus.h" "stm32g0xx_ll_system.h" "stm32g0xx_ll_cortex.h" : missing
-C_SOURCES += \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_rcc.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_crs.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_exti.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_utils.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_pwr.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_dma.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_gpio.c
-
diff --git a/myapps/ll-hal-test/src/main.c b/myapps/ll-hal-test/src/main.c
deleted file mode 100644
index 363deb8..0000000
--- a/myapps/ll-hal-test/src/main.c
+++ /dev/null
@@ -1,66 +0,0 @@
-
-
-#define LED_Pin LL_GPIO_PIN_4
-#define LED_GPIO_Port GPIOA
-
-#include "stm32g0xx_ll_rcc.h"
-#include "stm32g0xx_ll_bus.h"
-#include "stm32g0xx_ll_crs.h"
-#include "stm32g0xx_ll_system.h"
-#include "stm32g0xx_ll_exti.h"
-#include "stm32g0xx_ll_cortex.h"
-#include "stm32g0xx_ll_utils.h"
-#include "stm32g0xx_ll_pwr.h"
-#include "stm32g0xx_ll_dma.h"
-#include "stm32g0xx_ll_gpio.h"
-
-void SystemClock_Config(void)
-{
-  LL_FLASH_SetLatency(LL_FLASH_LATENCY_2);
-  while(LL_FLASH_GetLatency() != LL_FLASH_LATENCY_2);
-
-  /* HSI configuration and activation */
-  LL_RCC_HSI_Enable();
-  while(LL_RCC_HSI_IsReady() != 1);
-
-  /* Main PLL configuration and activation */
-  LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_HSI, LL_RCC_PLLM_DIV_1, 8, LL_RCC_PLLR_DIV_2);
-  LL_RCC_PLL_Enable();
-  LL_RCC_PLL_EnableDomain_SYS();
-  while(LL_RCC_PLL_IsReady() != 1);
-
-  /* Set AHB prescaler*/
-  LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
-
-  /* Sysclk activation on the main PLL */
-  LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL);
-  while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL);
-
-  /* Set APB1 prescaler*/
-  LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
-  LL_Init1msTick(64000000);
-  /* Update CMSIS variable (which can be updated also through SystemCoreClockUpdate function) */
-  LL_SetSystemCoreClock(64000000);
-}
-
-
-int main(void)
-{
-  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
-  LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_SYSCFG);
-  LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);
-  /** Disable the internal Pull-Up in Dead Battery pins of UCPD peripheral */
-  //LL_SYSCFG_DisableDBATT(LL_SYSCFG_UCPD1_STROBE | LL_SYSCFG_UCPD2_STROBE);
-  
-  SystemClock_Config();
-  
-  LL_IOP_GRP1_EnableClock(LL_IOP_GRP1_PERIPH_GPIOA);
-  LL_GPIO_SetPinMode(LED_GPIO_Port, LL_GPIO_PIN_4, LL_GPIO_MODE_OUTPUT);
-  
-  while(1)
-  {
-    LL_GPIO_TogglePin(LED_GPIO_Port, LED_Pin);
-    LL_mDelay(250);
-  }
-}
-
diff --git a/myapps/practice/00-uart-tx/Makefile b/myapps/practice/00-uart-tx/Makefile
index 530f750..fb656c3 100644
--- a/myapps/practice/00-uart-tx/Makefile
+++ b/myapps/practice/00-uart-tx/Makefile
@@ -50,14 +50,10 @@ BIN = $(CP) -O binary -S
 #######################################
 # CFLAGS
 #######################################
-
-ifeq ($(DEBUG), 1)
-DEBUG_FLAGS = -gdwarf-3
-endif
-
 # cpu
 CPU = \
- -mcpu=cortex-m0plus
+ -mcpu=cortex-m0plus \
+ -mthumb
 
 DEFINES = -D$(PART)
 
@@ -79,18 +75,21 @@ C_INCLUDES +=  \
 # compile gcc flags
 ADDN_CFLAGS = \
  -Wall \
+ -fno-common \
  -fdata-sections \
  -ffunction-sections
 
