mbed library sources. Supersedes mbed-src.
Fork of mbed-dev by
targets/hal/TARGET_Atmel/TARGET_SAM_CortexM0P/drivers/sercom/i2c/i2c_master.h@144:423e1876dc07, 2016-08-02 (annotated)
- Committer:
- screamer
- Date:
- Tue Aug 02 14:07:36 2016 +0000
- Revision:
- 144:423e1876dc07
- Parent:
- 15:a81a8d6c1dfe
Added targets.json file for the supported targets in the release
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbed_official | 15:a81a8d6c1dfe | 1 | /** |
mbed_official | 15:a81a8d6c1dfe | 2 | * \file |
mbed_official | 15:a81a8d6c1dfe | 3 | * |
mbed_official | 15:a81a8d6c1dfe | 4 | * \brief SAM SERCOM I2C Master Driver |
mbed_official | 15:a81a8d6c1dfe | 5 | * |
mbed_official | 15:a81a8d6c1dfe | 6 | * Copyright (C) 2012-2015 Atmel Corporation. All rights reserved. |
mbed_official | 15:a81a8d6c1dfe | 7 | * |
mbed_official | 15:a81a8d6c1dfe | 8 | * \asf_license_start |
mbed_official | 15:a81a8d6c1dfe | 9 | * |
mbed_official | 15:a81a8d6c1dfe | 10 | * \page License |
mbed_official | 15:a81a8d6c1dfe | 11 | * |
mbed_official | 15:a81a8d6c1dfe | 12 | * Redistribution and use in source and binary forms, with or without |
mbed_official | 15:a81a8d6c1dfe | 13 | * modification, are permitted provided that the following conditions are met: |
mbed_official | 15:a81a8d6c1dfe | 14 | * |
mbed_official | 15:a81a8d6c1dfe | 15 | * 1. Redistributions of source code must retain the above copyright notice, |
mbed_official | 15:a81a8d6c1dfe | 16 | * this list of conditions and the following disclaimer. |
mbed_official | 15:a81a8d6c1dfe | 17 | * |
mbed_official | 15:a81a8d6c1dfe | 18 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
mbed_official | 15:a81a8d6c1dfe | 19 | * this list of conditions and the following disclaimer in the documentation |
mbed_official | 15:a81a8d6c1dfe | 20 | * and/or other materials provided with the distribution. |
mbed_official | 15:a81a8d6c1dfe | 21 | * |
mbed_official | 15:a81a8d6c1dfe | 22 | * 3. The name of Atmel may not be used to endorse or promote products derived |
mbed_official | 15:a81a8d6c1dfe | 23 | * from this software without specific prior written permission. |
mbed_official | 15:a81a8d6c1dfe | 24 | * |
mbed_official | 15:a81a8d6c1dfe | 25 | * 4. This software may only be redistributed and used in connection with an |
mbed_official | 15:a81a8d6c1dfe | 26 | * Atmel microcontroller product. |
mbed_official | 15:a81a8d6c1dfe | 27 | * |
mbed_official | 15:a81a8d6c1dfe | 28 | * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED |
mbed_official | 15:a81a8d6c1dfe | 29 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
mbed_official | 15:a81a8d6c1dfe | 30 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE |
mbed_official | 15:a81a8d6c1dfe | 31 | * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR |
mbed_official | 15:a81a8d6c1dfe | 32 | * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
mbed_official | 15:a81a8d6c1dfe | 33 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
mbed_official | 15:a81a8d6c1dfe | 34 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
mbed_official | 15:a81a8d6c1dfe | 35 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
mbed_official | 15:a81a8d6c1dfe | 36 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
mbed_official | 15:a81a8d6c1dfe | 37 | * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
mbed_official | 15:a81a8d6c1dfe | 38 | * POSSIBILITY OF SUCH DAMAGE. |
mbed_official | 15:a81a8d6c1dfe | 39 | * |
mbed_official | 15:a81a8d6c1dfe | 40 | * \asf_license_stop |
mbed_official | 15:a81a8d6c1dfe | 41 | * |
mbed_official | 15:a81a8d6c1dfe | 42 | */ |
mbed_official | 15:a81a8d6c1dfe | 43 | /* |
mbed_official | 15:a81a8d6c1dfe | 44 | * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a> |
mbed_official | 15:a81a8d6c1dfe | 45 | */ |
mbed_official | 15:a81a8d6c1dfe | 46 | |
mbed_official | 15:a81a8d6c1dfe | 47 | #ifndef I2C_MASTER_H_INCLUDED |
mbed_official | 15:a81a8d6c1dfe | 48 | #define I2C_MASTER_H_INCLUDED |
mbed_official | 15:a81a8d6c1dfe | 49 | |
mbed_official | 15:a81a8d6c1dfe | 50 | #include "i2c_common.h" |
mbed_official | 15:a81a8d6c1dfe | 51 | #include <sercom.h> |
mbed_official | 15:a81a8d6c1dfe | 52 | #include <pinmux.h> |
mbed_official | 15:a81a8d6c1dfe | 53 | |
mbed_official | 15:a81a8d6c1dfe | 54 | #if I2C_MASTER_CALLBACK_MODE == true |
mbed_official | 15:a81a8d6c1dfe | 55 | # include <sercom_interrupt.h> |
mbed_official | 15:a81a8d6c1dfe | 56 | #endif |
mbed_official | 15:a81a8d6c1dfe | 57 | |
mbed_official | 15:a81a8d6c1dfe | 58 | #ifdef __cplusplus |
mbed_official | 15:a81a8d6c1dfe | 59 | extern "C" { |
mbed_official | 15:a81a8d6c1dfe | 60 | #endif |
mbed_official | 15:a81a8d6c1dfe | 61 | |
mbed_official | 15:a81a8d6c1dfe | 62 | #ifndef PINMUX_DEFAULT |
mbed_official | 15:a81a8d6c1dfe | 63 | # define PINMUX_DEFAULT 0 |
mbed_official | 15:a81a8d6c1dfe | 64 | #endif |
mbed_official | 15:a81a8d6c1dfe | 65 | |
mbed_official | 15:a81a8d6c1dfe | 66 | /** |
mbed_official | 15:a81a8d6c1dfe | 67 | * \addtogroup asfdoc_sam0_sercom_i2c_group |
mbed_official | 15:a81a8d6c1dfe | 68 | * |
mbed_official | 15:a81a8d6c1dfe | 69 | * @{ |
mbed_official | 15:a81a8d6c1dfe | 70 | */ |
mbed_official | 15:a81a8d6c1dfe | 71 | |
mbed_official | 15:a81a8d6c1dfe | 72 | /** |
mbed_official | 15:a81a8d6c1dfe | 73 | * \brief I<SUP>2</SUP>C master packet for read/write |
mbed_official | 15:a81a8d6c1dfe | 74 | * |
mbed_official | 15:a81a8d6c1dfe | 75 | * Structure to be used when transferring I<SUP>2</SUP>C master packets. |
mbed_official | 15:a81a8d6c1dfe | 76 | */ |
