3 files changed, 12 insertions, 0 deletions
diff --git a/ports/stm32/machine_spi.c b/ports/stm32/machine_spi.c
index b916252da..0a5a67ef2 100644
--- a/ports/stm32/machine_spi.c
+++ b/ports/stm32/machine_spi.c
@@ -28,6 +28,8 @@
 #include "extmod/modmachine.h"
 #include "spi.h"
 
+#if MICROPY_PY_MACHINE_SPI
+
 /******************************************************************************/
 // Implementation of hard SPI for machine module
 
@@ -150,3 +152,5 @@ MP_DEFINE_CONST_OBJ_TYPE(
     protocol, &machine_hard_spi_p,
     locals_dict, &mp_machine_spi_locals_dict
     );
+
+#endif // MICROPY_PY_MACHINE_SPI
diff --git a/ports/stm32/pyb_spi.c b/ports/stm32/pyb_spi.c
index f36c04874..f92642ddd 100644
--- a/ports/stm32/pyb_spi.c
+++ b/ports/stm32/pyb_spi.c
@@ -29,6 +29,8 @@
 #include "bufhelper.h"
 #include "spi.h"
 
+#if MICROPY_PY_PYB
+
 /******************************************************************************/
 // MicroPython bindings for legacy pyb API
 
@@ -362,3 +364,5 @@ MP_DEFINE_CONST_OBJ_TYPE(
     protocol, &pyb_spi_p,
     locals_dict, &pyb_spi_locals_dict
     );
+
+#endif // MICROPY_PY_PYB
diff --git a/ports/stm32/spi.c b/ports/stm32/spi.c
index ee2301c80..df71efd3f 100644
--- a/ports/stm32/spi.c
+++ b/ports/stm32/spi.c
@@ -735,6 +735,8 @@ void spi_print(const mp_print_t *print, const spi_t *spi_obj, bool legacy) {
     mp_print_str(print, ")");
 }
 
+#if MICROPY_PY_MACHINE_SPI
+
 const spi_t *spi_from_mp_obj(mp_obj_t o) {
     if (mp_obj_is_type(o, &pyb_spi_type)) {
         pyb_spi_obj_t *self = MP_OBJ_TO_PTR(o);
@@ -761,6 +763,8 @@ mp_obj_base_t *mp_hal_get_spi_obj(mp_obj_t o) {
     }
 }
 
+#endif
+
 /******************************************************************************/
 // Implementation of low-level SPI C protocol