gpio: Add AD7172 phy gpio init

- Will not function on rev0_2 kirdy due to wrong hardware connection

src/device/boot.rs

@@ -41,7 +41,7 @@ pub fn bootup(
 
     sys_timer::setup(core_perif.SYST, clocks);
 
-    let (_eth_pins, usb, current_source_phy, max1968_phy) = gpio::setup(
+    let (_eth_pins, usb, current_source_phy, _ad7172_phy, max1968_phy) = gpio::setup(
         clocks,
         perif.TIM4,
         perif.GPIOA,
@@ -51,6 +51,7 @@ pub fn bootup(
         perif.GPIOG,
         perif.SPI1,
         perif.SPI2,
+        perif.SPI3,
         perif.OTG_FS_GLOBAL,
         perif.OTG_FS_DEVICE,
         perif.OTG_FS_PWRCLK,

src/device/gpio.rs

@@ -2,12 +2,13 @@ use crate::laser_diode::current_sources::{self, CurrentSourcePhy};
 use crate::laser_diode::max5719;
 use crate::thermostat::ad5680;
 use crate::thermostat::max1968::{self, MAX1968PinSet, MAX1968Phy, PWM_FREQ_KHZ};
+use crate::thermostat::ad7172;
 use stm32_eth::EthPins;
 use stm32f4xx_hal::{
     gpio::{gpioa::*, gpiob::*, gpioc::*, gpiog::*, GpioExt, Input},
     otg_fs::USB,
     pac::{
-        GPIOA, GPIOB, GPIOC, GPIOD, GPIOG, OTG_FS_DEVICE, OTG_FS_GLOBAL, OTG_FS_PWRCLK, SPI1, SPI2,
+        GPIOA, GPIOB, GPIOC, GPIOD, GPIOG, OTG_FS_DEVICE, OTG_FS_GLOBAL, OTG_FS_PWRCLK, SPI1, SPI2, SPI3,
         TIM4,
     },
     rcc::Clocks,
@@ -28,6 +29,7 @@ pub fn setup(
     gpiog: GPIOG,
     spi1: SPI1,
     spi2: SPI2,
+    spi3: SPI3,
     otg_fs_global: OTG_FS_GLOBAL,
     otg_fs_device: OTG_FS_DEVICE,
     otg_fs_pwrclk: OTG_FS_PWRCLK,
@@ -35,6 +37,7 @@ pub fn setup(
     EthernetPins,
     USB,
     CurrentSourcePhy<current_sources::Channel0>,
+    ad7172::AdcPhy,
     MAX1968Phy<max1968::Channel0>,
     // thermostat_phy
 ) {
@@ -118,5 +121,19 @@ pub fn setup(
         max_i_neg: max_i_neg0,
     });
 
-    (eth_pins, usb, current_source_phy, max1968_phy)
+    let ad7172_phy = ad7172::Adc::new(
+        Spi::new(spi3,
+            (
+                gpioc.pc10.into_alternate(),
+                gpioc.pc11.into_alternate(),
+                gpioc.pc12.into_alternate(),
+            ),
+            ad7172::SPI_MODE,
+            ad7172::SPI_CLOCK_MHZ.convert(),
+            &clocks
+        ),
+        gpiod.pd0.into_push_pull_output(),
+    ).unwrap();
+
+    (eth_pins, usb, current_source_phy, ad7172_phy, max1968_phy)
 }

src/thermostat/ad7172/adc.rs

@@ -1,8 +1,14 @@
 use core::fmt;
 use log::{info, warn};
-use stm32f4xx_hal::hal::{
+use stm32f4xx_hal::
+    {
+        spi::{Spi, TransferModeNormal},
+        pac::SPI3,
+        gpio::{PC10, PC11, PC12, PD0, Alternate, Output, PushPull},
+        hal::{
             blocking::spi::Transfer,
             digital::v2::OutputPin,
+        },
 };
 use uom::si::{
     f64::ElectricPotential,
@@ -23,7 +29,16 @@ pub struct Adc<SPI: Transfer<u8>, NSS: OutputPin> {
     checksum_mode: ChecksumMode,
 }
 
+type AdcSpi = Spi<SPI3, (PC10<Alternate<6>>, PC11<Alternate<6>>, PC12<Alternate<6>>), TransferModeNormal>;
+type AdcNss = PD0<Output<PushPull>>;
+pub type AdcPhy = Adc<AdcSpi, AdcNss>;
+
 impl<SPI: Transfer<u8, Error = E>, NSS: OutputPin, E: fmt::Debug> Adc<SPI, NSS> {
+    #[deprecated(note=
+        "To be removed when rev0_3 has arrived.
+        Rev0_2 has wrong SPI hardware connection bug.
+        AD7172-2 is not accessible.
+        ")]
     pub fn new(spi: SPI, mut nss: NSS) -> Result<Self, SPI::Error> {
         let _ = nss.set_high();
         let mut adc = Adc {