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| ezeio2:scriptref:bufdec [2019-06-16 03:02] – created andreh | ezeio2:scriptref:bufdec [2023-08-18 23:50] (current) – andreh | ||
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| - | ===== Script reference ====== | + | ==== BufDec ==== |
| - | + | ||
| - | ==== BufDec( buf[], offset, method ) ==== | + | |
| Decode a part of a buffer into a scalar | Decode a part of a buffer into a scalar | ||
| Line 19: | Line 17: | ||
| Available methods: | Available methods: | ||
| ^ Method ^ Length ^ Type ^ Description ^ | ^ Method ^ Length ^ Type ^ Description ^ | ||
| + | ^ BT_INT8 | 8 bit | signed integer | Single octet value | | ||
| + | ^ BT_UINT8 | 8 bit | unsigned integer | Single octet value | | ||
| ^ BT_INT16 | 16 bit | signed integer | Big endian integer | | ^ BT_INT16 | 16 bit | signed integer | Big endian integer | | ||
| ^ BT_UINT16 | 16 bit | unsigned integer | Big endian integer | | ^ BT_UINT16 | 16 bit | unsigned integer | Big endian integer | | ||
| Line 25: | Line 25: | ||
| ^ BT_INT32LE | 32 bit | signed integer | Little endian integer | | ^ BT_INT32LE | 32 bit | signed integer | Little endian integer | | ||
| ^ BT_UINT32LE | 32 bit | unsigned integer | Little endian integer | | ^ BT_UINT32LE | 32 bit | unsigned integer | Little endian integer | | ||
| + | ^ BT_INT32BLE | 32 bit | signed integer | Big-Little endian integer | | ||
| + | ^ BT_UINT32BLE | 32 bit | unsigned integer | Big-Little endian integer | | ||
| + | ^ BT_INT32LBE | 32 bit | signed integer | Little-Big endian integer | | ||
| + | ^ BT_UINT32LBE | 32 bit | unsigned integer | Little-Bit endian integer | | ||
| ^ BT_FLOAT | 32 bit | float | IEEE 732 floating point | | ^ BT_FLOAT | 32 bit | float | IEEE 732 floating point | | ||
| + | ^ BT_FLOATLE | 32 bit | float | IEEE 732 floating point little endian | | ||
| + | ^ BT_FLOAT64 | 64 bit | float64 | IEEE 732 64-bit floating point (converts to 32 bit float) | | ||
| + | ^ BT_FLOAT64LE | 64 bit | float64 | IEEE 732 64-bit floating point little endian (converts to 32 bit float) | | ||
| Also available for decoding bitmaps: | Also available for decoding bitmaps: | ||
| Line 39: | Line 46: | ||
| Returns the decoded value | Returns the decoded value | ||
| + | |||
| + | Note that the returned value is always a 32 bit cell (signed 32 bit integer or 32 bit float). | ||
| === Example usage === | === Example usage === | ||
| <code javascript> | <code javascript> | ||
| - | + | new x; | |
| + | new s{10}; | ||
| + | |||
| + | if(ModbusRead(5, | ||
| + | x = BufDec(s, 0, BT_INT32); | ||
| + | // ..further processing | ||
| + | } | ||
| </ | </ | ||