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Update SPI.h #1

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Update SPI.h #1

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19 changes: 12 additions & 7 deletions SPI.h
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Expand Up @@ -453,12 +453,7 @@ class SPIClass {
}
inTransactionFlag = 1;
#endif
if (SPI0_CTAR0 != settings.ctar) {
SPI0_MCR = SPI_MCR_MDIS | SPI_MCR_HALT | SPI_MCR_PCSIS(0x1F);
SPI0_CTAR0 = settings.ctar;
SPI0_CTAR1 = settings.ctar| SPI_CTAR_FMSZ(8);
SPI0_MCR = SPI_MCR_MSTR | SPI_MCR_PCSIS(0x1F);
}
applySettings(settings);
}

// Write to the SPI bus (MOSI pin) and also receive (MISO pin)
Expand Down Expand Up @@ -488,7 +483,17 @@ class SPIClass {
while (!(SPSR & _BV(SPIF))) ;
*p = SPDR;
}


inline static void applySettings(const SPISettings& settings)
{
if (SPI0_CTAR0 != settings.ctar) {
SPI0_MCR = SPI_MCR_MDIS | SPI_MCR_HALT | SPI_MCR_PCSIS(0x1F);
SPI0_CTAR0 = settings.ctar;
SPI0_CTAR1 = settings.ctar| SPI_CTAR_FMSZ(8);
SPI0_MCR = SPI_MCR_MSTR | SPI_MCR_PCSIS(0x1F);
}
}

// After performing a group of transfers and releasing the chip select
// signal, this function allows others to access the SPI bus
inline static void endTransaction(void) {
Expand Down