248 lines
6.8 KiB
C
248 lines
6.8 KiB
C
/*
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* File : board.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2009 - 2012 RT-Thread Develop Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2010-03-08 Bernard The first version for LPC17xx
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* 2010-06-29 lgnq Modified for V850
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*/
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#include <rthw.h>
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#include <rtthread.h>
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#include "io70f3454.h"
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#include "uart.h"
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#if defined(RT_USING_UART0) && defined(RT_USING_DEVICE)
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struct rt_uart_v850
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{
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struct rt_device parent;
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/* buffer for reception */
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rt_uint8_t read_index, save_index;
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rt_uint8_t rx_buffer[RT_UART_RX_BUFFER_SIZE];
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}uart_device;
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void uarta1_receive_handler(void)
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{
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rt_ubase_t level;
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rt_uint8_t c;
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struct rt_uart_v850 *uart = &uart_device;
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// while(ri_u0c1 == 0)
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// ;
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c = (char) UA1RX;
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/* Receive Data Available */
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uart->rx_buffer[uart->save_index] = c;
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level = rt_hw_interrupt_disable();
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uart->save_index ++;
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if (uart->save_index >= RT_UART_RX_BUFFER_SIZE)
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uart->save_index = 0;
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rt_hw_interrupt_enable(level);
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/* invoke callback */
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if (uart->parent.rx_indicate != RT_NULL)
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{
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rt_size_t length;
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if (uart->read_index > uart->save_index)
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length = RT_UART_RX_BUFFER_SIZE - uart->read_index + uart->save_index;
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else
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length = uart->save_index - uart->read_index;
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uart->parent.rx_indicate(&uart->parent, length);
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}
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}
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static rt_err_t rt_uart_init (rt_device_t dev)
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{
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UA1TXE = 0U; /* disable UARTA1 transmission operation */
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UA1RXE = 0U; /* disable UARTA1 reception operation */
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UA1PWR = 0U; /* disable UARTA1 operation */
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UA1TMK = 1U; /* disable INTUA1T interrupt */
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UA1TIF = 0U; /* clear INTUA1T interrupt flag */
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UA1RMK = 1U; /* disable INTUA1R interrupt */
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UA1RIF = 0U; /* clear INTUA1R interrupt flag */
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/* Set INTUA1T level low priority */
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UA1TIC |= 0x07U;
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/* Set INTUA1R level low priority */
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UA1RIC |= 0x07U;
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//BAUDRATE = 9600
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UA1CTL1 = _03_UARTA_BASECLK_FXX_16;
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UA1CTL2 = _11_UARTA1_BASECLK_DIVISION;
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UA1CTL0 = _10_UARTA_TRANSFDIR_LSB | _00_UARTA_PARITY_NONE | _02_UARTA_DATALENGTH_8BIT | _00_UARTA_STOPLENGTH_1BIT;
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UA1OPT0 = _14_UARTA_UAnOPT0_INITIALVALUE | _00_UARTA_TRAN_DATALEVEL_NORMAL | _00_UARTA_REC_DATALEVEL_NORMAL;
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UA1PWR = 1U; /* enable UARTA1 operation */
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/* Set TXDA1 pin */
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/* Set RXDA1 pin */
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PFC3_bit.no0 = 0;
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PFCE3_bit.no0 = 0;
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PMC3_bit.no0 = 1;
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PFC3_bit.no1 = 0;
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PFCE3_bit.no1 = 0;
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PMC3_bit.no1 = 1;
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return RT_EOK;
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}
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static rt_err_t rt_uart_open(rt_device_t dev, rt_uint16_t oflag)
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{
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RT_ASSERT(dev != RT_NULL);
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if (dev->flag & RT_DEVICE_FLAG_INT_RX)
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{
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/* Enable the UART Interrupt */
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UA1TIF = 0U; /* clear INTUA1T interrupt flag */
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UA1TMK = 1U; /* disable INTUA1T interrupt */
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UA1RIF = 0U; /* clear INTUA1R interrupt flag */
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UA1RMK = 0U; /* enable INTUA1R interrupt */
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UA1TXE = 1U; /* enable UARTA1 transmission operation */
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UA1RXE = 1U; /* enable UARTA1 reception operation */
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}
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return RT_EOK;
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}
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static rt_err_t rt_uart_close(rt_device_t dev)
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{
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RT_ASSERT(dev != RT_NULL);
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if (dev->flag & RT_DEVICE_FLAG_INT_RX)
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{
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/* Disable the UART Interrupt */
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UA1TXE = 0U; /* disable UARTA1 transmission operation */
