From c5563bd5d07d87f106287e158dcf3ee46fa036a6 Mon Sep 17 00:00:00 2001
From: Erik Olof Gunnar Andersson <me@eandersson.net>
Date: Fri, 8 Nov 2024 23:19:29 +0100
Subject: [PATCH] Serial fix suggested by Mecanix

---
 components/asic/serial.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/components/asic/serial.c b/components/asic/serial.c
index 814f72ccc..c37c5a3a6 100644
--- a/components/asic/serial.c
+++ b/components/asic/serial.c
@@ -51,6 +51,8 @@ void SERIAL_set_baud(int baud)
 
 int SERIAL_send(uint8_t *data, int len, bool debug)
 {
+    int written = uart_write_bytes(UART_NUM_1, (const char *)data, len);
+    uart_wait_tx_done(UART_NUM_1, portMAX_DELAY);
     if (debug)
     {
         printf("tx: ");
@@ -58,7 +60,7 @@ int SERIAL_send(uint8_t *data, int len, bool debug)
         printf("\n");
     }
 
-    return uart_write_bytes(UART_NUM_1, (const char *)data, len);
+    return written;
 }
 
 /// @brief waits for a serial response from the device