??? 12/28/06 14:10 Read: times |
#130211 - you are right Responding to: ???'s previous message |
dear Ap Charles,
when i said i am using hardware uart for rs 485,it's because the software uart is more complex.and i need to receive and transmit with the rs 485(just like you said,the master initializes the communication).i am using the software uart only for receiving the data fraom the external device.i am using polling for receiving data from the external device and interrupt for rs 485 communication.the data received from the external device will be stored at the memory location and when the master asks each slave for the data, it will transmit the same to the master. sunish |