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/**
 * @file VL53L0X_i2c.c
 *
 * Copyright (C) 2014 ST MicroElectronics
 *
 * provide variable word size byte/Word/dword VL6180x register access via i2c
 *
 */

#include "vl53l0x_platform.h"
#include "vl53l0x_i2c_platform.h"
#include "vl53l0x_api.h"

#define LOG_FUNCTION_START(fmt, ... )           _LOG_FUNCTION_START(TRACE_MODULE_PLATFORM, fmt, ##__VA_ARGS__)
#define LOG_FUNCTION_END(status, ... )          _LOG_FUNCTION_END(TRACE_MODULE_PLATFORM, status, ##__VA_ARGS__)
#define LOG_FUNCTION_END_FMT(status, fmt, ... ) _LOG_FUNCTION_END_FMT(TRACE_MODULE_PLATFORM, status, fmt, ##__VA_ARGS__)

/**
 * @def I2C_BUFFER_CONFIG
 *
 * @brief Configure Device register I2C access
 *
 * @li 0 : one GLOBAL buffer \n
 *   Use one global buffer of MAX_I2C_XFER_SIZE byte in data space \n
 *   This solution is not multi-Device compliant nor multi-thread cpu safe \n
 *   It can be the best option for small 8/16 bit MCU without stack and limited ram  (STM8s, 80C51 ...)
 *
 * @li 1 : ON_STACK/local \n
 *   Use local variable (on stack) buffer \n
 *   This solution is multi-thread with use of i2c resource lock or mutex see VL6180x_GetI2CAccess() \n
 *
 * @li 2 : User defined \n
 *    Per Device potentially dynamic allocated. Requires VL6180x_GetI2cBuffer() to be implemented.
 * @ingroup Configuration
 */
#define I2C_BUFFER_CONFIG 1
/** Maximum buffer size to be used in i2c */
#define VL53L0X_MAX_I2C_XFER_SIZE   64 /* Maximum buffer size to be used in i2c */

#if I2C_BUFFER_CONFIG == 0
    /* GLOBAL config buffer */
    uint8_t i2c_global_buffer[VL53L0X_MAX_I2C_XFER_SIZE];

    #define DECL_I2C_BUFFER
    #define VL53L0X_GetLocalBuffer(Dev, n_byte)  i2c_global_buffer

#elif I2C_BUFFER_CONFIG == 1
    /* ON STACK */
    #define DECL_I2C_BUFFER  uint8_t LocBuffer[VL53L0X_MAX_I2C_XFER_SIZE];
    #define VL53L0X_GetLocalBuffer(Dev, n_byte)  LocBuffer
#elif I2C_BUFFER_CONFIG == 2
    /* user define buffer type declare DECL_I2C_BUFFER  as access  via VL53L0X_GetLocalBuffer */
    #define DECL_I2C_BUFFER
#else
#error "invalid I2C_BUFFER_CONFIG "
#endif


#define VL53L0X_I2C_USER_VAR         /* none but could be for a flag var to get/pass to mutex interruptible  return flags and try again */
#define VL53L0X_GetI2CAccess(Dev)    /* todo mutex acquire */
#define VL53L0X_DoneI2CAcces(Dev)    /* todo mutex release */

VL53L0X_Error VL53L0X_LockSequenceAccess(VL53L0X_DEV Dev){
    VL53L0X_Error Status = VL53L0X_ERROR_NONE;

    return Status;
}

VL53L0X_Error VL53L0X_UnlockSequenceAccess(VL53L0X_DEV Dev){
    VL53L0X_Error Status = VL53L0X_ERROR_NONE;

    return Status;
}

// the ranging_sensor_comms.dll will take care of the page selection
VL53L0X_Error VL53L0X_WriteMulti(VL53L0X_DEV Dev, uint8_t index, uint8_t *pdata, uint32_t count){

    VL53L0X_Error Status = VL53L0X_ERROR_NONE;
    int32_t status_int = 0;
	uint8_t deviceAddress;

    if (count>=VL53L0X_MAX_I2C_XFER_SIZE){
        Status = VL53L0X_ERROR_INVALID_PARAMS;
    }

	deviceAddress = Dev->I2cDevAddr;

	status_int = VL53L0X_write_multi(deviceAddress, index, pdata, count);

	if (status_int != 0)
		Status = VL53L0X_ERROR_CONTROL_INTERFACE;

    return Status;
}

// the ranging_sensor_comms.dll will take care of the page selection
VL53L0X_Error VL53L0X_ReadMulti(VL53L0X_DEV Dev, uint8_t index, uint8_t *pdata, uint32_t count){
    VL53L0X_I2C_USER_VAR
    VL53L0X_Error Status = VL53L0X_ERROR_NONE;
    int32_t status_int;
	uint8_t deviceAddress;

