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/*
* File : board.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2009 RT-Thread Develop Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://openlab.rt-thread.com/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2009-05-16 Bernard first implementation
*/
#include <rthw.h>
#include <rtthread.h>
#include <board.h>
#include <inc/hw_types.h>
#include <inc/hw_memmap.h>
#include <inc/hw_uart.h>
#include <driverlib/uart.h>
#include <driverlib/gpio.h>
#include <driverlib/sysctl.h>
#include <driverlib/systick.h>
#include <driverlib/interrupt.h>
#include <driverlib/fpu.h>
static void rt_hw_console_init(void);
/**
* @addtogroup LM3S
*/
/*@{*/
extern void rt_hw_interrupt_thread_switch(void);
/**
* This is the timer interrupt service routine.
*
*/
void rt_hw_timer_handler(void)
{
/* enter interrupt */
rt_interrupt_enter();
rt_tick_increase();
/* leave interrupt */
rt_interrupt_leave();
rt_hw_interrupt_thread_switch();
}
/**
* This is the ethernet interrupt service routine.
*
*/
void rt_hw_eth_handler(void)
{
#ifdef RT_USING_LWIP
extern void luminaryif_isr(void);
/* enter interrupt */
rt_interrupt_enter();
/* luminary ethernet interface */
luminaryif_isr();
/* leave interrupt */
rt_interrupt_leave();
#endif
}
/**
* This function will initial LM3S board.
*/
void rt_hw_board_init()
{
//
// Enable lazy stacking for interrupt handlers. This allows floating-point
// instructions to be used within interrupt handlers, but at the expense of
// extra stack usage.
//
FPULazyStackingEnable();
// set sysclock to 80M
SysCtlClockSet(SYSCTL_SYSDIV_2_5 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN | SYSCTL_XTAL_16MHZ);
/* init systick */
SysTickDisable();
SysTickPeriodSet(SysCtlClockGet()/RT_TICK_PER_SECOND);
SysTickIntEnable();
SysTickEnable();
/* enable ssio */
//SysCtlPeripheralEnable(SYSCTL_PERIPH_SSI0);
#if LM3S_EXT_SRAM == 1
/* init SDRAM */
rt_hw_sdram_init();
#endif
/* init console */
rt_hw_console_init();
/* enable interrupt */
IntMasterEnable();
}
/* init console to support rt_kprintf */
static void rt_hw_console_init()
{
/* Enable the UART0 peripherals */
SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
/* Set GPIO A0 and A1 as UART pins. */
GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
/* Configure the UART for 115,200, 8-N-1 operation. */
UARTConfigSetExpClk(UART0_BASE, SysCtlClockGet(), 115200,
(UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE |
UART_CONFIG_PAR_NONE));
}
/* write one character to serial, must not trigger interrupt */
static void rt_hw_console_putc(const char c)
{
if (c == '\n')
while(UARTCharPutNonBlocking(UART0_BASE, '\r') == false);
while(UARTCharPutNonBlocking(UART0_BASE, c) == false);
}
/**
* This function is used by rt_kprintf to display a string on console.
*
* @param str the displayed string
*/
void rt_hw_console_output(const char* str)
{
while (*str)
{
rt_hw_console_putc (*str++);
}
}
/*@}*/
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