move dmx2 -> dmx

bluepill-rs/src/dmx.rs

@@ -1,57 +1,142 @@
-use cortex_m::singleton;
+use stm32f1xx_hal::{afio, dma, gpio, pac, prelude::*, rcc, serial};
-use stm32f1xx_hal::{dma, pac, prelude::*, rcc, serial};
 
-const DMX_LEN_MAX: usize = 512;
 type TxDma = dma::TxDma<serial::Tx<pac::USART1>, dma::dma1::C4>;
 type DMXUniverse<const DMX_LEN: usize> = &'static mut [u8; DMX_LEN];
 type DMXTransfer<const DMX_LEN: usize> = dma::Transfer<dma::R, DMXUniverse<DMX_LEN>, TxDma>;
 
-pub enum DMX<const DMX_LEN: usize = DMX_LEN_MAX> {
+struct TxDMAIdle<const DMX_LEN: usize> {
-    Idle(Option<TxDma>, Option<DMXUniverse<DMX_LEN>>),
+    tx: TxDma,
-    Busy(Option<DMXTransfer<DMX_LEN>>),
+    buffer: DMXUniverse<DMX_LEN>,
 }
 
-impl<const DMX_LEN: usize> DMX<DMX_LEN> {
+struct TxDMABusy<const DMX_LEN: usize> {
-    pub fn new<PINS>(
+    transfer: DMXTransfer<DMX_LEN>,
-        mut serial: serial::Serial<pac::USART1, PINS>,
-        channel: dma::dma1::C4,
-        clocks: &rcc::Clocks,
-    ) -> Self
-    where
-        PINS: serial::Pins<pac::USART1>,
-    {
-        assert!(DMX_LEN <= DMX_LEN_MAX);
-
-        serial.reconfigure(250_000.bps(), &clocks).unwrap();
-
-        Self::Idle(Some(serial.tx.with_dma(channel)), None)
 }
 
-    pub fn send(&mut self, data: &[u8]) {
+enum TxDMA<const DMX_LEN: usize> {
-        if let Self::Busy(_) = self {
+    Idle(Option<TxDMAIdle<DMX_LEN>>),
+    Busy(Option<TxDMABusy<DMX_LEN>>),
+}
+
+impl<const DMX_LEN: usize> TxDMA<DMX_LEN> {
+    fn new(tx: TxDma, buffer: DMXUniverse<DMX_LEN>) -> Self {
+        TxDMA::Idle(Some(TxDMAIdle { tx, buffer }))
+    }
+
+    fn start_sending(&mut self, tx_universe: &[u8]) {
+        let TxDMA::Idle(idle) = self else {
+            return;
+        };
+
+        let Some(TxDMAIdle { tx, buffer }) = idle.take() else {
+            panic!();
+        };
+
+        buffer.copy_from_slice(tx_universe);
+        *self = TxDMA::Busy(Some(TxDMABusy {
+            transfer: tx.write(buffer),
+        }));
+    }
+
+    fn wait(&mut self) {
+        let TxDMA::Busy(busy) = self else {
+            return;
+        };
+
+        let Some(TxDMABusy { transfer }) = busy.take() else {
+            panic!();
+        };
+
+        let (buffer, tx) = transfer.wait();
+
+        *self = TxDMA::Idle(Some(TxDMAIdle { tx, buffer }));
+    }
+
+    fn is_idle(&mut self) -> bool {
+        match self {
+            TxDMA::Idle(_) => true,
+
+            TxDMA::Busy(busy) => {
+                let Some(TxDMABusy { transfer }) = busy.take() else {
+                    panic!();
+                };
+
+                let is_done = transfer.is_done();
+                busy.replace(TxDMABusy { transfer });
+                if is_done {
                     self.wait();
                 }
 