mbed_official | 15:a81a8d6c1dfe | 77 | struct i2c_master_packet { |
mbed_official | 15:a81a8d6c1dfe | 78 | /** Address to slave device. */ |
mbed_official | 15:a81a8d6c1dfe | 79 | uint16_t address; |
mbed_official | 15:a81a8d6c1dfe | 80 | /** Length of data array. */ |
mbed_official | 15:a81a8d6c1dfe | 81 | uint16_t data_length; |
mbed_official | 15:a81a8d6c1dfe | 82 | /** Data array containing all data to be transferred. */ |
mbed_official | 15:a81a8d6c1dfe | 83 | uint8_t *data; |
mbed_official | 15:a81a8d6c1dfe | 84 | /** Use 10-bit addressing. Set to false if the feature is not supported by the device. */ |
mbed_official | 15:a81a8d6c1dfe | 85 | bool ten_bit_address; |
mbed_official | 15:a81a8d6c1dfe | 86 | /** Use high speed transfer. Set to false if the feature is not supported by the device. */ |
mbed_official | 15:a81a8d6c1dfe | 87 | bool high_speed; |
mbed_official | 15:a81a8d6c1dfe | 88 | /** High speed mode master code (0000 1XXX), valid when high_speed is true. */ |
mbed_official | 15:a81a8d6c1dfe | 89 | uint8_t hs_master_code; |
mbed_official | 15:a81a8d6c1dfe | 90 | }; |
mbed_official | 15:a81a8d6c1dfe | 91 | |
mbed_official | 15:a81a8d6c1dfe | 92 | /** \brief Interrupt flags |
mbed_official | 15:a81a8d6c1dfe | 93 | * |
mbed_official | 15:a81a8d6c1dfe | 94 | * Flags used when reading or setting interrupt flags. |
mbed_official | 15:a81a8d6c1dfe | 95 | */ |
mbed_official | 15:a81a8d6c1dfe | 96 | enum i2c_master_interrupt_flag { |
mbed_official | 15:a81a8d6c1dfe | 97 | /** Interrupt flag used for write. */ |
mbed_official | 15:a81a8d6c1dfe | 98 | I2C_MASTER_INTERRUPT_WRITE = 0, |
mbed_official | 15:a81a8d6c1dfe | 99 | /** Interrupt flag used for read. */ |
mbed_official | 15:a81a8d6c1dfe | 100 | I2C_MASTER_INTERRUPT_READ = 1, |
mbed_official | 15:a81a8d6c1dfe | 101 | }; |
mbed_official | 15:a81a8d6c1dfe | 102 | |
mbed_official | 15:a81a8d6c1dfe | 103 | /** |
mbed_official | 15:a81a8d6c1dfe | 104 | * \brief Values for hold time after start bit. |
mbed_official | 15:a81a8d6c1dfe | 105 | * |
mbed_official | 15:a81a8d6c1dfe | 106 | * Values for the possible I<SUP>2</SUP>C master mode SDA internal hold times after start |
mbed_official | 15:a81a8d6c1dfe | 107 | * bit has been sent. |
mbed_official | 15:a81a8d6c1dfe | 108 | */ |
mbed_official | 15:a81a8d6c1dfe | 109 | enum i2c_master_start_hold_time { |
mbed_official | 15:a81a8d6c1dfe | 110 | /** Internal SDA hold time disabled. */ |
mbed_official | 15:a81a8d6c1dfe | 111 | I2C_MASTER_START_HOLD_TIME_DISABLED = SERCOM_I2CM_CTRLA_SDAHOLD(0), |
mbed_official | 15:a81a8d6c1dfe | 112 | /** Internal SDA hold time 50ns - 100ns. */ |
mbed_official | 15:a81a8d6c1dfe | 113 | I2C_MASTER_START_HOLD_TIME_50NS_100NS = SERCOM_I2CM_CTRLA_SDAHOLD(1), |
mbed_official | 15:a81a8d6c1dfe | 114 | /** Internal SDA hold time 300ns - 600ns. */ |
mbed_official | 15:a81a8d6c1dfe | 115 | I2C_MASTER_START_HOLD_TIME_300NS_600NS = SERCOM_I2CM_CTRLA_SDAHOLD(2), |
mbed_official | 15:a81a8d6c1dfe | 116 | /** Internal SDA hold time 400ns - 800ns. */ |
mbed_official | 15:a81a8d6c1dfe | 117 | I2C_MASTER_START_HOLD_TIME_400NS_800NS = SERCOM_I2CM_CTRLA_SDAHOLD(3), |
mbed_official | 15:a81a8d6c1dfe | 118 | }; |
mbed_official | 15:a81a8d6c1dfe | 119 | |
mbed_official | 15:a81a8d6c1dfe | 120 | /** |
mbed_official | 15:a81a8d6c1dfe | 121 | * \brief Values for inactive bus time-out. |
mbed_official | 15:a81a8d6c1dfe | 122 | * |
mbed_official | 15:a81a8d6c1dfe | 123 | * If the inactive bus time-out is enabled and the bus is inactive for |
mbed_official | 15:a81a8d6c1dfe | 124 | * longer than the time-out setting, the bus state logic will be set to idle. |
mbed_official | 15:a81a8d6c1dfe | 125 | */ |
mbed_official | 15:a81a8d6c1dfe | 126 | enum i2c_master_inactive_timeout { |
mbed_official | 15:a81a8d6c1dfe | 127 | /** Inactive bus time-out disabled. */ |
mbed_official | 15:a81a8d6c1dfe | 128 | I2C_MASTER_INACTIVE_TIMEOUT_DISABLED = SERCOM_I2CM_CTRLA_INACTOUT(0), |
mbed_official | 15:a81a8d6c1dfe | 129 | /** Inactive bus time-out 5-6 SCL cycle time-out. */ |
mbed_official | 15:a81a8d6c1dfe | 130 | I2C_MASTER_INACTIVE_TIMEOUT_55US = SERCOM_I2CM_CTRLA_INACTOUT(1), |
mbed_official | 15:a81a8d6c1dfe | 131 | /** Inactive bus time-out 10-11 SCL cycle time-out. */ |
mbed_official | 15:a81a8d6c1dfe | 132 | I2C_MASTER_INACTIVE_TIMEOUT_105US = SERCOM_I2CM_CTRLA_INACTOUT(2), |
mbed_official | 15:a81a8d6c1dfe | 133 | /** Inactive bus time-out 20-21 SCL cycle time-out. */ |
mbed_official | 15:a81a8d6c1dfe | 134 | I2C_MASTER_INACTIVE_TIMEOUT_205US = SERCOM_I2CM_CTRLA_INACTOUT(3), |
mbed_official | 15:a81a8d6c1dfe | 135 | }; |
mbed_official | 15:a81a8d6c1dfe | 136 | |
mbed_official | 15:a81a8d6c1dfe | 137 | /** |
mbed_official | 15:a81a8d6c1dfe | 138 | * \brief I<SUP>2</SUP>C frequencies |
mbed_official | 15:a81a8d6c1dfe | 139 | * |
mbed_official | 15:a81a8d6c1dfe | 140 | * Values for I<SUP>2</SUP>C speeds supported by the module. The driver |
mbed_official | 15:a81a8d6c1dfe | 141 | * will also support setting any other value, in which case set |
mbed_official | 15:a81a8d6c1dfe | 142 | * the value in the \ref i2c_master_config at desired value divided by 1000. |
mbed_official | 15:a81a8d6c1dfe | 143 | * |
mbed_official | 15:a81a8d6c1dfe | 144 | * Example: If 10KHz operation is required, give baud_rate in the configuration |
mbed_official | 15:a81a8d6c1dfe | 145 | * structure the value 10. |
mbed_official | 15:a81a8d6c1dfe | 146 | */ |
mbed_official | 15:a81a8d6c1dfe | 147 | enum i2c_master_baud_rate { |
mbed_official | 15:a81a8d6c1dfe | 148 | /** Baud rate at 100KHz (Standard-mode). */ |
