Peter M. Groen / libmodbus

Commit 1776a3503c4b75b049fb7ca446a962a9f142286a

Authored by Michael Heimpold
1 parent 8a7e2446

Add some more macros for data manipulation 

Signed-off-by: Michael Heimpold <mhei@heimpold.de>
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Showing 2 changed files with 23 additions and 0 deletions
doc/libmodbus.txt
  View file @1776a35
... ... @@ -143,12 +143,18 @@ Macros for data manipulation::
143 143  
144 144 - MODBUS_GET_HIGH_BYTE(data), extracts the high byte from a byte
145 145 - MODBUS_GET_LOW_BYTE(data), extracts the low byte from a byte
  146 +- MODBUS_GET_INT64_FROM_INT16(tab_int16, index), builds an int64 from the four
  147 + first int16 starting at tab_int16[index]
146 148 - MODBUS_GET_INT32_FROM_INT16(tab_int16, index), builds an int32 from the two
147 149 first int16 starting at tab_int16[index]
148 150 - MODBUS_GET_INT16_FROM_INT8(tab_int8, index), builds an int16 from the two
149 151 first int8 starting at tab_int8[index]
150 152 - MODBUS_SET_INT16_TO_INT8(tab_int8, index, value), set an int16 value into
151 153 the two first bytes starting at tab_int8[index]
  154 +- MODBUS_SET_INT32_TO_INT16(tab_int16, index, value), set an int32 value into
  155 + the two first int16 starting at tab_int16[index]
  156 +- MODBUS_SET_INT64_TO_INT16(tab_int16, index, value), set an int64 value into
  157 + the four first int16 starting at tab_int16[index]
152 158  
153 159 Handling of bits and bytes::
154 160 linkmb:modbus_set_bits_from_byte[3]
... ...
src/modbus.h
  View file @1776a35
... ... @@ -230,6 +230,11 @@ MODBUS_API int modbus_reply_exception(modbus_t *ctx, const uint8_t *req,
230 230  
231 231 #define MODBUS_GET_HIGH_BYTE(data) (((data) >> 8) & 0xFF)
232 232 #define MODBUS_GET_LOW_BYTE(data) ((data) & 0xFF)
  233 +#define MODBUS_GET_INT64_FROM_INT16(tab_int16, index) \
  234 + (((int64_t)tab_int16[(index) ] << 48) + \
  235 + ((int64_t)tab_int16[(index) + 1] << 32) + \
  236 + ((int64_t)tab_int16[(index) + 2] << 16) + \
  237 + (int64_t)tab_int16[(index) + 3])
233 238 #define MODBUS_GET_INT32_FROM_INT16(tab_int16, index) ((tab_int16[(index)] << 16) + tab_int16[(index) + 1])
234 239 #define MODBUS_GET_INT16_FROM_INT8(tab_int8, index) ((tab_int8[(index)] << 8) + tab_int8[(index) + 1])
235 240 #define MODBUS_SET_INT16_TO_INT8(tab_int8, index, value) \
... ... @@ -237,6 +242,18 @@ MODBUS_API int modbus_reply_exception(modbus_t *ctx, const uint8_t *req,
237 242 tab_int8[(index)] = (value) >> 8; \
238 243 tab_int8[(index) + 1] = (value) & 0xFF; \
239 244 } while (0)
  245 +#define MODBUS_SET_INT32_TO_INT16(tab_int16, index, value) \
  246 + do { \
  247 + tab_int16[(index) ] = (value) >> 16; \
  248 + tab_int16[(index) + 1] = (value); \
  249 + } while (0)
  250 +#define MODBUS_SET_INT64_TO_INT16(tab_int16, index, value) \
  251 + do { \
  252 + tab_int16[(index) ] = (value) >> 48; \
  253 + tab_int16[(index) + 1] = (value) >> 32; \
  254 + tab_int16[(index) + 2] = (value) >> 16; \
  255 + tab_int16[(index) + 3] = (value); \
  256 + } while (0)
240 257  
241 258 MODBUS_API void modbus_set_bits_from_byte(uint8_t *dest, int idx, const uint8_t value);
242 259 MODBUS_API void modbus_set_bits_from_bytes(uint8_t *dest, int idx, unsigned int nb_bits,
... ...