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| 1 | +/* |
| 2 | + * Copyright (c) 2013-2020 ARM Limited. All rights reserved. |
| 3 | + * |
| 4 | + * SPDX-License-Identifier: Apache-2.0 |
| 5 | + * |
| 6 | + * Licensed under the Apache License, Version 2.0 (the License); you may |
| 7 | + * not use this file except in compliance with the License. |
| 8 | + * You may obtain a copy of the License at |
| 9 | + * |
| 10 | + * www.apache.org/licenses/LICENSE-2.0 |
| 11 | + * |
| 12 | + * Unless required by applicable law or agreed to in writing, software |
| 13 | + * distributed under the License is distributed on an AS IS BASIS, WITHOUT |
| 14 | + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | + * See the License for the specific language governing permissions and |
| 16 | + * limitations under the License. |
| 17 | + * |
| 18 | + * $Date: 31. March 2020 |
| 19 | + * $Revision: V2.4 |
| 20 | + * |
| 21 | + * Project: I2C (Inter-Integrated Circuit) Driver definitions |
| 22 | + */ |
| 23 | + |
| 24 | +/* History: |
| 25 | + * Version 2.4 |
| 26 | + * Removed volatile from ARM_I2C_STATUS |
| 27 | + * Version 2.3 |
| 28 | + * ARM_I2C_STATUS made volatile |
| 29 | + * Version 2.2 |
| 30 | + * Removed function ARM_I2C_MasterTransfer in order to simplify drivers |
| 31 | + * and added back parameter "xfer_pending" to functions |
| 32 | + * ARM_I2C_MasterTransmit and ARM_I2C_MasterReceive |
| 33 | + * Version 2.1 |
| 34 | + * Added function ARM_I2C_MasterTransfer and removed parameter "xfer_pending" |
| 35 | + * from functions ARM_I2C_MasterTransmit and ARM_I2C_MasterReceive |
| 36 | + * Added function ARM_I2C_GetDataCount |
| 37 | + * Removed flag "address_nack" from ARM_I2C_STATUS |
| 38 | + * Replaced events ARM_I2C_EVENT_MASTER_DONE and ARM_I2C_EVENT_SLAVE_DONE |
| 39 | + * with event ARM_I2C_EVENT_TRANSFER_DONE |
| 40 | + * Added event ARM_I2C_EVENT_TRANSFER_INCOMPLETE |
| 41 | + * Removed parameter "arg" from function ARM_I2C_SignalEvent |
| 42 | + * Version 2.0 |
| 43 | + * New simplified driver: |
| 44 | + * complexity moved to upper layer (especially data handling) |
| 45 | + * more unified API for different communication interfaces |
| 46 | + * Added: |
| 47 | + * Slave Mode |
| 48 | + * Changed prefix ARM_DRV -> ARM_DRIVER |
| 49 | + * Version 1.10 |
| 50 | + * Namespace prefix ARM_ added |
| 51 | + * Version 1.00 |
| 52 | + * Initial release |
| 53 | + */ |
| 54 | + |
| 55 | +#ifndef DRIVER_I2C_H_ |
| 56 | +#define DRIVER_I2C_H_ |
| 57 | + |
| 58 | +#ifdef __cplusplus |
| 59 | +extern "C" |
| 60 | +{ |
| 61 | +#endif |
| 62 | + |
| 63 | +#include "Driver_Common.h" |
| 64 | + |
| 65 | +#define ARM_I2C_API_VERSION ARM_DRIVER_VERSION_MAJOR_MINOR(2,4) /* API version */ |
| 66 | + |
| 67 | + |
| 68 | +#define _ARM_Driver_I2C_(n) Driver_I2C##n |
| 69 | +#define ARM_Driver_I2C_(n) _ARM_Driver_I2C_(n) |
| 70 | + |
| 71 | + |