mbed_official | 15:a81a8d6c1dfe | 149 | I2C_MASTER_BAUD_RATE_100KHZ = 100, |
mbed_official | 15:a81a8d6c1dfe | 150 | /** Baud rate at 400KHz (Fast-mode). */ |
mbed_official | 15:a81a8d6c1dfe | 151 | I2C_MASTER_BAUD_RATE_400KHZ = 400, |
mbed_official | 15:a81a8d6c1dfe | 152 | #ifdef FEATURE_I2C_FAST_MODE_PLUS_AND_HIGH_SPEED |
mbed_official | 15:a81a8d6c1dfe | 153 | /** Baud rate at 1MHz (Fast-mode Plus). */ |
mbed_official | 15:a81a8d6c1dfe | 154 | I2C_MASTER_BAUD_RATE_1000KHZ = 1000, |
mbed_official | 15:a81a8d6c1dfe | 155 | /** Baud rate at 3.4MHz (High-speed mode). */ |
mbed_official | 15:a81a8d6c1dfe | 156 | I2C_MASTER_BAUD_RATE_3400KHZ = 3400, |
mbed_official | 15:a81a8d6c1dfe | 157 | #endif |
mbed_official | 15:a81a8d6c1dfe | 158 | }; |
mbed_official | 15:a81a8d6c1dfe | 159 | |
mbed_official | 15:a81a8d6c1dfe | 160 | #ifdef FEATURE_I2C_FAST_MODE_PLUS_AND_HIGH_SPEED |
mbed_official | 15:a81a8d6c1dfe | 161 | /** |
mbed_official | 15:a81a8d6c1dfe | 162 | * \brief Enum for the transfer speed |
mbed_official | 15:a81a8d6c1dfe | 163 | * |
mbed_official | 15:a81a8d6c1dfe | 164 | * Enum for the transfer speed. |
mbed_official | 15:a81a8d6c1dfe | 165 | */ |
mbed_official | 15:a81a8d6c1dfe | 166 | enum i2c_master_transfer_speed { |
mbed_official | 15:a81a8d6c1dfe | 167 | /** Standard-mode (Sm) up to 100KHz and Fast-mode (Fm) up to 400KHz. */ |
mbed_official | 15:a81a8d6c1dfe | 168 | I2C_MASTER_SPEED_STANDARD_AND_FAST = SERCOM_I2CM_CTRLA_SPEED(0), |
mbed_official | 15:a81a8d6c1dfe | 169 | /** Fast-mode Plus (Fm+) up to 1MHz. */ |
mbed_official | 15:a81a8d6c1dfe | 170 | I2C_MASTER_SPEED_FAST_MODE_PLUS = SERCOM_I2CM_CTRLA_SPEED(1), |
mbed_official | 15:a81a8d6c1dfe | 171 | /** High-speed mode (Hs-mode) up to 3.4MHz. */ |
mbed_official | 15:a81a8d6c1dfe | 172 | I2C_MASTER_SPEED_HIGH_SPEED = SERCOM_I2CM_CTRLA_SPEED(2), |
mbed_official | 15:a81a8d6c1dfe | 173 | }; |
mbed_official | 15:a81a8d6c1dfe | 174 | #endif |
mbed_official | 15:a81a8d6c1dfe | 175 | |
mbed_official | 15:a81a8d6c1dfe | 176 | #if I2C_MASTER_CALLBACK_MODE == true |
mbed_official | 15:a81a8d6c1dfe | 177 | /** |
mbed_official | 15:a81a8d6c1dfe | 178 | * \brief Callback types |
mbed_official | 15:a81a8d6c1dfe | 179 | * |
mbed_official | 15:a81a8d6c1dfe | 180 | * The available callback types for the I<SUP>2</SUP>C master module. |
mbed_official | 15:a81a8d6c1dfe | 181 | */ |
mbed_official | 15:a81a8d6c1dfe | 182 | enum i2c_master_callback { |
mbed_official | 15:a81a8d6c1dfe | 183 | /** Callback for packet write complete. */ |
mbed_official | 15:a81a8d6c1dfe | 184 | I2C_MASTER_CALLBACK_WRITE_COMPLETE = 0, |
mbed_official | 15:a81a8d6c1dfe | 185 | /** Callback for packet read complete. */ |
mbed_official | 15:a81a8d6c1dfe | 186 | I2C_MASTER_CALLBACK_READ_COMPLETE = 1, |
mbed_official | 15:a81a8d6c1dfe | 187 | /** Callback for error. */ |
mbed_official | 15:a81a8d6c1dfe | 188 | I2C_MASTER_CALLBACK_ERROR = 2, |
mbed_official | 15:a81a8d6c1dfe | 189 | # if !defined(__DOXYGEN__) |
mbed_official | 15:a81a8d6c1dfe | 190 | /** Total number of callbacks. */ |
mbed_official | 15:a81a8d6c1dfe | 191 | _I2C_MASTER_CALLBACK_N = 3, |
mbed_official | 15:a81a8d6c1dfe | 192 | # endif |
mbed_official | 15:a81a8d6c1dfe | 193 | }; |
mbed_official | 15:a81a8d6c1dfe | 194 | |
mbed_official | 15:a81a8d6c1dfe | 195 | # if !defined(__DOXYGEN__) |
mbed_official | 15:a81a8d6c1dfe | 196 | /* Prototype for software module. */ |
mbed_official | 15:a81a8d6c1dfe | 197 | struct i2c_master_module; |
mbed_official | 15:a81a8d6c1dfe | 198 | |
mbed_official | 15:a81a8d6c1dfe | 199 | typedef void (*i2c_master_callback_t)( |
mbed_official | 15:a81a8d6c1dfe | 200 | struct i2c_master_module *const module); |
mbed_official | 15:a81a8d6c1dfe | 201 | # endif |
mbed_official | 15:a81a8d6c1dfe | 202 | #endif |
mbed_official | 15:a81a8d6c1dfe | 203 | |
mbed_official | 15:a81a8d6c1dfe | 204 | /** |
mbed_official | 15:a81a8d6c1dfe | 205 | * \brief SERCOM I<SUP>2</SUP>C Master driver software device instance structure. |
mbed_official | 15:a81a8d6c1dfe | 206 | * |
mbed_official | 15:a81a8d6c1dfe | 207 | * SERCOM I<SUP>2</SUP>C Master driver software instance structure, used to |
mbed_official | 15:a81a8d6c1dfe | 208 | * retain software state information of an associated hardware module instance. |
mbed_official | 15:a81a8d6c1dfe | 209 | * |
mbed_official | 15:a81a8d6c1dfe | 210 | * \note The fields of this structure should not be altered by the user |
mbed_official | 15:a81a8d6c1dfe | 211 | * application; they are reserved for module-internal use only. |
mbed_official | 15:a81a8d6c1dfe | 212 | */ |
mbed_official | 15:a81a8d6c1dfe | 213 | struct i2c_master_module { |
mbed_official | 15:a81a8d6c1dfe | 214 | #if !defined(__DOXYGEN__) |
mbed_official | 15:a81a8d6c1dfe | 215 | /** Hardware instance initialized for the struct. */ |
mbed_official | 15:a81a8d6c1dfe | 216 | Sercom *hw; |
mbed_official | 15:a81a8d6c1dfe | 217 | /** Module lock. */ |
mbed_official | 15:a81a8d6c1dfe | 218 | volatile bool locked; |
mbed_official | 15:a81a8d6c1dfe | 219 | /** Unknown bus state timeout. */ |
mbed_official | 15:a81a8d6c1dfe | 220 | uint16_t unknown_bus_state_timeout; |
mbed_official | 15:a81a8d6c1dfe | 221 | /** Buffer write timeout value. */ |
mbed_official | 15:a81a8d6c1dfe | 222 | uint16_t buffer_timeout; |
mbed_official | 15:a81a8d6c1dfe | 223 | /** If true, stop condition will be sent after a read/write. */ |
mbed_official | 15:a81a8d6c1dfe | 224 | bool send_stop; |
mbed_official | 15:a81a8d6c1dfe | 225 | /** If true, nack signal will be sent after a read/write. */ |
