From 34e43c7ee9700249dc6e5b333b7c264d45d6b530 Mon Sep 17 00:00:00 2001
From: Damien George
Date: Mon, 25 Aug 2014 18:12:44 +0100
Subject: stmhal: Improve efficiency of SysTick IRQ and HAL_Delay.

SysTick IRQ now increases millisecond counter directly (ie without
calling HAL_IncTick).  Provide our own version of HAL_Delay that does a
wfi while waiting.  This more than halves power consumption when running
a loop containing a pyb.delay call.  It used to be like this, but new
version of HAL library regressed this feature.
---
 stmhal/hal/src/stm32f4xx_hal.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'stmhal/hal')

diff --git a/stmhal/hal/src/stm32f4xx_hal.c b/stmhal/hal/src/stm32f4xx_hal.c
index 6c076c358..0040658a0 100644
--- a/stmhal/hal/src/stm32f4xx_hal.c
+++ b/stmhal/hal/src/stm32f4xx_hal.c
@@ -93,7 +93,7 @@
 #define CMPCR_CMP_PD_BB           (PERIPH_BB_BASE + (CMPCR_OFFSET * 32) + (CMP_PD_BitNumber * 4))
 /* Private macro -------------------------------------------------------------*/
 /* Private variables ---------------------------------------------------------*/
-static __IO uint32_t uwTick;
+__IO uint32_t uwTick;
 
 /* Private function prototypes -----------------------------------------------*/
 /* Private functions ---------------------------------------------------------*/
-- 
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