added files

1 files changed, 87 insertions, 0 deletions

diff --git a/code_refs/sharpmem.c b/code_refs/sharpmem.c
new file mode 100644
index 0000000..4e0040a
--- /dev/null
+++ b/code_refs/sharpmem.c
@@ -0,0 +1,87 @@
+#include "sharpmem.h"
+
+void SHARPMEM_TOGGLEVCOM(SharpMemDisplay_t *display) {
+    display->_sharpmem_vcom = display->_sharpmem_vcom ? 0x00 : SHARPMEM_BIT_VCOM;  
+}
+
+void SHARPMEM_draw_pixel(SharpMemDisplay_t *display, uint16_t x, uint16_t y, bool white) {
+    if ((x < 0) || (x >= display->width) || (y < 0) || (y >= display->height))
+        return;
+
+    if (black) {
+        display->buffer[(y * WIDTH + x) / 8] |= (0x1 << (x & 7)); //potentially expensive when run many times, use lookup from adafruit lib
+    } else {
+        display->buffer[(y * WIDTH + x) / 8] &= ~(0x1 << (x & 7));
+    }
+}
+
+void SHARPMEM_draw_line(SharpMemDisplay_t *display, uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, bool white, uint8_t thickness) {
+
+}
+
+void SHARPMEM_draw_circle(SharpMemDisplay_t *display, uint16_t x, uint16_t y, uint8_t r, bool filled) {
+
+}
+
+void SHARPMEM_draw_rect(SharpMemDisplay_t *display, uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, bool filled) {
+
+}
+
+uint8_t SHARPMEM_get_pixel(SharpMemDisplay_t *display, uint16_t x, uint16_t y) {
+
+}
+
+void SHARPMEM_clear_display(SharpMemDisplay_t *display) {
+    memset(display->_buffer, 0xff, (display->width * display->height) / 8);
+
+    // Send the clear screen command rather than doing a HW refresh (quicker)
+    
+    uint8_t clear_data[2] = {(uint8_t)(display->_sharpmem_vcom | SHARPMEM_BIT_CLEAR),
+                            0x00};
+    
+    HAL_GPIO_WritePin(display->cs_pin_bank, display->cs_pin, GPIO_PIN_SET);
+    HAL_SPI_Transmit(&display->spidev, clear_data, 2);
+    HAL_GPIO_WritePin(display->cs_pin_bank, display->cs_pin, GPIO_PIN_RESET);
+
+    SHARPMEM_TOGGLEVCOM(display);
+}
+
+void SHARPMEM_refresh_display(SharpMemDisplay_t *display) {
+    uint16_t i, currentline;
+
+    spidev->beginTransaction();
+    // Send the write command
+    HAL_GPIO_WritePin(display->cs_pin_bank, display->cs_pin, GPIO_PIN_SET);
+
+    HAL_SPI_Transmit(&display->spidev, (_sharpmem_vcom | SHARPMEM_BIT_WRITECMD), 1);
+    SHARPMEM_TOGGLEVCOM(display);;
+
+    uint8_t bytes_per_line = display->width / 8;
+    uint16_t totalbytes = (display->width * display->height) / 8;
+
+    for (i = 0; i < totalbytes; i += bytes_per_line) {
+        uint8_t line[bytes_per_line + 2];
+
+        // Send address byte
+        currentline = ((i + 1) / (WIDTH / 8)) + 1;
+        line[0] = currentline;
+        // copy over this line
+        memcpy(line + 1, display->_buffer + i, bytes_per_line);
+        // Send end of line
+        line[bytes_per_line + 1] = 0x00;
+        // send it!
+        HAL_SPI_Transmit(&display->spidev, line, bytes_per_line + 2);
+    }
+
+    // Send another trailing 8 bits for the last line
+    HAL_SPI_Transmit(&display->spidev, (0x00), 1);
+    HAL_GPIO_WritePin(display->cs_pin_bank, display->cs_pin, GPIO_PIN_RESET);
+}
+
+void SHARPMEM_clear_display_buffer(SharpMemDisplay_t *display) {
+
+}
+
+uint8_t *SHARPMEM_get_buffer(SharpMemDisplay_t *display) {
+
+}
\ No newline at end of file