/* * 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 <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 ; RT_UNUSED char 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++); } }