| /* | |
| FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd. | |
| *************************************************************************** | |
| * * | |
| * FreeRTOS tutorial books are available in pdf and paperback. * | |
| * Complete, revised, and edited pdf reference manuals are also * | |
| * available. * | |
| * * | |
| * Purchasing FreeRTOS documentation will not only help you, by * | |
| * ensuring you get running as quickly as possible and with an * | |
| * in-depth knowledge of how to use FreeRTOS, it will also help * | |
| * the FreeRTOS project to continue with its mission of providing * | |
| * professional grade, cross platform, de facto standard solutions * | |
| * for microcontrollers - completely free of charge! * | |
| * * | |
| * >>> See http://www.FreeRTOS.org/Documentation for details. <<< * | |
| * * | |
| * Thank you for using FreeRTOS, and thank you for your support! * | |
| * * | |
| *************************************************************************** | |
| This file is part of the FreeRTOS distribution. | |
| FreeRTOS is free software; you can redistribute it and/or modify it under | |
| the terms of the GNU General Public License (version 2) as published by the | |
| Free Software Foundation AND MODIFIED BY the FreeRTOS exception. | |
| >>>NOTE<<< The modification to the GPL is included to allow you to | |
| distribute a combined work that includes FreeRTOS without being obliged to | |
| provide the source code for proprietary components outside of the FreeRTOS | |
| kernel. FreeRTOS is distributed in the hope that it will be useful, 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. You should have received a copy of the GNU General Public | |
| License and the FreeRTOS license exception along with FreeRTOS; if not it | |
| can be viewed here: http://www.freertos.org/a00114.html and also obtained | |
| by writing to Richard Barry, contact details for whom are available on the | |
| FreeRTOS WEB site. | |
| 1 tab == 4 spaces! | |
| *************************************************************************** | |
| * * | |
| * Having a problem? Start by reading the FAQ "My application does * | |
| * not run, what could be wrong? * | |
| * * | |
| * http://www.FreeRTOS.org/FAQHelp.html * | |
| * * | |
| *************************************************************************** | |
| http://www.FreeRTOS.org - Documentation, training, latest information, | |
| license and contact details. | |
| http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products, | |
| including FreeRTOS+Trace - an indispensable productivity tool. | |
| Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell | |
| the code with commercial support, indemnification, and middleware, under | |
| the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also | |
| provide a safety engineered and independently SIL3 certified version under | |
| the SafeRTOS brand: http://www.SafeRTOS.com. | |
| */ | |
| /* | |
| BASIC INTERRUPT DRIVEN SERIAL PORT DRIVER FOR UART0. | |
| */ | |
| /*----------------------------------------------------------- | |
| * Components that can be compiled to either ARM or THUMB mode are | |
| * contained in this file.c The ISR routines, which can only be compiled | |
| * to ARM mode, are contained in serialISR.c. | |
| *----------------------------------------------------------*/ | |
| /* Library includes. */ | |
| #include "75x_uart.h" | |
| #include "75x_gpio.h" | |
| #include "75x_eic.h" | |
| #include "75x_mrcc.h" | |
| /* Scheduler includes. */ | |
| #include "FreeRTOS.h" | |
| #include "queue.h" | |
| /* Demo application includes. */ | |
| #include "serial.h" | |
| #define serINVALID_QUEUE ( ( xQueueHandle ) 0 ) | |
| #define serNO_BLOCK ( ( portTickType ) 0 ) | |
| /*-----------------------------------------------------------*/ | |
| /* Queues used to hold received characters, and characters waiting to be | |
| transmitted. */ | |
| static xQueueHandle xRxedChars; | |
| static xQueueHandle xCharsForTx; | |
| static volatile portBASE_TYPE xQueueEmpty = pdTRUE; | |
| /*-----------------------------------------------------------*/ | |
| /* The interrupt service routine - called from the assembly entry point. */ | |
| void vSerialISR( void ); | |
| void vConfigureQueues( xQueueHandle xQForRx, xQueueHandle xQForTx, volatile portBASE_TYPE *pxEmptyFlag ); | |
| /*-----------------------------------------------------------*/ | |
| /* | |
| * See the serial2.h header file. | |
| */ | |
| xComPortHandle xSerialPortInitMinimal( unsigned long ulWantedBaud, unsigned portBASE_TYPE uxQueueLength ) | |
| { | |
| xComPortHandle xReturn; | |
| UART_InitTypeDef UART_InitStructure; | |
| GPIO_InitTypeDef GPIO_InitStructure; | |
| EIC_IRQInitTypeDef EIC_IRQInitStructure; | |
