From db2720dfa80f67c0b0e11eb7f25ca4503bf3c633 Mon Sep 17 00:00:00 2001
From: rusefi <arro239+rusefi@gmail.com>
Date: Thu, 17 Aug 2017 09:09:30 -0400
Subject: [PATCH] #473

---
 firmware/hw_layer/mems.cpp | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/firmware/hw_layer/mems.cpp b/firmware/hw_layer/mems.cpp
index e1c86ced57..9c4d9e5a2b 100644
--- a/firmware/hw_layer/mems.cpp
+++ b/firmware/hw_layer/mems.cpp
@@ -2,6 +2,7 @@
  * @file mems.cpp
  *
  * stm32f4discovery has MEMS LIS302DL
+ * www.st.com/resource/en/datasheet/lis302dl.pdf
  *
  * SPI1
  * LIS302DL_SPI_SCK PA5
@@ -22,6 +23,11 @@ EXTERN_ENGINE;
 void initMemsPins(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
 	engineConfiguration->LIS302DLCsPin = GPIOE_3;
 	boardConfiguration->is_enabled_spi_1 = true;
+
+	// stm32f4discovery defaults
+	boardConfiguration->spi1mosiPin = GPIOA_7;
+	boardConfiguration->spi1misoPin = GPIOA_6;
+	boardConfiguration->spi1sckPin = GPIOA_5;
 }
 
 #if EFI_MEMS || defined(__DOXYGEN__)
@@ -42,8 +48,8 @@ void initMems(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
 
 
 	/* LIS302DL initialization.*/
-	lis302dlWriteRegister(spip, LIS302DL_CTRL_REG1, 0x43);
-	lis302dlWriteRegister(spip, LIS302DL_CTRL_REG2, 0x00);
+	lis302dlWriteRegister(spip, LIS302DL_CTRL_REG1, 0x47); // enable device, enable XYZ
+	lis302dlWriteRegister(spip, LIS302DL_CTRL_REG2, 0x00); // 4 wire mode
 	lis302dlWriteRegister(spip, LIS302DL_CTRL_REG3, 0x00);
 
 	int8_t x = (int8_t)lis302dlReadRegister(spip, LIS302DL_OUTX);