From 35cfff068047de01aab1213324fb423092c4289f Mon Sep 17 00:00:00 2001
From: Brian Cully <bjc@kublai.com>
Date: Wed, 26 Oct 2022 07:28:06 -0400
Subject: spi: use 1.5mhz, tweak some logging

---
 src/cirque.rs | 24 ++++++++++++++----------
 src/main.rs   | 15 ++++++++++++---
 2 files changed, 26 insertions(+), 13 deletions(-)

diff --git a/src/cirque.rs b/src/cirque.rs
index af2ce6f..69f9903 100644
--- a/src/cirque.rs
+++ b/src/cirque.rs
@@ -69,6 +69,9 @@ enum RAPAddress {
     ProductID = 0x1f,
 }
 
+// TODO: figure out how to use the
+// embedded_hal::blocking::spi::{Transfer, Write} traits instead of
+// doing it ourselves.
 trait SPIWriter<Word>: spi::FullDuplex<Word> {
     fn write(&mut self, buf: &[Word]) -> nb::Result<(), Self::Error>;
     fn transfer(&mut self, buf: &mut [Word]) -> nb::Result<(), Self::Error>;
@@ -81,15 +84,16 @@ where
 {
     fn write(&mut self, buf: &[Word]) -> nb::Result<(), Self::Error> {
         for i in buf {
-            self.send(*i)?;
+            nb::block!(self.send(*i))?;
+            _ = nb::block!(self.read())?;
         }
         Ok(())
     }
 
     fn transfer(&mut self, buf: &mut [Word]) -> nb::Result<(), Self::Error> {
         for i in buf.iter_mut() {
-            self.send(*i)?;
-            *i = self.read()?;
+            nb::block!(self.send(*i))?;
+            *i = nb::block!(self.read())?;
         }
         Ok(())
     }
@@ -141,7 +145,7 @@ where
 {
     pub fn new<S>(cs_pin: C, dr_pin: D, spi: &mut S, clocks: Clocks) -> nb::Result<Self, S::Error>
     where
-        S: embedded_hal::spi::FullDuplex<u8>,
+        S: spi::FullDuplex<u8>,
     {
         let sysclk_speed = clocks.sysclk().raw();
         let mut res = Self {
@@ -155,7 +159,7 @@ where
 
     fn init<S>(&mut self, spi: &mut S) -> nb::Result<(), S::Error>
     where
-        S: embedded_hal::spi::FullDuplex<u8>,
+        S: spi::FullDuplex<u8>,
     {
         self.cs_pin.set_high().ok();
         self.clear_flags(spi)?;
@@ -174,7 +178,7 @@ where
 
     fn clear_flags<S>(&mut self, spi: &mut S) -> nb::Result<(), S::Error>
     where
-        S: embedded_hal::spi::FullDuplex<u8>,
+        S: spi::FullDuplex<u8>,
     {
         self.wr(spi, 0x02, 0x00)?;
 
@@ -185,7 +189,7 @@ where
 
     pub fn poll<S>(&mut self, spi: &mut S) -> nb::Result<TouchData, S::Error>
     where
-        S: embedded_hal::spi::FullDuplex<u8>,
+        S: spi::FullDuplex<u8>,
     {
         if self.dr_pin.is_high().unwrap_or(false) {
             self.read_coords(spi)
@@ -196,7 +200,7 @@ where
 
     fn read_coords<S>(&mut self, spi: &mut S) -> nb::Result<TouchData, S::Error>
     where
-        S: embedded_hal::spi::FullDuplex<u8>,
+        S: spi::FullDuplex<u8>,
     {
         let mut buf: [u8; 6] = [0xfc; 6];
         self.rd(spi, 0x12, &mut buf)?;
@@ -222,7 +226,7 @@ where
 
     fn rd<S>(&mut self, spi: &mut S, cmd: u8, buf: &mut [u8]) -> nb::Result<(), S::Error>
     where
-        S: embedded_hal::spi::FullDuplex<u8>,
+        S: spi::FullDuplex<u8>,
     {
         let cmd = cmd | READ_MASK;
         self.cs_pin.set_low().ok();
@@ -236,7 +240,7 @@ where
 
     fn wr<S>(&mut self, spi: &mut S, addr: u8, data: u8) -> nb::Result<(), S::Error>
     where
-        S: embedded_hal::spi::FullDuplex<u8>,
+        S: spi::FullDuplex<u8>,
     {
         let cmd = addr | WRITE_MASK;
         self.cs_pin.set_low().ok();
diff --git a/src/main.rs b/src/main.rs
index 3c13e54..02812bd 100755
--- a/src/main.rs
+++ b/src/main.rs
@@ -65,7 +65,7 @@ fn main() -> ! {
 
     log::init(tx);
 
-    logln!("luchie started!");
+    logln!("luchie starting…");
 
     // cirque spi connections to spi1:
     //
@@ -75,6 +75,7 @@ fn main() -> ! {
     // pa6 - miso1
     // pa7 - mosi1
 
+    logln!("init trackpad");
     let dr_pin = gpiob.pb0;
     let sck_pin = gpioa.pa5.into_alternate_push_pull(&mut gpioa.crl);
     let miso_pin = gpioa.pa6;
@@ -85,11 +86,18 @@ fn main() -> ! {
         (sck_pin, miso_pin, mosi_pin),
         &mut afio.mapr,
         spi::MODE_1,
-        1.MHz(),
+        1_500_000.Hz(),
         clocks,
     );
-    let mut cirque = Cirque::new(cs_pin, dr_pin, &mut spi, clocks).expect("couldn't init touch pad");
+    let mut cirque = match Cirque::new(cs_pin, dr_pin, &mut spi, clocks) {
+        Ok(c) => c,
+        Err(e) => {
+            logln!("err: {:?}", e);
+            panic!();
+        }
+    };
 
+    logln!("init usb");
     // BluePill board has a pull-up resistor on the D+ line.
     // Pull the D+ pin down to send a RESET condition to the USB bus.
     // This forced reset is needed only for development, without it host
@@ -116,6 +124,7 @@ fn main() -> ! {
         .device_class(USB_CLASS_CDC)
         .build();
 
+    logln!("luchie started!");
     loop {
         logln!(".");
 
-- 
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