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-rw-r--r--src/packet_interface.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/packet_interface.h b/src/packet_interface.h
index 4d1be07..86afb0e 100644
--- a/src/packet_interface.h
+++ b/src/packet_interface.h
@@ -46,6 +46,13 @@ struct control_packet {
} __attribute__((__packed__));
+/*@
+ requires \valid(f);
+ requires \valid_read(data + (0..len-1));
+ requires len > 0;
+
+ assigns \nothing;
+ */
void send_packet(struct dma_usart_file *f, const uint8_t *data, size_t len);
#endif