Diff: mbed-dev/targets/TARGET_ONSEMI/TARGET_NCS36510/i2c.h

Revision:

18:6a4db94011d3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-dev/targets/TARGET_ONSEMI/TARGET_NCS36510/i2c.h	Sun May 14 23:18:57 2017 +0000
@@ -0,0 +1,161 @@
+/**
+ ******************************************************************************
+ * @file    i2c.h
+ * @brief    (API) Public header of i2c driver
+ * @internal
+ * @author   ON Semiconductor
+ * $Rev:  $
+ * $Date: 2016-04-20 $
+ ******************************************************************************
+ * Copyright 2016 Semiconductor Components Industries LLC (d/b/a “ON Semiconductor”).
+ * All rights reserved.  This software and/or documentation is licensed by ON Semiconductor
+ * under limited terms and conditions.  The terms and conditions pertaining to the software
+ * and/or documentation are available at http://www.onsemi.com/site/pdf/ONSEMI_T&C.pdf
+ * (“ON Semiconductor Standard Terms and Conditions of Sale, Section 8 Software”) and
+ * if applicable the software license agreement.  Do not use this software and/or
+ * documentation unless you have carefully read and you agree to the limited terms and
+ * conditions.  By using this software and/or documentation, you agree to the limited
+ * terms and conditions.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED
+ * OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
+ * ON SEMICONDUCTOR SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL,
+ * INCIDENTAL, OR CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
+ * @endinternal
+ *
+ * @ingroup i2c
+ */
+
+#include "mbed_assert.h"
+#include "i2c_api.h"
+#include "clock.h"
+#include "i2c_ipc7208_map.h"
+#include "memory_map.h"
+#include "PeripheralPins.h"
+
+#ifndef I2C_H_
+#define    I2C_H_
+
+/* Miscellaneous I/O and control operations codes */
+#define I2C_IPC7208_IOCTL_NOT_ACK        0x03
+#define I2C_IPC7208_IOCTL_NULL_CMD       0x04
+#define I2C_IPC7208_IOCTL_ACK            0x05
+
+/* Definitions for the clock speed. */
+#define I2C_SPEED_100K_AT_8MHZ     (uint8_t)0x12
+#define I2C_SPEED_100K_AT_16MHZ    (uint8_t)0x26
+#define I2C_SPEED_400K_AT_8MHZ     (uint8_t)0x03
+#define I2C_SPEED_400K_AT_16MHZ    (uint8_t)0x08
+
+
+/* I2C commands */
+#define I2C_CMD_NULL          0x00
+#define I2C_CMD_WDAT0         0x10
+#define I2C_CMD_WDAT1         0x11
+#define I2C_CMD_WDAT8         0x12
+#define I2C_CMD_RDAT8         0x13
+#define I2C_CMD_STOP          0x14
+#define I2C_CMD_START         0x15
+#define I2C_CMD_VRFY_ACK      0x16
+#define I2C_CMD_VRFY_VACK     0x17
+
+/* Status register bits */
+#define I2C_STATUS_CMD_FIFO_MPTY_BIT     0x01
+#define I2C_STATUS_RD_DATA_RDY_BIT       0x02
+#define I2C_STATUS_BUS_ERR_BIT           0x04
+#define I2C_STATUS_RD_DATA_UFL_BIT       0x08
+#define I2C_STATUS_CMD_FIFO_OFL_BIT      0x10
+#define I2C_STATUS_CMD_FIFO_FULL_BIT     0x20
+
+/* I2C return status */
+#define I2C_STATUS_INVALID            0xFF
+#define I2C_STATUS_SUCCESS            0x00
+#define I2C_STATUS_FAIL               0x01
+#define I2C_STATUS_BUS_ERROR          0x02
+#define I2C_STATUS_RD_DATA_UFL        0x03
+#define I2C_STATUS_CMD_FIFO_OFL       0x04
+#define I2C_STATUS_INTERRUPT_ERROR    0x05
+#define I2C_STATUS_CMD_FIFO_EMPTY     0x06
+
+/* I2C clock divider position */
+#define I2C_CLOCKDIVEDER_VAL_MASK       0x1F
+#define I2C_APB_CLK_DIVIDER_VAL_MASK    0x1FE0
+
+/* Error check */
+#define I2C_UFL_CHECK         (obj->membase->STATUS.WORD & 0x80)
+#define I2C_FIFO_FULL         (obj->membase->STATUS.WORD & 0x20)
+#define FIFO_OFL_CHECK        (obj->membase->STATUS.WORD & 0x10)
+#define I2C_BUS_ERR_CHECK     (obj->membase->STATUS.WORD & 0x04)
+#define RD_DATA_READY         (obj->membase->STATUS.WORD & 0x02)
+#define I2C_FIFO_EMPTY        (obj->membase->STATUS.WORD & 0x01)
+
+#define I2C_API_STATUS_SUCCESS    0
+#define PAD_REG_ADRS_BYTE_SIZE    4
+
+#define SEND_COMMAND(cmd)  while(!I2C_FIFO_EMPTY); wait_us(1); obj->membase->CMD_REG = cmd;
+
+/** Init I2C device.
+ * @details
+ * Sets the necessary registers. The baud rate is set default to 100K
+ *
+ * @param obj A I2C device instance.
+ * @param sda GPIO number for SDA line
+ * @param scl GPIO number for SCL line
+ * @return None
+ */
+extern void fI2cInit(i2c_t *obj,PinName sda,PinName scl);
+
+/** Set baud rate or frequency
+ * @details
+ * Sets user baudrate
+ *
+ * @param obj A I2C device instance.
+ * @param hz User desired baud rate/frequency
+ * @return None
+ */
+extern void fI2cFrequency(i2c_t *obj, uint32_t hz);
+
+/** Sends start bit
+ * @details
+ * Sends start bit on i2c pins
+ *
+ * @param obj A I2C device instance.
+ * @return status
+ */
+extern int32_t fI2cStart(i2c_t *obj);
+
+/** Sends stop bit
+ * @details
+ * Sends stop bit on i2c pins
+ *
+ * @param obj A I2C device instance.
+ * @return status
+ */
+extern int32_t fI2cStop(i2c_t *obj);
+
+/** Reads data from a I2C device in blocking fashion.
+ * @details
+ * The data is read from the receive queue into the buffer. The receive queue is
+ * filled by the interrupt handler.  If not enough data is available,
+ *
+ * @param d The device to read from.
+ * @param buf The buffer to read into (only the contents of the buffer may be modified, not the buffer itself).
+ * @param len The maximum number of bytes to read, typically the buffer length.
+ * @return On Success: The actual number of bytes read. On Failure: Failure code.
+ */
+extern int32_t fI2cReadB(i2c_t *d, char *buf, int len);
+
+/** Write data to an I2C device.
+ * @details
+ * The commands(I2C instructions) and data arrive at the I2C Engine via the Command FIFO.
+ * The command to write the data & data to be written is sent to command FIFO by writing it into command register.
+ *
+ * @param d The device to write to.
+ * @param buf The buffer to write from (the contents of the buffer may not be modified).
+ * @param len The number of bytes to write.
+ * @return On success: The actual number of bytes written. On Failure: Failure code
+ */
+extern int32_t fI2cWriteB(i2c_t *d, const char *buf, int len);
+
+#endif /* I2C_H_ */
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