diff --git a/firmware/hw_layer/mc33816.cpp b/firmware/hw_layer/mc33816.cpp
index 71ef059953..75864e2cd9 100644
--- a/firmware/hw_layer/mc33816.cpp
+++ b/firmware/hw_layer/mc33816.cpp
@@ -7,23 +7,69 @@
  * @author Andrey Belomutskiy, (c) 2012-2019
  */
 
-#include "efifeatures.h"
-#include "mc33816.h"
+#include "global.h"
 
 #if EFI_MC33816
 
+#include "mc33816.h"
+#include "engine_configuration.h"
+#include "efi_gpio.h"
+#include "hardware.h"
+
+EXTERN_CONFIG;
+
+static OutputPin chipSelect;
+
+static SPIConfig spiCfg = { .circular = false,
+		.end_cb = NULL,
+		.ssport = NULL,
+		.sspad = 0,
+		.cr1 = SPI_CR1_MSTR |
+//SPI_CR1_BR_1 // 5MHz
+		SPI_CR1_CPHA | SPI_CR1_BR_0 | SPI_CR1_BR_1 | SPI_CR1_BR_2,
+		.cr2 = 0};
+
+static SPIDriver *driver;
+
+
 static void showStats() {
 
 }
 
 static void sentByte(int param) {
-
+	spiSelect(driver);
+	spiSend(driver, 1, &param);
+	spiUnselect(driver);
 }
 
 void initMc33816() {
-	if (engineConfiguration->mc33816_cs == GPIO_UNASSIGNED)
+	// default spi3mosiPin PB5
+	// default spi3misoPin PB4
+	// default spi3sckPin  PB3
+	// ideally disable isSdCardEnabled since it's on SPI3
+
+	// uncomment thid to hard-code something
+	//CONFIG(mc33816_cs) = GPIOD_7;
+
+	if (CONFIG(mc33816_cs) == GPIO_UNASSIGNED)
 		return;
 
+	chipSelect.initPin("mc33 CS", engineConfiguration->mc33816_cs /*, &engineConfiguration->csPinMode*/);
+
+	spiCfg.ssport = getHwPort("hip", CONFIG(mc33816_cs));
+	spiCfg.sspad = getHwPin("hip", CONFIG(mc33816_cs));
+
+	// hard-coded for now, just resolve the conflict with SD card!
+	engineConfiguration->mc33816spiDevice = SPI_DEVICE_3;
+
+	driver = getSpiDevice(engineConfiguration->mc33816spiDevice);
+	if (driver == NULL) {
+		// error already reported
+		return;
+	}
+
+	spiStart(driver, &spiCfg);
+
 	addConsoleAction("mc33_stats", showStats);
 
 	addConsoleActionI("mc33_send", sentByte);
diff --git a/firmware/hw_layer/mc33816.h b/firmware/hw_layer/mc33816.h
index 4b8baafb99..6c7334b05c 100644
--- a/firmware/hw_layer/mc33816.h
+++ b/firmware/hw_layer/mc33816.h
@@ -8,6 +8,6 @@
 #ifndef HW_LAYER_MC33816_H_
 #define HW_LAYER_MC33816_H_
 
-void initMc33816();
+void initMc33816(void);
 
 #endif /* HW_LAYER_MC33816_H_ */