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First version of STR75x RIDE port and demo.
This commit is contained in:
Richard Barry
parent
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commit
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226
Demo/ARM7_STR75x_GCC/serial/serial.c
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226
Demo/ARM7_STR75x_GCC/serial/serial.c
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/*
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FreeRTOS.org V4.1.2 - Copyright (C) 2003-2006 Richard Barry.
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This file is part of the FreeRTOS.org distribution.
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FreeRTOS.org 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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FreeRTOS.org 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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You should have received a copy of the GNU General Public License
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along with FreeRTOS.org; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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A special exception to the GPL can be applied should you wish to distribute
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a combined work that includes FreeRTOS.org, without being obliged to provide
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the source code for any proprietary components. See the licensing section
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of http://www.FreeRTOS.org for full details of how and when the exception
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can be applied.
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***************************************************************************
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See http://www.FreeRTOS.org for documentation, latest information, license
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and contact details. Please ensure to read the configuration and relevant
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port sections of the online documentation.
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***************************************************************************
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*/
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/*
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BASIC INTERRUPT DRIVEN SERIAL PORT DRIVER FOR UART0.
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*/
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/* Library includes. */
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#include "75x_uart.h"
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#include "75x_gpio.h"
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#include "75x_eic.h"
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#include "75x_mrcc.h"
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/* Scheduler includes. */
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#include "FreeRTOS.h"
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#include "queue.h"
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/* Demo application includes. */
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#include "serial.h"
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#define serINVALID_QUEUE ( ( xQueueHandle ) 0 )
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#define serNO_BLOCK ( ( portTickType ) 0 )
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/*-----------------------------------------------------------*/
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/* Queues used to hold received characters, and characters waiting to be
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transmitted. */
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static xQueueHandle xRxedChars;
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static xQueueHandle xCharsForTx;
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static volatile portBASE_TYPE xQueueEmpty = pdTRUE;
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/*-----------------------------------------------------------*/
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/* The interrupt service routine - called from the assembly entry point. */
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void vSerialISR( void );
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void vConfigureQueues( xQueueHandle xQForRx, xQueueHandle xQForTx, volatile portBASE_TYPE *pxEmptyFlag );
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/*-----------------------------------------------------------*/
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/*
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* See the serial2.h header file.
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*/
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xComPortHandle xSerialPortInitMinimal( unsigned portLONG ulWantedBaud, unsigned portBASE_TYPE uxQueueLength )
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{
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xComPortHandle xReturn;
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UART_InitTypeDef UART_InitStructure;
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GPIO_InitTypeDef GPIO_InitStructure;
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EIC_IRQInitTypeDef EIC_IRQInitStructure;
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/* Create the queues used to hold Rx and Tx characters. */
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xRxedChars = xQueueCreate( uxQueueLength, ( unsigned portBASE_TYPE ) sizeof( signed portCHAR ) );
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xCharsForTx = xQueueCreate( uxQueueLength + 1, ( unsigned portBASE_TYPE ) sizeof( signed portCHAR ) );
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/* If the queues were created correctly then setup the serial port
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hardware. */
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if( ( xRxedChars != serINVALID_QUEUE ) && ( xCharsForTx != serINVALID_QUEUE ) )
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{
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vConfigureQueues( xRxedChars, xCharsForTx, &xQueueEmpty );
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portENTER_CRITICAL();
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{
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/* Enable the UART0 Clock. */
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MRCC_PeripheralClockConfig( MRCC_Peripheral_UART0, ENABLE );
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/* Configure the UART0_Tx as alternate function */
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
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GPIO_Init(GPIO0, &GPIO_InitStructure);
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/* Configure the UART0_Rx as input floating */
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
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GPIO_Init(GPIO0, &GPIO_InitStructure);
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/* Configure UART0. */
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UART_InitStructure.UART_WordLength = UART_WordLength_8D;
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UART_InitStructure.UART_StopBits = UART_StopBits_1;
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UART_InitStructure.UART_Parity = UART_Parity_No;
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UART_InitStructure.UART_BaudRate = ulWantedBaud;
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UART_InitStructure.UART_HardwareFlowControl = UART_HardwareFlowControl_None;
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UART_InitStructure.UART_Mode = UART_Mode_Tx_Rx;
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UART_InitStructure.UART_TxFIFOLevel = UART_FIFOLevel_1_2; /* FIFO size 16 bytes, FIFO level 8 bytes */
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UART_InitStructure.UART_RxFIFOLevel = UART_FIFOLevel_1_2; /* FIFO size 16 bytes, FIFO level 8 bytes */
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UART_Init(UART0, &UART_InitStructure);
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/* Enable the UART0 */
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UART_Cmd(UART0, ENABLE);
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/* Configure the IEC for the UART interrupts. */
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EIC_IRQInitStructure.EIC_IRQChannelCmd = ENABLE;
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EIC_IRQInitStructure.EIC_IRQChannel = UART0_IRQChannel;
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EIC_IRQInitStructure.EIC_IRQChannelPriority = 1;
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EIC_IRQInit(&EIC_IRQInitStructure);
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xQueueEmpty = pdTRUE;
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UART_ITConfig( UART0, UART_IT_Transmit | UART_IT_Receive, ENABLE );
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}
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portEXIT_CRITICAL();
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}
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else
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{
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xReturn = ( xComPortHandle ) 0;
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}
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/* This demo file only supports a single port but we have to return
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something to comply with the standard demo header file. */
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return xReturn;
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}
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/*-----------------------------------------------------------*/
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signed portBASE_TYPE xSerialGetChar( xComPortHandle pxPort, signed portCHAR *pcRxedChar, portTickType xBlockTime )
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{
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/* The port handle is not required as this driver only supports one port. */
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( void ) pxPort;
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/* Get the next character from the buffer. Return false if no characters
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are available, or arrive before xBlockTime expires. */
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if( xQueueReceive( xRxedChars, pcRxedChar, xBlockTime ) )
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{
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return pdTRUE;
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}
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else
