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TARGET_SAMD21G18A/TOOLCHAIN_ARM_MICRO/usart.h@171:3a7713b1edbc, 2018-11-08 (annotated)
- Committer:
- AnnaBridge
- Date:
- Thu Nov 08 11:45:42 2018 +0000
- Revision:
- 171:3a7713b1edbc
- Parent:
- TARGET_SAMD21G18A/TARGET_Atmel/TARGET_SAM_CortexM0P/drivers/sercom/usart/usart.h@111:4336505e4b1c
mbed library. Release version 164
Who changed what in which revision?
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Kojto | 111:4336505e4b1c | 1 | /** |
Kojto | 111:4336505e4b1c | 2 | * |
Kojto | 111:4336505e4b1c | 3 | * \file |
Kojto | 111:4336505e4b1c | 4 | * |
Kojto | 111:4336505e4b1c | 5 | * \brief SAM SERCOM USART Driver |
Kojto | 111:4336505e4b1c | 6 | * |
Kojto | 111:4336505e4b1c | 7 | * Copyright (C) 2012-2015 Atmel Corporation. All rights reserved. |
Kojto | 111:4336505e4b1c | 8 | * |
Kojto | 111:4336505e4b1c | 9 | * \asf_license_start |
Kojto | 111:4336505e4b1c | 10 | * |
Kojto | 111:4336505e4b1c | 11 | * \page License |
Kojto | 111:4336505e4b1c | 12 | * |
Kojto | 111:4336505e4b1c | 13 | * Redistribution and use in source and binary forms, with or without |
Kojto | 111:4336505e4b1c | 14 | * modification, are permitted provided that the following conditions are met: |
Kojto | 111:4336505e4b1c | 15 | * |
Kojto | 111:4336505e4b1c | 16 | * 1. Redistributions of source code must retain the above copyright notice, |
Kojto | 111:4336505e4b1c | 17 | * this list of conditions and the following disclaimer. |
Kojto | 111:4336505e4b1c | 18 | * |
Kojto | 111:4336505e4b1c | 19 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
Kojto | 111:4336505e4b1c | 20 | * this list of conditions and the following disclaimer in the documentation |
Kojto | 111:4336505e4b1c | 21 | * and/or other materials provided with the distribution. |
Kojto | 111:4336505e4b1c | 22 | * |
Kojto | 111:4336505e4b1c | 23 | * 3. The name of Atmel may not be used to endorse or promote products derived |
Kojto | 111:4336505e4b1c | 24 | * from this software without specific prior written permission. |
Kojto | 111:4336505e4b1c | 25 | * |
Kojto | 111:4336505e4b1c | 26 | * 4. This software may only be redistributed and used in connection with an |
Kojto | 111:4336505e4b1c | 27 | * Atmel microcontroller product. |
Kojto | 111:4336505e4b1c | 28 | * |
Kojto | 111:4336505e4b1c | 29 | * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED |
Kojto | 111:4336505e4b1c | 30 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
Kojto | 111:4336505e4b1c | 31 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE |
Kojto | 111:4336505e4b1c | 32 | * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR |
Kojto | 111:4336505e4b1c | 33 | * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
Kojto | 111:4336505e4b1c | 34 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
Kojto | 111:4336505e4b1c | 35 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
Kojto | 111:4336505e4b1c | 36 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
Kojto | 111:4336505e4b1c | 37 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
Kojto | 111:4336505e4b1c | 38 | * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
Kojto | 111:4336505e4b1c | 39 | * POSSIBILITY OF SUCH DAMAGE. |
Kojto | 111:4336505e4b1c | 40 | * |
Kojto | 111:4336505e4b1c | 41 | * \asf_license_stop |
Kojto | 111:4336505e4b1c | 42 | * |
Kojto | 111:4336505e4b1c | 43 | */ |
Kojto | 111:4336505e4b1c | 44 | /* |
Kojto | 111:4336505e4b1c | 45 | * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a> |
Kojto | 111:4336505e4b1c | 46 | */ |
Kojto | 111:4336505e4b1c | 47 | #ifndef USART_H_INCLUDED |
Kojto | 111:4336505e4b1c | 48 | #define USART_H_INCLUDED |
Kojto | 111:4336505e4b1c | 49 | |
Kojto | 111:4336505e4b1c | 50 | /** |
Kojto | 111:4336505e4b1c | 51 | * \defgroup asfdoc_sam0_sercom_usart_group SAM Serial USART Driver (SERCOM USART) |
Kojto | 111:4336505e4b1c | 52 | * |
Kojto | 111:4336505e4b1c | 53 | * This driver for Atmel® | SMART SAM devices provides an interface for the configuration |
Kojto | 111:4336505e4b1c | 54 | * and management of the SERCOM module in its USART mode to transfer or receive |
Kojto | 111:4336505e4b1c | 55 | * USART data frames. The following driver API modes are covered by this |
Kojto | 111:4336505e4b1c | 56 | * manual: |
Kojto | 111:4336505e4b1c | 57 | * |
Kojto | 111:4336505e4b1c | 58 | * - Polled APIs |
Kojto | 111:4336505e4b1c | 59 | * \if USART_CALLBACK_MODE |
Kojto | 111:4336505e4b1c | 60 | * - Callback APIs |
Kojto | 111:4336505e4b1c | 61 | * \endif |
Kojto | 111:4336505e4b1c | 62 | * |
Kojto | 111:4336505e4b1c | 63 | * The following peripherals are used by this module: |
Kojto | 111:4336505e4b1c | 64 | * - SERCOM (Serial Communication Interface) |
Kojto | 111:4336505e4b1c | 65 | * |
Kojto | 111:4336505e4b1c | 66 | * The following devices can use this module: |
Kojto | 111:4336505e4b1c | 67 | * - Atmel | SMART SAM D20/D21 |
Kojto | 111:4336505e4b1c | 68 | * - Atmel | SMART SAM R21 |
Kojto | 111:4336505e4b1c | 69 | * - Atmel | SMART SAM D10/D11 |
Kojto | 111:4336505e4b1c | 70 | * - Atmel | SMART SAM L21 |
Kojto | 111:4336505e4b1c | 71 | * - Atmel | SMART SAM DAx |
Kojto | 111:4336505e4b1c | 72 | * - Atmel | SMART SAM C20/C21 |
Kojto | 111:4336505e4b1c | 73 | * |
Kojto | 111:4336505e4b1c | 74 | * The outline of this documentation is as follows: |
Kojto | 111:4336505e4b1c | 75 | * - \ref asfdoc_sam0_sercom_usart_prerequisites |
Kojto | 111:4336505e4b1c | 76 | * - \ref asfdoc_sam0_sercom_usart_overview |
Kojto | 111:4336505e4b1c | 77 | * - \ref asfdoc_sam0_sercom_usart_special_considerations |
Kojto | 111:4336505e4b1c | 78 | * - \ref asfdoc_sam0_sercom_usart_extra_info |
Kojto | 111:4336505e4b1c | 79 | * - \ref asfdoc_sam0_sercom_usart_examples |
Kojto | 111:4336505e4b1c | 80 | * - \ref asfdoc_sam0_sercom_usart_api_overview |
Kojto | 111:4336505e4b1c | 81 | * |
Kojto | 111:4336505e4b1c | 82 | * \section asfdoc_sam0_sercom_usart_prerequisites Prerequisites |
Kojto | 111:4336505e4b1c | 83 | * |
Kojto | 111:4336505e4b1c | 84 | * To use the USART you need to have a GCLK generator enabled and running |
Kojto | 111:4336505e4b1c | 85 | * that can be used as the SERCOM clock source. This can either be configured |
Kojto | 111:4336505e4b1c | 86 | * in conf_clocks.h or by using the system clock driver. |
Kojto | 111:4336505e4b1c | 87 | * |
Kojto | 111:4336505e4b1c | 88 | * \section asfdoc_sam0_sercom_usart_overview Module Overview |
Kojto | 111:4336505e4b1c | 89 | * |
Kojto | 111:4336505e4b1c | 90 | * This driver will use one (or more) SERCOM interfaces on the system |
Kojto | 111:4336505e4b1c | 91 | * and configure it to run as a USART interface in either synchronous |
Kojto | 111:4336505e4b1c | 92 | * or asynchronous mode. |
Kojto | 111:4336505e4b1c | 93 | * |
Kojto | 111:4336505e4b1c | 94 | * \subsection asfdoc_sam0_sercom_usart_features Driver Feature Macro Definition |
Kojto | 111:4336505e4b1c | 95 | * <table> |
Kojto | 111:4336505e4b1c | 96 | * <tr> |
Kojto | 111:4336505e4b1c | 97 | * <th>Driver Feature Macro</th> |
Kojto | 111:4336505e4b1c | 98 | * <th>Supported devices</th> |
Kojto | 111:4336505e4b1c | 99 | * </tr> |
Kojto | 111:4336505e4b1c | 100 | * <tr> |
Kojto | 111:4336505e4b1c | 101 | * <td>FEATURE_USART_SYNC_SCHEME_V2</td> |
Kojto | 111:4336505e4b1c | 102 | * <td>SAM D21/R21/D10/D11/L21/DAx/C20/C21</td> |
Kojto | 111:4336505e4b1c | 103 | * </tr> |
Kojto | 111:4336505e4b1c | 104 | * <tr> |
Kojto | 111:4336505e4b1c | 105 | * <td>FEATURE_USART_OVER_SAMPLE</td> |
Kojto | 111:4336505e4b1c | 106 | * <td>SAM D21/R21/D10/D11/L21/DAx/C20/C21</td> |
Kojto | 111:4336505e4b1c | 107 | * </tr> |
Kojto | 111:4336505e4b1c | 108 | * <tr> |
Kojto | 111:4336505e4b1c | 109 | * <td>FEATURE_USART_HARDWARE_FLOW_CONTROL</td> |
Kojto | 111:4336505e4b1c | 110 | * <td>SAM D21/R21/D10/D11/L21/DAx/C20/C21</td> |
Kojto | 111:4336505e4b1c | 111 | * </tr> |
Kojto | 111:4336505e4b1c | 112 | * <tr> |
Kojto | 111:4336505e4b1c | 113 | * <td>FEATURE_USART_IRDA</td> |
Kojto | 111:4336505e4b1c | 114 | * <td>SAM D21/R21/D10/D11/L21/DAx/C20/C21</td> |
Kojto | 111:4336505e4b1c | 115 | * </tr> |
Kojto | 111:4336505e4b1c | 116 | * <tr> |
Kojto | 111:4336505e4b1c | 117 | * <td>FEATURE_USART_LIN_SLAVE</td> |
Kojto | 111:4336505e4b1c | 118 | * <td>SAM D21/R21/D10/D11/L21/DAx/C20/C21</td> |
Kojto | 111:4336505e4b1c | 119 | * </tr> |
Kojto | 111:4336505e4b1c | 120 | * <tr> |
Kojto | 111:4336505e4b1c | 121 | * <td>FEATURE_USART_COLLISION_DECTION</td> |
Kojto | 111:4336505e4b1c | 122 | * <td>SAM D21/R21/D10/D11/L21/DAx/C20/C21</td> |
Kojto | 111:4336505e4b1c | 123 | * </tr> |
Kojto | 111:4336505e4b1c | 124 | * <tr> |
Kojto | 111:4336505e4b1c | 125 | * <td>FEATURE_USART_START_FRAME_DECTION</td> |
Kojto | 111:4336505e4b1c | 126 | * <td>SAM D21/R21/D10/D11/L21/DAx/C20/C21</td> |
Kojto | 111:4336505e4b1c | 127 | * </tr> |
Kojto | 111:4336505e4b1c | 128 | * <tr> |
Kojto | 111:4336505e4b1c | 129 | * <td>FEATURE_USART_IMMEDIATE_BUFFER_OVERFLOW_NOTIFICATION</td> |
Kojto | 111:4336505e4b1c | 130 | * <td>SAM D21/R21/D10/D11/L21/DAx/C20/C21</td> |
Kojto | 111:4336505e4b1c | 131 | * </tr> |
Kojto | 111:4336505e4b1c | 132 | * <tr> |
Kojto | 111:4336505e4b1c | 133 | * <td>FEATURE_USART_RS485</td> |
Kojto | 111:4336505e4b1c | 134 | * <td>SAM C20/C21</td> |
Kojto | 111:4336505e4b1c | 135 | * </tr> |
Kojto | 111:4336505e4b1c | 136 | * <tr> |
Kojto | 111:4336505e4b1c | 137 | * <td>FEATURE_USART_LIN_MASTER</td> |
Kojto | 111:4336505e4b1c | 138 | * <td>SAM C20/C21</td> |
Kojto | 111:4336505e4b1c | 139 | * </tr> |
Kojto | 111:4336505e4b1c | 140 | * </table> |
Kojto | 111:4336505e4b1c | 141 | * \note The specific features are only available in the driver when the |
Kojto | 111:4336505e4b1c | 142 | * selected device supports those features. |
Kojto | 111:4336505e4b1c | 143 | * |
Kojto | 111:4336505e4b1c | 144 | * \subsection asfdoc_sam0_sercom_usart_overview_frame_format Frame Format |
Kojto | 111:4336505e4b1c | 145 | * |
Kojto | 111:4336505e4b1c | 146 | * Communication is based on frames, where the frame format can be customized |
Kojto | 111:4336505e4b1c | 147 | * to accommodate a wide range of standards. A frame consists of a start bit, |
Kojto | 111:4336505e4b1c | 148 | * a number of data bits, an optional parity bit for error detection as well |
Kojto | 111:4336505e4b1c | 149 | * as a configurable length stop bit(s) - see |
Kojto | 111:4336505e4b1c | 150 | * \ref asfdoc_sam0_sercom_usart_frame_diagram "the figure below". |
Kojto | 111:4336505e4b1c | 151 | * \ref asfdoc_sam0_sercom_usart_frame_params "The table below" shows the |
Kojto | 111:4336505e4b1c | 152 | * available parameters you can change in a frame. |
Kojto | 111:4336505e4b1c | 153 | * |
Kojto | 111:4336505e4b1c | 154 | * \anchor asfdoc_sam0_sercom_usart_frame_params |
Kojto | 111:4336505e4b1c | 155 | * <table> |
Kojto | 111:4336505e4b1c | 156 | * <caption>USART Frame Parameters</caption> |
Kojto | 111:4336505e4b1c | 157 | * <tr> |
Kojto | 111:4336505e4b1c | 158 | * <th>Parameter</th> |
Kojto | 111:4336505e4b1c | 159 | * <th>Options</th> |
Kojto | 111:4336505e4b1c | 160 | * </tr> |
Kojto | 111:4336505e4b1c | 161 | * <tr> |
Kojto | 111:4336505e4b1c | 162 | * <td>Start bit</td> |
Kojto | 111:4336505e4b1c | 163 | * <td>1</td> |
Kojto | 111:4336505e4b1c | 164 | * </tr> |
Kojto | 111:4336505e4b1c | 165 | * <tr> |
Kojto | 111:4336505e4b1c | 166 | * <td>Data bits</td> |
Kojto | 111:4336505e4b1c | 167 | * <td>5, 6, 7, 8, 9</td> |
Kojto | 111:4336505e4b1c | 168 | * </tr> |
Kojto | 111:4336505e4b1c | 169 | * <tr> |
Kojto | 111:4336505e4b1c | 170 | * <td>Parity bit</td> |
Kojto | 111:4336505e4b1c | 171 | * <td>None, Even, Odd</td> |
Kojto | 111:4336505e4b1c | 172 | * </tr> |
Kojto | 111:4336505e4b1c | 173 | * <tr> |
Kojto | 111:4336505e4b1c | 174 | * <td>Stop bits</td> |
Kojto | 111:4336505e4b1c | 175 | * <td>1, 2</td> |
Kojto | 111:4336505e4b1c | 176 | * </tr> |
Kojto | 111:4336505e4b1c | 177 | * </table> |