-CFLAGS = $(MCU) $(ADDN_CFLAGS) $(C_INCLUDES) $(DEBUG_FLAGS) $(OPT) $(DEFINES)
+CFLAGS = $(MCU) $(ADDN_CFLAGS) $(C_INCLUDES) $(OPT) $(DEFINES)
+
+ifeq ($(DEBUG), 1)
+CFLAGS += -ggdb3
+endif
 
 
 # Generate dependency information
 #CFLAGS += -MMD -MP -MF"$(@:%.o=%.d)"
 
 
-ASFLAGS = $(MCU) $(DEBUG_FLAGS) $(OPT) -Wa,--warn
-
 #######################################
 # LDFLAGS
 #######################################
@@ -102,7 +101,6 @@ LDFLAGS =  \
  $(MCU)  \
  -T $(LDSCRIPT) \
  --specs=nano.specs \
- -specs=nosys.specs -lc -lm \
  -Wl,--gc-sections \
  -Wl,--print-memory-usage \
  -Wl,--no-warn-rwx-segments
@@ -118,19 +116,12 @@ all: $(BUILD_DIR)/$(TARGET).elf $(BUILD_DIR)/$(TARGET).bin
 OBJECTS = $(addprefix $(BUILD_DIR)/,$(notdir $(C_SOURCES:.c=.o)))
 vpath %.c $(sort $(dir $(C_SOURCES)))
 
-# list of ASM program objects
-OBJECTS += $(addprefix $(BUILD_DIR)/,$(notdir $(ASM_SOURCES:.s=.o)))
-vpath %.s $(sort $(dir $(ASM_SOURCES)))
-
 $(BUILD_DIR)/%.o: %.c Makefile | $(BUILD_DIR)
 	$(CC) -c $(CFLAGS) -Wa,-a,-ad,-alms=$(BUILD_DIR)/$(notdir $(<:.c=.lst)) $< -o $@
 
-$(BUILD_DIR)/%.o: %.s Makefile | $(BUILD_DIR)
-	$(CC) -c $(ASFLAGS) $< -o $@
-
 #$(LUAOBJECTS) $(OBJECTS)
 $(BUILD_DIR)/$(TARGET).elf: $(OBJECTS) Makefile
-	$(CC) $(OBJECTS) $(LDFLAGS) -o $@
+	$(CC) $(OBJECTS) $(LDFLAGS) $(ASM_SOURCES) -o $@
 
 $(BUILD_DIR)/%.bin: $(BUILD_DIR)/%.elf | $(BUILD_DIR)
 	$(BIN) $< $@	
diff --git a/myapps/practice/00-uart-tx/hal.mk b/myapps/practice/00-uart-tx/hal.mk
index fa8b90a..62dacbf 100644
--- a/myapps/practice/00-uart-tx/hal.mk
+++ b/myapps/practice/00-uart-tx/hal.mk
@@ -1,14 +1,20 @@
 C_INCLUDES += \
  -I$(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Inc
 
-# "stm32g0xx_ll_bus.h" "stm32g0xx_ll_system.h" "stm32g0xx_ll_cortex.h" : missing
-C_SOURCES += \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_rcc.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_crs.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_exti.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_utils.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_pwr.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_dma.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_gpio.c \
- $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_ll_usart.c
+
+C_SOURCES += \
+ $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal.c \
+ $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_cortex.c \
+ $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_pwr.c \
+ $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_pwr_ex.c \
+ $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_rcc.c \
+ $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_rcc_ex.c \
+ $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_exti.c \
+ $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_dma.c \
+ $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_dma_ex.c \
+ $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_flash.c \
+ $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_flash_ex.c \
+ $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_gpio.c \
+ $(VND_DIR)/STM32CubeG0/Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_uart.c \
+ src/stm32g0xx_hal_msp.c
 
