Daniel Sygut / Application

lol

Dependencies:   MMA8451Q

Fork of Application by Mateusz Kowalik

mbed-dev/targets/TARGET_ONSEMI/TARGET_NCS36510/i2c.h@12:3a30cdffa27c, 2018-01-21 (annotated)

Committer:
danix
Date:
Sun Jan 21 22:28:30 2018 +0000
Revision:
12:3a30cdffa27c
Parent:
10:41552d038a69 
Working acelerometer and mouse

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Zaitsev 10:41552d038a69 1 /**
Zaitsev 10:41552d038a69 2 ******************************************************************************
Zaitsev 10:41552d038a69 3 * @file i2c.h
Zaitsev 10:41552d038a69 4 * @brief (API) Public header of i2c driver
Zaitsev 10:41552d038a69 5 * @internal
Zaitsev 10:41552d038a69 6 * @author ON Semiconductor
Zaitsev 10:41552d038a69 7 * $Rev: $
Zaitsev 10:41552d038a69 8 * $Date: 2016-04-20 $
Zaitsev 10:41552d038a69 9 ******************************************************************************
Zaitsev 10:41552d038a69 10 * Copyright 2016 Semiconductor Components Industries LLC (d/b/a “ON Semiconductor”).
Zaitsev 10:41552d038a69 11 * All rights reserved. This software and/or documentation is licensed by ON Semiconductor
Zaitsev 10:41552d038a69 12 * under limited terms and conditions. The terms and conditions pertaining to the software
Zaitsev 10:41552d038a69 13 * and/or documentation are available at http://www.onsemi.com/site/pdf/ONSEMI_T&C.pdf
Zaitsev 10:41552d038a69 14 * (“ON Semiconductor Standard Terms and Conditions of Sale, Section 8 Software”) and
Zaitsev 10:41552d038a69 15 * if applicable the software license agreement. Do not use this software and/or
Zaitsev 10:41552d038a69 16 * documentation unless you have carefully read and you agree to the limited terms and
Zaitsev 10:41552d038a69 17 * conditions. By using this software and/or documentation, you agree to the limited
Zaitsev 10:41552d038a69 18 * terms and conditions.
Zaitsev 10:41552d038a69 19 *
Zaitsev 10:41552d038a69 20 * THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED
Zaitsev 10:41552d038a69 21 * OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
Zaitsev 10:41552d038a69 22 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
Zaitsev 10:41552d038a69 23 * ON SEMICONDUCTOR SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL,
Zaitsev 10:41552d038a69 24 * INCIDENTAL, OR CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
Zaitsev 10:41552d038a69 25 * @endinternal
Zaitsev 10:41552d038a69 26 *
Zaitsev 10:41552d038a69 27 * @ingroup i2c
Zaitsev 10:41552d038a69 28 */
Zaitsev 10:41552d038a69 29
Zaitsev 10:41552d038a69 30 #include "mbed_assert.h"
Zaitsev 10:41552d038a69 31 #include "i2c_api.h"
Zaitsev 10:41552d038a69 32 #include "clock.h"
Zaitsev 10:41552d038a69 33 #include "i2c_ipc7208_map.h"
Zaitsev 10:41552d038a69 34 #include "memory_map.h"
Zaitsev 10:41552d038a69 35 #include "PeripheralPins.h"
Zaitsev 10:41552d038a69 36
Zaitsev 10:41552d038a69 37 #ifndef I2C_H_
Zaitsev 10:41552d038a69 38 #define I2C_H_
Zaitsev 10:41552d038a69 39
Zaitsev 10:41552d038a69 40 /* Miscellaneous I/O and control operations codes */
Zaitsev 10:41552d038a69 41 #define I2C_IPC7208_IOCTL_NOT_ACK 0x03
Zaitsev 10:41552d038a69 42 #define I2C_IPC7208_IOCTL_NULL_CMD 0x04
Zaitsev 10:41552d038a69 43 #define I2C_IPC7208_IOCTL_ACK 0x05
Zaitsev 10:41552d038a69 44
