From 41cd3d71d5e6039c35bc58ec3dd9f52994f31847 Mon Sep 17 00:00:00 2001
From: Pavol Rusnak <stick@gk2.sk>
Date: Sat, 19 Nov 2016 15:30:46 +0100
Subject: [PATCH] trezor.utils.halt: print error message passed as argument

---
 extmod/modtrezorutils/modtrezorutils.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/extmod/modtrezorutils/modtrezorutils.c b/extmod/modtrezorutils/modtrezorutils.c
index 3fb342f43..2991b0999 100644
--- a/extmod/modtrezorutils/modtrezorutils.c
+++ b/extmod/modtrezorutils/modtrezorutils.c
@@ -61,6 +61,12 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_TrezorUtils_memcpy_obj, 5, 5, mod
 ///     Halts execution
 ///     '''
 STATIC mp_obj_t mod_TrezorUtils_halt(size_t n_args, const mp_obj_t *args) {
+    mp_buffer_info_t msg;
+    if (n_args > 0 && mp_get_buffer(args[0], &msg, MP_BUFFER_READ)) {
+        printf("HALT! %s\n", (const char *)msg.buf);
+    } else {
+        printf("HALT!\n");
+    }
     // TODO: is this the best we can do?
 #if defined STM32_HAL_H
     // loop forever