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ci_protocol_stream.c File Reference

Stream protocol source file that implemments the streaming functionality. More...

`#include "isf_target.h"`
`#include "isf.h"`
`#include "isf_ci.h"`
`#include "lwevent.h"`
`#include "lwsem.h"`
`#include "task_ci.h"`
`#include "ci_protocol_stream.h"`
`#include "isf_ci_stream.h"`
`#include "isf_util.h"`
`#include "crc.h"`
Include dependency graph for ci_protocol_stream.c:

Go to the source code of this file.

## Functions
uint32 | ci_stream_get_num_trig_bytes (uint8 anumElements)
uint32 | ci_stream_get_num_element_bytes (uint8 anumElements)
void | byteswap (uint8 *p1, uint8 *p2)
isf_status_t | ci_stream_init (uint8 aprotocolID, void *apInitData)
| This is a CI stream protocol intialization callback function pointer. More...
ci_stream_config_t * | isf_ci_stream_get_first (void)
| This API returns the configuration of the first stream in the linked list. More...
ci_stream_config_t * | isf_ci_stream_get_next (void)
| This API returns the configuration of the next stream in the linked list. More...
ci_stream_config_t * | isf_ci_stream_get (uint8 aStreamID)
isf_status_t | isf_ci_stream_delete (uint8 aStreamID)
| This API deletes the given stream ID. More...
isf_status_t | isf_ci_stream_create (uint8 aStreamID, uint8 aNumElements, uint8 *apTriggerMask, ci_stream_element_t *apElementList)
| This API creates a stream. More...
isf_status_t | isf_ci_stream_update_data (uint8 aDataSetID, uint16 aLength, uint16 aOffset, uint8 *apSrc)
| This API updates the data of a dataset. More...
uint8 | isf_ci_stream_get_num_streams (void)
| This API returns the number of streams. More...
isf_status_t | isf_ci_stream_get_trigger (uint8 aStreamID, uint8 *apTrigger)
| This API returns the trigger state of the given stream ID. More...
isf_status_t | isf_ci_stream_reset_trigger (uint8 aStreamID)
| This API resets the trigger bits of the the given stream ID. More...
void | isf_ci_stream_set_CRC (boolean acrcEnable)
| This API sets the cyclic redundancy check (CRC) code generation to the requested state. More...
isf_status_t | ci_protocol_CB_stream (uint32 anumBytes, uint8 *apSrc, uint32 *apnumDestBytes, uint8 *apDest)
| This is a CI stream protocol callback function pointer. More...

## Detailed Description

Stream protocol source file that implemments the streaming functionality.

Definition in file ci_protocol_stream.c.

## Function Documentation

__inline void byteswap | ( | uint8 * | p1,
|  | uint8 * | p2
| ) |  |

Definition at line 78 of file ci_protocol_stream.c.

isf_status_t ci_protocol_CB_stream | ( | uint32 | anumBytes,
|  | uint8 * | apSrc,
|  | uint32 * | apnumDestBytes,
|  | uint8 * | apDest
| ) |  |

This is a CI stream protocol callback function pointer.

A callback that implements the CI stream protocol. This callback is invoked if a packet is received with a protocol ID matching the ID that was assigned to this protocol during initialization.

Parameters

  [in] | anumBytes | The number of bytes that the host has sent to the protocol. The data resides in the apSrc buffer.
  [in] | apSrc | Pointer to the received data from the host.
  [in,out] | apnumDestBytes | As an input, this parameter specifies maxinum size of the destination buffer apDest. As an output this parameter specifies the actual size of the number of bytes used in the buffer apDest.
  [out] | apDest | Pointer to the processed data.

Return values

  The | callback function returns the protocol ID value of the next protocol to be invoked. If no more protocols are to be called, the callback function returns a zero to notify the CI to sends the destination buffer to the host.

Constraints:
  The following constraints must be observed when using this function. If these constraints are not met, this API returns an error.
  - anumSrcBytes must be equal to or greater than the minimum number of bytes the specific protocol may require. This requirement is protocol dependent.

Reentrant: No

Link Libraries:
  libisf_core_m0p.a, libisf_core_m4f.a, libisf_core_m4.a

See also
  isf_status_t

Definition at line 1016 of file ci_protocol_stream.c.

