ONBOARD_MEMS_TYPE=LIS2DH12

firmware/config/boards/hellen/alphax-4chan/board.mk

@@ -36,3 +36,4 @@ $(error Unsupported PROJECT_CPU [$(PROJECT_CPU)])
 endif
 
 DDEFS += -DHW_HELLEN_4CHAN=1
+ONBOARD_MEMS_TYPE=LIS2DH12

firmware/config/boards/hellen/alphax-8chan/board.mk

@@ -30,3 +30,5 @@ DDEFS += -DSTATIC_BOARD_ID=STATIC_BOARD_ID_ALPHAX_8CHAN
 
 SHORT_BOARD_NAME=alphax-8chan
 DDEFS += -DHW_HELLEN_8CHAN=1
+
+ONBOARD_MEMS_TYPE=LIS2DH12

firmware/config/boards/hellen/hellen-common.mk

@@ -16,3 +16,13 @@ DDEFS += -DHW_HELLEN=1
 ifeq ($(RAM_UNUSED_SIZE),)
     DDEFS += -DRAM_UNUSED_SIZE=100
 endif
+
+ifeq ($(ONBOARD_MEMS_TYPE),LIS2DH12)
+ # Same spi is used for SD and Accelerometer
+ DDEFS += -DMMC_USE_MUTUAL_EXCLUSION=TRUE
+
+ # This board has some Accelerometer onboard
+ DDEFS += -DEFI_ONBOARD_MEMS=TRUE
+ EFI_ONBOARD_MEMS_LIS2DH12 = yes
+ DDEFS += -DLSM303AGR_USE_SPI=TRUE -DLSM303AGR_USE_I2C=FALSE -DLSM303AGR_SHARED_SPI=TRUE
+endif

firmware/config/boards/hellen/hellen-honda-k/board_configuration.cpp

@@ -146,9 +146,7 @@ void setBoardDefaultConfiguration() {
     setTPS1Calibration(100, 650);
 	hellenWbo();
 
-	/* accel SPI is shared with SD card SPI */
-	engineConfiguration->accelerometerSpiDevice = SPI_DEVICE_1;
-	engineConfiguration->accelerometerCsPin = Gpio::H_SPI1_CS2;
+  setAccelerometerSpi();
 }
 
 static Gpio OUTPUTS[] = {

firmware/config/boards/hellen_meta.h

@@ -249,6 +249,12 @@ static void setHellenSdCardSpi3NoCS() {
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wunused-function"
 
+static void setAccelerometerSpi() {
+	/* accelerometer SPI is shared with SD card SPI on mm144 */
+	engineConfiguration->accelerometerSpiDevice = SPI_DEVICE_1;
+	engineConfiguration->accelerometerCsPin = Gpio::H_SPI1_CS2;
+}
+
 static void setHellenSdCardSpi1() {
     setHellenSdCardSpi1NoCS();
     engineConfiguration->sdCardCsPin = Gpio::H_SPI1_CS1;