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LibrePilot/flight/PiOS/Common/pios_com.c
gussy 8f3c2dbafb Changes to PiOS to be compatible with the AHRS.
Updates to AHRS code.

git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@615 ebee16cc-31ac-478f-84a7-5cbb03baadba
2010-05-11 13:36:13 +00:00

345 lines
9.1 KiB
C

/**
******************************************************************************
*
* @file pios_com.c
* @author The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
* Parts by Thorsten Klose (tk@midibox.org)
* @brief COM layer functions
* @see The GNU Public License (GPL) Version 3
* @defgroup PIOS_COM COM layer functions
* @{
*
*****************************************************************************/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* Project Includes */
#include "pios.h"
#if defined(PIOS_INCLUDE_COM)
/* Global Variables */
/* Local Variables */
static int32_t (*receive_callback_func)(COMPortTypeDef port, char c);
/**
* Initialises COM layer
* \param[in] mode currently only mode 0 supported
* \return < 0 if initialisation failed
*/
int32_t PIOS_COM_Init(void)
{
int32_t ret = 0;
/* Disable callback by default */
receive_callback_func = NULL;
/* If any COM assignment: */
#if defined(PIOS_INCLUDE_USART)
PIOS_USART_Init();
#endif
#if defined(PIOS_INCLUDE_USB_HID)
PIOS_USB_HID_Init(0);
#endif
return ret;
}
/**
* Change the port speed without re-initializing
* \param[in] port COM port
* \param[in] baud Requested baud rate
* \return -1 if port not available
* \return 0 on success
*/
int32_t PIOS_COM_ChangeBaud(COMPortTypeDef port, uint32_t baud)
{
/* Branch depending on selected port */
switch(port) {
#if defined(PIOS_INCLUDE_USART)
case COM_DEBUG_USART:
PIOS_USART_ChangeBaud(PIOS_COM_DEBUG_PORT, baud);
return 0;
case COM_USART1:
PIOS_USART_ChangeBaud(USART_1, baud);
return 0;
case COM_USART2:
PIOS_USART_ChangeBaud(USART_2, baud);
return 0;
case COM_USART3:
PIOS_USART_ChangeBaud(USART_3, baud);
return 0;
#endif
case COM_USB_HID:
return 0;
default:
/* Invalid port */
return -1;
}
}
/**
* Sends a package over given port
* \param[in] port COM port
* \param[in] buffer character buffer
* \param[in] len buffer length
* \return -1 if port not available
* \return -2 if non-blocking mode activated: buffer is full
* caller should retry until buffer is free again
* \return 0 on success
*/
int32_t PIOS_COM_SendBufferNonBlocking(COMPortTypeDef port, uint8_t *buffer, uint16_t len)
{
/* Branch depending on selected port */
switch(port) {
#if defined(PIOS_INCLUDE_USART)
case COM_DEBUG_USART:
return PIOS_USART_TxBufferPutMoreNonBlocking(PIOS_COM_DEBUG_PORT, buffer, len);
#endif
#if PIOS_USART1_ENABLED
case COM_USART1:
return PIOS_USART_TxBufferPutMoreNonBlocking(USART_1, buffer, len);
#endif
#if PIOS_USART2_ENABLED
case COM_USART2:
return PIOS_USART_TxBufferPutMoreNonBlocking(USART_2, buffer, len);
#endif
#if PIOS_USART3_ENABLED
case COM_USART3:
return PIOS_USART_TxBufferPutMoreNonBlocking(USART_3, buffer, len);
#endif
#if defined(PIOS_INCLUDE_USB_HID)
case COM_USB_HID:
return PIOS_USB_HID_TxBufferPutMoreNonBlocking(buffer, len);
#endif
default:
/* Invalid port */
return -1;
}
}
/**
* Sends a package over given port
* (blocking function)
* \param[in] port COM port
* \param[in] buffer character buffer
* \param[in] len buffer length
* \return -1 if port not available
* \return 0 on success
*/
int32_t PIOS_COM_SendBuffer(COMPortTypeDef port, uint8_t *buffer, uint16_t len)
{
/* Branch depending on selected port */
switch(port) {
#if defined(PIOS_INCLUDE_USART)
case COM_DEBUG_USART:
return PIOS_USART_TxBufferPutMore(PIOS_COM_DEBUG_PORT, buffer, len);
#endif
#if PIOS_USART1_ENABLED
case COM_USART1:
return PIOS_USART_TxBufferPutMore(USART_1, buffer, len);
#endif
#if PIOS_USART2_ENABLED
case COM_USART2:
return PIOS_USART_TxBufferPutMore(USART_2, buffer, len);
#endif
#if PIOS_USART3_ENABLED
case COM_USART3:
return PIOS_USART_TxBufferPutMore(USART_3, buffer, len);
#endif
#if defined(PIOS_INCLUDE_USB_HID)
case COM_USB_HID:
return PIOS_USB_HID_TxBufferPutMore(buffer, len);
#endif
default:
/* Invalid port */
return -1;
}
}
/**
