Diff: BExprSPIArduino.hpp

Revision:

1:1a1cf1ae06f3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BExprSPIArduino.hpp	Sat Apr 11 08:47:51 2020 +0000
@@ -0,0 +1,35 @@
+/* Kabuki Tek @version 0.x
+@link  https://github.com/KabukiStarship/KabukiTek.git
+@file  /ExprI2CMbed.hpp
+@author  Cale McCollough <https://cale-mccollough.github.io>
+@license Copyright 2020 (C) Kabuki Starship <kabukistarship.com>.
+This Source Code Form is subject to the terms of the Mozilla Public License, 
+v. 2.0. If a copy of the MPL was not distributed with this file, you can obtain 
+one at <https://mozilla.org/MPL/2.0/>. */
+#pragma once
+#ifndef KabukiTekExprI2CMbedDecl
+#define KabukiTekExprI2CMbedDecl
+#include "BExpr.h"
+#include <Arduino.h>
+
+Expr* EvaluateSPI (Expr* Expr) {
+  int BytesInLength = Expr->BytesInLength,
+      BytesOutLength = Expr->BytesOutLength;
+  char* BytesIn = Expr->BytesIn,
+      * BytesInEnd = BytesIn +  Expr->BytesInLength;
+  char* BytesOut = Expr->BytesOut,
+      * BytesOutEnd = BytesOut +  Expr->BytesOutLength;
+  while (BytesIn < BytesInEnd && BytesOut < BytesOutEnd) {
+    char BytesInByte;
+    if (BytesIn < BytesInEnd) BytesInByte = *BytesIn++;
+    else BytesInByte = 0;
+    char BytesOutByte = SPI.transfer (BytesInByte);
+    if (BytesOut < BytesOutLength) *BytesOut++ = BytesOutByte;
+  }
+  Expr->BytesOutLength = BytesOutEnd - BytesOut;
+  return Expr;
+}
+
+#undef ExprBytesInLengthMax
+#undef ExprBytesOutLengthMax
+#endif
\ No newline at end of file