I would like to know if is possible to connect a ZWORLD device (such as PK2200) based on ZILOG Z180 and a self made 8051 based board on RS485 network, using the nine bit protocol: the PK2200 should be the master and the 8051 slaves. In the serial interrupt routine i would check the address received (this is the first byte in the data packet). If address (nine bit) == own_module_address, then the called 8051 receive the data into the input buffer and do some actions.
- But am i sure that the data stream (8 bit) send from PK2200 or from the called 8051 will be ignored (without interrupt request) from the other slave ?
Another question:
- may i obtain the same result using MODBUS protocol, or am i forced to process (interrupt request) every byte of the data stream between master and slave, even by other slave not called in that moment ?
- Does anyone have a pseudo code for the crc calculated from DYNAMIC C when it send data stream by "sendOpto22" instruction ?
Thanks in advance.