diff --git a/src/main/config/config.c b/src/main/config/config.c
index fb5cb7eaf2..7fbf5193e7 100755
--- a/src/main/config/config.c
+++ b/src/main/config/config.c
@@ -37,6 +37,7 @@
 #include "drivers/system.h"
 #include "drivers/timer.h"
 #include "drivers/pwm_rx.h"
+#include "drivers/rx_spi.h"
 #include "drivers/serial.h"
 #include "drivers/pwm_output.h"
 #include "drivers/max7456.h"
@@ -62,6 +63,7 @@
 #include "io/vtx.h"
 
 #include "rx/rx.h"
+#include "rx/rx_spi.h"
 
 #include "telemetry/telemetry.h"
 
@@ -83,6 +85,9 @@
 #ifndef DEFAULT_RX_FEATURE
 #define DEFAULT_RX_FEATURE FEATURE_RX_PARALLEL_PWM
 #endif
+#ifndef RX_SPI_DEFAULT_PROTOCOL
+#define RX_SPI_DEFAULT_PROTOCOL 0
+#endif
 
 #define BRUSHED_MOTORS_PWM_RATE 16000
 #ifdef STM32F4
@@ -454,6 +459,7 @@ void createDefaultConfig(master_t *config)
 #else
     config->rxConfig.serialrx_provider = 0;
 #endif
+    config->rxConfig.rx_spi_protocol = RX_SPI_DEFAULT_PROTOCOL;
     config->rxConfig.sbus_inversion = 1;
     config->rxConfig.spektrum_sat_bind = 0;
     config->rxConfig.spektrum_sat_bind_autoreset = 1;
@@ -720,26 +726,28 @@ void activateConfig(void)
 
 void validateAndFixConfig(void)
 {
-    if (!(featureConfigured(FEATURE_RX_PARALLEL_PWM) || featureConfigured(FEATURE_RX_PPM) || featureConfigured(FEATURE_RX_SERIAL) || featureConfigured(FEATURE_RX_MSP))) {
+    if (!(featureConfigured(FEATURE_RX_PARALLEL_PWM) || featureConfigured(FEATURE_RX_PPM) || featureConfigured(FEATURE_RX_SERIAL) || featureConfigured(FEATURE_RX_MSP) || featureConfigured(FEATURE_RX_SPI))) {
         featureSet(DEFAULT_RX_FEATURE);
     }
 
     if (featureConfigured(FEATURE_RX_PPM)) {
-        featureClear(FEATURE_RX_PARALLEL_PWM);
+        featureClear(FEATURE_RX_SERIAL | FEATURE_RX_PARALLEL_PWM | FEATURE_RX_MSP | FEATURE_RX_SPI);
     }
 
     if (featureConfigured(FEATURE_RX_MSP)) {
-        featureClear(FEATURE_RX_SERIAL);
-        featureClear(FEATURE_RX_PARALLEL_PWM);
-        featureClear(FEATURE_RX_PPM);
+        featureClear(FEATURE_RX_SERIAL | FEATURE_RX_PARALLEL_PWM | FEATURE_RX_PPM | FEATURE_RX_SPI);
     }
 
     if (featureConfigured(FEATURE_RX_SERIAL)) {
-        featureClear(FEATURE_RX_PARALLEL_PWM);
-        featureClear(FEATURE_RX_PPM);
+        featureClear(FEATURE_RX_PARALLEL_PWM | FEATURE_RX_MSP | FEATURE_RX_PPM | FEATURE_RX_SPI);
+    }
+
+    if (featureConfigured(FEATURE_RX_SPI)) {
+        featureClear(FEATURE_RX_SERIAL | FEATURE_RX_PARALLEL_PWM | FEATURE_RX_PPM | FEATURE_RX_MSP);
     }
 
     if (featureConfigured(FEATURE_RX_PARALLEL_PWM)) {
+        featureClear(FEATURE_RX_SERIAL | FEATURE_RX_MSP | FEATURE_RX_PPM | FEATURE_RX_SPI);
 #if defined(STM32F10X)
         // rssi adc needs the same ports
         featureClear(FEATURE_RSSI_ADC);
@@ -758,6 +766,20 @@ void validateAndFixConfig(void)
         featureClear(FEATURE_SOFTSERIAL);
     }
 
+#ifdef USE_SOFTSPI
+    if (featureConfigured(FEATURE_SOFTSPI)) {
+        featureClear(FEATURE_RX_PPM | FEATURE_RX_PARALLEL_PWM | FEATURE_SOFTSERIAL | FEATURE_VBAT);
+#if defined(STM32F10X)
+        featureClear(FEATURE_LED_STRIP);
+        // rssi adc needs the same ports
+        featureClear(FEATURE_RSSI_ADC);
+        // current meter needs the same ports
+        if (masterConfig.batteryConfig.currentMeterType == CURRENT_SENSOR_ADC) {
+            featureClear(FEATURE_CURRENT_METER);
+        }
+#endif
+    }
+#endif
 
