161 lines
3.4 KiB
C
161 lines
3.4 KiB
C
/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2013-7-14 Peng Fan sep6200 implementation
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*/
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/**
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* @addtogroup sep6200
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*/
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/*@{*/
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#include <rthw.h>
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#include <rtthread.h>
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#include <serial.h>
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#include <sep6200.h>
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void rt_hw_serial_putc(const char c);
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#define UART0 ((struct uartport *)SEP6200_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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/* clear timer interrupt */
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if (read_reg(SEP6200_TIMER_T2IMSR) & 0x1)
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clear_int = read_reg(SEP6200_TIMER_T2ISCR);
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rt_tick_increase();
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}
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/*
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* This function will handle serial interrupt
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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_uint32_t num;
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switch (vector) {
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case INTSRC_UART0:
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/*No interrupt*/
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if ((*(RP)SEP6200_UART0_IIR & 0x1))
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return;
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/*Get the serial interrupt num*/
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num = (*(RP)SEP6200_UART0_IIR >> 1) & 0x7;
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/*Receive or timeout*/
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if ((num == 6) || (num == 2))
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rt_hw_serial_isr(&uart0_device);
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break;
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/*1,2,3 not implemented now, do in future*/
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case INTSRC_UART1:
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break;
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case INTSRC_UART2:
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break;
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case INTSRC_UART3:
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break;
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}
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}
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/*
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* This function will init timer2 for system ticks
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*/
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#define BUS4_FREQ 320000000UL
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#define TIMER_CLK BUS4_FREQ
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#define HZ 100
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void rt_hw_timer_init(void)
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{
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*(RP)SEP6200_TIMER_T2LCR = (TIMER_CLK + HZ / 2) / HZ;
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*(RP)SEP6200_TIMER_T2CR = 0x6;
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rt_hw_interrupt_install(INTSRC_TIMER1, rt_timer_handler, RT_NULL, "timer");
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rt_hw_interrupt_umask(INTSRC_TIMER1);
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/* start the timer */
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*(RP)SEP6200_TIMER_T2CR |= 0x1;
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}
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/*
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* This function will init uart
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*/
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#define UART_CLK 60000000UL
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void rt_hw_uart_init(void)
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{
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const rt_uint32_t uartclk = UART_CLK;
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*(RP)(SEP6200_UART0_LCR) = 0x83;
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*(RP)(SEP6200_UART0_DLBH) = (uartclk/16/115200) >> 8;
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*(RP)(SEP6200_UART0_DLBL) = (uartclk/16/115200) & 0xff;
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*(RP)(SEP6200_UART0_LCR) = 0x83 & (~(0x1 << 7));
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*(RP)(SEP6200_UART0_FCR) = 0x0;
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*(RP)(SEP6200_UART0_MCR) = 0x0;
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*(RP)(SEP6200_UART0_IER) = 0x0;
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/* Enable rx interrupt*/
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*(RP)(SEP6200_UART0_IER) |= 0x1;
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/* Disable tx interrupt*/
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*(RP)(SEP6200_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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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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int i = 0;
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rt_hw_uart_init();
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rt_hw_timer_init();
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}
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/*
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* Write one char to serial, must not trigger interrupt
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*/
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void rt_hw_serial_putc(const char c)
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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)SEP6200_UART0_LSR) & 0x40));
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*(RP)(SEP6200_UART0_TXFIFO) = 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^M
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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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rt_hw_serial_putc(*str++);
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}
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}
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/*@}*/
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