single repo

pico-ssd1306/frameBuffer/FrameBuffer.cpp

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+#include "FrameBuffer.h"
+
+FrameBuffer::FrameBuffer() {
+    this->buffer = new unsigned char[FRAMEBUFFER_SIZE];
+}
+
+FrameBuffer::~FrameBuffer() {
+    delete[] this->buffer;
+}
+
+void FrameBuffer::byteOR(int n, unsigned char byte) {
+    // return if index outside 0 - buffer length - 1
+    if (n > (FRAMEBUFFER_SIZE-1)) return;
+    this->buffer[n] |= byte;
+}
+
+void FrameBuffer::byteAND(int n, unsigned char byte) {
+    // return if index outside 0 - buffer length - 1
+    if (n > (FRAMEBUFFER_SIZE-1)) return;
+    this->buffer[n] &= byte;
+}
+
+void FrameBuffer::byteXOR(int n, unsigned char byte) {
+    // return if index outside 0 - buffer length - 1
+    if (n > (FRAMEBUFFER_SIZE-1)) return;
+    this->buffer[n] ^= byte;
+}
+
+
+void FrameBuffer::setBuffer(unsigned char *new_buffer) {
+    // free buffer memory to prevent memory leak
+    delete[] this->buffer;
+    this->buffer = new_buffer;
+}
+
+void FrameBuffer::clear() {
+    //zeroes out the buffer via memset function from string library
+    memset(this->buffer, 0, FRAMEBUFFER_SIZE);
+}
+
+unsigned char *FrameBuffer::get() {
+    return this->buffer;
+}

pico-ssd1306/frameBuffer/FrameBuffer.h

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+#ifndef SSD1306_FRAMEBUFFER_H
+#define SSD1306_FRAMEBUFFER_H
+
+#include <string.h>
+
+/// \brief Set frame buffer to 1024 bytes, witch is 128*64 / 8
+///
+/// For 128x32 displays it's still 1024 due to how memory mapping works on ssd1306.
+/// This is explained in readme.md
+#define FRAMEBUFFER_SIZE 1024
+
+/// \brief Framebuffer class contains a pointer to buffer and functions for interacting with it
+class FrameBuffer {
+    unsigned char * buffer;
+public:
+    /// Constructs frame buffer and allocates memory for buffer
+    FrameBuffer();
+
+    /// Destroys frame buffer and frees buffer memory
+    ~FrameBuffer();
+
+    /// \brief Performs OR logical operation on selected and provided byte
+    ///
+    /// ex. if byte in buffer at position n is 0b10001111 and provided byte is 0b11110000 the buffer at position n becomes 0b11111111
+    /// \param n - byte offset in buffer array to work on
+    /// \param byte - provided byte to make operation
+    void byteOR(int n, unsigned char byte);
+
+    /// \brief Performs AND logical operation on selected and provided byte
+    ///
+    /// ex. if byte in buffer at position n is 0b10001111 and provided byte is 0b11110000 the buffer at position n becomes 0b10000000
+    /// \param n - byte offset in buffer array to work on
+    /// \param byte - provided byte to make operation
+    void byteAND(int n, unsigned char byte);
+
+    /// \brief Performs XOR logical operation on selected and provided byte
+    ///
+    /// ex. if byte in buffer at position n is 0b10001111 and provided byte is 0b11110000 the buffer at position n becomes 0b0111111
+    /// \param n - byte offset in buffer array to work on
+    /// \param byte - provided byte to make operation
+    void byteXOR(int n, unsigned char byte);
+
+    /// Replaces pointer with one pointing to a different buffer
+    void setBuffer(unsigned char * new_buffer);
+
+    /// Zeroes out the buffer aka set buffer to all 0
+    void clear();
+
+    /// Returns a pointer to the buffer
+    unsigned char * get();
+};
+
+
+#endif //SSD1306_FRAMEBUFFER_H