References ci_stream_ctrl_reg1_t::Bits, ccitt_crc16_cal(), CI_ALLOC_MEM_ZERO, CI_CMD_STREAM_CREATE_STREAM, CI_CMD_STREAM_DELETE_STREAM, CI_CMD_STREAM_DISABLE_CRC, CI_CMD_STREAM_DISABLE_DATA_UPDATE, CI_CMD_STREAM_ENABLE_CRC, CI_CMD_STREAM_ENABLE_DATA_UPDATE, CI_CMD_STREAM_GETINFO_GET_FIRST_STREAMID, CI_CMD_STREAM_GETINFO_GET_NEXT_STREAMID, CI_CMD_STREAM_GETINFO_NUMBER_STREAMS, CI_CMD_STREAM_GETINFO_STREAM_CONFIG, CI_CMD_STREAM_GETINFO_TRIGGER_STATE, CI_CMD_STREAM_RESET, CI_CMD_STREAM_RESET_TRIGGER, CI_COPY_MEM, CI_FREE_MEM, ci_send_packet(), CI_STATUS_STREAM_ERR, CI_STATUS_STREAM_ERR_CRC, CI_STATUS_STREAM_ERR_INVALID_CMD, CI_STATUS_STREAM_ERR_INVALID_NUM_PARM, CI_STATUS_STREAM_ERR_INVALID_PARM, CI_STATUS_STREAM_ERR_OUT_OF_MEMORY, CI_STATUS_STREAM_ERR_STREAM_NOEXISTS, CI_STATUS_STREAM_ERR_STREAMID_NOEXISTS, CI_STATUS_STREAM_STREAM_END_OF_LIST, ci_stream_config_t, ci_stream_element_t, ci_stream_get_host_cmd, ci_stream_get_num_element_bytes(), ci_stream_get_num_trig_bytes(), CI_STREAM_NUMELEMENTS_BYTESIZE, CI_STREAM_OUTPUTPACKET_STREAMID_BYTESIZE, cmd_createstream_get_numelements, cmd_createstream_get_streamID, cmd_createstream_get_trigmask_ptr, ci_stream_ctrl_reg1_t::enable_crc, ci_stream_ctrl_reg1_t::enable_stream_data, FALSE, isf_ci_stream_create(), isf_ci_stream_delete(), isf_ci_stream_get_first(), isf_ci_stream_get_next(), isf_ci_stream_get_num_streams(), isf_ci_stream_reset_trigger(), isf_ci_stream_set_CRC(), ISF_SUCCESS, STREAM_COCO_BIT_MASK, STREAM_CRC_BYTESIZE, STREAM_CRC_DISABLED, STREAM_CRC_ENABLED, STREAM_PROTOCOL_CMD_BYTESIZE, STREAM_PROTOCOL_DATA_DISABLED, STREAM_PROTOCOL_DATA_ENABLED, STREAM_PROTOCOL_RECV_MIN_BYTESIZE, STREAM_PROTOCOL_RESP_DEFAULT_ARRAY_BYTESIZE, STREAM_PROTOCOL_RESP_INDEX_CMD_ECHO, STREAM_PROTOCOL_RESP_INDEX_COCO_STAT, STREAM_PROTOCOL_RESP_INDEX_DATASTART, STREAM_PROTOCOL_RESP_INDEX_NUMDATA_LSB, STREAM_PROTOCOL_RESP_INDEX_NUMDATA_MSB, STREAM_PROTOCOL_RESP_INDEX_PROTOCOLID, STREAM_PROTOCOL_RESP_MIN_BYTESIZE, STREAM_PROTOCOL_RESP_RESPDATALENGTH_BYTESIZE, ci_stream_regs_t::StreamCtrlReg1, and TRUE.

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uint32 ci_stream_get_num_element_bytes | ( | uint8 | anumElements | ) |
| inline

Definition at line 72 of file ci_protocol_stream.c.

References ci_stream_element_t.

Referenced by ci_protocol_CB_stream(), and isf_ci_stream_create().

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uint32 ci_stream_get_num_trig_bytes | ( | uint8 | anumElements | ) |
| inline

Definition at line 64 of file ci_protocol_stream.c.

