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path: root/drivers/gdisp/PCD8544/gdisp_lld_PCD8544.c
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Diffstat (limited to 'drivers/gdisp/PCD8544/gdisp_lld_PCD8544.c')
-rw-r--r--drivers/gdisp/PCD8544/gdisp_lld_PCD8544.c233
1 files changed, 233 insertions, 0 deletions
diff --git a/drivers/gdisp/PCD8544/gdisp_lld_PCD8544.c b/drivers/gdisp/PCD8544/gdisp_lld_PCD8544.c
new file mode 100644
index 00000000..8ebd619a
--- /dev/null
+++ b/drivers/gdisp/PCD8544/gdisp_lld_PCD8544.c
@@ -0,0 +1,233 @@
+/*
+ * This file is subject to the terms of the GFX License. If a copy of
+ * the license was not distributed with this file, you can obtain one at:
+ *
+ * http://ugfx.org/license.html
+ */
+
+#include "gfx.h"
+
+#if GFX_USE_GDISP
+
+#define GDISP_DRIVER_VMT GDISPVMT_PCD8544
+#include "drivers/gdisp/PCD8544/gdisp_lld_config.h"
+#include "src/gdisp/driver.h"
+#include "board_PCD8544.h"
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+#define GDISP_SCREEN_HEIGHT 48
+#define GDISP_SCREEN_WIDTH 84
+
+#define GDISP_INITIAL_CONTRAST 51
+#define GDISP_INITIAL_BACKLIGHT 100
+
+#define GDISP_FLG_NEEDFLUSH (GDISP_FLG_DRIVER << 0)
+
+#include "drivers/gdisp/PCD8544/PCD8544.h"
+
+/*===========================================================================*/
+/* Driver local routines . */
+/*===========================================================================*/
+
+// Some common routines and macros
+#define RAM(g) ((uint8_t *)g->priv)
+
+#define xyaddr(x, y) ((x) + ((y) >> 3) * GDISP_SCREEN_WIDTH)
+#define xybit(y) (1 << ((y) & 7))
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/*
+ * As this controller can't update on a pixel boundary we need to maintain the
+ * the entire display surface in memory so that we can do the necessary bit
+ * operations. Fortunately it is a small display in monochrome.
+ * Display 48 * 84 / 8 = 504
+ */
+
+#define GDISP_SCREEN_BYTES ((GDISP_SCREEN_WIDTH * GDISP_SCREEN_HEIGHT) / 8)
+
+LLDSPEC bool_t gdisp_lld_init(GDisplay *g) {
+ // The private area is the display surface.
+ if (!(g->priv = gfxAlloc(GDISP_SCREEN_BYTES)))
+ gfxHalt("GDISP PCD8544: Failed to allocate private memory");
+
+ // Initialise the board interface
+ init_board(g);
+
+ // Hardware reset
+ setpin_reset(g, TRUE);
+ gfxSleepMilliseconds(100);
+ setpin_reset(g, FALSE);
+ gfxSleepMilliseconds(100);
+
+ acquire_bus(g);
+
+ write_cmd(g, PCD8544_SET_FUNC | PCD8544_H);
+ write_cmd(g, PCD8544_SET_TEMP | PCD8544_TEMP_MODE_2);
+ write_cmd(g, PCD8544_SET_BIAS | PCD8544_BIAS_MODE_4);
+ write_cmd(g, PCD8544_SET_VOP | (0x40));
+ write_cmd(g, PCD8544_SET_FUNC);
+ write_cmd(g, PCD8544_SET_DISPLAY | PCD8544_DISPLAY_MODE_NORMAL);
+ write_cmd(g, PCD8544_SET_X); // X = 0
+ write_cmd(g, PCD8544_SET_Y); // Y = 0
+
+ coord_t i;
+
+ for (i = 0; i < GDISP_SCREEN_BYTES; i++) {
+ write_data(g, 0x00, 1);
+ }
+
+ // Finish Init
+ post_init_board(g);
+
+ // Release the bus
+ release_bus(g);
+
+ /* Turn on the back-light */
+ set_backlight(g, GDISP_INITIAL_BACKLIGHT);
+
+ /* Initialise the GDISP structure */
+ g->g.Width = GDISP_SCREEN_WIDTH;
+ g->g.Height = GDISP_SCREEN_HEIGHT;
+ g->g.Orientation = GDISP_ROTATE_0;
+ g->g.Powermode = powerOn;
+ g->g.Backlight = GDISP_INITIAL_BACKLIGHT;
+ g->g.Contrast = GDISP_INITIAL_CONTRAST;
+
+ return TRUE;
+}
+
+#if GDISP_HARDWARE_FLUSH
+ LLDSPEC void gdisp_lld_flush(GDisplay *g) {
+
+ // Don't flush if we don't need it.
