1 |
583 |
jeremybenn |
/*This file is prepared for Doxygen automatic documentation generation.*/
|
2 |
|
|
/*! \file *********************************************************************
|
3 |
|
|
*
|
4 |
|
|
* \brief USART driver for AVR32 UC3.
|
5 |
|
|
*
|
6 |
|
|
* This file contains basic functions for the AVR32 USART, with support for all
|
7 |
|
|
* modes, settings and clock speeds.
|
8 |
|
|
*
|
9 |
|
|
* - Compiler: IAR EWAVR32 and GNU GCC for AVR32
|
10 |
|
|
* - Supported devices: All AVR32 devices with a USART module can be used.
|
11 |
|
|
* - AppNote:
|
12 |
|
|
*
|
13 |
|
|
* \author Atmel Corporation: http://www.atmel.com \n
|
14 |
|
|
* Support and FAQ: http://support.atmel.no/
|
15 |
|
|
*
|
16 |
|
|
******************************************************************************/
|
17 |
|
|
|
18 |
|
|
/* Copyright (c) 2007, Atmel Corporation All rights reserved.
|
19 |
|
|
*
|
20 |
|
|
* Redistribution and use in source and binary forms, with or without
|
21 |
|
|
* modification, are permitted provided that the following conditions are met:
|
22 |
|
|
*
|
23 |
|
|
* 1. Redistributions of source code must retain the above copyright notice,
|
24 |
|
|
* this list of conditions and the following disclaimer.
|
25 |
|
|
*
|
26 |
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
27 |
|
|
* this list of conditions and the following disclaimer in the documentation
|
28 |
|
|
* and/or other materials provided with the distribution.
|
29 |
|
|
*
|
30 |
|
|
* 3. The name of ATMEL may not be used to endorse or promote products derived
|
31 |
|
|
* from this software without specific prior written permission.
|
32 |
|
|
*
|
33 |
|
|
* THIS SOFTWARE IS PROVIDED BY ATMEL ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
34 |
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
35 |
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY AND
|
36 |
|
|
* SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT,
|
37 |
|
|
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
38 |
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
39 |
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
40 |
|
|
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
41 |
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
42 |
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
43 |
|
|
*/
|
44 |
|
|
|
45 |
|
|
|
46 |
|
|
#ifndef _USART_H_
|
47 |
|
|
#define _USART_H_
|
48 |
|
|
|
49 |
|
|
#include <avr32/io.h>
|
50 |
|
|
#include "compiler.h"
|
51 |
|
|
|
52 |
|
|
|
53 |
|
|
/*! \name Return Values
|
54 |
|
|
*/
|
55 |
|
|
//! @{
|
56 |
|
|
#define USART_SUCCESS 0 //!< Successful completion.
|
57 |
|
|
#define USART_FAILURE -1 //!< Failure because of some unspecified reason.
|
58 |
|
|
#define USART_INVALID_INPUT 1 //!< Input value out of range.
|
59 |
|
|
#define USART_INVALID_ARGUMENT -1 //!< Argument value out of range.
|
60 |
|
|
#define USART_TX_BUSY 2 //!< Transmitter was busy.
|
61 |
|
|
#define USART_RX_EMPTY 3 //!< Nothing was received.
|
62 |
|
|
#define USART_RX_ERROR 4 //!< Transmission error occurred.
|
63 |
|
|
#define USART_MODE_FAULT 5 //!< USART not in the appropriate mode.
|
64 |
|
|
//! @}
|
65 |
|
|
|
66 |
|
|
//! Default time-out value (number of attempts).
|
67 |
|
|
#define USART_DEFAULT_TIMEOUT 10000
|
68 |
|
|
|
69 |
|
|
/*! \name Parity Settings
|
70 |
|
|
*/
|
71 |
|
|
//! @{
|
72 |
|
|
#define USART_EVEN_PARITY AVR32_USART_MR_PAR_EVEN //!< Use even parity on character transmission.
|
73 |
|
|
#define USART_ODD_PARITY AVR32_USART_MR_PAR_ODD //!< Use odd parity on character transmission.
|
74 |
|
|
#define USART_SPACE_PARITY AVR32_USART_MR_PAR_SPACE //!< Use a space as parity bit.
