nss pullup

examples/spi_slave.rs

@@ -4,7 +4,7 @@
 use panic_halt as _;
 
 use crate::hal::spi::{Mode, Phase, Polarity};
-use crate::hal::{pac, prelude::*};
+use crate::hal::{gpio::Pull, pac, prelude::*};
 use cortex_m::asm;
 use cortex_m_rt::entry;
 use stm32f4xx_hal as hal;
@@ -24,14 +24,21 @@ fn main() -> ! {
 
     let gpioa = p.GPIOA.split();
 
-    let sck = gpioa.pa5;
-    let miso = gpioa.pa6;
-    let mosi = gpioa.pa7;
+    let sck = gpioa.pa5.internal_resistor(Pull::Up);
+    let miso = gpioa.pa6.internal_resistor(Pull::Down);
+    let mosi = gpioa.pa7.internal_resistor(Pull::Down);
 
     // clock speed is determined by the master
-    let mut spi = p
-        .SPI1
-        .spi_slave((sck, miso, mosi, Some(gpioa.pa4.into())), MODE);
+    let nss = gpioa.pa4.internal_resistor(Pull::Up).into();
+    let mut spi = p.SPI1.spi_slave(
+        (
+            sck,
+            miso,
+            mosi,
+            Some(nss),
+        ),
+        MODE,
+    );
     // alternativelly you could use software `chip select`
     // let mut spi = SpiSlave::new(p.SPI1, (sck, miso, mosi, None), MODE);
     // spi.set_internal_nss(false);