RPIZeroDuplexPOCSAG/rfm69
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This commit is contained in:
Friedl Ulrich 2015-02-08 17:38:53 +01:00
parent b3a45db48a
commit 1dc12ff5c1
1 changed files with 6 additions and 1 deletions
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7
spi_linux.go
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@ -84,7 +84,10 @@ int spi_xfer(int fd, char* tx, char* rx, int length) {
}
*/
import "C"
import "unsafe"
import (
"log"
"unsafe"
)
import "errors"
// SPIDevice device
@ -107,7 +110,9 @@ func NewSPIDevice() (*SPIDevice, error) {
func (d *SPIDevice) Xfer(tx []byte) ([]byte, error) {
length := len(tx)
rx := make([]byte, length)
log.Print("sending", tx)
ret := C.spi_xfer(d.fd, (*C.char)(unsafe.Pointer(&tx[0])), (*C.char)(unsafe.Pointer(&rx[0])), C.int(length))
log.Print("got", rx)
if ret < 0 {
return nil, errors.New("could not xfer")
}