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Call dll functions from golang
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| package main | |
| import ( | |
| "fmt" | |
| "log" | |
| "syscall" | |
| ) | |
| type IDCRDriver struct { | |
| handle syscall.Handle | |
| pIdCardReset uintptr | |
| pGetIdCardInfo uintptr | |
| pGetIdCardNewaddr uintptr | |
| } | |
| func (d *IDCRDriver) Load(path string) error { | |
| var err error | |
| d.handle, err = syscall.LoadLibrary(path) | |
| if err != nil { | |
| return err | |
| } | |
| d.pIdCardReset, err = syscall.GetProcAddress(d.handle, "IdCardReset") | |
| if err != nil { | |
| log.Printf("GetProcAddress(IDCardReset) error: %s\n", err) | |
| } | |
| return nil | |
| } | |
| func (d *IDCRDriver) Free(path string) error { | |
| if d.handle != 0 { | |
| return syscall.FreeLibrary(d.handle) | |
| } | |
| return nil | |
| } | |
| func (d *IDCRDriver) IdCardReset(port, bp, baud int) (int, error) { | |
| if d.handle == 0 { | |
| return -1, fmt.Errorf("library not load") | |
| } | |
| ret, _, errno := syscall.SyscallN(d.pIdCardReset, uintptr(port), uintptr(bp), uintptr(baud)) | |
| if errno != 0 { | |
| return int(ret), fmt.Errorf("syscall error: %s", errno.Error()) | |
| } | |
| return int(ret), nil | |
| } | |
| func main() { | |
| driver := &IDCRDriver{} | |
| err := driver.Load("bfby_idcr.dll") | |
| if err != nil { | |
| panic(err) | |
| } | |
| ret, err := driver.IdCardReset(1, 0, 9600) | |
| if err != nil { | |
| fmt.Printf("IDCardReset error: %s\n", err) | |
| } else { | |
| fmt.Printf("IDCardReset returns: %d\n", ret) | |
| } | |
| } |
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