mbed_official | 15:a81a8d6c1dfe | 226 | bool send_nack; |
mbed_official | 15:a81a8d6c1dfe | 227 | # if I2C_MASTER_CALLBACK_MODE == true |
mbed_official | 15:a81a8d6c1dfe | 228 | /** Pointers to callback functions. */ |
mbed_official | 15:a81a8d6c1dfe | 229 | volatile i2c_master_callback_t callbacks[_I2C_MASTER_CALLBACK_N]; |
mbed_official | 15:a81a8d6c1dfe | 230 | /** Mask for registered callbacks. */ |
mbed_official | 15:a81a8d6c1dfe | 231 | volatile uint8_t registered_callback; |
mbed_official | 15:a81a8d6c1dfe | 232 | /** Mask for enabled callbacks. */ |
mbed_official | 15:a81a8d6c1dfe | 233 | volatile uint8_t enabled_callback; |
mbed_official | 15:a81a8d6c1dfe | 234 | /** The total number of bytes to transfer. */ |
mbed_official | 15:a81a8d6c1dfe | 235 | volatile uint16_t buffer_length; |
mbed_official | 15:a81a8d6c1dfe | 236 | /** |
mbed_official | 15:a81a8d6c1dfe | 237 | * Counter used for bytes left to send in write and to count number of |
mbed_official | 15:a81a8d6c1dfe | 238 | * obtained bytes in read. |
mbed_official | 15:a81a8d6c1dfe | 239 | */ |
mbed_official | 15:a81a8d6c1dfe | 240 | volatile uint16_t buffer_remaining; |
mbed_official | 15:a81a8d6c1dfe | 241 | /** Data buffer for packet write and read. */ |
mbed_official | 15:a81a8d6c1dfe | 242 | volatile uint8_t *buffer; |
mbed_official | 15:a81a8d6c1dfe | 243 | /** Save direction of async request. 1 = read, 0 = write. */ |
mbed_official | 15:a81a8d6c1dfe | 244 | volatile enum i2c_transfer_direction transfer_direction; |
mbed_official | 15:a81a8d6c1dfe | 245 | /** Status for status read back in error callback. */ |
mbed_official | 15:a81a8d6c1dfe | 246 | volatile enum status_code status; |
mbed_official | 15:a81a8d6c1dfe | 247 | # endif |
mbed_official | 15:a81a8d6c1dfe | 248 | #endif |
mbed_official | 15:a81a8d6c1dfe | 249 | }; |
mbed_official | 15:a81a8d6c1dfe | 250 | |
mbed_official | 15:a81a8d6c1dfe | 251 | /** |
mbed_official | 15:a81a8d6c1dfe | 252 | * \brief Configuration structure for the I<SUP>2</SUP>C Master device |
mbed_official | 15:a81a8d6c1dfe | 253 | * |
mbed_official | 15:a81a8d6c1dfe | 254 | * This is the configuration structure for the I<SUP>2</SUP>C Master device. It |
mbed_official | 15:a81a8d6c1dfe | 255 | * is used as an argument for \ref i2c_master_init to provide the desired |
mbed_official | 15:a81a8d6c1dfe | 256 | * configurations for the module. The structure should be initialized using the |
mbed_official | 15:a81a8d6c1dfe | 257 | * \ref i2c_master_get_config_defaults . |
mbed_official | 15:a81a8d6c1dfe | 258 | */ |
mbed_official | 15:a81a8d6c1dfe | 259 | struct i2c_master_config { |
mbed_official | 15:a81a8d6c1dfe | 260 | /** Baud rate (in KHz) for I<SUP>2</SUP>C operations in |
mbed_official | 15:a81a8d6c1dfe | 261 | * standard-mode, Fast-mode and Fast-mode Plus Transfers, |
mbed_official | 15:a81a8d6c1dfe | 262 | * \ref i2c_master_baud_rate. */ |
mbed_official | 15:a81a8d6c1dfe | 263 | uint32_t baud_rate; |
mbed_official | 15:a81a8d6c1dfe | 264 | #ifdef FEATURE_I2C_FAST_MODE_PLUS_AND_HIGH_SPEED |
mbed_official | 15:a81a8d6c1dfe | 265 | /** Baud rate (in KHz) for I<SUP>2</SUP>C operations in |
mbed_official | 15:a81a8d6c1dfe | 266 | * High-speed mode, \ref i2c_master_baud_rate. */ |
mbed_official | 15:a81a8d6c1dfe | 267 | uint32_t baud_rate_high_speed; |
mbed_official | 15:a81a8d6c1dfe | 268 | /** Transfer speed mode. */ |
mbed_official | 15:a81a8d6c1dfe | 269 | enum i2c_master_transfer_speed transfer_speed; |
mbed_official | 15:a81a8d6c1dfe | 270 | #endif |
mbed_official | 15:a81a8d6c1dfe | 271 | /** GCLK generator to use as clock source. */ |
mbed_official | 15:a81a8d6c1dfe | 272 | enum gclk_generator generator_source; |
mbed_official | 15:a81a8d6c1dfe | 273 | /** Bus hold time after start signal on data line. */ |
mbed_official | 15:a81a8d6c1dfe | 274 | enum i2c_master_start_hold_time start_hold_time; |
mbed_official | 15:a81a8d6c1dfe | 275 | /** Unknown bus state \ref asfdoc_sam0_sercom_i2c_unknown_bus_timeout "timeout". */ |
mbed_official | 15:a81a8d6c1dfe | 276 | uint16_t unknown_bus_state_timeout; |
mbed_official | 15:a81a8d6c1dfe | 277 | /** Timeout for packet write to wait for slave. */ |
mbed_official | 15:a81a8d6c1dfe | 278 | uint16_t buffer_timeout; |
mbed_official | 15:a81a8d6c1dfe | 279 | /** Set to keep module active in sleep modes. */ |
mbed_official | 15:a81a8d6c1dfe | 280 | bool run_in_standby; |
mbed_official | 15:a81a8d6c1dfe | 281 | /** PAD0 (SDA) pinmux. */ |
mbed_official | 15:a81a8d6c1dfe | 282 | uint32_t pinmux_pad0; |
mbed_official | 15:a81a8d6c1dfe | 283 | /** PAD1 (SCL) pinmux. */ |
mbed_official | 15:a81a8d6c1dfe | 284 | uint32_t pinmux_pad1; |
mbed_official | 15:a81a8d6c1dfe | 285 | /** Set to enable SCL low time-out. */ |
mbed_official | 15:a81a8d6c1dfe | 286 | bool scl_low_timeout; |
mbed_official | 15:a81a8d6c1dfe | 287 | /** Inactive bus time out. */ |
mbed_official | 15:a81a8d6c1dfe | 288 | enum i2c_master_inactive_timeout inactive_timeout; |
mbed_official | 15:a81a8d6c1dfe | 289 | #ifdef FEATURE_I2C_SCL_STRETCH_MODE |
mbed_official | 15:a81a8d6c1dfe | 290 | /** Set to enable SCL stretch only after ACK bit (required for high speed). */ |
mbed_official | 15:a81a8d6c1dfe | 291 | bool scl_stretch_only_after_ack_bit; |
mbed_official | 15:a81a8d6c1dfe | 292 | #endif |
mbed_official | 15:a81a8d6c1dfe | 293 | #ifdef FEATURE_I2C_SCL_EXTEND_TIMEOUT |
mbed_official | 15:a81a8d6c1dfe | 294 | /** Set to enable slave SCL low extend time-out. */ |
mbed_official | 15:a81a8d6c1dfe | 295 | bool slave_scl_low_extend_timeout; |