diff --git a/myapps/OLD/practice/00-uart-tx/src/inc/stm32g0xx_hal_conf.h b/myapps/practice/00-uart-tx/src/inc/stm32g0xx_hal_conf.h
similarity index 100%
rename from myapps/OLD/practice/00-uart-tx/src/inc/stm32g0xx_hal_conf.h
rename to myapps/practice/00-uart-tx/src/inc/stm32g0xx_hal_conf.h
diff --git a/myapps/OLD/practice/00-uart-tx/src/inc/stm32g0xx_hal_msp.h b/myapps/practice/00-uart-tx/src/inc/stm32g0xx_hal_msp.h
similarity index 100%
rename from myapps/OLD/practice/00-uart-tx/src/inc/stm32g0xx_hal_msp.h
rename to myapps/practice/00-uart-tx/src/inc/stm32g0xx_hal_msp.h
diff --git a/myapps/practice/00-uart-tx/src/main.c b/myapps/practice/00-uart-tx/src/main.c
index a7491ab..fcc20c3 100644
--- a/myapps/practice/00-uart-tx/src/main.c
+++ b/myapps/practice/00-uart-tx/src/main.c
@@ -1,112 +1,60 @@
+// Tx/Rx: PA09[PA11]/PA10[PA12]
 
+//#include <string.h>
+//#include <stdio.h>
+#include "stm32g0xx_hal_msp.h"
 
-#include "stm32g0xx_ll_rcc.h"
-#include "stm32g0xx_ll_bus.h"
-#include "stm32g0xx_ll_crs.h"
-#include "stm32g0xx_ll_system.h"
-#include "stm32g0xx_ll_exti.h"
-#include "stm32g0xx_ll_cortex.h"
-#include "stm32g0xx_ll_utils.h"
-#include "stm32g0xx_ll_pwr.h"
-#include "stm32g0xx_ll_dma.h"
-#include "stm32g0xx_ll_gpio.h"
-#include "stm32g0xx_ll_usart.h"
+UART_HandleTypeDef huart1;
 
-void SystemClock_Config(void)
+char buffer[] = "Hello World\r\n";
+#define TXBUFFERSIZE  14    //strlen(buffer)
+#define TIMEOUT 0xFFFF
+/*
+int __io_putchar(int ch)
 {
-  LL_FLASH_SetLatency(LL_FLASH_LATENCY_2);
-  while(LL_FLASH_GetLatency() != LL_FLASH_LATENCY_2);
-
-  /* HSI configuration and activation */
-  LL_RCC_HSI_Enable();
-  while(LL_RCC_HSI_IsReady() != 1);
-
-  /* Main PLL configuration and activation */
-  LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_HSI, LL_RCC_PLLM_DIV_1, 8, LL_RCC_PLLR_DIV_2);
-  LL_RCC_PLL_Enable();
-  LL_RCC_PLL_EnableDomain_SYS();
-  while(LL_RCC_PLL_IsReady() != 1);
-
-  /* Set AHB prescaler*/
-  LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
-
-  /* Sysclk activation on the main PLL */
-  LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL);
-  while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL);
-
-  /* Set APB1 prescaler*/
-  LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
-  LL_Init1msTick(64000000);
-  /* Update CMSIS variable (which can be updated also through SystemCoreClockUpdate function) */
-  LL_SetSystemCoreClock(64000000);
+  HAL_UART_Transmit(&huart1, (uint8_t *)&ch, 1, TIMEOUT);
+  return ch;
 }
+*/
+/*
+setvbuf(stout, NULL, _IOLBF, 0);
 
