diff --git a/drivers/bus/softspi.c b/drivers/bus/softspi.c
new file mode 100644
index 0000000000..bc12d89d3b
--- /dev/null
+++ b/drivers/bus/softspi.c
@@ -0,0 +1,105 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016-2018 Damien P. George
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "drivers/bus/spi.h"
+
+int mp_soft_spi_ioctl(void *self_in, uint32_t cmd) {
+    mp_soft_spi_obj_t *self = (mp_soft_spi_obj_t*)self_in;
+
+    switch (cmd) {
+        case MP_SPI_IOCTL_INIT:
+            mp_hal_pin_write(self->sck, self->polarity);
+            mp_hal_pin_output(self->sck);
+            mp_hal_pin_output(self->mosi);
+            mp_hal_pin_input(self->miso);
+            break;
+
+        case MP_SPI_IOCTL_DEINIT:
+            break;
+    }
+
+    return 0;
+}
+
+void mp_soft_spi_transfer(void *self_in, size_t len, const uint8_t *src, uint8_t *dest) {
+    mp_soft_spi_obj_t *self = (mp_soft_spi_obj_t*)self_in;
+    uint32_t delay_half = self->delay_half;
+
+    // only MSB transfer is implemented
+
+    // If a port defines MICROPY_HW_SOFTSPI_MIN_DELAY, and the configured
+    // delay_half is equal to this value, then the software SPI implementation
+    // will run as fast as possible, limited only by CPU speed and GPIO time.
+    #ifdef MICROPY_HW_SOFTSPI_MIN_DELAY
+    if (delay_half == MICROPY_HW_SOFTSPI_MIN_DELAY) {
+        for (size_t i = 0; i < len; ++i) {
+            uint8_t data_out = src[i];
+            uint8_t data_in = 0;
+            for (int j = 0; j < 8; ++j, data_out <<= 1) {
+                mp_hal_pin_write(self->mosi, (data_out >> 7) & 1);
+                mp_hal_pin_write(self->sck, 1 - self->polarity);
+                data_in = (data_in << 1) | mp_hal_pin_read(self->miso);
+                mp_hal_pin_write(self->sck, self->polarity);
+            }
+            if (dest != NULL) {
+                dest[i] = data_in;
+            }
+        }
+        return;
+    }
+    #endif
+
+    for (size_t i = 0; i < len; ++i) {
+        uint8_t data_out = src[i];
+        uint8_t data_in = 0;
+        for (int j = 0; j < 8; ++j, data_out <<= 1) {
+            mp_hal_pin_write(self->mosi, (data_out >> 7) & 1);
+            if (self->phase == 0) {
+                mp_hal_delay_us_fast(delay_half);
+                mp_hal_pin_write(self->sck, 1 - self->polarity);
+            } else {
+                mp_hal_pin_write(self->sck, 1 - self->polarity);
+                mp_hal_delay_us_fast(delay_half);
+            }
+            data_in = (data_in << 1) | mp_hal_pin_read(self->miso);
+            if (self->phase == 0) {
+                mp_hal_delay_us_fast(delay_half);
+                mp_hal_pin_write(self->sck, self->polarity);
+            } else {
+                mp_hal_pin_write(self->sck, self->polarity);
+                mp_hal_delay_us_fast(delay_half);
+            }
+        }
+        if (dest != NULL) {
+            dest[i] = data_in;
+        }
+    }
+}
+
+const mp_spi_proto_t mp_soft_spi_proto = {
+    .ioctl = mp_soft_spi_ioctl,
+    .transfer = mp_soft_spi_transfer,
+};
diff --git a/drivers/bus/spi.h b/drivers/bus/spi.h
new file mode 100644
index 0000000000..6d1b9c2f83
--- /dev/null
+++ b/drivers/bus/spi.h
@@ -0,0 +1,55 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016-2018 Damien P. George
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#ifndef MICROPY_INCLUDED_DRIVERS_BUS_SPI_H
+#define MICROPY_INCLUDED_DRIVERS_BUS_SPI_H
+
+#include "py/mphal.h"
+
+enum {
+    MP_SPI_IOCTL_INIT,
+    MP_SPI_IOCTL_DEINIT,
+};
+
+typedef struct _mp_spi_proto_t {
+    int (*ioctl)(void *self, uint32_t cmd);
+    void (*transfer)(void *self, size_t len, const uint8_t *src, uint8_t *dest);
+} mp_spi_proto_t;
+
+typedef struct _mp_soft_spi_obj_t {
+    uint32_t delay_half; // microsecond delay for half SCK period
+    uint8_t polarity;
+    uint8_t phase;
+    mp_hal_pin_obj_t sck;
+    mp_hal_pin_obj_t mosi;
+    mp_hal_pin_obj_t miso;
+} mp_soft_spi_obj_t;
+
+extern const mp_spi_proto_t mp_soft_spi_proto;
+
+int mp_soft_spi_ioctl(void *self, uint32_t cmd);
+void mp_soft_spi_transfer(void *self, size_t len, const uint8_t *src, uint8_t *dest);
+
+#endif // MICROPY_INCLUDED_DRIVERS_BUS_SPI_H
diff --git a/extmod/machine_spi.c b/extmod/machine_spi.c
index cfd94fcef7..f0c4896c2e 100644
--- a/extmod/machine_spi.c
+++ b/extmod/machine_spi.c
@@ -38,61 +38,6 @@
 #define MICROPY_PY_MACHINE_SPI_LSB (1)
 #endif
 
