drivers/sx127x: Move Kconfig and add bitrate options

This commit moves sx127x Kconfig to lpwan/sx127x/ to follow the
same logic used by sx126x and adds the configuration to support
different bitrate (the default 4800 is fine tuned for LORA).

Signed-off-by: Alan C. Assis <acassis@gmail.com>

drivers/wireless/lpwan/Kconfig

@@ -28,76 +28,6 @@ config LPWAN_SX127X
 	---help---
 		This options adds driver support for the Samtech SX127X chip.
 
-if LPWAN_SX127X
+source "drivers/wireless/lpwan/sx127x/Kconfig"
-
-config LPWAN_SX127X_RFFREQ_DEFAULT
-	int "SX127X default RF frequency"
-	default 433000000
-
-config LPWAN_SX127X_SPIFREQ
-	int "SX127X SPI frequency"
-	default 1000000
-	---help---
-		SX127X SPI frequency up to 10MHz
-
-config LPWAN_SX127X_TXPOWER_DEFAULT
-	int "SX127X default TX power"
-	default 14
-
-config LPWAN_SX127X_PREAMBLE_DEFAULT
-	int "SX127X default preamble length"
-	default 8
-
-config LPWAN_SX127X_MODULATION_DEFAULT
-	int "SX127X default modulation scheme"
-	default 3 if LPWAN_SX127X_LORA
-	default 1 if LPWAN_SX127X_FSKOOK
-	range 1 3
-	---help---
-		1 - FSK, 2 - OOK, 3 - LORA
-
-config LPWAN_SX127X_CRCON
-	int "SX127X CRC ON"
-	range 0 1
-	default 0
-
-config LPWAN_SX127X_RXSUPPORT
-	bool "SX127X RX support"
-	default n
-
-if LPWAN_SX127X_RXSUPPORT
-
-config LPWAN_SX127X_RXFIFO_LEN
-	int "SX127X RX FIFO length"
-	default 5
-
-config LPWAN_SX127X_RXFIFO_DATA_LEN
-	int "SX127X RX FIFO data length"
-	default 64
-
-endif #LPWAN_SX127X_RXSUPPORT
-
-config LPWAN_SX127X_TXSUPPORT
-	bool "SX127X TX support"
-	default n
-
-config LPWAN_SX127X_LORA
-	bool "SX127X LORA support"
-	default y
-
-if LPWAN_SX127X_LORA
-
-config LPWAN_SX127X_LORA_IMPHEADER
-	int "SX127X LORA implicit header ON"
-	range 0 1
-	default 0
-
-endif # LPWAN_SX127X_LORA
-
-config LPWAN_SX127X_FSKOOK
-	bool "SX127X FSK/OOK support"
-	default n
-
-endif # WL_SX127X
 