Kojto | 111:4336505e4b1c | 178 | * |
Kojto | 111:4336505e4b1c | 179 | * \anchor asfdoc_sam0_sercom_usart_frame_diagram |
Kojto | 111:4336505e4b1c | 180 | * \image html usart_frame.svg "USART Frame Overview" width=100% |
Kojto | 111:4336505e4b1c | 181 | * |
Kojto | 111:4336505e4b1c | 182 | * \subsection asfdoc_sam0_sercom_usart_overview_sync Synchronous Mode |
Kojto | 111:4336505e4b1c | 183 | * |
Kojto | 111:4336505e4b1c | 184 | * In synchronous mode a dedicated clock line is provided; either by the USART |
Kojto | 111:4336505e4b1c | 185 | * itself if in master mode, or by an external master if in slave mode. |
Kojto | 111:4336505e4b1c | 186 | * Maximum transmission speed is the same as the GCLK clocking the USART |
Kojto | 111:4336505e4b1c | 187 | * peripheral when in slave mode, and the GCLK divided by two if in |
Kojto | 111:4336505e4b1c | 188 | * master mode. In synchronous mode the interface needs three lines to |
Kojto | 111:4336505e4b1c | 189 | * communicate: |
Kojto | 111:4336505e4b1c | 190 | * - TX (Transmit pin) |
Kojto | 111:4336505e4b1c | 191 | * - RX (Receive pin) |
Kojto | 111:4336505e4b1c | 192 | * - XCK (Clock pin) |
Kojto | 111:4336505e4b1c | 193 | * |
Kojto | 111:4336505e4b1c | 194 | * \subsubsection asfdoc_sam0_sercom_usart_overview_sync_sampling Data Sampling |
Kojto | 111:4336505e4b1c | 195 | * In synchronous mode the data is sampled on either the rising or falling edge |
Kojto | 111:4336505e4b1c | 196 | * of the clock signal. This is configured by setting the clock polarity in the |
Kojto | 111:4336505e4b1c | 197 | * configuration struct. |
Kojto | 111:4336505e4b1c | 198 | * |
Kojto | 111:4336505e4b1c | 199 | * \subsection asfdoc_sam0_sercom_usart_overview_async Asynchronous Mode |
Kojto | 111:4336505e4b1c | 200 | * |
Kojto | 111:4336505e4b1c | 201 | * In asynchronous mode no dedicated clock line is used, and the communication |
Kojto | 111:4336505e4b1c | 202 | * is based on matching the clock speed on the transmitter and receiver. The |
Kojto | 111:4336505e4b1c | 203 | * clock is generated from the internal SERCOM baudrate generator, and the |
Kojto | 111:4336505e4b1c | 204 | * frames are synchronized by using the frame start bits. Maximum transmission |
Kojto | 111:4336505e4b1c | 205 | * speed is limited to the SERCOM GCLK divided by 16. |
Kojto | 111:4336505e4b1c | 206 | * In asynchronous mode the interface only needs two lines to communicate: |
Kojto | 111:4336505e4b1c | 207 | * - TX (Transmit pin) |
Kojto | 111:4336505e4b1c | 208 | * - RX (Receive pin) |
Kojto | 111:4336505e4b1c | 209 | * |
Kojto | 111:4336505e4b1c | 210 | * \subsubsection asfdoc_sam0_sercom_usart_overview_async_clock_matching Transmitter/receiver Clock Matching |
Kojto | 111:4336505e4b1c | 211 | * |
Kojto | 111:4336505e4b1c | 212 | * For successful transmit and receive using the asynchronous mode the receiver |
Kojto | 111:4336505e4b1c | 213 | * and transmitter clocks needs to be closely matched. When receiving a frame |
Kojto | 111:4336505e4b1c | 214 | * that does not match the selected baudrate closely enough the receiver will |
Kojto | 111:4336505e4b1c | 215 | * be unable to synchronize the frame(s), and garbage transmissions will |
Kojto | 111:4336505e4b1c | 216 | * result. |
Kojto | 111:4336505e4b1c | 217 | * |
Kojto | 111:4336505e4b1c | 218 | * \subsection asfdoc_sam0_sercom_usart_parity Parity |
Kojto | 111:4336505e4b1c | 219 | * Parity can be enabled to detect if a transmission was in error. This is done |
Kojto | 111:4336505e4b1c | 220 | * by counting the number of "1" bits in the frame. When using Even parity the |
Kojto | 111:4336505e4b1c | 221 | * parity bit will be set if the total number of "1"s in the frame are an even |
Kojto | 111:4336505e4b1c | 222 | * number. If using Odd parity the parity bit will be set if the total number |
Kojto | 111:4336505e4b1c | 223 | * of "1"s are Odd. |
Kojto | 111:4336505e4b1c | 224 | * |
Kojto | 111:4336505e4b1c | 225 | * When receiving a character the receiver will count the number of "1"s in the |
Kojto | 111:4336505e4b1c | 226 | * frame and give an error if the received frame and parity bit disagree. |
Kojto | 111:4336505e4b1c | 227 | * |
Kojto | 111:4336505e4b1c | 228 | * \subsection asfdoc_sam0_sercom_usart_overview_pin_configuration GPIO Configuration |
Kojto | 111:4336505e4b1c | 229 | * |
Kojto | 111:4336505e4b1c | 230 | * The SERCOM module has four internal pads; the RX pin can be placed freely on |
Kojto | 111:4336505e4b1c | 231 | * any one of the four pads, and the TX and XCK pins have two predefined |
Kojto | 111:4336505e4b1c | 232 | * positions that can be selected as a pair. The pads can then be routed to an |
Kojto | 111:4336505e4b1c | 233 | * external GPIO pin using the normal pin multiplexing scheme on the SAM. |
Kojto | 111:4336505e4b1c | 234 | * |
Kojto | 111:4336505e4b1c | 235 | * \section asfdoc_sam0_sercom_usart_special_considerations Special Considerations |
Kojto | 111:4336505e4b1c | 236 | * |
Kojto | 111:4336505e4b1c | 237 | * \if USART_CALLBACK_MODE |
Kojto | 111:4336505e4b1c | 238 | * Never execute large portions of code in the callbacks. These |
Kojto | 111:4336505e4b1c | 239 | * are run from the interrupt routine, and thus having long callbacks will |
Kojto | 111:4336505e4b1c | 240 | * keep the processor in the interrupt handler for an equally long time. |
Kojto | 111:4336505e4b1c | 241 | * A common way to handle this is to use global flags signaling the |
Kojto | 111:4336505e4b1c | 242 | * main application that an interrupt event has happened, and only do the |
Kojto | 111:4336505e4b1c | 243 | * minimal needed processing in the callback. |
Kojto | 111:4336505e4b1c | 244 | * \else |
Kojto | 111:4336505e4b1c | 245 | * No special considerations. |
Kojto | 111:4336505e4b1c | 246 | * \endif |
Kojto | 111:4336505e4b1c | 247 | * |
Kojto | 111:4336505e4b1c | 248 | * \section asfdoc_sam0_sercom_usart_extra_info Extra Information |
Kojto | 111:4336505e4b1c | 249 | * |
Kojto | 111:4336505e4b1c | 250 | * For extra information, see \ref asfdoc_sam0_sercom_usart_extra. This includes: |
Kojto | 111:4336505e4b1c | 251 | * - \ref asfdoc_sam0_sercom_usart_extra_acronyms |
Kojto | 111:4336505e4b1c | 252 | * - \ref asfdoc_sam0_sercom_usart_extra_dependencies |
Kojto | 111:4336505e4b1c | 253 | * - \ref asfdoc_sam0_sercom_usart_extra_errata |
Kojto | 111:4336505e4b1c | 254 | * - \ref asfdoc_sam0_sercom_usart_extra_history |
Kojto | 111:4336505e4b1c | 255 | * |
Kojto | 111:4336505e4b1c | 256 | * \section asfdoc_sam0_sercom_usart_examples Examples |
Kojto | 111:4336505e4b1c | 257 | * |
Kojto | 111:4336505e4b1c | 258 | * For a list of examples related to this driver, see |
Kojto | 111:4336505e4b1c | 259 | * \ref asfdoc_sam0_sercom_usart_exqsg. |
Kojto | 111:4336505e4b1c | 260 | * |
Kojto | 111:4336505e4b1c | 261 | * \section asfdoc_sam0_sercom_usart_api_overview API Overview |
Kojto | 111:4336505e4b1c | 262 | * @{ |
Kojto | 111:4336505e4b1c | 263 | */ |
Kojto | 111:4336505e4b1c | 264 | |
Kojto | 111:4336505e4b1c | 265 | #include <compiler.h> |
Kojto | 111:4336505e4b1c | 266 | #include <sercom.h> |
Kojto | 111:4336505e4b1c | 267 | #include <pinmux.h> |
Kojto | 111:4336505e4b1c | 268 | |
Kojto | 111:4336505e4b1c | 269 | #if USART_CALLBACK_MODE == true |
Kojto | 111:4336505e4b1c | 270 | # include <sercom_interrupt.h> |
Kojto | 111:4336505e4b1c | 271 | #endif |
Kojto | 111:4336505e4b1c | 272 | |
Kojto | 111:4336505e4b1c | 273 | #ifdef __cplusplus |
Kojto | 111:4336505e4b1c | 274 | extern "C" { |
Kojto | 111:4336505e4b1c | 275 | #endif |
Kojto | 111:4336505e4b1c | 276 | |
Kojto | 111:4336505e4b1c | 277 | /** |
Kojto | 111:4336505e4b1c | 278 | * \name Driver Feature Definition |
Kojto | 111:4336505e4b1c | 279 | * Define SERCOM USART features set according to different device family. |
Kojto | 111:4336505e4b1c | 280 | * @{ |
Kojto | 111:4336505e4b1c | 281 | */ |
Kojto | 111:4336505e4b1c | 282 | #if (SAMD21) || (SAMR21) || (SAMD10) || (SAMD11) || (SAML21) || \ |
Kojto | 111:4336505e4b1c | 283 | (SAMDA1) || (SAMC20) || (SAMC21) || defined(__DOXYGEN__) |
Kojto | 111:4336505e4b1c | 284 | /** Usart sync scheme version 2. */ |
Kojto | 111:4336505e4b1c | 285 | # define FEATURE_USART_SYNC_SCHEME_V2 |
Kojto | 111:4336505e4b1c | 286 | /** Usart over sampling. */ |
Kojto | 111:4336505e4b1c | 287 | # define FEATURE_USART_OVER_SAMPLE |
Kojto | 111:4336505e4b1c | 288 | /** Usart hardware control flow. */ |
Kojto | 111:4336505e4b1c | 289 | # define FEATURE_USART_HARDWARE_FLOW_CONTROL |
Kojto | 111:4336505e4b1c | 290 | /** IrDA mode. */ |
Kojto | 111:4336505e4b1c | 291 | # define FEATURE_USART_IRDA |
Kojto | 111:4336505e4b1c | 292 | /** LIN slave mode. */ |
Kojto | 111:4336505e4b1c | 293 | # define FEATURE_USART_LIN_SLAVE |
Kojto | 111:4336505e4b1c | 294 | /** Usart collision detection. */ |
Kojto | 111:4336505e4b1c | 295 | # define FEATURE_USART_COLLISION_DECTION |
Kojto | 111:4336505e4b1c | 296 | /** Usart start frame detection. */ |
Kojto | 111:4336505e4b1c | 297 | # define FEATURE_USART_START_FRAME_DECTION |
Kojto | 111:4336505e4b1c | 298 | /** Usart start buffer overflow notification. */ |
Kojto | 111:4336505e4b1c | 299 | # define FEATURE_USART_IMMEDIATE_BUFFER_OVERFLOW_NOTIFICATION |
Kojto | 111:4336505e4b1c | 300 | #endif |
Kojto | 111:4336505e4b1c | 301 | |
Kojto | 111:4336505e4b1c | 302 | #if (SAMC20) || (SAMC21) || defined(__DOXYGEN__) |
Kojto | 111:4336505e4b1c | 303 | /** LIN master mode. */ |
Kojto | 111:4336505e4b1c | 304 | #define FEATURE_USART_LIN_MASTER |
Kojto | 111:4336505e4b1c | 305 | /** RS485 mode. */ |
Kojto | 111:4336505e4b1c | 306 | # define FEATURE_USART_RS485 |
Kojto | 111:4336505e4b1c | 307 | #endif |
Kojto | 111:4336505e4b1c | 308 | /*@}*/ |
Kojto | 111:4336505e4b1c | 309 | |
Kojto | 111:4336505e4b1c | 310 | #ifdef FEATURE_USART_LIN_MASTER |
Kojto | 111:4336505e4b1c | 311 | /** |
Kojto | 111:4336505e4b1c | 312 | * \brief LIN Node Type. |
Kojto | 111:4336505e4b1c | 313 | * |
Kojto | 111:4336505e4b1c | 314 | * LIN node type. |
Kojto | 111:4336505e4b1c | 315 | */ |
Kojto | 111:4336505e4b1c | 316 | enum lin_node_type { |
Kojto | 111:4336505e4b1c | 317 | /** LIN master mode */ |
Kojto | 111:4336505e4b1c | 318 | LIN_MASTER_NODE = SERCOM_USART_CTRLA_FORM(0x02), |
Kojto | 111:4336505e4b1c | 319 | /** LIN slave mode */ |
Kojto | 111:4336505e4b1c | 320 | LIN_SLAVE_NODE = SERCOM_USART_CTRLA_FORM(0x04), |
Kojto | 111:4336505e4b1c | 321 | /** Neither LIN master nor LIN slave mode */ |
Kojto | 111:4336505e4b1c | 322 | LIN_INVALID_MODE = SERCOM_USART_CTRLA_FORM(0x00), |
Kojto | 111:4336505e4b1c | 323 | }; |
Kojto | 111:4336505e4b1c | 324 | |
Kojto | 111:4336505e4b1c | 325 | /** |
Kojto | 111:4336505e4b1c | 326 | * \brief LIN Master Command Enum. |
Kojto | 111:4336505e4b1c | 327 | * |
Kojto | 111:4336505e4b1c | 328 | * LIN master command enum. |
Kojto | 111:4336505e4b1c | 329 | */ |
Kojto | 111:4336505e4b1c | 330 | enum lin_master_cmd { |
Kojto | 111:4336505e4b1c | 331 | /** LIN master software control transmission command */ |
Kojto | 111:4336505e4b1c | 332 | LIN_MASTER_SOFTWARE_CONTROL_TRANSMIT_CMD = SERCOM_USART_CTRLB_LINCMD(0x01), |
Kojto | 111:4336505e4b1c | 333 | /** LIN master automatically transmission command */ |
Kojto | 111:4336505e4b1c | 334 | LIN_MASTER_AUTO_TRANSMIT_CMD = SERCOM_USART_CTRLB_LINCMD(0x02), |
Kojto | 111:4336505e4b1c | 335 | }; |
Kojto | 111:4336505e4b1c | 336 | |
Kojto | 111:4336505e4b1c | 337 | /** |
Kojto | 111:4336505e4b1c | 338 | * \brief LIN Master Header Delay. |
Kojto | 111:4336505e4b1c | 339 | * |
Kojto | 111:4336505e4b1c | 340 | * LIN master header delay between break and sync transmission, |
Kojto | 111:4336505e4b1c | 341 | * and between the sync and identifier (ID) fields. |
Kojto | 111:4336505e4b1c | 342 | * This field is only valid when using automatically transmission command |
Kojto | 111:4336505e4b1c | 343 | */ |
Kojto | 111:4336505e4b1c | 344 | enum lin_master_header_delay { |
