ifx_i2c_config.c File Reference

This file provides the ifx i2c platform specific context configurations. More...

#include "pal_ifx_i2c_config.h"
#include "ifx_i2c_config.h"

Include dependency graph for ifx_i2c_config.c:

Variables
ifx_i2c_datastore_config_t	ifx_i2c_datastore_config
	This is Data Store context. Only one context is supported per slave. More...
ifx_i2c_context_t	ifx_i2c_context_0
	This is IFX I2C context. Only one context is supported per slave. More...

Detailed Description

This file provides the ifx i2c platform specific context configurations.

Copyright

MIT License

Copyright (c) 2019 Infineon Technologies AG

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE

\endcopyright

Author

Infineon Technologies AG

Variable Documentation

ifx_i2c_context_0

ifx_i2c_context_t ifx_i2c_context_0

Initial value:

=
{
    
    0x30,
    
    400,
    
    IFX_I2C_FRAME_SIZE,
    
    &optiga_vdd_0,
    
    &optiga_reset_0,
    
    &optiga_pal_i2c_context_0,

    
    &ifx_i2c_datastore_config

}

This is IFX I2C context. Only one context is supported per slave.

IFX I2C Instance.

• The following parameters in ifx_i2c_context_t must be initialized with appropriate values
  
  • slave address : Address of I2C slave
  • frame_size : Frame size in bytes. Minimum supported value is 16 bytes.
    
    • It is recommended not to use a value greater than the slave's frame size.
    • The user specified frame size is written to I2C slave's frame size register. The frame size register is read back from I2C slave. This frame value is used by the ifx-i2c protocol even if it is not equal to the user specified value.
  • frequency : Frequency/speed of I2C master in KHz.
    • This must be lowest of the maximum frequency supported by the devices (master/slave) connected on the bus.
    • Initial negotiation starts with a frequency of 100KHz.
    • If the user specified frequency is more than 400 KHz, the I2C slave is configured to operate in "Fm+" mode, otherwise the I2C slave is configured for "SM & Fm" mode.
      
    • If the user specified frequency negotiation fails, the I2C master frequency remains at 100KHz
      
  • upper_layer_event_handler : Upper layer event handler. This is invoked when ifx_i2c_open() is asynchronously completed.
  • upper_layer_ctx : Context of upper layer.
  • p_slave_vdd_pin : GPIO pin for VDD. If not set, cold reset is not done.
  • p_slave_reset_pin : GPIO pin for Reset. If not set, warm reset is not done.
  • ifx_i2c_datastore_config : Data store configuration instance
• The other fields must be initialized by the user of the structure.

ifx_i2c_datastore_config

ifx_i2c_datastore_config_t ifx_i2c_datastore_config

Initial value:

=
{
    
    PROTOCOL_VERSION_PRE_SHARED_SECRET,
    
    OPTIGA_PLATFORM_BINDING_SHARED_SECRET_ID,
    
    OPTIGA_COMMS_MANAGE_CONTEXT_ID,
    
    0x40,
}

This is Data Store context. Only one context is supported per slave.

• The following parameters in ifx_i2c_datastore_config_t must be initialized with appropriate values
  
  • protocol_version : Protocol version supported for secure communication.
  • datastore_shared_secret_id : ID to read and write the shared secret.
  • datastore_shared_secret_id : ID to read and write the shielded connection context data.
    
  • shared_secret_length : Max supported shared secret length.