1、【修复】FreeModbus V1.5从机源码中遗留的读保持寄存器一处书写错误。

Signed-off-by: armink <armink.ztl@gmail.com>
2015-11-09 18:55:59 +08:00 · 2015-11-09 18:55:59 +08:00 · b473707f3e
parent 211d19bd31
commit b473707f3e
1 changed files with 1 additions and 1 deletions
--- a/FreeModbus/modbus/functions/mbfuncholding.c
+++ b/FreeModbus/modbus/functions/mbfuncholding.c
@ -183,7 +183,7 @@ eMBFuncReadHoldingRegister( UCHAR * pucFrame, USHORT * usLen )
        usRegAddress++;

        usRegCount = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_REGCNT_OFF] << 8 );
-        usRegCount = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_REGCNT_OFF + 1] );
+        usRegCount |= ( USHORT )( pucFrame[MB_PDU_FUNC_READ_REGCNT_OFF + 1] );

        /* Check if the number of registers to read is valid. If not
         * return Modbus illegal data value exception.