|
75 |
|
|
#define USART_MARK_PARITY AVR32_USART_MR_PAR_MARK //!< Use a mark as parity bit.
|
76 |
|
|
#define USART_NO_PARITY AVR32_USART_MR_PAR_NONE //!< Don't use a parity bit.
|
77 |
|
|
#define USART_MULTIDROP_PARITY AVR32_USART_MR_PAR_MULTI //!< Parity bit is used to flag address characters.
|
78 |
|
|
//! @}
|
79 |
|
|
|
80 |
|
|
/*! \name Operating Modes
|
81 |
|
|
*/
|
82 |
|
|
//! @{
|
83 |
|
|
#define USART_MODE_NORMAL AVR32_USART_MR_MODE_NORMAL //!< Normal RS232 mode.
|
84 |
|
|
#define USART_MODE_RS485 AVR32_USART_MR_MODE_RS485 //!< RS485 mode.
|
85 |
|
|
#define USART_MODE_HW_HSH AVR32_USART_MR_MODE_HARDWARE //!< RS232 mode with hardware handshaking.
|
86 |
|
|
#define USART_MODE_MODEM AVR32_USART_MR_MODE_MODEM //!< Modem mode.
|
87 |
|
|
#define USART_MODE_ISO7816_T0 AVR32_USART_MR_MODE_ISO7816_T0 //!< ISO7816, T = 0 mode.
|
88 |
|
|
#define USART_MODE_ISO7816_T1 AVR32_USART_MR_MODE_ISO7816_T1 //!< ISO7816, T = 1 mode.
|
89 |
|
|
#define USART_MODE_IRDA AVR32_USART_MR_MODE_IRDA //!< IrDA mode.
|
90 |
|
|
#define USART_MODE_SW_HSH AVR32_USART_MR_MODE_SOFTWARE //!< RS232 mode with software handshaking.
|
91 |
|
|
//! @}
|
92 |
|
|
|
93 |
|
|
|
94 |
|
|
/*! \name Channel Modes
|
95 |
|
|
*/
|
96 |
|
|
//! @{
|
97 |
|
|
#define USART_NORMAL_CHMODE AVR32_USART_MR_CHMODE_NORMAL //!< Normal communication.
|
98 |
|
|
#define USART_AUTO_ECHO AVR32_USART_MR_CHMODE_ECHO //!< Echo data.
|
99 |
|
|
#define USART_LOCAL_LOOPBACK AVR32_USART_MR_CHMODE_LOCAL_LOOP //!< Local loopback.
|
100 |
|
|
#define USART_REMOTE_LOOPBACK AVR32_USART_MR_CHMODE_REMOTE_LOOP //!< Remote loopback.
|
101 |
|
|
//! @}
|
102 |
|
|
|
103 |
|
|
/*! \name Stop Bits Settings
|
104 |
|
|
*/
|
105 |
|
|
//! @{
|
106 |
|
|
#define USART_1_STOPBIT AVR32_USART_MR_NBSTOP_1 //!< Use 1 stop bit.
|
107 |
|
|
#define USART_1_5_STOPBITS AVR32_USART_MR_NBSTOP_1_5 //!< Use 1.5 stop bits.
|
108 |
|
|
#define USART_2_STOPBITS AVR32_USART_MR_NBSTOP_2 //!< Use 2 stop bits (for more, just give the number of bits).
|
109 |
|
|
//! @}
|
110 |
|
|
|
111 |
|
|
|
112 |
|
|
//! Input parameters when initializing RS232 and similar modes.
|
113 |
|
|
typedef struct
|
114 |
|
|
{
|
115 |
|
|
//! Set baudrate of the USART.
|
116 |
|
|
unsigned long baudrate;
|
117 |
|
|
|
118 |
|
|
//! Number of bits to transmit as a character (5 to 9).
|
119 |
|
|
unsigned char charlength;
|
120 |
|
|
|
121 |
|
|
//! How to calculate the parity bit: \ref USART_EVEN_PARITY, \ref USART_ODD_PARITY,
|
122 |
|
|
//! \ref USART_SPACE_PARITY, \ref USART_MARK_PARITY, \ref USART_NO_PARITY or
|
123 |
|
|
//! \ref USART_MULTIDROP_PARITY.
