From d798fae20b1cd87396ea884de737aa7f3e359193 Mon Sep 17 00:00:00 2001 From: Kevin O'Connor Date: Mon, 28 May 2018 09:42:59 -0400 Subject: serialqueue: Limit message transmission to available receive buffer size If the mcu is using a traditional serial port, then only send a new message block if there is space available in the mcu receive buffer. This should make it significantly less likely that high load on the mcu will result in retransmits. Signed-off-by: Kevin O'Connor --- src/generic/serial_irq.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'src/generic/serial_irq.c') diff --git a/src/generic/serial_irq.c b/src/generic/serial_irq.c index a035364b..76304323 100644 --- a/src/generic/serial_irq.c +++ b/src/generic/serial_irq.c @@ -14,10 +14,13 @@ #include "sched.h" // sched_wake_tasks #include "serial_irq.h" // serial_enable_tx_irq -static uint8_t receive_buf[192], receive_pos; +#define RX_BUFFER_SIZE 192 + +static uint8_t receive_buf[RX_BUFFER_SIZE], receive_pos; static uint8_t transmit_buf[96], transmit_pos, transmit_max; DECL_CONSTANT(SERIAL_BAUD, CONFIG_SERIAL_BAUD); +DECL_CONSTANT(RECEIVE_WINDOW, RX_BUFFER_SIZE); // Rx interrupt - store read data void -- cgit v1.2.3-70-g09d2