tests/stm32: add L1 DAC/ADC test.

4 files changed, 105 insertions, 12 deletions

diff --git a/tests/stm32/Cargo.toml b/tests/stm32/Cargo.toml
index 8c2cfdf5c..460c103b2 100644
--- a/tests/stm32/Cargo.toml
+++ b/tests/stm32/Cargo.toml
@@ -10,14 +10,14 @@ stm32c031c6 = ["embassy-stm32/stm32c031c6", "cm0", "not-gpdma"]
 stm32f103c8 = ["embassy-stm32/stm32f103c8", "not-gpdma"]
 stm32f207zg = ["embassy-stm32/stm32f207zg", "chrono", "not-gpdma", "eth", "rng"]
 stm32f303ze = ["embassy-stm32/stm32f303ze", "chrono", "not-gpdma"]
-stm32f429zi = ["embassy-stm32/stm32f429zi", "chrono", "eth", "stop", "can", "not-gpdma", "dac-adc-pin", "rng"]
-stm32f446re = ["embassy-stm32/stm32f446re", "chrono", "stop", "can", "not-gpdma", "dac-adc-pin", "sdmmc"]
+stm32f429zi = ["embassy-stm32/stm32f429zi", "chrono", "eth", "stop", "can", "not-gpdma", "dac", "rng"]
+stm32f446re = ["embassy-stm32/stm32f446re", "chrono", "stop", "can", "not-gpdma", "dac", "sdmmc"]
 stm32f767zi = ["embassy-stm32/stm32f767zi", "chrono", "not-gpdma", "eth", "rng"]
-stm32g071rb = ["embassy-stm32/stm32g071rb", "cm0", "not-gpdma", "dac-adc-pin"]
+stm32g071rb = ["embassy-stm32/stm32g071rb", "cm0", "not-gpdma", "dac"]
 stm32g491re = ["embassy-stm32/stm32g491re", "chrono", "stop", "not-gpdma", "rng"]
 stm32h563zi = ["embassy-stm32/stm32h563zi", "chrono", "eth", "rng"]
 stm32h753zi = ["embassy-stm32/stm32h753zi", "chrono", "not-gpdma", "eth", "rng"]
-stm32h755zi = ["embassy-stm32/stm32h755zi-cm7", "chrono", "not-gpdma", "eth", "dac-adc-pin", "rng"]
+stm32h755zi = ["embassy-stm32/stm32h755zi-cm7", "chrono", "not-gpdma", "eth", "dac", "rng"]
 stm32h7a3zi = ["embassy-stm32/stm32h7a3zi", "not-gpdma", "rng"]
 stm32l073rz = ["embassy-stm32/stm32l073rz", "cm0", "not-gpdma", "rng"]
 stm32l152re = ["embassy-stm32/stm32l152re", "chrono", "not-gpdma"]
@@ -41,7 +41,7 @@ ble = ["dep:embassy-stm32-wpan", "embassy-stm32-wpan/ble"]
 mac = ["dep:embassy-stm32-wpan", "embassy-stm32-wpan/mac"]
 embassy-stm32-wpan = []
 not-gpdma = []
-dac-adc-pin = []
+dac = []
 
 cm0 = ["portable-atomic/unsafe-assume-single-core"]
 
@@ -84,7 +84,12 @@ required-features = [ "can",]
 [[bin]]
 name = "dac"
 path = "src/bin/dac.rs"
-required-features = [ "dac-adc-pin",]
+required-features = [ "dac",]
+
+[[bin]]
+name = "dac_l1"
+path = "src/bin/dac_l1.rs"
+required-features = [ "stm32l152re",]
 
 [[bin]]
 name = "eth"
diff --git a/tests/stm32/src/bin/dac.rs b/tests/stm32/src/bin/dac.rs
index cf43106b3..9d64742df 100644
--- a/tests/stm32/src/bin/dac.rs
+++ b/tests/stm32/src/bin/dac.rs
@@ -1,7 +1,7 @@
 #![no_std]
 #![no_main]
 
