[bsp] Add pin equipment for stm32f429-apollo

bsp/stm32f429-apollo/drivers/SConscript

@@ -29,7 +29,7 @@ if GetDepend(['RT_USING_I2C']) or GetDepend('RT_USING_LWIP'):
 
 # add gpio drivers.
 if GetDepend('RT_USING_PIN'):
-    src += ['gpio.c']
+    src += ['drv_gpio.c']
 
 # add spi drivers.
 if GetDepend('RT_USING_SPI'):

bsp/stm32f429-apollo/drivers/board.h

@@ -77,6 +77,8 @@ void rt_hw_board_init(void);
 
 #define FINSH_DEVICE_NAME   CONSOLE_DEVICE
 
+#define STM32F4xx_PIN_NUMBERS 176
+
 void Error_Handler(void);
 
 #endif

bsp/stm32f429-apollo/drivers/drv_gpio.h

@@ -0,0 +1,30 @@
+/*
+ * File      : drv_gpio.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2015, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2015-01-05     Bernard      the first version
+ */
+#ifndef GPIO_H__
+#define GPIO_H__
+
+
+struct stm32_hw_pin_userdata
+{
+    int pin;
+    uint32_t mode;
+};
+
+#define PIN_USERDATA_END {-1,0}
+
+extern struct stm32_hw_pin_userdata stm32_pins[];
+
+int rt_hw_pin_init(void);
+
+#endif