From 325066149fd03a0cdece9e2fd14d5b12f98d5f2e Mon Sep 17 00:00:00 2001 From: =?utf8?q?J=C3=B6rg=20Wunsch?= Date: Fri, 14 Mar 2014 11:00:54 +0100 Subject: [PATCH] All Atmel-provided CMSIS-DAP devices use 512 byte packet size MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The existing CMSIS-DAP driver matches the USB VID/PID against 0x3eb (Atmel VID) and 0x2111 (Atmel EDBG embedded CMSIS-DAP debugger), and then bumps the packet size from its default of 64 to 512. However, it turned out that *all* Atmel-provided CMSIS-DAP devices (EDBG with PID 0x2111; JTAGICE3 with firmware version 3.x, PID 0x2140; new Atmel-ICE [successor of JTAGICE3], PID 0x2141) require a 512-byte packet size. Obviously, all run the same USB implementation inside their custom microcontroller. Thus, it seems best to simply assume that *all* Atmel CMSIS-DAP devices use this packet size, and don't check the PID at all. This has also been filed as Trac bug #68: https://sourceforge.net/apps/trac/openocd/ticket/68 Change-Id: I942af93060fdf265fca3961841638caa6182f877 Signed-off-by: Jörg Wunsch Reviewed-on: http://openocd.zylin.com/2045 Tested-by: jenkins Reviewed-by: Spencer Oliver Reviewed-by: Andrey Yurovsky --- src/jtag/drivers/cmsis_dap_usb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/jtag/drivers/cmsis_dap_usb.c b/src/jtag/drivers/cmsis_dap_usb.c index 504b3d00..34f8f251 100644 --- a/src/jtag/drivers/cmsis_dap_usb.c +++ b/src/jtag/drivers/cmsis_dap_usb.c @@ -232,7 +232,7 @@ static int cmsis_dap_usb_open(void) int packet_size = PACKET_SIZE; /* atmel cmsis-dap uses 512 byte reports */ - if (target_vid == 0x03eb && target_pid == 0x2111) + if (target_vid == 0x03eb) packet_size = 512 + 1; cmsis_dap_handle->packet_buffer = malloc(packet_size); -- 2.39.5