Trying to make DFU work. No luck so far.

code/parasite/boards/e73-tbb.json

@@ -9,20 +9,8 @@
     "f_cpu": "64000000L",
     "hwids": [
       [
-        "0x239A",
-        "0x8029"
-      ],
-      [
-        "0x239A",
-        "0x0029"
-      ],
-      [
-        "0x239A",
-        "0x002A"
-      ],
-      [
-        "0x239A",
-        "0x802A"
+        "0x1a86",
+        "0x7523"
       ]
     ],
     "usb_product": "E73-TBB nRF52832 development board",
@@ -58,7 +46,7 @@
     "maximum_size": 524288,
     "require_upload_port": true,
     "speed": 115200,
-    "protocol": "jlink",
+    "protocol": "nrfutil",
     "protocols": [
       "jlink",
       "nrfjprog",

code/parasite/platformio.ini

@@ -14,3 +14,9 @@ platform = nordicnrf52
 ; board = adafruit_feather_nrf52832
 board = e73-tbb
 framework = arduino
+build_flags = -DNRF52 -DS132 -DNRF51_S132
+; upload_port = /dev/cu.usbserial-14330
+; debug_tool = jlink
+; protocol = nrfutil
+; lib_deps =
+;   mbed-glimwormbeacons/SEGGER_RTT2 @ 0.0.0+sha.a7800e894aaf

code/parasite/src/main.cpp

@@ -6,9 +6,11 @@ constexpr int kLED2Pin = 18;
 void setup() {
   pinMode(kLED1Pin, OUTPUT);
   pinMode(kLED2Pin, OUTPUT);
+  // Serial.begin(9600);
 }
 
 void loop() {
+  // Serial.print("Hello, world\n");
   digitalWrite(kLED1Pin, LOW);
   digitalWrite(kLED2Pin, LOW);
   delay(1000);

resources.md

@@ -8,3 +8,32 @@
 
 # Articles
 * Great article about using Rust and Apache Mynewt, but also covers J-Link, ST-Link, openocd, unlocking the nrf52. [Link on medium](https://medium.com/@ly.lee/coding-nrf52-with-rust-and-apache-mynewt-on-visual-studio-code-9521bcba6004)
+
+# SWD vs. Bootloader vs. DFU
+* How `nrfutil` is used in the platformio nordicnrf52 package: [link](https://github.com/platformio/platform-nordicnrf52/blob/develop/builder/main.py#L319)
+* Seems like we can use DFU if we install a DFU-enabled bootloader like the [Adafruit_nRF52_Bootloader](https://github.com/adafruit/Adafruit_nRF52_Bootloader)
+* Using the adafruit nrf52 bootloader with the E73-TBB [link](https://ssihla.wordpress.com/2019/07/23/using-adafruits-bluefruit-nrf52-feather-bootloader-on-a-cheap-chineese-board/)
+
+## Burning the Adafruit bootloader
+1. `$ brew cask install nordic-nrf-command-line-tools` -> Didn't work. I had to manually install the pkgs from [nordic](https://www.nordicsemi.com/Software-and-tools/Development-Tools/nRF-Command-Line-Tools/Download)
+1. `pip install intelhex`
+1. `PATH=$PATH:/Users/rbaron/.platformio/packages/framework-arduinoadafruitnrf52/tools/adafruit-nrfutil/macos make BOARD=feather_nrf52840_express all`
+
+## Uploading with nrfutil
+```
+$ ~/.platformio/packages/framework-arduinoadafruitnrf52/tools/adafruit-nrfutil/macos/adafruit-nrfutil dfu genpkg --dev-type 0x0052 --sd-req 0x00B7 --application .pio/build/e73-tbb/firmware.hex dfu-pkg.zip
+Zip created at dfu-pkg.zip
+
+$ ~/.platformio/packages/framework-arduinoadafruitnrf52/tools/adafruit-nrfutil/macos/adafruit-nrfutil dfu serial --package dfu-pkg.zip -p /dev/cu.usbserial-14330 -b 115200
+Upgrading target on /dev/cu.usbserial-14330 with DFU package /Users/rbaron/dev/parasite/code/parasite/dfu-pkg.zip. Flow control is disabled, Dual bank, Touch disabled
+########################################
+########################################
+########################################
+########################################
+########################################
+#######################
+Activating new firmware
+Device programmed.
+```
+
+It flashes okay, but the program doesn't seem to run - the leds don't flash.