From 8034342c5483d3aa0de749db8255f9def9335faa Mon Sep 17 00:00:00 2001
From: Juergen Fitschen <me@jue.yt>
Date: Thu, 12 Mar 2020 18:14:23 +0100
Subject: [PATCH] boards/samr30-xpro: add function to configure antenna switch

---
 boards/samr30-xpro/board.c         | 18 ++++++++++++++++++
 boards/samr30-xpro/include/board.h | 30 ++++++++++++++++++++++++++++++
 2 files changed, 48 insertions(+)

diff --git a/boards/samr30-xpro/board.c b/boards/samr30-xpro/board.c
index ba59777695..e27a081147 100644
--- a/boards/samr30-xpro/board.c
+++ b/boards/samr30-xpro/board.c
@@ -28,6 +28,18 @@
 
 void led_init(void);
 
+void board_antenna_config(uint8_t antenna)
+{
+    if (antenna == RFCTL_ANTENNA_EXT){
+        gpio_clear(RFCTL1_PIN);
+        gpio_set(RFCTL2_PIN);
+    }
+    else if (antenna == RFCTL_ANTENNA_BOARD){
+        gpio_set(RFCTL1_PIN);
+        gpio_clear(RFCTL2_PIN);
+    }
+}
+
 void board_init(void)
 {
     /* initialize the CPU */
@@ -35,6 +47,12 @@ void board_init(void)
 
     /* initialize the boards LEDs */
     led_init();
+
+    /* initialize the on-board antenna switch */
+    gpio_init(RFCTL1_PIN, GPIO_OUT);
+    gpio_init(RFCTL2_PIN, GPIO_OUT);
+    /* set default antenna switch configuration */
+    board_antenna_config(RFCTL_ANTENNA_DEFAULT);
 }
 
 
diff --git a/boards/samr30-xpro/include/board.h b/boards/samr30-xpro/include/board.h
index d6eb0fc9aa..3d1535ab4e 100644
--- a/boards/samr30-xpro/include/board.h
+++ b/boards/samr30-xpro/include/board.h
@@ -67,11 +67,41 @@ extern "C" {
 #define BTN0_MODE                   GPIO_IN_PU
 /** @} */
 
+/**
+ * @name    Antenna configuration pin interface
+ * @{
+ */
+#define RFCTL1_PIN                  GPIO_PIN(PA, 9)
+#define RFCTL2_PIN                  GPIO_PIN(PA, 12)
+/** @} */
+
+/**
+ * @brief   Antenna configuration values
+ */
+enum {
+    RFCTL_ANTENNA_BOARD,
+    RFCTL_ANTENNA_EXT,
+};
+
+/**
+ * @name    Default antenna configuration
+ * @{
+ */
+#ifndef RFCTL_ANTENNA_DEFAULT
+#define RFCTL_ANTENNA_DEFAULT      RFCTL_ANTENNA_BOARD
+#endif
+/** @} */
+
 /**
  * @brief   Initialize board specific hardware, including clock, LEDs and std-IO
  */
 void board_init(void);
 
+/**
+ * @brief   Set antenna switch
+ */
+void board_antenna_config(uint8_t antenna);
+
 #ifdef __cplusplus
 }
 #endif