mbed_official | 15:a81a8d6c1dfe | 296 | /** Set to enable maser SCL low extend time-out. */ |
mbed_official | 15:a81a8d6c1dfe | 297 | bool master_scl_low_extend_timeout; |
mbed_official | 15:a81a8d6c1dfe | 298 | #endif |
mbed_official | 15:a81a8d6c1dfe | 299 | /** Get more accurate BAUD, considering rise time(required for standard-mode and Fast-mode). */ |
mbed_official | 15:a81a8d6c1dfe | 300 | uint16_t sda_scl_rise_time_ns; |
mbed_official | 15:a81a8d6c1dfe | 301 | }; |
mbed_official | 15:a81a8d6c1dfe | 302 | |
mbed_official | 15:a81a8d6c1dfe | 303 | /** |
mbed_official | 15:a81a8d6c1dfe | 304 | * \name Lock/Unlock |
mbed_official | 15:a81a8d6c1dfe | 305 | * @{ |
mbed_official | 15:a81a8d6c1dfe | 306 | */ |
mbed_official | 15:a81a8d6c1dfe | 307 | |
mbed_official | 15:a81a8d6c1dfe | 308 | /** |
mbed_official | 15:a81a8d6c1dfe | 309 | * \brief Attempt to get lock on driver instance |
mbed_official | 15:a81a8d6c1dfe | 310 | * |
mbed_official | 15:a81a8d6c1dfe | 311 | * This function checks the instance's lock, which indicates whether or not it |
mbed_official | 15:a81a8d6c1dfe | 312 | * is currently in use, and sets the lock if it was not already set. |
mbed_official | 15:a81a8d6c1dfe | 313 | * |
mbed_official | 15:a81a8d6c1dfe | 314 | * The purpose of this is to enable exclusive access to driver instances, so |
mbed_official | 15:a81a8d6c1dfe | 315 | * that, e.g., transactions by different services will not interfere with each |
mbed_official | 15:a81a8d6c1dfe | 316 | * other. |
mbed_official | 15:a81a8d6c1dfe | 317 | * |
mbed_official | 15:a81a8d6c1dfe | 318 | * \param[in,out] module Pointer to the driver instance to lock |
mbed_official | 15:a81a8d6c1dfe | 319 | * |
mbed_official | 15:a81a8d6c1dfe | 320 | * \retval STATUS_OK If the module was locked |
mbed_official | 15:a81a8d6c1dfe | 321 | * \retval STATUS_BUSY If the module was already locked |
mbed_official | 15:a81a8d6c1dfe | 322 | */ |
mbed_official | 15:a81a8d6c1dfe | 323 | static inline enum status_code i2c_master_lock( |
mbed_official | 15:a81a8d6c1dfe | 324 | struct i2c_master_module *const module) |
mbed_official | 15:a81a8d6c1dfe | 325 | { |
mbed_official | 15:a81a8d6c1dfe | 326 | enum status_code status; |
mbed_official | 15:a81a8d6c1dfe | 327 | |
mbed_official | 15:a81a8d6c1dfe | 328 | system_interrupt_enter_critical_section(); |
mbed_official | 15:a81a8d6c1dfe | 329 | |
mbed_official | 15:a81a8d6c1dfe | 330 | if (module->locked) { |
mbed_official | 15:a81a8d6c1dfe | 331 | status = STATUS_BUSY; |
mbed_official | 15:a81a8d6c1dfe | 332 | } else { |
mbed_official | 15:a81a8d6c1dfe | 333 | module->locked = true; |
mbed_official | 15:a81a8d6c1dfe | 334 | status = STATUS_OK; |
mbed_official | 15:a81a8d6c1dfe | 335 | } |
mbed_official | 15:a81a8d6c1dfe | 336 | |
mbed_official | 15:a81a8d6c1dfe | 337 | system_interrupt_leave_critical_section(); |
mbed_official | 15:a81a8d6c1dfe | 338 | |
mbed_official | 15:a81a8d6c1dfe | 339 | return status; |
mbed_official | 15:a81a8d6c1dfe | 340 | } |
mbed_official | 15:a81a8d6c1dfe | 341 | |
mbed_official | 15:a81a8d6c1dfe | 342 | /** |
mbed_official | 15:a81a8d6c1dfe | 343 | * \brief Unlock driver instance |
mbed_official | 15:a81a8d6c1dfe | 344 | * |
mbed_official | 15:a81a8d6c1dfe | 345 | * This function clears the instance lock, indicating that it is available for |
mbed_official | 15:a81a8d6c1dfe | 346 | * use. |
mbed_official | 15:a81a8d6c1dfe | 347 | * |
mbed_official | 15:a81a8d6c1dfe | 348 | * \param[in,out] module Pointer to the driver instance to lock |
mbed_official | 15:a81a8d6c1dfe | 349 | * |
mbed_official | 15:a81a8d6c1dfe | 350 | * \retval STATUS_OK If the module was locked |
mbed_official | 15:a81a8d6c1dfe | 351 | * \retval STATUS_BUSY If the module was already locked |
mbed_official | 15:a81a8d6c1dfe | 352 | */ |
mbed_official | 15:a81a8d6c1dfe | 353 | static inline void i2c_master_unlock(struct i2c_master_module *const module) |
mbed_official | 15:a81a8d6c1dfe | 354 | { |
mbed_official | 15:a81a8d6c1dfe | 355 | module->locked = false; |
mbed_official | 15:a81a8d6c1dfe | 356 | } |
mbed_official | 15:a81a8d6c1dfe | 357 | |
mbed_official | 15:a81a8d6c1dfe | 358 | /** @} */ |
mbed_official | 15:a81a8d6c1dfe | 359 | |
mbed_official | 15:a81a8d6c1dfe | 360 | /** |
mbed_official | 15:a81a8d6c1dfe | 361 | * \name Configuration and Initialization |
mbed_official | 15:a81a8d6c1dfe | 362 | * @{ |
mbed_official | 15:a81a8d6c1dfe | 363 | */ |
mbed_official | 15:a81a8d6c1dfe | 364 | |
mbed_official | 15:a81a8d6c1dfe | 365 | /** |
mbed_official | 15:a81a8d6c1dfe | 366 | * \brief Returns the synchronization status of the module |
mbed_official | 15:a81a8d6c1dfe | 367 | * |
mbed_official | 15:a81a8d6c1dfe | 368 | * Returns the synchronization status of the module. |
mbed_official | 15:a81a8d6c1dfe | 369 | * |
mbed_official | 15:a81a8d6c1dfe | 370 | * \param[in] module Pointer to software module structure |
mbed_official | 15:a81a8d6c1dfe | 371 | * |
mbed_official | 15:a81a8d6c1dfe | 372 | * \return Status of the synchronization. |
mbed_official | 15:a81a8d6c1dfe | 373 | * \retval true Module is busy synchronizing |
mbed_official | 15:a81a8d6c1dfe | 374 | * \retval false Module is not synchronizing |
mbed_official | 15:a81a8d6c1dfe | 375 | */ |
mbed_official | 15:a81a8d6c1dfe | 376 | static inline bool i2c_master_is_syncing ( |
mbed_official | 15:a81a8d6c1dfe | 377 | const struct i2c_master_module *const module) |
mbed_official | 15:a81a8d6c1dfe | 378 | { |
mbed_official | 15:a81a8d6c1dfe | 379 | /* Sanity check. */ |
mbed_official | 15:a81a8d6c1dfe | 380 | Assert(module); |
