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- Log -----------------------------------------------------------------
commit 910f91df523a433891efc3ffd7c95853a45d08e2
Author: Tchan0 <617...@us...>
Date: Thu Aug 17 22:24:56 2023 +0200
Add baudrate 230400 and its speedhack. (#16)
* Add baudrate 230400 and its speedhack.
* Update dc-tool.c
cleaned up explanation about speedhack
-----------------------------------------------------------------------
Summary of changes:
Makefile.cfg | 2 +-
host-src/tool/Makefile | 2 +-
host-src/tool/dc-tool.c | 16 ++++++++++++----
3 files changed, 14 insertions(+), 6 deletions(-)
diff --git a/Makefile.cfg b/Makefile.cfg
index 56bc457..01da995 100644
--- a/Makefile.cfg
+++ b/Makefile.cfg
@@ -98,7 +98,7 @@ endif
# default speed for dc-tool - after initial connection is established, connection
# speed will change to this value, same as using the -b argument
-# value must be one of 9600, 19200, 38400, 57600, 115200, 500000, or 1500000
+# value must be one of 9600, 19200, 38400, 57600, 115200, 230400, 500000, or 1500000
TOOL_DEFAULT_SPEED = 57600
# USB-based serial devices can potentially achieve speeds of 500000 or 1500000 baud
#TOOL_DEFAULT_SPEED = 500000
diff --git a/host-src/tool/Makefile b/host-src/tool/Makefile
index 75eb877..5a206e8 100644
--- a/host-src/tool/Makefile
+++ b/host-src/tool/Makefile
@@ -3,7 +3,7 @@ include ../../Makefile.cfg
LZOPATH = ../../minilzo-2.10
CC = $(HOSTCC)
-CFLAGS = $(HOSTCFLAGS) -DDCLOAD_VERSION=\"$(VERSION)\" -DDEFAULT_SPEED=$(TOOL_DEFAULT_SPEED) -DSERIALDEVICE="\"$(SERIALDEVICE)\"" -DHAVE_GETOPT -DB1500000 -DB500000
+CFLAGS = $(HOSTCFLAGS) -DDCLOAD_VERSION=\"$(VERSION)\" -DDEFAULT_SPEED=$(TOOL_DEFAULT_SPEED) -DSERIALDEVICE="\"$(SERIALDEVICE)\"" -DHAVE_GETOPT -DB1500000 -DB500000 -DB230400
LDFLAGS = $(HOSTLDFLAGS)
INCLUDE = -I$(LZOPATH) -I/usr/local/include
diff --git a/host-src/tool/dc-tool.c b/host-src/tool/dc-tool.c
index ff3e047..fbface1 100644
--- a/host-src/tool/dc-tool.c
+++ b/host-src/tool/dc-tool.c
@@ -546,6 +546,11 @@ int open_serial(char *devicename, unsigned int speed, unsigned int *speedtest) {
case 500000:
speedsel = B500000;
break;
+#endif
+#ifdef B230400
+ case 230400:
+ speedsel = B230400;
+ break;
#endif
case 115200:
speedsel = B115200;
@@ -660,8 +665,9 @@ void close_serial(void) {
}
int speedhack = 0;
-/* speedhack controls whether dcload will use N=12 (normal, 4.3% error) or
- * N=13 (alternate, -3.1% error) for 115200
+/* speedhack controls whether dcload will use
+ * - N=13 (alternate, -3.0% error) instead of N=12 (normal, 4.3% error) for 115200
+ * - N=6 (alternate, -2.8% error) instead of N=5 (normal, 11.5% error) for 230400
*/
/* use_extclk controls whether the DC's serial port will use an external clock */
@@ -677,6 +683,8 @@ int change_speed(char *device_name, unsigned int speed) {
if(speedhack && (speed == 115200))
send_uint(111600); /* get dcload to pick N=13 rather than N=12 */
+ else if(speedhack && (speed == 230400))
+ send_uint(223214); /* get dcload to pick N=6 rather than N=5 */
else if(use_extclk)
send_uint(0);
else
@@ -744,7 +752,7 @@ void usage(void) {
printf("-s <size> Set size to <size>\n");
printf("-t <device> Use <device> to communicate with dc (default: %s)\n", SERIALDEVICE);
printf("-b <baudrate> Use <baudrate> (default: %d)\n", DEFAULT_SPEED);
- printf("-e Try alternate 115200 (must also use -b 115200)\n");
+ printf("-e Try alternate 115200/230400 (must also use -b 115200 or -b 230400)\n");
printf("-E Use an external clock for the DC's serial port\n");
printf("-n Do not attach console and fileserver\n");
printf("-p Use dumb terminal rather than console/fileserver\n");
@@ -1279,7 +1287,7 @@ int main(int argc, char *argv[]) {
printf("Cdfs redirection enabled\n");
if(speedhack)
- printf("Alternate 115200 enabled\n");
+ printf("Alternate 115200/230400 enabled\n");
if(use_extclk)
printf("External clock usage enabled\n");
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