Change in simtrace2[master]: dfu: let the device reset itself

[Hoernchen]

Hoernchen has uploaded this change for review. ( https://gerrit.osmocom.org/c/simtrace2/+/22529 )


Change subject: dfu: let the device reset itself
......................................................................

dfu: let the device reset itself

dfu flashing the sam attache to port 1 was easy, but i was never able to
get the sam at port 4 into dfu mode. Changing the firmware so it resets
itself just like the octsim instead of starting a timer and waiting for
a reset form the host made it work every time for me.

Change-Id: Ida636ec925f40d6d56551f170150181350d03bbd
---
M firmware/atmel_softpack_libraries/usb/device/dfu/dfu.h
M firmware/atmel_softpack_libraries/usb/device/dfu/dfu_runtime.c
2 files changed, 7 insertions(+), 4 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/simtrace2 refs/changes/29/22529/1

diff --git a/firmware/atmel_softpack_libraries/usb/device/dfu/dfu.h b/firmware/atmel_softpack_libraries/usb/device/dfu/dfu.h
index 5bd8684..84ce14e 100644
--- a/firmware/atmel_softpack_libraries/usb/device/dfu/dfu.h
+++ b/firmware/atmel_softpack_libraries/usb/device/dfu/dfu.h
@@ -39,8 +39,8 @@
 #define DFU_FUNC_DESC  {						\
 	.bLength		= USB_DT_DFU_SIZE,			\
 	.bDescriptorType	= USB_DT_DFU,				\
-	.bmAttributes		= USB_DFU_CAN_UPLOAD | USB_DFU_CAN_DOWNLOAD, \
-	.wDetachTimeOut		= 0xff00,				\
+	.bmAttributes		= USB_DFU_CAN_UPLOAD | USB_DFU_CAN_DOWNLOAD | USB_DFU_WILL_DETACH, \
+	.wDetachTimeOut		= 0x00,				\
 	.wTransferSize		= BOARD_DFU_PAGE_SIZE,			\
 	.bcdDFUVersion		= 0x0100,				\
 }
diff --git a/firmware/atmel_softpack_libraries/usb/device/dfu/dfu_runtime.c b/firmware/atmel_softpack_libraries/usb/device/dfu/dfu_runtime.c
index 4467cc9..f2cf64c 100644
--- a/firmware/atmel_softpack_libraries/usb/device/dfu/dfu_runtime.c
+++ b/firmware/atmel_softpack_libraries/usb/device/dfu/dfu_runtime.c
@@ -165,6 +165,8 @@
 			 * will then trigger DFURT_SwitchToDFU() below */
 			TRACE_DEBUG("\r\n====dfu_detach\n\r");
 			g_dfu->state = DFU_STATE_appDETACH;
+			USBD_Write(0, 0, 0, 0, 0);
+			DFURT_SwitchToDFU();
 			ret = DFU_RET_ZLP;
 			goto out;
 			break;
@@ -209,13 +211,14 @@
 
 void DFURT_SwitchToDFU(void)
 {
+	__disable_irq();
+
 	/* store the magic value that the DFU loader can detect and
 	 * activate itself, rather than boot into the application */
 	g_dfu->magic = USB_DFU_MAGIC;
-
+	__DMB();
 	/* Disconnect the USB by removing the pull-up */
 	USBD_Disconnect();
-	__disable_irq();
 
 	/* reset the processor, we will start execution with the
 	 * ResetVector of the bootloader */

-- 
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Gerrit-Project: simtrace2
Gerrit-Branch: master
Gerrit-Change-Id: Ida636ec925f40d6d56551f170150181350d03bbd
Gerrit-Change-Number: 22529
Gerrit-PatchSet: 1
Gerrit-Owner: Hoernchen <ewild at sysmocom.de>
Gerrit-MessageType: newchange
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