From 401af50dc081faa421e7caef18fde2beb15632e4 Mon Sep 17 00:00:00 2001
From: Damien George
Date: Wed, 10 Jun 2015 14:25:54 +0100
Subject: stmhal: Add pyb.irq_stats() to get statistics about IRQ calls.

Adds a lot of code, makes IRQs a bit less efficient, but is very useful
for debugging.  Usage: pyb.irq_stats() returns a memory view that can be
read and written, eg:

    list(pyb.irq_stats())
    pyb.irq_stats()[0]
    pyb.irq_stats()[0] = 0

The patch provides general IRQ_ENTER() and IRQ_EXIT() macros that can be
modified to provide further IRQ statistics if desired.
---
 stmhal/modpyb.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'stmhal/modpyb.c')

diff --git a/stmhal/modpyb.c b/stmhal/modpyb.c
index be71f3f80..0f18b04ed 100644
--- a/stmhal/modpyb.c
+++ b/stmhal/modpyb.c
@@ -139,6 +139,9 @@ STATIC const mp_map_elem_t pyb_module_globals_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_wfi), (mp_obj_t)&pyb_wfi_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_disable_irq), (mp_obj_t)&pyb_disable_irq_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_enable_irq), (mp_obj_t)&pyb_enable_irq_obj },
+    #if IRQ_ENABLE_STATS
+    { MP_OBJ_NEW_QSTR(MP_QSTR_irq_stats), (mp_obj_t)&pyb_irq_stats_obj },
+    #endif
 
     { MP_OBJ_NEW_QSTR(MP_QSTR_stop), (mp_obj_t)&machine_sleep_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_standby), (mp_obj_t)&machine_deepsleep_obj },
-- 
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