|
124 |
|
|
unsigned char paritytype;
|
125 |
|
|
|
126 |
|
|
//! Number of stop bits between two characters: \ref USART_1_STOPBIT,
|
127 |
|
|
//! \ref USART_1_5_STOPBITS, \ref USART_2_STOPBITS or any number from 3 to 257
|
128 |
|
|
//! which will result in a time guard period of that length between characters.
|
129 |
|
|
unsigned short stopbits;
|
130 |
|
|
|
131 |
|
|
//! Run the channel in testmode: \ref USART_NORMAL_CHMODE, \ref USART_AUTO_ECHO,
|
132 |
|
|
//! \ref USART_LOCAL_LOOPBACK or \ref USART_REMOTE_LOOPBACK.
|
133 |
|
|
unsigned char channelmode;
|
134 |
|
|
} usart_options_t;
|
135 |
|
|
|
136 |
|
|
//! Input parameters when initializing ISO7816 modes.
|
137 |
|
|
typedef struct
|
138 |
|
|
{
|
139 |
|
|
//! Set the frequency of the ISO7816 clock.
|
140 |
|
|
unsigned long iso7816_hz;
|
141 |
|
|
|
142 |
|
|
//! The number of ISO7816 clock ticks in every bit period (1 to 2047, 0 = disable clock).
|
143 |
|
|
//! Bit rate = \ref iso7816_hz / \ref fidi_ratio.
|
144 |
|
|
unsigned short fidi_ratio;
|
145 |
|
|
|
146 |
|
|
//! Inhibit Non Acknowledge:\n
|
147 |
|
|
//! - 0: the NACK is generated;\n
|
148 |
|
|
//! - 1: the NACK is not generated.
|
149 |
|
|
//!
|
150 |
|
|
//! \note This bit will be used only in ISO7816 mode, protocol T = 0 receiver.
|
151 |
|
|
int inhibit_nack;
|
152 |
|
|
|
153 |
|
|
//! Disable successive NACKs.
|
154 |
|
|
//! Successive parity errors are counted up to the value in the \ref max_iterations field.
|
155 |
|
|
//! These parity errors generate a NACK on the ISO line. As soon as this value is reached,
|
156 |
|
|
//! no addititional NACK is sent on the ISO line. The ITERATION flag is asserted.
|
157 |
|
|
int dis_suc_nack;
|
158 |
|
|
|
159 |
|
|
//! Max number of repetitions (0 to 7).
|
160 |
|
|
unsigned char max_iterations;
|
161 |
|
|
|
162 |
|
|
//! Bit order in transmitted characters:\n
|
163 |
|
|
//! - 0: LSB first;\n
|
164 |
|
|
//! - 1: MSB first.
|
165 |
|
|
int bit_order;
|
166 |
|
|
} iso7816_options_t;
|
167 |
|
|
|
168 |
|
|
//! Input parameters when initializing ISO7816 modes.
|
169 |
|
|
typedef struct
|
170 |
|
|
{
|
171 |
|
|
//! Set the frequency of the SPI clock.
|
172 |
|
|
unsigned long baudrate;
|
173 |
|
|
|
174 |
|
|
//! Number of bits to transmit as a character (5 to 9).
|
175 |
|
|
unsigned char charlength;
|
176 |
|
|
|
177 |
|
|
//! Run the channel in testmode: \ref USART_NORMAL_CHMODE, \ref USART_AUTO_ECHO,
|
178 |
|
|
//! \ref USART_LOCAL_LOOPBACK or \ref USART_REMOTE_LOOPBACK.
|
179 |
|
|
unsigned char channelmode;
|
180 |
|
|
|
181 |
|
|
//! Which SPI mode to use when transmitting.
|
182 |
|
|
unsigned char spimode;
|
183 |
|
|
} usart_spi_options_t;
|
184 |
|
|
|
185 |
|
|
|
186 |
|
|
|
187 |
|
|
|
188 |
|
|
|
189 |
|
|
//------------------------------------------------------------------------------
|
190 |
|
|
/*! \name Initialization Functions
|
191 |
|
|
*/
|
192 |
|
|
//! @{
|
193 |
|
|
|
194 |
|
|
/*! \brief Resets the USART and disables TX and RX.
|
195 |
|
|
*
|
196 |
|
|
* \param usart Base address of the USART instance.
