From d3cd2b71c0092abfaa0799e9dbaf404cd573eced Mon Sep 17 00:00:00 2001
From: Federico Pellegrin <fede@evolware.org>
Date: Sun, 2 Sep 2018 12:44:08 +0200
Subject: [PATCH] sam0_common: fix sercom_id return value for SERCOM5 (#9875)
---
cpu/sam0_common/include/periph_cpu_common.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/cpu/sam0_common/include/periph_cpu_common.h b/cpu/sam0_common/include/periph_cpu_common.h
index e3bb094e5c..ece26bef85 100644
--- a/cpu/sam0_common/include/periph_cpu_common.h
+++ b/cpu/sam0_common/include/periph_cpu_common.h
@@ -299,7 +299,8 @@ static inline int sercom_id(void *sercom)
#if defined(CPU_FAM_SAMD21)
return ((((uint32_t)sercom) >> 10) & 0x7) - 2;
#elif defined(CPU_FAM_SAML21)
- return ((((uint32_t)sercom) >> 10) & 0x7);
+ /* Left side handles SERCOM0-4 while right side handles unaligned address of SERCOM5 */
+ return ((((uint32_t)sercom) >> 10) & 0x7) + ((((uint32_t)sercom) >> 22) & 0x04);
#endif
}
--
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