From 32ec29ccce52acc42a2509a484454e7ec43e89e3 Mon Sep 17 00:00:00 2001
From: borisbstyle <dreambb1982@gmail.com>
Date: Sun, 23 Oct 2016 00:35:26 +0200
Subject: [PATCH] Fix unhandled SPI4 // Size reduction F1

---
 src/main/common/filter.c   | 2 +-
 src/main/common/filter.h   | 8 ++++++--
 src/main/drivers/bus_spi.c | 7 +++++++
 3 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/src/main/common/filter.c b/src/main/common/filter.c
index e291ae25c9..420418e0d3 100644
--- a/src/main/common/filter.c
+++ b/src/main/common/filter.c
@@ -270,7 +270,7 @@ int16_t firFilterInt16Get(const firFilter_t *filter, int index)
 }
 
 void initFirFilter(firFilterState_t *filter, uint8_t gyroSoftLpfHz, uint16_t targetLooptime) {
-    filter->targetCount = constrain(lrintf((1.0f / (0.000001f * (float)targetLooptime)) / gyroSoftLpfHz), 1, MAX_DENOISE_WINDOW_SIZE);
+    filter->targetCount = constrain(lrintf((1.0f / (0.000001f * (float)targetLooptime)) / gyroSoftLpfHz), 1, MAX_FIR_WINDOW_SIZE);
 }
 
 /* prototype function for denoising of signal by dynamic moving average. Mainly for test purposes */
diff --git a/src/main/common/filter.h b/src/main/common/filter.h
index 91057e3aa4..4db6999e1c 100644
--- a/src/main/common/filter.h
+++ b/src/main/common/filter.h
@@ -15,7 +15,11 @@
  * along with Cleanflight.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#define MAX_DENOISE_WINDOW_SIZE 120
+#ifdef STM32F10X
+#define MAX_FIR_WINDOW_SIZE 60
+#else
+#define MAX_FIR_WINDOW_SIZE 120
+#endif
 
 typedef struct pt1Filter_s {
     float state;
@@ -34,7 +38,7 @@ typedef struct firFilterState_s {
     int targetCount;
     int index;
     float movingSum;
-    float state[MAX_DENOISE_WINDOW_SIZE];
+    float state[MAX_FIR_WINDOW_SIZE];
 } firFilterState_t;
 
 typedef enum {
diff --git a/src/main/drivers/bus_spi.c b/src/main/drivers/bus_spi.c
index aeff433585..8e62e09957 100644
--- a/src/main/drivers/bus_spi.c
+++ b/src/main/drivers/bus_spi.c
@@ -199,6 +199,13 @@ bool spiInit(SPIDevice device)
         return true;
 #else
         break;
+#endif
+    case SPIDEV_4:
+#if defined(USE_SPI_DEVICE_4)
+        spiInitDevice(device);
+        return true;
+#else
+        break;
 #endif
     }
     return false;