| /* | |
| FreeRTOS V8.2.2 - Copyright (C) 2015 Real Time Engineers Ltd. | |
| All rights reserved | |
| VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION. | |
| 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. Full license text is available on the following | |
| link: http://www.freertos.org/a00114.html | |
| *************************************************************************** | |
| * * | |
| * FreeRTOS provides completely free yet professionally developed, * | |
| * robust, strictly quality controlled, supported, and cross * | |
| * platform software that is more than just the market leader, it * | |
| * is the industry's de facto standard. * | |
| * * | |
| * Help yourself get started quickly while simultaneously helping * | |
| * to support the FreeRTOS project by purchasing a FreeRTOS * | |
| * tutorial book, reference manual, or both: * | |
| * http://www.FreeRTOS.org/Documentation * | |
| * * | |
| *************************************************************************** | |
| http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading | |
| the FAQ page "My application does not run, what could be wrong?". Have you | |
| defined configASSERT()? | |
| http://www.FreeRTOS.org/support - In return for receiving this top quality | |
| embedded software for free we request you assist our global community by | |
| participating in the support forum. | |
| http://www.FreeRTOS.org/training - Investing in training allows your team to | |
| be as productive as possible as early as possible. Now you can receive | |
| FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers | |
| Ltd, and the world's leading authority on the world's leading RTOS. | |
| http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products, | |
| including FreeRTOS+Trace - an indispensable productivity tool, a DOS | |
| compatible FAT file system, and our tiny thread aware UDP/IP stack. | |
| http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate. | |
| Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS. | |
| http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High | |
| Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS | |
| licenses offer ticketed support, indemnification and commercial middleware. | |
| http://www.SafeRTOS.com - High Integrity Systems also provide a safety | |
| engineered and independently SIL3 certified version for use in safety and | |
| mission critical applications that require provable dependability. | |
| 1 tab == 4 spaces! | |
| */ | |
| #include <device.h> | |
| #include "FreeRTOS.h" | |
| #include "queue.h" | |
| #include "task.h" | |
| #include "serial.h" | |
| /*---------------------------------------------------------------------------*/ | |
| #define serialSTRING_DELAY_TICKS ( portMAX_DELAY ) | |
| /*---------------------------------------------------------------------------*/ | |
| CY_ISR_PROTO( vUartRxISR ); | |
| CY_ISR_PROTO( vUartTxISR ); | |
| /*---------------------------------------------------------------------------*/ | |
| static QueueHandle_t xSerialTxQueue = NULL; | |
| static QueueHandle_t xSerialRxQueue = NULL; | |
| /*---------------------------------------------------------------------------*/ | |
| xComPortHandle xSerialPortInitMinimal( unsigned long ulWantedBaud, unsigned portBASE_TYPE uxQueueLength ) | |
| { | |
| /* Configure Rx. */ | |
| xSerialRxQueue = xQueueCreate( uxQueueLength, sizeof( signed char ) ); | |
| isr_UART1_RX_BYTE_RECEIVED_ClearPending(); | |
| isr_UART1_RX_BYTE_RECEIVED_StartEx(vUartRxISR); | |
| /* Configure Tx */ | |
| xSerialTxQueue = xQueueCreate( uxQueueLength, sizeof( signed char ) ); | |
| isr_UART1_TX_BYTE_COMPLETE_ClearPending() ; | |
| isr_UART1_TX_BYTE_COMPLETE_StartEx(vUartTxISR); | |
| /* Clear the interrupt modes for the Tx for the time being. */ | |
| UART_1_SetTxInterruptMode( 0 ); | |
| /* Both configured successfully. */ | |
| return ( xComPortHandle )( xSerialTxQueue && xSerialRxQueue ); | |
| } | |
| /*---------------------------------------------------------------------------*/ | |
| void vSerialPutString( xComPortHandle pxPort, const signed char * const pcString, unsigned short usStringLength ) | |
| { | |
| unsigned short usIndex = 0; | |
| for( usIndex = 0; usIndex < usStringLength; usIndex++ ) | |
| { | |
| /* Check for pre-mature end of line. */ | |
| if( '\0' == pcString[ usIndex ] ) | |
| { | |
| break; | |
| } | |
| /* Send out, one character at a time. */ | |
| if( pdTRUE != xSerialPutChar( NULL, pcString[ usIndex ], serialSTRING_DELAY_TICKS ) ) | |
| { | |
| /* Failed to send, this will be picked up in the receive comtest task. */ | |
| } | |
| } | |
| } | |
| /*---------------------------------------------------------------------------*/ | |