+ if (!(g->flags & GDISP_FLG_NEEDFLUSH)) {
+ return;
+ }
+
+ acquire_bus(g);
+
+ write_cmd(g, PCD8544_SET_X | 0); // X = 0
+ write_cmd(g, PCD8544_SET_Y | 0); // Y = 0
+
+ coord_t i;
+
+ for (i = 0; i < GDISP_SCREEN_BYTES; i++) {
+ write_data(g, RAM(g)[i], 1);
+ }
+
+ release_bus(g);
+ }
+#endif
+
+#if GDISP_HARDWARE_DRAWPIXEL
+ LLDSPEC void gdisp_lld_draw_pixel(GDisplay *g) {
+ coord_t x, y;
+
+ #if GDISP_NEED_CONTROL
+ switch(g->g.Orientation) {
+ default:
+ case GDISP_ROTATE_0:
+ x = g->p.x;
+ y = g->p.y;
+ break;
+ case GDISP_ROTATE_90:
+ x = g->p.y;
+ y = g->g.Width - g->p.x - 1;
+ break;
+ case GDISP_ROTATE_180:
+ x = g->g.Width - g->p.x - 1;
+ y = g->g.Height - g->p.y - 1;
+ break;
+ case GDISP_ROTATE_270:
+ x = g->g.Height - g->p.y - 1;
+ y = g->p.x;
+ break;
+ }
+ #else
+ x = g->p.x;
+ y = g->p.y;
+ #endif
+
+ if (gdispColor2Native(g->p.color) != Black) {
+ RAM(g)[xyaddr(x, y)] |= xybit(y);
+ } else {
+ RAM(g)[xyaddr(x, y)] &= ~xybit(y);
+ }
+
+ g->flags |= GDISP_FLG_NEEDFLUSH;
+ }
+#endif
+
+#if GDISP_NEED_CONTROL
+ LLDSPEC void gdisp_lld_control(GDisplay *g) {
+ switch(g->p.x) {
+ case GDISP_CONTROL_POWER:
+ if (g->g.Powermode == (powermode_t)g->p.ptr)
+ return;
+ switch((powermode_t)g->p.ptr) {
+ case powerOff:
+ case powerSleep:
+ case powerDeepSleep:
+ write_cmd(g, PCD8544_SET_FUNC | PCD8544_PD);
+ break;
+ case powerOn:
+ write_cmd(g, PCD8544_SET_FUNC);
+ break;
+ default:
+ return;
+ }
+ g->g.Powermode = (powermode_t)g->p.ptr;
+ return;
+
+ case GDISP_CONTROL_ORIENTATION:
+ if (g->g.Orientation == (orientation_t)g->p.ptr)
+ return;
+ switch((orientation_t)g->p.ptr) {
+ case GDISP_ROTATE_0:
+ case GDISP_ROTATE_180:
+ if (g->g.Orientation == GDISP_ROTATE_90 || g->g.Orientation == GDISP_ROTATE_270) {
+ coord_t tmp;
+
+ tmp = g->g.Width;
+ g->g.Width = g->g.Height;
+ g->g.Height = tmp;
+ }
+ break;
+ case GDISP_ROTATE_90:
+ case GDISP_ROTATE_270:
+ if (g->g.Orientation == GDISP_ROTATE_0 || g->g.Orientation == GDISP_ROTATE_180) {
+ coord_t tmp;
+
+ tmp = g->g.Width;
+ g->g.Width = g->g.Height;
+ g->g.Height = tmp;
+ }
+ break;
+ default:
+ return;
+ }
+ g->g.Orientation = (orientation_t)g->p.ptr;
+ return;
+
+ case GDISP_CONTROL_BACKLIGHT:
+ if ((unsigned)g->p.ptr > 100) g->p.ptr = (void *)100;
+ set_backlight(g, (unsigned)g->p.ptr);
+ g->g.Backlight = (unsigned)g->p.ptr;
+ return;
+
+ case GDISP_CONTROL_CONTRAST:
+ if ((unsigned)g->p.ptr > 100) g->p.ptr = (void *)100;
+ write_cmd(g, PCD8544_SET_VOP | (unsigned)g->p.ptr);
+ g->g.Contrast = (unsigned)g->p.ptr;
+ return;
+ }
+ }
+#endif
+
+#endif // GFX_USE_GDISP
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