|
197 |
|
|
*/
|
198 |
|
|
extern void usart_reset(volatile avr32_usart_t *usart);
|
199 |
|
|
|
200 |
|
|
/*! \brief Sets up the USART to use the standard RS232 protocol.
|
201 |
|
|
*
|
202 |
|
|
* \param usart Base address of the USART instance.
|
203 |
|
|
* \param opt Options needed to set up RS232 communication (see \ref usart_options_t).
|
204 |
|
|
* \param pba_hz USART module input clock frequency (PBA clock, Hz).
|
205 |
|
|
*
|
206 |
|
|
* \retval USART_SUCCESS Mode successfully initialized.
|
207 |
|
|
* \retval USART_INVALID_INPUT One or more of the arguments is out of valid range.
|
208 |
|
|
*/
|
209 |
|
|
extern int usart_init_rs232(volatile avr32_usart_t *usart, const usart_options_t *opt, long pba_hz);
|
210 |
|
|
|
211 |
|
|
/*! \brief Sets up the USART to use hardware handshaking.
|
212 |
|
|
*
|
213 |
|
|
* \param usart Base address of the USART instance.
|
214 |
|
|
* \param opt Options needed to set up RS232 communication (see \ref usart_options_t).
|
215 |
|
|
* \param pba_hz USART module input clock frequency (PBA clock, Hz).
|
216 |
|
|
*
|
217 |
|
|
* \retval USART_SUCCESS Mode successfully initialized.
|
218 |
|
|
* \retval USART_INVALID_INPUT One or more of the arguments is out of valid range.
|
219 |
|
|
*
|
220 |
|
|
* \note \ref usart_init_rs232 does not need to be invoked before this function.
|
221 |
|
|
*/
|
222 |
|
|
extern int usart_init_hw_handshaking(volatile avr32_usart_t *usart, const usart_options_t *opt, long pba_hz);
|
223 |
|
|
|
224 |
|
|
/*! \brief Sets up the USART to use the IrDA protocol.
|
225 |
|
|
*
|
226 |
|
|
* \param usart Base address of the USART instance.
|
227 |
|
|
* \param opt Options needed to set up RS232 communication (see \ref usart_options_t).
|
228 |
|
|
* \param pba_hz USART module input clock frequency (PBA clock, Hz).
|
229 |
|
|
* \param irda_filter Counter used to distinguish received ones from zeros.
|
230 |
|
|
*
|
231 |
|
|
* \retval USART_SUCCESS Mode successfully initialized.
|
232 |
|
|
* \retval USART_INVALID_INPUT One or more of the arguments is out of valid range.
|
233 |
|
|
*/
|
234 |
|
|
extern int usart_init_IrDA(volatile avr32_usart_t *usart, const usart_options_t *opt,
|
235 |
|
|
long pba_hz, unsigned char irda_filter);
|
236 |
|
|
|
237 |
|
|
/*! \brief Sets up the USART to use the modem protocol, activating dedicated inputs/outputs.
|
238 |
|
|
*
|
239 |
|
|
* \param usart Base address of the USART instance.
|
240 |
|
|
* \param opt Options needed to set up RS232 communication (see \ref usart_options_t).
|
241 |
|
|
* \param pba_hz USART module input clock frequency (PBA clock, Hz).
|
242 |
|
|
*
|
243 |
|
|
* \retval USART_SUCCESS Mode successfully initialized.
|
244 |
|
|
* \retval USART_INVALID_INPUT One or more of the arguments is out of valid range.
|
245 |
|
|
*/
|
246 |
|
|
extern int usart_init_modem(volatile avr32_usart_t *usart, const usart_options_t *opt, long pba_hz);
|
247 |
|
|
|
248 |
|
|
/*! \brief Sets up the USART to use the RS485 protocol.
|
249 |
|
|
*
|
250 |
|
|
* \param usart Base address of the USART instance.
|
251 |
|
|
* \param opt Options needed to set up RS232 communication (see \ref usart_options_t).
|
252 |
|
|
* \param pba_hz USART module input clock frequency (PBA clock, Hz).
|
253 |
|
|
*
|
254 |
|
|
* \retval USART_SUCCESS Mode successfully initialized.
|
255 |
|
|
* \retval USART_INVALID_INPUT One or more of the arguments is out of valid range.