Kojto | 111:4336505e4b1c | 345 | /** Delay between break and sync transmission is 1 bit time. |
Kojto | 111:4336505e4b1c | 346 | Delay between sync and ID transmission is 1 bit time. */ |
Kojto | 111:4336505e4b1c | 347 | LIN_MASTER_HEADER_DELAY_0 = SERCOM_USART_CTRLC_HDRDLY(0x0), |
Kojto | 111:4336505e4b1c | 348 | /** Delay between break and sync transmission is 4 bit time. |
Kojto | 111:4336505e4b1c | 349 | Delay between sync and ID transmission is 4 bit time. */ |
Kojto | 111:4336505e4b1c | 350 | LIN_MASTER_HEADER_DELAY_1 = SERCOM_USART_CTRLC_HDRDLY(0x01), |
Kojto | 111:4336505e4b1c | 351 | /** Delay between break and sync transmission is 8 bit time. |
Kojto | 111:4336505e4b1c | 352 | Delay between sync and ID transmission is 4 bit time. */ |
Kojto | 111:4336505e4b1c | 353 | LIN_MASTER_HEADER_DELAY_2 = SERCOM_USART_CTRLC_HDRDLY(0x02), |
Kojto | 111:4336505e4b1c | 354 | /** Delay between break and sync transmission is 14 bit time. |
Kojto | 111:4336505e4b1c | 355 | Delay between sync and ID transmission is 4 bit time. */ |
Kojto | 111:4336505e4b1c | 356 | LIN_MASTER_HEADER_DELAY_3 = SERCOM_USART_CTRLC_HDRDLY(0x03), |
Kojto | 111:4336505e4b1c | 357 | }; |
Kojto | 111:4336505e4b1c | 358 | |
Kojto | 111:4336505e4b1c | 359 | /** |
Kojto | 111:4336505e4b1c | 360 | * \brief LIN Master Break Length. |
Kojto | 111:4336505e4b1c | 361 | * |
Kojto | 111:4336505e4b1c | 362 | * Length of the break field transmitted when in LIN master mode |
Kojto | 111:4336505e4b1c | 363 | */ |
Kojto | 111:4336505e4b1c | 364 | enum lin_master_break_length { |
Kojto | 111:4336505e4b1c | 365 | /** Break field transmission is 13 bit times. */ |
Kojto | 111:4336505e4b1c | 366 | LIN_MASTER_BREAK_LENGTH_13_BIT = SERCOM_USART_CTRLC_BRKLEN(0x0), |
Kojto | 111:4336505e4b1c | 367 | /** Break field transmission is 17 bit times. */ |
Kojto | 111:4336505e4b1c | 368 | LIN_MASTER_BREAK_LENGTH_17_BIT = SERCOM_USART_CTRLC_BRKLEN(0x1), |
Kojto | 111:4336505e4b1c | 369 | /** Break field transmission is 21 bit times. */ |
Kojto | 111:4336505e4b1c | 370 | LIN_MASTER_BREAK_LENGTH_21_BIT = SERCOM_USART_CTRLC_BRKLEN(0x2), |
Kojto | 111:4336505e4b1c | 371 | /** Break field transmission is 26 bit times. */ |
Kojto | 111:4336505e4b1c | 372 | LIN_MASTER_BREAK_LENGTH_26_BIT = SERCOM_USART_CTRLC_BRKLEN(0x3), |
Kojto | 111:4336505e4b1c | 373 | }; |
Kojto | 111:4336505e4b1c | 374 | #endif |
Kojto | 111:4336505e4b1c | 375 | |
Kojto | 111:4336505e4b1c | 376 | #ifndef PINMUX_DEFAULT |
Kojto | 111:4336505e4b1c | 377 | /** Default pinmux. */ |
Kojto | 111:4336505e4b1c | 378 | # define PINMUX_DEFAULT 0 |
Kojto | 111:4336505e4b1c | 379 | #endif |
Kojto | 111:4336505e4b1c | 380 | |
Kojto | 111:4336505e4b1c | 381 | #ifndef PINMUX_UNUSED |
Kojto | 111:4336505e4b1c | 382 | /** Unused pinmux. */ |
Kojto | 111:4336505e4b1c | 383 | # define PINMUX_UNUSED 0xFFFFFFFF |
Kojto | 111:4336505e4b1c | 384 | #endif |
Kojto | 111:4336505e4b1c | 385 | |
Kojto | 111:4336505e4b1c | 386 | #ifndef USART_TIMEOUT |
Kojto | 111:4336505e4b1c | 387 | /** USART timeout value. */ |
Kojto | 111:4336505e4b1c | 388 | # define USART_TIMEOUT 0xFFFF |
Kojto | 111:4336505e4b1c | 389 | #endif |
Kojto | 111:4336505e4b1c | 390 | |
Kojto | 111:4336505e4b1c | 391 | #if USART_CALLBACK_MODE == true |
Kojto | 111:4336505e4b1c | 392 | /** |
Kojto | 111:4336505e4b1c | 393 | * \brief USART Callback enum |
Kojto | 111:4336505e4b1c | 394 | * |
Kojto | 111:4336505e4b1c | 395 | * Callbacks for the Asynchronous USART driver. |
Kojto | 111:4336505e4b1c | 396 | */ |
Kojto | 111:4336505e4b1c | 397 | enum usart_callback { |
Kojto | 111:4336505e4b1c | 398 | /** Callback for buffer transmitted. */ |
Kojto | 111:4336505e4b1c | 399 | USART_CALLBACK_BUFFER_TRANSMITTED, |
Kojto | 111:4336505e4b1c | 400 | /** Callback for buffer received. */ |
Kojto | 111:4336505e4b1c | 401 | USART_CALLBACK_BUFFER_RECEIVED, |
Kojto | 111:4336505e4b1c | 402 | /** Callback for error. */ |
Kojto | 111:4336505e4b1c | 403 | USART_CALLBACK_ERROR, |
Kojto | 111:4336505e4b1c | 404 | #ifdef FEATURE_USART_LIN_SLAVE |
Kojto | 111:4336505e4b1c | 405 | /** Callback for break character is received. */ |
Kojto | 111:4336505e4b1c | 406 | USART_CALLBACK_BREAK_RECEIVED, |
Kojto | 111:4336505e4b1c | 407 | #endif |
Kojto | 111:4336505e4b1c | 408 | #ifdef FEATURE_USART_HARDWARE_FLOW_CONTROL |
Kojto | 111:4336505e4b1c | 409 | /** Callback for a change is detected on the CTS pin. */ |
Kojto | 111:4336505e4b1c | 410 | USART_CALLBACK_CTS_INPUT_CHANGE, |
Kojto | 111:4336505e4b1c | 411 | #endif |
Kojto | 111:4336505e4b1c | 412 | #ifdef FEATURE_USART_START_FRAME_DECTION |
Kojto | 111:4336505e4b1c | 413 | /** Callback for a start condition is detected on the RxD line. */ |
Kojto | 111:4336505e4b1c | 414 | USART_CALLBACK_START_RECEIVED, |
Kojto | 111:4336505e4b1c | 415 | #endif |
Kojto | 111:4336505e4b1c | 416 | # if !defined(__DOXYGEN__) |
Kojto | 111:4336505e4b1c | 417 | /** Number of available callbacks. */ |
Kojto | 111:4336505e4b1c | 418 | USART_CALLBACK_N, |
Kojto | 111:4336505e4b1c | 419 | # endif |
Kojto | 111:4336505e4b1c | 420 | }; |
Kojto | 111:4336505e4b1c | 421 | #endif |
Kojto | 111:4336505e4b1c | 422 | |
Kojto | 111:4336505e4b1c | 423 | /** |
Kojto | 111:4336505e4b1c | 424 | * \brief USART Data Order enum |
Kojto | 111:4336505e4b1c | 425 | * |
Kojto | 111:4336505e4b1c | 426 | * The data order decides which of MSB or LSB is shifted out first when data is |
Kojto | 111:4336505e4b1c | 427 | * transferred. |
Kojto | 111:4336505e4b1c | 428 | */ |
Kojto | 111:4336505e4b1c | 429 | enum usart_dataorder { |
Kojto | 111:4336505e4b1c | 430 | /** The MSB will be shifted out first during transmission, |
Kojto | 111:4336505e4b1c | 431 | * and shifted in first during reception. */ |
Kojto | 111:4336505e4b1c | 432 | USART_DATAORDER_MSB = 0, |
Kojto | 111:4336505e4b1c | 433 | /** The LSB will be shifted out first during transmission, |
Kojto | 111:4336505e4b1c | 434 | * and shifted in first during reception. */ |
Kojto | 111:4336505e4b1c | 435 | USART_DATAORDER_LSB = SERCOM_USART_CTRLA_DORD, |
Kojto | 111:4336505e4b1c | 436 | }; |
Kojto | 111:4336505e4b1c | 437 | |
Kojto | 111:4336505e4b1c | 438 | /** |
Kojto | 111:4336505e4b1c | 439 | * \brief USART Transfer mode enum |
Kojto | 111:4336505e4b1c | 440 | * |
Kojto | 111:4336505e4b1c | 441 | * Select USART transfer mode. |
Kojto | 111:4336505e4b1c | 442 | */ |
Kojto | 111:4336505e4b1c | 443 | enum usart_transfer_mode { |
Kojto | 111:4336505e4b1c | 444 | /** Transfer of data is done synchronously. */ |
Kojto | 111:4336505e4b1c | 445 | USART_TRANSFER_SYNCHRONOUSLY = (SERCOM_USART_CTRLA_CMODE), |
Kojto | 111:4336505e4b1c | 446 | /** Transfer of data is done asynchronously. */ |
Kojto | 111:4336505e4b1c | 447 | USART_TRANSFER_ASYNCHRONOUSLY = 0 |
Kojto | 111:4336505e4b1c | 448 | }; |
Kojto | 111:4336505e4b1c | 449 | |
Kojto | 111:4336505e4b1c | 450 | /** |
Kojto | 111:4336505e4b1c | 451 | * \brief USART Parity enum |
Kojto | 111:4336505e4b1c | 452 | * |
Kojto | 111:4336505e4b1c | 453 | * Select parity USART parity mode. |
Kojto | 111:4336505e4b1c | 454 | */ |
Kojto | 111:4336505e4b1c | 455 | enum usart_parity { |
Kojto | 111:4336505e4b1c | 456 | /** For odd parity checking, the parity bit will be set if number of |
Kojto | 111:4336505e4b1c | 457 | * ones being transferred is even. */ |
Kojto | 111:4336505e4b1c | 458 | USART_PARITY_ODD = SERCOM_USART_CTRLB_PMODE, |
Kojto | 111:4336505e4b1c | 459 | |
Kojto | 111:4336505e4b1c | 460 | /** For even parity checking, the parity bit will be set if number of |
Kojto | 111:4336505e4b1c | 461 | * ones being received is odd. */ |
Kojto | 111:4336505e4b1c | 462 | USART_PARITY_EVEN = 0, |
Kojto | 111:4336505e4b1c | 463 | |
Kojto | 111:4336505e4b1c | 464 | /** No parity checking will be executed, and there will be no parity bit |
Kojto | 111:4336505e4b1c | 465 | * in the received frame. */ |
Kojto | 111:4336505e4b1c | 466 | USART_PARITY_NONE = 0xFF, |
Kojto | 111:4336505e4b1c | 467 | }; |
Kojto | 111:4336505e4b1c | 468 | |
Kojto | 111:4336505e4b1c | 469 | /** |
Kojto | 111:4336505e4b1c | 470 | * \brief USART signal MUX settings |
Kojto | 111:4336505e4b1c | 471 | * |
Kojto | 111:4336505e4b1c | 472 | * Set the functionality of the SERCOM pins. |
Kojto | 111:4336505e4b1c | 473 | * |
Kojto | 111:4336505e4b1c | 474 | * See \ref asfdoc_sam0_sercom_usart_mux_settings for a description of the |
Kojto | 111:4336505e4b1c | 475 | * various MUX setting options. |
Kojto | 111:4336505e4b1c | 476 | */ |
Kojto | 111:4336505e4b1c | 477 | enum usart_signal_mux_settings { |
Kojto | 111:4336505e4b1c | 478 | #ifdef FEATURE_USART_HARDWARE_FLOW_CONTROL |
Kojto | 111:4336505e4b1c | 479 | /** MUX setting RX_0_TX_0_XCK_1. */ |
Kojto | 111:4336505e4b1c | 480 | USART_RX_0_TX_0_XCK_1 = (SERCOM_USART_CTRLA_RXPO(0) | SERCOM_USART_CTRLA_TXPO(0)), |
Kojto | 111:4336505e4b1c | 481 | /** MUX setting RX_0_TX_2_XCK_3. */ |
Kojto | 111:4336505e4b1c | 482 | USART_RX_0_TX_2_XCK_3 = (SERCOM_USART_CTRLA_RXPO(0) | SERCOM_USART_CTRLA_TXPO(1)), |
Kojto | 111:4336505e4b1c | 483 | /** MUX setting USART_RX_0_TX_0_RTS_2_CTS_3. */ |
Kojto | 111:4336505e4b1c | 484 | USART_RX_0_TX_0_RTS_2_CTS_3 = (SERCOM_USART_CTRLA_RXPO(0) | SERCOM_USART_CTRLA_TXPO(2)), |
Kojto | 111:4336505e4b1c | 485 | /** MUX setting RX_1_TX_0_XCK_1. */ |
Kojto | 111:4336505e4b1c | 486 | USART_RX_1_TX_0_XCK_1 = (SERCOM_USART_CTRLA_RXPO(1) | SERCOM_USART_CTRLA_TXPO(0)), |
Kojto | 111:4336505e4b1c | 487 | /** MUX setting RX_1_TX_2_XCK_3. */ |
Kojto | 111:4336505e4b1c | 488 | USART_RX_1_TX_2_XCK_3 = (SERCOM_USART_CTRLA_RXPO(1) | SERCOM_USART_CTRLA_TXPO(1)), |
Kojto | 111:4336505e4b1c | 489 | /** MUX setting USART_RX_1_TX_0_RTS_2_CTS_3. */ |
Kojto | 111:4336505e4b1c | 490 | USART_RX_1_TX_0_RTS_2_CTS_3 = (SERCOM_USART_CTRLA_RXPO(1) | SERCOM_USART_CTRLA_TXPO(2)), |
Kojto | 111:4336505e4b1c | 491 | /** MUX setting RX_2_TX_0_XCK_1. */ |
Kojto | 111:4336505e4b1c | 492 | USART_RX_2_TX_0_XCK_1 = (SERCOM_USART_CTRLA_RXPO(2) | SERCOM_USART_CTRLA_TXPO(0)), |
Kojto | 111:4336505e4b1c | 493 | /** MUX setting RX_2_TX_2_XCK_3. */ |
Kojto | 111:4336505e4b1c | 494 | USART_RX_2_TX_2_XCK_3 = (SERCOM_USART_CTRLA_RXPO(2) | SERCOM_USART_CTRLA_TXPO(1)), |
Kojto | 111:4336505e4b1c | 495 | /** MUX setting USART_RX_2_TX_0_RTS_2_CTS_3. */ |
Kojto | 111:4336505e4b1c | 496 | USART_RX_2_TX_0_RTS_2_CTS_3 = (SERCOM_USART_CTRLA_RXPO(2) | SERCOM_USART_CTRLA_TXPO(2)), |
Kojto | 111:4336505e4b1c | 497 | /** MUX setting RX_3_TX_0_XCK_1. */ |
Kojto | 111:4336505e4b1c | 498 | USART_RX_3_TX_0_XCK_1 = (SERCOM_USART_CTRLA_RXPO(3) | SERCOM_USART_CTRLA_TXPO(0)), |
Kojto | 111:4336505e4b1c | 499 | /** MUX setting RX_3_TX_2_XCK_3. */ |
Kojto | 111:4336505e4b1c | 500 | USART_RX_3_TX_2_XCK_3 = (SERCOM_USART_CTRLA_RXPO(3) | SERCOM_USART_CTRLA_TXPO(1)), |
Kojto | 111:4336505e4b1c | 501 | /** MUX setting USART_RX_3_TX_0_RTS_2_CTS_3. */ |
Kojto | 111:4336505e4b1c | 502 | USART_RX_3_TX_0_RTS_2_CTS_3 = (SERCOM_USART_CTRLA_RXPO(3) | SERCOM_USART_CTRLA_TXPO(2)), |
Kojto | 111:4336505e4b1c | 503 | #ifdef FEATURE_USART_RS485 |
Kojto | 111:4336505e4b1c | 504 | /** MUX setting USART_RX_0_TX_0_XCK_1_TE_2. */ |
Kojto | 111:4336505e4b1c | 505 | USART_RX_0_TX_0_XCK_1_TE_2 = (SERCOM_USART_CTRLA_RXPO(0) | SERCOM_USART_CTRLA_TXPO(3)), |
Kojto | 111:4336505e4b1c | 506 | /** MUX setting USART_RX_1_TX_0_XCK_1_TE_2. */ |
Kojto | 111:4336505e4b1c | 507 | USART_RX_1_TX_0_XCK_1_TE_2 = (SERCOM_USART_CTRLA_RXPO(1) | SERCOM_USART_CTRLA_TXPO(3)), |
Kojto | 111:4336505e4b1c | 508 | /** MUX setting USART_RX_2_TX_0_XCK_1_TE_2. */ |
Kojto | 111:4336505e4b1c | 509 | USART_RX_2_TX_0_XCK_1_TE_2 = (SERCOM_USART_CTRLA_RXPO(2) | SERCOM_USART_CTRLA_TXPO(3)), |
Kojto | 111:4336505e4b1c | 510 | /** MUX setting USART_RX_3_TX_0_XCK_1_TE_2. */ |
Kojto | 111:4336505e4b1c | 511 | USART_RX_3_TX_0_XCK_1_TE_2 = (SERCOM_USART_CTRLA_RXPO(3) | SERCOM_USART_CTRLA_TXPO(3)), |
Kojto | 111:4336505e4b1c | 512 | #endif |
Kojto | 111:4336505e4b1c | 513 | #else |
