141 lines
3.1 KiB
C
141 lines
3.1 KiB
C
/*
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* File : board.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006, RT-Thread Develop Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://openlab.rt-thread.com/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2006-08-23 Bernard first implementation
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*/
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#include <rtthread.h>
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#include <rthw.h>
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#include <sep4020.h>
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#include "board.h"
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#include "serial.h"
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/**
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* @addtogroup sep4020
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*/
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/*@{*/
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extern rt_uint32_t rt_hw_get_clock(void);
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/* uart0 */
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#define UART0 ((struct uartport *)UART0BASE)
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struct serial_int_rx uart0_int_rx;
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struct serial_device uart0 =
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{
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UART0,
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&uart0_int_rx,
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RT_NULL
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};
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struct rt_device uart0_device;
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/**
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* This is the timer interrupt service routine.
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* @param vector the irq number for timer
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*/
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void rt_hw_timer_handler(int vector)
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{
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/* clear interrupt */
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TIMER_T1ISCR;
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/* increase a tick */
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rt_tick_increase();
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}
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/**
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* This is the uart0 interrupt service routine.
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* @param vector the irq number for uart0
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*/
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void rt_serial_handler(int vector)
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{
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rt_hw_serial_isr(&uart0_device);
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}
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/**
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* This function will handle init uart.
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*/
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void rt_hw_uart_init(void)
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{
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rt_uint32_t baud;
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rt_uint32_t sysclock;
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sysclock = rt_hw_get_clock();
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/* caculate baud rate register */
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baud = sysclock/16/BR;
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/* LCR */
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uart0.uart_device->lcr = 0x83;
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/* DLBH, IER */
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uart0.uart_device->dlbh_ier = (baud>>8)&0xff;;
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/* DLBL */
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uart0.uart_device->dlbl_rxfifo_txfifo = baud&0xff;
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/* LCR */
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uart0.uart_device->lcr = 0x03;
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/* IER */
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uart0.uart_device->dlbh_ier = 0x01;
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/* FCR */
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uart0.uart_device->iir_fcr = 0x00;
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rt_hw_serial_register(&uart0_device, "uart0",
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RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
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&uart0);
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/* install uart isr */
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INTC_IER |= (1<<INT_UART0);
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rt_hw_interrupt_install(INT_UART0, rt_serial_handler, RT_NULL);
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rt_hw_interrupt_umask(INT_UART0);
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}
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/**
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* This function will init led on the board
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*/
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static void rt_hw_board_led_init(void)
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{
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/* PE3 PE4 PE5 for led */
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GPIO_PORTE_SEL |=0x38; /* GPIO */
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GPIO_PORTE_DIR &= ~0x38; /* output*/
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GPIO_PORTE_DATA &= ~0x38; /* low */
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}
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/**
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* This function will init timer1 for system ticks
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*/
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static void rt_hw_timer_init(void)
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{
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TIMER_T1CR = 0x06; /* reload mode and interrupt enable */
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TIMER_T1LCR = 0xAFC80; /* 10ms under 72MHz 0xAFC80=720000 */
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INTC_IER |= (1<<INT_TIMER1); /* interrupt enable */
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rt_hw_interrupt_install(INT_TIMER1, rt_hw_timer_handler, RT_NULL);
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rt_hw_interrupt_umask(INT_TIMER1);
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TIMER_T1CR |= 0x01; /* enable the timer 1 */
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}
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/**
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* This function will initial sam7x board.
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*/
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void rt_hw_board_init()
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{
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/* init hardware uart */
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rt_hw_uart_init();
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rt_console_set_device("uart0");
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/* init led */
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rt_hw_board_led_init();
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/* init timer for tick */
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rt_hw_timer_init();
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}
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/*@}*/
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