|
256 |
|
|
*/
|
257 |
|
|
extern int usart_init_rs485(volatile avr32_usart_t *usart, const usart_options_t *opt, long pba_hz);
|
258 |
|
|
|
259 |
|
|
/*! \brief Sets up the USART to use the ISO7816 T=0 or T=1 smartcard protocols.
|
260 |
|
|
*
|
261 |
|
|
* \param usart Base address of the USART instance.
|
262 |
|
|
* \param opt Options needed to set up ISO7816 communication (see \ref iso7816_options_t).
|
263 |
|
|
* \param t ISO7816 mode to use (T=0 or T=1).
|
264 |
|
|
* \param pba_hz USART module input clock frequency (PBA clock, Hz).
|
265 |
|
|
*
|
266 |
|
|
* \retval USART_SUCCESS Mode successfully initialized.
|
267 |
|
|
* \retval USART_INVALID_INPUT One or more of the arguments is out of valid range.
|
268 |
|
|
*/
|
269 |
|
|
extern int usart_init_iso7816(volatile avr32_usart_t *usart, const iso7816_options_t *opt, int t, long pba_hz);
|
270 |
|
|
|
271 |
|
|
/*! \brief Sets up the USART to use the SPI mode as master.
|
272 |
|
|
*
|
273 |
|
|
* \param usart Base address of the USART instance.
|
274 |
|
|
* \param opt Options needed to set up SPI mode (see \ref usart_spi_options_t).
|
275 |
|
|
* \param pba_hz USART module input clock frequency (PBA clock, Hz).
|
276 |
|
|
*
|
277 |
|
|
* \retval USART_SUCCESS Mode successfully initialized.
|
278 |
|
|
* \retval USART_INVALID_INPUT One or more of the arguments is out of valid range.
|
279 |
|
|
*/
|
280 |
|
|
extern int usart_init_spi_master(volatile avr32_usart_t *usart, const usart_spi_options_t *opt, long pba_hz);
|
281 |
|
|
|
282 |
|
|
|
283 |
|
|
/*! \brief Sets up the USART to use the SPI mode as slave.
|
284 |
|
|
*
|
285 |
|
|
* \param usart Base address of the USART instance.
|
286 |
|
|
* \param opt Options needed to set up SPI mode (see \ref usart_spi_options_t).
|
287 |
|
|
* \param pba_hz USART module input clock frequency (PBA clock, Hz).
|
288 |
|
|
*
|
289 |
|
|
* \retval USART_SUCCESS Mode successfully initialized.
|
290 |
|
|
* \retval USART_INVALID_INPUT One or more of the arguments is out of valid range.
|
291 |
|
|
*/
|
292 |
|
|
extern int usart_init_spi_slave(volatile avr32_usart_t *usart, const usart_spi_options_t *opt, long pba_hz);
|
293 |
|
|
|
294 |
|
|
//! @}
|
295 |
|
|
|
296 |
|
|
//------------------------------------------------------------------------------
|
297 |
|
|
/*! \brief Selects slave chip.
|
298 |
|
|
*
|
299 |
|
|
* \param usart Base address of the USART instance.
|
300 |
|
|
*
|
301 |
|
|
* \return Status.
|
302 |
|
|
* \retval USART_SUCCESS Success.
|
303 |
|
|
*/
|
304 |
|
|
extern int usart_spi_selectChip(volatile avr32_usart_t *usart);
|
305 |
|
|
|
306 |
|
|
/*! \brief Unselects slave chip.
|
307 |
|
|
*
|
308 |
|
|
* \param usart Base address of the USART instance.
|
309 |
|
|
*
|
310 |
|
|
* \return Status.
|
311 |
|
|
* \retval USART_SUCCESS Success.
|
312 |
|
|
* \retval USART_FAILURE Time out.
|
313 |
|
|
*/
|
314 |
|
|
extern int usart_spi_unselectChip(volatile avr32_usart_t *usart);
|
315 |
|
|
|
316 |
|
|
//------------------------------------------------------------------------------
|
317 |
|
|
/*! \name Read and Reset Error Status Bits
|
318 |
|
|
*/
|
319 |
|
|
//! @{
|
320 |
|
|
|
321 |
|
|
/*! \brief Resets the error status.
