From 27393e47c3162e42f516b7b5d47d26fe06b4bb56 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kuba=20Szczodrzy=C5=84ski?= <kuba@szczodrzynski.pl>
Date: Wed, 23 Aug 2023 16:06:01 +0200
Subject: [PATCH] [beken-72xx] Initialize UART to fix deep sleep

---
 cores/beken-72xx/arduino/libraries/Serial/Serial.cpp | 4 ++++
 cores/beken-72xx/base/api/lt_init.c                  | 5 +++++
 cores/common/base/api/lt_sleep.h                     | 2 +-
 3 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/cores/beken-72xx/arduino/libraries/Serial/Serial.cpp b/cores/beken-72xx/arduino/libraries/Serial/Serial.cpp
index c4a071d..0aafcb9 100644
--- a/cores/beken-72xx/arduino/libraries/Serial/Serial.cpp
+++ b/cores/beken-72xx/arduino/libraries/Serial/Serial.cpp
@@ -47,6 +47,10 @@ void SerialClass::configure(unsigned long baudrate, uint16_t config) {
 		.flow_control = FLOW_CTRL_DISABLED,
 	};
 
+	if (port == 1)
+		uart1_init();
+	else if (port == 2)
+		uart2_init();
 	uart_hw_set_change(port, &cfg);
 	uart_rx_callback_set(port, callback, &BUF);
 
diff --git a/cores/beken-72xx/base/api/lt_init.c b/cores/beken-72xx/base/api/lt_init.c
index 05d28b1..2064d73 100644
--- a/cores/beken-72xx/base/api/lt_init.c
+++ b/cores/beken-72xx/base/api/lt_init.c
@@ -6,4 +6,9 @@
 void lt_init_family() {
 	// set default UART output port
 	uart_print_port = LT_UART_DEFAULT_PORT - 1;
+	// initialize the UART (needed e.g. after deep sleep)
+	if (uart_print_port == 1)
+		uart1_init();
+	else if (uart_print_port == 2)
+		uart2_init();
 }
diff --git a/cores/common/base/api/lt_sleep.h b/cores/common/base/api/lt_sleep.h
index 7c03bdf..2ccf0aa 100644
--- a/cores/common/base/api/lt_sleep.h
+++ b/cores/common/base/api/lt_sleep.h
@@ -21,7 +21,7 @@ void lt_deep_sleep_unset_gpio(uint32_t gpio_index_map);
 
 /**
  * @brief Set a sleep timer to wake up the device
- * @param sleep_duration the time in seconds to sleep
+ * @param sleep_duration the time in milliseconds to sleep
  */
 void lt_deep_sleep_config_timer(uint32_t sleep_duration);