Weighing: Add Gassner scale and update tests

2024-04-13 18:00:17 +02:00
parent c6905bbb42
commit 443e111594
12 changed files with 626 additions and 21 deletions
--- a/Elwig/Helpers/Weighing/GassnerScale.cs
+++ b/Elwig/Helpers/Weighing/GassnerScale.cs
@ -0,0 +1,122 @@
+using System;
+using System.IO;
+using System.IO.Ports;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Elwig.Helpers.Weighing {
+    public class GassnerScale : Scale, ICommandScale {
+
+        public string Manufacturer => "Gassner";
+        public int InternalScaleNr => 1;
+        public string Model { get; private set; }
+        public string ScaleId { get; private set; }
+        public bool IsReady { get; private set; }
+        public bool HasFillingClearance { get; private set; }
+
+        public GassnerScale(string id, string model, string cnx, string? empty = null, string? filling = null, int? limit = null, string? log = null) :
+          base(cnx, empty, filling, limit, log) {
+            ScaleId = id;
+            Model = model;
+            IsReady = true;
+            HasFillingClearance = false;
+            Stream.WriteTimeout = 250;
+            Stream.ReadTimeout = 11000;
+        }
+
+        protected Task SendCommand(char command) => SendCommand(Convert.ToByte(command));
+
+        protected async Task SendCommand(byte command) {
+            byte[] cmd = [command];
+            await Stream.WriteAsync(cmd);
+            if (LogPath != null) await File.AppendAllTextAsync(LogPath, Encoding.ASCII.GetString(cmd));
+        }
+
+        protected async Task<string> ReceiveResponse() {
+            var line = await Reader.ReadUntilAsync('\x03');
+            if (LogPath != null) await File.AppendAllTextAsync(LogPath, $"{line}\r\n");
+            if (line == null || line.Length < 4 || !line.StartsWith('\x02')) {
+                throw new IOException("Invalid response from scale");
+            }
+
+            var status = line[1..3];
+            if (status[0] == 'E' || status[1] != 'S') {
+                string msg = $"Unbekannter Fehler (Fehler code {status})";
+                switch (status[1]) {
+                    case 'M': msg = "Waage in Bewegung"; break;
+                }
+                throw new IOException($"Waagenfehler {status}: {msg}");
+            } else if (status[0] != ' ') {
+                throw new IOException($"Invalid response from scale (error code {status})");
+            }
+
+            return line[1..^1];
+        }
+
+        protected async Task<WeighingResult> Weigh(bool incIdentNr) {
+            await SendCommand(incIdentNr ? '\x05' : '?');
+            string record = await ReceiveResponse();
+            if (record.Length != 45)
+                throw new IOException("Invalid response from scale: Received record has invalid size");
+            var line = record[2..];
+
+            var status  = line[ 0.. 2];
+            var brutto  = line[ 2.. 9].Trim();
+            var tara    = line[ 9..16].Trim();
+            var netto   = line[16..23].Trim();
+            var scaleNr = line[23..25].Trim();
+            var identNr = line[25..31].Trim();
+            var date    = line[31..39];
+            var time    = line[39..45];
+
+            identNr = identNr.Length > 0 && identNr != "0" ? identNr : null;
+            var parsedDate = DateOnly.ParseExact(date, "yyyyMMdd");
+            return new() {
+                Weight = int.Parse(netto),
+                WeighingId = identNr,
+                FullWeighingId = identNr,
+                Date = parsedDate,
+                Time = TimeOnly.ParseExact(time, "HHmmss"),
+            };
+        }
+
+        public async Task<WeighingResult> Weigh() {
+            return await Weigh(true);
+        }
+
+        public async Task<WeighingResult> GetCurrentWeight() {
+            return await Weigh(false);
+        }
+
+        public async Task Empty() {
+            SerialPort? p = ControlSerialEmpty ?? Serial;
+            if (EmptyMode == Output.RTS && p != null) {
+                p.RtsEnable = true;
+                await Task.Delay(EmptyDelay);
+                p.RtsEnable = false;
+            } else if (EmptyMode == Output.DTR && p != null) {
+                p.DtrEnable = true;
+                await Task.Delay(EmptyDelay);
+                p.DtrEnable = false;
+            }
+        }
+
+        protected Task SetFillingClearance(bool status) {
+            SerialPort? p = ControlSerialFilling ?? Serial;
+            if (FillingClearanceMode == Output.RTS && p != null) {
+                p.RtsEnable = status;
+            } else if (FillingClearanceMode == Output.DTR && p != null) {
+                p.DtrEnable = status;
+            }
+            return Task.CompletedTask;
+        }
+
+        public async Task GrantFillingClearance() {
+            await SetFillingClearance(true);
+        }
+
+        public async Task RevokeFillingClearance() {
+            await SetFillingClearance(false);
+        }
+    }
+}