|
322 |
|
|
*
|
323 |
|
|
* This function resets the status bits indicating that a parity error,
|
324 |
|
|
* framing error or overrun has occurred. The RXBRK bit, indicating
|
325 |
|
|
* a start/end of break condition on the RX line, is also reset.
|
326 |
|
|
*
|
327 |
|
|
* \param usart Base address of the USART instance.
|
328 |
|
|
*/
|
329 |
|
|
#if __GNUC__
|
330 |
|
|
__attribute__((__always_inline__))
|
331 |
|
|
#endif
|
332 |
|
|
extern __inline__ void usart_reset_status(volatile avr32_usart_t *usart)
|
333 |
|
|
{
|
334 |
|
|
usart->cr |= AVR32_USART_CR_RSTSTA_MASK;
|
335 |
|
|
}
|
336 |
|
|
|
337 |
|
|
/*! \brief Checks if a parity error has occurred since last status reset.
|
338 |
|
|
*
|
339 |
|
|
* \param usart Base address of the USART instance.
|
340 |
|
|
*
|
341 |
|
|
* \return \c 1 if a parity error has been detected, otherwise \c 0.
|
342 |
|
|
*/
|
343 |
|
|
#if __GNUC__
|
344 |
|
|
__attribute__((__always_inline__))
|
345 |
|
|
#endif
|
346 |
|
|
extern __inline__ int usart_parity_error(volatile avr32_usart_t *usart)
|
347 |
|
|
{
|
348 |
|
|
return (usart->csr & AVR32_USART_CSR_PARE_MASK) != 0;
|
349 |
|
|
}
|
350 |
|
|
|
351 |
|
|
/*! \brief Checks if a framing error has occurred since last status reset.
|
352 |
|
|
*
|
353 |
|
|
* \param usart Base address of the USART instance.
|
354 |
|
|
*
|
355 |
|
|
* \return \c 1 if a framing error has been detected, otherwise \c 0.
|
356 |
|
|
*/
|
357 |
|
|
#if __GNUC__
|
358 |
|
|
__attribute__((__always_inline__))
|
359 |
|
|
#endif
|
360 |
|
|
extern __inline__ int usart_framing_error(volatile avr32_usart_t *usart)
|
361 |
|
|
{
|
362 |
|
|
return (usart->csr & AVR32_USART_CSR_FRAME_MASK) != 0;
|
363 |
|
|
}
|
364 |
|
|
|
365 |
|
|
/*! \brief Checks if an overrun error has occurred since last status reset.
|
366 |
|
|
*
|
367 |
|
|
* \param usart Base address of the USART instance.
|
368 |
|
|
*
|
369 |
|
|
* \return \c 1 if a overrun error has been detected, otherwise \c 0.
|
370 |
|
|
*/
|
371 |
|
|
#if __GNUC__
|
372 |
|
|
__attribute__((__always_inline__))
|
373 |
|
|
#endif
|
374 |
|
|
extern __inline__ int usart_overrun_error(volatile avr32_usart_t *usart)
|
375 |
|
|
{
|
376 |
|
|
return (usart->csr & AVR32_USART_CSR_OVRE_MASK) != 0;
|
377 |
|
|
}
|
378 |
|
|
|
379 |
|
|
//! @}
|
380 |
|
|
|
381 |
|
|
|
382 |
|
|
//------------------------------------------------------------------------------
|
383 |
|
|
/*! \name Transmit/Receive Functions
|
384 |
|
|
*/
|
385 |
|
|
//! @{
|
386 |
|
|
|
387 |
|
|
/*! \brief Addresses a receiver.
|
388 |
|
|
*
|
389 |
|
|
* While in RS485 mode, receivers only accept data addressed to them.
|
390 |
|
|
* A packet/char with the address tag set has to precede any data.
|
391 |
|
|
* This function is used to address a receiver. This receiver should read
|
392 |
|
|
* all the following data, until an address packet addresses another receiver.
|
393 |
|
|
*
|
394 |
|
|
* \param usart Base address of the USART instance.
|
395 |
|
|
* \param address Address of the target device.
|
396 |
|
|
*
|
397 |
|
|
* \retval USART_SUCCESS Address successfully sent (if current mode is RS485).
|
398 |
|
|
* \retval USART_MODE_FAULT Wrong operating mode.