Referenced by ci_protocol_CB_stream(), isf_ci_stream_create(), isf_ci_stream_get_trigger(), isf_ci_stream_reset_trigger(), and isf_ci_stream_update_data().

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isf_status_t ci_stream_init | ( | uint8 | aprotocolID,
|  | void * | apInitData
| ) |  |

This is a CI stream protocol intialization callback function pointer.

A callback that implements the initialization for the CI stream protocol.

Parameters

  [in] | aprotocolID | The protocol ID assigned to the protocol. The protocol initialization function is required to save the ID and include the ID in data packets sent back to the host.
  [in] | apInitData | Pointer to the user defined data.

Return values

  ISF_SUCCESS | The initialization callback completed successfully.
  ISF_ERR_LIB_INIT | The initialization callback failed to initialize.

Constraints:
  None

Reentrant: No

Link Libraries:
  libisf_core_m0p.a, libisf_core_m4f.a, libisf_core_m4.a

See also
  isf_status_t

Definition at line 86 of file ci_protocol_stream.c.

References ISF_ERR_LIB_INIT, and ISF_SUCCESS.

isf_status_t isf_ci_stream_create | ( | uint8 | aStreamID,
|  | uint8 | aNumElements,
|  | uint8 * | apTriggerMask,
|  | ci_stream_element_t * | apElementList
| ) |  |

This API creates a stream.

This API creates a stream with the given parameters. It dynamically allocates memory to create a buffer to store all the information required to operation the stream.

Parameters

  [in] | aStreamID | Stream ID value.
  [in] | aNumElements | The number of elements or datasets in the stream.
  [in] | apTriggerMask | Pointer to the trigger mask buffer. This buffer consists if an array of byte(s) with each bit corresponding a dataset in the element list. Bit 0 of the first trigger byte corresponds to the first dataset in apElementList. Bit 1 of the first trigger byte corresponds to the second dataset in apElementList and so on. Each trigger byte can respresent up to 8 datasets in apElementList.

During the creation process, the data from this buffer is copied over to the stream being created.

Parameters

  [in] | apElementList | Pointer to a buffer containing a list of datasets. Each dataset is defined in the list as follows:

Offset Size Description 0 1 byte Dataset ID 1 2 bytes Length, msb first 3 2 bytes Offset, msb first

During the creation process, the data from this buffer is copied over to the stream being created.

Returns
  isf_ci_stream_create() returns a value of type isf_status_t providing the status of the stream creation operation.

Return values

  ISF_SUCCESS | The stream was created successfully.
  CI_STATUS_STREAM_ERR_NULL_POINTER | The apTriggerMask and/or the apElementList pointers are NULL.
  CI_STATUS_STREAM_ERR_INVALID_NUM_PARM | The number of parameter bytes provided to create the stream is not sufficient.
  CI_STATUS_STREAM_ERR_NUMELEMENTS_INVALID | The aNumElements value is zero.
  CI_STATUS_STREAM_ERR_STREAMID_EXISTS | The aStreamID value specifies a stream ID that already exists.
  CI_STATUS_STREAM_ERR_OUT_OF_MEMORY | The system is out of memory and the stream cannot be created.

Constraints:
  The following constraints must be observed when using this function. If these constraints are not met, this API returns an error.
  - aStreamID must refer to a stream that does NOT exists.
  - apTriggerMask and apElementList must not be NULL.
  - aNumElements must not be zero.

Reentrant: Yes.

Link Libraries:
  libisf_core_m0p.a, libisf_core_m4f.a, libisf_core_m4.a

Definition at line 250 of file ci_protocol_stream.c.

References CI_ALLOC_MEM_ZERO, CI_COPY_MEM, CI_FREE_MEM, CI_STATUS_STREAM_DATA_UPDATE, CI_STATUS_STREAM_ERR_NULL_POINTER, CI_STATUS_STREAM_ERR_NUMELEMENTS_INVALID, CI_STATUS_STREAM_ERR_OUT_OF_MEMORY, CI_STATUS_STREAM_ERR_STREAMID_EXISTS, ci_stream_config_t, ci_stream_element_t, ci_stream_get_num_element_bytes(), ci_stream_get_num_trig_bytes(), ci_stream_instance_t, ISF_SUCCESS, STREAM_COCO_BIT_MASK, STREAM_CRC_BYTESIZE, STREAM_PROTOCOL_OUTPUTPACKET_INDEX_COCO_STAT, STREAM_PROTOCOL_OUTPUTPACKET_INDEX_LENGTH_LSB, STREAM_PROTOCOL_OUTPUTPACKET_INDEX_LENGTH_MSB, STREAM_PROTOCOL_OUTPUTPACKET_INDEX_PROTOCOLID, STREAM_PROTOCOL_OUTPUTPACKET_INDEX_STREAMID, and TRUE.