| signed portBASE_TYPE xSerialGetChar( xComPortHandle pxPort, signed char *pcRxedChar, TickType_t xBlockTime ) | |
| { | |
| portBASE_TYPE xReturn = pdFALSE; | |
| if( pdTRUE == xQueueReceive( xSerialRxQueue, pcRxedChar, xBlockTime ) ) | |
| { | |
| /* Picked up a character. */ | |
| xReturn = pdTRUE; | |
| } | |
| return xReturn; | |
| } | |
| /*---------------------------------------------------------------------------*/ | |
| signed portBASE_TYPE xSerialPutChar( xComPortHandle pxPort, signed char cOutChar, TickType_t xBlockTime ) | |
| { | |
| portBASE_TYPE xReturn = pdFALSE; | |
| /* The ISR is processing characters is so just add to the end of the queue. */ | |
| if( pdTRUE == xQueueSend( xSerialTxQueue, &cOutChar, xBlockTime ) ) | |
| { | |
| xReturn = pdTRUE; | |
| } | |
| else | |
| { | |
| /* The queue is probably full. */ | |
| xReturn = pdFALSE; | |
| } | |
| /* Make sure that the interrupt will fire in the case where: | |
| Currently sending so the Tx Complete will fire. | |
| Not sending so the Empty will fire. */ | |
| taskENTER_CRITICAL(); | |
| UART_1_SetTxInterruptMode( UART_1_TX_STS_COMPLETE | UART_1_TX_STS_FIFO_EMPTY ); | |
| taskEXIT_CRITICAL(); | |
| return xReturn; | |
| } | |
| /*---------------------------------------------------------------------------*/ | |
| CY_ISR(vUartRxISR) | |
| { | |
| portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE; | |
| volatile unsigned char ucStatus = 0; | |
| signed char cInChar = 0; | |
| unsigned long ulMask = 0; | |
| /* Read the status to acknowledge. */ | |
| ucStatus = UART_1_ReadRxStatus(); | |
| /* Only interested in a character being received. */ | |
| if( 0 != ( ucStatus & UART_1_RX_STS_FIFO_NOTEMPTY ) ) | |
| { | |
| /* Get the character. */ | |
| cInChar = UART_1_GetChar(); | |
| /* Mask off the other RTOS interrupts to interact with the queue. */ | |
| ulMask = portSET_INTERRUPT_MASK_FROM_ISR(); | |
| { | |
| /* Try to deliver the character. */ | |
| if( pdTRUE != xQueueSendFromISR( xSerialRxQueue, &cInChar, &xHigherPriorityTaskWoken ) ) | |
| { | |
| /* Run out of space. */ | |
| } | |
| } | |
| portCLEAR_INTERRUPT_MASK_FROM_ISR( ulMask ); | |
| } | |
| /* If we delivered the character then a context switch might be required. | |
| xHigherPriorityTaskWoken was set to pdFALSE on interrupt entry. If calling | |
| xQueueSendFromISR() caused a task to unblock, and the unblocked task has | |
| a priority equal to or higher than the currently running task (the task this | |
| ISR interrupted), then xHigherPriorityTaskWoken will have been set to pdTRUE and | |
| portEND_SWITCHING_ISR() will request a context switch to the newly unblocked | |
| task. */ | |
| portEND_SWITCHING_ISR( xHigherPriorityTaskWoken ); | |
| } | |
| /*---------------------------------------------------------------------------*/ | |
| CY_ISR(vUartTxISR) | |
| { | |
| portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE; | |
| volatile unsigned char ucStatus = 0; | |
| signed char cOutChar = 0; | |
| unsigned long ulMask = 0; | |
| /* Read the status to acknowledge. */ | |
| ucStatus = UART_1_ReadTxStatus(); | |
| /* Check to see whether this is a genuine interrupt. */ | |
| if( ( 0 != ( ucStatus & UART_1_TX_STS_COMPLETE ) ) || ( 0 != ( ucStatus & UART_1_TX_STS_FIFO_EMPTY ) ) ) | |
| { | |
| /* Mask off the other RTOS interrupts to interact with the queue. */ | |
| ulMask = portSET_INTERRUPT_MASK_FROM_ISR(); | |
| { | |
| if( pdTRUE == xQueueReceiveFromISR( xSerialTxQueue, &cOutChar, &xHigherPriorityTaskWoken ) ) | |
| { | |
| /* Send the next character. */ | |
| UART_1_PutChar( cOutChar ); | |
| /* If we are firing, then the only interrupt we are interested in | |
| is the Complete. The application code will add the Empty interrupt | |
| when there is something else to be done. */ | |
| UART_1_SetTxInterruptMode( UART_1_TX_STS_COMPLETE ); | |
| } | |
| else | |
| { | |
| /* There is no work left so disable the interrupt until the application | |
| puts more into the queue. */ | |
| UART_1_SetTxInterruptMode( 0 ); | |
| } | |
| } | |
| portCLEAR_INTERRUPT_MASK_FROM_ISR( ulMask ); | |
| } | |
| /* If we delivered the character then a context switch might be required. | |
| xHigherPriorityTaskWoken was set to pdFALSE on interrupt entry. If calling | |
| xQueueSendFromISR() caused a task to unblock, and the unblocked task has | |
| a priority equal to or higher than the currently running task (the task this | |
| ISR interrupted), then xHigherPriorityTaskWoken will have been set to pdTRUE and | |
| portEND_SWITCHING_ISR() will request a context switch to the newly unblocked | |
| task. */ | |
| portEND_SWITCHING_ISR( xHigherPriorityTaskWoken ); | |
| } | |
| /*---------------------------------------------------------------------------*/ |