Merge pull request #3926 from geniusgogo/master

[stm32/gpio]Optimized the pin-index algorithm

bsp/stm32/libraries/HAL_Drivers/drv_gpio.h

@@ -8,6 +8,7 @@
  * 2018-11-06     balanceTWK        first version
  * 2020-06-16     thread-liu        add stm32mp1
  * 2020-09-01     thread-liu        add GPIOZ 
+ * 2020-09-18     geniusgogo        optimization design pin-index algorithm
  */
 
 #ifndef __DRV_GPIO_H__
@@ -16,6 +17,10 @@
 #include <drv_common.h>
 #include <board.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define __STM32_PORT(port)  GPIO##port##_BASE
 
 #if defined(SOC_SERIES_STM32MP1)
@@ -24,24 +29,6 @@
 #define GET_PIN(PORTx,PIN) (rt_base_t)((16 * ( ((rt_base_t)__STM32_PORT(PORTx) - (rt_base_t)GPIOA_BASE)/(0x0400UL) )) + PIN)
 #endif
 
-#define __STM32_PIN(index, gpio, gpio_index)                                \
-    {                                                                       \
-        index, GPIO##gpio, GPIO_PIN_##gpio_index                            \
-    }
-
-#define __STM32_PIN_RESERVE                                                 \
-    {                                                                       \
-        -1, 0, 0                                                            \
-    }
-
-/* STM32 GPIO driver */
-struct pin_index
-{
-    int index;
-    GPIO_TypeDef *gpio;
-    uint32_t pin;
-};
-
 struct pin_irq_map
 {
     rt_uint16_t pinbit;
@@ -50,5 +37,9 @@ struct pin_irq_map
 
 int rt_hw_pin_init(void);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* __DRV_GPIO_H__ */