-        let Self::Idle(tx, txbuffer) = self else {
+                is_done
-            panic!("Broken DMX State!")
+            }
+        }
+    }
+}
+
+#[allow(clippy::upper_case_acronyms)]
+pub struct DMX<const DMX_LEN: usize> {
+    tx_universe: DMXUniverse<DMX_LEN>,
+    sender: TxDMA<DMX_LEN>,
+}
+
+impl<const DMX_LEN: usize> DMX<DMX_LEN> {
+    pub fn new(
+        mem: &'static mut [u8],
+        mut dma_channel: dma::dma1::C4,
+        pa9: gpio::PA9,
+        pa10: gpio::PA10,
+        acrh: &mut gpio::Cr<'A', true>,
+        mapr: &mut afio::MAPR,
+        clocks: &rcc::Clocks,
+    ) -> Self {
+        // use provided memory region
+        assert!(mem.len() >= DMX_LEN * 2);
+
+        let (tx_universe, tx_buffer) = {
+            let (tx_universe, rest) = mem.split_at_mut(DMX_LEN);
+            let (tx_buffer, _) = rest.split_at_mut(DMX_LEN);
+
+            let tx_universe: DMXUniverse<DMX_LEN> = tx_universe.try_into().unwrap();
+            let tx_buffer: DMXUniverse<DMX_LEN> = tx_buffer.try_into().unwrap();
+
+            (tx_universe, tx_buffer)
         };
 
-        let txbuffer = txbuffer.take().unwrap_or_else(|| {
+        // setup DMA1_CHANNEL4 interrupt on TransferComplete
-            let foo = singleton!(: [u8; DMX_LEN_MAX] = [0u8; DMX_LEN_MAX]).unwrap();
+        dma_channel.listen(dma::Event::TransferComplete);
-            (&mut foo[..DMX_LEN]).try_into().unwrap()
+        unsafe {
-        });
+            pac::CorePeripherals::steal()
-        let tx = tx.take().unwrap();
+                .NVIC
-
+                .set_priority(pac::Interrupt::DMA1_CHANNEL4, 1);
-        txbuffer.copy_from_slice(&data[..DMX_LEN]);
-        *self = Self::Busy(Some(tx.write(txbuffer)));
         }
 
-    pub fn wait(&mut self) {
+        // Serial config
-        let Self::Busy(xfer) = self else { return };
+        let serial = serial::Serial::new(
+            unsafe { pac::Peripherals::steal() }.USART1,
+            (
+                pa9.into_alternate_open_drain(acrh),
+                pa10, //.into_pull_up_input(acrh),
+            ),
+            mapr,
+            250_000.bps(),
+            clocks,
+        );
 
-        let xfer = xfer.take().unwrap();
+        Self {
-        let (txbuffer, tx) = xfer.wait();
+            tx_universe,
-
+            sender: TxDMA::new(serial.tx.with_dma(dma_channel), tx_buffer),
-        *self = Self::Idle(Some(tx), Some(txbuffer));
+        }
+    }
+
+    pub fn start_tx(&mut self) {
+        self.sender.start_sending(self.tx_universe);
+    }
+
+    pub fn wait_tx(&mut self) {
+        self.sender.wait();
+    }
+
+    pub fn tx_is_idle(&mut self) -> bool {
+        self.sender.is_idle()
     }
 }

