[SPI] Remove duplicated byte order setting

Signed-off-by: Frederic Pillon <frederic.pillon@st.com>

Author: fpistm

libraries/SPI/src/SPI.cpp

@@ -78,7 +78,7 @@ void SPIClass::begin(uint8_t _pin)
   _spi.handle.State = HAL_SPI_STATE_RESET;
   spi_init(&_spi, spiSettings[idx].clk,
            spiSettings[idx].dMode,
-           spiSettings[idx].msb);
+           spiSettings[idx].bOrder);
   _CSPinConfig = _pin;
 #if __has_include("WiFi.h")
   // Wait wifi shield initialization.
@@ -115,11 +115,6 @@ void SPIClass::beginTransaction(uint8_t _pin, SPISettings settings)
   spiSettings[idx].clk = settings.clk;
   spiSettings[idx].dMode = settings.dMode;
   spiSettings[idx].bOrder = settings.bOrder;
-  if (spiSettings[idx].bOrder == MSBFIRST) {
-    spiSettings[idx].msb = MSBFIRST;
-  } else {
-    spiSettings[idx].msb = LSBFIRST;
-  }
 
   if ((_pin != CS_PIN_CONTROLLED_BY_USER) && (_spi.pin_ssel == NC)) {
     pinMode(_pin, OUTPUT);
@@ -128,7 +123,7 @@ void SPIClass::beginTransaction(uint8_t _pin, SPISettings settings)
 
   spi_init(&_spi, spiSettings[idx].clk,
            spiSettings[idx].dMode,
-           spiSettings[idx].msb);
+           spiSettings[idx].bOrder);
   _CSPinConfig = _pin;
 }
 
@@ -173,17 +168,11 @@ void SPIClass::setBitOrder(uint8_t _pin, BitOrder _bitOrder)
     return;
   }
 
-  if (MSBFIRST == _bitOrder) {
-    spiSettings[idx].msb = MSBFIRST;
-    spiSettings[idx].bOrder = MSBFIRST;
-  } else {
-    spiSettings[idx].msb = LSBFIRST;
-    spiSettings[idx].bOrder = LSBFIRST;
-  }
+  spiSettings[idx].bOrder = _bitOrder;
 
   spi_init(&_spi, spiSettings[idx].clk,
            spiSettings[idx].dMode,
-           spiSettings[idx].msb);
+           spiSettings[idx].bOrder);
 }
 
 /**
@@ -221,7 +210,7 @@ void SPIClass::setDataMode(uint8_t _pin, uint8_t _mode)
 
   spi_init(&_spi, spiSettings[idx].clk,
            spiSettings[idx].dMode,
-           spiSettings[idx].msb);
+           spiSettings[idx].bOrder);
 }
 
 /**
@@ -250,7 +239,7 @@ void SPIClass::setClockDivider(uint8_t _pin, uint8_t _divider)
 
   spi_init(&_spi, spiSettings[idx].clk,
            spiSettings[idx].dMode,
-           spiSettings[idx].msb);
+           spiSettings[idx].bOrder);
 }
 
 /**
@@ -281,7 +270,7 @@ byte SPIClass::transfer(uint8_t _pin, uint8_t data, SPITransferMode _mode)
     }
     spi_init(&_spi, spiSettings[idx].clk,
              spiSettings[idx].dMode,
-             spiSettings[idx].msb);
+             spiSettings[idx].bOrder);
     _CSPinConfig = _pin;
   }
 
@@ -328,11 +317,11 @@ uint16_t SPIClass::transfer16(uint8_t _pin, uint16_t data, SPITransferMode _mode
   if (_pin != _CSPinConfig) {
     spi_init(&_spi, spiSettings[idx].clk,
              spiSettings[idx].dMode,
-             spiSettings[idx].msb);
+             spiSettings[idx].bOrder);
     _CSPinConfig = _pin;
   }
 
-  if (spiSettings[idx].msb) {
+  if (spiSettings[idx].bOrder) {
     tmp = ((data & 0xff00) >> 8) | ((data & 0xff) << 8);
     data = tmp;
   }
@@ -347,7 +336,7 @@ uint16_t SPIClass::transfer16(uint8_t _pin, uint16_t data, SPITransferMode _mode
     digitalWrite(_pin, HIGH);
   }
 
-  if (spiSettings[idx].msb) {
+  if (spiSettings[idx].bOrder) {
     tmp = ((rx_buffer & 0xff00) >> 8) | ((rx_buffer & 0xff) << 8);
     rx_buffer = tmp;
   }
@@ -382,7 +371,7 @@ void SPIClass::transfer(uint8_t _pin, void *_buf, size_t _count, SPITransferMode
     }
     spi_init(&_spi, spiSettings[idx].clk,
              spiSettings[idx].dMode,
-             spiSettings[idx].msb);
+             spiSettings[idx].bOrder);
     _CSPinConfig = _pin;
   }
 
@@ -425,7 +414,7 @@ void SPIClass::transfer(byte _pin, void *_bufout, void *_bufin, size_t _count, S
     }
     spi_init(&_spi, spiSettings[idx].clk,
              spiSettings[idx].dMode,
-             spiSettings[idx].msb);
+             spiSettings[idx].bOrder);
     _CSPinConfig = _pin;
   }
 

libraries/SPI/src/SPI.h

@@ -69,12 +69,6 @@ class SPISettings {
     SPISettings(uint32_t clock, BitOrder bitOrder, uint8_t dataMode)
     {
       clk = clock;
-
-      if (bitOrder == MSBFIRST) {
-        msb = 1;
-      } else {
-        msb = 0;
-      }
       bOrder = bitOrder;
 
       if (SPI_MODE0 == dataMode) {
@@ -86,14 +80,12 @@ class SPISettings {
       } else if (SPI_MODE3 == dataMode) {
         dMode = SPI_MODE_3;
       }
-
     }
     SPISettings()
     {
       pinCS = -1;
       clk = SPI_SPEED_CLOCK_DEFAULT;
       bOrder = MSBFIRST;
-      msb = 1;
       dMode = SPI_MODE_0;
     }
   private:
@@ -106,7 +98,6 @@ class SPISettings {
     //SPI_MODE1             0                     1
     //SPI_MODE2             1                     0
     //SPI_MODE3             1                     1
-    uint8_t msb;        //set to 1 if msb first
     friend class SPIClass;
 };
 
@@ -279,7 +270,6 @@ class SPIClass {
           spiSettings[i].pinCS = -1;
           spiSettings[i].clk = SPI_SPEED_CLOCK_DEFAULT;
           spiSettings[i].bOrder = MSBFIRST;
-          spiSettings[i].msb = 1;
           spiSettings[i].dMode = SPI_MODE_0;
         }
       }
@@ -291,7 +281,6 @@ class SPIClass {
         spiSettings[i].pinCS = -1;
         spiSettings[i].clk = SPI_SPEED_CLOCK_DEFAULT;
         spiSettings[i].bOrder = MSBFIRST;
-        spiSettings[i].msb = 1;
         spiSettings[i].dMode = SPI_MODE_0;
       }
     }