Kojto | 111:4336505e4b1c | 514 | /** MUX setting RX_0_TX_0_XCK_1. */ |
Kojto | 111:4336505e4b1c | 515 | USART_RX_0_TX_0_XCK_1 = (SERCOM_USART_CTRLA_RXPO(0)), |
Kojto | 111:4336505e4b1c | 516 | /** MUX setting RX_0_TX_2_XCK_3. */ |
Kojto | 111:4336505e4b1c | 517 | USART_RX_0_TX_2_XCK_3 = (SERCOM_USART_CTRLA_RXPO(0) | SERCOM_USART_CTRLA_TXPO), |
Kojto | 111:4336505e4b1c | 518 | /** MUX setting RX_1_TX_0_XCK_1. */ |
Kojto | 111:4336505e4b1c | 519 | USART_RX_1_TX_0_XCK_1 = (SERCOM_USART_CTRLA_RXPO(1)), |
Kojto | 111:4336505e4b1c | 520 | /** MUX setting RX_1_TX_2_XCK_3. */ |
Kojto | 111:4336505e4b1c | 521 | USART_RX_1_TX_2_XCK_3 = (SERCOM_USART_CTRLA_RXPO(1) | SERCOM_USART_CTRLA_TXPO), |
Kojto | 111:4336505e4b1c | 522 | /** MUX setting RX_2_TX_0_XCK_1. */ |
Kojto | 111:4336505e4b1c | 523 | USART_RX_2_TX_0_XCK_1 = (SERCOM_USART_CTRLA_RXPO(2)), |
Kojto | 111:4336505e4b1c | 524 | /** MUX setting RX_2_TX_2_XCK_3. */ |
Kojto | 111:4336505e4b1c | 525 | USART_RX_2_TX_2_XCK_3 = (SERCOM_USART_CTRLA_RXPO(2) | SERCOM_USART_CTRLA_TXPO), |
Kojto | 111:4336505e4b1c | 526 | /** MUX setting RX_3_TX_0_XCK_1. */ |
Kojto | 111:4336505e4b1c | 527 | USART_RX_3_TX_0_XCK_1 = (SERCOM_USART_CTRLA_RXPO(3)), |
Kojto | 111:4336505e4b1c | 528 | /** MUX setting RX_3_TX_2_XCK_3. */ |
Kojto | 111:4336505e4b1c | 529 | USART_RX_3_TX_2_XCK_3 = (SERCOM_USART_CTRLA_RXPO(3) | SERCOM_USART_CTRLA_TXPO), |
Kojto | 111:4336505e4b1c | 530 | #endif |
Kojto | 111:4336505e4b1c | 531 | }; |
Kojto | 111:4336505e4b1c | 532 | |
Kojto | 111:4336505e4b1c | 533 | /** |
Kojto | 111:4336505e4b1c | 534 | * \brief USART Stop Bits enum |
Kojto | 111:4336505e4b1c | 535 | * |
Kojto | 111:4336505e4b1c | 536 | * Number of stop bits for a frame. |
Kojto | 111:4336505e4b1c | 537 | */ |
Kojto | 111:4336505e4b1c | 538 | enum usart_stopbits { |
Kojto | 111:4336505e4b1c | 539 | /** Each transferred frame contains one stop bit. */ |
Kojto | 111:4336505e4b1c | 540 | USART_STOPBITS_1 = 0, |
Kojto | 111:4336505e4b1c | 541 | /** Each transferred frame contains two stop bits. */ |
Kojto | 111:4336505e4b1c | 542 | USART_STOPBITS_2 = SERCOM_USART_CTRLB_SBMODE, |
Kojto | 111:4336505e4b1c | 543 | }; |
Kojto | 111:4336505e4b1c | 544 | |
Kojto | 111:4336505e4b1c | 545 | /** |
Kojto | 111:4336505e4b1c | 546 | * \brief USART Character Size |
Kojto | 111:4336505e4b1c | 547 | * |
Kojto | 111:4336505e4b1c | 548 | * Number of bits for the character sent in a frame. |
Kojto | 111:4336505e4b1c | 549 | */ |
Kojto | 111:4336505e4b1c | 550 | enum usart_character_size { |
Kojto | 111:4336505e4b1c | 551 | /** The char being sent in a frame is five bits long. */ |
Kojto | 111:4336505e4b1c | 552 | USART_CHARACTER_SIZE_5BIT = SERCOM_USART_CTRLB_CHSIZE(5), |
Kojto | 111:4336505e4b1c | 553 | /** The char being sent in a frame is six bits long. */ |
Kojto | 111:4336505e4b1c | 554 | USART_CHARACTER_SIZE_6BIT = SERCOM_USART_CTRLB_CHSIZE(6), |
Kojto | 111:4336505e4b1c | 555 | /** The char being sent in a frame is seven bits long. */ |
Kojto | 111:4336505e4b1c | 556 | USART_CHARACTER_SIZE_7BIT = SERCOM_USART_CTRLB_CHSIZE(7), |
Kojto | 111:4336505e4b1c | 557 | /** The char being sent in a frame is eight bits long. */ |
Kojto | 111:4336505e4b1c | 558 | USART_CHARACTER_SIZE_8BIT = SERCOM_USART_CTRLB_CHSIZE(0), |
Kojto | 111:4336505e4b1c | 559 | /** The char being sent in a frame is nine bits long. */ |
Kojto | 111:4336505e4b1c | 560 | USART_CHARACTER_SIZE_9BIT = SERCOM_USART_CTRLB_CHSIZE(1), |
Kojto | 111:4336505e4b1c | 561 | }; |
Kojto | 111:4336505e4b1c | 562 | |
Kojto | 111:4336505e4b1c | 563 | #ifdef FEATURE_USART_OVER_SAMPLE |
Kojto | 111:4336505e4b1c | 564 | /** |
Kojto | 111:4336505e4b1c | 565 | * \brief USART Sample Rate |
Kojto | 111:4336505e4b1c | 566 | * |
Kojto | 111:4336505e4b1c | 567 | * The value of sample rate and baudrate generation mode. |
Kojto | 111:4336505e4b1c | 568 | */ |
Kojto | 111:4336505e4b1c | 569 | enum usart_sample_rate { |
Kojto | 111:4336505e4b1c | 570 | /** 16x over-sampling using arithmetic baudrate generation. */ |
Kojto | 111:4336505e4b1c | 571 | USART_SAMPLE_RATE_16X_ARITHMETIC = SERCOM_USART_CTRLA_SAMPR(0), |
Kojto | 111:4336505e4b1c | 572 | /** 16x over-sampling using fractional baudrate generation. */ |
Kojto | 111:4336505e4b1c | 573 | USART_SAMPLE_RATE_16X_FRACTIONAL = SERCOM_USART_CTRLA_SAMPR(1), |
Kojto | 111:4336505e4b1c | 574 | /** 8x over-sampling using arithmetic baudrate generation. */ |
Kojto | 111:4336505e4b1c | 575 | USART_SAMPLE_RATE_8X_ARITHMETIC = SERCOM_USART_CTRLA_SAMPR(2), |
Kojto | 111:4336505e4b1c | 576 | /** 8x over-sampling using fractional baudrate generation. */ |
Kojto | 111:4336505e4b1c | 577 | USART_SAMPLE_RATE_8X_FRACTIONAL = SERCOM_USART_CTRLA_SAMPR(3), |
Kojto | 111:4336505e4b1c | 578 | /** 3x over-sampling using arithmetic baudrate generation. */ |
Kojto | 111:4336505e4b1c | 579 | USART_SAMPLE_RATE_3X_ARITHMETIC = SERCOM_USART_CTRLA_SAMPR(4), |
Kojto | 111:4336505e4b1c | 580 | }; |
Kojto | 111:4336505e4b1c | 581 | |
Kojto | 111:4336505e4b1c | 582 | /** |
Kojto | 111:4336505e4b1c | 583 | * \brief USART Sample Adjustment |
Kojto | 111:4336505e4b1c | 584 | * |
Kojto | 111:4336505e4b1c | 585 | * The value of sample number used for majority voting. |
Kojto | 111:4336505e4b1c | 586 | */ |
Kojto | 111:4336505e4b1c | 587 | enum usart_sample_adjustment { |
Kojto | 111:4336505e4b1c | 588 | /** The first, middle and last sample number used for majority voting is 7-8-9. */ |
Kojto | 111:4336505e4b1c | 589 | USART_SAMPLE_ADJUSTMENT_7_8_9 = SERCOM_USART_CTRLA_SAMPA(0), |
Kojto | 111:4336505e4b1c | 590 | /** The first, middle and last sample number used for majority voting is 9-10-11. */ |
Kojto | 111:4336505e4b1c | 591 | USART_SAMPLE_ADJUSTMENT_9_10_11 = SERCOM_USART_CTRLA_SAMPA(1), |
Kojto | 111:4336505e4b1c | 592 | /** The first, middle and last sample number used for majority voting is 11-12-13. */ |
Kojto | 111:4336505e4b1c | 593 | USART_SAMPLE_ADJUSTMENT_11_12_13 = SERCOM_USART_CTRLA_SAMPA(2), |
Kojto | 111:4336505e4b1c | 594 | /** The first, middle and last sample number used for majority voting is 13-14-15. */ |
Kojto | 111:4336505e4b1c | 595 | USART_SAMPLE_ADJUSTMENT_13_14_15 = SERCOM_USART_CTRLA_SAMPA(3), |
Kojto | 111:4336505e4b1c | 596 | }; |
Kojto | 111:4336505e4b1c | 597 | #endif |
Kojto | 111:4336505e4b1c | 598 | |
Kojto | 111:4336505e4b1c | 599 | #ifdef FEATURE_USART_RS485 |
Kojto | 111:4336505e4b1c | 600 | /** |
Kojto | 111:4336505e4b1c | 601 | * \brief RS485 Guard Time |
Kojto | 111:4336505e4b1c | 602 | * |
Kojto | 111:4336505e4b1c | 603 | * The value of RS485 guard time. |
Kojto | 111:4336505e4b1c | 604 | */ |
Kojto | 111:4336505e4b1c | 605 | enum rs485_guard_time { |
Kojto | 111:4336505e4b1c | 606 | /** The guard time is 0-bit time. */ |
Kojto | 111:4336505e4b1c | 607 | RS485_GUARD_TIME_0_BIT = 0, |
Kojto | 111:4336505e4b1c | 608 | /** The guard time is 1-bit time. */ |
Kojto | 111:4336505e4b1c | 609 | RS485_GUARD_TIME_1_BIT, |
Kojto | 111:4336505e4b1c | 610 | /** The guard time is 2-bit times. */ |
Kojto | 111:4336505e4b1c | 611 | RS485_GUARD_TIME_2_BIT, |
Kojto | 111:4336505e4b1c | 612 | /** The guard time is 3-bit times. */ |
Kojto | 111:4336505e4b1c | 613 | RS485_GUARD_TIME_3_BIT, |
Kojto | 111:4336505e4b1c | 614 | /** The guard time is 4-bit times. */ |
Kojto | 111:4336505e4b1c | 615 | RS485_GUARD_TIME_4_BIT, |
Kojto | 111:4336505e4b1c | 616 | /** The guard time is 5-bit times. */ |
Kojto | 111:4336505e4b1c | 617 | RS485_GUARD_TIME_5_BIT, |
Kojto | 111:4336505e4b1c | 618 | /** The guard time is 6-bit times. */ |
Kojto | 111:4336505e4b1c | 619 | RS485_GUARD_TIME_6_BIT, |
Kojto | 111:4336505e4b1c | 620 | /** The guard time is 7-bit times. */ |
Kojto | 111:4336505e4b1c | 621 | RS485_GUARD_TIME_7_BIT, |
Kojto | 111:4336505e4b1c | 622 | }; |
Kojto | 111:4336505e4b1c | 623 | #endif |
Kojto | 111:4336505e4b1c | 624 | |
Kojto | 111:4336505e4b1c | 625 | /** |
Kojto | 111:4336505e4b1c | 626 | * \brief USART Transceiver |
Kojto | 111:4336505e4b1c | 627 | * |
Kojto | 111:4336505e4b1c | 628 | * Select Receiver or Transmitter. |
Kojto | 111:4336505e4b1c | 629 | */ |
Kojto | 111:4336505e4b1c | 630 | enum usart_transceiver_type { |
Kojto | 111:4336505e4b1c | 631 | /** The parameter is for the Receiver. */ |
Kojto | 111:4336505e4b1c | 632 | USART_TRANSCEIVER_RX, |
Kojto | 111:4336505e4b1c | 633 | /** The parameter is for the Transmitter. */ |
Kojto | 111:4336505e4b1c | 634 | USART_TRANSCEIVER_TX, |
Kojto | 111:4336505e4b1c | 635 | }; |
Kojto | 111:4336505e4b1c | 636 | |
Kojto | 111:4336505e4b1c | 637 | /** |
Kojto | 111:4336505e4b1c | 638 | * \brief USART configuration struct |
Kojto | 111:4336505e4b1c | 639 | * |
Kojto | 111:4336505e4b1c | 640 | * Configuration options for USART. |
Kojto | 111:4336505e4b1c | 641 | */ |
Kojto | 111:4336505e4b1c | 642 | struct usart_config { |
Kojto | 111:4336505e4b1c | 643 | /** USART bit order (MSB or LSB first). */ |
Kojto | 111:4336505e4b1c | 644 | enum usart_dataorder data_order; |
Kojto | 111:4336505e4b1c | 645 | /** USART in asynchronous or synchronous mode. */ |
Kojto | 111:4336505e4b1c | 646 | enum usart_transfer_mode transfer_mode; |
Kojto | 111:4336505e4b1c | 647 | /** USART parity. */ |
Kojto | 111:4336505e4b1c | 648 | enum usart_parity parity; |
Kojto | 111:4336505e4b1c | 649 | /** Number of stop bits. */ |
Kojto | 111:4336505e4b1c | 650 | enum usart_stopbits stopbits; |
Kojto | 111:4336505e4b1c | 651 | /** USART character size. */ |
Kojto | 111:4336505e4b1c | 652 | enum usart_character_size character_size; |
Kojto | 111:4336505e4b1c | 653 | /** USART pin out. */ |
Kojto | 111:4336505e4b1c | 654 | enum usart_signal_mux_settings mux_setting; |
Kojto | 111:4336505e4b1c | 655 | #ifdef FEATURE_USART_OVER_SAMPLE |
Kojto | 111:4336505e4b1c | 656 | /** USART sample rate. */ |
Kojto | 111:4336505e4b1c | 657 | enum usart_sample_rate sample_rate; |
Kojto | 111:4336505e4b1c | 658 | /** USART sample adjustment. */ |
Kojto | 111:4336505e4b1c | 659 | enum usart_sample_adjustment sample_adjustment; |
Kojto | 111:4336505e4b1c | 660 | #endif |
Kojto | 111:4336505e4b1c | 661 | #ifdef FEATURE_USART_IMMEDIATE_BUFFER_OVERFLOW_NOTIFICATION |
Kojto | 111:4336505e4b1c | 662 | /** Controls when the buffer overflow status bit is asserted when a buffer overflow occurs.*/ |
Kojto | 111:4336505e4b1c | 663 | bool immediate_buffer_overflow_notification; |
Kojto | 111:4336505e4b1c | 664 | #endif |
Kojto | 111:4336505e4b1c | 665 | #ifdef FEATURE_USART_IRDA |
Kojto | 111:4336505e4b1c | 666 | /** Enable IrDA encoding format. */ |
Kojto | 111:4336505e4b1c | 667 | bool encoding_format_enable; |
Kojto | 111:4336505e4b1c | 668 | /** The minimum pulse length that is required for a pulse to be accepted by the IrDA receiver. */ |
Kojto | 111:4336505e4b1c | 669 | uint8_t receive_pulse_length; |
Kojto | 111:4336505e4b1c | 670 | #endif |
Kojto | 111:4336505e4b1c | 671 | #ifdef FEATURE_USART_LIN_SLAVE |
Kojto | 111:4336505e4b1c | 672 | /** Enable LIN Slave Support. */ |
Kojto | 111:4336505e4b1c | 673 | bool lin_slave_enable; |
Kojto | 111:4336505e4b1c | 674 | #endif |
Kojto | 111:4336505e4b1c | 675 | |
Kojto | 111:4336505e4b1c | 676 | #ifdef FEATURE_USART_LIN_MASTER |
Kojto | 111:4336505e4b1c | 677 | /** LIN node type. */ |
Kojto | 111:4336505e4b1c | 678 | enum lin_node_type lin_node; |
Kojto | 111:4336505e4b1c | 679 | /** LIN master header delay. */ |
Kojto | 111:4336505e4b1c | 680 | enum lin_master_header_delay lin_header_delay; |
Kojto | 111:4336505e4b1c | 681 | /** LIN Master Break Length. */ |
Kojto | 111:4336505e4b1c | 682 | enum lin_master_break_length lin_break_length; |
Kojto | 111:4336505e4b1c | 683 | #endif |
Kojto | 111:4336505e4b1c | 684 | |
Kojto | 111:4336505e4b1c | 685 | #ifdef FEATURE_USART_START_FRAME_DECTION |
Kojto | 111:4336505e4b1c | 686 | /** Enable start of frame dection. */ |
Kojto | 111:4336505e4b1c | 687 | bool start_frame_detection_enable; |
Kojto | 111:4336505e4b1c | 688 | #endif |
Kojto | 111:4336505e4b1c | 689 | #ifdef FEATURE_USART_RS485 |
