1 files changed, 47 insertions, 0 deletions
diff --git a/hsm-status/Hsm/Status.hs b/hsm-status/Hsm/Status.hs
new file mode 100644
index 0000000..94b6351
--- /dev/null
+++ b/hsm-status/Hsm/Status.hs
@@ -0,0 +1,47 @@
+{-# LANGUAGE DataKinds #-}
+{-# LANGUAGE OverloadedRecordDot #-}
+{-# LANGUAGE OverloadedStrings #-}
+
+module Hsm.Status
+  ( StatusEnv(..)
+  , statusEnvDefault
+  , status
+  ) where
+
+import Foreign.Ptr (Ptr)
+import GHC.Records (HasField)
+import Hsm.GPIO (GPIO(..), LineRequest, active, inactive, setPins)
+import Hsm.Log qualified as L
+import Hsm.PWM (PWMChannel(PWM2), PWMHandle, setDutyCycle, setPeriod)
+
+data StatusEnv = StatusEnv
+  { gpioError :: GPIO
+  , gpioOK :: GPIO
+  }
+
+statusEnvDefault :: StatusEnv
+statusEnvDefault = StatusEnv {gpioError = GPIO17, gpioOK = GPIO27}
+
+status ::
+     HasField "statusEnv" env StatusEnv
+  => Ptr LineRequest
+  -> PWMHandle
+  -> env
+  -> [Bool]
+  -> IO ()
+status lineRequest pwmHandle env signals = do
+  setDutyCycle pwmHandle PWM2 pwmDutyCycle
+  setPeriod pwmHandle PWM2 pwmPeriod
+  if and signals
+    then do
+      logMsg "All signals OK"
+      setPins lineRequest [env.statusEnv.gpioError] inactive
+      setPins lineRequest [env.statusEnv.gpioOK] active
+    else do
+      logMsg "Error signal received"
+      setPins lineRequest [env.statusEnv.gpioError] active
+      setPins lineRequest [env.statusEnv.gpioOK] inactive
+  where
+    logMsg = L.logMsg ["status"]
+    pwmDutyCycle = 1000000000
+    pwmPeriod = 2000000000