diff --git a/meson.build b/meson.build
index 16ff81fe..0d849d15 100644
--- a/meson.build
+++ b/meson.build
@@ -250,6 +250,7 @@ mk22fn512_src = ['platform/mcu/MK22FN512xxx12/boot/startup.cpp',
'platform/mcu/MK22FN512xxx12/drivers/usb/usb_device_khci.c',
'platform/mcu/MK22FN512xxx12/drivers/usb/usb_osa_bm.c',
'platform/mcu/MK22FN512xxx12/drivers/usb_vcom.c',
+ 'platform/drivers/SPI/spi_mk22.c',
'platform/mcu/CMSIS/Device/NXP/MK22FN512xxx12/Source/system_MK22F51212.c']
mk22fn512_inc = ['platform/mcu/CMSIS/Include',
diff --git a/platform/drivers/SPI/spi_mk22.c b/platform/drivers/SPI/spi_mk22.c
new file mode 100644
index 00000000..a7059219
--- /dev/null
+++ b/platform/drivers/SPI/spi_mk22.c
@@ -0,0 +1,151 @@
+/***************************************************************************
+ * Copyright (C) 2021 - 2024 by Federico Amedeo Izzo IU2NUO, *
+ * Niccolò Izzo IU2KIN *
+ * Frederik Saraci IU2NRO *
+ * Silvano Seva IU2KWO *
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation; either version 3 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * This program is distributed in the hope that it will be useful, *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
+ * GNU General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU General Public License *
+ * along with this program; if not, see *
+ ***************************************************************************/
+
+#include
+#include
+#include "spi_mk22.h"
+
+
+static inline uint8_t spi_sendRecv(SPI_Type *spi, const uint8_t val)
+{
+ spi->MCR &= ~SPI_MCR_HALT_MASK; // Start transfer
+
+ spi->MCR |= SPI_MCR_CLR_TXF_MASK | SPI_MCR_CLR_RXF_MASK;
+
+ while((spi->SR & SPI_SR_TFFF_MASK) == 0) ;
+
+ spi->PUSHR = SPI_PUSHR_EOQ_MASK | val;
+
+ spi->SR |= SPI_SR_TFFF_MASK;
+
+ while((spi->SR & SPI_SR_RFDF_MASK) == 0) ;
+ spi->SR |= SPI_SR_RFDF_MASK;
+
+ spi->MCR |= SPI_MCR_HALT_MASK; // Start transfer
+
+ return spi->POPR;
+}
+
+int spiMk22_init(const struct spiDevice *dev, const uint8_t pbr, const uint8_t br,
+ const uint8_t flags)
+{
+ SPI_Type *spi = (SPI_Type *) dev->priv;
+ switch((uint32_t) spi)
+ {
+ case SPI0_BASE:
+ SIM->SCGC6 |= SIM_SCGC6_SPI0_MASK;
+ __DSB();
+ break;
+
+ case SPI1_BASE:
+ SIM->SCGC6 |= SIM_SCGC6_SPI1_MASK;
+ __DSB();
+ break;
+
+ default:
+ return -ENODEV;
+ break;
+ }
+
+ spi->MCR &= ~SPI_MCR_MDIS_MASK; // Enable the SPI module
+ spi->MCR |= SPI_MCR_MSTR_MASK // Master mode
+ | SPI_MCR_PCSIS_MASK // CS high when inactive
+ | SPI_MCR_DIS_RXF_MASK // Disable RX FIFO
+ | SPI_MCR_DIS_TXF_MASK // Disable TX FIFO
+ | SPI_MCR_HALT_MASK; // Stop transfers
+
+ spi->CTAR[0] = SPI_CTAR_FMSZ(7) // 8bit frame size
+ | SPI_CTAR_PBR(pbr) // CLK prescaler divide by 5
+ | SPI_CTAR_BR(br) // CLK scaler divide by 8
+ | SPI_CTAR_PCSSCK(1)
+ | SPI_CTAR_PASC(1)
+ | SPI_CTAR_CSSCK(4)
+ | SPI_CTAR_ASC(4);
+
+ if((flags & SPI_FLAG_CPOL) != 0)
+ spi->CTAR[0] |= SPI_CTAR_CPOL_MASK;
+
+ if((flags & SPI_FLAG_CPHA) != 0)
+ spi->CTAR[0] |= SPI_CTAR_CPHA_MASK;
+
+ if((flags & SPI_LSB_FIRST) != 0)
+ spi->CTAR[0] |= SPI_CTAR_LSBFE_MASK;
+
+ if(dev->mutex != NULL)
+ pthread_mutex_init((pthread_mutex_t *) dev->mutex, NULL);
+
+ return 0;
+}
+
+void spiMk22_terminate(const struct spiDevice *dev)
+{