Zaitsev 10:41552d038a69 45 /* Definitions for the clock speed. */
Zaitsev 10:41552d038a69 46 #define I2C_SPEED_100K_AT_8MHZ (uint8_t)0x12
Zaitsev 10:41552d038a69 47 #define I2C_SPEED_100K_AT_16MHZ (uint8_t)0x26
Zaitsev 10:41552d038a69 48 #define I2C_SPEED_400K_AT_8MHZ (uint8_t)0x03
Zaitsev 10:41552d038a69 49 #define I2C_SPEED_400K_AT_16MHZ (uint8_t)0x08
Zaitsev 10:41552d038a69 50
Zaitsev 10:41552d038a69 51
Zaitsev 10:41552d038a69 52 /* I2C commands */
Zaitsev 10:41552d038a69 53 #define I2C_CMD_NULL 0x00
Zaitsev 10:41552d038a69 54 #define I2C_CMD_WDAT0 0x10
Zaitsev 10:41552d038a69 55 #define I2C_CMD_WDAT1 0x11
Zaitsev 10:41552d038a69 56 #define I2C_CMD_WDAT8 0x12
Zaitsev 10:41552d038a69 57 #define I2C_CMD_RDAT8 0x13
Zaitsev 10:41552d038a69 58 #define I2C_CMD_STOP 0x14
Zaitsev 10:41552d038a69 59 #define I2C_CMD_START 0x15
Zaitsev 10:41552d038a69 60 #define I2C_CMD_VRFY_ACK 0x16
Zaitsev 10:41552d038a69 61 #define I2C_CMD_VRFY_VACK 0x17
Zaitsev 10:41552d038a69 62
Zaitsev 10:41552d038a69 63 /* Status register bits */
Zaitsev 10:41552d038a69 64 #define I2C_STATUS_CMD_FIFO_MPTY_BIT 0x01
Zaitsev 10:41552d038a69 65 #define I2C_STATUS_RD_DATA_RDY_BIT 0x02
Zaitsev 10:41552d038a69 66 #define I2C_STATUS_BUS_ERR_BIT 0x04
Zaitsev 10:41552d038a69 67 #define I2C_STATUS_RD_DATA_UFL_BIT 0x08
Zaitsev 10:41552d038a69 68 #define I2C_STATUS_CMD_FIFO_OFL_BIT 0x10
Zaitsev 10:41552d038a69 69 #define I2C_STATUS_CMD_FIFO_FULL_BIT 0x20
Zaitsev 10:41552d038a69 70
Zaitsev 10:41552d038a69 71 /* I2C return status */
Zaitsev 10:41552d038a69 72 #define I2C_STATUS_INVALID 0xFF
Zaitsev 10:41552d038a69 73 #define I2C_STATUS_SUCCESS 0x00
Zaitsev 10:41552d038a69 74 #define I2C_STATUS_FAIL 0x01
Zaitsev 10:41552d038a69 75 #define I2C_STATUS_BUS_ERROR 0x02
Zaitsev 10:41552d038a69 76 #define I2C_STATUS_RD_DATA_UFL 0x03
Zaitsev 10:41552d038a69 77 #define I2C_STATUS_CMD_FIFO_OFL 0x04
Zaitsev 10:41552d038a69 78 #define I2C_STATUS_INTERRUPT_ERROR 0x05
Zaitsev 10:41552d038a69 79 #define I2C_STATUS_CMD_FIFO_EMPTY 0x06
Zaitsev 10:41552d038a69 80
Zaitsev 10:41552d038a69 81 /* I2C clock divider position */
Zaitsev 10:41552d038a69 82 #define I2C_CLOCKDIVEDER_VAL_MASK 0x1F
Zaitsev 10:41552d038a69 83 #define I2C_APB_CLK_DIVIDER_VAL_MASK 0x1FE0
Zaitsev 10:41552d038a69 84
Zaitsev 10:41552d038a69 85 /* Error check */
Zaitsev 10:41552d038a69 86 #define I2C_UFL_CHECK (d->membase->STATUS.WORD & 0x80)
Zaitsev 10:41552d038a69 87 #define FIFO_OFL_CHECK (d->membase->STATUS.WORD & 0x10)
Zaitsev 10:41552d038a69 88 #define I2C_BUS_ERR_CHECK (d->membase->STATUS.WORD & 0x04)
Zaitsev 10:41552d038a69 89 #define RD_DATA_READY (d->membase->STATUS.WORD & 0x02)
Zaitsev 10:41552d038a69 90
Zaitsev 10:41552d038a69 91 #define I2C_API_STATUS_SUCCESS 0
Zaitsev 10:41552d038a69 92 #define PAD_REG_ADRS_BYTE_SIZE 4
Zaitsev 10:41552d038a69 93
Zaitsev 10:41552d038a69 94 /** Init I2C device.
Zaitsev 10:41552d038a69 95 * @details
Zaitsev 10:41552d038a69 96 * Sets the necessary registers. The baud rate is set default to 100K
Zaitsev 10:41552d038a69 97 *
Zaitsev 10:41552d038a69 98 * @param obj A I2C device instance.
Zaitsev 10:41552d038a69 99 * @param sda GPIO number for SDA line
Zaitsev 10:41552d038a69 100 * @param scl GPIO number for SCL line
Zaitsev 10:41552d038a69 101 * @return None
Zaitsev 10:41552d038a69 102 */
