1.add gpio/pin_mux/spi/timer/uart register define headers;

2.add gpio driver;

examples/dirver_lib/include/uart.h

@@ -0,0 +1,63 @@
+/*
+ *  Copyright (C) 2010 -2011  Espressif System
+ *
+ */
+
+#ifndef __UART_H__
+#define __UART_H__
+
+#define UART0   0
+#define UART1   1
+
+typedef enum {
+    FIVE_BITS  = 0x0,
+    SIX_BITS   = 0x1,
+    SEVEN_BITS = 0x2,
+    EIGHT_BITS = 0x3
+} UartBitsNum4Char;
+
+typedef enum {
+    ONE_STOP_BIT      = 0,
+    ONE_HALF_STOP_BIT = BIT(2),
+    TWO_STOP_BIT      = BIT(2)
+} UartStopBitsNum;
+
+typedef enum {
+    NONE_BITS = 0,
+    ODD_BITS  = 0,
+    EVEN_BITS = BIT(4)
+} UartParityMode;
+
+typedef enum {
+    STICK_PARITY_DIS = 0,
+    STICK_PARITY_EN  = BIT(3) | BIT(5)
+} UartExistParity;
+
+typedef enum {
+    BIT_RATE_9600   = 9600,
+    BIT_RATE_19200  = 19200,
+    BIT_RATE_38400  = 38400,
+    BIT_RATE_57600  = 57600,
+    BIT_RATE_74880  = 74880,
+    BIT_RATE_115200 = 115200,
+    BIT_RATE_230400 = 230400,
+    BIT_RATE_460800 = 460800,
+    BIT_RATE_921600 = 921600
+} UartBautRate;
+
+typedef enum {
+    NONE_CTRL,
+    HARDWARE_CTRL,
+    XON_XOFF_CTRL
+} UartFlowCtrl;
+
+typedef struct {
+    UartBautRate     baut_rate;
+    UartBitsNum4Char data_bits;
+    UartExistParity  exist_parity;
+    UartParityMode 	 parity;    // chip size in byte
+    UartStopBitsNum  stop_bits;
+    UartFlowCtrl     flow_ctrl;
+} UartDevice;
+
+#endif