+ SPI_Type *spi = (SPI_Type *) dev->priv;
+ switch((uint32_t) spi)
+ {
+ case SPI0_BASE:
+ SIM->SCGC6 &= ~SIM_SCGC6_SPI0_MASK;
+ __DSB();
+ break;
+
+ case SPI1_BASE:
+ SIM->SCGC6 &= ~SIM_SCGC6_SPI1_MASK;
+ __DSB();
+ break;
+
+ default:
+ break;
+ }
+
+ if(dev->mutex != NULL)
+ pthread_mutex_destroy((pthread_mutex_t *) dev->mutex);
+}
+
+int spiMk22_transfer(const struct spiDevice *dev, const void *txBuf,
+ void *rxBuf, const size_t size)
+{
+ SPI_Type *spi = (SPI_Type *) dev->priv;
+ uint8_t *rxData = (uint8_t *) rxBuf;
+ const uint8_t *txData = (const uint8_t *) txBuf;
+
+ // Send only
+ if(rxBuf == NULL)
+ {
+ for(size_t i = 0; i < size; i++)
+ spi_sendRecv(spi, txData[i]);
+
+ return 0;
+ }
+
+ // Receive only
+ if(txBuf == NULL)
+ {
+ for(size_t i = 0; i < size; i++)
+ rxData[i] = spi_sendRecv(spi, 0x00);
+
+ return 0;
+ }
+
+ // Transmit and receive
+ for(size_t i = 0; i < size; i++)
+ rxData[i] = spi_sendRecv(spi, txData[i]);
+
+ return 0;
+}
+
diff --git a/platform/drivers/SPI/spi_mk22.h b/platform/drivers/SPI/spi_mk22.h
new file mode 100644
index 00000000..71a92e7e
--- /dev/null
+++ b/platform/drivers/SPI/spi_mk22.h
@@ -0,0 +1,73 @@
+/***************************************************************************
+ * Copyright (C) 2021 - 2024 by Federico Amedeo Izzo IU2NUO, *
+ * Niccolò Izzo IU2KIN *
+ * Frederik Saraci IU2NRO *
+ * Silvano Seva IU2KWO *
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation; either version 3 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * This program is distributed in the hope that it will be useful, *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
+ * GNU General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU General Public License *
+ * along with this program; if not, see *
+ ***************************************************************************/
+
+#ifndef SPI_MK22_H
+#define SPI_MK22_H
+
+#include
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Instantiate an MK22 SPI master device.
+ *
+ * @param name: device name.
+ * @param peripheral: underlying MCU peripheral.
+ * @param mutx: pointer to mutex, or NULL.
+ */
+#define SPI_MK22_DEVICE_DEFINE(name, peripheral, mutx) \
+extern int spiMk22_transfer(const struct spiDevice *dev, const void *txBuf, \
+ void *rxBuf, const size_t size); \
+const struct spiDevice name = \
+{ \
+ .transfer = &spiMk22_transfer, \
+ .priv = peripheral, \
+ .mutex = mutx \
+};
+
+/**
+ * Initialise an SPI peripheral and driver.
+ * Is left to application code to change the operating mode and alternate function
+ * mapping of the corresponding gpio lines.
+ *
+ * @param dev: SPI device descriptor.
+ * @param pbr: value for the baud rate prescaler (see reference manual).
+ * @param br: value for the baud rate scaler (see reference manual).
+ * @param flags: SPI configuration flags.
+ * @return zero on success, a negative error code otherwise.
+ */
+int spiMk22_init(const struct spiDevice *dev, const uint8_t pbr, const uint8_t br,
+ const uint8_t flags);
+
+/**
+ * Shut down an SPI peripheral and driver.
+ *
+ * @param dev: SPI device descriptor.
+ */
+void spiMk22_terminate(const struct spiDevice *dev);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* SPI_MK22_H */