From 4de46de3cfedb1cfd6bdc3e70a66234a94020e48 Mon Sep 17 00:00:00 2001
From: Matthias Wirth <matthias.wirth@gmail.com>
Date: Mon, 16 Sep 2024 13:13:04 +0200
Subject: [PATCH] make modesbeast read nonblocking

this time for real hopefully
---
 sdr_beast.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/sdr_beast.c b/sdr_beast.c
index 94111a0d..2893f7d8 100644
--- a/sdr_beast.c
+++ b/sdr_beast.c
@@ -137,6 +137,7 @@ bool beastOpen(void) {
     speed_t baud = B3000000;
 
     int flags = O_RDWR | O_NOCTTY;
+    //flags |= O_NONBLOCK;
     Modes.beast_fd = open(Modes.beast_serial, flags);
     if (Modes.beast_fd < 0) {
         fprintf(stderr, "Failed to open serial device %s: %s\n",
@@ -154,8 +155,9 @@ bool beastOpen(void) {
     tios.c_oflag = 0;
     tios.c_lflag = 0;
     tios.c_cflag = CS8 | CRTSCTS;
-    tios.c_cc[VMIN] = 11; // read returns when a minimum of 11 characters are available
-    tios.c_cc[VTIME] = 1; // 100 ms timeout for reads
+    //tios.c_cc[VMIN] = 11; // read returns when a minimum of 11 characters are available
+    tios.c_cc[VMIN] = 0; // polling read with vtime 0
+    tios.c_cc[VTIME] = 0;
 
     if (Modes.sdr_type == SDR_GNS) {
         baud = B921600;