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-rw-r--r--wirish/include/wirish/boards.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/wirish/include/wirish/boards.h b/wirish/include/wirish/boards.h
index 1375512..73d5509 100644
--- a/wirish/include/wirish/boards.h
+++ b/wirish/include/wirish/boards.h
@@ -113,6 +113,9 @@ bool boardUsesPin(uint8 pin);
/* Set derived definitions */
#define CLOCK_SPEED_MHZ CYCLES_PER_MICROSECOND
#define CLOCK_SPEED_HZ (CLOCK_SPEED_MHZ * 1000000UL)
+#ifndef SYSTICK_RELOAD_VAL
+#define SYSTICK_RELOAD_VAL (1000 * CYCLES_PER_MICROSECOND - 1)
+#endif
/**
* @brief Does the board break out a USART/UART's RX and TX pins?