-void mp_machine_soft_spi_transfer(mp_obj_base_t *self_in, size_t len, const uint8_t *src, uint8_t *dest) {
-    mp_machine_soft_spi_obj_t *self = (mp_machine_soft_spi_obj_t*)self_in;
-    uint32_t delay_half = self->delay_half;
-
-    // only MSB transfer is implemented
-
-    // If a port defines MICROPY_PY_MACHINE_SPI_MIN_DELAY, and the configured
-    // delay_half is equal to this value, then the software SPI implementation
-    // will run as fast as possible, limited only by CPU speed and GPIO time.
-    #ifdef MICROPY_PY_MACHINE_SPI_MIN_DELAY
-    if (delay_half == MICROPY_PY_MACHINE_SPI_MIN_DELAY) {
-        for (size_t i = 0; i < len; ++i) {
-            uint8_t data_out = src[i];
-            uint8_t data_in = 0;
-            for (int j = 0; j < 8; ++j, data_out <<= 1) {
-                mp_hal_pin_write(self->mosi, (data_out >> 7) & 1);
-                mp_hal_pin_write(self->sck, 1 - self->polarity);
-                data_in = (data_in << 1) | mp_hal_pin_read(self->miso);
-                mp_hal_pin_write(self->sck, self->polarity);
-            }
-            if (dest != NULL) {
-                dest[i] = data_in;
-            }
-        }
-        return;
-    }
-    #endif
-
-    for (size_t i = 0; i < len; ++i) {
-        uint8_t data_out = src[i];
-        uint8_t data_in = 0;
-        for (int j = 0; j < 8; ++j, data_out <<= 1) {
-            mp_hal_pin_write(self->mosi, (data_out >> 7) & 1);
-            if (self->phase == 0) {
-                mp_hal_delay_us_fast(delay_half);
-                mp_hal_pin_write(self->sck, 1 - self->polarity);
-            } else {
-                mp_hal_pin_write(self->sck, 1 - self->polarity);
-                mp_hal_delay_us_fast(delay_half);
-            }
-            data_in = (data_in << 1) | mp_hal_pin_read(self->miso);
-            if (self->phase == 0) {
-                mp_hal_delay_us_fast(delay_half);
-                mp_hal_pin_write(self->sck, self->polarity);
-            } else {
-                mp_hal_pin_write(self->sck, self->polarity);
-                mp_hal_delay_us_fast(delay_half);
-            }
-        }
-        if (dest != NULL) {
-            dest[i] = data_in;
-        }
-    }
-}
-
 /******************************************************************************/
 // MicroPython bindings for generic machine.SPI
 
@@ -199,9 +144,9 @@ MP_DEFINE_CONST_DICT(mp_machine_spi_locals_dict, machine_spi_locals_dict_table);
 // Implementation of soft SPI
 
 STATIC uint32_t baudrate_from_delay_half(uint32_t delay_half) {
-    #ifdef MICROPY_PY_MACHINE_SPI_MIN_DELAY
-    if (delay_half == MICROPY_PY_MACHINE_SPI_MIN_DELAY) {
-        return MICROPY_PY_MACHINE_SPI_MAX_BAUDRATE;
+    #ifdef MICROPY_HW_SOFTSPI_MIN_DELAY
+    if (delay_half == MICROPY_HW_SOFTSPI_MIN_DELAY) {
+        return MICROPY_HW_SOFTSPI_MAX_BAUDRATE;
     } else
     #endif
     {
@@ -210,9 +155,9 @@ STATIC uint32_t baudrate_from_delay_half(uint32_t delay_half) {
 }
 
