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/*
* File : board.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2012 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
* 2010-10-5 Wangmeng sep4020 implementation
*/
#include <rthw.h>
#include <rtthread.h>
#include <sep4020.h>
#include <drivers/dev_serial.h>
void rt_hw_serial_putc(const char c);
#define UART0 ((struct uartport *)UART0_BASE)
struct rt_device uart0_device;
struct serial_int_rx uart0_int_rx;
struct serial_device uart0 =
{
UART0,
&uart0_int_rx,
RT_NULL
};
/**
* This function will handle rtos timer
*/
void rt_timer_handler(int vector, void *param)
{
rt_uint32_t clear_int;
rt_tick_increase();
/*Clear timer interrupt*/
clear_int = *(RP)TIMER_T1ISCR;
*(RP)TIMER_T1ISCR=clear_int;
}
/**
* This function will handle serial
*/
void rt_serial_handler(int vector, void *param)
{
//rt_kprintf("in rt_serial_handler\n");
rt_int32_t stat = *(RP)UART0_IIR ;
char c;
RT_UNUSED(c);
/*Received data*/
if (((stat & 0x0E) >> 1) == 0x02)
{
rt_hw_serial_isr(&uart0_device);
}
else
{
/*clear the timeout interrupt*/
while (uart0.uart_device->lsr & USTAT_RCV_READY)
c = uart0.uart_device->dlbl_fifo.rxfifo;
}
}
/**
* This function will init led on the board
*/
static void rt_hw_board_led_init(void)
{
/* PE3 PE4 PE5 for led */
*(RP)GPIO_PORTE_SEL |=0x38; /* GPIO */
*(RP)GPIO_PORTE_DIR &= ~0x38; /* output*/
*(RP)GPIO_PORTE_DATA &= ~0x38; /* low */
}
/**
* This function will init timer4 for system ticks
*/
void rt_hw_timer_init(void)
{
/*Set timer1*/
*(RP)TIMER_T1LCR = 880000;
*(RP)TIMER_T1CR = 0x06;
rt_hw_interrupt_install(INTSRC_TIMER1, rt_timer_handler, RT_NULL, "tick");
rt_hw_interrupt_umask(INTSRC_TIMER1);
/*Enable timer1*/
*(RP)TIMER_T1CR |= 0x01;
}
/**
* This function will handle init uart
*/
void rt_hw_uart_init(void)
{
const rt_int32_t sysclk = 72000000;
/*Set data bit:8*/
*(RP)(UART0_LCR) = 0x83;
/*Set baud rate high*/
*(RP)(UART0_DLBH) = (sysclk/16/115200) >> 8;
/*Set baud rate low*/
*(RP)(UART0_DLBL) = (sysclk/16/115200) & 0xff;
*(RP)(UART0_LCR) = 0x83&(~(0x1 << 7));
/*Set trigger level*/
*(RP)(UART0_FCR) = 0x0;
*(RP)(UART0_IER) = 0x0;
/*Enable rx interrupt*/
*(RP)(UART0_IER) |= 0x01;
/*Disable tx interrupt*/
*(RP)(UART0_IER) &= ~(0x1<<1);
rt_hw_interrupt_install(INTSRC_UART0, rt_serial_handler, RT_NULL, "UART0");
rt_hw_interrupt_umask(INTSRC_UART0);
/* register uart0 */
rt_hw_serial_register(&uart0_device, "uart0",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
&uart0);
}
void rt_hw_board_init(void)
{
/* initialize uart */
rt_hw_uart_init();
// rt_hw_board_led_init();
rt_hw_timer_init();
}
/* write one character to serial, must not trigger interrupt */
void rt_hw_serial_putc(const char c)
{
/*
to be polite with serial console add a line feed
to the carriage return character
*/
if (c=='\n')
rt_hw_serial_putc('\r');
while (!((*(RP)UART0_LSR) & 0x40));
*(RP)(UART0_BASE) = c;
}
/**
* 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_serial_putc(*str++);
}
}
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