succd: rewrite processing loop

succbone/succd/process_blocks.go

@@ -1,6 +1,9 @@
 package main
 
-import "time"
+import (
+	"math"
+	"time"
+)
 
 // momentaryOutput is an output that can be triggered for 500ms.
 type momentaryOutput struct {
@@ -73,3 +76,13 @@ func (r *ringbufferInput) process(input float32) {
 func (r *ringbufferInput) saturated() bool {
 	return len(r.data) >= int(r.limit)
 }
+
+type pfeifferVoltsToMbar struct {
+	mbar float32
+}
+
+func (p *pfeifferVoltsToMbar) process(volts float32) {
+	// Per Pirani probe docs.
+	bar := math.Pow(10.0, float64(volts)-8.5)
+	p.mbar = float32(bar * 1000.0)
+}