Kojto | 111:4336505e4b1c | 690 | /** RS485 guard time. */ |
Kojto | 111:4336505e4b1c | 691 | enum rs485_guard_time rs485_guard_time; |
Kojto | 111:4336505e4b1c | 692 | #endif |
Kojto | 111:4336505e4b1c | 693 | #ifdef FEATURE_USART_COLLISION_DECTION |
Kojto | 111:4336505e4b1c | 694 | /** Enable collision dection. */ |
Kojto | 111:4336505e4b1c | 695 | bool collision_detection_enable; |
Kojto | 111:4336505e4b1c | 696 | #endif |
Kojto | 111:4336505e4b1c | 697 | /** USART baudrate. */ |
Kojto | 111:4336505e4b1c | 698 | uint32_t baudrate; |
Kojto | 111:4336505e4b1c | 699 | /** Enable receiver. */ |
Kojto | 111:4336505e4b1c | 700 | bool receiver_enable; |
Kojto | 111:4336505e4b1c | 701 | /** Enable transmitter. */ |
Kojto | 111:4336505e4b1c | 702 | bool transmitter_enable; |
Kojto | 111:4336505e4b1c | 703 | |
Kojto | 111:4336505e4b1c | 704 | /** USART Clock Polarity. |
Kojto | 111:4336505e4b1c | 705 | * If true, data changes on falling XCK edge and |
Kojto | 111:4336505e4b1c | 706 | * is sampled at rising edge. |
Kojto | 111:4336505e4b1c | 707 | * If false, data changes on rising XCK edge and |
Kojto | 111:4336505e4b1c | 708 | * is sampled at falling edge. |
Kojto | 111:4336505e4b1c | 709 | * */ |
Kojto | 111:4336505e4b1c | 710 | bool clock_polarity_inverted; |
Kojto | 111:4336505e4b1c | 711 | |
Kojto | 111:4336505e4b1c | 712 | /** States whether to use the external clock applied to the XCK pin. |
Kojto | 111:4336505e4b1c | 713 | * In synchronous mode the shift register will act directly on the XCK clock. |
Kojto | 111:4336505e4b1c | 714 | * In asynchronous mode the XCK will be the input to the USART hardware module. |
Kojto | 111:4336505e4b1c | 715 | */ |
Kojto | 111:4336505e4b1c | 716 | bool use_external_clock; |
Kojto | 111:4336505e4b1c | 717 | /** External clock frequency in synchronous mode. |
Kojto | 111:4336505e4b1c | 718 | * This must be set if \c use_external_clock is true. */ |
Kojto | 111:4336505e4b1c | 719 | uint32_t ext_clock_freq; |
Kojto | 111:4336505e4b1c | 720 | /** If true the USART will be kept running in Standby sleep mode. */ |
Kojto | 111:4336505e4b1c | 721 | bool run_in_standby; |
Kojto | 111:4336505e4b1c | 722 | /** GCLK generator source. */ |
Kojto | 111:4336505e4b1c | 723 | enum gclk_generator generator_source; |
Kojto | 111:4336505e4b1c | 724 | /** PAD0 pinmux. |
Kojto | 111:4336505e4b1c | 725 | * |
Kojto | 111:4336505e4b1c | 726 | * If current USARTx has several alternative multiplexing I/O pin for PAD0, then |
Kojto | 111:4336505e4b1c | 727 | * only one peripheral multiplexing I/O can be enabled for current USARTx PAD0 |
Kojto | 111:4336505e4b1c | 728 | * function. Make sure other alternative multiplexing I/O associated current |
Kojto | 111:4336505e4b1c | 729 | * USARTx PAD0 is not setup usart function. |
Kojto | 111:4336505e4b1c | 730 | */ |
Kojto | 111:4336505e4b1c | 731 | uint32_t pinmux_pad0; |
Kojto | 111:4336505e4b1c | 732 | /** PAD1 pinmux. |
Kojto | 111:4336505e4b1c | 733 | * |
Kojto | 111:4336505e4b1c | 734 | * If current USARTx has several alternative multiplexing I/O pin for PAD1, then |
Kojto | 111:4336505e4b1c | 735 | * only one peripheral multiplexing I/O can be enabled for current USARTx PAD1 |
Kojto | 111:4336505e4b1c | 736 | * function. Make sure other alternative multiplexing I/O associated current |
Kojto | 111:4336505e4b1c | 737 | * USARTx PAD1 is not setup usart function. |
Kojto | 111:4336505e4b1c | 738 | */ |
Kojto | 111:4336505e4b1c | 739 | uint32_t pinmux_pad1; |
Kojto | 111:4336505e4b1c | 740 | /** PAD2 pinmux. |
Kojto | 111:4336505e4b1c | 741 | * |
Kojto | 111:4336505e4b1c | 742 | * If current USARTx has several alternative multiplexing I/O pin for PAD2, then |
Kojto | 111:4336505e4b1c | 743 | * only one peripheral multiplexing I/O can be enabled for current USARTx PAD2 |
Kojto | 111:4336505e4b1c | 744 | * function. Make sure other alternative multiplexing I/O associated current |
Kojto | 111:4336505e4b1c | 745 | * USARTx PAD2 is not setup usart function. |
Kojto | 111:4336505e4b1c | 746 | */ |
Kojto | 111:4336505e4b1c | 747 | uint32_t pinmux_pad2; |
Kojto | 111:4336505e4b1c | 748 | /** PAD3 pinmux. |
Kojto | 111:4336505e4b1c | 749 | * |
Kojto | 111:4336505e4b1c | 750 | * If current USARTx has several alternative multiplexing I/O pin for PAD3, then |
Kojto | 111:4336505e4b1c | 751 | * only one peripheral multiplexing I/O can be enabled for current USARTx PAD3 |
Kojto | 111:4336505e4b1c | 752 | * function. Make sure other alternative multiplexing I/O associated current |
Kojto | 111:4336505e4b1c | 753 | * USARTx PAD3 is not setup usart function. |
Kojto | 111:4336505e4b1c | 754 | */ |
Kojto | 111:4336505e4b1c | 755 | uint32_t pinmux_pad3; |
Kojto | 111:4336505e4b1c | 756 | }; |
Kojto | 111:4336505e4b1c | 757 | |
Kojto | 111:4336505e4b1c | 758 | #if USART_CALLBACK_MODE == true |
Kojto | 111:4336505e4b1c | 759 | /** |
Kojto | 111:4336505e4b1c | 760 | * \brief USART module instance |
Kojto | 111:4336505e4b1c | 761 | * |
Kojto | 111:4336505e4b1c | 762 | * Forward Declaration for the device instance. |
Kojto | 111:4336505e4b1c | 763 | */ |
Kojto | 111:4336505e4b1c | 764 | struct usart_module; |
Kojto | 111:4336505e4b1c | 765 | |
Kojto | 111:4336505e4b1c | 766 | /** |
Kojto | 111:4336505e4b1c | 767 | * \brief USART callback type |
Kojto | 111:4336505e4b1c | 768 | * |
Kojto | 111:4336505e4b1c | 769 | * Type of the callback functions. |
Kojto | 111:4336505e4b1c | 770 | */ |
Kojto | 111:4336505e4b1c | 771 | typedef void (*usart_callback_t)(struct usart_module *const module); |
Kojto | 111:4336505e4b1c | 772 | #endif |
Kojto | 111:4336505e4b1c | 773 | |
Kojto | 111:4336505e4b1c | 774 | /** |
Kojto | 111:4336505e4b1c | 775 | * \brief SERCOM USART driver software device instance structure. |
Kojto | 111:4336505e4b1c | 776 | * |
Kojto | 111:4336505e4b1c | 777 | * SERCOM USART driver software instance structure, used to retain software |
Kojto | 111:4336505e4b1c | 778 | * state information of an associated hardware module instance. |
Kojto | 111:4336505e4b1c | 779 | * |
Kojto | 111:4336505e4b1c | 780 | * \note The fields of this structure should not be altered by the user |
Kojto | 111:4336505e4b1c | 781 | * application; they are reserved for module-internal use only. |
Kojto | 111:4336505e4b1c | 782 | */ |
Kojto | 111:4336505e4b1c | 783 | struct usart_module { |
Kojto | 111:4336505e4b1c | 784 | #if !defined(__DOXYGEN__) |
Kojto | 111:4336505e4b1c | 785 | /** Pointer to the hardware instance. */ |
Kojto | 111:4336505e4b1c | 786 | Sercom *hw; |
Kojto | 111:4336505e4b1c | 787 | /** Module lock. */ |
Kojto | 111:4336505e4b1c | 788 | volatile bool locked; |
Kojto | 111:4336505e4b1c | 789 | /** Character size of the data being transferred. */ |
Kojto | 111:4336505e4b1c | 790 | enum usart_character_size character_size; |
Kojto | 111:4336505e4b1c | 791 | /** Receiver enabled. */ |
Kojto | 111:4336505e4b1c | 792 | bool receiver_enabled; |
Kojto | 111:4336505e4b1c | 793 | /** Transmitter enabled. */ |
Kojto | 111:4336505e4b1c | 794 | bool transmitter_enabled; |
Kojto | 111:4336505e4b1c | 795 | #ifdef FEATURE_USART_LIN_SLAVE |
Kojto | 111:4336505e4b1c | 796 | /** LIN Slave Support enabled. */ |
Kojto | 111:4336505e4b1c | 797 | bool lin_slave_enabled; |
Kojto | 111:4336505e4b1c | 798 | #endif |
Kojto | 111:4336505e4b1c | 799 | #ifdef FEATURE_USART_START_FRAME_DECTION |
Kojto | 111:4336505e4b1c | 800 | /** Start of frame dection enabled. */ |
Kojto | 111:4336505e4b1c | 801 | bool start_frame_detection_enabled; |
Kojto | 111:4336505e4b1c | 802 | #endif |
Kojto | 111:4336505e4b1c | 803 | # if USART_CALLBACK_MODE == true |
Kojto | 111:4336505e4b1c | 804 | /** Array to store callback function pointers in. */ |
Kojto | 111:4336505e4b1c | 805 | usart_callback_t callback[USART_CALLBACK_N]; |
Kojto | 111:4336505e4b1c | 806 | /** Buffer pointer to where the next received character will be put. */ |
Kojto | 111:4336505e4b1c | 807 | volatile uint8_t *rx_buffer_ptr; |
Kojto | 111:4336505e4b1c | 808 | |
Kojto | 111:4336505e4b1c | 809 | /** Buffer pointer to where the next character will be transmitted from. |
Kojto | 111:4336505e4b1c | 810 | **/ |
Kojto | 111:4336505e4b1c | 811 | volatile uint8_t *tx_buffer_ptr; |
Kojto | 111:4336505e4b1c | 812 | /** Remaining characters to receive. */ |
Kojto | 111:4336505e4b1c | 813 | volatile uint16_t remaining_rx_buffer_length; |
Kojto | 111:4336505e4b1c | 814 | /** Remaining characters to transmit. */ |
Kojto | 111:4336505e4b1c | 815 | volatile uint16_t remaining_tx_buffer_length; |
Kojto | 111:4336505e4b1c | 816 | /** Bit mask for callbacks registered. */ |
Kojto | 111:4336505e4b1c | 817 | uint8_t callback_reg_mask; |
Kojto | 111:4336505e4b1c | 818 | /** Bit mask for callbacks enabled. */ |
Kojto | 111:4336505e4b1c | 819 | uint8_t callback_enable_mask; |
Kojto | 111:4336505e4b1c | 820 | /** Holds the status of the ongoing or last read operation. */ |
Kojto | 111:4336505e4b1c | 821 | volatile enum status_code rx_status; |
Kojto | 111:4336505e4b1c | 822 | /** Holds the status of the ongoing or last write operation. */ |
Kojto | 111:4336505e4b1c | 823 | volatile enum status_code tx_status; |
Kojto | 111:4336505e4b1c | 824 | # endif |
Kojto | 111:4336505e4b1c | 825 | #endif |
Kojto | 111:4336505e4b1c | 826 | }; |
Kojto | 111:4336505e4b1c | 827 | |
Kojto | 111:4336505e4b1c | 828 | /** |
Kojto | 111:4336505e4b1c | 829 | * \name Lock/Unlock |
Kojto | 111:4336505e4b1c | 830 | * @{ |
Kojto | 111:4336505e4b1c | 831 | */ |
Kojto | 111:4336505e4b1c | 832 | |
Kojto | 111:4336505e4b1c | 833 | /** |
Kojto | 111:4336505e4b1c | 834 | * \brief Attempt to get lock on driver instance |
Kojto | 111:4336505e4b1c | 835 | * |
Kojto | 111:4336505e4b1c | 836 | * This function checks the instance's lock, which indicates whether or not it |
Kojto | 111:4336505e4b1c | 837 | * is currently in use, and sets the lock if it was not already set. |
Kojto | 111:4336505e4b1c | 838 | * |
Kojto | 111:4336505e4b1c | 839 | * The purpose of this is to enable exclusive access to driver instances, so |
Kojto | 111:4336505e4b1c | 840 | * that, e.g., transactions by different services will not interfere with each |
Kojto | 111:4336505e4b1c | 841 | * other. |
Kojto | 111:4336505e4b1c | 842 | * |
Kojto | 111:4336505e4b1c | 843 | * \param[in,out] module Pointer to the driver instance to lock |
Kojto | 111:4336505e4b1c | 844 | * |
Kojto | 111:4336505e4b1c | 845 | * \retval STATUS_OK If the module was locked |
Kojto | 111:4336505e4b1c | 846 | * \retval STATUS_BUSY If the module was already locked |
Kojto | 111:4336505e4b1c | 847 | */ |
Kojto | 111:4336505e4b1c | 848 | static inline enum status_code usart_lock( |
Kojto | 111:4336505e4b1c | 849 | struct usart_module *const module) |
Kojto | 111:4336505e4b1c | 850 | { |
Kojto | 111:4336505e4b1c | 851 | enum status_code status; |
Kojto | 111:4336505e4b1c | 852 | |
Kojto | 111:4336505e4b1c | 853 | system_interrupt_enter_critical_section(); |
Kojto | 111:4336505e4b1c | 854 | |
Kojto | 111:4336505e4b1c | 855 | if (module->locked) { |
Kojto | 111:4336505e4b1c | 856 | status = STATUS_BUSY; |
Kojto | 111:4336505e4b1c | 857 | } else { |
Kojto | 111:4336505e4b1c | 858 | module->locked = true; |
Kojto | 111:4336505e4b1c | 859 | status = STATUS_OK; |
Kojto | 111:4336505e4b1c | 860 | } |
Kojto | 111:4336505e4b1c | 861 | |
Kojto | 111:4336505e4b1c | 862 | system_interrupt_leave_critical_section(); |
Kojto | 111:4336505e4b1c | 863 | |
Kojto | 111:4336505e4b1c | 864 | return status; |
Kojto | 111:4336505e4b1c | 865 | } |
Kojto | 111:4336505e4b1c | 866 | |
Kojto | 111:4336505e4b1c | 867 | /** |
Kojto | 111:4336505e4b1c | 868 | * \brief Unlock driver instance |
Kojto | 111:4336505e4b1c | 869 | * |
Kojto | 111:4336505e4b1c | 870 | * This function clears the instance lock, indicating that it is available for |
Kojto | 111:4336505e4b1c | 871 | * use. |
Kojto | 111:4336505e4b1c | 872 | * |
