diff --git a/ports/zephyr/CMakeLists.txt b/ports/zephyr/CMakeLists.txt
index 80adea5d86..5c09fc76ee 100644
--- a/ports/zephyr/CMakeLists.txt
+++ b/ports/zephyr/CMakeLists.txt
@@ -38,6 +38,7 @@ set(MICROPY_SOURCE_PORT
     main.c
     help.c
     machine_i2c.c
+    machine_spi.c
     machine_pin.c
     machine_uart.c
     modbluetooth_zephyr.c
diff --git a/ports/zephyr/README.md b/ports/zephyr/README.md
index 9d6c223b47..e0b02af222 100644
--- a/ports/zephyr/README.md
+++ b/ports/zephyr/README.md
@@ -15,6 +15,7 @@ Features supported at this time:
 * `utime` module for time measurements and delays.
 * `machine.Pin` class for GPIO control, with IRQ support.
 * `machine.I2C` class for I2C control.
+* `machine.SPI` class for SPI control.
 * `usocket` module for networking (IPv4/IPv6).
 * "Frozen modules" support to allow to bundle Python modules together
   with firmware. Including complete applications, including with
@@ -135,6 +136,14 @@ Example of using I2C to scan for I2C slaves:
     i2c = I2C("I2C_0")
     i2c.scan()
 
+Example of using SPI to write a buffer to the MOSI pin:
+
+    from machine import SPI
+
+    spi = SPI("SPI_0")
+    spi.init(baudrate=500000, polarity=1, phase=1, bits=8, firstbit=SPI.MSB)
+    spi.write(b'abcd')
+
 
 Minimal build
 -------------
diff --git a/ports/zephyr/boards/frdm_k64f.conf b/ports/zephyr/boards/frdm_k64f.conf
index 483e9a29bb..c164c0c32c 100644
--- a/ports/zephyr/boards/frdm_k64f.conf
+++ b/ports/zephyr/boards/frdm_k64f.conf
@@ -3,6 +3,7 @@ CONFIG_NET_L2_ETHERNET=y
 