* Sends a single character over given port
* \param[in] port COM port
* \param[in] c character
* \return -1 if port not available
* \return -2 buffer is full
* caller should retry until buffer is free again
* \return 0 on success
*/
int32_t PIOS_COM_SendCharNonBlocking(COMPortTypeDef port, char c)
{
return PIOS_COM_SendBufferNonBlocking(port, (uint8_t *)&c, 1);
}
/**
* Sends a single character over given port
* (blocking function)
* \param[in] port COM port
* \param[in] c character
* \return -1 if port not available
* \return 0 on success
*/
int32_t PIOS_COM_SendChar(COMPortTypeDef port, char c)
{
return PIOS_COM_SendBuffer(port, (uint8_t *)&c, 1);
}
/**
* Sends a string over given port
* \param[in] port COM port
* \param[in] str zero-terminated string
* \return -1 if port not available
* \return -2 buffer is full
* caller should retry until buffer is free again
* \return 0 on success
*/
int32_t PIOS_COM_SendStringNonBlocking(COMPortTypeDef port, char *str)
{
return PIOS_COM_SendBufferNonBlocking(port, (uint8_t *)str, (uint16_t)strlen(str));
}
/**
* Sends a string over given port
* (blocking function)
* \param[in] port COM port
* \param[in] str zero-terminated string
* \return -1 if port not available
* \return 0 on success
*/
int32_t PIOS_COM_SendString(COMPortTypeDef port, char *str)
{
return PIOS_COM_SendBuffer(port, (uint8_t *)str, strlen(str));
}
/**
* Sends a formatted string (-> printf) over given port
* \param[in] port COM port
* \param[in] *format zero-terminated format string - 128 characters supported maximum!
* \param[in] ... optional arguments,
* 128 characters supported maximum!
* \return -2 if non-blocking mode activated: buffer is full
* caller should retry until buffer is free again
* \return 0 on success
*/
int32_t PIOS_COM_SendFormattedStringNonBlocking(COMPortTypeDef port, char *format, ...)
{
uint8_t buffer[128]; // TODO: tmp!!! Provide a streamed COM method later!
va_list args;
va_start(args, format);
vsprintf((char *)buffer, format, args);
return PIOS_COM_SendBufferNonBlocking(port, buffer, (uint16_t)strlen((char *)buffer));
}
/**
* Sends a formatted string (-> printf) over given port
* (blocking function)
* \param[in] port COM port
* \param[in] *format zero-terminated format string - 128 characters supported maximum!
* \param[in] ... optional arguments,
* \return -1 if port not available
* \return 0 on success
*/
int32_t PIOS_COM_SendFormattedString(COMPortTypeDef port, char *format, ...)
{
uint8_t buffer[128]; // TODO: tmp!!! Provide a streamed COM method later!
va_list args;
va_start(args, format);
vsprintf((char *)buffer, format, args);
return PIOS_COM_SendBuffer(port, buffer, (uint16_t)strlen((char *)buffer));
}
/**
* Transfer bytes from port buffers into another buffer
* \param[in] port COM port
* \returns Byte from buffer
*/
uint8_t PIOS_COM_ReceiveBuffer(COMPortTypeDef port)
{
switch(port) {
#if defined(PIOS_INCLUDE_USART)
case COM_DEBUG_USART:
return PIOS_USART_RxBufferGet(PIOS_COM_DEBUG_PORT);
#endif
#if PIOS_USART1_ENABLED
case COM_USART1:
return PIOS_USART_RxBufferGet(USART_1);
#endif
#if PIOS_USART2_ENABLED
case COM_USART2:
return PIOS_USART_RxBufferGet(USART_2);
#endif
#if PIOS_USART3_ENABLED
case COM_USART3:
return PIOS_USART_RxBufferGet(USART_3);
#endif
#if defined(PIOS_INCLUDE_USB_HID)
case COM_USB_HID:
return PIOS_USB_HID_RxBufferGet();
#endif
/* To suppress warnings */
default:
return 0;
}
}
/**
* Get the number of bytes waiting in the buffer
* \param[in] port COM port
* \return Number of bytes used in buffer
*/
int32_t PIOS_COM_ReceiveBufferUsed(COMPortTypeDef port)
{
switch(port) {
#if defined(PIOS_INCLUDE_USART)
case COM_DEBUG_USART:
return PIOS_USART_RxBufferUsed(PIOS_COM_DEBUG_PORT);
#if PIOS_USART1_ENABLED
case COM_USART1:
return PIOS_USART_RxBufferUsed(USART_1);
#endif
#if PIOS_USART2_ENABLED
case COM_USART2:
return PIOS_USART_RxBufferUsed(USART_2);
#endif
#if PIOS_USART3_ENABLED
case COM_USART3:
return PIOS_USART_RxBufferUsed(USART_3);
#endif
#endif
#if defined(PIOS_INCLUDE_USB_HID)
case COM_USB_HID:
return PIOS_USB_HID_RxBufferUsed();
#endif
/* To suppress warnings */
default:
return 0;
}
}
#endif