fix warning:
When compiling C code containing statements like this:
rt_base_t xx_io_tbl[] =
{
GET_PIN(A,0),
};
the compiler will report:
Warning: #1296-D: extended constant initialiser used
#include <drv_common.h>
#include <board.h>
-#define __STM32_PORT(port) GPIO##port
+#define __STM32_PORT(port) GPIO##port##_BASE
-#define GET_PIN(PORTx,PIN) (rt_base_t)((16 * ( ((rt_base_t)__STM32_PORT(PORTx) - (rt_base_t)GPIOA)/(0x0400UL) )) + PIN)
+#define GET_PIN(PORTx,PIN) (rt_base_t)((16 * ( ((rt_base_t)__STM32_PORT(PORTx) - (rt_base_t)GPIOA_BASE)/(0x0400UL) )) + PIN)
#define __STM32_PIN(index, gpio, gpio_index) \
{ \
