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: 31. March 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 #define _ARM_Driver_I2C_(n) Driver_I2C##n
69 #define ARM_Driver_I2C_(n) _ARM_Driver_I2C_(n)
72 /****** I2C Control Codes *****/
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
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)
86 /****** I2C Address Flags *****/
88 #define ARM_I2C_ADDRESS_10BIT (0x0400UL) ///< 10-bit address flag
89 #define ARM_I2C_ADDRESS_GC (0x8000UL) ///< General Call flag
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;
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
118 // Function documentation
120 \fn ARM_DRIVER_VERSION ARM_I2C_GetVersion (void)
121 \brief Get driver version.
122 \return \ref ARM_DRIVER_VERSION
124 \fn ARM_I2C_CAPABILITIES ARM_I2C_GetCapabilities (void)
125 \brief Get driver capabilities.
126 \return \ref ARM_I2C_CAPABILITIES
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
133 \fn int32_t ARM_I2C_Uninitialize (void)
134 \brief De-initialize I2C Interface.
135 \return \ref execution_status
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
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
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
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
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
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
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
180 \fn ARM_I2C_STATUS ARM_I2C_GetStatus (void)
181 \brief Get I2C status.
182 \return I2C status \ref ARM_I2C_STATUS
184 \fn void ARM_I2C_SignalEvent (uint32_t event)
185 \brief Signal I2C Events.
186 \param[in] event \ref I2C_events notification mask
189 typedef void (*ARM_I2C_SignalEvent_t) (uint32_t event); ///< Pointer to \ref ARM_I2C_SignalEvent : Signal I2C Event.
193 \brief I2C Driver Capabilities.
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;
202 \brief Access structure of the I2C Driver.
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;
223 #endif /* DRIVER_I2C_H_ */