Added alternative function for doing an SPI transfer.
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@ -290,6 +290,7 @@ void spi_disable(u32 spi);
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void spi_write(u32 spi, u16 data);
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void spi_send(u32 spi, u16 data);
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u16 spi_read(u32 spi);
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u16 spi_xfer(u32 spi, u16 data);
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void spi_set_bidirectional_mode(u32 spi);
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void spi_set_unidirectional_mode(u32 spi);
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void spi_set_bidirectional_receive_only_mode(u32 spi);
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@ -77,7 +77,7 @@ void spi_write(u32 spi, u16 data)
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void spi_send(u32 spi, u16 data)
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{
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/* wait for transfer finished */
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while (SPI_SR(spi) & SPI_SR_BSY );
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while (!(SPI_SR(spi) & SPI_SR_TXE ));
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/* Write data (8 or 16 bits, depending on DFF) into DR. */
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SPI_DR(spi) = data;
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@ -85,6 +85,20 @@ void spi_send(u32 spi, u16 data)
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u16 spi_read(u32 spi)
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{
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/* wait for transfer finished */
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while (!(SPI_SR(spi) & SPI_SR_RXNE ));
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/* Read the data (8 or 16 bits, depending on DFF bit) from DR. */
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return SPI_DR(spi);
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}
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u16 spi_xfer(u32 spi, u16 data)
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{
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spi_write(spi, data);
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/* wait for transfer finished */
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while (!(SPI_SR(spi) & SPI_SR_RXNE ));
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/* Read the data (8 or 16 bits, depending on DFF bit) from DR. */
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return SPI_DR(spi);
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}
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