115 lines
1.9 KiB
C
115 lines
1.9 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://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2010-06-25 Bernard first version
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*/
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#include <rtthread.h>
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#include <rthw.h>
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#include "board.h"
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#include "uart.h"
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#include <jz4755.h>
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/**
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* @addtogroup JZ47xx
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*/
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/*@{*/
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/**
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* This is the timer interrupt service routine.
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*/
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void rt_hw_timer_handler()
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{
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/* increase a OS tick */
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rt_tick_increase();
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/* clear flag */
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TCU_TFCR = TCU_TFCR_OSTFLAG;
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}
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/**
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* This function will initial OS timer
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*/
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void rt_hw_timer_init()
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{
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rt_uint32_t val;
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/* disable TCU clock */
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CPM_CLKGR &= ~CPM_CLKGR_TCU;
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TCU_TECR = TCU_TECR_OSTCL;
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/* set */
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OST_DR = RT_TICK_PER_SECOND * 0xcffff;
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/* clear counter */
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OST_CNT = 0;
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#if 0
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switch (RTC_DIV)
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{
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case 1:
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val = OST_TCSR_PRESCALE1;
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break;
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case 4:
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val = OST_TCSR_PRESCALE4;
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break;
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case 16:
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val = OST_TCSR_PRESCALE16;
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break;
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case 64:
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val = OST_TCSR_PRESCALE64;
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break;
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case 256:
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val = OST_TCSR_PRESCALE256;
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break;
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case 1024:
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val = OST_TCSR_PRESCALE1024;
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break;
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default:
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val = OST_TCSR_PRESCALE4;
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break;
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}
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#endif
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#ifdef RTC_SRC_EXTAL
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OST_CSR = (val | OST_TCSR_EXT_EN);
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#else
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OST_CSR = (val | OST_TCSR_PCLK_EN);
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#endif
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TCU_TFCR = TCU_TFCR_OSTFLAG;
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TCU_TMCR = TCU_TMCR_OSTMCL;
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TCU_TESR = TCU_TESR_OSTST;
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rt_hw_interrupt_install(IRQ_TCU0, rt_hw_timer_handler, RT_NULL);
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rt_hw_interrupt_umask (IRQ_TCU0);
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}
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/**
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* This function will initial sam7s64 board.
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*/
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void rt_hw_board_init()
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{
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#ifdef RT_USING_UART
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/* init hardware UART device */
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rt_hw_uart_init();
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#endif
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#ifdef RT_USING_CONSOLE
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/* set console device */
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rt_console_set_device("uart");
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#endif
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/* init operating system timer */
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rt_hw_timer_init();
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}
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/*@}*/
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