| 72 | +/****** I2C Control Codes *****/ |
| 73 | + |
| 74 | +#define ARM_I2C_OWN_ADDRESS (0x01UL) ///< Set Own Slave Address; arg = address |
| 75 | +#define ARM_I2C_BUS_SPEED (0x02UL) ///< Set Bus Speed; arg = speed |
| 76 | +#define ARM_I2C_BUS_CLEAR (0x03UL) ///< Execute Bus clear: send nine clock pulses |
| 77 | +#define ARM_I2C_ABORT_TRANSFER (0x04UL) ///< Abort Master/Slave Transmit/Receive |
| 78 | + |
| 79 | +/*----- I2C Bus Speed -----*/ |
| 80 | +#define ARM_I2C_BUS_SPEED_STANDARD (0x01UL) ///< Standard Speed (100kHz) |
| 81 | +#define ARM_I2C_BUS_SPEED_FAST (0x02UL) ///< Fast Speed (400kHz) |
| 82 | +#define ARM_I2C_BUS_SPEED_FAST_PLUS (0x03UL) ///< Fast+ Speed ( 1MHz) |
| 83 | +#define ARM_I2C_BUS_SPEED_HIGH (0x04UL) ///< High Speed (3.4MHz) |
| 84 | + |
| 85 | + |
| 86 | +/****** I2C Address Flags *****/ |
| 87 | + |
| 88 | +#define ARM_I2C_ADDRESS_10BIT (0x0400UL) ///< 10-bit address flag |
| 89 | +#define ARM_I2C_ADDRESS_GC (0x8000UL) ///< General Call flag |
| 90 | + |
| 91 | + |
| 92 | +/** |
| 93 | +\brief I2C Status |
| 94 | +*/ |
| 95 | +typedef struct _ARM_I2C_STATUS { |
| 96 | + uint32_t busy : 1; ///< Busy flag |
| 97 | + uint32_t mode : 1; ///< Mode: 0=Slave, 1=Master |
| 98 | + uint32_t direction : 1; ///< Direction: 0=Transmitter, 1=Receiver |
| 99 | + uint32_t general_call : 1; ///< General Call indication (cleared on start of next Slave operation) |
| 100 | + uint32_t arbitration_lost : 1; ///< Master lost arbitration (cleared on start of next Master operation) |
| 101 | + uint32_t bus_error : 1; ///< Bus error detected (cleared on start of next Master/Slave operation) |
| 102 | + uint32_t reserved : 26; |
| 103 | +} ARM_I2C_STATUS; |
| 104 | + |
| 105 | + |
| 106 | +/****** I2C Event *****/ |
| 107 | +#define ARM_I2C_EVENT_TRANSFER_DONE (1UL << 0) ///< Master/Slave Transmit/Receive finished |
| 108 | +#define ARM_I2C_EVENT_TRANSFER_INCOMPLETE (1UL << 1) ///< Master/Slave Transmit/Receive incomplete transfer |
| 109 | +#define ARM_I2C_EVENT_SLAVE_TRANSMIT (1UL << 2) ///< Addressed as Slave Transmitter but transmit operation is not set. |
| 110 | +#define ARM_I2C_EVENT_SLAVE_RECEIVE (1UL << 3) ///< Addressed as Slave Receiver but receive operation is not set. |
| 111 | +#define ARM_I2C_EVENT_ADDRESS_NACK (1UL << 4) ///< Address not acknowledged from Slave |
| 112 | +#define ARM_I2C_EVENT_GENERAL_CALL (1UL << 5) ///< Slave addressed with general call address |
| 113 | +#define ARM_I2C_EVENT_ARBITRATION_LOST (1UL << 6) ///< Master lost arbitration |
| 114 | +#define ARM_I2C_EVENT_BUS_ERROR (1UL << 7) ///< Bus error detected (START/STOP at illegal position) |
| 115 | +#define ARM_I2C_EVENT_BUS_CLEAR (1UL << 8) ///< Bus clear finished |
| 116 | + |
| 117 | + |
| 118 | +// Function documentation |
| 119 | +/** |
| 120 | + \fn ARM_DRIVER_VERSION ARM_I2C_GetVersion (void) |
| 121 | + \brief Get driver version. |
| 122 | + \return \ref ARM_DRIVER_VERSION |