Zaitsev 10:41552d038a69 103 extern void fI2cInit(i2c_t *obj,PinName sda,PinName scl);
Zaitsev 10:41552d038a69 104
Zaitsev 10:41552d038a69 105 /** Set baud rate or frequency
Zaitsev 10:41552d038a69 106 * @details
Zaitsev 10:41552d038a69 107 * Sets user baudrate
Zaitsev 10:41552d038a69 108 *
Zaitsev 10:41552d038a69 109 * @param obj A I2C device instance.
Zaitsev 10:41552d038a69 110 * @param hz User desired baud rate/frequency
Zaitsev 10:41552d038a69 111 * @return None
Zaitsev 10:41552d038a69 112 */
Zaitsev 10:41552d038a69 113 extern void fI2cFrequency(i2c_t *obj, uint32_t hz);
Zaitsev 10:41552d038a69 114
Zaitsev 10:41552d038a69 115 /** Sends start bit
Zaitsev 10:41552d038a69 116 * @details
Zaitsev 10:41552d038a69 117 * Sends start bit on i2c pins
Zaitsev 10:41552d038a69 118 *
Zaitsev 10:41552d038a69 119 * @param obj A I2C device instance.
Zaitsev 10:41552d038a69 120 * @return status
Zaitsev 10:41552d038a69 121 */
Zaitsev 10:41552d038a69 122 extern int32_t fI2cStart(i2c_t *obj);
Zaitsev 10:41552d038a69 123
Zaitsev 10:41552d038a69 124 /** Sends stop bit
Zaitsev 10:41552d038a69 125 * @details
Zaitsev 10:41552d038a69 126 * Sends stop bit on i2c pins
Zaitsev 10:41552d038a69 127 *
Zaitsev 10:41552d038a69 128 * @param obj A I2C device instance.
Zaitsev 10:41552d038a69 129 * @return status
Zaitsev 10:41552d038a69 130 */
Zaitsev 10:41552d038a69 131 extern int32_t fI2cStop(i2c_t *obj);
Zaitsev 10:41552d038a69 132
Zaitsev 10:41552d038a69 133 /** Reads data from a I2C device in blocking fashion.
Zaitsev 10:41552d038a69 134 * @details
Zaitsev 10:41552d038a69 135 * The data is read from the receive queue into the buffer. The receive queue is
Zaitsev 10:41552d038a69 136 * filled by the interrupt handler. If not enough data is available,
Zaitsev 10:41552d038a69 137 *
Zaitsev 10:41552d038a69 138 * @param d The device to read from.
Zaitsev 10:41552d038a69 139 * @param buf The buffer to read into (only the contents of the buffer may be modified, not the buffer itself).
Zaitsev 10:41552d038a69 140 * @param len The maximum number of bytes to read, typically the buffer length.
Zaitsev 10:41552d038a69 141 * @return On Success: The actual number of bytes read. On Failure: Failure code.
Zaitsev 10:41552d038a69 142 */
Zaitsev 10:41552d038a69 143 extern int32_t fI2cReadB(i2c_t *d, char *buf, int len);
Zaitsev 10:41552d038a69 144
Zaitsev 10:41552d038a69 145 /** Write data to an I2C device.
Zaitsev 10:41552d038a69 146 * @details
Zaitsev 10:41552d038a69 147 * The commands(I2C instructions) and data arrive at the I2C Engine via the Command FIFO.
Zaitsev 10:41552d038a69 148 * The command to write the data & data to be written is sent to command FIFO by writing it into command register.
Zaitsev 10:41552d038a69 149 *
Zaitsev 10:41552d038a69 150 * @param d The device to write to.
Zaitsev 10:41552d038a69 151 * @param buf The buffer to write from (the contents of the buffer may not be modified).
Zaitsev 10:41552d038a69 152 * @param len The number of bytes to write.
Zaitsev 10:41552d038a69 153 * @return On success: The actual number of bytes written. On Failure: Failure code
Zaitsev 10:41552d038a69 154 */
Zaitsev 10:41552d038a69 155 extern int32_t fI2cWriteB(i2c_t *d, const char *buf, int len);
Zaitsev 10:41552d038a69 156
Zaitsev 10:41552d038a69 157 #endif /* I2C_H_ */