esp8266: Fix busio.SPI to take both MOSI and MISO.

tannewt · tannewt · commit ca176535a9f6 · 2017-04-18T09:44:04.000-07:00
diff --git a/esp8266/common-hal/busio/SPI.c b/esp8266/common-hal/busio/SPI.c
@@ -42,7 +42,8 @@ void common_hal_busio_spi_construct(busio_spi_obj_t *self,
         const mcu_pin_obj_t * clock, const mcu_pin_obj_t * mosi,
         const mcu_pin_obj_t * miso) {
     if (clock != &pin_MTMS || !((mosi == &pin_MTCK && miso ==  MP_OBJ_TO_PTR(mp_const_none)) ||
-                                (mosi == MP_OBJ_TO_PTR(mp_const_none) && miso == &pin_MTDI))) {
+                                (mosi == MP_OBJ_TO_PTR(mp_const_none) && miso == &pin_MTDI) ||
+                                (mosi == &pin_MTCK && miso == &pin_MTDI))) {
         nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_OSError,
             "Pins not valid for SPI"));
     }
