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en:mervis-ide:30-communication-protocols:10-sscp [2017/06/30 08:32] m.chlupac ↷ Page moved from en:mervis-ide:communication-protocols:10-sscp to en:mervis-ide:30-communication-protocols:10-sscp |
en:mervis-ide:30-communication-protocols:10-sscp [2017/11/22 10:56] |
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| - | ====== SSCP protocol ====== | ||
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| - | Mervis controllers support full configuration and communication via SSCP protocol. Detail description of this protocol is available in: {{: | ||
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| - | ===== Basic features ===== | ||
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| - | * Protocol is defined on application layer | ||
| - | * TCP and serial bus implementations are currently available. UDP is used for autodetection and configuration. | ||
| - | * Simple structure of communicated data packets | ||
| - | * Easy to calculate packet size from header. | ||
| - | * Extra headers and suffixes can be added for different communication layers - inner structure stays untouched. | ||
| - | * Each data packet (except broadcast packets) carries information about destination address (8 bit slave ID). Only controller with that address is expected to respond. | ||
| - | * SSCP can be used for any and all communication tasks | ||
| - | * Communication of statistics, configuration, | ||
| - | * Communication buffer size can be negotiated by client | ||
| - | * Client authentication is required. | ||
| - | * [[en: | ||
| - | * Protocol versioning is supported. Newer version is backward compatible with previous version but usage of deprecated and obsolote methods is not recommended. | ||
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| - | ===== Communication of Values ===== | ||
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| - | * SSCP protocol supports long memory blocks. If the size of the buffer is not sufficient - multiple reads can be made and atomicity of the operation is guaranteed. | ||
| - | * Every variable is identified by its communication ID. | ||
| - | * Value is communicated as a block of memory. Offset and length can be used to read part of the larger data structure (array, struct, function block, ...) | ||
| - | * Memory data layout follows standard rules of data alignment (1-8 bytes) | ||
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