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-rw-r--r--src/stm/stm32l.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/stm/stm32l.h b/src/stm/stm32l.h
index 39dd710d..b922b6bc 100644
--- a/src/stm/stm32l.h
+++ b/src/stm/stm32l.h
@@ -303,6 +303,9 @@ struct stm_rcc {
extern struct stm_rcc stm_rcc;
+/* Nominal high speed internal oscillator frequency is 16MHz */
+#define STM_HSI_FREQ 16000000
+
#define STM_RCC_CR_RTCPRE (29)
#define STM_RCC_CR_RTCPRE_HSE_DIV_2 0
#define STM_RCC_CR_RTCPRE_HSE_DIV_4 1