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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2013-7-14 Peng Fan sep6200 implementation
*/
/**
* @addtogroup sep6200
*/
/*@{*/
#include <rthw.h>
#include <rtthread.h>
#include <drivers/dev_serial.h>
#include <sep6200.h>
void rt_hw_serial_putc(const char c);
#define UART0 ((struct uartport *)SEP6200_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;
/* clear timer interrupt */
if (read_reg(SEP6200_TIMER_T2IMSR) & 0x1)
clear_int = read_reg(SEP6200_TIMER_T2ISCR);
rt_tick_increase();
}
/*
* This function will handle serial interrupt
*/
void rt_serial_handler(int vector, void *param)
{
rt_uint32_t num;
switch (vector) {
case INTSRC_UART0:
/*No interrupt*/
if ((*(RP)SEP6200_UART0_IIR & 0x1))
return;
/*Get the serial interrupt num*/
num = (*(RP)SEP6200_UART0_IIR >> 1) & 0x7;
/*Receive or timeout*/
if ((num == 6) || (num == 2))
rt_hw_serial_isr(&uart0_device);
break;
/*1,2,3 not implemented now, do in future*/
case INTSRC_UART1:
break;
case INTSRC_UART2:
break;
case INTSRC_UART3:
break;
}
}
/*
* This function will init timer2 for system ticks
*/
#define BUS4_FREQ 320000000UL
#define TIMER_CLK BUS4_FREQ
#define HZ 100
void rt_hw_timer_init(void)
{
*(RP)SEP6200_TIMER_T2LCR = (TIMER_CLK + HZ / 2) / HZ;
*(RP)SEP6200_TIMER_T2CR = 0x6;
rt_hw_interrupt_install(INTSRC_TIMER1, rt_timer_handler, RT_NULL, "timer");
rt_hw_interrupt_umask(INTSRC_TIMER1);
/* start the timer */
*(RP)SEP6200_TIMER_T2CR |= 0x1;
}
/*
* This function will init uart
*/
#define UART_CLK 60000000UL
void rt_hw_uart_init(void)
{
const rt_uint32_t uartclk = UART_CLK;
*(RP)(SEP6200_UART0_LCR) = 0x83;
*(RP)(SEP6200_UART0_DLBH) = (uartclk/16/115200) >> 8;
*(RP)(SEP6200_UART0_DLBL) = (uartclk/16/115200) & 0xff;
*(RP)(SEP6200_UART0_LCR) = 0x83 & (~(0x1 << 7));
*(RP)(SEP6200_UART0_FCR) = 0x0;
*(RP)(SEP6200_UART0_MCR) = 0x0;
*(RP)(SEP6200_UART0_IER) = 0x0;
/* Enable rx interrupt*/
*(RP)(SEP6200_UART0_IER) |= 0x1;
/* Disable tx interrupt*/
*(RP)(SEP6200_UART0_IER) &= ~(0x1 << 1);
rt_hw_interrupt_install(INTSRC_UART0, rt_serial_handler, RT_NULL, "uart0");
rt_hw_interrupt_umask(INTSRC_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)
{
int i = 0;
rt_hw_uart_init();
rt_hw_timer_init();
}
/*
* Write one char to serial, must not trigger interrupt
*/
void rt_hw_serial_putc(const char c)
{
if (c == '\n')
rt_hw_serial_putc('\r');
while (!((*(RP)SEP6200_UART0_LSR) & 0x40));
*(RP)(SEP6200_UART0_TXFIFO) = c;
}
/**
* This function is used by rt_kprintf to display a string on console.
*
* @param str the displayed string^M
*/
void rt_hw_console_output(const char *str)
{
while (*str) {
rt_hw_serial_putc(*str++);
}
}
/*@}*/
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