 # Hardware features
 CONFIG_I2C=y
+CONFIG_SPI=y
 
 # Sensor drivers
 CONFIG_FXOS8700=y
diff --git a/ports/zephyr/boards/mimxrt685_evk_cm33.conf b/ports/zephyr/boards/mimxrt685_evk_cm33.conf
new file mode 100644
index 0000000000..827222b887
--- /dev/null
+++ b/ports/zephyr/boards/mimxrt685_evk_cm33.conf
@@ -0,0 +1,2 @@
+# Hardware features
+CONFIG_SPI=y
diff --git a/ports/zephyr/machine_spi.c b/ports/zephyr/machine_spi.c
new file mode 100644
index 0000000000..2add7ff60b
--- /dev/null
+++ b/ports/zephyr/machine_spi.c
@@ -0,0 +1,211 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright 2021 NXP
+ *
+ * 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 <stdio.h>
+#include <stdint.h>
+#include <string.h>
+
+#include <zephyr.h>
+#include <drivers/spi.h>
+
+#include "py/runtime.h"
+#include "py/gc.h"
+#include "py/mphal.h"
+#include "py/mperrno.h"
+#include "extmod/machine_spi.h"
+#include "modmachine.h"
+
+#if MICROPY_PY_MACHINE_SPI
+
+#define DEFAULT_SPI_BAUDRATE    (50000)
+#define DEFAULT_SPI_POLARITY    (0)
+#define DEFAULT_SPI_PHASE       (0)
+#define DEFAULT_SPI_BITS        (8)
+#define DEFAULT_SPI_FIRSTBIT    (SPI_TRANSFER_MSB)
+#define SPI_LOOP                (0)    // For testing, enable loop mode by setting SPI_LOOP (1)
+
+typedef struct _machine_hard_spi_obj_t {
+    mp_obj_base_t base;
+    const struct device *dev;
+    struct spi_config config;
+} machine_hard_spi_obj_t;
+
+STATIC void machine_hard_spi_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
+    machine_hard_spi_obj_t *self = self_in;
+    mp_printf(print, "SPI(%s, baudrate=%u, polarity=%u, phase=%u, bits=%u, firstbit=%s)",
+        self->dev->name,
+        self->config.frequency,
+        (self->config.operation & 0x2) >> 1,
+        (self->config.operation & 0x4) >> 2,
+        (self->config.operation & ~0x1F) >> 5,
+        ((self->config.operation & 0x10) >> 4) == SPI_TRANSFER_MSB ? "MSB" : "LSB");
+}
+
+mp_obj_t machine_hard_spi_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
+    enum {ARG_id, ARG_baudrate, ARG_polarity, ARG_phase, ARG_bits, ARG_firstbit, ARG_sck, ARG_mosi, ARG_miso};
+
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_id, MP_ARG_REQUIRED | MP_ARG_OBJ },
+        { MP_QSTR_baudrate, MP_ARG_INT, {.u_int = DEFAULT_SPI_BAUDRATE} },
+        { MP_QSTR_polarity, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = DEFAULT_SPI_POLARITY} },
+        { MP_QSTR_phase, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = DEFAULT_SPI_PHASE} },
+        { MP_QSTR_bits, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = DEFAULT_SPI_BITS} },
+        { MP_QSTR_firstbit, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = DEFAULT_SPI_FIRSTBIT} },
+        { MP_QSTR_sck, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
+        { MP_QSTR_mosi, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
+        { MP_QSTR_miso, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
+    };
+
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+
+    const char *dev_name = mp_obj_str_get_str(args[ARG_id].u_obj);
+    const struct device *dev = device_get_binding(dev_name);
+
+    if (dev == NULL) {
+        mp_raise_ValueError(MP_ERROR_TEXT("device not found"));
+    }
+
+    if ((args[ARG_sck].u_obj != MP_OBJ_NULL) || (args[ARG_miso].u_obj != MP_OBJ_NULL) || (args[ARG_mosi].u_obj != MP_OBJ_NULL)) {
+        mp_raise_NotImplementedError(MP_ERROR_TEXT("explicit choice of sck/miso/mosi is not implemented"));
+    }
+
+    struct spi_config cfg = {
+        .frequency = args[ARG_baudrate].u_int,
+        .operation = (SPI_OP_MODE_MASTER |
+            args[ARG_polarity].u_int << 1 |
+                args[ARG_phase].u_int << 2 |
+                SPI_LOOP << 3 |
+                args[ARG_firstbit].u_int << 4 |
+                args[ARG_bits].u_int << 5 |
+                SPI_LINES_SINGLE),
+        .slave = 0,
+        .cs = NULL
+    };
+
+    machine_hard_spi_obj_t *self = m_new_obj(machine_hard_spi_obj_t);
+
+    self->base.type = &machine_hard_spi_type;
+    self->dev = dev;
+    self->config = cfg;
+
+    return MP_OBJ_FROM_PTR(self);
+}
+
+STATIC void machine_hard_spi_init(mp_obj_base_t *obj, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    enum {ARG_baudrate, ARG_polarity, ARG_phase, ARG_bits, ARG_firstbit};
+
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_baudrate, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
+        { MP_QSTR_polarity, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
+        { MP_QSTR_phase, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
+        { MP_QSTR_bits, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
+        { MP_QSTR_firstbit, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
+    };
+
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+
+    machine_hard_spi_obj_t *self = (machine_hard_spi_obj_t *)obj;
+
+    uint32_t baudrate;
+    uint16_t operation = self->config.operation;
+
+    if (args[ARG_baudrate].u_int != -1) {
+        baudrate = args[ARG_baudrate].u_int;
+    } else {
+        baudrate = self->config.frequency;
+    }
+
+    if (args[ARG_polarity].u_int != -1) {
+        operation = (operation & ~0x2) | (args[ARG_polarity].u_int << 1);
+    }
+
+    if (args[ARG_phase].u_int != -1) {
+        operation = (operation & ~0x4) | (args[ARG_phase].u_int << 2);
+    }
+
+    if (args[ARG_bits].u_int != -1) {
+        operation = (operation & 0x1F) | (args[ARG_bits].u_int << 5);
+    }
+
+    if (args[ARG_firstbit].u_int != -1) {
+        operation = (operation & ~0x10) | (args[ARG_firstbit].u_int << 4);
+    }
+
+    struct spi_config cfg = {
+        .frequency = baudrate,
+        .operation = operation,
+        .slave = 0,
+        .cs = NULL
+    };
+
+    self->config = cfg;
+}
+
+STATIC void machine_hard_spi_transfer(mp_obj_base_t *obj, size_t len, const uint8_t *src, uint8_t *dest) {
+    machine_hard_spi_obj_t *self = (machine_hard_spi_obj_t *)obj;
+
+    int ret;
+
+    struct spi_buf tx_bufs[1];
+    tx_bufs[0].buf = (uint8_t *)src;
+    tx_bufs[0].len = len;
+    const struct spi_buf_set tx = {
+        .buffers = tx_bufs,
+        .count = ARRAY_SIZE(tx_bufs)
+    };
+
+    struct spi_buf rx_bufs[1];
+    rx_bufs[0].buf = dest;
+    rx_bufs[0].len = len;
+    const struct spi_buf_set rx = {
+        .buffers = rx_bufs,
+        .count = ARRAY_SIZE(rx_bufs)
+    };
+
+    ret = spi_transceive(self->dev, &self->config, &tx, &rx);
+
+    if (ret < 0) {
+        mp_raise_OSError(-ret);
+    }
+}
+
+STATIC const mp_machine_spi_p_t machine_hard_spi_p = {
+    .init = machine_hard_spi_init,
+    .transfer = machine_hard_spi_transfer,
+};
+
+const mp_obj_type_t machine_hard_spi_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_SPI,
+    .print = machine_hard_spi_print,
+    .make_new = machine_hard_spi_make_new,
+    .protocol = &machine_hard_spi_p,
+    .locals_dict = (mp_obj_dict_t *)&mp_machine_spi_locals_dict,
+};
+
+#endif // MICROPY_PY_MACHINE_SPI
diff --git a/ports/zephyr/modmachine.c b/ports/zephyr/modmachine.c
index 4353083eeb..adec9160be 100644
--- a/ports/zephyr/modmachine.c
+++ b/ports/zephyr/modmachine.c
@@ -36,6 +36,7 @@
 #include "extmod/machine_signal.h"
 #include "extmod/machine_pulse.h"
 #include "extmod/machine_i2c.h"
+#include "extmod/machine_spi.h"
 #include "modmachine.h"
 