    if (count>=VL53L0X_MAX_I2C_XFER_SIZE){
        Status = VL53L0X_ERROR_INVALID_PARAMS;
    }

    deviceAddress = Dev->I2cDevAddr;

	status_int = VL53L0X_read_multi(deviceAddress, index, pdata, count);

	if (status_int != 0)
		Status = VL53L0X_ERROR_CONTROL_INTERFACE;

    return Status;
}


VL53L0X_Error VL53L0X_WrByte(VL53L0X_DEV Dev, uint8_t index, uint8_t data){
  VL53L0X_Error Status = VL53L0X_ERROR_NONE;
  int32_t status_int;
	uint8_t deviceAddress;
	
	deviceAddress = Dev->I2cDevAddr;
	
	status_int = VL53L0X_write_byte(deviceAddress, index, data);

	if (status_int != 0)
		Status = VL53L0X_ERROR_CONTROL_INTERFACE;

    return Status;
}

VL53L0X_Error VL53L0X_WrWord(VL53L0X_DEV Dev, uint8_t index, uint16_t data){
    VL53L0X_Error Status = VL53L0X_ERROR_NONE;
    int32_t status_int;
	uint8_t deviceAddress;

    deviceAddress = Dev->I2cDevAddr;

	status_int = VL53L0X_write_word(deviceAddress, index, data);

	if (status_int != 0)
		Status = VL53L0X_ERROR_CONTROL_INTERFACE;

    return Status;
}

VL53L0X_Error VL53L0X_WrDWord(VL53L0X_DEV Dev, uint8_t index, uint32_t data){
    VL53L0X_Error Status = VL53L0X_ERROR_NONE;
    int32_t status_int;
	uint8_t deviceAddress;

    deviceAddress = Dev->I2cDevAddr;

	status_int = VL53L0X_write_dword(deviceAddress, index, data);

	if (status_int != 0)
		Status = VL53L0X_ERROR_CONTROL_INTERFACE;

    return Status;
}

VL53L0X_Error VL53L0X_UpdateByte(VL53L0X_DEV Dev, uint8_t index, uint8_t AndData, uint8_t OrData){
    VL53L0X_Error Status = VL53L0X_ERROR_NONE;
    int32_t status_int;
    uint8_t deviceAddress;
    uint8_t data;

    deviceAddress = Dev->I2cDevAddr;

    status_int = VL53L0X_read_byte(deviceAddress, index, &data);

    if (status_int != 0)
        Status = VL53L0X_ERROR_CONTROL_INTERFACE;

    if (Status == VL53L0X_ERROR_NONE) {
        data = (data & AndData) | OrData;
        status_int = VL53L0X_write_byte(deviceAddress, index, data);

        if (status_int != 0)
            Status = VL53L0X_ERROR_CONTROL_INTERFACE;
    }

    return Status;
}

VL53L0X_Error VL53L0X_RdByte(VL53L0X_DEV Dev, uint8_t index, uint8_t *data){
    VL53L0X_Error Status = VL53L0X_ERROR_NONE;
    int32_t status_int;
    uint8_t deviceAddress;

    deviceAddress = Dev->I2cDevAddr;

    status_int = VL53L0X_read_byte(deviceAddress, index, data);

    if (status_int != 0)
        Status = VL53L0X_ERROR_CONTROL_INTERFACE;

    return Status;
}

VL53L0X_Error VL53L0X_RdWord(VL53L0X_DEV Dev, uint8_t index, uint16_t *data){
    VL53L0X_Error Status = VL53L0X_ERROR_NONE;
    int32_t status_int;
    uint8_t deviceAddress;

    deviceAddress = Dev->I2cDevAddr;

    status_int = VL53L0X_read_word(deviceAddress, index, data);

    if (status_int != 0)
        Status = VL53L0X_ERROR_CONTROL_INTERFACE;

    return Status;
}

VL53L0X_Error  VL53L0X_RdDWord(VL53L0X_DEV Dev, uint8_t index, uint32_t *data){
    VL53L0X_Error Status = VL53L0X_ERROR_NONE;
    int32_t status_int;
    uint8_t deviceAddress;

    deviceAddress = Dev->I2cDevAddr;

    status_int = VL53L0X_read_dword(deviceAddress, index, data);

    if (status_int != 0)
        Status = VL53L0X_ERROR_CONTROL_INTERFACE;

    return Status;
}

#define VL53L0X_POLLINGDELAY_LOOPNB  250
VL53L0X_Error VL53L0X_PollingDelay(VL53L0X_DEV Dev){
    VL53L0X_Error status = VL53L0X_ERROR_NONE;
    volatile uint32_t i;
    LOG_FUNCTION_START("");

    for(i=0;i<VL53L0X_POLLINGDELAY_LOOPNB;i++){
        //Do nothing
        asm("nop");
    }

    LOG_FUNCTION_END(status);
    return status;
}