 endif # DRIVERS_LPWAN

drivers/wireless/lpwan/sx127x/Kconfig

@@ -0,0 +1,95 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
+
+if LPWAN_SX127X
+
+config LPWAN_SX127X_RFFREQ_DEFAULT
+	int "SX127X default RF frequency"
+	default 433000000
+
+config LPWAN_SX127X_SPIFREQ
+	int "SX127X SPI frequency"
+	default 1000000
+	---help---
+		SX127X SPI frequency up to 10MHz
+
+config LPWAN_SX127X_TXPOWER_DEFAULT
+	int "SX127X default TX power"
+	default 14
+
+config LPWAN_SX127X_PREAMBLE_DEFAULT
+	int "SX127X default preamble length"
+	default 8
+
+config LPWAN_SX127X_MODULATION_DEFAULT
+	int "SX127X default modulation scheme"
+	default 3 if LPWAN_SX127X_LORA
+	default 1 if LPWAN_SX127X_FSKOOK
+	range 1 3
+	---help---
+		1 - FSK, 2 - OOK, 3 - LORA
+
+config LPWAN_SX127X_CRCON
+	int "SX127X CRC ON"
+	range 0 1
+	default 0
+
+config LPWAN_SX127X_RXSUPPORT
+	bool "SX127X RX support"
+	default n
+
+if LPWAN_SX127X_RXSUPPORT
+
+config LPWAN_SX127X_RXFIFO_LEN
+	int "SX127X RX FIFO length"
+	default 5
+
+config LPWAN_SX127X_RXFIFO_DATA_LEN
+	int "SX127X RX FIFO data length"
+	default 64
+
+endif #LPWAN_SX127X_RXSUPPORT
+
+config LPWAN_SX127X_TXSUPPORT
+	bool "SX127X TX support"
+	default n
+
+config LPWAN_SX127X_LORA
+	bool "SX127X LORA support"
+	default y
+
+if LPWAN_SX127X_LORA
+
+config LPWAN_SX127X_LORA_IMPHEADER
+	int "SX127X LORA implicit header ON"
+	range 0 1
+	default 0
+
+endif # LPWAN_SX127X_LORA
+
+config LPWAN_SX127X_FSKOOK
+	bool "SX127X FSK/OOK support"
+	default n
+
+if LPWAN_SX127X_FSKOOK
+
+choice
+	prompt "SX127X Bitrate"
+	default LPWAN_SX127X_FSKOOK_4800
+
+config LPWAN_SX127X_FSKOOK_4800
+	bool "4800 BPS"
+
+config LPWAN_SX127X_FSKOOK_38400
+	bool "38400 BPS"
+
+config LPWAN_SX127X_FSKOOK_76800
+	bool "76800 BPS"
+
+endchoice
+
+endif # LPWAN_SX127X_FSKOOK
+
+endif # WL_SX127X

drivers/wireless/lpwan/sx127x/sx127x.c

@@ -77,6 +77,8 @@
 
 #define SX127X_FREQ_CALIBRATION       (CONFIG_LPWAN_SX127X_RFFREQ_DEFAULT)
 
+#ifdef CONFIG_LPWAN_SX127X_FSKOOK_4800
+
 /* FSK default frequency deviation is 5kHz */
 
 #define SX127X_FDEV_DEFAULT           (5000)
@@ -90,6 +92,42 @@
 #define SX127X_FSKOOK_RXBW_DEFAULT    FSKOOK_BANDWIDTH_15P6KHZ
 #define SX127X_FSKOOK_AFCBW_DEFAULT   FSKOOK_BANDWIDTH_20P8KHZ
 
+#endif /* CONFIG_LPWAN_SX127X_FSKOOK_4800 */
+
+#ifdef CONFIG_LPWAN_SX127X_FSKOOK_38400
+
+/* FSK frequency deviation for 38400 is 20kHz */
+
+#define SX127X_FDEV_DEFAULT           (20000)
+
+/* FSK/OOK bitrate default */
+
+#define SX127X_FOM_BITRATE_DEFAULT    (38400)
+
+/* FSK/OOK bandwidth for 38400 */
+
+#define SX127X_FSKOOK_RXBW_DEFAULT    FSKOOK_BANDWIDTH_250KHZ
+#define SX127X_FSKOOK_AFCBW_DEFAULT   FSKOOK_BANDWIDTH_250KHZ
+
+#endif /* CONFIG_LPWAN_SX127X_FSKOOK_38400 */
+
+#ifdef CONFIG_LPWAN_SX127X_FSKOOK_76800
+
+/* FSK frequency deviation for 76800 is 75kHz */
+
+#define SX127X_FDEV_DEFAULT           (75000)
+
+/* FSK/OOK bitrate default */
+
+#define SX127X_FOM_BITRATE_DEFAULT    (76800)
+
+/* FSK/OOK bandwidth for 76800 */
+
+#define SX127X_FSKOOK_RXBW_DEFAULT    FSKOOK_BANDWIDTH_250KHZ
+#define SX127X_FSKOOK_AFCBW_DEFAULT   FSKOOK_BANDWIDTH_250KHZ
+
+#endif /* CONFIG_LPWAN_SX127X_FSKOOK_76800 */
+
 /* Default LORA bandwidth */
 
 #define SX127X_LRM_BW_DEFAULT         LORA_BANDWIDTH_7P8KHZ