Kojto | 111:4336505e4b1c | 873 | * \param[in,out] module Pointer to the driver instance to lock |
Kojto | 111:4336505e4b1c | 874 | * |
Kojto | 111:4336505e4b1c | 875 | */ |
Kojto | 111:4336505e4b1c | 876 | static inline void usart_unlock(struct usart_module *const module) |
Kojto | 111:4336505e4b1c | 877 | { |
Kojto | 111:4336505e4b1c | 878 | module->locked = false; |
Kojto | 111:4336505e4b1c | 879 | } |
Kojto | 111:4336505e4b1c | 880 | |
Kojto | 111:4336505e4b1c | 881 | /** @} */ |
Kojto | 111:4336505e4b1c | 882 | |
Kojto | 111:4336505e4b1c | 883 | /** |
Kojto | 111:4336505e4b1c | 884 | * \brief Check if peripheral is busy syncing registers across clock domains |
Kojto | 111:4336505e4b1c | 885 | * |
Kojto | 111:4336505e4b1c | 886 | * Return peripheral synchronization status. If doing a non-blocking |
Kojto | 111:4336505e4b1c | 887 | * implementation this function can be used to check the sync state and hold of |
Kojto | 111:4336505e4b1c | 888 | * any new actions until sync is complete. If this functions is not run; the |
Kojto | 111:4336505e4b1c | 889 | * functions will block until the sync has completed. |
Kojto | 111:4336505e4b1c | 890 | * |
Kojto | 111:4336505e4b1c | 891 | * \param[in] module Pointer to peripheral module |
Kojto | 111:4336505e4b1c | 892 | * |
Kojto | 111:4336505e4b1c | 893 | * \return Peripheral sync status. |
Kojto | 111:4336505e4b1c | 894 | * |
Kojto | 111:4336505e4b1c | 895 | * \retval true Peripheral is busy syncing |
Kojto | 111:4336505e4b1c | 896 | * \retval false Peripheral is not busy syncing and can be read/written without |
Kojto | 111:4336505e4b1c | 897 | * stalling the bus. |
Kojto | 111:4336505e4b1c | 898 | */ |
Kojto | 111:4336505e4b1c | 899 | static inline bool usart_is_syncing( |
Kojto | 111:4336505e4b1c | 900 | const struct usart_module *const module) |
Kojto | 111:4336505e4b1c | 901 | { |
Kojto | 111:4336505e4b1c | 902 | /* Sanity check arguments */ |
Kojto | 111:4336505e4b1c | 903 | Assert(module); |
Kojto | 111:4336505e4b1c | 904 | Assert(module->hw); |
Kojto | 111:4336505e4b1c | 905 | |
Kojto | 111:4336505e4b1c | 906 | SercomUsart *const usart_hw = &(module->hw->USART); |
Kojto | 111:4336505e4b1c | 907 | |
Kojto | 111:4336505e4b1c | 908 | #ifdef FEATURE_USART_SYNC_SCHEME_V2 |
Kojto | 111:4336505e4b1c | 909 | return (usart_hw->SYNCBUSY.reg); |
Kojto | 111:4336505e4b1c | 910 | #else |
Kojto | 111:4336505e4b1c | 911 | return (usart_hw->STATUS.reg & SERCOM_USART_STATUS_SYNCBUSY); |
Kojto | 111:4336505e4b1c | 912 | #endif |
Kojto | 111:4336505e4b1c | 913 | } |
Kojto | 111:4336505e4b1c | 914 | |
Kojto | 111:4336505e4b1c | 915 | #if !defined (__DOXYGEN__) |
Kojto | 111:4336505e4b1c | 916 | /** |
Kojto | 111:4336505e4b1c | 917 | * \internal |
Kojto | 111:4336505e4b1c | 918 | * Waits until synchronization is complete |
Kojto | 111:4336505e4b1c | 919 | */ |
Kojto | 111:4336505e4b1c | 920 | static inline void _usart_wait_for_sync( |
Kojto | 111:4336505e4b1c | 921 | const struct usart_module *const module) |
Kojto | 111:4336505e4b1c | 922 | { |
Kojto | 111:4336505e4b1c | 923 | /* Sanity check. */ |
Kojto | 111:4336505e4b1c | 924 | Assert(module); |
Kojto | 111:4336505e4b1c | 925 | |
Kojto | 111:4336505e4b1c | 926 | while (usart_is_syncing(module)) { |
Kojto | 111:4336505e4b1c | 927 | /* Wait until the synchronization is complete */ |
Kojto | 111:4336505e4b1c | 928 | } |
Kojto | 111:4336505e4b1c | 929 | } |
Kojto | 111:4336505e4b1c | 930 | #endif |
Kojto | 111:4336505e4b1c | 931 | |
Kojto | 111:4336505e4b1c | 932 | /** |
Kojto | 111:4336505e4b1c | 933 | * \brief Initializes the device to predefined defaults |
Kojto | 111:4336505e4b1c | 934 | * |
Kojto | 111:4336505e4b1c | 935 | * Initialize the USART device to predefined defaults: |
Kojto | 111:4336505e4b1c | 936 | * - 8-bit asynchronous USART |
Kojto | 111:4336505e4b1c | 937 | * - No parity |
Kojto | 111:4336505e4b1c | 938 | * - One stop bit |
Kojto | 111:4336505e4b1c | 939 | * - 9600 baud |
Kojto | 111:4336505e4b1c | 940 | * - Transmitter enabled |
Kojto | 111:4336505e4b1c | 941 | * - Receiver enabled |
Kojto | 111:4336505e4b1c | 942 | * - GCLK generator 0 as clock source |
Kojto | 111:4336505e4b1c | 943 | * - Default pin configuration |
Kojto | 111:4336505e4b1c | 944 | * |
Kojto | 111:4336505e4b1c | 945 | * The configuration struct will be updated with the default |
Kojto | 111:4336505e4b1c | 946 | * configuration. |
Kojto | 111:4336505e4b1c | 947 | * |
Kojto | 111:4336505e4b1c | 948 | * \param[in,out] config Pointer to configuration struct |
Kojto | 111:4336505e4b1c | 949 | */ |
Kojto | 111:4336505e4b1c | 950 | static inline void usart_get_config_defaults( |
Kojto | 111:4336505e4b1c | 951 | struct usart_config *const config) |
Kojto | 111:4336505e4b1c | 952 | { |
Kojto | 111:4336505e4b1c | 953 | /* Sanity check arguments */ |
Kojto | 111:4336505e4b1c | 954 | Assert(config); |
Kojto | 111:4336505e4b1c | 955 | |
Kojto | 111:4336505e4b1c | 956 | /* Set default config in the config struct */ |
Kojto | 111:4336505e4b1c | 957 | config->data_order = USART_DATAORDER_LSB; |
Kojto | 111:4336505e4b1c | 958 | config->transfer_mode = USART_TRANSFER_ASYNCHRONOUSLY; |
Kojto | 111:4336505e4b1c | 959 | config->parity = USART_PARITY_NONE; |
Kojto | 111:4336505e4b1c | 960 | config->stopbits = USART_STOPBITS_1; |
Kojto | 111:4336505e4b1c | 961 | config->character_size = USART_CHARACTER_SIZE_8BIT; |
Kojto | 111:4336505e4b1c | 962 | config->baudrate = 9600; |
Kojto | 111:4336505e4b1c | 963 | config->receiver_enable = true; |
Kojto | 111:4336505e4b1c | 964 | config->transmitter_enable = true; |
Kojto | 111:4336505e4b1c | 965 | config->clock_polarity_inverted = false; |
Kojto | 111:4336505e4b1c | 966 | config->use_external_clock = false; |
Kojto | 111:4336505e4b1c | 967 | config->ext_clock_freq = 0; |
Kojto | 111:4336505e4b1c | 968 | config->mux_setting = USART_RX_1_TX_2_XCK_3; |
Kojto | 111:4336505e4b1c | 969 | config->run_in_standby = false; |
Kojto | 111:4336505e4b1c | 970 | config->generator_source = GCLK_GENERATOR_0; |
Kojto | 111:4336505e4b1c | 971 | config->pinmux_pad0 = PINMUX_DEFAULT; |
Kojto | 111:4336505e4b1c | 972 | config->pinmux_pad1 = PINMUX_DEFAULT; |
Kojto | 111:4336505e4b1c | 973 | config->pinmux_pad2 = PINMUX_DEFAULT; |
Kojto | 111:4336505e4b1c | 974 | config->pinmux_pad3 = PINMUX_DEFAULT; |
Kojto | 111:4336505e4b1c | 975 | #ifdef FEATURE_USART_OVER_SAMPLE |
Kojto | 111:4336505e4b1c | 976 | config->sample_adjustment = USART_SAMPLE_ADJUSTMENT_7_8_9; |
Kojto | 111:4336505e4b1c | 977 | config->sample_rate = USART_SAMPLE_RATE_16X_ARITHMETIC; |
Kojto | 111:4336505e4b1c | 978 | #endif |
Kojto | 111:4336505e4b1c | 979 | #ifdef FEATURE_USART_LIN_SLAVE |
Kojto | 111:4336505e4b1c | 980 | config->lin_slave_enable = false; |
Kojto | 111:4336505e4b1c | 981 | #endif |
Kojto | 111:4336505e4b1c | 982 | |
Kojto | 111:4336505e4b1c | 983 | #ifdef FEATURE_USART_LIN_MASTER |
Kojto | 111:4336505e4b1c | 984 | config->lin_node = LIN_INVALID_MODE; |
Kojto | 111:4336505e4b1c | 985 | config->lin_header_delay = LIN_MASTER_HEADER_DELAY_0; |
Kojto | 111:4336505e4b1c | 986 | config->lin_break_length = LIN_MASTER_BREAK_LENGTH_13_BIT; |
Kojto | 111:4336505e4b1c | 987 | #endif |
Kojto | 111:4336505e4b1c | 988 | |
Kojto | 111:4336505e4b1c | 989 | #ifdef FEATURE_USART_IMMEDIATE_BUFFER_OVERFLOW_NOTIFICATION |
Kojto | 111:4336505e4b1c | 990 | config->immediate_buffer_overflow_notification = false; |
Kojto | 111:4336505e4b1c | 991 | #endif |
Kojto | 111:4336505e4b1c | 992 | #ifdef FEATURE_USART_START_FRAME_DECTION |
Kojto | 111:4336505e4b1c | 993 | config->start_frame_detection_enable = false; |
Kojto | 111:4336505e4b1c | 994 | #endif |
Kojto | 111:4336505e4b1c | 995 | #ifdef FEATURE_USART_IRDA |
Kojto | 111:4336505e4b1c | 996 | config->encoding_format_enable = false; |
Kojto | 111:4336505e4b1c | 997 | config->receive_pulse_length = 19; |
Kojto | 111:4336505e4b1c | 998 | #endif |
Kojto | 111:4336505e4b1c | 999 | #ifdef FEATURE_USART_COLLISION_DECTION |
Kojto | 111:4336505e4b1c | 1000 | config->collision_detection_enable = false; |
Kojto | 111:4336505e4b1c | 1001 | #endif |
Kojto | 111:4336505e4b1c | 1002 | #ifdef FEATURE_USART_RS485 |
Kojto | 111:4336505e4b1c | 1003 | config->rs485_guard_time = RS485_GUARD_TIME_0_BIT; |
Kojto | 111:4336505e4b1c | 1004 | #endif |
Kojto | 111:4336505e4b1c | 1005 | } |
Kojto | 111:4336505e4b1c | 1006 | |
Kojto | 111:4336505e4b1c | 1007 | enum status_code usart_init( |
Kojto | 111:4336505e4b1c | 1008 | struct usart_module *const module, |
Kojto | 111:4336505e4b1c | 1009 | Sercom *const hw, |
Kojto | 111:4336505e4b1c | 1010 | const struct usart_config *const config); |
Kojto | 111:4336505e4b1c | 1011 | |
Kojto | 111:4336505e4b1c | 1012 | /** |
Kojto | 111:4336505e4b1c | 1013 | * \brief Enable the module |
Kojto | 111:4336505e4b1c | 1014 | * |
Kojto | 111:4336505e4b1c | 1015 | * Enables the USART module. |
Kojto | 111:4336505e4b1c | 1016 | * |
Kojto | 111:4336505e4b1c | 1017 | * \param[in] module Pointer to USART software instance struct |
Kojto | 111:4336505e4b1c | 1018 | */ |
Kojto | 111:4336505e4b1c | 1019 | static inline void usart_enable( |
Kojto | 111:4336505e4b1c | 1020 | const struct usart_module *const module) |
Kojto | 111:4336505e4b1c | 1021 | { |
Kojto | 111:4336505e4b1c | 1022 | /* Sanity check arguments */ |
Kojto | 111:4336505e4b1c | 1023 | Assert(module); |
Kojto | 111:4336505e4b1c | 1024 | Assert(module->hw); |
Kojto | 111:4336505e4b1c | 1025 | |
Kojto | 111:4336505e4b1c | 1026 | /* Get a pointer to the hardware module instance */ |
Kojto | 111:4336505e4b1c | 1027 | SercomUsart *const usart_hw = &(module->hw->USART); |
Kojto | 111:4336505e4b1c | 1028 | |
Kojto | 111:4336505e4b1c | 1029 | #if USART_CALLBACK_MODE == true |
Kojto | 111:4336505e4b1c | 1030 | /* Enable Global interrupt for module */ |
Kojto | 111:4336505e4b1c | 1031 | system_interrupt_enable(_sercom_get_interrupt_vector(module->hw)); |
Kojto | 111:4336505e4b1c | 1032 | #endif |
Kojto | 111:4336505e4b1c | 1033 | |
Kojto | 111:4336505e4b1c | 1034 | /* Wait until synchronization is complete */ |
Kojto | 111:4336505e4b1c | 1035 | _usart_wait_for_sync(module); |
Kojto | 111:4336505e4b1c | 1036 | |
Kojto | 111:4336505e4b1c | 1037 | /* Enable USART module */ |
Kojto | 111:4336505e4b1c | 1038 | usart_hw->CTRLA.reg |= SERCOM_USART_CTRLA_ENABLE; |
Kojto | 111:4336505e4b1c | 1039 | } |
Kojto | 111:4336505e4b1c | 1040 | |
Kojto | 111:4336505e4b1c | 1041 | /** |
Kojto | 111:4336505e4b1c | 1042 | * \brief Disable module |
Kojto | 111:4336505e4b1c | 1043 | * |
Kojto | 111:4336505e4b1c | 1044 | * Disables the USART module. |
Kojto | 111:4336505e4b1c | 1045 | * |
Kojto | 111:4336505e4b1c | 1046 | * \param[in] module Pointer to USART software instance struct |
Kojto | 111:4336505e4b1c | 1047 | */ |
Kojto | 111:4336505e4b1c | 1048 | static inline void usart_disable( |
Kojto | 111:4336505e4b1c | 1049 | const struct usart_module *const module) |
Kojto | 111:4336505e4b1c | 1050 | { |
Kojto | 111:4336505e4b1c | 1051 | /* Sanity check arguments */ |
Kojto | 111:4336505e4b1c | 1052 | Assert(module); |
Kojto | 111:4336505e4b1c | 1053 | Assert(module->hw); |
Kojto | 111:4336505e4b1c | 1054 | |
Kojto | 111:4336505e4b1c | 1055 | /* Get a pointer to the hardware module instance */ |
Kojto | 111:4336505e4b1c | 1056 | SercomUsart *const usart_hw = &(module->hw->USART); |
Kojto | 111:4336505e4b1c | 1057 | |
Kojto | 111:4336505e4b1c | 1058 | #if USART_CALLBACK_MODE == true |
Kojto | 111:4336505e4b1c | 1059 | /* Disable Global interrupt for module */ |
Kojto | 111:4336505e4b1c | 1060 | system_interrupt_disable(_sercom_get_interrupt_vector(module->hw)); |
Kojto | 111:4336505e4b1c | 1061 | #endif |
Kojto | 111:4336505e4b1c | 1062 | /* Wait until synchronization is complete */ |
Kojto | 111:4336505e4b1c | 1063 | _usart_wait_for_sync(module); |
Kojto | 111:4336505e4b1c | 1064 | |
Kojto | 111:4336505e4b1c | 1065 | /* Disable USART module */ |
Kojto | 111:4336505e4b1c | 1066 | usart_hw->CTRLA.reg &= ~SERCOM_USART_CTRLA_ENABLE; |