|
399 |
|
|
*/
|
400 |
|
|
extern int usart_send_address(volatile avr32_usart_t *usart, int address);
|
401 |
|
|
|
402 |
|
|
/*! \brief Writes the given character to the TX buffer if the transmitter is ready.
|
403 |
|
|
*
|
404 |
|
|
* \param usart Base address of the USART instance.
|
405 |
|
|
* \param c The character (up to 9 bits) to transmit.
|
406 |
|
|
*
|
407 |
|
|
* \retval USART_SUCCESS The transmitter was ready.
|
408 |
|
|
* \retval USART_TX_BUSY The transmitter was busy.
|
409 |
|
|
*/
|
410 |
|
|
extern int usart_write_char(volatile avr32_usart_t *usart, int c);
|
411 |
|
|
|
412 |
|
|
/*! \brief An active wait writing a character to the USART.
|
413 |
|
|
*
|
414 |
|
|
* \param usart Base address of the USART instance.
|
415 |
|
|
* \param c The character (up to 9 bits) to transmit.
|
416 |
|
|
*/
|
417 |
|
|
#if __GNUC__
|
418 |
|
|
__attribute__((__always_inline__))
|
419 |
|
|
#endif
|
420 |
|
|
extern __inline__ void usart_bw_write_char(volatile avr32_usart_t *usart, int c)
|
421 |
|
|
{
|
422 |
|
|
while (usart_write_char(usart, c) != USART_SUCCESS);
|
423 |
|
|
}
|
424 |
|
|
|
425 |
|
|
/*! \brief Sends a character with the USART.
|
426 |
|
|
*
|
427 |
|
|
* \param usart Base address of the USART instance.
|
428 |
|
|
* \param c Character to write.
|
429 |
|
|
*
|
430 |
|
|
* \retval USART_SUCCESS The character was written.
|
431 |
|
|
* \retval USART_FAILURE The function timed out before the USART transmitter became ready to send.
|
432 |
|
|
*/
|
433 |
|
|
extern int usart_putchar(volatile avr32_usart_t *usart, int c);
|
434 |
|
|
|
435 |
|
|
/*! \brief Checks the RX buffer for a received character, and stores it at the
|
436 |
|
|
* given memory location.
|
437 |
|
|
*
|
438 |
|
|
* \param usart Base address of the USART instance.
|
439 |
|
|
* \param c Pointer to the where the read character should be stored
|
440 |
|
|
* (must be at least short in order to accept 9-bit characters).
|
441 |
|
|
*
|
442 |
|
|
* \retval USART_SUCCESS The character was read successfully.
|
443 |
|
|
* \retval USART_RX_EMPTY The RX buffer was empty.
|
444 |
|
|
* \retval USART_RX_ERROR An error was deteceted.
|
445 |
|
|
*/
|
446 |
|
|
extern int usart_read_char(volatile avr32_usart_t *usart, int *c);
|
447 |
|
|
|
448 |
|
|
/*! \brief Waits until a character is received, and returns it.
|
449 |
|
|
*
|
450 |
|
|
* \param usart Base address of the USART instance.
|
451 |
|
|
*
|
452 |
|
|
* \return The received character, or \ref USART_FAILURE upon error.
|
453 |
|
|
*/
|
454 |
|
|
extern int usart_getchar(volatile avr32_usart_t *usart);
|
455 |
|
|
|
456 |
|
|
/*! \brief Writes one character string to the USART.
|
457 |
|
|
*
|
458 |
|
|
* \param usart Base address of the USART instance.
|
459 |
|
|
* \param string String to be written.
|
460 |
|
|
*/
|
461 |
|
|
extern void usart_write_line(volatile avr32_usart_t *usart, const char *string);
|
462 |
|
|
|
463 |
|
|
/*! \brief Gets and echoes characters until end of line.
|
464 |
|
|
*
|
465 |
|
|
* \param usart Base address of the USART instance.
|
466 |
|
|
*
|
467 |
|
|
* \retval USART_SUCCESS Success.
|
468 |
|
|
* \retval USART_FAILURE ETX character received.
|
469 |
|
|
*/
|
470 |
|
|
extern int usart_get_echo_line(volatile avr32_usart_t *usart);
|
471 |
|
|
|
472 |
|
|
//! @}
|
473 |
|
|
|
474 |
|
|
|
475 |
|
|
#endif // _USART_H_
|