 STATIC uint32_t baudrate_to_delay_half(uint32_t baudrate) {
-    #ifdef MICROPY_PY_MACHINE_SPI_MIN_DELAY
-    if (baudrate >= MICROPY_PY_MACHINE_SPI_MAX_BAUDRATE) {
-        return MICROPY_PY_MACHINE_SPI_MIN_DELAY;
+    #ifdef MICROPY_HW_SOFTSPI_MIN_DELAY
+    if (baudrate >= MICROPY_HW_SOFTSPI_MAX_BAUDRATE) {
+        return MICROPY_HW_SOFTSPI_MIN_DELAY;
     } else
     #endif
     {
@@ -229,8 +174,8 @@ STATIC void mp_machine_soft_spi_print(const mp_print_t *print, mp_obj_t self_in,
     mp_machine_soft_spi_obj_t *self = MP_OBJ_TO_PTR(self_in);
     mp_printf(print, "SoftSPI(baudrate=%u, polarity=%u, phase=%u,"
         " sck=" MP_HAL_PIN_FMT ", mosi=" MP_HAL_PIN_FMT ", miso=" MP_HAL_PIN_FMT ")",
-        baudrate_from_delay_half(self->delay_half), self->polarity, self->phase,
-        mp_hal_pin_name(self->sck), mp_hal_pin_name(self->mosi), mp_hal_pin_name(self->miso));
+        baudrate_from_delay_half(self->spi.delay_half), self->spi.polarity, self->spi.phase,
+        mp_hal_pin_name(self->spi.sck), mp_hal_pin_name(self->spi.mosi), mp_hal_pin_name(self->spi.miso));
 }
 
 STATIC mp_obj_t mp_machine_soft_spi_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
@@ -253,9 +198,9 @@ STATIC mp_obj_t mp_machine_soft_spi_make_new(const mp_obj_type_t *type, size_t n
     self->base.type = &mp_machine_soft_spi_type;
 
     // set parameters
-    self->delay_half = baudrate_to_delay_half(args[ARG_baudrate].u_int);
-    self->polarity = args[ARG_polarity].u_int;
-    self->phase = args[ARG_phase].u_int;
+    self->spi.delay_half = baudrate_to_delay_half(args[ARG_baudrate].u_int);
+    self->spi.polarity = args[ARG_polarity].u_int;
+    self->spi.phase = args[ARG_phase].u_int;
     if (args[ARG_bits].u_int != 8) {
         mp_raise_ValueError("bits must be 8");
     }
@@ -267,15 +212,12 @@ STATIC mp_obj_t mp_machine_soft_spi_make_new(const mp_obj_type_t *type, size_t n
         || args[ARG_miso].u_obj == MP_OBJ_NULL) {
         mp_raise_ValueError("must specify all of sck/mosi/miso");
     }
-    self->sck = mp_hal_get_pin_obj(args[ARG_sck].u_obj);
-    self->mosi = mp_hal_get_pin_obj(args[ARG_mosi].u_obj);
-    self->miso = mp_hal_get_pin_obj(args[ARG_miso].u_obj);
+    self->spi.sck = mp_hal_get_pin_obj(args[ARG_sck].u_obj);
+    self->spi.mosi = mp_hal_get_pin_obj(args[ARG_mosi].u_obj);
+    self->spi.miso = mp_hal_get_pin_obj(args[ARG_miso].u_obj);
 
-    // configure pins
-    mp_hal_pin_write(self->sck, self->polarity);
-    mp_hal_pin_output(self->sck);
-    mp_hal_pin_output(self->mosi);
-    mp_hal_pin_input(self->miso);
+    // configure bus
+    mp_soft_spi_ioctl(&self->spi, MP_SPI_IOCTL_INIT);
 
     return MP_OBJ_FROM_PTR(self);
 }
@@ -296,29 +238,31 @@ STATIC void mp_machine_soft_spi_init(mp_obj_base_t *self_in, size_t n_args, cons
     mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
 
