From 39f67c8df2a7115693cab369fec2c8ea907accf2 Mon Sep 17 00:00:00 2001
From: Tester23 <85486843+openshwprojects@users.noreply.github.com>
Date: Sat, 13 Sep 2025 18:35:38 +0200
Subject: [PATCH] Update drv_dmx512.c

---
 src/driver/drv_dmx512.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/driver/drv_dmx512.c b/src/driver/drv_dmx512.c
index 96403155b..2ebd5cadd 100644
--- a/src/driver/drv_dmx512.c
+++ b/src/driver/drv_dmx512.c
@@ -46,6 +46,9 @@ int dmx_pin = 22;
 void HAL_UART_Flush(void);
 void HAL_SetBaud(uint32_t baud);
 void DMX_Show() {
+	if (g_dmxBuffer == 0) {
+		return;
+	}
 	// BREAK: pull TX low manually
 	//HAL_PIN_Setup_Output(dmx_pin);
 	//HAL_PIN_SetOutputValue(dmx_pin, 0);