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-rw-r--r--src/stm/ao_arch.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/stm/ao_arch.h b/src/stm/ao_arch.h
index 007f7e2e..27a942f2 100644
--- a/src/stm/ao_arch.h
+++ b/src/stm/ao_arch.h
@@ -99,6 +99,7 @@ extern const uint32_t ao_radio_cal;
#define AO_HCLK (AO_SYSCLK / AO_AHB_PRESCALER)
#define AO_PCLK1 (AO_HCLK / AO_APB1_PRESCALER)
#define AO_PCLK2 (AO_HCLK / AO_APB2_PRESCALER)
+#define AO_SYSTICK (AO_HCLK / 8)
#if AO_APB1_PRESCALER == 1
#define AO_TIM23467_CLK AO_PCLK1