Merge pull request #108 from FrameworkComputer/adc

chromium_ec: Add adc_read

Author: JohnAZoidberg

framework_lib/src/chromium_ec/command.rs

@@ -46,6 +46,7 @@ pub enum EcCommands {
     RebootEc = 0x00D2,
     /// Get information about PD controller power
     UsbPdPowerInfo = 0x0103,
+    AdcRead = 0x0123,
     RgbKbdSetColor = 0x013A,
     RgbKbd = 0x013B,
 

framework_lib/src/chromium_ec/commands.rs

@@ -518,6 +518,22 @@ impl EcRequest<EcResponseUsbPdPowerInfo> for EcRequestUsbPdPowerInfo {
     }
 }
 
+#[repr(C, packed)]
+pub struct EcRequestAdcRead {
+    /// ADC Channel, specific to each mainboard schematic
+    pub adc_channel: u8,
+}
+
+pub struct EcResponseAdcRead {
+    pub adc_value: i32,
+}
+
+impl EcRequest<EcResponseAdcRead> for EcRequestAdcRead {
+    fn command_id() -> EcCommands {
+        EcCommands::AdcRead
+    }
+}
+
 // TODO: Actually 128, but if we go above ~80 EC returns REQUEST_TRUNCATED
 // At least when I use the portio driver
 pub const EC_RGBKBD_MAX_KEY_COUNT: usize = 64;

framework_lib/src/chromium_ec/mod.rs

@@ -953,6 +953,11 @@ impl CrosEc {
         Ok(res.val == 1)
     }
 
+    pub fn adc_read(&self, adc_channel: u8) -> EcResult<i32> {
+        let res = EcRequestAdcRead { adc_channel }.send_command(self)?;
+        Ok(res.adc_value)
+    }
+
     pub fn rgbkbd_set_color(&self, start_key: u8, colors: Vec<RgbS>) -> EcResult<()> {
         for (chunk, colors) in colors.chunks(EC_RGBKBD_MAX_KEY_COUNT).enumerate() {
             let mut request = EcRequestRgbKbdSetColor {