stlink: add SWO tracing support

[openocd.git] / src / jtag / hla / hla_interface.c

diff --git a/src/jtag/hla/hla_interface.c b/src/jtag/hla/hla_interface.c
index 8faf9221da6d3be08acf4eea1f77724f88083f42..f8b5c61b4fe0d65b0e1e76ffffa8fb140f2d18f3 100644 (file)
--- a/src/jtag/hla/hla_interface.c
+++ b/src/jtag/hla/hla_interface.c
@@ -37,7 +37,7 @@
 
 #include <target/target.h>
 
-static struct hl_interface_s hl_if = { {0, 0, 0, 0, 0, HL_TRANSPORT_UNKNOWN, 0, false}, 0, 0 };
+static struct hl_interface_s hl_if = { {0, 0, 0, 0, 0, HL_TRANSPORT_UNKNOWN, 0, false, NULL, 0}, 0, 0 };
 
 int hl_interface_open(enum hl_transports tr)
 {
@@ -114,6 +114,11 @@ static int hl_interface_quit(void)
 {
        LOG_DEBUG("hl_interface_quit");
 
+       if (hl_if.param.trace_f) {
+               fclose(hl_if.param.trace_f);
+               hl_if.param.trace_f = NULL;
+       }
+
        return ERROR_OK;
 }
 
@@ -220,6 +225,30 @@ COMMAND_HANDLER(stlink_interface_handle_api_command)
        return ERROR_OK;
 }
 
+COMMAND_HANDLER(interface_handle_trace_command)
+{
+       FILE *f;
+       unsigned source_hz;
+
+       if (CMD_ARGC != 2)
+               return ERROR_COMMAND_SYNTAX_ERROR;
+
+       f = fopen(CMD_ARGV[0], "a");
+       if (!f)
+               return ERROR_COMMAND_SYNTAX_ERROR;
+
+       COMMAND_PARSE_NUMBER(uint, CMD_ARGV[1], source_hz);
+       if (source_hz == 0) {
+               fclose(f);
+               return ERROR_COMMAND_SYNTAX_ERROR;
+       }
+
+       hl_if.param.trace_f = f;
+       hl_if.param.trace_source_hz = source_hz;
+
+       return ERROR_OK;
+}
+
 static const struct command_registration hl_interface_command_handlers[] = {
        {
         .name = "hla_device_desc",
@@ -256,6 +285,13 @@ static const struct command_registration hl_interface_command_handlers[] = {
         .help = "set the desired stlink api level",
         .usage = "api version 1 or 2",
         },
+        {
+        .name = "trace",
+        .handler = &interface_handle_trace_command,
+        .mode = COMMAND_CONFIG,
+        .help = "configure trace reception",
+        .usage = "destination_path source_lock_hz",
+        },
        COMMAND_REGISTRATION_DONE
 };