firmware: Minimal frame encodingHEADmain

This only covers the correct frame size, setting the buffer to 0 and
copy the payload over.

Missing is:

- copy destination address
- copy source address
- set frame type
- calculate and add CRC32 checksum

1 files changed, 9 insertions, 1 deletions

diff --git a/firmware/src/main.c b/firmware/src/main.c
index e18cc77..8b31505 100644
--- a/firmware/src/main.c
+++ b/firmware/src/main.c
@@ -1,4 +1,5 @@
 #include <stdbool.h>
+#include <sys/types.h>
 
 #include <zephyr/device.h>
 #include <zephyr/drivers/uart.h>
@@ -24,10 +25,17 @@ int main(void)
 	}
 
 	uint8_t payload[] = {0xDE, DL_SLIP_END, DL_SLIP_ESC, 0xAD};
+	uint8_t frame[DL_MAX_FRAME_SIZE];
+
+	ssize_t flen = dl_encode_frame(payload, ARRAY_SIZE(payload), frame);
+	if (flen < 0) {
+		printk("Failed to encode frame");
+		return 0;
+	}
 
 	while (true) {
 		k_sleep(K_MSEC(1000));
-		dl_send_frame(uart_dev, payload, ARRAY_SIZE(payload));
+		dl_send_frame(uart_dev, frame, flen);
 	}
 
 	return 0;