Referenced by ci_protocol_CB_stream().

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isf_status_t isf_ci_stream_delete | ( | uint8 | aStreamID | ) |

This API deletes the given stream ID.

This API deletes the given stream ID. Its memory is deallocated and the stream linked list is reordered.

Parameters

  [in] | aStreamID | Stream ID value of the stream to delete.

Returns
  isf_ci_stream_delete() returns a value of type isf_status_t providing the status of the stream creation operation.

Return values

  ISF_SUCCESS | The stream ID was found and the stream deleted.
  CI_STATUS_STREAM_ERR_STREAM_NOEXISTS | The aStreamID value specifies a stream ID that does not exists.

Constraints:
  The following constraints must be observed when using this function. If these constraints are not met, this API returns an error.
  - aStreamID must refer to a stream that exists.

Reentrant: Yes.

Link Libraries:
  libisf_core_m0p.a, libisf_core_m4f.a, libisf_core_m4.a

Definition at line 175 of file ci_protocol_stream.c.

References CI_FREE_MEM, CI_STATUS_STREAM_ERR_STREAM_NOEXISTS, CI_STATUS_STREAM_ERR_STREAMID_NOEXISTS, and ISF_SUCCESS.

Referenced by ci_protocol_CB_stream().

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ci_stream_config_t* isf_ci_stream_get | ( | uint8 | aStreamID | ) |

Definition at line 160 of file ci_protocol_stream.c.

References ci_stream_config_t.

ci_stream_config_t* isf_ci_stream_get_first | ( | void |  | ) |

This API returns the configuration of the first stream in the linked list.

This API returns a pointer to the configuration of the first stream in the linked list. If no stream exists, NULL is returned.

Returns
  isf_ci_stream_get_first() returns a pointer to the configuration of the first stream.

Constraints:
  None

Reentrant: Yes.

Link Libraries:
  libisf_core_m0p.a, libisf_core_m4f.a, libisf_core_m4.a

See also
  isf_ci_stream_get_next()

Definition at line 121 of file ci_protocol_stream.c.

References ci_stream_config_t.

Referenced by ci_protocol_CB_stream().

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ci_stream_config_t* isf_ci_stream_get_next | ( | void |  | ) |

This API returns the configuration of the next stream in the linked list.

This API returns a pointer to the configuration of the next stream in the linked list. The stream returned is the next stream in the list from the previous isf_ci_stream_get_first() or isf_ci_stream_get_next() call. If no stream exists, NULL is returned.

Returns
  isf_ci_stream_get_next() returns a pointer to the configuration of the next stream in the linked list.

Constraints:
  None

Reentrant: Yes.

Link Libraries:
  libisf_core_m0p.a, libisf_core_m4f.a, libisf_core_m4.a

See also
  isf_ci_stream_get_next()

Definition at line 140 of file ci_protocol_stream.c.

References ci_stream_config_t.

Referenced by ci_protocol_CB_stream().

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uint8 isf_ci_stream_get_num_streams | ( | void |  | ) |

This API returns the number of streams.

This API returns the number of streams that currently exists.

Returns
  isf_ci_stream_get_num_streams() returns the number of streams that currently exists.

Constraints:
  None

Reentrant: Yes.

Link Libraries:
  libisf_core_m0p.a, libisf_core_m4f.a, libisf_core_m4.a

Definition at line 646 of file ci_protocol_stream.c.

Referenced by ci_protocol_CB_stream().

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isf_status_t isf_ci_stream_get_trigger | ( | uint8 | aStreamID,
|  | uint8 * | apTrigger
| ) |  |

This API returns the trigger state of the given stream ID.

