PwmLimits: Save user set value into flash

In place of the machine values derived from the PWM duty / center point
calculations

README.md

@@ -100,10 +100,10 @@ formatted as line-delimited JSON.
 | `report mode`                    | Show current report mode                                                      |
 | `report mode <off/on>`           | Set report mode                                                               |
 | `pwm`                            | Show current PWM settings                                                     |
-| `pwm <0/1> max_i_pos <amp>`      | Set maximum positive output current                                           |
+| `pwm <0/1> max_i_pos <amp>`      | Set maximum positive output current, clamped at [0, 2]                        |
-| `pwm <0/1> max_i_neg <amp>`      | Set maximum negative output current                                           |
+| `pwm <0/1> max_i_neg <amp>`      | Set maximum negative output current, clamped at [0, 2]                        |
-| `pwm <0/1> max_v <volt>`         | Set maximum output voltage                                                    |
+| `pwm <0/1> max_v <volt>`         | Set maximum output voltage, clamped at [0, 4]                                 |
-| `pwm <0/1> i_set <amp>`          | Disengage PID, set fixed output current                                       |
+| `pwm <0/1> i_set <amp>`          | Disengage PID, set fixed output current, clamped at [-2, 2]                   |
 | `pwm <0/1> pid`                  | Let output current to be controlled by the PID                                |
 | `center <0/1> <volt>`            | Set the MAX1968 0A-centerpoint to the specified fixed voltage                 |
 | `center <0/1> vref`              | Set the MAX1968 0A-centerpoint to measure from VREF                           |

src/channel.rs

@@ -24,7 +24,7 @@ pub struct Channel<C: ChannelPins> {
     pub vref_meas: ElectricPotential,
     pub shdn: C::Shdn,
     pub vref_pin: C::VRefPin,
-    pub itec_pin: C::ItecPin,
+    pub itec_pin: C::ITecPin,
     /// feedback from `dac` output
     pub dac_feedback_pin: C::DacFeedbackPin,
     pub tec_u_meas_pin: C::TecUMeasPin,

src/channels.rs

@@ -521,7 +521,7 @@ impl Channels {
         PwmSummary {
             channel,
             center: CenterPointJson(self.channel_state(channel).center.clone()),
-            i_set: (self.get_i(channel), MAX_TEC_I).into(),
+            i_set: (self.get_i(channel), self.channel_state(channel).i_set).into(),
             max_v: self.get_max_v(channel).into(),
             max_i_pos: self.get_max_i_pos(channel).into(),
             max_i_neg: self.get_max_i_neg(channel).into(),
@@ -609,12 +609,12 @@ impl Serialize for CenterPointJson {
 #[derive(Serialize)]
 pub struct PwmSummaryField<T: Serialize> {
     value: T,
-    user_value: T,
+    set_value: T,
 }
 
 impl<T: Serialize> From<(T, T)> for PwmSummaryField<T> {
-    fn from((value, user_value): (T, T)) -> Self {
+    fn from((value, set_value): (T, T)) -> Self {
-        PwmSummaryField { value, user_value }
+        PwmSummaryField { value, set_value }
     }
 }
 

src/pins.rs

@@ -61,7 +61,7 @@ pub trait ChannelPins {
     type DacSync: OutputPin;
     type Shdn: OutputPin;
     type VRefPin;
-    type ItecPin;
+    type ITecPin;
     type DacFeedbackPin;
     type TecUMeasPin;
 }
@@ -76,7 +76,7 @@ impl ChannelPins for Channel0 {
     type DacSync = PE4<Output<PushPull>>;
     type Shdn = PE10<Output<PushPull>>;
     type VRefPin = Channel0VRef;
-    type ItecPin = PA6<Analog>;
+    type ITecPin = PA6<Analog>;
     type DacFeedbackPin = PA4<Analog>;
     type TecUMeasPin = PC2<Analog>;
 }
@@ -91,7 +91,7 @@ impl ChannelPins for Channel1 {
     type DacSync = PF6<Output<PushPull>>;
     type Shdn = PE15<Output<PushPull>>;
     type VRefPin = Channel1VRef;
-    type ItecPin = PB0<Analog>;
+    type ITecPin = PB0<Analog>;
     type DacFeedbackPin = PA5<Analog>;
     type TecUMeasPin = PC3<Analog>;
 }
@@ -108,7 +108,7 @@ pub struct ChannelPinSet<C: ChannelPins> {
     pub dac_sync: C::DacSync,
     pub shdn: C::Shdn,
     pub vref_pin: C::VRefPin,
-    pub itec_pin: C::ItecPin,
+    pub itec_pin: C::ITecPin,
     pub dac_feedback_pin: C::DacFeedbackPin,
     pub tec_u_meas_pin: C::TecUMeasPin,
 }