| 123 | +
|
| 124 | + \fn ARM_I2C_CAPABILITIES ARM_I2C_GetCapabilities (void) |
| 125 | + \brief Get driver capabilities. |
| 126 | + \return \ref ARM_I2C_CAPABILITIES |
| 127 | +
|
| 128 | + \fn int32_t ARM_I2C_Initialize (ARM_I2C_SignalEvent_t cb_event) |
| 129 | + \brief Initialize I2C Interface. |
| 130 | + \param[in] cb_event Pointer to \ref ARM_I2C_SignalEvent |
| 131 | + \return \ref execution_status |
| 132 | +
|
| 133 | + \fn int32_t ARM_I2C_Uninitialize (void) |
| 134 | + \brief De-initialize I2C Interface. |
| 135 | + \return \ref execution_status |
| 136 | +
|
| 137 | + \fn int32_t ARM_I2C_PowerControl (ARM_POWER_STATE state) |
| 138 | + \brief Control I2C Interface Power. |
| 139 | + \param[in] state Power state |
| 140 | + \return \ref execution_status |
| 141 | +
|
| 142 | + \fn int32_t ARM_I2C_MasterTransmit (uint32_t addr, const uint8_t *data, uint32_t num, bool xfer_pending) |
| 143 | + \brief Start transmitting data as I2C Master. |
| 144 | + \param[in] addr Slave address (7-bit or 10-bit) |
| 145 | + \param[in] data Pointer to buffer with data to transmit to I2C Slave |
| 146 | + \param[in] num Number of data bytes to transmit |
| 147 | + \param[in] xfer_pending Transfer operation is pending - Stop condition will not be generated |
| 148 | + \return \ref execution_status |
| 149 | +
|
| 150 | + \fn int32_t ARM_I2C_MasterReceive (uint32_t addr, uint8_t *data, uint32_t num, bool xfer_pending) |
| 151 | + \brief Start receiving data as I2C Master. |
| 152 | + \param[in] addr Slave address (7-bit or 10-bit) |
| 153 | + \param[out] data Pointer to buffer for data to receive from I2C Slave |
| 154 | + \param[in] num Number of data bytes to receive |
| 155 | + \param[in] xfer_pending Transfer operation is pending - Stop condition will not be generated |
| 156 | + \return \ref execution_status |
| 157 | +
|
| 158 | + \fn int32_t ARM_I2C_SlaveTransmit (const uint8_t *data, uint32_t num) |
| 159 | + \brief Start transmitting data as I2C Slave. |
| 160 | + \param[in] data Pointer to buffer with data to transmit to I2C Master |
| 161 | + \param[in] num Number of data bytes to transmit |
| 162 | + \return \ref execution_status |
| 163 | +
|
| 164 | + \fn int32_t ARM_I2C_SlaveReceive (uint8_t *data, uint32_t num) |
| 165 | + \brief Start receiving data as I2C Slave. |
| 166 | + \param[out] data Pointer to buffer for data to receive from I2C Master |
| 167 | + \param[in] num Number of data bytes to receive |
| 168 | + \return \ref execution_status |
| 169 | +
|
| 170 | + \fn int32_t ARM_I2C_GetDataCount (void) |
| 171 | + \brief Get transferred data count. |
| 172 | + \return number of data bytes transferred; -1 when Slave is not addressed by Master |
| 173 | +
|
| 174 | + \fn int32_t ARM_I2C_Control (uint32_t control, uint32_t arg) |
| 175 | + \brief Control I2C Interface. |
| 176 | + \param[in] control Operation |
