166 lines
3.4 KiB
C
166 lines
3.4 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 - 2012 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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* 2009-05-16 Bernard first implementation
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* 2010-10-5 Wangmeng sep4020 implementation
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*/
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#include <rthw.h>
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#include <rtthread.h>
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#include <sep4020.h>
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#include <serial.h>
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void rt_hw_serial_putc(const char c);
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#define UART0 ((struct uartport *)UART0_BASE)
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struct rt_device uart0_device;
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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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/**
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* This function will handle rtos timer
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*/
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void rt_timer_handler(int vector, void *param)
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{
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rt_uint32_t clear_int;
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rt_tick_increase();
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/*Clear timer interrupt*/
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clear_int = *(RP)TIMER_T1ISCR;
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*(RP)TIMER_T1ISCR=clear_int;
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}
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/**
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* This function will handle serial
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*/
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void rt_serial_handler(int vector, void *param)
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{
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//rt_kprintf("in rt_serial_handler\n");
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rt_int32_t stat = *(RP)UART0_IIR ;
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RT_UNUSED char c;
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/*Received data*/
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if (((stat & 0x0E) >> 1) == 0x02)
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{
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rt_hw_serial_isr(&uart0_device);
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}
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else
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{
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/*clear the timeout interrupt*/
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while (uart0.uart_device->lsr & USTAT_RCV_READY)
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c = uart0.uart_device->dlbl_fifo.rxfifo;
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}
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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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*(RP)GPIO_PORTE_SEL |=0x38; /* GPIO */
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*(RP)GPIO_PORTE_DIR &= ~0x38; /* output*/
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*(RP)GPIO_PORTE_DATA &= ~0x38; /* low */
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}
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/**
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* This function will init timer4 for system ticks
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*/
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void rt_hw_timer_init(void)
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{
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/*Set timer1*/
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*(RP)TIMER_T1LCR = 880000;
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*(RP)TIMER_T1CR = 0x06;
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rt_hw_interrupt_install(INTSRC_TIMER1, rt_timer_handler, RT_NULL, "tick");
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rt_hw_interrupt_umask(INTSRC_TIMER1);
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/*Enable timer1*/
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*(RP)TIMER_T1CR |= 0x01;
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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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const rt_int32_t sysclk = 72000000;
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/*Set data bit:8*/
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*(RP)(UART0_LCR) = 0x83;
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/*Set baud rate high*/
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*(RP)(UART0_DLBH) = (sysclk/16/115200) >> 8;
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/*Set baud rate low*/
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*(RP)(UART0_DLBL) = (sysclk/16/115200) & 0xff;
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*(RP)(UART0_LCR) = 0x83&(~(0x1 << 7));
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/*Set trigger level*/
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*(RP)(UART0_FCR) = 0x0;
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*(RP)(UART0_IER) = 0x0;
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/*Enable rx interrupt*/
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*(RP)(UART0_IER) |= 0x01;
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/*Disable tx interrupt*/
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*(RP)(UART0_IER) &= ~(0x1<<1);
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rt_hw_interrupt_install(INTSRC_UART0, rt_serial_handler, RT_NULL, "UART0");
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rt_hw_interrupt_umask(INTSRC_UART0);
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/* register uart0 */
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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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}
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void rt_hw_board_init(void)
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{
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/* initialize uart */
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rt_hw_uart_init();
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// rt_hw_board_led_init();
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rt_hw_timer_init();
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}
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/* write one character to serial, must not trigger interrupt */
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void rt_hw_serial_putc(const char c)
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{
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/*
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to be polite with serial console add a line feed
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to the carriage return character
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*/
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if (c=='\n')
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rt_hw_serial_putc('\r');
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while (!((*(RP)UART0_LSR) & 0x40));
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*(RP)(UART0_BASE) = c;
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}
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/**
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* This function is used by rt_kprintf to display a string on console.
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*
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* @param str the displayed string
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*/
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void rt_hw_console_output(const char *str)
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{
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while (*str)
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{
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rt_hw_serial_putc(*str++);
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}
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}
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