This API returns the trigger state bytes of the given stream ID. The trigger state is copied to the trigger buffer provided by the caller.

Parameters

  [in] | aStreamID | Stream ID value of the stream to get the trigger state.
  [in,out] | apTrigger | Pointer to the trigger byte array. The trigger state of the stream is copied to this byte array. This value is NULL if the stream ID does not exists. The caller must provide an array large enough to hold all of the trigger bytes.

Each bit in the trigger byte corresponds to a dataset.

Returns
  isf_ci_stream_get_trigger() returns a value of type isf_status_t providing the status of the stream creation operation.

Return values

  ISF_SUCCESS | The stream ID was found and its trigger state reset to the trigger mask.
  CI_STATUS_STREAM_ERR | apTrigger is NULL.
  CI_STATUS_STREAM_ERR_STREAM_NOEXISTS | The aStreamID value specifies a stream ID that does not exists.

Constraints:
  The following constraints must be observed when using this function. If these constraints are not met, this API returns an error.
  - aStreamID must refer to a stream that exists.
  - apTrigger must not be NULL.

Reentrant: Yes.

Link Libraries:
  libisf_core_m0p.a, libisf_core_m4f.a, libisf_core_m4.a

Definition at line 662 of file ci_protocol_stream.c.

References CI_STATUS_STREAM_ERR, CI_STATUS_STREAM_ERR_STREAMID_NOEXISTS, ci_stream_get_num_trig_bytes(), and ISF_SUCCESS.

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isf_status_t isf_ci_stream_reset_trigger | ( | uint8 | aStreamID | ) |

This API resets the trigger bits of the the given stream ID.

This API resets the trigger state of the given stream ID. The trigger state is set to the trigger mask that was provided during stream creation.

Parameters

  aStreamID | Stream ID value of the stream to reset the trigger state.

Returns
  isf_ci_stream_reset_trigger() returns a value of type isf_status_t providing the status of the stream creation operation.

Return values

  ISF_SUCCESS | The stream ID was found and its trigger state reset to the trigger mask.
  CI_STATUS_STREAM_ERR_STREAM_NOEXISTS | The aStreamID value specifies a stream ID that does not exists.

Constraints:
  The following constraints must be observed when using this function. If these constraints are not met, this API returns an error.
  - aStreamID must refer to a stream that exists.

Reentrant: Yes.

Link Libraries:
  libisf_core_m0p.a, libisf_core_m4f.a, libisf_core_m4.a

Definition at line 699 of file ci_protocol_stream.c.

References CI_STATUS_STREAM_ERR_STREAMID_NOEXISTS, ci_stream_get_num_trig_bytes(), and ISF_SUCCESS.

Referenced by ci_protocol_CB_stream().

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void isf_ci_stream_set_CRC | ( | boolean | acrcEnable | ) |

This API sets the cyclic redundancy check (CRC) code generation to the requested state.

This API is used to enable or disable the CRC state. If enabled, CRC code is generated and sent as part of any data packets going to the host for the stream protocol. Also, any packet received from the host is expected to have a CRC bytes that are checked against the received data. If disabled, no CRC data is generated for packets going to the host and no CRC check is performed for packets received from the host.

The CRC used by the stream protocol is the CCITT CRC16. This method uses two bytes (16-bit). If CRC bytes are generated for a data packet destined for the host, the bytes are placed at the end of the packet but before the end marker byte (0x7E). The same CRC byte placement is expected of data packets from the host to the stream protocol.

If CRC is enabled by the host using the CI_CMD_STREAM_ENABLE_CRC command, the response packet to the host for this command will have the CRC bytes as part of the packet.

If CRC is disabled by the host using the CI_CMD_STREAM_DISABLE_CRC command, the response packet to the host for this command will NOT have the CRC bytes as part of the packet.

Parameters

  [in] | acrcEnable | Requested state of CRC. STREAM_CRC_ENABLED to enable CRC generation and checking. STREAM_CRC_DISABLED to disabke CRC generation and checking.

Returns
  None

Constraints:
  None

Reentrant: Yes.

Link Libraries:
  libisf_core_m0p.a, libisf_core_m4f.a, libisf_core_m4.a

See also
  isf_ci_stream_get_next()

Definition at line 731 of file ci_protocol_stream.c.