mbed_official | 15:a81a8d6c1dfe | 381 | Assert(module->hw); |
mbed_official | 15:a81a8d6c1dfe | 382 | |
mbed_official | 15:a81a8d6c1dfe | 383 | SercomI2cm *const i2c_hw = &(module->hw->I2CM); |
mbed_official | 15:a81a8d6c1dfe | 384 | |
mbed_official | 15:a81a8d6c1dfe | 385 | #if defined(FEATURE_SERCOM_SYNCBUSY_SCHEME_VERSION_1) |
mbed_official | 15:a81a8d6c1dfe | 386 | return (i2c_hw->STATUS.reg & SERCOM_I2CM_STATUS_SYNCBUSY); |
mbed_official | 15:a81a8d6c1dfe | 387 | #elif defined(FEATURE_SERCOM_SYNCBUSY_SCHEME_VERSION_2) |
mbed_official | 15:a81a8d6c1dfe | 388 | return (i2c_hw->SYNCBUSY.reg & SERCOM_I2CM_SYNCBUSY_MASK); |
mbed_official | 15:a81a8d6c1dfe | 389 | #else |
mbed_official | 15:a81a8d6c1dfe | 390 | # error Unknown SERCOM SYNCBUSY scheme! |
mbed_official | 15:a81a8d6c1dfe | 391 | #endif |
mbed_official | 15:a81a8d6c1dfe | 392 | } |
mbed_official | 15:a81a8d6c1dfe | 393 | |
mbed_official | 15:a81a8d6c1dfe | 394 | #if !defined(__DOXYGEN__) |
mbed_official | 15:a81a8d6c1dfe | 395 | /** |
mbed_official | 15:a81a8d6c1dfe | 396 | * \internal |
mbed_official | 15:a81a8d6c1dfe | 397 | * Wait for hardware module to sync |
mbed_official | 15:a81a8d6c1dfe | 398 | * |
mbed_official | 15:a81a8d6c1dfe | 399 | * \param[in] module Pointer to software module structure |
mbed_official | 15:a81a8d6c1dfe | 400 | */ |
mbed_official | 15:a81a8d6c1dfe | 401 | static void _i2c_master_wait_for_sync( |
mbed_official | 15:a81a8d6c1dfe | 402 | const struct i2c_master_module *const module) |
mbed_official | 15:a81a8d6c1dfe | 403 | { |
mbed_official | 15:a81a8d6c1dfe | 404 | /* Sanity check. */ |
mbed_official | 15:a81a8d6c1dfe | 405 | Assert(module); |
mbed_official | 15:a81a8d6c1dfe | 406 | |
mbed_official | 15:a81a8d6c1dfe | 407 | while (i2c_master_is_syncing(module)) { |
mbed_official | 15:a81a8d6c1dfe | 408 | /* Wait for I2C module to sync. */ |
mbed_official | 15:a81a8d6c1dfe | 409 | } |
mbed_official | 15:a81a8d6c1dfe | 410 | } |
mbed_official | 15:a81a8d6c1dfe | 411 | #endif |
mbed_official | 15:a81a8d6c1dfe | 412 | |
mbed_official | 15:a81a8d6c1dfe | 413 | /** |
mbed_official | 15:a81a8d6c1dfe | 414 | * \brief Gets the I<SUP>2</SUP>C master default configurations |
mbed_official | 15:a81a8d6c1dfe | 415 | * |
mbed_official | 15:a81a8d6c1dfe | 416 | * Use to initialize the configuration structure to known default values. |
mbed_official | 15:a81a8d6c1dfe | 417 | * |
mbed_official | 15:a81a8d6c1dfe | 418 | * The default configuration is as follows: |
mbed_official | 15:a81a8d6c1dfe | 419 | * - Baudrate 100KHz |
mbed_official | 15:a81a8d6c1dfe | 420 | * - GCLK generator 0 |
mbed_official | 15:a81a8d6c1dfe | 421 | * - Do not run in standby |
mbed_official | 15:a81a8d6c1dfe | 422 | * - Start bit hold time 300ns - 600ns |
mbed_official | 15:a81a8d6c1dfe | 423 | * - Buffer timeout = 65535 |
mbed_official | 15:a81a8d6c1dfe | 424 | * - Unknown bus status timeout = 65535 |
mbed_official | 15:a81a8d6c1dfe | 425 | * - Do not run in standby |
mbed_official | 15:a81a8d6c1dfe | 426 | * - PINMUX_DEFAULT for SERCOM pads |
mbed_official | 15:a81a8d6c1dfe | 427 | * |
mbed_official | 15:a81a8d6c1dfe | 428 | * Those default configuration only available if the device supports it: |
mbed_official | 15:a81a8d6c1dfe | 429 | * - High speed baudrate 3.4MHz |
mbed_official | 15:a81a8d6c1dfe | 430 | * - Standard-mode and Fast-mode transfer speed |
mbed_official | 15:a81a8d6c1dfe | 431 | * - SCL stretch disabled |
mbed_official | 15:a81a8d6c1dfe | 432 | * - slave SCL low extend time-out disabled |
mbed_official | 15:a81a8d6c1dfe | 433 | * - maser SCL low extend time-out disabled |
mbed_official | 15:a81a8d6c1dfe | 434 | * |
mbed_official | 15:a81a8d6c1dfe | 435 | * \param[out] config Pointer to configuration structure to be initiated |
mbed_official | 15:a81a8d6c1dfe | 436 | */ |
mbed_official | 15:a81a8d6c1dfe | 437 | static inline void i2c_master_get_config_defaults( |
mbed_official | 15:a81a8d6c1dfe | 438 | struct i2c_master_config *const config) |
mbed_official | 15:a81a8d6c1dfe | 439 | { |
mbed_official | 15:a81a8d6c1dfe | 440 | /*Sanity check argument. */ |
mbed_official | 15:a81a8d6c1dfe | 441 | Assert(config); |
mbed_official | 15:a81a8d6c1dfe | 442 | config->baud_rate = I2C_MASTER_BAUD_RATE_100KHZ; |
mbed_official | 15:a81a8d6c1dfe | 443 | #ifdef FEATURE_I2C_FAST_MODE_PLUS_AND_HIGH_SPEED |
mbed_official | 15:a81a8d6c1dfe | 444 | config->baud_rate_high_speed = I2C_MASTER_BAUD_RATE_3400KHZ; |
mbed_official | 15:a81a8d6c1dfe | 445 | config->transfer_speed = I2C_MASTER_SPEED_STANDARD_AND_FAST; |
mbed_official | 15:a81a8d6c1dfe | 446 | #endif |
mbed_official | 15:a81a8d6c1dfe | 447 | config->generator_source = GCLK_GENERATOR_0; |
mbed_official | 15:a81a8d6c1dfe | 448 | config->run_in_standby = false; |
mbed_official | 15:a81a8d6c1dfe | 449 | config->start_hold_time = I2C_MASTER_START_HOLD_TIME_300NS_600NS; |
mbed_official | 15:a81a8d6c1dfe | 450 | config->buffer_timeout = 65535; |
mbed_official | 15:a81a8d6c1dfe | 451 | config->unknown_bus_state_timeout = 65535; |
mbed_official | 15:a81a8d6c1dfe | 452 | config->pinmux_pad0 = PINMUX_DEFAULT; |
mbed_official | 15:a81a8d6c1dfe | 453 | config->pinmux_pad1 = PINMUX_DEFAULT; |
mbed_official | 15:a81a8d6c1dfe | 454 | config->scl_low_timeout = false; |
mbed_official | 15:a81a8d6c1dfe | 455 | config->inactive_timeout = I2C_MASTER_INACTIVE_TIMEOUT_DISABLED; |
mbed_official | 15:a81a8d6c1dfe | 456 | #ifdef FEATURE_I2C_SCL_STRETCH_MODE |
mbed_official | 15:a81a8d6c1dfe | 457 | config->scl_stretch_only_after_ack_bit = false; |
mbed_official | 15:a81a8d6c1dfe | 458 | #endif |
