359 lines
8.1 KiB
C
359 lines
8.1 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 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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* 2010-05-02 Aozima update CMSIS to 130
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*/
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#include <rthw.h>
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#include <rtthread.h>
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#include "board.h"
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#include "LPC177x_8x.h"
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#include "lpc177x_8x_uart.h"
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#include "lpc177x_8x_pinsel.h"
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/**
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* @addtogroup LPC11xx
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*/
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/*@{*/
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struct rt_uart_lpc
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{
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struct rt_device parent;
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LPC_UART_TypeDef * UART;
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IRQn_Type UART_IRQn;
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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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};
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#ifdef RT_USING_UART0
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struct rt_uart_lpc uart0_device;
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#endif
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#ifdef RT_USING_UART1
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struct rt_uart_lpc uart1_device;
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#endif
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#ifdef RT_USING_UART0
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void UART0_IRQHandler(void)
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{
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rt_ubase_t level, iir;
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struct rt_uart_lpc* uart = &uart0_device;
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/* enter interrupt */
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rt_interrupt_enter();
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/* read IIR and clear it */
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iir = uart->UART->IIR;
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if (iir == UART_IIR_INTID_RDA) /* Receive Data Available */
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{
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/* Receive Data Available */
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uart->rx_buffer[uart->save_index] = uart->UART->RBR;
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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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/* leave interrupt */
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rt_interrupt_leave();
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return;
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}
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#endif
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#ifdef RT_USING_UART1
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void UART1_IRQHandler(void)
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{
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rt_ubase_t level, iir;
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struct rt_uart_lpc* uart = &uart1_device;
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/* enter interrupt */
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rt_interrupt_enter();
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/* read IIR and clear it */
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iir = uart->UART->IIR;
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if (iir == UART_IIR_INTID_RDA) /* Receive Data Available */
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{
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/* Receive Data Available */
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uart->rx_buffer[uart->save_index] = uart->UART->RBR;
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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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/* leave interrupt */
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rt_interrupt_leave();
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return;
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}
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#endif
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static rt_err_t rt_uart_init (rt_device_t dev)
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{
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struct rt_uart_lpc *uart = (struct rt_uart_lpc*)dev;
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UART_CFG_Type UART_ConfigStruct;
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#ifdef RT_USING_UART0
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if( uart->UART == LPC_UART0 )
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{
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/*
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* Initialize UART0 pin connect
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* P0.2: TXD
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* P0.3: RXD
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*/
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PINSEL_ConfigPin(0, 2, 1);
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PINSEL_ConfigPin(0, 3, 1);
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UART_ConfigStruct.Baud_rate = 115200;
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UART_ConfigStruct.Databits = UART_DATABIT_8;
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UART_ConfigStruct.Parity = UART_PARITY_NONE;
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UART_ConfigStruct.Stopbits = UART_STOPBIT_1;
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UART_Init( uart->UART, &UART_ConfigStruct);
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// Enable UART Transmit
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UART_TxCmd( uart->UART, ENABLE);
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UART_IntConfig( uart->UART, UART_INTCFG_RBR, ENABLE);
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}
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#endif
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#ifdef RT_USING_UART1
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if( ((LPC_UART1_TypeDef *)uart->UART) == LPC_UART1 )
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{
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/*
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* Initialize UART1 pin connect
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* P3.16: TXD
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* P3.17: RXD
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*/
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PINSEL_ConfigPin(3, 16, 3);
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PINSEL_ConfigPin(3, 17, 3);
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UART_ConfigStruct.Baud_rate = 115200;
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UART_ConfigStruct.Databits = UART_DATABIT_8;
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UART_ConfigStruct.Parity = UART_PARITY_NONE;
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UART_ConfigStruct.Stopbits = UART_STOPBIT_1;
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UART_Init( uart->UART,&UART_ConfigStruct);
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// Enable UART Transmit
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UART_TxCmd( uart->UART, ENABLE);
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UART_IntConfig( uart->UART, UART_INTCFG_RBR, ENABLE);
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}
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#endif
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#ifdef RT_USING_UART2
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if( uart->UART == LPC_UART2 )
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{
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}
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#endif
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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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struct rt_uart_lpc *uart = (struct rt_uart_lpc*)dev;
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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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NVIC_EnableIRQ( uart->UART_IRQn );
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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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struct rt_uart_lpc *uart = (struct rt_uart_lpc*)dev;
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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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NVIC_DisableIRQ( uart->UART_IRQn );
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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_lpc *uart = (struct rt_uart_lpc*)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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struct rt_uart_lpc *uart = (struct rt_uart_lpc*)dev;
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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 (!(uart->UART->LSR & UART_LSR_THRE));
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UART_SendByte( uart->UART,'\r');
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}
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while (!(uart->UART->LSR & UART_LSR_THRE));
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UART_SendByte( uart->UART,*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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UART_Send( uart->UART, (uint8_t *)buffer, size, BLOCKING);
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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_lpc* uart;
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#ifdef RT_USING_UART0
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/* get uart device */
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uart = &uart0_device;
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uart0_device.UART = LPC_UART0;
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uart0_device.UART_IRQn = UART0_IRQn;
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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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#endif
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#ifdef RT_USING_UART1
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/* get uart device */
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uart = &uart1_device;
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uart1_device.UART = (LPC_UART_TypeDef *)LPC_UART1;
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uart1_device.UART_IRQn = UART1_IRQn;
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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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"uart1", RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_STREAM | RT_DEVICE_FLAG_INT_RX);
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#endif
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}
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/*@}*/
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