From 5b7fd20fea6d4329bb3ab45f63df41f46f242688 Mon Sep 17 00:00:00 2001
From: Dave Hylands
Date: Tue, 1 Jul 2014 23:46:53 -0700
Subject: Add support for storing args during an exception raised by an irq.

The user code should call micropython.alloc_emergency_exception_buf(size)
where size is the size of the buffer used to print the argument
passed to the exception.

With the test code from #732, and a call to
micropython.alloc_emergenncy_exception_buf(100) the following error is
now printed:
```python
>>> import heartbeat_irq
Uncaught exception in Timer(4) interrupt handler
Traceback (most recent call last):
  File "0://heartbeat_irq.py", line 14, in heartbeat_cb
NameError: name 'led' is not defined
```
---
 unix/mpconfigport.h | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'unix/mpconfigport.h')

diff --git a/unix/mpconfigport.h b/unix/mpconfigport.h
index ce4365d36..ff30eec34 100644
--- a/unix/mpconfigport.h
+++ b/unix/mpconfigport.h
@@ -64,6 +64,9 @@
 #define MICROPY_GCREGS_SETJMP       (0)
 #endif
 
+#define MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF   (1)
+#define MICROPY_EMERGENCY_EXCEPTION_BUF_SIZE  (128)
+
 extern const struct _mp_obj_module_t mp_module_os;
 extern const struct _mp_obj_module_t mp_module_time;
 extern const struct _mp_obj_module_t mp_module_socket;
-- 
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