mbed_official | 15:a81a8d6c1dfe | 459 | #ifdef FEATURE_I2C_SCL_EXTEND_TIMEOUT |
mbed_official | 15:a81a8d6c1dfe | 460 | config->slave_scl_low_extend_timeout = false; |
mbed_official | 15:a81a8d6c1dfe | 461 | config->master_scl_low_extend_timeout = false; |
mbed_official | 15:a81a8d6c1dfe | 462 | #endif |
mbed_official | 15:a81a8d6c1dfe | 463 | /* The typical value is 215ns */ |
mbed_official | 15:a81a8d6c1dfe | 464 | config->sda_scl_rise_time_ns = 215; |
mbed_official | 15:a81a8d6c1dfe | 465 | } |
mbed_official | 15:a81a8d6c1dfe | 466 | |
mbed_official | 15:a81a8d6c1dfe | 467 | enum status_code i2c_master_init( |
mbed_official | 15:a81a8d6c1dfe | 468 | struct i2c_master_module *const module, |
mbed_official | 15:a81a8d6c1dfe | 469 | Sercom *const hw, |
mbed_official | 15:a81a8d6c1dfe | 470 | const struct i2c_master_config *const config); |
mbed_official | 15:a81a8d6c1dfe | 471 | |
mbed_official | 15:a81a8d6c1dfe | 472 | /** |
mbed_official | 15:a81a8d6c1dfe | 473 | * \brief Enables the I<SUP>2</SUP>C module |
mbed_official | 15:a81a8d6c1dfe | 474 | * |
mbed_official | 15:a81a8d6c1dfe | 475 | * Enables the requested I<SUP>2</SUP>C module and set the bus state to IDLE |
mbed_official | 15:a81a8d6c1dfe | 476 | * after the specified \ref asfdoc_sam0_sercom_i2c_timeout "timeout" period if no |
mbed_official | 15:a81a8d6c1dfe | 477 | * stop bit is detected. |
mbed_official | 15:a81a8d6c1dfe | 478 | * |
mbed_official | 15:a81a8d6c1dfe | 479 | * \param[in] module Pointer to the software module struct |
mbed_official | 15:a81a8d6c1dfe | 480 | */ |
mbed_official | 15:a81a8d6c1dfe | 481 | static inline void i2c_master_enable( |
mbed_official | 15:a81a8d6c1dfe | 482 | const struct i2c_master_module *const module) |
mbed_official | 15:a81a8d6c1dfe | 483 | { |
mbed_official | 15:a81a8d6c1dfe | 484 | /* Sanity check of arguments. */ |
mbed_official | 15:a81a8d6c1dfe | 485 | Assert(module); |
mbed_official | 15:a81a8d6c1dfe | 486 | Assert(module->hw); |
mbed_official | 15:a81a8d6c1dfe | 487 | |
mbed_official | 15:a81a8d6c1dfe | 488 | SercomI2cm *const i2c_module = &(module->hw->I2CM); |
mbed_official | 15:a81a8d6c1dfe | 489 | |
mbed_official | 15:a81a8d6c1dfe | 490 | /* Timeout counter used to force bus state. */ |
mbed_official | 15:a81a8d6c1dfe | 491 | uint32_t timeout_counter = 0; |
mbed_official | 15:a81a8d6c1dfe | 492 | |
mbed_official | 15:a81a8d6c1dfe | 493 | /* Wait for module to sync. */ |
mbed_official | 15:a81a8d6c1dfe | 494 | _i2c_master_wait_for_sync(module); |
mbed_official | 15:a81a8d6c1dfe | 495 | |
mbed_official | 15:a81a8d6c1dfe | 496 | /* Enable module. */ |
mbed_official | 15:a81a8d6c1dfe | 497 | i2c_module->CTRLA.reg |= SERCOM_I2CM_CTRLA_ENABLE; |
mbed_official | 15:a81a8d6c1dfe | 498 | |
mbed_official | 15:a81a8d6c1dfe | 499 | #if I2C_MASTER_CALLBACK_MODE == true |
mbed_official | 15:a81a8d6c1dfe | 500 | /* Enable module interrupts */ |
mbed_official | 15:a81a8d6c1dfe | 501 | system_interrupt_enable(_sercom_get_interrupt_vector(module->hw)); |
mbed_official | 15:a81a8d6c1dfe | 502 | #endif |
mbed_official | 15:a81a8d6c1dfe | 503 | /* Start timeout if bus state is unknown. */ |
mbed_official | 15:a81a8d6c1dfe | 504 | while (!(i2c_module->STATUS.reg & SERCOM_I2CM_STATUS_BUSSTATE(1))) { |
mbed_official | 15:a81a8d6c1dfe | 505 | timeout_counter++; |
mbed_official | 15:a81a8d6c1dfe | 506 | if(timeout_counter >= (module->unknown_bus_state_timeout)) { |
mbed_official | 15:a81a8d6c1dfe | 507 | /* Timeout, force bus state to idle. */ |
mbed_official | 15:a81a8d6c1dfe | 508 | i2c_module->STATUS.reg = SERCOM_I2CM_STATUS_BUSSTATE(1); |
mbed_official | 15:a81a8d6c1dfe | 509 | /* Workaround #1 */ |
mbed_official | 15:a81a8d6c1dfe | 510 | return; |
mbed_official | 15:a81a8d6c1dfe | 511 | } |
mbed_official | 15:a81a8d6c1dfe | 512 | } |
mbed_official | 15:a81a8d6c1dfe | 513 | } |
mbed_official | 15:a81a8d6c1dfe | 514 | |
mbed_official | 15:a81a8d6c1dfe | 515 | /** |
mbed_official | 15:a81a8d6c1dfe | 516 | * \brief Disable the I<SUP>2</SUP>C module |
mbed_official | 15:a81a8d6c1dfe | 517 | * |
mbed_official | 15:a81a8d6c1dfe | 518 | * Disables the requested I<SUP>2</SUP>C module. |
mbed_official | 15:a81a8d6c1dfe | 519 | * |
mbed_official | 15:a81a8d6c1dfe | 520 | * \param[in] module Pointer to the software module struct |
mbed_official | 15:a81a8d6c1dfe | 521 | */ |
mbed_official | 15:a81a8d6c1dfe | 522 | static inline void i2c_master_disable( |
mbed_official | 15:a81a8d6c1dfe | 523 | const struct i2c_master_module *const module) |
mbed_official | 15:a81a8d6c1dfe | 524 | { |
mbed_official | 15:a81a8d6c1dfe | 525 | /* Sanity check of arguments. */ |
mbed_official | 15:a81a8d6c1dfe | 526 | Assert(module); |
mbed_official | 15:a81a8d6c1dfe | 527 | Assert(module->hw); |
mbed_official | 15:a81a8d6c1dfe | 528 | |
mbed_official | 15:a81a8d6c1dfe | 529 | SercomI2cm *const i2c_module = &(module->hw->I2CM); |
mbed_official | 15:a81a8d6c1dfe | 530 | |
mbed_official | 15:a81a8d6c1dfe | 531 | /* Wait for module to sync. */ |
mbed_official | 15:a81a8d6c1dfe | 532 | _i2c_master_wait_for_sync(module); |
mbed_official | 15:a81a8d6c1dfe | 533 | |
mbed_official | 15:a81a8d6c1dfe | 534 | /* Disable module. */ |
mbed_official | 15:a81a8d6c1dfe | 535 | i2c_module->CTRLA.reg &= ~SERCOM_I2CM_CTRLA_ENABLE; |
mbed_official | 15:a81a8d6c1dfe | 536 | |
mbed_official | 15:a81a8d6c1dfe | 537 | #if I2C_MASTER_CALLBACK_MODE == true |
mbed_official | 15:a81a8d6c1dfe | 538 | /* Disable module interrupts */ |
mbed_official | 15:a81a8d6c1dfe | 539 | system_interrupt_disable(_sercom_get_interrupt_vector(module->hw)); |