Kojto | 111:4336505e4b1c | 1067 | } |
Kojto | 111:4336505e4b1c | 1068 | |
Kojto | 111:4336505e4b1c | 1069 | /** |
Kojto | 111:4336505e4b1c | 1070 | * \brief Resets the USART module |
Kojto | 111:4336505e4b1c | 1071 | * |
Kojto | 111:4336505e4b1c | 1072 | * Disables and resets the USART module. |
Kojto | 111:4336505e4b1c | 1073 | * |
Kojto | 111:4336505e4b1c | 1074 | * \param[in] module Pointer to the USART software instance struct |
Kojto | 111:4336505e4b1c | 1075 | */ |
Kojto | 111:4336505e4b1c | 1076 | static inline void usart_reset( |
Kojto | 111:4336505e4b1c | 1077 | const struct usart_module *const module) |
Kojto | 111:4336505e4b1c | 1078 | { |
Kojto | 111:4336505e4b1c | 1079 | /* Sanity check arguments */ |
Kojto | 111:4336505e4b1c | 1080 | Assert(module); |
Kojto | 111:4336505e4b1c | 1081 | Assert(module->hw); |
Kojto | 111:4336505e4b1c | 1082 | |
Kojto | 111:4336505e4b1c | 1083 | /* Get a pointer to the hardware module instance */ |
Kojto | 111:4336505e4b1c | 1084 | SercomUsart *const usart_hw = &(module->hw->USART); |
Kojto | 111:4336505e4b1c | 1085 | |
Kojto | 111:4336505e4b1c | 1086 | usart_disable(module); |
Kojto | 111:4336505e4b1c | 1087 | |
Kojto | 111:4336505e4b1c | 1088 | /* Wait until synchronization is complete */ |
Kojto | 111:4336505e4b1c | 1089 | _usart_wait_for_sync(module); |
Kojto | 111:4336505e4b1c | 1090 | |
Kojto | 111:4336505e4b1c | 1091 | /* Reset module */ |
Kojto | 111:4336505e4b1c | 1092 | usart_hw->CTRLA.reg = SERCOM_USART_CTRLA_SWRST; |
Kojto | 111:4336505e4b1c | 1093 | } |
Kojto | 111:4336505e4b1c | 1094 | |
Kojto | 111:4336505e4b1c | 1095 | /** |
Kojto | 111:4336505e4b1c | 1096 | * \name Writing and Reading |
Kojto | 111:4336505e4b1c | 1097 | * @{ |
Kojto | 111:4336505e4b1c | 1098 | */ |
Kojto | 111:4336505e4b1c | 1099 | enum status_code usart_write_wait( |
Kojto | 111:4336505e4b1c | 1100 | struct usart_module *const module, |
Kojto | 111:4336505e4b1c | 1101 | const uint16_t tx_data); |
Kojto | 111:4336505e4b1c | 1102 | |
Kojto | 111:4336505e4b1c | 1103 | enum status_code usart_read_wait( |
Kojto | 111:4336505e4b1c | 1104 | struct usart_module *const module, |
Kojto | 111:4336505e4b1c | 1105 | uint16_t *const rx_data); |
Kojto | 111:4336505e4b1c | 1106 | |
Kojto | 111:4336505e4b1c | 1107 | enum status_code usart_write_buffer_wait( |
Kojto | 111:4336505e4b1c | 1108 | struct usart_module *const module, |
Kojto | 111:4336505e4b1c | 1109 | const uint8_t *tx_data, |
Kojto | 111:4336505e4b1c | 1110 | uint16_t length); |
Kojto | 111:4336505e4b1c | 1111 | |
Kojto | 111:4336505e4b1c | 1112 | enum status_code usart_read_buffer_wait( |
Kojto | 111:4336505e4b1c | 1113 | struct usart_module *const module, |
Kojto | 111:4336505e4b1c | 1114 | uint8_t *rx_data, |
Kojto | 111:4336505e4b1c | 1115 | uint16_t length); |
Kojto | 111:4336505e4b1c | 1116 | /** @} */ |
Kojto | 111:4336505e4b1c | 1117 | |
Kojto | 111:4336505e4b1c | 1118 | /** |
Kojto | 111:4336505e4b1c | 1119 | * \name Enabling/Disabling Receiver and Transmitter |
Kojto | 111:4336505e4b1c | 1120 | * @{ |
Kojto | 111:4336505e4b1c | 1121 | */ |
Kojto | 111:4336505e4b1c | 1122 | |
Kojto | 111:4336505e4b1c | 1123 | /** |
Kojto | 111:4336505e4b1c | 1124 | * \brief Enable Transceiver |
Kojto | 111:4336505e4b1c | 1125 | * |
Kojto | 111:4336505e4b1c | 1126 | * Enable the given transceiver. Either RX or TX. |
Kojto | 111:4336505e4b1c | 1127 | * |
Kojto | 111:4336505e4b1c | 1128 | * \param[in] module Pointer to USART software instance struct |
Kojto | 111:4336505e4b1c | 1129 | * \param[in] transceiver_type Transceiver type |
Kojto | 111:4336505e4b1c | 1130 | */ |
Kojto | 111:4336505e4b1c | 1131 | static inline void usart_enable_transceiver( |
Kojto | 111:4336505e4b1c | 1132 | struct usart_module *const module, |
Kojto | 111:4336505e4b1c | 1133 | enum usart_transceiver_type transceiver_type) |
Kojto | 111:4336505e4b1c | 1134 | { |
Kojto | 111:4336505e4b1c | 1135 | /* Sanity check arguments */ |
Kojto | 111:4336505e4b1c | 1136 | Assert(module); |
Kojto | 111:4336505e4b1c | 1137 | Assert(module->hw); |
Kojto | 111:4336505e4b1c | 1138 | |
Kojto | 111:4336505e4b1c | 1139 | /* Get a pointer to the hardware module instance */ |
Kojto | 111:4336505e4b1c | 1140 | SercomUsart *const usart_hw = &(module->hw->USART); |
Kojto | 111:4336505e4b1c | 1141 | |
Kojto | 111:4336505e4b1c | 1142 | /* Wait until synchronization is complete */ |
Kojto | 111:4336505e4b1c | 1143 | _usart_wait_for_sync(module); |
Kojto | 111:4336505e4b1c | 1144 | |
Kojto | 111:4336505e4b1c | 1145 | switch (transceiver_type) { |
Kojto | 111:4336505e4b1c | 1146 | case USART_TRANSCEIVER_RX: |
Kojto | 111:4336505e4b1c | 1147 | /* Enable RX */ |
Kojto | 111:4336505e4b1c | 1148 | usart_hw->CTRLB.reg |= SERCOM_USART_CTRLB_RXEN; |
Kojto | 111:4336505e4b1c | 1149 | module->receiver_enabled = true; |
Kojto | 111:4336505e4b1c | 1150 | break; |
Kojto | 111:4336505e4b1c | 1151 | |
Kojto | 111:4336505e4b1c | 1152 | case USART_TRANSCEIVER_TX: |
Kojto | 111:4336505e4b1c | 1153 | /* Enable TX */ |
Kojto | 111:4336505e4b1c | 1154 | usart_hw->CTRLB.reg |= SERCOM_USART_CTRLB_TXEN; |
Kojto | 111:4336505e4b1c | 1155 | module->transmitter_enabled = true; |
Kojto | 111:4336505e4b1c | 1156 | break; |
Kojto | 111:4336505e4b1c | 1157 | } |
Kojto | 111:4336505e4b1c | 1158 | _usart_wait_for_sync(module); |
Kojto | 111:4336505e4b1c | 1159 | } |
Kojto | 111:4336505e4b1c | 1160 | |
Kojto | 111:4336505e4b1c | 1161 | /** |
Kojto | 111:4336505e4b1c | 1162 | * \brief Disable Transceiver |
Kojto | 111:4336505e4b1c | 1163 | * |
Kojto | 111:4336505e4b1c | 1164 | * Disable the given transceiver (RX or TX). |
Kojto | 111:4336505e4b1c | 1165 | * |
Kojto | 111:4336505e4b1c | 1166 | * \param[in] module Pointer to USART software instance struct |
Kojto | 111:4336505e4b1c | 1167 | * \param[in] transceiver_type Transceiver type |
Kojto | 111:4336505e4b1c | 1168 | */ |
Kojto | 111:4336505e4b1c | 1169 | static inline void usart_disable_transceiver( |
Kojto | 111:4336505e4b1c | 1170 | struct usart_module *const module, |
Kojto | 111:4336505e4b1c | 1171 | enum usart_transceiver_type transceiver_type) |
Kojto | 111:4336505e4b1c | 1172 | { |
Kojto | 111:4336505e4b1c | 1173 | /* Sanity check arguments */ |
Kojto | 111:4336505e4b1c | 1174 | Assert(module); |
Kojto | 111:4336505e4b1c | 1175 | Assert(module->hw); |
Kojto | 111:4336505e4b1c | 1176 | |
Kojto | 111:4336505e4b1c | 1177 | /* Get a pointer to the hardware module instance */ |
Kojto | 111:4336505e4b1c | 1178 | SercomUsart *const usart_hw = &(module->hw->USART); |
Kojto | 111:4336505e4b1c | 1179 | |
Kojto | 111:4336505e4b1c | 1180 | /* Wait until synchronization is complete */ |
Kojto | 111:4336505e4b1c | 1181 | _usart_wait_for_sync(module); |
Kojto | 111:4336505e4b1c | 1182 | |
Kojto | 111:4336505e4b1c | 1183 | switch (transceiver_type) { |
Kojto | 111:4336505e4b1c | 1184 | case USART_TRANSCEIVER_RX: |
Kojto | 111:4336505e4b1c | 1185 | /* Disable RX */ |
Kojto | 111:4336505e4b1c | 1186 | usart_hw->CTRLB.reg &= ~SERCOM_USART_CTRLB_RXEN; |
Kojto | 111:4336505e4b1c | 1187 | module->receiver_enabled = false; |
Kojto | 111:4336505e4b1c | 1188 | break; |
Kojto | 111:4336505e4b1c | 1189 | |
Kojto | 111:4336505e4b1c | 1190 | case USART_TRANSCEIVER_TX: |
Kojto | 111:4336505e4b1c | 1191 | /* Disable TX */ |
Kojto | 111:4336505e4b1c | 1192 | usart_hw->CTRLB.reg &= ~SERCOM_USART_CTRLB_TXEN; |
Kojto | 111:4336505e4b1c | 1193 | module->transmitter_enabled = false; |
Kojto | 111:4336505e4b1c | 1194 | break; |
Kojto | 111:4336505e4b1c | 1195 | } |
Kojto | 111:4336505e4b1c | 1196 | } |
Kojto | 111:4336505e4b1c | 1197 | |
Kojto | 111:4336505e4b1c | 1198 | /** @} */ |
Kojto | 111:4336505e4b1c | 1199 | |
Kojto | 111:4336505e4b1c | 1200 | #ifdef FEATURE_USART_LIN_MASTER |
Kojto | 111:4336505e4b1c | 1201 | /** |
Kojto | 111:4336505e4b1c | 1202 | * \name LIN Master Command and Status |
Kojto | 111:4336505e4b1c | 1203 | * @{ |
Kojto | 111:4336505e4b1c | 1204 | */ |
Kojto | 111:4336505e4b1c | 1205 | |
Kojto | 111:4336505e4b1c | 1206 | /** |
Kojto | 111:4336505e4b1c | 1207 | * \brief Sending LIN command. |
Kojto | 111:4336505e4b1c | 1208 | * |
Kojto | 111:4336505e4b1c | 1209 | * Sending LIN command. |
Kojto | 111:4336505e4b1c | 1210 | * |
Kojto | 111:4336505e4b1c | 1211 | * \param[in] module Pointer to USART software instance struct. |
Kojto | 111:4336505e4b1c | 1212 | * \param[in] cmd Cammand type. |
Kojto | 111:4336505e4b1c | 1213 | */ |
Kojto | 111:4336505e4b1c | 1214 | static inline void lin_master_send_cmd( |
Kojto | 111:4336505e4b1c | 1215 | struct usart_module *const module, |
Kojto | 111:4336505e4b1c | 1216 | enum lin_master_cmd cmd) |
Kojto | 111:4336505e4b1c | 1217 | { |
Kojto | 111:4336505e4b1c | 1218 | SercomUsart *const usart_hw = &(module->hw->USART); |
Kojto | 111:4336505e4b1c | 1219 | _usart_wait_for_sync(module); |
Kojto | 111:4336505e4b1c | 1220 | usart_hw->CTRLB.reg |= cmd; |
Kojto | 111:4336505e4b1c | 1221 | } |
Kojto | 111:4336505e4b1c | 1222 | |
Kojto | 111:4336505e4b1c | 1223 | /** |
Kojto | 111:4336505e4b1c | 1224 | * \brief Get LIN transmission status. |
Kojto | 111:4336505e4b1c | 1225 | * |
Kojto | 111:4336505e4b1c | 1226 | * Get LIN transmission status. |
Kojto | 111:4336505e4b1c | 1227 | * |
Kojto | 111:4336505e4b1c | 1228 | * \param[in] module Pointer to USART software instance struct. |
Kojto | 111:4336505e4b1c | 1229 | * |
Kojto | 111:4336505e4b1c | 1230 | * \return Status of LIN master transmission. |
Kojto | 111:4336505e4b1c | 1231 | * \retval true Data transmission completed |
Kojto | 111:4336505e4b1c | 1232 | * \retval false Transmission is ongoing |
Kojto | 111:4336505e4b1c | 1233 | */ |
Kojto | 111:4336505e4b1c | 1234 | static inline bool lin_master_transmission_status(struct usart_module *const module) |
Kojto | 111:4336505e4b1c | 1235 | { |
Kojto | 111:4336505e4b1c | 1236 | SercomUsart *const usart_hw = &(module->hw->USART); |
Kojto | 111:4336505e4b1c | 1237 | return ((usart_hw->STATUS.reg & SERCOM_USART_STATUS_TXE)? true:false); |
Kojto | 111:4336505e4b1c | 1238 | } |
Kojto | 111:4336505e4b1c | 1239 | |
Kojto | 111:4336505e4b1c | 1240 | /** @} */ |
Kojto | 111:4336505e4b1c | 1241 | #endif |
Kojto | 111:4336505e4b1c | 1242 | |
Kojto | 111:4336505e4b1c | 1243 | #ifdef __cplusplus |
Kojto | 111:4336505e4b1c | 1244 | } |
Kojto | 111:4336505e4b1c | 1245 | #endif |
Kojto | 111:4336505e4b1c | 1246 | |
Kojto | 111:4336505e4b1c | 1247 | /** @} */ |
Kojto | 111:4336505e4b1c | 1248 | |
Kojto | 111:4336505e4b1c | 1249 | /** |
Kojto | 111:4336505e4b1c | 1250 | * \page asfdoc_sam0_sercom_usart_extra Extra Information for SERCOM USART Driver |
Kojto | 111:4336505e4b1c | 1251 | * |
Kojto | 111:4336505e4b1c | 1252 | * \section asfdoc_sam0_sercom_usart_extra_acronyms Acronyms |
Kojto | 111:4336505e4b1c | 1253 | * |
Kojto | 111:4336505e4b1c | 1254 | * Below is a table listing the acronyms used in this module, along with their |
Kojto | 111:4336505e4b1c | 1255 | * intended meanings. |
Kojto | 111:4336505e4b1c | 1256 | * |
Kojto | 111:4336505e4b1c | 1257 | * <table> |
Kojto | 111:4336505e4b1c | 1258 | * <tr> |
Kojto | 111:4336505e4b1c | 1259 | * <th>Acronym</th> |
Kojto | 111:4336505e4b1c | 1260 | * <th>Description</th> |
Kojto | 111:4336505e4b1c | 1261 | * </tr> |
Kojto | 111:4336505e4b1c | 1262 | * <tr> |
Kojto | 111:4336505e4b1c | 1263 | * <td>SERCOM</td> |
Kojto | 111:4336505e4b1c | 1264 | * <td>Serial Communication Interface</td> |
Kojto | 111:4336505e4b1c | 1265 | * </tr> |
Kojto | 111:4336505e4b1c | 1266 | * <tr> |
Kojto | 111:4336505e4b1c | 1267 | * <td>USART</td> |
Kojto | 111:4336505e4b1c | 1268 | * <td>Universal Synchronous and Asynchronous Serial Receiver and Transmitter</td> |
Kojto | 111:4336505e4b1c | 1269 | * </tr> |
Kojto | 111:4336505e4b1c | 1270 | * <tr> |
Kojto | 111:4336505e4b1c | 1271 | * <td>LSB</td> |
Kojto | 111:4336505e4b1c | 1272 | * <td>Least Significant Bit</td> |
Kojto | 111:4336505e4b1c | 1273 | * </tr> |
