From 5f6e00d904529a99c5234ddb2ce35a88aaad15f9 Mon Sep 17 00:00:00 2001
From: Mark Haslinghuis <mark@numloq.nl>
Date: Tue, 11 Mar 2025 16:30:13 +0100
Subject: [PATCH] [4.5.2] Fix SA for holybro on AT32F4 (#14246)

* Fix SA on softserial for AT32

* Add another macro

* fix typo
---
 src/main/drivers/at32/serial_uart_at32f43x.c | 9 +++++++++
 src/main/io/vtx_smartaudio.c                 | 8 ++++----
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/src/main/drivers/at32/serial_uart_at32f43x.c b/src/main/drivers/at32/serial_uart_at32f43x.c
index eb06a663d5..bd80e0d259 100644
--- a/src/main/drivers/at32/serial_uart_at32f43x.c
+++ b/src/main/drivers/at32/serial_uart_at32f43x.c
@@ -387,12 +387,21 @@ uartPort_t *serialUART(UARTDevice_e device, uint32_t baudRate, portMode_e mode,
 
     if ((options & SERIAL_BIDIR) && txIO) {
         //mode,speed,otype,pupd
+#ifndef USE_NONCOMPLIANT_SMARTAUDIO
         ioConfig_t ioCfg = IO_CONFIG(
             GPIO_MODE_MUX,
             GPIO_DRIVE_STRENGTH_STRONGER,
             ((options & SERIAL_INVERTED) || (options & SERIAL_BIDIR_PP) || (options & SERIAL_BIDIR_PP_PD)) ? GPIO_OUTPUT_PUSH_PULL : GPIO_OUTPUT_OPEN_DRAIN,
             ((options & SERIAL_INVERTED) || (options & SERIAL_BIDIR_PP_PD)) ? GPIO_PULL_DOWN : GPIO_PULL_UP
         );
+#else
+        ioConfig_t ioCfg = IO_CONFIG(
+            GPIO_MODE_MUX,
+            GPIO_DRIVE_STRENGTH_STRONGER,
+            ((options & SERIAL_INVERTED) || (options & SERIAL_BIDIR_PP) || (options & SERIAL_BIDIR_PP_PD)) ? GPIO_OUTPUT_PUSH_PULL : GPIO_OUTPUT_OPEN_DRAIN,
+            (options & SERIAL_INVERTED) ? GPIO_PULL_DOWN : GPIO_PULL_UP
+        );
+#endif
         IOInit(txIO, OWNER_SERIAL_TX, RESOURCE_INDEX(device));
         IOConfigGPIOAF(txIO, ioCfg, uartdev->tx.af);
     } else {
diff --git a/src/main/io/vtx_smartaudio.c b/src/main/io/vtx_smartaudio.c
index b3c7ff9191..7cab8b8202 100644
--- a/src/main/io/vtx_smartaudio.c
+++ b/src/main/io/vtx_smartaudio.c
@@ -497,7 +497,7 @@ static void saReceiveFrame(uint8_t c)
 static void saSendFrame(uint8_t *buf, int len)
 {
     if (!IS_RC_MODE_ACTIVE(BOXVTXCONTROLDISABLE)) {
-#ifndef AT32F4
+#ifdef USE_NONCOMPLIANT_SMARTAUDIO
         switch (smartAudioSerialPort->identifier) {
         case SERIAL_PORT_SOFTSERIAL1:
         case SERIAL_PORT_SOFTSERIAL2:
@@ -509,14 +509,14 @@ static void saSendFrame(uint8_t *buf, int len)
             serialWrite(smartAudioSerialPort, 0x00); // Generate 1st start byte
             break;
         }
-#endif //AT32F4
+#endif // USE_NONCOMPLIANT_SMARTAUDIO
 
         for (int i = 0 ; i < len ; i++) {
             serialWrite(smartAudioSerialPort, buf[i]);
         }
-        #ifdef USE_AKK_SMARTAUDIO
+#ifdef USE_AKK_SMARTAUDIO
         serialWrite(smartAudioSerialPort, 0x00); // AKK/RDQ SmartAudio devices can expect an extra byte due to manufacturing errors.
-        #endif // USE_AKK_SMARTAUDIO
+#endif // USE_AKK_SMARTAUDIO
 
         saStat.pktsent++;
     } else {