fixed sys tick issue.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1702 bbd45198-f89e-11dd-88c7-29a3b14d5316

bsp/lpc1114/board.c

@@ -20,6 +20,7 @@
 
 #include <CMSIS/LPC11xx.h>
 #include <CMSIS/core_cm0.h>
+#include <CMSIS/system_LPC11xx.h>
 
 /**
  * @addtogroup LPC1100
@@ -44,11 +45,11 @@ void rt_hw_timer_handler()
  * This function will initial sam7s64 board.
  */
 void rt_hw_board_init()
-{
+{
 	SystemInit();
 
 	/* init systick */
-	SysTick_Config(0x0007A11F);
+	SysTick_Config(SystemCoreClock);
 
 	/* set pend exception priority */
 	NVIC_SetPriority(PendSV_IRQn, (1<<__NVIC_PRIO_BITS) - 1);

bsp/lpc1114/uart.c

@@ -246,6 +246,9 @@ void rt_hw_uart_init(void)
 	rt_memset(uart->rx_buffer, 0, sizeof(uart->rx_buffer));
 	uart->read_index = uart->save_index = 0;
 
+	uart->parent.rx_indicate = RT_NULL;
+	uart->parent.tx_complete = RT_NULL;
+
 	/* device interface */
 	uart->parent.init 	    = rt_uart_init;
 	uart->parent.open 	    = rt_uart_open;