1 files changed, 35 insertions, 0 deletions
diff --git a/sw/picardy/src/cw.rs b/sw/picardy/src/cw.rs
new file mode 100644
index 0000000..ce99e39
--- /dev/null
+++ b/sw/picardy/src/cw.rs
@@ -0,0 +1,35 @@
+//! CW output using PWM on PA8, TIM1 CH1
+
+use stm32f1xx_hal::{
+    prelude::*,
+    timer,
+    pac::TIM1,
+    gpio::gpioa::*,
+    gpio::{Alternate, PushPull},
+    afio::MAPR,
+    pwm,
+};
+
+pub struct CWPWM {
+    channel : pwm::PwmChannel<TIM1, pwm::C1>,
+}
+
+impl CWPWM {
+    pub fn new(pa8: PA8<Alternate<PushPull>>, tim1: timer::Timer<TIM1>, mapr: &mut MAPR) -> Self {
+        let pwm = tim1.pwm(pa8, mapr, 400.hz());
+        let mut channel = pwm.split();
+        channel.enable();
+        channel.set_duty(0);
+        CWPWM { channel }
+    }
+
+    pub fn on(&mut self) {
+        let max = self.channel.get_max_duty();
+        self.channel.set_duty(max / 2);
+    }
+
+    pub fn off(&mut self) {
+        self.channel.set_duty(0);
+    }
+}
+