mbed_official | 15:a81a8d6c1dfe | 540 | #endif |
mbed_official | 15:a81a8d6c1dfe | 541 | } |
mbed_official | 15:a81a8d6c1dfe | 542 | |
mbed_official | 15:a81a8d6c1dfe | 543 | void i2c_master_reset(struct i2c_master_module *const module); |
mbed_official | 15:a81a8d6c1dfe | 544 | |
mbed_official | 15:a81a8d6c1dfe | 545 | /** @} */ |
mbed_official | 15:a81a8d6c1dfe | 546 | |
mbed_official | 15:a81a8d6c1dfe | 547 | /** |
mbed_official | 15:a81a8d6c1dfe | 548 | * \name Read and Write |
mbed_official | 15:a81a8d6c1dfe | 549 | * @{ |
mbed_official | 15:a81a8d6c1dfe | 550 | */ |
mbed_official | 15:a81a8d6c1dfe | 551 | |
mbed_official | 15:a81a8d6c1dfe | 552 | enum status_code i2c_master_read_packet_wait( |
mbed_official | 15:a81a8d6c1dfe | 553 | struct i2c_master_module *const module, |
mbed_official | 15:a81a8d6c1dfe | 554 | struct i2c_master_packet *const packet); |
mbed_official | 15:a81a8d6c1dfe | 555 | |
mbed_official | 15:a81a8d6c1dfe | 556 | enum status_code i2c_master_read_packet_wait_no_stop( |
mbed_official | 15:a81a8d6c1dfe | 557 | struct i2c_master_module *const module, |
mbed_official | 15:a81a8d6c1dfe | 558 | struct i2c_master_packet *const packet); |
mbed_official | 15:a81a8d6c1dfe | 559 | |
mbed_official | 15:a81a8d6c1dfe | 560 | enum status_code i2c_master_write_packet_wait( |
mbed_official | 15:a81a8d6c1dfe | 561 | struct i2c_master_module *const module, |
mbed_official | 15:a81a8d6c1dfe | 562 | struct i2c_master_packet *const packet); |
mbed_official | 15:a81a8d6c1dfe | 563 | |
mbed_official | 15:a81a8d6c1dfe | 564 | enum status_code i2c_master_write_packet_wait_no_stop( |
mbed_official | 15:a81a8d6c1dfe | 565 | struct i2c_master_module *const module, |
mbed_official | 15:a81a8d6c1dfe | 566 | struct i2c_master_packet *const packet); |
mbed_official | 15:a81a8d6c1dfe | 567 | |
mbed_official | 15:a81a8d6c1dfe | 568 | void i2c_master_send_stop(struct i2c_master_module *const module); |
mbed_official | 15:a81a8d6c1dfe | 569 | |
mbed_official | 15:a81a8d6c1dfe | 570 | void i2c_master_send_nack(struct i2c_master_module *const module); |
mbed_official | 15:a81a8d6c1dfe | 571 | |
mbed_official | 15:a81a8d6c1dfe | 572 | enum status_code i2c_master_read_byte( |
mbed_official | 15:a81a8d6c1dfe | 573 | struct i2c_master_module *const module, |
mbed_official | 15:a81a8d6c1dfe | 574 | uint8_t *byte); |
mbed_official | 15:a81a8d6c1dfe | 575 | |
mbed_official | 15:a81a8d6c1dfe | 576 | enum status_code i2c_master_write_byte( |
mbed_official | 15:a81a8d6c1dfe | 577 | struct i2c_master_module *const module, |
mbed_official | 15:a81a8d6c1dfe | 578 | uint8_t byte); |
mbed_official | 15:a81a8d6c1dfe | 579 | |
mbed_official | 15:a81a8d6c1dfe | 580 | enum status_code i2c_master_read_packet_wait_no_nack( |
mbed_official | 15:a81a8d6c1dfe | 581 | struct i2c_master_module *const module, |
mbed_official | 15:a81a8d6c1dfe | 582 | struct i2c_master_packet *const packet); |
mbed_official | 15:a81a8d6c1dfe | 583 | |
mbed_official | 15:a81a8d6c1dfe | 584 | /** @} */ |
mbed_official | 15:a81a8d6c1dfe | 585 | |
mbed_official | 15:a81a8d6c1dfe | 586 | #ifdef FEATURE_I2C_DMA_SUPPORT |
mbed_official | 15:a81a8d6c1dfe | 587 | /** |
mbed_official | 15:a81a8d6c1dfe | 588 | * \name SERCOM I2C Master with DMA Interfaces |
mbed_official | 15:a81a8d6c1dfe | 589 | * @{ |
mbed_official | 15:a81a8d6c1dfe | 590 | */ |
mbed_official | 15:a81a8d6c1dfe | 591 | |
mbed_official | 15:a81a8d6c1dfe | 592 | /** |
mbed_official | 15:a81a8d6c1dfe | 593 | * \brief Set I<SUP>2</SUP>C for DMA transfer with slave address and transfer size. |
mbed_official | 15:a81a8d6c1dfe | 594 | * |
mbed_official | 15:a81a8d6c1dfe | 595 | * This function will set the slave address, transfer size and enable the auto transfer |
mbed_official | 15:a81a8d6c1dfe | 596 | * mode for DMA. |
mbed_official | 15:a81a8d6c1dfe | 597 | * |
mbed_official | 15:a81a8d6c1dfe | 598 | * \param[in,out] module Pointer to the driver instance to lock |
mbed_official | 15:a81a8d6c1dfe | 599 | * \param[in] addr I<SUP>2</SUP>C slave address |
mbed_official | 15:a81a8d6c1dfe | 600 | * \param[in] length I<SUP>2</SUP>C transfer length with DMA |
mbed_official | 15:a81a8d6c1dfe | 601 | * \param[in] direction I<SUP>2</SUP>C transfer direction |
mbed_official | 15:a81a8d6c1dfe | 602 | * |
mbed_official | 15:a81a8d6c1dfe | 603 | */ |
mbed_official | 15:a81a8d6c1dfe | 604 | static inline void i2c_master_dma_set_transfer(struct i2c_master_module *const module, |
mbed_official | 15:a81a8d6c1dfe | 605 | uint16_t addr, uint8_t length, enum i2c_transfer_direction direction) |
mbed_official | 15:a81a8d6c1dfe | 606 | { |
mbed_official | 15:a81a8d6c1dfe | 607 | module->hw->I2CM.ADDR.reg = |
mbed_official | 15:a81a8d6c1dfe | 608 | SERCOM_I2CM_ADDR_ADDR(addr<<1) | |
mbed_official | 15:a81a8d6c1dfe | 609 | SERCOM_I2CM_ADDR_LENEN | |
mbed_official | 15:a81a8d6c1dfe | 610 | SERCOM_I2CM_ADDR_LEN(length) | |
mbed_official | 15:a81a8d6c1dfe | 611 | direction; |
mbed_official | 15:a81a8d6c1dfe | 612 | } |
mbed_official | 15:a81a8d6c1dfe | 613 | |
mbed_official | 15:a81a8d6c1dfe | 614 | /** @} */ |
mbed_official | 15:a81a8d6c1dfe | 615 | #endif |
mbed_official | 15:a81a8d6c1dfe | 616 | |
mbed_official | 15:a81a8d6c1dfe | 617 | /** @} */ |
mbed_official | 15:a81a8d6c1dfe | 618 | |
mbed_official | 15:a81a8d6c1dfe | 619 | #ifdef __cplusplus |
mbed_official | 15:a81a8d6c1dfe | 620 | } |
mbed_official | 15:a81a8d6c1dfe | 621 | #endif |
mbed_official | 15:a81a8d6c1dfe | 622 | |
mbed_official | 15:a81a8d6c1dfe | 623 | #endif /* I2C_MASTER_H_INCLUDED */ |