-// required-features: dac-adc-pin
+// required-features: dac
 
 #[path = "../common.rs"]
 mod common;
@@ -22,12 +22,13 @@ async fn main(_spawner: Spawner) {
     // Initialize the board and obtain a Peripherals instance
     let p: embassy_stm32::Peripherals = embassy_stm32::init(config());
 
+    let adc = peri!(p, ADC);
     let dac = peri!(p, DAC);
     let dac_pin = peri!(p, DAC_PIN);
     let mut adc_pin = unsafe { core::ptr::read(&dac_pin) };
 
     let mut dac = DacCh1::new(dac, NoDma, dac_pin);
-    let mut adc = Adc::new(p.ADC1, &mut Delay);
+    let mut adc = Adc::new(adc, &mut Delay);
 
     #[cfg(feature = "stm32h755zi")]
     let normalization_factor = 256;
diff --git a/tests/stm32/src/bin/dac_l1.rs b/tests/stm32/src/bin/dac_l1.rs
new file mode 100644
index 000000000..f8b00aaef
--- /dev/null
+++ b/tests/stm32/src/bin/dac_l1.rs
@@ -0,0 +1,86 @@
+#![no_std]
+#![no_main]
+
+// required-features: stm32l152re
+
+#[path = "../common.rs"]
+mod common;
+use core::f32::consts::PI;
+
+use common::*;
+use defmt::assert;
+use embassy_executor::Spawner;
+use embassy_stm32::adc::Adc;
+use embassy_stm32::dac::{DacCh1, Value};
+use embassy_stm32::dma::NoDma;
+use embassy_stm32::{bind_interrupts, peripherals};
+use embassy_time::Timer;
+use micromath::F32Ext;
+use {defmt_rtt as _, panic_probe as _};
+
+bind_interrupts!(struct Irqs {
+    ADC1 => embassy_stm32::adc::InterruptHandler<peripherals::ADC>;
+});
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    // Initialize the board and obtain a Peripherals instance
+    let p: embassy_stm32::Peripherals = embassy_stm32::init(config());
+
+    let adc = peri!(p, ADC);
+    let dac = peri!(p, DAC);
+    let dac_pin = peri!(p, DAC_PIN);
+    let mut adc_pin = unsafe { core::ptr::read(&dac_pin) };
+
+    let mut dac = DacCh1::new(dac, NoDma, dac_pin);
+    let mut adc = Adc::new(adc, Irqs);
+
+    #[cfg(feature = "stm32h755zi")]
+    let normalization_factor = 256;
+    #[cfg(any(
+        feature = "stm32f429zi",
+        feature = "stm32f446re",
+        feature = "stm32g071rb",
+        feature = "stm32l152re",
+    ))]
+    let normalization_factor: i32 = 16;
+
+    dac.set(Value::Bit8(0));
+    // Now wait a little to obtain a stable value
+    Timer::after_millis(30).await;
+    let offset = adc.read(&mut adc_pin).await;
+
+    for v in 0..=255 {
+        // First set the DAC output value
+        let dac_output_val = to_sine_wave(v);
+        dac.set(Value::Bit8(dac_output_val));
+
+        // Now wait a little to obtain a stable value
+        Timer::after_millis(30).await;
+
+        // Need to steal the peripherals here because PA4 is obviously in use already
+        let measured = adc.read(&mut unsafe { embassy_stm32::Peripherals::steal() }.PA4).await;
+        // Calibrate and normalize the measurement to get close to the dac_output_val
+        let measured_normalized = ((measured as i32 - offset as i32) / normalization_factor) as i16;
+
+        info!("value / measured: {} / {}", dac_output_val, measured_normalized);
+