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UA1RXE = 0U; /* disable UARTA1 reception operation */
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UA1TMK = 1U; /* disable INTUA1T interrupt */
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UA1TIF = 0U; /* clear INTUA1T interrupt flag */
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UA1RMK = 1U; /* disable INTUA1R interrupt */
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UA1RIF = 0U; /* clear INTUA1R interrupt flag */
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}
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return RT_EOK;
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}
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static rt_size_t rt_uart_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size)
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{
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rt_uint8_t *ptr;
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struct rt_uart_v850 *uart = (struct rt_uart_v850 *)dev;
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RT_ASSERT(uart != RT_NULL);
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/* point to buffer */
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ptr = (rt_uint8_t *)buffer;
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if (dev->flag & RT_DEVICE_FLAG_INT_RX)
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{
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while (size)
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{
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/* interrupt receive */
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rt_base_t level;
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/* disable interrupt */
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level = rt_hw_interrupt_disable();
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if (uart->read_index != uart->save_index)
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{
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*ptr = uart->rx_buffer[uart->read_index];
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uart->read_index ++;
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if (uart->read_index >= RT_UART_RX_BUFFER_SIZE)
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uart->read_index = 0;
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}
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else
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{
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/* no data in rx buffer */
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/* enable interrupt */
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rt_hw_interrupt_enable(level);
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break;
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}
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/* enable interrupt */
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rt_hw_interrupt_enable(level);
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ptr ++;
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size --;
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}
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return (rt_uint32_t)ptr - (rt_uint32_t)buffer;
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}
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return 0;
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}
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static rt_size_t rt_uart_write(rt_device_t dev, rt_off_t pos, const void* buffer, rt_size_t size)
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{
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char *ptr;
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ptr = (char*)buffer;
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if (dev->flag & RT_DEVICE_FLAG_STREAM)
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{
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/* stream mode */
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while (size)
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{
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if (*ptr == '\n')
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{
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while (UA1TSF == 1U)
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;
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UA1TX = '\r';
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}
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/* THRE status, contain valid data */
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while (UA1TSF == 1U)
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;
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UA1TX = *ptr;
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ptr ++;
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size --;
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}
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}
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else
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{
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while (size != 0)
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{
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/* THRE status, contain valid data */
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while (UA1TSF == 1U)
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;
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UA1TX = *ptr;
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ptr ++;
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size --;
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}
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}
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return (rt_size_t)ptr - (rt_size_t)buffer;
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}
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void rt_hw_uart_init(void)
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{
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struct rt_uart_v850 *uart;
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/* get uart device */
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uart = &uart_device;
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/* device initialization */
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uart->parent.type = RT_Device_Class_Char;
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rt_memset(uart->rx_buffer, 0, sizeof(uart->rx_buffer));
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uart->read_index = uart->save_index = 0;
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/* device interface */
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uart->parent.init = rt_uart_init;
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uart->parent.open = rt_uart_open;
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uart->parent.close = rt_uart_close;
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uart->parent.read = rt_uart_read;
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uart->parent.write = rt_uart_write;
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uart->parent.control = RT_NULL;
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uart->parent.user_data = RT_NULL;
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rt_device_register(&uart->parent,
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"uart0", RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_STREAM | RT_DEVICE_FLAG_INT_RX);
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}
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#endif /* end of UART */
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/*@}*/
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