update version to v2.1.6

libraries/drivers/inc/at32f413_gpio.h

@@ -764,6 +764,7 @@ flag_status gpio_output_data_bit_read(gpio_type *gpio_x, uint16_t pins);
 uint16_t gpio_output_data_read(gpio_type *gpio_x);
 void gpio_bits_set(gpio_type *gpio_x, uint16_t pins);
 void gpio_bits_reset(gpio_type *gpio_x, uint16_t pins);
+void gpio_bits_toggle(gpio_type *gpio_x, uint16_t pins);
 void gpio_bits_write(gpio_type *gpio_x, uint16_t pins, confirm_state bit_state);
 void gpio_port_write(gpio_type *gpio_x, uint16_t port_value);
 void gpio_pin_wp_config(gpio_type *gpio_x, uint16_t pins);

libraries/drivers/src/at32f413_flash.c

@@ -239,7 +239,7 @@ void flash_spim_unlock(void)
 {
   FLASH->unlock3 = FLASH_UNLOCK_KEY1;
   FLASH->unlock3 = FLASH_UNLOCK_KEY2;
-  UNUSED(*(__IO uint32_t*)USD_BASE);
+  UNUSED(*(__IO uint32_t*)USD_BASE);  
 }
 
 /**
@@ -744,8 +744,8 @@ void flash_interrupt_enable(uint32_t flash_int, confirm_state new_state)
   */
 void flash_spim_model_select(flash_spim_model_type mode)
 {
+  UNUSED(*(__IO uint32_t*)USD_BASE);
   FLASH->select = mode;
-
   /* dummy read */
   flash_spim_dummy_read();
 }

libraries/drivers/src/at32f413_gpio.c

@@ -341,6 +341,37 @@ void gpio_bits_reset(gpio_type *gpio_x, uint16_t pins)
   gpio_x->clr = pins;
 }
 
+/**
+  * @brief  toggle the selected data port bits.
+  * @param  gpio_x: to select the gpio peripheral.
+  *         this parameter can be one of the following values:
+  *         GPIOA, GPIOB, GPIOC, GPIOD, GPIOF.
+  * @param  pins: gpio pin number
+  *         parameter can be any combination of gpio_pin_x, gpio_pin_x as following values:
+  *         - GPIO_PINS_0
+  *         - GPIO_PINS_1
+  *         - GPIO_PINS_2
+  *         - GPIO_PINS_3
+  *         - GPIO_PINS_4
+  *         - GPIO_PINS_5
+  *         - GPIO_PINS_6
+  *         - GPIO_PINS_7
+  *         - GPIO_PINS_8
+  *         - GPIO_PINS_9
+  *         - GPIO_PINS_10
+  *         - GPIO_PINS_11
+  *         - GPIO_PINS_12
+  *         - GPIO_PINS_13
+  *         - GPIO_PINS_14
+  *         - GPIO_PINS_15
+  *         - GPIO_PINS_ALL
+  * @retval none
+  */
+void gpio_bits_toggle(gpio_type *gpio_x, uint16_t pins)
+{
+  gpio_x->odt ^= pins;
+}
+
 /**
   * @brief  set or clear the selected data port bit.
   * @param  gpio_x: to select the gpio peripheral.

libraries/drivers/src/at32f413_rtc.c

@@ -58,11 +58,11 @@ void rtc_counter_set(uint32_t counter_value)
 }
 
 /**
-  * @brief  rtc counter get
+  * @brief  rtc lowlevel counter get
   * @param  none
   * @retval rtc counter
   */
-uint32_t rtc_counter_get(void)
+uint32_t rtc_lowlevel_counter_get(void)
 {
   uint32_t cnt = 0;
 
@@ -72,6 +72,28 @@ uint32_t rtc_counter_get(void)
   return cnt;
 }
 
+/**
+  * @brief  rtc counter get
+  * @param  none
+  * @retval rtc counter
+  */
+uint32_t rtc_counter_get(void)
+{
+  uint32_t cnt1 = 0;
+  uint32_t cnt2 = 0;
+
+  while(1)
+  {
+    cnt1 = rtc_lowlevel_counter_get();
+    cnt2 = rtc_lowlevel_counter_get();
+
+    if(cnt1 == cnt2)
+    {
+      return cnt1;
+    }
+  }
+}
+
 /**
   * @brief  rtc divider set
   * @param  div_value (0x0000_0000 ~ 0x000F_FFFF)

libraries/drivers/src/at32f413_usart.c

@@ -90,7 +90,7 @@ void usart_reset(usart_type* usart_x)
   *         this parameter can be one of the following values:
   *         - USART_DATA_8BITS
   *         - USART_DATA_9BITS.
-  *         note：
+  *         note:
   *         - when parity check is disabled, the data bit width is the actual data bit number.
   *         - when parity check is enabled, the data bit width is the actual data bit number minus 1, and the MSB bit is replaced with the parity bit.
   * @param  stop_bit: stop bits transmitted