 #if defined(LED_STRIP) && (defined(USE_SOFTSERIAL1) || defined(USE_SOFTSERIAL2))
     if (featureConfigured(FEATURE_SOFTSERIAL) && (
diff --git a/src/main/drivers/bus_spi.c b/src/main/drivers/bus_spi.c
index c86fdbdb48..aeff433585 100644
--- a/src/main/drivers/bus_spi.c
+++ b/src/main/drivers/bus_spi.c
@@ -99,13 +99,17 @@ SPIDevice spiDeviceByInstance(SPI_TypeDef *instance)
 
 void spiInitDevice(SPIDevice device)
 {
-    SPI_InitTypeDef spiInit;
-
     spiDevice_t *spi = &(spiHardwareMap[device]);
 
 #ifdef SDCARD_SPI_INSTANCE
-    if (spi->dev == SDCARD_SPI_INSTANCE)
-        spi->sdcard = true;
+    if (spi->dev == SDCARD_SPI_INSTANCE) {
+        spi->leadingEdge = true;
+    }
+#endif
+#ifdef RX_SPI_INSTANCE
+    if (spi->dev == RX_SPI_INSTANCE) {
+        spi->leadingEdge = true;
+    }
 #endif
 
     // Enable SPI clock
@@ -121,21 +125,24 @@ void spiInitDevice(SPIDevice device)
     IOConfigGPIOAF(IOGetByTag(spi->miso), SPI_IO_AF_CFG, spi->af);
     IOConfigGPIOAF(IOGetByTag(spi->mosi), SPI_IO_AF_CFG, spi->af);
 
-    if (spi->nss)
+    if (spi->nss) {
         IOConfigGPIOAF(IOGetByTag(spi->nss), SPI_IO_CS_CFG, spi->af);
+    }
 #endif
 #if defined(STM32F10X)
     IOConfigGPIO(IOGetByTag(spi->sck), SPI_IO_AF_SCK_CFG);
     IOConfigGPIO(IOGetByTag(spi->miso), SPI_IO_AF_MISO_CFG);
     IOConfigGPIO(IOGetByTag(spi->mosi), SPI_IO_AF_MOSI_CFG);
 
-    if (spi->nss)
+    if (spi->nss) {
         IOConfigGPIO(IOGetByTag(spi->nss), SPI_IO_CS_CFG);
+    }
 #endif
 
-            // Init SPI hardware
+    // Init SPI hardware
     SPI_I2S_DeInit(spi->dev);
 
+    SPI_InitTypeDef spiInit;
     spiInit.SPI_Mode = SPI_Mode_Master;
     spiInit.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
     spiInit.SPI_DataSize = SPI_DataSize_8b;
@@ -144,11 +151,10 @@ void spiInitDevice(SPIDevice device)
     spiInit.SPI_CRCPolynomial = 7;
     spiInit.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;
 
-    if (spi->sdcard) {
+    if (spi->leadingEdge) {
         spiInit.SPI_CPOL = SPI_CPOL_Low;
         spiInit.SPI_CPHA = SPI_CPHA_1Edge;
-    }
-    else {
+    } else {
         spiInit.SPI_CPOL = SPI_CPOL_High;
         spiInit.SPI_CPHA = SPI_CPHA_2Edge;
     }
@@ -161,8 +167,10 @@ void spiInitDevice(SPIDevice device)
     SPI_Init(spi->dev, &spiInit);
     SPI_Cmd(spi->dev, ENABLE);
 
-    if (spi->nss)
+    if (spi->nss) {
+        // Drive NSS high to disable connected SPI device.
         IOHi(IOGetByTag(spi->nss));
+    }
 }
 
 bool spiInit(SPIDevice device)
diff --git a/src/main/drivers/bus_spi.h b/src/main/drivers/bus_spi.h
index 3d00aee52f..3925cdce81 100644
--- a/src/main/drivers/bus_spi.h
+++ b/src/main/drivers/bus_spi.h
@@ -67,7 +67,7 @@ typedef struct SPIDevice_s {
     rccPeriphTag_t rcc;
     uint8_t af;
     volatile uint16_t errorCount;
-    bool sdcard;
+    bool leadingEdge;
 } spiDevice_t;
 
 bool spiInit(SPIDevice device);
diff --git a/src/main/rx/rx_spi.c b/src/main/rx/rx_spi.c
index 44b6c13fe1..c7397fbfd9 100644
--- a/src/main/rx/rx_spi.c
+++ b/src/main/rx/rx_spi.c
@@ -46,7 +46,7 @@ static protocolInitPtr protocolInit;
 static protocolDataReceivedPtr protocolDataReceived;
 static protocolSetRcDataFromPayloadPtr protocolSetRcDataFromPayload;
 
-STATIC_UNIT_TESTED uint16_t rxSpiReadRawRC(rxRuntimeConfig_t *rxRuntimeConfig, uint8_t channel)
+STATIC_UNIT_TESTED uint16_t rxSpiReadRawRC(const rxRuntimeConfig_t *rxRuntimeConfig, uint8_t channel)
 {
     BUILD_BUG_ON(NRF24L01_MAX_PAYLOAD_SIZE > RX_SPI_MAX_PAYLOAD_SIZE);
     if (channel >= rxRuntimeConfig->channelCount) {