| /* Create the queues used to hold Rx and Tx characters. */ | |
| xRxedChars = xQueueCreate( uxQueueLength, ( unsigned portBASE_TYPE ) sizeof( signed char ) ); | |
| xCharsForTx = xQueueCreate( uxQueueLength + 1, ( unsigned portBASE_TYPE ) sizeof( signed char ) ); | |
| /* If the queues were created correctly then setup the serial port | |
| hardware. */ | |
| if( ( xRxedChars != serINVALID_QUEUE ) && ( xCharsForTx != serINVALID_QUEUE ) ) | |
| { | |
| vConfigureQueues( xRxedChars, xCharsForTx, &xQueueEmpty ); | |
| portENTER_CRITICAL(); | |
| { | |
| /* Enable the UART0 Clock. */ | |
| MRCC_PeripheralClockConfig( MRCC_Peripheral_UART0, ENABLE ); | |
| /* Configure the UART0_Tx as alternate function */ | |
| GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; | |
| GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; | |
| GPIO_Init(GPIO0, &GPIO_InitStructure); | |
| /* Configure the UART0_Rx as input floating */ | |
| GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; | |
| GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; | |
| GPIO_Init(GPIO0, &GPIO_InitStructure); | |
| /* Configure UART0. */ | |
| UART_InitStructure.UART_WordLength = UART_WordLength_8D; | |
| UART_InitStructure.UART_StopBits = UART_StopBits_1; | |
| UART_InitStructure.UART_Parity = UART_Parity_No; | |
| UART_InitStructure.UART_BaudRate = ulWantedBaud; | |
| UART_InitStructure.UART_HardwareFlowControl = UART_HardwareFlowControl_None; | |
| UART_InitStructure.UART_Mode = UART_Mode_Tx_Rx; | |
| UART_InitStructure.UART_TxFIFOLevel = UART_FIFOLevel_1_2; /* FIFO size 16 bytes, FIFO level 8 bytes */ | |
| UART_InitStructure.UART_RxFIFOLevel = UART_FIFOLevel_1_2; /* FIFO size 16 bytes, FIFO level 8 bytes */ | |
| UART_Init(UART0, &UART_InitStructure); | |
| /* Enable the UART0 */ | |
| UART_Cmd(UART0, ENABLE); | |
| /* Configure the IEC for the UART interrupts. */ | |
| EIC_IRQInitStructure.EIC_IRQChannelCmd = ENABLE; | |
| EIC_IRQInitStructure.EIC_IRQChannel = UART0_IRQChannel; | |
| EIC_IRQInitStructure.EIC_IRQChannelPriority = 1; | |
| EIC_IRQInit(&EIC_IRQInitStructure); | |
| xQueueEmpty = pdTRUE; | |
| UART_ITConfig( UART0, UART_IT_Transmit | UART_IT_Receive, ENABLE ); | |
| } | |
| portEXIT_CRITICAL(); | |
| } | |
| else | |
| { | |
| xReturn = ( xComPortHandle ) 0; | |
| } | |
| /* This demo file only supports a single port but we have to return | |
| something to comply with the standard demo header file. */ | |
| return xReturn; | |
| } | |
| /*-----------------------------------------------------------*/ | |
| signed portBASE_TYPE xSerialGetChar( xComPortHandle pxPort, signed char *pcRxedChar, portTickType xBlockTime ) | |
| { | |
| /* The port handle is not required as this driver only supports one port. */ | |
| ( void ) pxPort; | |
| /* Get the next character from the buffer. Return false if no characters | |
| are available, or arrive before xBlockTime expires. */ | |
| if( xQueueReceive( xRxedChars, pcRxedChar, xBlockTime ) ) | |
| { | |
| return pdTRUE; | |
| } | |
| else | |
| { | |
| return pdFALSE; | |
| } | |
| } | |
| /*-----------------------------------------------------------*/ | |
| void vSerialPutString( xComPortHandle pxPort, const signed char * const pcString, unsigned short usStringLength ) | |
| { | |
| signed char *pxNext; | |
| /* A couple of parameters that this port does not use. */ | |
| ( void ) usStringLength; | |
| ( void ) pxPort; | |
| /* NOTE: This implementation does not handle the queue being full as no | |
| block time is used! */ | |
| /* The port handle is not required as this driver only supports UART0. */ | |
| ( void ) pxPort; | |
| /* Send each character in the string, one at a time. */ | |
| pxNext = ( signed char * ) pcString; | |
| while( *pxNext ) | |
| { | |
| xSerialPutChar( pxPort, *pxNext, serNO_BLOCK ); | |
| pxNext++; | |
| } | |
| } | |
| /*-----------------------------------------------------------*/ | |
| signed portBASE_TYPE xSerialPutChar( xComPortHandle pxPort, signed char cOutChar, portTickType xBlockTime ) | |
| { | |
| portBASE_TYPE xReturn; | |
| /* Place the character in the queue of characters to be transmitted. */ | |
| portENTER_CRITICAL(); | |
| { | |
| if( xQueueEmpty == pdTRUE ) | |
| { | |
| UART0->DR = cOutChar; | |
| xReturn = pdPASS; | |
| } | |
| else | |
| { | |
| if( xQueueSend( xCharsForTx, &cOutChar, xBlockTime ) != pdPASS ) | |
| { | |
| xReturn = pdFAIL; | |
| } | |
| else | |
| { | |
| xReturn = pdPASS; | |
| } | |
| } | |
| xQueueEmpty = pdFALSE; | |
| } | |
| portEXIT_CRITICAL(); | |
| return xReturn; | |
| } | |
| /*-----------------------------------------------------------*/ | |
| void vSerialClose( xComPortHandle xPort ) | |
| { | |
| /* Not supported as not required by the demo application. */ | |
| } | |
| /*-----------------------------------------------------------*/ | |