2 * Copyright (c) 2013-2020 ARM Limited. All rights reserved.
4 * SPDX-License-Identifier: Apache-2.0
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
10 * www.apache.org/licenses/LICENSE-2.0
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.
18 * $Date: 24. January 2020
21 * Project: I2C (Inter-Integrated Circuit) Driver definitions
26 * Removed volatile from ARM_I2C_STATUS
28 * ARM_I2C_STATUS made volatile
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
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
43 * New simplified driver:
44 * complexity moved to upper layer (especially data handling)
45 * more unified API for different communication interfaces
48 * Changed prefix ARM_DRV -> ARM_DRIVER
50 * Namespace prefix ARM_ added
63 #include "Driver_Common.h"
65 #define ARM_I2C_API_VERSION ARM_DRIVER_VERSION_MAJOR_MINOR(2,4) /* API version */
68 /****** I2C Control Codes *****/
70 #define ARM_I2C_OWN_ADDRESS (0x01) ///< Set Own Slave Address; arg = address
71 #define ARM_I2C_BUS_SPEED (0x02) ///< Set Bus Speed; arg = speed
72 #define ARM_I2C_BUS_CLEAR (0x03) ///< Execute Bus clear: send nine clock pulses
73 #define ARM_I2C_ABORT_TRANSFER (0x04) ///< Abort Master/Slave Transmit/Receive
75 /*----- I2C Bus Speed -----*/
76 #define ARM_I2C_BUS_SPEED_STANDARD (0x01) ///< Standard Speed (100kHz)
77 #define ARM_I2C_BUS_SPEED_FAST (0x02) ///< Fast Speed (400kHz)
78 #define ARM_I2C_BUS_SPEED_FAST_PLUS (0x03) ///< Fast+ Speed ( 1MHz)
79 #define ARM_I2C_BUS_SPEED_HIGH (0x04) ///< High Speed (3.4MHz)
82 /****** I2C Address Flags *****/
84 #define ARM_I2C_ADDRESS_10BIT (0x0400) ///< 10-bit address flag
85 #define ARM_I2C_ADDRESS_GC (0x8000) ///< General Call flag
91 typedef struct _ARM_I2C_STATUS {
92 uint32_t busy : 1; ///< Busy flag
93 uint32_t mode : 1; ///< Mode: 0=Slave, 1=Master
94 uint32_t direction : 1; ///< Direction: 0=Transmitter, 1=Receiver
95 uint32_t general_call : 1; ///< General Call indication (cleared on start of next Slave operation)
96 uint32_t arbitration_lost : 1; ///< Master lost arbitration (cleared on start of next Master operation)
97 uint32_t bus_error : 1; ///< Bus error detected (cleared on start of next Master/Slave operation)
98 uint32_t reserved : 26;
102 /****** I2C Event *****/
103 #define ARM_I2C_EVENT_TRANSFER_DONE (1UL << 0) ///< Master/Slave Transmit/Receive finished
104 #define ARM_I2C_EVENT_TRANSFER_INCOMPLETE (1UL << 1) ///< Master/Slave Transmit/Receive incomplete transfer
105 #define ARM_I2C_EVENT_SLAVE_TRANSMIT (1UL << 2) ///< Addressed as Slave Transmitter but transmit operation is not set.
106 #define ARM_I2C_EVENT_SLAVE_RECEIVE (1UL << 3) ///< Addressed as Slave Receiver but receive operation is not set.
107 #define ARM_I2C_EVENT_ADDRESS_NACK (1UL << 4) ///< Address not acknowledged from Slave
108 #define ARM_I2C_EVENT_GENERAL_CALL (1UL << 5) ///< Slave addressed with general call address
109 #define ARM_I2C_EVENT_ARBITRATION_LOST (1UL << 6) ///< Master lost arbitration
110 #define ARM_I2C_EVENT_BUS_ERROR (1UL << 7) ///< Bus error detected (START/STOP at illegal position)
111 #define ARM_I2C_EVENT_BUS_CLEAR (1UL << 8) ///< Bus clear finished
114 // Function documentation
116 \fn ARM_DRIVER_VERSION ARM_I2C_GetVersion (void)
117 \brief Get driver version.
118 \return \ref ARM_DRIVER_VERSION
120 \fn ARM_I2C_CAPABILITIES ARM_I2C_GetCapabilities (void)
121 \brief Get driver capabilities.
122 \return \ref ARM_I2C_CAPABILITIES
124 \fn int32_t ARM_I2C_Initialize (ARM_I2C_SignalEvent_t cb_event)
125 \brief Initialize I2C Interface.
126 \param[in] cb_event Pointer to \ref ARM_I2C_SignalEvent
127 \return \ref execution_status
129 \fn int32_t ARM_I2C_Uninitialize (void)
130 \brief De-initialize I2C Interface.