Kojto | 111:4336505e4b1c | 1274 | * <tr> |
Kojto | 111:4336505e4b1c | 1275 | * <td>MSB</td> |
Kojto | 111:4336505e4b1c | 1276 | * <td>Most Significant Bit</td> |
Kojto | 111:4336505e4b1c | 1277 | * </tr> |
Kojto | 111:4336505e4b1c | 1278 | * <tr> |
Kojto | 111:4336505e4b1c | 1279 | * <td>DMA</td> |
Kojto | 111:4336505e4b1c | 1280 | * <td>Direct Memory Access</td> |
Kojto | 111:4336505e4b1c | 1281 | * </tr> |
Kojto | 111:4336505e4b1c | 1282 | * </table> |
Kojto | 111:4336505e4b1c | 1283 | * |
Kojto | 111:4336505e4b1c | 1284 | * |
Kojto | 111:4336505e4b1c | 1285 | * \section asfdoc_sam0_sercom_usart_extra_dependencies Dependencies |
Kojto | 111:4336505e4b1c | 1286 | * This driver has the following dependencies: |
Kojto | 111:4336505e4b1c | 1287 | * |
Kojto | 111:4336505e4b1c | 1288 | * - \ref asfdoc_sam0_system_pinmux_group "System Pin Multiplexer Driver" |
Kojto | 111:4336505e4b1c | 1289 | * - \ref asfdoc_sam0_system_clock_group "System clock configuration" |
Kojto | 111:4336505e4b1c | 1290 | * |
Kojto | 111:4336505e4b1c | 1291 | * |
Kojto | 111:4336505e4b1c | 1292 | * \section asfdoc_sam0_sercom_usart_extra_errata Errata |
Kojto | 111:4336505e4b1c | 1293 | * There are no errata related to this driver. |
Kojto | 111:4336505e4b1c | 1294 | * |
Kojto | 111:4336505e4b1c | 1295 | * |
Kojto | 111:4336505e4b1c | 1296 | * \section asfdoc_sam0_sercom_usart_extra_history Module History |
Kojto | 111:4336505e4b1c | 1297 | * An overview of the module history is presented in the table below, with |
Kojto | 111:4336505e4b1c | 1298 | * details on the enhancements and fixes made to the module since its first |
Kojto | 111:4336505e4b1c | 1299 | * release. The current version of this corresponds to the newest version in |
Kojto | 111:4336505e4b1c | 1300 | * the table. |
Kojto | 111:4336505e4b1c | 1301 | * |
Kojto | 111:4336505e4b1c | 1302 | * <table> |
Kojto | 111:4336505e4b1c | 1303 | * <tr> |
Kojto | 111:4336505e4b1c | 1304 | * <th>Changelog</th> |
Kojto | 111:4336505e4b1c | 1305 | * </tr> |
Kojto | 111:4336505e4b1c | 1306 | * <tr> |
Kojto | 111:4336505e4b1c | 1307 | * <td>Added new feature as below: |
Kojto | 111:4336505e4b1c | 1308 | * \li LIN master |
Kojto | 111:4336505e4b1c | 1309 | * \li RS485 |
Kojto | 111:4336505e4b1c | 1310 | * </tr> |
Kojto | 111:4336505e4b1c | 1311 | * <tr> |
Kojto | 111:4336505e4b1c | 1312 | * <td>Added new feature as below: |
Kojto | 111:4336505e4b1c | 1313 | * \li Oversample |
Kojto | 111:4336505e4b1c | 1314 | * \li Buffer overflow notification |
Kojto | 111:4336505e4b1c | 1315 | * \li Irda |
Kojto | 111:4336505e4b1c | 1316 | * \li Lin slave |
Kojto | 111:4336505e4b1c | 1317 | * \li Start frame detection |
Kojto | 111:4336505e4b1c | 1318 | * \li Hardware flow control |
Kojto | 111:4336505e4b1c | 1319 | * \li Collision detection |
Kojto | 111:4336505e4b1c | 1320 | * \li DMA support </td> |
Kojto | 111:4336505e4b1c | 1321 | * </tr> |
Kojto | 111:4336505e4b1c | 1322 | * <tr> |
Kojto | 111:4336505e4b1c | 1323 | * <td>\li Added new \c transmitter_enable and \c receiver_enable Boolean |
Kojto | 111:4336505e4b1c | 1324 | * values to \c struct usart_config |
Kojto | 111:4336505e4b1c | 1325 | * \li Altered \c usart_write_* and usart_read_* functions to abort with |
Kojto | 111:4336505e4b1c | 1326 | * an error code if the relevant transceiver is not enabled |
Kojto | 111:4336505e4b1c | 1327 | * \li Fixed \c usart_write_buffer_wait() and \c usart_read_buffer_wait() |
Kojto | 111:4336505e4b1c | 1328 | * not aborting correctly when a timeout condition occurs</td> |
Kojto | 111:4336505e4b1c | 1329 | * </tr> |
Kojto | 111:4336505e4b1c | 1330 | * <tr> |
Kojto | 111:4336505e4b1c | 1331 | * <td>Initial Release</td> |
Kojto | 111:4336505e4b1c | 1332 | * </tr> |
Kojto | 111:4336505e4b1c | 1333 | * </table> |
Kojto | 111:4336505e4b1c | 1334 | */ |
Kojto | 111:4336505e4b1c | 1335 | |
Kojto | 111:4336505e4b1c | 1336 | /** |
Kojto | 111:4336505e4b1c | 1337 | * \page asfdoc_sam0_sercom_usart_exqsg Examples for SERCOM USART Driver |
Kojto | 111:4336505e4b1c | 1338 | * |
Kojto | 111:4336505e4b1c | 1339 | * This is a list of the available Quick Start guides (QSGs) and example |
Kojto | 111:4336505e4b1c | 1340 | * applications for \ref asfdoc_sam0_sercom_usart_group. QSGs are simple examples with |
Kojto | 111:4336505e4b1c | 1341 | * step-by-step instructions to configure and use this driver in a selection of |
Kojto | 111:4336505e4b1c | 1342 | * use cases. Note that QSGs can be compiled as a standalone application or be |
Kojto | 111:4336505e4b1c | 1343 | * added to the user application. |
Kojto | 111:4336505e4b1c | 1344 | * |
Kojto | 111:4336505e4b1c | 1345 | * - \subpage asfdoc_sam0_sercom_usart_basic_use_case |
Kojto | 111:4336505e4b1c | 1346 | * \if USART_CALLBACK_MODE |
Kojto | 111:4336505e4b1c | 1347 | * - \subpage asfdoc_sam0_sercom_usart_callback_use_case |
Kojto | 111:4336505e4b1c | 1348 | * \endif |
Kojto | 111:4336505e4b1c | 1349 | * - \subpage asfdoc_sam0_sercom_usart_dma_use_case |
Kojto | 111:4336505e4b1c | 1350 | * - \subpage asfdoc_sam0_sercom_usart_lin_use_case |
Kojto | 111:4336505e4b1c | 1351 | */ |
Kojto | 111:4336505e4b1c | 1352 | |
Kojto | 111:4336505e4b1c | 1353 | /** |
Kojto | 111:4336505e4b1c | 1354 | * \page asfdoc_sam0_sercom_usart_mux_settings SERCOM USART MUX Settings |
Kojto | 111:4336505e4b1c | 1355 | * |
Kojto | 111:4336505e4b1c | 1356 | * The following lists the possible internal SERCOM module pad function |
Kojto | 111:4336505e4b1c | 1357 | * assignments, for the four SERCOM pads when in USART mode. Note that this is |
Kojto | 111:4336505e4b1c | 1358 | * in addition to the physical GPIO pin MUX of the device, and can be used in |
Kojto | 111:4336505e4b1c | 1359 | * conjunction to optimize the serial data pin-out. |
Kojto | 111:4336505e4b1c | 1360 | * |
Kojto | 111:4336505e4b1c | 1361 | * When TX and RX are connected to the same pin, the USART will operate in |
Kojto | 111:4336505e4b1c | 1362 | * half-duplex mode if both the transmitter and receivers are enabled. |
Kojto | 111:4336505e4b1c | 1363 | * |
Kojto | 111:4336505e4b1c | 1364 | * \note When RX and XCK are connected to the same pin, the receiver must not |
Kojto | 111:4336505e4b1c | 1365 | * be enabled if the USART is configured to use an external clock. |
Kojto | 111:4336505e4b1c | 1366 | * |
Kojto | 111:4336505e4b1c | 1367 | * |
Kojto | 111:4336505e4b1c | 1368 | * <table> |
Kojto | 111:4336505e4b1c | 1369 | * <tr> |
Kojto | 111:4336505e4b1c | 1370 | * <th>MUX/Pad</th> |
Kojto | 111:4336505e4b1c | 1371 | * <th>PAD 0</th> |
Kojto | 111:4336505e4b1c | 1372 | * <th>PAD 1</th> |
Kojto | 111:4336505e4b1c | 1373 | * <th>PAD 2</th> |
Kojto | 111:4336505e4b1c | 1374 | * <th>PAD 3</th> |
Kojto | 111:4336505e4b1c | 1375 | * </tr> |
Kojto | 111:4336505e4b1c | 1376 | * <tr> |
Kojto | 111:4336505e4b1c | 1377 | * <td>RX_0_TX_0_XCK_1</td> |
Kojto | 111:4336505e4b1c | 1378 | * <td>TX / RX</td> |
Kojto | 111:4336505e4b1c | 1379 | * <td>XCK</td> |
Kojto | 111:4336505e4b1c | 1380 | * <td>-</td> |
Kojto | 111:4336505e4b1c | 1381 | * <td>-</td> |
Kojto | 111:4336505e4b1c | 1382 | * </tr> |
Kojto | 111:4336505e4b1c | 1383 | * <tr> |
Kojto | 111:4336505e4b1c | 1384 | * <td>RX_0_TX_2_XCK_3</td> |
Kojto | 111:4336505e4b1c | 1385 | * <td>RX</td> |
Kojto | 111:4336505e4b1c | 1386 | * <td>-</td> |
Kojto | 111:4336505e4b1c | 1387 | * <td>TX</td> |
Kojto | 111:4336505e4b1c | 1388 | * <td>XCK</td> |
Kojto | 111:4336505e4b1c | 1389 | * </tr> |
Kojto | 111:4336505e4b1c | 1390 | * <tr> |
Kojto | 111:4336505e4b1c | 1391 | * <td>RX_1_TX_0_XCK_1</td> |
Kojto | 111:4336505e4b1c | 1392 | * <td>TX</td> |
Kojto | 111:4336505e4b1c | 1393 | * <td>RX / XCK</td> |
Kojto | 111:4336505e4b1c | 1394 | * <td>-</td> |
Kojto | 111:4336505e4b1c | 1395 | * <td>-</td> |
Kojto | 111:4336505e4b1c | 1396 | * </tr> |
Kojto | 111:4336505e4b1c | 1397 | * <tr> |
Kojto | 111:4336505e4b1c | 1398 | * <td>RX_1_TX_2_XCK_3</td> |
Kojto | 111:4336505e4b1c | 1399 | * <td>-</td> |
Kojto | 111:4336505e4b1c | 1400 | * <td>RX</td> |
Kojto | 111:4336505e4b1c | 1401 | * <td>TX</td> |
Kojto | 111:4336505e4b1c | 1402 | * <td>XCK</td> |
Kojto | 111:4336505e4b1c | 1403 | * </tr> |
Kojto | 111:4336505e4b1c | 1404 | * <tr> |
Kojto | 111:4336505e4b1c | 1405 | * <td>RX_2_TX_0_XCK_1</td> |
Kojto | 111:4336505e4b1c | 1406 | * <td>TX</td> |
Kojto | 111:4336505e4b1c | 1407 | * <td>XCK</td> |
Kojto | 111:4336505e4b1c | 1408 | * <td>RX</td> |
Kojto | 111:4336505e4b1c | 1409 | * <td>-</td> |
Kojto | 111:4336505e4b1c | 1410 | * </tr> |
Kojto | 111:4336505e4b1c | 1411 | * <tr> |
Kojto | 111:4336505e4b1c | 1412 | * <td>RX_2_TX_2_XCK_3</td> |
Kojto | 111:4336505e4b1c | 1413 | * <td>-</td> |
Kojto | 111:4336505e4b1c | 1414 | * <td>-</td> |
Kojto | 111:4336505e4b1c | 1415 | * <td>TX / RX</td> |
Kojto | 111:4336505e4b1c | 1416 | * <td>XCK</td> |
Kojto | 111:4336505e4b1c | 1417 | * </tr> |
Kojto | 111:4336505e4b1c | 1418 | * <tr> |
Kojto | 111:4336505e4b1c | 1419 | * <td>RX_3_TX_0_XCK_1</td> |
Kojto | 111:4336505e4b1c | 1420 | * <td>TX</td> |
Kojto | 111:4336505e4b1c | 1421 | * <td>XCK</td> |
Kojto | 111:4336505e4b1c | 1422 | * <td>-</td> |
Kojto | 111:4336505e4b1c | 1423 | * <td>RX</td> |
Kojto | 111:4336505e4b1c | 1424 | * </tr> |
Kojto | 111:4336505e4b1c | 1425 | * <tr> |
Kojto | 111:4336505e4b1c | 1426 | * <td>RX_3_TX_2_XCK_3</td> |
Kojto | 111:4336505e4b1c | 1427 | * <td>-</td> |
Kojto | 111:4336505e4b1c | 1428 | * <td>-</td> |
Kojto | 111:4336505e4b1c | 1429 | * <td>TX</td> |
Kojto | 111:4336505e4b1c | 1430 | * <td>RX / XCK</td> |
Kojto | 111:4336505e4b1c | 1431 | * </tr> |
Kojto | 111:4336505e4b1c | 1432 | * </table> |
Kojto | 111:4336505e4b1c | 1433 | * |
Kojto | 111:4336505e4b1c | 1434 | * \page asfdoc_sam0_sercom_usart_document_revision_history Document Revision History |
Kojto | 111:4336505e4b1c | 1435 | * |
Kojto | 111:4336505e4b1c | 1436 | * <table> |
Kojto | 111:4336505e4b1c | 1437 | * <tr> |
Kojto | 111:4336505e4b1c | 1438 | * <th>Doc. Rev.</td> |
Kojto | 111:4336505e4b1c | 1439 | * <th>Date</td> |
Kojto | 111:4336505e4b1c | 1440 | * <th>Comments</td> |
Kojto | 111:4336505e4b1c | 1441 | * </tr> |
Kojto | 111:4336505e4b1c | 1442 | * <tr> |
Kojto | 111:4336505e4b1c | 1443 | * <td>42118F</td> |
Kojto | 111:4336505e4b1c | 1444 | * <td>06/2015</td> |
Kojto | 111:4336505e4b1c | 1445 | * <td>Add support for SAML21, SAMDAx, and SAMC20/C21.</td> |
Kojto | 111:4336505e4b1c | 1446 | * </tr> |
Kojto | 111:4336505e4b1c | 1447 | * <tr> |
Kojto | 111:4336505e4b1c | 1448 | * <td>42118E</td> |
Kojto | 111:4336505e4b1c | 1449 | * <td>12/2014</td> |
Kojto | 111:4336505e4b1c | 1450 | * <td>Add support for SAMR21 and SAMD10/D11.</td> |
Kojto | 111:4336505e4b1c | 1451 | * </tr> |
Kojto | 111:4336505e4b1c | 1452 | * <tr> |
Kojto | 111:4336505e4b1c | 1453 | * <td>42118D</td> |
Kojto | 111:4336505e4b1c | 1454 | * <td>01/2014</td> |
Kojto | 111:4336505e4b1c | 1455 | * <td>Add support for SAMD21.</td> |
Kojto | 111:4336505e4b1c | 1456 | * </tr> |
Kojto | 111:4336505e4b1c | 1457 | * <tr> |
Kojto | 111:4336505e4b1c | 1458 | * <td>42118C</td> |
Kojto | 111:4336505e4b1c | 1459 | * <td>10/2013</td> |
Kojto | 111:4336505e4b1c | 1460 | * <td>Replaced the pad multiplexing documentation with a condensed table.</td> |
Kojto | 111:4336505e4b1c | 1461 | * </tr> |
Kojto | 111:4336505e4b1c | 1462 | * <tr> |
Kojto | 111:4336505e4b1c | 1463 | * <td>42118B</td> |
Kojto | 111:4336505e4b1c | 1464 | * <td>06/2013</td> |
Kojto | 111:4336505e4b1c | 1465 | * <td>Corrected documentation typos.</td> |
Kojto | 111:4336505e4b1c | 1466 | * </tr> |
Kojto | 111:4336505e4b1c | 1467 | * <tr> |
Kojto | 111:4336505e4b1c | 1468 | * <td>42118A</td> |
Kojto | 111:4336505e4b1c | 1469 | * <td>06/2013</td> |
Kojto | 111:4336505e4b1c | 1470 | * <td>Initial release</td> |
Kojto | 111:4336505e4b1c | 1471 | * </tr> |
Kojto | 111:4336505e4b1c | 1472 | * </table> |
Kojto | 111:4336505e4b1c | 1473 | */ |
Kojto | 111:4336505e4b1c | 1474 | #endif /* USART_H_INCLUDED */ |