     if (args[ARG_baudrate].u_int != -1) {
-        self->delay_half = baudrate_to_delay_half(args[ARG_baudrate].u_int);
+        self->spi.delay_half = baudrate_to_delay_half(args[ARG_baudrate].u_int);
     }
     if (args[ARG_polarity].u_int != -1) {
-        self->polarity = args[ARG_polarity].u_int;
+        self->spi.polarity = args[ARG_polarity].u_int;
     }
     if (args[ARG_phase].u_int != -1) {
-        self->phase = args[ARG_phase].u_int;
+        self->spi.phase = args[ARG_phase].u_int;
     }
     if (args[ARG_sck].u_obj != MP_OBJ_NULL) {
-        self->sck = mp_hal_get_pin_obj(args[ARG_sck].u_obj);
+        self->spi.sck = mp_hal_get_pin_obj(args[ARG_sck].u_obj);
     }
     if (args[ARG_mosi].u_obj != MP_OBJ_NULL) {
-        self->mosi = mp_hal_get_pin_obj(args[ARG_mosi].u_obj);
+        self->spi.mosi = mp_hal_get_pin_obj(args[ARG_mosi].u_obj);
     }
     if (args[ARG_miso].u_obj != MP_OBJ_NULL) {
-        self->miso = mp_hal_get_pin_obj(args[ARG_miso].u_obj);
+        self->spi.miso = mp_hal_get_pin_obj(args[ARG_miso].u_obj);
     }
 
-    // configure pins
-    mp_hal_pin_write(self->sck, self->polarity);
-    mp_hal_pin_output(self->sck);
-    mp_hal_pin_output(self->mosi);
-    mp_hal_pin_input(self->miso);
+    // configure bus
+    mp_soft_spi_ioctl(&self->spi, MP_SPI_IOCTL_INIT);
+}
+
+STATIC void mp_machine_soft_spi_transfer(mp_obj_base_t *self_in, size_t len, const uint8_t *src, uint8_t *dest) {
+    mp_machine_soft_spi_obj_t *self = (mp_machine_soft_spi_obj_t*)self_in;
+    mp_soft_spi_transfer(&self->spi, len, src, dest);
 }
 
 const mp_machine_spi_p_t mp_machine_soft_spi_p = {
diff --git a/extmod/machine_spi.h b/extmod/machine_spi.h
index 3ee1b241f0..db21e1cd31 100644
--- a/extmod/machine_spi.h
+++ b/extmod/machine_spi.h
@@ -28,6 +28,7 @@
 
 #include "py/obj.h"
 #include "py/mphal.h"
+#include "drivers/bus/spi.h"
 
 // SPI protocol
 typedef struct _mp_machine_spi_p_t {
@@ -38,20 +39,13 @@ typedef struct _mp_machine_spi_p_t {
 
 typedef struct _mp_machine_soft_spi_obj_t {
     mp_obj_base_t base;
-    uint32_t delay_half; // microsecond delay for half SCK period
-    uint8_t polarity;
-    uint8_t phase;
-    mp_hal_pin_obj_t sck;
-    mp_hal_pin_obj_t mosi;
-    mp_hal_pin_obj_t miso;
+    mp_soft_spi_obj_t spi;
 } mp_machine_soft_spi_obj_t;
 
 extern const mp_machine_spi_p_t mp_machine_soft_spi_p;
 extern const mp_obj_type_t mp_machine_soft_spi_type;
 extern const mp_obj_dict_t mp_machine_spi_locals_dict;
 
-void mp_machine_soft_spi_transfer(mp_obj_base_t *self, size_t len, const uint8_t *src, uint8_t *dest);
-
 mp_obj_t mp_machine_spi_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args);
 
 MP_DECLARE_CONST_FUN_OBJ_VAR_BETWEEN(mp_machine_spi_read_obj);
diff --git a/ports/esp32/Makefile b/ports/esp32/Makefile
index eb0a3be249..d2d6192b5f 100644
--- a/ports/esp32/Makefile
+++ b/ports/esp32/Makefile
@@ -195,6 +195,7 @@ LIB_SRC_C += \
 endif
 
 DRIVERS_SRC_C = $(addprefix drivers/,\
+	bus/softspi.c \
 	dht/dht.c \
 	)
 
