20885c64e8
git-svn-id: https://svn.vbchaos.nl/svn/hsb/trunk@419 05563f52-14a8-4384-a975-3d1654cca0fa
173 lines
5.8 KiB
C
173 lines
5.8 KiB
C
// -----------------------------------------------------------------------------
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/// @file uart.h
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/// @brief File description
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// -----------------------------------------------------------------------------
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// Micro-Key bv
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// Industrieweg 28, 9804 TG Noordhorn
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// Postbus 92, 9800 AB Zuidhorn
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// The Netherlands
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// Tel: +31 594 503020
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// Fax: +31 594 505825
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// Email: support@microkey.nl
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// Web: www.microkey.nl
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// -----------------------------------------------------------------------------
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/// $Revision$
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/// $Author$
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/// $Date$
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// (c) 2017 Micro-Key bv
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// -----------------------------------------------------------------------------
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/**
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* UART implementation
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* \defgroup UART Package UART
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* \ingroup Platform
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* @{
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*/
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#ifndef MISC_INC_UART_H_
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#define MISC_INC_UART_H_
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// -----------------------------------------------------------------------------
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// Include files
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// -----------------------------------------------------------------------------
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#include <stdbool.h>
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#include "FreeRTOS.h"
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#include "semphr.h"
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#include "platform.h"
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#include "IODevice.h"
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// -----------------------------------------------------------------------------
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// Constant and macro definitions
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// -----------------------------------------------------------------------------
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#define UART_DEF_BAUDRATE (9600)
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#define UART_DEF_WORDLENGTH (USART_WordLength_8b)
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#define UART_DEF_STOPBITS (USART_StopBits_1)
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#define UART_DEF_PARITY (USART_Parity_No)
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#define UART_DEF_MODE (USART_Mode_Tx | USART_Mode_Rx)
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#define UART_DEF_HW_FLOW_CONTROL (USART_HardwareFlowControl_None)
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#define UART_DEF_RX_QUEUE (32)
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#define UART_DEF_TX_QUEUE (32)
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// -----------------------------------------------------------------------------
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// Type definitions.
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// -----------------------------------------------------------------------------
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struct usartQueueItem
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{
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char byte;
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};
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struct UartParameters
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{
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uint32_t baudrate;
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uint16_t wordlength;
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uint16_t stopbits;
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uint16_t parity;
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uint16_t mode;
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uint16_t hwFlowControl;
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UBaseType_t txQueueSize;
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UBaseType_t rxQueueSize;
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};
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struct Uart
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{
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struct IODevice device;
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USART_TypeDef* USART_TypeDef;
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USART_InitTypeDef USART_InitStruct;
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USART_ClockInitTypeDef* USART_ClockInitStruct;
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T_PL_GPIO USART_RX;
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T_PL_GPIO USART_TX;
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T_PL_GPIO USART_CTS;
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T_PL_GPIO USART_RTS;
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SemaphoreHandle_t txSemaphore; //! Semaphore for transmit handler
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xQueueHandle txQueue; //! USART Transfer queue identifier
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xQueueHandle rxQueue; //! USART Receive queue identifier
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bool initialized;
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};
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// -----------------------------------------------------------------------------
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// Function declarations
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// -----------------------------------------------------------------------------
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/** ----------------------------------------------------------------------------
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* Uart_construct
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* Description of function
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*
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* @param _self The UART object to initialize
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* @param baudrate Baudrate to use
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* @param wordlength Wordlength for the UART
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* @param stopbits Number of stopbits to use
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* @param parity Parity of the UART
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* @param mode Mode (TX, RX, Both)
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* @param hwFlowControl Control of hardware flow control
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*
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* @return ErrorStatus SUCCESS if writing message was successful
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* ERROR otherwise
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*
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* @todo
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* -----------------------------------------------------------------------------
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*/
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extern ErrorStatus Uart_construct(struct Uart* self, struct UartParameters* parameters);
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/** ----------------------------------------------------------------------------
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* Uart_getDefaultParameters
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* Function that assigns default parameters to the uart struct
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*
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* @param parameters
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*
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* @return ErrorStatus
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*
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* @todo
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* -----------------------------------------------------------------------------
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*/
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extern ErrorStatus Uart_getDefaultParameters(struct UartParameters* parameters);
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/** ----------------------------------------------------------------------------
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* Uart_write
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* Writes length number of bytes from buffer to Uart object self
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*
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* @param self The UART class object
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* @param buffer Message string to send
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* @param length Message length
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*
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* @return ErrorStatus SUCCESS if writing message was successful
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* ERROR otherwise
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*
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* @todo
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* -----------------------------------------------------------------------------
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*/
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extern ErrorStatus Uart_write(struct Uart* self, const char* buffer, int length);
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/** ----------------------------------------------------------------------------
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* Uart_read
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* Reads length number of bytes from Uart object self into buffer. The actual
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* number of read bytes are put in actualLength. Ususally they should be equal
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* but in some cases less bytes are read than requested.
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*
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* @param self The UART class object
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* @param buffer Message string to send
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* @param length Message length
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* @param actualLength THe actual number of bytes read
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*
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* @return ErrorStatus SUCCESS if writing message was successful
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* ERROR otherwise
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*
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* @todo
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* -----------------------------------------------------------------------------
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*/
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extern ErrorStatus Uart_read(struct Uart* self, char* buffer, size_t length, size_t* actualLength);
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#endif /* MISC_INC_UART_H_ */
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/** @} */
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