References ci_stream_ctrl_reg1_t::Bits, ci_stream_ctrl_reg1_t::enable_crc, STREAM_CRC_DISABLED, STREAM_CRC_ENABLED, and ci_stream_regs_t::StreamCtrlReg1.

Referenced by ci_protocol_CB_stream().

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isf_status_t isf_ci_stream_update_data | ( | uint8 | aDataSetID,
|  | uint16 | aLength,
|  | uint16 | aOffset,
|  | uint8 * | apSrc
| ) |  |

This API updates the data of a dataset.

This API updates the data of the given dataset ID. The data is updated under two conditions that must exist:

- The dataset ID exists in a stream. Streams can contain multiple datasets with the same ID and these datasets may have lengths and offsets that are the same or different.
- The dataset region as defined in the stream overlaps with the given region provided in the parameters.

If a dataset in any streams meet these conditions, the overlapped region of the dataset data is updated and the trigger state bit associated with the dataset ID is cleared. If all trigger state bits of the stream is cleared, the data is sent to the host if stream update is enabled.

Parameters

  [in] | aDataSetID | ID of the dataset to update
  [in] | aLength | The byte length of data to update.
  [in] | aOffset | The offset of the data to update. It references the offset of the data buffer that the application makes available to the host.
  [in] | apSrc | Pointer to the source of the data to perform the update. If the dataset ID matches and the data region overlaps, the source data is copied to the stream buffer.

Returns
  isf_ci_stream_update_data() returns a value of type isf_status_t providing the status of the data update operation.

Return values

  ISF_SUCCESS | Dataset(s) data were updated. No data was sent to the host because not all trigger state bits are cleared.
  CI_STATUS_STREAM_ERR_NULL_POINTER | The apSrc is NULL.
  CI_STATUS_STREAM_ERR_DATASET_LENGTH_INVALID | The aLength value is zero.
  CI_STATUS_STREAM_ERR_SENDDATA_TO_HOST | An error was encountered in sending data to the host.
  CI_STATUS_STREAM_DATASETID_NOTUSED | The dataset ID was not found in any streams. No data was updated.
  CI_STATUS_STREAM_DATA_UPDATE | An update data packet was sent to the host.

Constraints:
  The following constraints must be observed when using this function. If these constraints are not met, this API returns an error.
  - aDataSetID must refer to a dataset that exists.
  - aLength must not be zero.
  - apSrc must not be NULL.

Reentrant: Yes.

Link Libraries:
  libisf_core_m0p.a, libisf_core_m4f.a, libisf_core_m4.a

Definition at line 456 of file ci_protocol_stream.c.

References ci_stream_ctrl_reg1_t::Bits, ccitt_crc16_cal(), CI_COPY_MEM, ci_send_packet(), CI_STATUS_STREAM_DATA_UPDATE, CI_STATUS_STREAM_DATASETID_NOTUSED, CI_STATUS_STREAM_ERR_DATASET_LENGTH_INVALID, CI_STATUS_STREAM_ERR_NULL_POINTER, CI_STATUS_STREAM_ERR_SENDDATA_TO_HOST, CI_STREAM_DATASET_ID_BYTESIZE, ci_stream_element_t, ci_stream_get_num_trig_bytes(), CI_STREAM_OUTPUTPACKET_LENGTH_BYTESIZE, CI_STREAM_OUTPUTPACKET_STREAMID_BYTESIZE, CI_STREAM_PROTOCOL_ID_BYTESIZE, ci_stream_ctrl_reg1_t::enable_crc, ci_stream_ctrl_reg1_t::enable_stream_data, FALSE, ISF_SUCCESS, STREAM_CRC_BYTESIZE, STREAM_CRC_ENABLED, STREAM_PROTOCOL_CMD_STATUS_BYTESIZE, STREAM_PROTOCOL_DATA_ENABLED, STREAM_PROTOCOL_OUTPUTPACKET_INDEX_LENGTH_LSB, STREAM_PROTOCOL_OUTPUTPACKET_INDEX_LENGTH_MSB, ci_stream_regs_t::StreamCtrlReg1, and TRUE.

Referenced by App1_MainTask().

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- © Freescale Semiconductor, Inc. 2015. All Rights Reserved.