From 5e58eccd5a86f1371d7012322e726228bfc250cc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ga=C3=ABtan=20Harter?= <gaetan.harter@fu-berlin.de>
Date: Tue, 26 Feb 2019 16:08:20 +0100
Subject: [PATCH] boards/stm32f3discovery: Fix no external low speed crystal
The board does not have external low speed crystal.
Page 20 of User Manual: 6.10.2 "OSC 32 kHz clock supply"
* X3 Crystal (not provided)
https://www.st.com/resource/en/user_manual/dm00063382.pdf
This fixes `example/default` and makes `tests/periph_rtc` work properly.
---
boards/stm32f3discovery/include/periph_conf.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/boards/stm32f3discovery/include/periph_conf.h b/boards/stm32f3discovery/include/periph_conf.h
index 79bd8cad5b..bf7105bac9 100644
--- a/boards/stm32f3discovery/include/periph_conf.h
+++ b/boards/stm32f3discovery/include/periph_conf.h
@@ -40,7 +40,7 @@ extern "C" {
#define CLOCK_HSE (8000000U)
/* 0: no external low speed crystal available,
* 1: external crystal available (always 32.768kHz) */
-#define CLOCK_LSE (1)
+#define CLOCK_LSE (0)
/* peripheral clock setup */
#define CLOCK_AHB_DIV RCC_CFGR_HPRE_DIV1
#define CLOCK_AHB (CLOCK_CORECLOCK / 1)
--
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