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{
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return pdFALSE;
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}
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}
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/*-----------------------------------------------------------*/
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void vSerialPutString( xComPortHandle pxPort, const signed portCHAR * const pcString, unsigned portSHORT usStringLength )
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{
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signed portCHAR *pxNext;
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/* A couple of parameters that this port does not use. */
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( void ) usStringLength;
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( void ) pxPort;
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/* NOTE: This implementation does not handle the queue being full as no
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block time is used! */
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/* The port handle is not required as this driver only supports UART0. */
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( void ) pxPort;
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/* Send each character in the string, one at a time. */
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pxNext = ( signed portCHAR * ) pcString;
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while( *pxNext )
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{
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xSerialPutChar( pxPort, *pxNext, serNO_BLOCK );
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pxNext++;
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}
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}
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/*-----------------------------------------------------------*/
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signed portBASE_TYPE xSerialPutChar( xComPortHandle pxPort, signed portCHAR cOutChar, portTickType xBlockTime )
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{
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portBASE_TYPE xReturn;
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/* Place the character in the queue of characters to be transmitted. */
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portENTER_CRITICAL();
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{
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if( xQueueEmpty == pdTRUE )
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{
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UART0->DR = cOutChar;
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xReturn = pdPASS;
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}
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else
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{
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if( xQueueSend( xCharsForTx, &cOutChar, xBlockTime ) != pdPASS )
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{
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xReturn = pdFAIL;
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}
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else
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{
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xReturn = pdPASS;
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}
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}
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xQueueEmpty = pdFALSE;
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}
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portEXIT_CRITICAL();
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return xReturn;
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}
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/*-----------------------------------------------------------*/
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void vSerialClose( xComPortHandle xPort )
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{
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/* Not supported as not required by the demo application. */
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}
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/*-----------------------------------------------------------*/
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93
Demo/ARM7_STR75x_GCC/serial/serialISR.c
Normal file
93
Demo/ARM7_STR75x_GCC/serial/serialISR.c
Normal file
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@ -0,0 +1,93 @@
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/*
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FreeRTOS.org V4.1.2 - Copyright (C) 2003-2006 Richard Barry.
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This file is part of the FreeRTOS.org distribution.
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FreeRTOS.org 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
|
||||
(at your option) any later version.
|
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|
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FreeRTOS.org is distributed in the hope that it will be useful,
|
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but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
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||||
You should have received a copy of the GNU General Public License
|
||||
along with FreeRTOS.org; if not, write to the Free Software
|
||||
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
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A special exception to the GPL can be applied should you wish to distribute
|
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a combined work that includes FreeRTOS.org, without being obliged to provide
|
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the source code for any proprietary components. See the licensing section
|
||||
of http://www.FreeRTOS.org for full details of how and when the exception
|
||||
can be applied.
|
||||
|
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***************************************************************************
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See http://www.FreeRTOS.org for documentation, latest information, license
|
||||
and contact details. Please ensure to read the configuration and relevant
|
||||
port sections of the online documentation.
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***************************************************************************
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*/
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/* Library includes. */
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#include "75x_uart.h"
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/* Scheduler includes. */
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#include "FreeRTOS.h"
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#include "queue.h"
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static xQueueHandle xRxedChars;
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static xQueueHandle xCharsForTx;
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static portBASE_TYPE volatile *pxQueueEmpty;
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void vConfigureQueues( xQueueHandle xQForRx, xQueueHandle xQForTx, portBASE_TYPE volatile *pxEmptyFlag )
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{
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xRxedChars = xQForRx;
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xCharsForTx = xQForTx;
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pxQueueEmpty = pxEmptyFlag;
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}
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/*-----------------------------------------------------------*/
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void vSerialISR( void )
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{
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signed portCHAR cChar;
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portBASE_TYPE xTaskWokenByTx = pdFALSE, xTaskWokenByPost = pdFALSE;
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do
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{
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if( UART0->MIS & UART_IT_Transmit )
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{
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/* The interrupt was caused by the THR becoming empty. Are there any
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more characters to transmit? */
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if( xQueueReceiveFromISR( xCharsForTx, &cChar, &xTaskWokenByTx ) == pdTRUE )
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{
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/* A character was retrieved from the queue so can be sent to the
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THR now. */
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UART0->DR = cChar;
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}
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else
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{
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*pxQueueEmpty = pdTRUE;
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}
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UART_ClearITPendingBit( UART0, UART_IT_Transmit );
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}
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if( UART0->MIS & UART_IT_Receive )
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{
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/* The interrupt was caused by a character being received. Grab the
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character from the RHR and place it in the queue of received
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characters. */
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cChar = UART0->DR;
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xTaskWokenByPost = xQueueSendFromISR( xRxedChars, &cChar, xTaskWokenByPost );
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UART_ClearITPendingBit( UART0, UART_IT_Receive );
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}
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} while( UART0->MIS );
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/* If a task was woken by either a character being received or a character
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being transmitted then we may need to switch to another task. */
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portEND_SWITCHING_ISR( ( xTaskWokenByPost || xTaskWokenByTx ) );
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}
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