WM1110 SDK kit enter serial DFU and add deployment packages (#4266)

* Switch default upload protocol to nrfutil so that pio generates zip deploy packages

* Enter serial DFU on SDK board

* Remove guard for DFU zip from SDK build

* NRF_USE_SERIAL_DFU macro instead

bin/build-nrf52.sh

@@ -25,13 +25,9 @@ pio run --environment $1 # -v
 SRCELF=.pio/build/$1/firmware.elf
 cp $SRCELF $OUTDIR/$basename.elf
 
-if (echo $1 | grep -q "wio-sdk-wm1110"); then
-	echo "Skipping dfu file"
-else
-	echo "Generating NRF52 dfu file"
-	DFUPKG=.pio/build/$1/firmware.zip
-	cp $DFUPKG $OUTDIR/$basename-ota.zip
-fi
+echo "Generating NRF52 dfu file"
+DFUPKG=.pio/build/$1/firmware.zip
+cp $DFUPKG $OUTDIR/$basename-ota.zip
 
 echo "Generating NRF52 uf2 file"
 SRCHEX=.pio/build/$1/firmware.hex

src/platform/nrf52/main-nrf52.cpp

@@ -286,5 +286,10 @@ void clearBonds()
 
 void enterDfuMode()
 {
+// SDK kit does not have native USB like almost all other NRF52 boards
+#ifdef NRF_USE_SERIAL_DFU
+    enterSerialDfu();
+#else
     enterUf2Dfu();
+#endif
 }

variants/wio-sdk-wm1110/platformio.ini

@@ -20,7 +20,7 @@ debug_tool = jlink
 ; No need to reflash if the binary hasn't changed
 debug_load_mode = modified
 ; If not set we will default to uploading over serial (first it forces bootloader entry by talking 1200bps to cdcacm)
-upload_protocol = jlink
+upload_protocol = nrfutil
 ;upload_protocol = stlink
 ; we prefer to stop in setup() because we are an 'ardiuno' app
 debug_init_break = tbreak setup

variants/wio-sdk-wm1110/variant.h

@@ -107,6 +107,8 @@ extern "C" {
 
 #define LR1110_GNSS_ANT_PIN (32 + 5) // P1.05 37
 
+#define NRF_USE_SERIAL_DFU
+
 #ifdef __cplusplus
 }
 #endif