lpcmanager

Smarteh RS485 bus: Rx timeout changed from 50 ms to 20 ms (slaves answer in approx. 10 ms). Timeout is žset outside while loop because select() decreases timeout gradually.

2017-01-13, bmakuc
bb465ef96b61
Parents ce82f040a277
Children b88edaa644e4
Smarteh RS485 bus: Rx timeout changed from 50 ms to 20 ms (slaves answer in approx. 10 ms). Timeout is žset outside while loop because select() decreases timeout gradually.
1 files changed, 6 insertions(+), 7 deletions(-)
  • +6 -7
    LPCBus/MC9_Devices_decl.c
    • --- a/LPCBus/MC9_Devices_decl.c Tue Dec 13 10:29:07 2016 +0100
    +++ b/LPCBus/MC9_Devices_decl.c Fri Jan 13 15:22:25 2017 +0100
    @@ -460,14 +460,13 @@
    /* Turn to listen mode*/
    RecieveMode();
    - while(count < uartBufSize){
    + FD_ZERO(&set); /* clear the set */
    + FD_SET(UART_fd, &set); /* add our file descriptor to the set */
    - FD_ZERO(&set); /* clear the set */
    - FD_SET(UART_fd, &set); /* add our file descriptor to the set */
    -
    - timeout.tv_sec = 0;
    - timeout.tv_usec = 50000;
    -
    + timeout.tv_sec = 0;
    + timeout.tv_usec = 20000;
    +
    + while(count < uartBufSize){
    rv = select(UART_fd + 1, &set, NULL, NULL, &timeout);
    if(rv == -1)
    printf("RS485 select error\n");