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-rw-r--r--src/samd21/internal.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/src/samd21/internal.h b/src/samd21/internal.h
index 34c74815..b03fae30 100644
--- a/src/samd21/internal.h
+++ b/src/samd21/internal.h
@@ -4,7 +4,11 @@
#include <stdint.h> // uint32_t
+#define GPIO(PORT, NUM) (((PORT)-'A') * 32 + (NUM))
+#define GPIO2PORT(PIN) ((PIN) / 32)
+#define GPIO2BIT(PIN) (1<<((PIN) % 32))
+
void enable_pclock(uint32_t clock_id, uint32_t pmask);
-void gpio_peripheral(char bank, uint32_t bit, char ptype, uint32_t pull_up);
+void gpio_peripheral(uint32_t gpio, char ptype, uint32_t pull_up);
#endif // internal.h