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-rw-r--r--libmaple/util.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/libmaple/util.h b/libmaple/util.h
index 64782d9..63427cc 100644
--- a/libmaple/util.h
+++ b/libmaple/util.h
@@ -44,7 +44,8 @@
/* Convert SRAM address */
#define BITBAND_SRAM(a,b) ((BITBAND_SRAM_BASE+(a-BITBAND_SRAM_REF)*32+(b*4)))
/* Convert PERI address */
-#define BITBAND_PERI(a,b) ((BITBAND_PERI_BASE+(a-BITBAND_PERI_REF)*32+(b*4)))
+#define BITBAND_PERI(a, b) ((BITBAND_PERI_BASE + \
+ ((uint32)a - BITBAND_PERI_REF) * 32 + (b * 4)))
#define REG_SET(reg, val) (*(volatile uint32*)(reg) = (val))
#define REG_SET_BIT(reg, bit) (*(volatile uint32*)(reg) |= BIT(bit))