From d01b2cfc0e25e6d64f8d7a2d764c2620e0d9d71f Mon Sep 17 00:00:00 2001
From: Andrew Leech <andrew@alelec.net>
Date: Tue, 7 May 2024 20:17:48 +1000
Subject: Add option to make CDC TX buffer persistent.

---
 src/class/cdc/cdc_device.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src/class/cdc/cdc_device.c')

diff --git a/src/class/cdc/cdc_device.c b/src/class/cdc/cdc_device.c
index 2e0a0c30d..f36725eba 100644
--- a/src/class/cdc/cdc_device.c
+++ b/src/class/cdc/cdc_device.c
@@ -295,7 +295,9 @@ void cdcd_reset(uint8_t rhport)
 
     tu_memclr(p_cdc, ITF_MEM_RESET_SIZE);
     tu_fifo_clear(&p_cdc->rx_ff);
+    #if !CFG_TUD_CDC_PERSISTENT_TX_BUFF
     tu_fifo_clear(&p_cdc->tx_ff);
+    #endif
     tu_fifo_set_overwritable(&p_cdc->tx_ff, true);
   }
 }
-- 
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