From 958fb95908f2d8cdf13c02d827f2d14f6011170e Mon Sep 17 00:00:00 2001
From: akuker <34318535+akuker@users.noreply.github.com>
Date: Mon, 20 Dec 2021 12:50:14 -0600
Subject: [PATCH] Adjust bus settle delay to match SCSI standard (#544)

* Move the GCC v10 compiler flags into makefile instead of easyinstall.sh

* #504 - Update the bus settle time to match the SCSI standard

Co-authored-by: RaSCSI User <user@rascsi.com>
---
 easyinstall.sh              |  9 +--------
 src/raspberrypi/Makefile    | 10 ++++++++++
 src/raspberrypi/gpiobus.cpp |  8 ++++----
 src/raspberrypi/gpiobus.h   |  1 -
 4 files changed, 15 insertions(+), 13 deletions(-)

diff --git a/easyinstall.sh b/easyinstall.sh
index f12ad150..4a363222 100755
--- a/easyinstall.sh
+++ b/easyinstall.sh
@@ -83,15 +83,8 @@ function installPackages() {
 function compileRaScsi() {
     cd "$BASE/src/raspberrypi" || exit 1
 
-    # Compiler flags needed for gcc v10 and up
-    if [[ `gcc --version | awk '/gcc/' | awk -F ' ' '{print $3}' | awk -F '.' '{print $1}'` -ge 10 ]]; then
-        echo -n "gcc 10 or later detected. Will compile with the following flags: "
-        COMPILER_FLAGS="-DFMT_HEADER_ONLY"
-        echo $COMPILER_FLAGS
-    fi
-
     echo "Compiling with ${CORES:-1} simultaneous cores..."
-    ( make clean && EXTRA_FLAGS="$COMPILER_FLAGS" make -j "${CORES:-1}" all CONNECT_TYPE="${CONNECT_TYPE:-FULLSPEC}" ) </dev/null
+    ( make clean && make -j "${CORES:-1}" all CONNECT_TYPE="${CONNECT_TYPE:-FULLSPEC}" ) </dev/null
 }
 
 # install the RaSCSI binaries and modify the service configuration
diff --git a/src/raspberrypi/Makefile b/src/raspberrypi/Makefile
index 349f8569..bd0df3d3 100644
--- a/src/raspberrypi/Makefile
+++ b/src/raspberrypi/Makefile
@@ -31,6 +31,16 @@ CXXFLAGS += -std=c++17 -Wno-psabi -iquote . -D_FILE_OFFSET_BITS=64 -MD -MP
 CFLAGS += $(EXTRA_FLAGS)
 CXXFLAGS += $(EXTRA_FLAGS)
 
+# If we're using GCC version 10 or later, we need to add the FMT_HEADER_ONLY definition
+GCCVERSION10 := $(shell expr `gcc -dumpversion` \>= 10)
+
+ifeq "$(GCCVERSION10)" "1"
+	CFLAGS += -DFMT_HEADER_ONLY
+	CXXFLAGS += -DFMT_HEADER_ONLY
+endif
+
+
+
 ##   CONNECT_TYPE=FULLSPEC : Specify the type of RaSCSI board type
 ##              that you are using. The typical options are 
 ##              STANDARD or FULLSPEC. The default is FULLSPEC
diff --git a/src/raspberrypi/gpiobus.cpp b/src/raspberrypi/gpiobus.cpp
index d78c66b1..a931f102 100644
--- a/src/raspberrypi/gpiobus.cpp
+++ b/src/raspberrypi/gpiobus.cpp
@@ -840,7 +840,7 @@ int GPIOBUS::CommandHandShake(BYTE *buf)
 	BOOL ret = WaitSignal(PIN_ACK, TRUE);
 
 	// Wait until the signal line stabilizes
-	SysTimer::SleepNsec(GPIO_DATA_SETTLING);
+	SysTimer::SleepNsec(SCSI_DELAY_BUS_SETTLE_DELAY_NS);
 
 	// Get data
 	*buf = GetDAT();
@@ -874,7 +874,7 @@ int GPIOBUS::CommandHandShake(BYTE *buf)
 		ret = WaitSignal(PIN_ACK, TRUE);
 
 		// Wait until the signal line stabilizes
-		SysTimer::SleepNsec(GPIO_DATA_SETTLING);
+		SysTimer::SleepNsec(SCSI_DELAY_BUS_SETTLE_DELAY_NS);
 
 		// Get data
 		*buf = GetDAT();
@@ -930,7 +930,7 @@ int GPIOBUS::ReceiveHandShake(BYTE *buf, int count)
 			ret = WaitSignal(PIN_ACK, TRUE);
 
 			// Wait until the signal line stabilizes
-			SysTimer::SleepNsec(GPIO_DATA_SETTLING);
+			SysTimer::SleepNsec(SCSI_DELAY_BUS_SETTLE_DELAY_NS);
 
 			// Get data
 			*buf = GetDAT();
@@ -973,7 +973,7 @@ int GPIOBUS::ReceiveHandShake(BYTE *buf, int count)
 			}
 
 			// Wait until the signal line stabilizes
-			SysTimer::SleepNsec(GPIO_DATA_SETTLING);
+			SysTimer::SleepNsec(SCSI_DELAY_BUS_SETTLE_DELAY_NS);
 
 			// Get data
 			*buf = GetDAT();
diff --git a/src/raspberrypi/gpiobus.h b/src/raspberrypi/gpiobus.h
index cc1dcfee..46babdce 100644
--- a/src/raspberrypi/gpiobus.h
+++ b/src/raspberrypi/gpiobus.h
@@ -433,7 +433,6 @@
 //	Constant declarations (bus control timing)
 //
 //---------------------------------------------------------------------------
-#define GPIO_DATA_SETTLING 100			// Data bus stabilization time (ns)
 // SCSI Bus timings taken from:
 //     https://www.staff.uni-mainz.de/tacke/scsi/SCSI2-05.html
 #define SCSI_DELAY_ARBITRATION_DELAY_NS          2400