Erik Brakkee
4949beae3e
- Add mutex to prevent interleaved log output from concurrent goroutines - Make logMsg delegate to logPrintf for consistent synchronization - Buffer events channel to size 1 with select/drop when full - Close events channel on ListenForTrainer exit so process terminates
91 lines
2.5 KiB
Go
91 lines
2.5 KiB
Go
package main
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import (
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"fmt"
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"os"
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"os/exec"
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"strconv"
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"github.com/spf13/cobra"
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)
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// Version and BuildTime are injected via ldflags at build time.
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var Version = "unknown"
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var BuildTime = "unknown"
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func parseHex(s string, bits int) (uint64, error) {
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return strconv.ParseUint(s, 0, bits)
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}
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type config struct {
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vendor string
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product string
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device string
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vendorID uint64
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productID uint64
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deviceNumber uint32
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}
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func newConfig() *config {
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return &config{}
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}
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func main() {
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rootCmd := &cobra.Command{
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Use: "bridge",
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Short: "ANT+ to Bluetooth LE bridge",
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Long: `Bridge an ANT+ cycling power trainer over Bluetooth Low Energy.
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This allows these trainers to be used with modern devices that don't support ANT+.`,
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Version: fmt.Sprintf("%s (built %s)", Version, BuildTime),
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RunE: func(cmd *cobra.Command, args []string) error {
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c := newConfig()
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c.vendor = cmd.Flags().Lookup("vendor").Value.String()
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c.product = cmd.Flags().Lookup("product").Value.String()
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c.device = cmd.Flags().Lookup("device").Value.String()
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vendorID, err := parseHex(c.vendor, 16)
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if err != nil {
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return fmt.Errorf("invalid --vendor %q: %w", c.vendor, err)
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}
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productID, err := parseHex(c.product, 16)
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if err != nil {
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return fmt.Errorf("invalid --product %q: %w", c.product, err)
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}
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deviceNumber, err := parseHex(c.device, 32)
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if err != nil {
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return fmt.Errorf("invalid --device %q: %w", c.device, err)
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}
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c.vendorID = vendorID
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c.productID = productID
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c.deviceNumber = uint32(deviceNumber)
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logMsgf("ANT Bridge %s built %s", Version, BuildTime)
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logMsgf("vendor: 0x%04x/%d", vendorID, vendorID)
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logMsgf("product: 0x%04x/%d", productID, productID)
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logMsgf("device: 0x%03x/%d", deviceNumber, deviceNumber)
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if err := exec.Command("hciconfig", "hci0", "down").Run(); err != nil {
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logPrintf("hciconfig down failed: %v\n", err)
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}
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if err := exec.Command("hciconfig", "hci0", "up").Run(); err != nil {
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logPrintf("hciconfig up failed: %v\n", err)
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}
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events := make(chan Event, 1)
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go ListenForTrainer(uint16(c.vendorID), uint16(c.productID), c.deviceNumber, events)
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ExposeBluetooth(events)
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return nil
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},
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}
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rootCmd.Flags().String("vendor", "0x0fcf", "USB vendor ID (hex, e.g. 0x0fcf)")
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rootCmd.Flags().String("product", "0x1008", "USB product ID (hex, e.g. 0x1008)")
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rootCmd.Flags().String("device", "3001", "ANT+ device number (hex or decimal, e.g. 3001 or 0xbb9)")
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if err := rootCmd.Execute(); err != nil {
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os.Exit(1)
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}
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}
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