-void BSP_USART_Config(uint32_t baudRate)
+int _write (int file, const void * ptr, size_t len)
 {
-    LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_USART2);
-
-    /* USART Init */
-    LL_USART_SetBaudRate(USART2, SystemCoreClock, LL_USART_PRESCALER_DIV1, LL_USART_OVERSAMPLING_16, baudRate);
-    LL_USART_SetDataWidth(USART2, LL_USART_DATAWIDTH_8B);
-    LL_USART_SetStopBitsLength(USART2, LL_USART_STOPBITS_1);
-    LL_USART_SetParity(USART2, LL_USART_PARITY_NONE);
-    LL_USART_SetHWFlowCtrl(USART2, LL_USART_HWCONTROL_NONE);
-    LL_USART_SetTransferDirection(USART2, LL_USART_DIRECTION_TX_RX);
-    LL_USART_Enable(USART2);
-    LL_USART_ClearFlag_TC(USART2);
-
-    /**USART GPIO Configuration
-    PA2     ------> USART2_TX
-    PA3     ------> USART2_RX
-    */
-    LL_IOP_GRP1_EnableClock(LL_IOP_GRP1_PERIPH_GPIOA);
-
-    LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_2, LL_GPIO_MODE_ALTERNATE);
-    LL_GPIO_SetPinSpeed(GPIOA, LL_GPIO_PIN_2, LL_GPIO_SPEED_FREQ_VERY_HIGH);
-    LL_GPIO_SetPinPull(GPIOA, LL_GPIO_PIN_2, LL_GPIO_PULL_UP);
-    LL_GPIO_SetAFPin_0_7(GPIOA, LL_GPIO_PIN_2, LL_GPIO_AF_1);
-
-    LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_3, LL_GPIO_MODE_ALTERNATE);
-    LL_GPIO_SetPinSpeed(GPIOA, LL_GPIO_PIN_3, LL_GPIO_SPEED_FREQ_VERY_HIGH);
-    LL_GPIO_SetPinPull(GPIOA, LL_GPIO_PIN_3, LL_GPIO_PULL_UP);
-    LL_GPIO_SetAFPin_0_7(GPIOA, LL_GPIO_PIN_3, LL_GPIO_AF_1);
-
-//#if defined (__GNUC__) && !defined (__clang__)
-    // To avoid io buffer
-//    setvbuf(stdout, NULL, _IONBF, 0);
-//    setvbuf(stdin, NULL, _IONBF, 0);
-//#endif
+  HAL_UART_Transmit(&huart1, ptr, len, TIMEOUT);
+  return len;
 }
-
-void BSP_UART_TxChar(char ch)
+*/
+static void uart_init(void)
 {
-    LL_USART_TransmitData8(USART2, ch);
-    while (!LL_USART_IsActiveFlag_TC(USART2));
-    LL_USART_ClearFlag_TC(USART2);
-}
 
-void BSP_UART_TxString(char *str)
-{
-    while (*str) BSP_UART_TxChar(*str++);
+  huart1.Instance = USART1;   // Defined in CMSIS header as peripheral address
+  huart1.Init.BaudRate = 115200;
+  huart1.Init.WordLength = UART_WORDLENGTH_8B;
+  huart1.Init.StopBits = UART_STOPBITS_1;
+  huart1.Init.Parity = UART_PARITY_NONE;
+  huart1.Init.Mode = UART_MODE_TX_RX;
+  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
+  huart1.Init.OverSampling = UART_OVERSAMPLING_16;
+  huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
+  huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
+  huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
+  while (HAL_UART_Init(&huart1) != HAL_OK);
+
 }
 
 
 int main(void)
 {
-  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
-  LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_SYSCFG);
-  LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);
-  /** Disable the internal Pull-Up in Dead Battery pins of UCPD peripheral */
-  //LL_SYSCFG_DisableDBATT(LL_SYSCFG_UCPD1_STROBE | LL_SYSCFG_UCPD2_STROBE);
-  
+  HAL_Init();
   SystemClock_Config();
-  
-  BSP_USART_Config(115200);
+  uart_init();
   
   while(1)
   {
-    BSP_UART_TxString("Hello World\r\n");
-    LL_mDelay(500);
+    HAL_UART_Transmit(&huart1, (uint8_t *)buffer, TXBUFFERSIZE, TIMEOUT);
+    //printf("Hello World\r\n");
+    HAL_Delay(100);
   }
-  
 }
+
diff --git a/myapps/OLD/practice/00-uart-tx/src/stm32g0xx_hal_msp.c b/myapps/practice/00-uart-tx/src/stm32g0xx_hal_msp.c
similarity index 100%
rename from myapps/OLD/practice/00-uart-tx/src/stm32g0xx_hal_msp.c
rename to myapps/practice/00-uart-tx/src/stm32g0xx_hal_msp.c