1 files changed, 3 insertions, 2 deletions
diff --git a/gm_platform/fw/serial.h b/gm_platform/fw/serial.h
index 55eac9e..c10393a 100644
--- a/gm_platform/fw/serial.h
+++ b/gm_platform/fw/serial.h
@@ -31,14 +31,15 @@ struct dma_tx_buf {
     size_t xfr_start; /* Start index of running DMA transfer */
     size_t xfr_end; /* End index of running DMA transfer plus one */
     size_t wr_pos; /* Next index to be written */
-    uint8_t data[256];
+    uint8_t data[512];
+    size_t packet_starts[5];
 };
 
 extern volatile struct dma_tx_buf usart_tx_buf;
 
 void usart_dma_init(void);
 int usart_dma_fifo_push(volatile struct dma_tx_buf *buf, char c);
-void usart_putc(char c);
 void usart_send_packet(const uint8_t *data, size_t len);
+int usart_send_packet_nonblocking(const uint8_t *data, size_t len);
 
 #endif // __SERIAL_H__