This is an automated email from Gerrit. Tomas Vanek ([email protected]) just uploaded a new patch set to Gerrit, which you can find at http://openocd.zylin.com/3098
-- gerrit commit 612579687e1eab77405211dc71dde951f533ec1d Author: Tomas Vanek <[email protected]> Date: Thu Nov 5 21:05:43 2015 +0100 jtag: cmsis-dap: Issue disconnect before reconnecting cmsis-dap protocol has both DAP_Connect and DAP_Disconnect commands. Logically if cmsis_dap_swd_switch_seq() calls DAP_Connect in connected state it should call DAP_Disconnect first. Doing so surprisingly solves problems on Atmel EDBG with target SAMD/R/L/C. Without this change SWD communication breaks after reset run/halt in config "reset_config srst_only" and reconnect trials repeatedly fail with "SWD ack not OK: 0 JUNK" Change-Id: Ie951098d5e0c83f388e2df414608aaabec2135c9 Signed-off-by: Tomas Vanek <[email protected]> diff --git a/src/jtag/drivers/cmsis_dap_usb.c b/src/jtag/drivers/cmsis_dap_usb.c index 38828ea..b3b9143 100644 --- a/src/jtag/drivers/cmsis_dap_usb.c +++ b/src/jtag/drivers/cmsis_dap_usb.c @@ -714,6 +714,9 @@ static int cmsis_dap_swd_switch_seq(struct adiv5_dap *dap, enum swd_special_seq unsigned int s_len; int retval; + /* First disconnect before connecting, Atmel EDBG needs it for SAMD/R/L/C */ + cmsis_dap_cmd_DAP_Disconnect(); + /* When we are reconnecting, DAP_Connect needs to be rerun, at * least on Keil ULINK-ME */ retval = cmsis_dap_cmd_DAP_Connect(seq == LINE_RESET || seq == JTAG_TO_SWD ? -- ------------------------------------------------------------------------------ _______________________________________________ OpenOCD-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/openocd-devel