 #if MICROPY_PY_MACHINE
@@ -70,6 +71,9 @@ STATIC const mp_rom_map_elem_t machine_module_globals_table[] = {
     #if MICROPY_PY_MACHINE_I2C
     { MP_ROM_QSTR(MP_QSTR_I2C), MP_ROM_PTR(&machine_hard_i2c_type) },
     #endif
+    #if MICROPY_PY_MACHINE_SPI
+    { MP_ROM_QSTR(MP_QSTR_SPI), MP_ROM_PTR(&machine_hard_spi_type) },
+    #endif
     { MP_ROM_QSTR(MP_QSTR_UART), MP_ROM_PTR(&machine_uart_type) },
     { MP_ROM_QSTR(MP_QSTR_Pin), MP_ROM_PTR(&machine_pin_type) },
     { MP_ROM_QSTR(MP_QSTR_Signal), MP_ROM_PTR(&machine_signal_type) },
diff --git a/ports/zephyr/modmachine.h b/ports/zephyr/modmachine.h
index 957f2dd4f9..a3cdd2b30f 100644
--- a/ports/zephyr/modmachine.h
+++ b/ports/zephyr/modmachine.h
@@ -5,6 +5,7 @@
 
 extern const mp_obj_type_t machine_pin_type;
 extern const mp_obj_type_t machine_hard_i2c_type;
+extern const mp_obj_type_t machine_hard_spi_type;
 extern const mp_obj_type_t machine_uart_type;
 
 MP_DECLARE_CONST_FUN_OBJ_0(machine_info_obj);
diff --git a/ports/zephyr/mpconfigport.h b/ports/zephyr/mpconfigport.h
index c7f4653003..501c39a1bb 100644
--- a/ports/zephyr/mpconfigport.h
+++ b/ports/zephyr/mpconfigport.h
@@ -29,6 +29,7 @@
 #include "autoconf.h"
 // Included here to get basic Zephyr environment (macros, etc.)
 #include <zephyr.h>
+#include <drivers/spi.h>
 
 // Usually passed from Makefile
 #ifndef MICROPY_HEAP_SIZE
@@ -62,6 +63,9 @@
 #define MICROPY_PY_MICROPYTHON_MEM_INFO (1)
 #define MICROPY_PY_MACHINE          (1)
 #define MICROPY_PY_MACHINE_I2C      (1)
+#define MICROPY_PY_MACHINE_SPI      (1)
+#define MICROPY_PY_MACHINE_SPI_MSB (SPI_TRANSFER_MSB)
+#define MICROPY_PY_MACHINE_SPI_LSB (SPI_TRANSFER_LSB)
 #define MICROPY_PY_MACHINE_PIN_MAKE_NEW mp_pin_make_new
 #define MICROPY_MODULE_WEAK_LINKS   (1)
 #define MICROPY_PY_STRUCT           (0)