131 \return \ref execution_status
133 \fn int32_t ARM_I2C_PowerControl (ARM_POWER_STATE state)
134 \brief Control I2C Interface Power.
135 \param[in] state Power state
136 \return \ref execution_status
138 \fn int32_t ARM_I2C_MasterTransmit (uint32_t addr, const uint8_t *data, uint32_t num, bool xfer_pending)
139 \brief Start transmitting data as I2C Master.
140 \param[in] addr Slave address (7-bit or 10-bit)
141 \param[in] data Pointer to buffer with data to transmit to I2C Slave
142 \param[in] num Number of data bytes to transmit
143 \param[in] xfer_pending Transfer operation is pending - Stop condition will not be generated
144 \return \ref execution_status
146 \fn int32_t ARM_I2C_MasterReceive (uint32_t addr, uint8_t *data, uint32_t num, bool xfer_pending)
147 \brief Start receiving data as I2C Master.
148 \param[in] addr Slave address (7-bit or 10-bit)
149 \param[out] data Pointer to buffer for data to receive from I2C Slave
150 \param[in] num Number of data bytes to receive
151 \param[in] xfer_pending Transfer operation is pending - Stop condition will not be generated
152 \return \ref execution_status
154 \fn int32_t ARM_I2C_SlaveTransmit (const uint8_t *data, uint32_t num)
155 \brief Start transmitting data as I2C Slave.
156 \param[in] data Pointer to buffer with data to transmit to I2C Master
157 \param[in] num Number of data bytes to transmit
158 \return \ref execution_status
160 \fn int32_t ARM_I2C_SlaveReceive (uint8_t *data, uint32_t num)
161 \brief Start receiving data as I2C Slave.
162 \param[out] data Pointer to buffer for data to receive from I2C Master
163 \param[in] num Number of data bytes to receive
164 \return \ref execution_status
166 \fn int32_t ARM_I2C_GetDataCount (void)
167 \brief Get transferred data count.
168 \return number of data bytes transferred; -1 when Slave is not addressed by Master
170 \fn int32_t ARM_I2C_Control (uint32_t control, uint32_t arg)
171 \brief Control I2C Interface.
172 \param[in] control Operation
173 \param[in] arg Argument of operation (optional)
174 \return \ref execution_status
176 \fn ARM_I2C_STATUS ARM_I2C_GetStatus (void)
177 \brief Get I2C status.
178 \return I2C status \ref ARM_I2C_STATUS
180 \fn void ARM_I2C_SignalEvent (uint32_t event)
181 \brief Signal I2C Events.
182 \param[in] event \ref I2C_events notification mask
185 typedef void (*ARM_I2C_SignalEvent_t) (uint32_t event); ///< Pointer to \ref ARM_I2C_SignalEvent : Signal I2C Event.
189 \brief I2C Driver Capabilities.
191 typedef struct _ARM_I2C_CAPABILITIES {
192 uint32_t address_10_bit : 1; ///< supports 10-bit addressing
193 uint32_t reserved : 31; ///< Reserved (must be zero)
194 } ARM_I2C_CAPABILITIES;
198 \brief Access structure of the I2C Driver.
200 typedef struct _ARM_DRIVER_I2C {
201 ARM_DRIVER_VERSION (*GetVersion) (void); ///< Pointer to \ref ARM_I2C_GetVersion : Get driver version.
202 ARM_I2C_CAPABILITIES (*GetCapabilities)(void); ///< Pointer to \ref ARM_I2C_GetCapabilities : Get driver capabilities.
203 int32_t (*Initialize) (ARM_I2C_SignalEvent_t cb_event); ///< Pointer to \ref ARM_I2C_Initialize : Initialize I2C Interface.
204 int32_t (*Uninitialize) (void); ///< Pointer to \ref ARM_I2C_Uninitialize : De-initialize I2C Interface.
205 int32_t (*PowerControl) (ARM_POWER_STATE state); ///< Pointer to \ref ARM_I2C_PowerControl : Control I2C Interface Power.
206 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.
207 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.
208 int32_t (*SlaveTransmit) ( const uint8_t *data, uint32_t num); ///< Pointer to \ref ARM_I2C_SlaveTransmit : Start transmitting data as I2C Slave.
209 int32_t (*SlaveReceive) ( uint8_t *data, uint32_t num); ///< Pointer to \ref ARM_I2C_SlaveReceive : Start receiving data as I2C Slave.
210 int32_t (*GetDataCount) (void); ///< Pointer to \ref ARM_I2C_GetDataCount : Get transferred data count.
211 int32_t (*Control) (uint32_t control, uint32_t arg); ///< Pointer to \ref ARM_I2C_Control : Control I2C Interface.
212 ARM_I2C_STATUS (*GetStatus) (void); ///< Pointer to \ref ARM_I2C_GetStatus : Get I2C status.
213 } const ARM_DRIVER_I2C;
219 #endif /* DRIVER_I2C_H_ */