[beken-72xx] Initialize UART to fix deep sleep

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);
 

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();
 }

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);