electronut · October 29, 2017 08:17 · Oct 29, 2017
diff --git a/stm32-returns-4.c b/stm32-returns-4.c
@@ -0,0 +1,34 @@
+struct BitBuf88
+{
+	// constr
+	BitBuf88() {
+		clearAll();
+	}
+	// destr
+	virtual ~BitBuf88() {}
+
+	// set (i, j)
+	void set(uint8_t i, uint8_t j) {
+		_vals[i] |= (1 << j);
+	}
+
+	// clear (i, j)
+	void clr(uint8_t i, uint8_t j) {
+		_vals[i] &= ~(1 << j);
+	}
+
+	// get (i, j)
+	bool get(uint8_t i, uint8_t j) {
+		return _vals[i] & (1 << j) ? true : false;
+	}
+
+	// clear all bits
+	void clearAll() {
+		for(uint8_t i = 0; i < 8; i++) {
+			_vals[i] = 0;
+		}
+	}
+
+	// vals[i] represents digit (column) and bits vals[i][0:7] the rows
+	uint8_t _vals[8];
+};