From a78a254a527e09fdd8ab54d5fee9d0049ffdb2d4 Mon Sep 17 00:00:00 2001
From: Daniel Fekete <danieleff@gmail.com>
Date: Thu, 15 Jun 2017 06:04:37 +0200
Subject: [PATCH] spi: Move spi_ff_buffer into the class

---
 STM32/libraries/SPI/src/SPI.cpp | 4 +---
 STM32/libraries/SPI/src/SPI.h   | 3 +++
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/STM32/libraries/SPI/src/SPI.cpp b/STM32/libraries/SPI/src/SPI.cpp
index 52a6a2a..0a98a4a 100644
--- a/STM32/libraries/SPI/src/SPI.cpp
+++ b/STM32/libraries/SPI/src/SPI.cpp
@@ -4,8 +4,6 @@
 
 #include "stm32_dma.h"
 
-static uint8_t spi_ff_buffer = 0XFF;
-
 #if defined(MOSI) || defined(MISO) || defined(SCK)
 	SPIClass SPI(SPI1, MOSI, MISO, SCK);
 #else
@@ -191,7 +189,7 @@ uint8_t SPIClass::dmaTransfer(uint8_t *transmitBuf, uint8_t *receiveBuf, uint16_
     #endif
 
 	if (!transmitBuf) {
-		transmitBuf = &spi_ff_buffer;
+		transmitBuf = (uint8_t*)&repeatTransmitData;
 		hdma_spi_tx.Init.MemInc = DMA_MINC_DISABLE;
 	} else {
 		//Need to change the MINC mode since dmaSend with MINC 0 or Null transmitBuf may have been called last
diff --git a/STM32/libraries/SPI/src/SPI.h b/STM32/libraries/SPI/src/SPI.h
index 0cf477d..e792338 100644
--- a/STM32/libraries/SPI/src/SPI.h
+++ b/STM32/libraries/SPI/src/SPI.h
@@ -102,6 +102,9 @@ class SPIClass {
 
 
     SPI_HandleTypeDef spiHandle = {};
+
+    uint16_t repeatTransmitData = 0XFFFF;
+
   private:
     uint32_t apb_freq = 0;