293 lines
6.4 KiB
C
293 lines
6.4 KiB
C
/*
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* This file is part of FH8620 BSP for RT-Thread distribution.
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*
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* Copyright (c) 2016 Shanghai Fullhan Microelectronics Co., Ltd.
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* All rights reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Visit http://www.fullhan.com to get contact with Fullhan.
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*
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* Change Logs:
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* Date Author Notes
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*/
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#include <board.h>
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#include <rtdevice.h>
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#include "fh_arch.h"
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#include "libraries/inc/fh_uart.h"
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void rt_fh_uart_handler(int vector, void *param)
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{
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int status;
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unsigned int ret;
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struct fh_uart *uart;
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unsigned int reg_status;
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rt_device_t dev = (rt_device_t)param;
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uart = (struct fh_uart *)dev->user_data;
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status = uart_get_iir_status(uart->uart_port);
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if (status & UART_IIR_NOINT)
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{
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return;
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}
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if(status & UART_IIR_THREMPTY){
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//first close tx isr
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uart_disable_irq(uart->uart_port,UART_IER_ETBEI);
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rt_hw_serial_isr((struct rt_serial_device *)dev, RT_SERIAL_EVENT_TX_DONE);
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}
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else if((status & UART_IIR_CHRTOUT)==UART_IIR_CHRTOUT){
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//bug....
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//if no data in rx fifo
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reg_status = uart_get_status(uart->uart_port);
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if((reg_status & 1<<3) == 0)
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ret = uart_getc(uart->uart_port);
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}
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else{
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rt_interrupt_enter();
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rt_hw_serial_isr((struct rt_serial_device *)dev, RT_SERIAL_EVENT_RX_IND);
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rt_interrupt_leave();
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}
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}
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/**
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* UART device in RT-Thread
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*/
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static rt_err_t fh_uart_configure(struct rt_serial_device *serial,
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struct serial_configure *cfg)
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{
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int div;
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enum data_bits data_mode;
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enum stop_bits stop_mode;
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enum parity parity_mode;
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struct fh_uart *uart;
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RT_ASSERT(serial != RT_NULL);
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RT_ASSERT(cfg != RT_NULL);
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uart = (struct fh_uart *)serial->parent.user_data;
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switch (cfg->data_bits)
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{
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case DATA_BITS_8:
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data_mode = UART_DATA_BIT8;
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break;
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case DATA_BITS_7:
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data_mode = UART_DATA_BIT7;
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break;
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case DATA_BITS_6:
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data_mode = UART_DATA_BIT6;
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break;
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case DATA_BITS_5:
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data_mode = UART_DATA_BIT5;
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break;
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default:
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data_mode = UART_DATA_BIT8;
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break;
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}
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switch (cfg->stop_bits)
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{
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case STOP_BITS_2:
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stop_mode = UART_STOP_BIT2;
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break;
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case STOP_BITS_1:
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default:
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stop_mode = UART_STOP_BIT1;
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break;
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}
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switch (cfg->parity)
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{
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case PARITY_ODD:
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parity_mode = UART_PARITY_ODD;
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break;
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case PARITY_EVEN:
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parity_mode = UART_PARITY_EVEN;
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break;
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case PARITY_NONE:
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default:
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parity_mode = UART_PARITY_NONE;
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break;
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}
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uart_disable_irq(uart->uart_port, UART_IER_ERBFI);
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uart_configure(uart->uart_port, data_mode,
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stop_mode, parity_mode,
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cfg->baud_rate, UART_CLOCK_FREQ);
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uart_enable_irq(uart->uart_port, UART_IER_ERBFI);
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return RT_EOK;
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}
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static rt_err_t fh_uart_control(struct rt_serial_device *serial,
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int cmd, void *arg)
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{
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struct fh_uart* uart;
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RT_ASSERT(serial != RT_NULL);
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uart = (struct fh_uart *)serial->parent.user_data;
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switch (cmd)
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{
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case RT_DEVICE_CTRL_CLR_INT:
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/* disable rx irq */
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rt_hw_interrupt_mask(uart->irq);
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uart_disable_irq(uart->uart_port,UART_IER_ERBFI);
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break;
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case RT_DEVICE_CTRL_SET_INT:
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/* enable rx irq */
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rt_hw_interrupt_umask(uart->irq);
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uart_enable_irq(uart->uart_port,UART_IER_ERBFI);
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break;
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}
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return RT_EOK;
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}
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static int fh_uart_putc(struct rt_serial_device *serial, char c)
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{
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struct fh_uart *uart = serial->parent.user_data;
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unsigned int ret;
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ret = uart_get_status(uart->uart_port);
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if(serial->parent.open_flag & RT_DEVICE_FLAG_INT_TX){
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//RT_DEVICE_FLAG_INT_TX
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if(c == '\n'){
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fh_uart_putc(serial,'\r');
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}
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if(ret & UART_USR_TFNF){
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uart_putc(uart->uart_port, c);
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return 1;
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}
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//open tx isr here..
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uart_enable_irq(uart->uart_port,UART_IER_ETBEI);
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return -1;
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}
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//poll mode
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else{
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while(!(uart_get_status(uart->uart_port) & UART_USR_TFNF))
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;
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uart_putc(uart->uart_port, c);
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return 1;
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}
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}
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static int fh_uart_getc(struct rt_serial_device *serial)
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{
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int result;
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struct fh_uart *uart = serial->parent.user_data;
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if (uart_is_rx_ready(uart->uart_port))
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{
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result = uart_getc(uart->uart_port);
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}
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else
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{
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result = -1;
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}
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return result;
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}
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static const struct rt_uart_ops fh_uart_ops =
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{
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fh_uart_configure,
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fh_uart_control,
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fh_uart_putc,
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fh_uart_getc,
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};
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#if defined(RT_USING_UART0)
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static struct rt_serial_device serial0;
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struct fh_uart uart0 = {
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(uart *)UART0_REG_BASE,
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UART0_IRQn
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};
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#endif
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#if defined(RT_USING_UART1)
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static struct rt_serial_device serial1;
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struct fh_uart uart1 = {
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(uart *)UART1_REG_BASE,
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UART1_IRQn
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};
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#endif
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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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struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
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#if defined(RT_USING_UART0)
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#if(0)
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serial0.ops = &fh_uart_ops;
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serial0.config = config;
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/* register vcom device */
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rt_hw_serial_register(&serial0, "uart0",
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RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM | RT_DEVICE_FLAG_INT_TX | RT_DEVICE_FLAG_STANDALONE,
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&uart0);
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rt_hw_interrupt_install(uart0.irq, rt_fh_uart_handler,
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(void *)&(serial0.parent), "UART0");
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rt_hw_interrupt_umask(uart0.irq);
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#endif
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serial0.ops = &fh_uart_ops;
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serial0.config = config;
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/* register vcom device */
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rt_hw_serial_register(&serial0, "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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rt_hw_interrupt_install(uart0.irq, rt_fh_uart_handler,
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(void *)&(serial0.parent), "UART0");
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rt_hw_interrupt_umask(uart0.irq);
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#endif
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#if defined(RT_USING_UART1)
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serial1.ops = &fh_uart_ops;
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serial1.config = config;
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/* register vcom device */
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rt_hw_serial_register(&serial1, "uart1",
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RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM ,
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&uart1);
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rt_hw_interrupt_install(uart1.irq, rt_fh_uart_handler,
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(void *)&(serial1.parent), "UART1");
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rt_hw_interrupt_umask(uart1.irq);
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#endif
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}
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