diff options
Diffstat (limited to 'firmware')
| -rw-r--r-- | firmware/microblaze/apps/txrx_uhd.c | 3 | ||||
| -rw-r--r-- | firmware/microblaze/lib/hal_uart.c | 7 | ||||
| -rw-r--r-- | firmware/microblaze/lib/hal_uart.h | 1 |
3 files changed, 11 insertions, 0 deletions
diff --git a/firmware/microblaze/apps/txrx_uhd.c b/firmware/microblaze/apps/txrx_uhd.c index 2065830ff..9fe17e262 100644 --- a/firmware/microblaze/apps/txrx_uhd.c +++ b/firmware/microblaze/apps/txrx_uhd.c @@ -324,6 +324,9 @@ void handle_udp_ctrl_packet( case USRP2_CTRL_ID_HEY_WRITE_THIS_UART_FOR_ME_BRO:{ int num_bytes = ctrl_data_in->data.uart_args.bytes; if(num_bytes > 20) num_bytes = 20; + //before we write to the UART, we flush the receive buffer + //this assumes that we're interested in the reply + hal_uart_rx_flush(ctrl_data_in->data.uart_args.dev); fnputstr(ctrl_data_in->data.uart_args.dev, (char *) ctrl_data_in->data.uart_args.data, num_bytes); ctrl_data_out.id = USRP2_CTRL_ID_MAN_I_TOTALLY_WROTE_THAT_UART_DUDE; ctrl_data_out.data.uart_args.bytes = num_bytes; diff --git a/firmware/microblaze/lib/hal_uart.c b/firmware/microblaze/lib/hal_uart.c index a8344daf5..8f7f83a68 100644 --- a/firmware/microblaze/lib/hal_uart.c +++ b/firmware/microblaze/lib/hal_uart.c @@ -101,3 +101,10 @@ hal_uart_getc(hal_uart_name_t u) return uart_regs[u].rxchar; } +int hal_uart_rx_flush(hal_uart_name_t u) +{ + char x; + while(uart_regs[u].rxlevel) x = uart_regs[u].rxchar; + return x; +} + diff --git a/firmware/microblaze/lib/hal_uart.h b/firmware/microblaze/lib/hal_uart.h index 81f4a6777..051dffe92 100644 --- a/firmware/microblaze/lib/hal_uart.h +++ b/firmware/microblaze/lib/hal_uart.h @@ -82,5 +82,6 @@ void hal_uart_putc_nowait(hal_uart_name_t u, int ch); */ int hal_uart_getc(hal_uart_name_t u); +int hal_uart_rx_flush(hal_uart_name_t u); #endif /* INCLUDED_HAL_UART_H */ |