bluepill-rs/src/dmx2.rs

@@ -1,142 +0,0 @@
-use stm32f1xx_hal::{afio, dma, gpio, pac, prelude::*, rcc, serial};
-
-type TxDma = dma::TxDma<serial::Tx<pac::USART1>, dma::dma1::C4>;
-type DMXUniverse<const DMX_LEN: usize> = &'static mut [u8; DMX_LEN];
-type DMXTransfer<const DMX_LEN: usize> = dma::Transfer<dma::R, DMXUniverse<DMX_LEN>, TxDma>;
-
-struct TxDMAIdle<const DMX_LEN: usize> {
-    tx: TxDma,
-    buffer: DMXUniverse<DMX_LEN>,
-}
-
-struct TxDMABusy<const DMX_LEN: usize> {
-    transfer: DMXTransfer<DMX_LEN>,
-}
-
-enum TxDMA<const DMX_LEN: usize> {
-    Idle(Option<TxDMAIdle<DMX_LEN>>),
-    Busy(Option<TxDMABusy<DMX_LEN>>),
-}
-
-impl<const DMX_LEN: usize> TxDMA<DMX_LEN> {
-    fn new(tx: TxDma, buffer: DMXUniverse<DMX_LEN>) -> Self {
-        TxDMA::Idle(Some(TxDMAIdle { tx, buffer }))
-    }
-
-    fn start_sending(&mut self, tx_universe: &[u8]) {
-        let TxDMA::Idle(idle) = self else {
-            return;
-        };
-
-        let Some(TxDMAIdle { tx, buffer }) = idle.take() else {
-            panic!();
-        };
-
-        buffer.copy_from_slice(tx_universe);
-        *self = TxDMA::Busy(Some(TxDMABusy {
-            transfer: tx.write(buffer),
-        }));
-    }
-
-    fn wait(&mut self) {
-        let TxDMA::Busy(busy) = self else {
-            return;
-        };
-
-        let Some(TxDMABusy { transfer }) = busy.take() else {
-            panic!();
-        };
-
-        let (buffer, tx) = transfer.wait();
-
-        *self = TxDMA::Idle(Some(TxDMAIdle { tx, buffer }));
-    }
-
-    fn is_idle(&mut self) -> bool {
-        match self {
-            TxDMA::Idle(_) => true,
-
-            TxDMA::Busy(busy) => {
-                let Some(TxDMABusy { transfer }) = busy.take() else {
-                    panic!();
-                };
-
-                let is_done = transfer.is_done();
-                busy.replace(TxDMABusy { transfer });
-                if is_done {
-                    self.wait();
-                }
-
-                is_done
-            }
-        }
-    }
-}
-
-#[allow(clippy::upper_case_acronyms)]
-pub struct DMX<const DMX_LEN: usize> {
-    tx_universe: DMXUniverse<DMX_LEN>,
-    sender: TxDMA<DMX_LEN>,
-}
-
-impl<const DMX_LEN: usize> DMX<DMX_LEN> {
-    pub fn new(
-        mem: &'static mut [u8],
-        mut dma_channel: dma::dma1::C4,
-        pa9: gpio::PA9,
-        pa10: gpio::PA10,
-        acrh: &mut gpio::Cr<'A', true>,
-        mapr: &mut afio::MAPR,
-        clocks: &rcc::Clocks,
-    ) -> Self {
-        // use provided memory region
-        assert!(mem.len() >= DMX_LEN * 2);
-
-        let (tx_universe, tx_buffer) = {
-            let (tx_universe, rest) = mem.split_at_mut(DMX_LEN);
-            let (tx_buffer, _) = rest.split_at_mut(DMX_LEN);
-
-            let tx_universe: DMXUniverse<DMX_LEN> = tx_universe.try_into().unwrap();
-            let tx_buffer: DMXUniverse<DMX_LEN> = tx_buffer.try_into().unwrap();
-
-            (tx_universe, tx_buffer)
-        };
-
-        // setup DMA1_CHANNEL4 interrupt on TransferComplete
-        dma_channel.listen(dma::Event::TransferComplete);
-        unsafe {
-            pac::CorePeripherals::steal()
-                .NVIC
-                .set_priority(pac::Interrupt::DMA1_CHANNEL4, 1);
-        }
-
-        // Serial config
-        let serial = serial::Serial::new(
-            unsafe { pac::Peripherals::steal() }.USART1,
-            (
-                pa9.into_alternate_open_drain(acrh),
-                pa10, //.into_pull_up_input(acrh),
-            ),
-            mapr,
-            250_000.bps(),
-            clocks,
-        );
-
-        Self {
-            tx_universe,
-            sender: TxDMA::new(serial.tx.with_dma(dma_channel), tx_buffer),
-        }
-    }
-
-    pub fn start_tx(&mut self) {
-        self.sender.start_sending(self.tx_universe);
-    }
-
-    pub fn wait_tx(&mut self) {
-        self.sender.wait();
-    }
-
-    pub fn tx_is_idle(&mut self) -> bool {
-        self.sender.is_idle()
-    }
-}

bluepill-rs/src/main.rs

@@ -4,15 +4,14 @@
 
 // mod i2c_reg_slave;
 // mod i2c_slave;
-// mod dmx;
+mod dmx;
-mod dmx2;
 
 // extern crate panic_halt;
 extern crate panic_semihosting;
 
 #[rtic::app(device = stm32f1xx_hal::pac, dispatchers = [SPI1, SPI2, SPI3])]
 mod app {
-    use crate::dmx2::DMX;
+    use crate::dmx::DMX;
     use stm32f1xx_hal::{
         gpio::{self, ExtiPin},
         pac,