finished basic ADC and DAC HAL

examples/simple/examples/adc.rs

@@ -0,0 +1,70 @@
+//! Simple ADC example.
+#![no_main]
+#![no_std]
+
+use cortex_m_rt::entry;
+use embedded_hal::delay::DelayNs;
+use panic_rtt_target as _;
+use rtt_target::{rprintln, rtt_init_print};
+use simple_examples::peb1;
+use va416xx_hal::{
+    adc::{Adc, ChannelSelect, ChannelValue, MultiChannelSelect},
+    pac,
+    prelude::*,
+    timer::CountdownTimer,
+};
+
+// Quite spammy and disabled by default.
+const ENABLE_BUF_PRINTOUT: bool = false;
+
+#[entry]
+fn main() -> ! {
+    rtt_init_print!();
+    rprintln!("VA416xx ADC example");
+
+    let mut dp = pac::Peripherals::take().unwrap();
+    // Use the external clock connected to XTAL_N.
+    let clocks = dp
+        .clkgen
+        .constrain()
+        .xtal_n_clk_with_src_freq(peb1::EXTCLK_FREQ)
+        .freeze(&mut dp.sysconfig)
+        .unwrap();
+
+    let adc = Adc::new_with_channel_tag(&mut dp.sysconfig, dp.adc, &clocks);
+    let mut delay_provider = CountdownTimer::new(&mut dp.sysconfig, dp.tim0, &clocks);
+    let mut read_buf: [ChannelValue; 8] = [ChannelValue::default(); 8];
+    loop {
+        let single_value = adc
+            .trigger_and_read_single_channel(va416xx_hal::adc::ChannelSelect::AnIn0)
+            .expect("reading single channel value failed");
+        rprintln!("Read single ADC value on channel 0: {:?}", single_value);
+        let read_num = adc
+            .sweep_and_read_range(0, 7, &mut read_buf)
+            .expect("ADC range read failed");
+        if ENABLE_BUF_PRINTOUT {
+            rprintln!("ADC Range Read (0-8) read {} values", read_num);
+            rprintln!("ADC Range Read (0-8): {:?}", read_buf);
+        }
+        assert_eq!(read_num, 8);
+        for (idx, ch_val) in read_buf.iter().enumerate() {
+            assert_eq!(
+                ch_val.channel(),
+                ChannelSelect::try_from(idx as u8).unwrap()
+            );
+        }
+
+        adc.sweep_and_read_multiselect(
+            MultiChannelSelect::AnIn0 | MultiChannelSelect::AnIn2 | MultiChannelSelect::TempSensor,
+            &mut read_buf[0..3],
+        )
+        .expect("ADC multiselect read failed");
+        if ENABLE_BUF_PRINTOUT {
+            rprintln!("ADC Multiselect Read(0, 2 and 10): {:?}", &read_buf[0..3]);
+        }
+        assert_eq!(read_buf[0].channel(), ChannelSelect::AnIn0);
+        assert_eq!(read_buf[1].channel(), ChannelSelect::AnIn2);
+        assert_eq!(read_buf[2].channel(), ChannelSelect::TempSensor);
+        delay_provider.delay_ms(500);
+    }
+}

examples/simple/examples/blinky.rs

@@ -16,7 +16,6 @@ fn main() -> ! {
     let mut dp = pac::Peripherals::take().unwrap();
     let portg = PinsG::new(&mut dp.sysconfig, dp.portg);
     let mut led = portg.pg5.into_readable_push_pull_output();
-    //let mut delay = CountDownTimer::new(&mut dp.SYSCONFIG, 50.mhz(), dp.TIM0);
     loop {
         cortex_m::asm::delay(2_000_000);
         led.toggle().ok();

examples/simple/examples/dac-adc.rs

@@ -0,0 +1,78 @@
+//! Simple DAC-ADC example.
+#![no_main]
+#![no_std]
+
+use cortex_m_rt::entry;
+use embedded_hal::delay::DelayNs;
+use panic_rtt_target as _;
+use rtt_target::{rprintln, rtt_init_print};
+use simple_examples::peb1;
+use va416xx_hal::{adc::Adc, dac::Dac, pac, prelude::*, timer::CountdownTimer};
+
+const DAC_INCREMENT: u16 = 256;
+
+#[derive(Debug, PartialEq, Eq)]
+pub enum AppMode {
+    // Measurements on AIN0.
+    AdcOnly,
+    // AOUT0. You can use a multi-meter to measure the changing voltage on the pin.
+    DacOnly,
+    /// AOUT0 needs to be wired to AIN0.
+    DacAndAdc,
+}
+
+const APP_MODE: AppMode = AppMode::DacAndAdc;
+
+#[entry]
+fn main() -> ! {
+    rtt_init_print!();
+    rprintln!("VA416xx DAC/ADC example");
+
+    let mut dp = pac::Peripherals::take().unwrap();
+    // Use the external clock connected to XTAL_N.
+    let clocks = dp
+        .clkgen
+        .constrain()
+        .xtal_n_clk_with_src_freq(peb1::EXTCLK_FREQ)
+        .freeze(&mut dp.sysconfig)
+        .unwrap();
+    let mut dac = None;
+    if APP_MODE == AppMode::DacOnly || APP_MODE == AppMode::DacAndAdc {
+        dac = Some(Dac::new(
+            &mut dp.sysconfig,
+            dp.dac0,
+            va416xx_hal::dac::DacSettling::Apb2Times100,
+            &clocks,
+        ));
+    }
+    let mut adc = None;
+    if APP_MODE == AppMode::AdcOnly || APP_MODE == AppMode::DacAndAdc {
+        adc = Some(Adc::new(&mut dp.sysconfig, dp.adc, &clocks));
+    }
+    let mut delay_provider = CountdownTimer::new(&mut dp.sysconfig, dp.tim0, &clocks);
+    let mut current_val = 0;
+    loop {
+        if let Some(dac) = &dac {
+            rprintln!("loading DAC with value {}", current_val);
+            dac.load_and_trigger_manually(current_val)
+                .expect("loading DAC value failed");
+            if current_val + DAC_INCREMENT >= 4096 {
+                current_val = 0;
+            } else {
+                current_val += DAC_INCREMENT;
+            }
+        }
+        if let Some(dac) = &dac {
+            // This should never block.
+            nb::block!(dac.is_settled()).unwrap();
+        }
+        if let Some(adc) = &adc {
+            let ch_value = adc
+                .trigger_and_read_single_channel(va416xx_hal::adc::ChannelSelect::AnIn0)
+                .expect("reading ADC channel 0 failed");
+            rprintln!("Received channel value {:?}", ch_value);
+        }
+
+        delay_provider.delay_ms(500);
+    }
+}