+        // The deviations are quite enormous but that does not matter since this is only a quick test
+        assert!((dac_output_val as i16 - measured_normalized).abs() < 15);
+    }
+
+    info!("Test OK");
+    cortex_m::asm::bkpt();
+}
+
+fn to_sine_wave(v: u8) -> u8 {
+    if v >= 128 {
+        // top half
+        let r = PI * ((v - 128) as f32 / 128.0);
+        (r.sin() * 128.0 + 127.0) as u8
+    } else {
+        // bottom half
+        let r = PI + PI * (v as f32 / 128.0);
+        (r.sin() * 128.0 + 127.0) as u8
+    }
+}
diff --git a/tests/stm32/src/common.rs b/tests/stm32/src/common.rs
index 155e1d9df..313380b35 100644
--- a/tests/stm32/src/common.rs
+++ b/tests/stm32/src/common.rs
@@ -101,14 +101,14 @@ define_peris!(
 define_peris!(
     UART = USART1, UART_TX = PC4, UART_RX = PC5, UART_TX_DMA = DMA1_CH1, UART_RX_DMA = DMA1_CH2,
     SPI = SPI1, SPI_SCK = PA5, SPI_MOSI = PA7, SPI_MISO = PA6, SPI_TX_DMA = DMA1_CH1, SPI_RX_DMA = DMA1_CH2,
-    DAC = DAC1, DAC_PIN = PA4,
+    ADC = ADC1, DAC = DAC1, DAC_PIN = PA4,
     @irq UART = {USART1 => embassy_stm32::usart::InterruptHandler<embassy_stm32::peripherals::USART1>;},
 );
 #[cfg(feature = "stm32f429zi")]
 define_peris!(
     UART = USART6, UART_TX = PG14, UART_RX = PG9, UART_TX_DMA = DMA2_CH6, UART_RX_DMA = DMA2_CH1,
     SPI = SPI1, SPI_SCK = PA5, SPI_MOSI = PA7, SPI_MISO = PA6, SPI_TX_DMA = DMA2_CH3, SPI_RX_DMA = DMA2_CH2,
-    DAC = DAC, DAC_PIN = PA4,
+    ADC = ADC1, DAC = DAC, DAC_PIN = PA4,
     CAN = CAN1, CAN_RX = PD0, CAN_TX = PD1,
     @irq UART = {USART6 => embassy_stm32::usart::InterruptHandler<embassy_stm32::peripherals::USART6>;},
 );
@@ -116,7 +116,7 @@ define_peris!(
 define_peris!(
     UART = USART1, UART_TX = PA9, UART_RX = PA10, UART_TX_DMA = DMA2_CH7, UART_RX_DMA = DMA2_CH5,
     SPI = SPI1, SPI_SCK = PA5, SPI_MOSI = PA7, SPI_MISO = PA6, SPI_TX_DMA = DMA2_CH3, SPI_RX_DMA = DMA2_CH2,
-    DAC = DAC, DAC_PIN = PA4,
+    ADC = ADC1, DAC = DAC, DAC_PIN = PA4,
     CAN = CAN1, CAN_RX = PA11, CAN_TX = PA12,
     @irq UART = {USART1 => embassy_stm32::usart::InterruptHandler<embassy_stm32::peripherals::USART1>;},
 );
@@ -130,7 +130,7 @@ define_peris!(
 define_peris!(
     UART = USART1, UART_TX = PB6, UART_RX = PB7, UART_TX_DMA = DMA1_CH0, UART_RX_DMA = DMA1_CH1,
     SPI = SPI1, SPI_SCK = PA5, SPI_MOSI = PB5, SPI_MISO = PA6, SPI_TX_DMA = DMA1_CH0, SPI_RX_DMA = DMA1_CH1,
-    DAC = DAC1, DAC_PIN = PA4,
+    ADC = ADC1, DAC = DAC1, DAC_PIN = PA4,
     @irq UART = {USART1 => embassy_stm32::usart::InterruptHandler<embassy_stm32::peripherals::USART1>;},
 );
 #[cfg(feature = "stm32h7a3zi")]
@@ -191,6 +191,7 @@ define_peris!(
 define_peris!(
     UART = USART3, UART_TX = PB10, UART_RX = PB11, UART_TX_DMA = DMA1_CH2, UART_RX_DMA = DMA1_CH3,
     SPI = SPI1, SPI_SCK = PA5, SPI_MOSI = PA7, SPI_MISO = PA6, SPI_TX_DMA = DMA1_CH3, SPI_RX_DMA = DMA1_CH2,
+    ADC = ADC, DAC = DAC, DAC_PIN = PA4,
     @irq UART = {USART3 => embassy_stm32::usart::InterruptHandler<embassy_stm32::peripherals::USART3>;},
 );
 #[cfg(feature = "stm32l552ze")]