From a810919b65b14e0a3e16da8f85a8992eb9a24efe Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20=C4=8Cejchan?= <daniel.cejchan@prusa3d.cz>
Date: Fri, 20 Sep 2024 15:59:25 +0200
Subject: [PATCH] Accelerometer: Fix initial garbage on CLK

CS was triggered before the SPI was
enabled on the MCU,
resulting in the CLK pin floating for a while.

The accelerometer was ignoring the first command,
which resulted in the "not detected" error.

BFW-6057
---
 src/hw/SparkFunLIS2DH.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/hw/SparkFunLIS2DH.cpp b/src/hw/SparkFunLIS2DH.cpp
index 59f042f4ca..3df98867e0 100644
--- a/src/hw/SparkFunLIS2DH.cpp
+++ b/src/hw/SparkFunLIS2DH.cpp
@@ -149,6 +149,10 @@ LIS2DHCore::LIS2DHCore(const buddy::hw::OutputPin &chip_sel_pin)
 }
 
 status_t LIS2DHCore::beginCore(void) {
+    // Enable SPI now -> make sure the clock is not floating before we do ChipSelect
+    // BFW-6057
+    __HAL_SPI_ENABLE(&SPI_HANDLE_FOR(accelerometer));
+
     // Check the ID register to determine if we have an accelerometer
     uint8_t readCheck;
     readRegister(&readCheck, LIS2DH_WHO_AM_I);