| 177 | + \param[in] arg Argument of operation (optional) |
| 178 | + \return \ref execution_status |
| 179 | +
|
| 180 | + \fn ARM_I2C_STATUS ARM_I2C_GetStatus (void) |
| 181 | + \brief Get I2C status. |
| 182 | + \return I2C status \ref ARM_I2C_STATUS |
| 183 | +
|
| 184 | + \fn void ARM_I2C_SignalEvent (uint32_t event) |
| 185 | + \brief Signal I2C Events. |
| 186 | + \param[in] event \ref I2C_events notification mask |
| 187 | +*/ |
| 188 | + |
| 189 | +typedef void (*ARM_I2C_SignalEvent_t) (uint32_t event); ///< Pointer to \ref ARM_I2C_SignalEvent : Signal I2C Event. |
| 190 | + |
| 191 | + |
| 192 | +/** |
| 193 | +\brief I2C Driver Capabilities. |
| 194 | +*/ |
| 195 | +typedef struct _ARM_I2C_CAPABILITIES { |
| 196 | + uint32_t address_10_bit : 1; ///< supports 10-bit addressing |
| 197 | + uint32_t reserved : 31; ///< Reserved (must be zero) |
| 198 | +} ARM_I2C_CAPABILITIES; |
| 199 | + |
| 200 | + |
| 201 | +/** |
| 202 | +\brief Access structure of the I2C Driver. |
| 203 | +*/ |
| 204 | +typedef struct _ARM_DRIVER_I2C { |
| 205 | + ARM_DRIVER_VERSION (*GetVersion) (void); ///< Pointer to \ref ARM_I2C_GetVersion : Get driver version. |
| 206 | + ARM_I2C_CAPABILITIES (*GetCapabilities)(void); ///< Pointer to \ref ARM_I2C_GetCapabilities : Get driver capabilities. |
| 207 | + int32_t (*Initialize) (ARM_I2C_SignalEvent_t cb_event); ///< Pointer to \ref ARM_I2C_Initialize : Initialize I2C Interface. |
| 208 | + int32_t (*Uninitialize) (void); ///< Pointer to \ref ARM_I2C_Uninitialize : De-initialize I2C Interface. |
| 209 | + int32_t (*PowerControl) (ARM_POWER_STATE state); ///< Pointer to \ref ARM_I2C_PowerControl : Control I2C Interface Power. |
| 210 | + int32_t (*MasterTransmit) (uint32_t addr, const uint8_t *data, uint32_t num, bool xfer_pending); ///< Pointer to \ref ARM_I2C_MasterTransmit : Start transmitting data as I2C Master. |
| 211 | + int32_t (*MasterReceive) (uint32_t addr, uint8_t *data, uint32_t num, bool xfer_pending); ///< Pointer to \ref ARM_I2C_MasterReceive : Start receiving data as I2C Master. |
| 212 | + int32_t (*SlaveTransmit) ( const uint8_t *data, uint32_t num); ///< Pointer to \ref ARM_I2C_SlaveTransmit : Start transmitting data as I2C Slave. |
| 213 | + int32_t (*SlaveReceive) ( uint8_t *data, uint32_t num); ///< Pointer to \ref ARM_I2C_SlaveReceive : Start receiving data as I2C Slave. |
| 214 | + int32_t (*GetDataCount) (void); ///< Pointer to \ref ARM_I2C_GetDataCount : Get transferred data count. |
| 215 | + int32_t (*Control) (uint32_t control, uint32_t arg); ///< Pointer to \ref ARM_I2C_Control : Control I2C Interface. |
| 216 | + ARM_I2C_STATUS (*GetStatus) (void); ///< Pointer to \ref ARM_I2C_GetStatus : Get I2C status. |
| 217 | +} const ARM_DRIVER_I2C; |
| 218 | + |
| 219 | +#ifdef __cplusplus |
| 220 | +} |
| 221 | +#endif |
| 222 | + |
| 223 | +#endif /* DRIVER_I2C_H_ */ |
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