minor clean up. ch32v307 has issue with uart LOG=2 (skipping characters)

hw/bsp/ch32v307/boards/ch32v307v-r1-1v0/debug_uart.c

@@ -101,7 +101,7 @@ void usart_printf_init(uint32_t baudrate)
   USART_ITConfig(USART1, USART_IT_TC, ENABLE);
   USART_Cmd(USART1, ENABLE);
 
-    NVIC_InitTypeDef  NVIC_InitStructure = {0};
+  NVIC_InitTypeDef NVIC_InitStructure = { 0 };
   NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;

hw/bsp/ch32v307/family.c

@@ -106,17 +106,22 @@ void board_init(void) {
 volatile uint32_t system_ticks = 0;
 
 /* Small workaround to support HW stack save/restore */
-void SysTick_Handler(void) __attribute__((naked));
-void SysTick_Handler(void) { 
+void SysTick_Handler (void) __attribute__((naked));
+void SysTick_Handler (void)
+{
   __asm volatile ("call SysTick_Handler_impl; mret");
 }
 
-__attribute__((used)) void SysTick_Handler_impl(void) { 
-  SysTick->SR=0;
+__attribute__((used)) void SysTick_Handler_impl (void)
+{
+  SysTick->SR = 0;
   system_ticks++;
 }
 
-uint32_t board_millis(void) { return system_ticks; }
+uint32_t board_millis (void)
+{
+  return system_ticks;
+}
 
 #endif
 

hw/bsp/ch32v307/family.mk

@@ -13,8 +13,6 @@ CH32V307_SDK_SRC = $(CH32V307_SDK)/EVT/EXAM/SRC
 
 include $(TOP)/$(BOARD_PATH)/board.mk
 
-SKIP_NANOLIB = 1
-
 CFLAGS += \
 	-flto \
 	-march=rv32imac \
@@ -30,9 +28,6 @@ CFLAGS += \
 	-Xlinker --gc-sections \
 	-DBOARD_TUD_MAX_SPEED=OPT_MODE_HIGH_SPEED
 
-LDFLAGS += \
-  -Xlinker --gc-sections --specs=nano.specs --specs=nosys.specs
-
 SRC_C += \
 	src/portable/wch/ch32v307/dcd_usbhs.c \
 	$(CH32V307_SDK_SRC)/Core/core_riscv.c \