memory driver updated. implement simple JSON read/write to wyldcard memory

Author: Jonahss

napi-rust-drivers/Cargo.toml

@@ -14,7 +14,7 @@ napi = { version = "2.12.1", default-features = false, features = ["napi4"] }
 napi-derive = "2.12.2"
 embedded-hal = { version = "0.2.7", features = ["unproven"] }
 rppal = { version = "0.12.0", features = ["hal","hal-unproven"] }
-m95320 = "1.0.2"
+m95320 = "1.0.3"
 shared-bus = "0.2.4"
 signal-hook = "0.3.9"
 rand = "0.8.0"

napi-rust-drivers/demo.js

@@ -49,7 +49,7 @@ async function main() {
   let getData = function(well) {
     return () => {
       let data = well.getData()
-      console.log('data for card in well', well.id, data)
+      return data
     }
   }
 
@@ -58,7 +58,6 @@ async function main() {
     let buf = Buffer.alloc(4096, ' '.charCodeAt(0))
     buf[0] = '{'.charCodeAt(0)
     buf[1] = '}'.charCodeAt(0)
-    console.log(buf.toString())
     well._writeMemory(buf)
     console.log('erased well', well.id)
   }
@@ -70,11 +69,11 @@ async function main() {
   // })
 
   erase(plinth.wells[0])
-  console.log('erased. now getting data')
-  getData(plinth.wells[0])()
-
+  console.log(plinth.wells[0].getData())
   plinth.wells[0].storeData({ hello: 'chukwudi'})
-  getData(plinth.wells[0])()
+  console.log(plinth.wells[0].getData())
+  plinth.wells[0].storeData({ hello: 'chukwudi', ohyeah: 'coolaid'})
+  console.log(plinth.wells[0].getData())
 }
 
 main()

napi-rust-drivers/plinth.js

@@ -42,7 +42,15 @@ class Well {
   }
 
   storeData = function(object) {
-    this._writeMemory(Buffer.from(JSON.stringify(object)))
+    let text = JSON.stringify(object)
+    if (text.length > this.maxMemory) {
+      throw new Error(`attempted to store too much data. JSON stringified data is of length ${text.length}, which is more than the maximum of ${this.maxMemory}. You could try using the _writeMemory and _readMemory functions directly, storing data in binary rather than ascii JSON.`)
+    }
+
+    let buf = Buffer.alloc(4096, ' ')
+    buf.write(text)
+
+    this._writeMemory(buf)
   }
 
   _readMemory = function() {