support flashing pca10059 from windows

builder/build.go

@@ -639,6 +639,18 @@ func Build(pkgName, outpath string, config *compileopts.Config, action func(Buil
 		if err != nil {
 			return err
 		}
+	case "nrf-dfu":
+		// special format for nrfutil for Nordic chips
+		tmphexpath := filepath.Join(dir, "main.hex")
+		err := objcopy(executable, tmphexpath, "hex")
+		if err != nil {
+			return err
+		}
+		tmppath = filepath.Join(dir, "main"+outext)
+		err = makeDFUFirmwareImage(config.Options, tmphexpath, tmppath)
+		if err != nil {
+			return err
+		}
 	default:
 		return fmt.Errorf("unknown output binary format: %s", outputBinaryFormat)
 	}

builder/nrfutil.go

@@ -0,0 +1,27 @@
+package builder
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os/exec"
+
+	"github.com/tinygo-org/tinygo/compileopts"
+)
+
+// https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_nrfutil%2FUG%2Fnrfutil%2Fnrfutil_intro.html
+
+func makeDFUFirmwareImage(options *compileopts.Options, infile, outfile string) error {
+	cmdLine := []string{"nrfutil", "pkg", "generate", "--hw-version", "52", "--sd-req", "0x0", "--debug-mode", "--application", infile, outfile}
+
+	if options.PrintCommands != nil {
+		options.PrintCommands(cmdLine[0], cmdLine[1:]...)
+	}
+
+	cmd := exec.Command(cmdLine[0], cmdLine[1:]...)
+	cmd.Stdout = ioutil.Discard
+	err := cmd.Run()
+	if err != nil {
+		return fmt.Errorf("could not run nrfutil pkg generate: %w", err)
+	}
+	return nil
+}

compileopts/config.go

@@ -254,6 +254,11 @@ func (c *Config) BinaryFormat(ext string) string {
 		// More information:
 		// https://github.com/Microsoft/uf2
 		return "uf2"
+	case ".zip":
+		if c.Target.BinaryFormat != "" {
+			return c.Target.BinaryFormat
+		}
+		return "zip"
 	default:
 		// Use the ELF format for unrecognized file formats.
 		return "elf"

main.go

@@ -275,6 +275,8 @@ func Flash(pkgName, port string, options *compileopts.Options) error {
 			fileExt = ".bin"
 		case strings.Contains(config.Target.FlashCommand, "{uf2}"):
 			fileExt = ".uf2"
+		case strings.Contains(config.Target.FlashCommand, "{zip}"):
+			fileExt = ".zip"
 		default:
 			return errors.New("invalid target file - did you forget the {hex} token in the 'flash-command' section?")
 		}

targets/pca10059.json

@@ -2,5 +2,6 @@
 	"inherits": ["nrf52840"],
 	"build-tags": ["pca10059"],
 	"linkerscript": "targets/pca10059.ld",
-	"flash-command": "nrfutil pkg generate --hw-version 52 --sd-req 0x0 --application {hex} --application-version 1 /tmp/tinygo_$$.zip && nrfutil dfu usb-serial -pkg /tmp/tinygo_$$.zip -p {port} -b 115200 && rm -f /tmp/tinygo_$$.zip"
+	"binary-format": "nrf-dfu",
+	"flash-command": "nrfutil dfu usb-serial -pkg {zip} -p {port} -b 115200"
 }