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Mar 19th, 2018
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  1. p.SPI1.cr1.write(|w| unsafe {
  2. w.br().bits(0b100) // CLK / 32 prescaler
  3. .ssi().clear_bit() // NSS
  4. .ssm().set_bit() // Software chip select
  5. .mstr().set_bit() // Master SPI mode
  6. .cpol().clear_bit() // CK to 0 when idle
  7. .lsbfirst().clear_bit() // MSB first
  8. .dff().set_bit() // 16 bit frames
  9. .bidimode().clear_bit() // 2-line unidirectional mode
  10. .bidioe().set_bit() // Enable bidirectional transmit mode only
  11. });
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