diff --git a/ports/esp32/mpconfigport.h b/ports/esp32/mpconfigport.h
index bf027f1c5c..80594b1144 100644
--- a/ports/esp32/mpconfigport.h
+++ b/ports/esp32/mpconfigport.h
@@ -135,8 +135,8 @@
 #define MICROPY_PY_MACHINE_SPI_MSB          (0)
 #define MICROPY_PY_MACHINE_SPI_LSB          (1)
 #define MICROPY_PY_MACHINE_SPI_MAKE_NEW     machine_hw_spi_make_new
-#define MICROPY_PY_MACHINE_SPI_MIN_DELAY    (0)
-#define MICROPY_PY_MACHINE_SPI_MAX_BAUDRATE (ets_get_cpu_frequency() * 1000000 / 200) // roughly
+#define MICROPY_HW_SOFTSPI_MIN_DELAY        (0)
+#define MICROPY_HW_SOFTSPI_MAX_BAUDRATE     (ets_get_cpu_frequency() * 1000000 / 200) // roughly
 #define MICROPY_PY_USSL                     (1)
 #define MICROPY_SSL_MBEDTLS                 (1)
 #define MICROPY_PY_USSL_FINALISER           (1)
diff --git a/ports/esp8266/Makefile b/ports/esp8266/Makefile
index 9d6e502c78..716f18d6a1 100644
--- a/ports/esp8266/Makefile
+++ b/ports/esp8266/Makefile
@@ -130,6 +130,7 @@ LIB_SRC_C += \
 endif
 
 DRIVERS_SRC_C = $(addprefix drivers/,\
+	bus/softspi.c \
 	dht/dht.c \
         )
 
diff --git a/ports/esp8266/esp8266_common.ld b/ports/esp8266/esp8266_common.ld
index 08da02869a..6b7eba56a8 100644
--- a/ports/esp8266/esp8266_common.ld
+++ b/ports/esp8266/esp8266_common.ld
@@ -135,6 +135,7 @@ SECTIONS
         *lib/netutils/*.o*(.literal*, .text*)
         *lib/timeutils/*.o*(.literal*, .text*)
         *lib/utils/*.o*(.literal*, .text*)
+        *drivers/bus/*.o(.literal* .text*)
 
         build/main.o(.literal* .text*)
         *gccollect.o(.literal* .text*)
diff --git a/ports/stm32/Makefile b/ports/stm32/Makefile
index 112093f844..765c55a352 100644
--- a/ports/stm32/Makefile
+++ b/ports/stm32/Makefile
@@ -187,6 +187,7 @@ EXTMOD_SRC_C = $(addprefix extmod/,\
         )
 
 DRIVERS_SRC_C = $(addprefix drivers/,\
+	bus/softspi.c \
 	bus/softqspi.c \
 	memory/spiflash.c \
 	dht/dht.c \
diff --git a/ports/stm32/mpconfigport.h b/ports/stm32/mpconfigport.h
index 35b59cbfd8..a0a67e95f9 100644
--- a/ports/stm32/mpconfigport.h
+++ b/ports/stm32/mpconfigport.h
@@ -140,8 +140,8 @@
 #define MICROPY_PY_MACHINE_SPI_MSB  (SPI_FIRSTBIT_MSB)
 #define MICROPY_PY_MACHINE_SPI_LSB  (SPI_FIRSTBIT_LSB)
 #define MICROPY_PY_MACHINE_SPI_MAKE_NEW machine_hard_spi_make_new
-#define MICROPY_PY_MACHINE_SPI_MIN_DELAY (0)
-#define MICROPY_PY_MACHINE_SPI_MAX_BAUDRATE (HAL_RCC_GetSysClockFreq() / 48)
+#define MICROPY_HW_SOFTSPI_MIN_DELAY (0)
+#define MICROPY_HW_SOFTSPI_MAX_BAUDRATE (HAL_RCC_GetSysClockFreq() / 48)
 #define MICROPY_PY_FRAMEBUF         (1)
 #ifndef MICROPY_PY_USOCKET
 #define MICROPY_PY_USOCKET          (1)
diff --git a/ports/stm32/spibdev.c b/ports/stm32/spibdev.c
index 3eadb995d6..846b29d1f0 100644
--- a/ports/stm32/spibdev.c
+++ b/ports/stm32/spibdev.c
@@ -42,12 +42,14 @@ static uint32_t flash_tick_counter_last_write;
 
 STATIC const mp_machine_soft_spi_obj_t spiflash_spi_bus = {
     .base = {&mp_machine_soft_spi_type},
-    .delay_half = MICROPY_PY_MACHINE_SPI_MIN_DELAY,
+    .spi = {
+    .delay_half = MICROPY_HW_SOFTSPI_MIN_DELAY,
     .polarity = 0,
     .phase = 0,
     .sck = &MICROPY_HW_SPIFLASH_SCK,
     .mosi = &MICROPY_HW_SPIFLASH_MOSI,
     .miso = &MICROPY_HW_SPIFLASH_MISO,
+    }
 };
 
 STATIC const mp_spiflash_config_t spiflash_config = {