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path: root/drivers/gdisp/ST7565/gdisp_lld.c
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Diffstat (limited to 'drivers/gdisp/ST7565/gdisp_lld.c')
-rw-r--r--drivers/gdisp/ST7565/gdisp_lld.c269
1 files changed, 269 insertions, 0 deletions
diff --git a/drivers/gdisp/ST7565/gdisp_lld.c b/drivers/gdisp/ST7565/gdisp_lld.c
new file mode 100644
index 00000000..960b1389
--- /dev/null
+++ b/drivers/gdisp/ST7565/gdisp_lld.c
@@ -0,0 +1,269 @@
+/*
+ * 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 || defined(__DOXYGEN__)
+
+
+/* Include the emulation code for things we don't support */
+#include "gdisp/lld/emulation.c"
+#include "st7565.h"
+#include "gdisp_lld_board.h"
+
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+#ifndef GDISP_SCREEN_HEIGHT
+#define GDISP_SCREEN_HEIGHT 64
+#endif
+#ifndef GDISP_SCREEN_WIDTH
+#define GDISP_SCREEN_WIDTH 128
+#endif
+
+#define GDISP_INITIAL_CONTRAST 0xFF
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+// Some common routines and macros
+#define delay(us) gfxSleepMicroseconds(us)
+#define delay_ms(ms) gfxSleepMilliseconds(ms)
+
+// The memory buffer for the display
+static uint8_t gdisp_buffer[GDISP_SCREEN_HEIGHT * GDISP_SCREEN_WIDTH / 8];
+
+/** Set the display to normal or inverse.
+ * @param[in] value 0 for normal mode, or 1 for inverse mode.
+ * @notapi
+ */
+static void invert_display(uint8_t i) {
+ write_cmd(i ? ST7565_INVERT_DISPLAY : ST7565_POSITIVE_DISPLAY);
+}
+
+/** Turn the whole display off.
+ * Sends the display to sleep, but leaves RAM intact.
+ * @notapi
+ */
+static void display_off(void) {
+ write_cmd(ST7565_DISPLAY_OFF);
+}
+
+/** Turn the whole display on.
+ * Wakes up this display following a sleep() call.
+ * @notapi
+ */
+static void display_on(void) {
+ write_cmd(ST7565_DISPLAY_ON);
+}
+
+/** Set the display contrast.
+ * @param[in] value The contrast, from 1 to 63.
+ * @notapi
+ */
+static void set_contrast(uint8_t value) {
+ write_cmd(ST7565_CONTRAST);
+ write_cmd(value & 0x3F);
+}
+
+/** Set the display start line. This is the line at which the display will start rendering.
+ * @param[in] value A value from 0 to 63 denoting the line to start at.
+ * @notapi
+ */
+static void set_display_start_line(unsigned char value) {
+ write_cmd(ST7565_START_LINE | value);
+}
+
+static void gdisp_lld_display(void) {
+ uint8_t p;
+ set_display_start_line(0);
+
+ for (p = 0; p < 8; p++) {
+ write_cmd(ST7565_PAGE | p);
+ write_cmd(ST7565_COLUMN_MSB | 0);
+ write_cmd(ST7565_COLUMN_LSB | 0);
+ write_cmd(ST7565_RMW);
+ write_data(&gdisp_buffer[p * GDISP_SCREEN_WIDTH], GDISP_SCREEN_WIDTH);
+ }
+}
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/* ---- Required Routines ---- */
+/*
+ The following 2 routines are required.
+ All other routines are optional.
+ */
+
+/**
+ * @brief Low level GDISP driver initialization.
+ *
+ * @notapi
+ */
+bool_t gdisp_lld_init(void) {
+ // Initialize your display
+ init_board();
+
+ // Hardware reset.
+ setpin_reset(TRUE);
+ delay_ms(10);
+ setpin_reset(FALSE);
+ delay_ms(1);
+
+ write_cmd(ST7565_LCD_BIAS_7);
+ write_cmd(ST7565_ADC_NORMAL);
+ write_cmd(ST7565_COM_SCAN_INC);
+ set_display_start_line(0);
+
+ set_contrast(32);
+ write_cmd(ST7565_RESISTOR_RATIO | 0x3);
+
+ // turn on voltage converter (VC=1, VR=0, VF=0)
+ write_cmd(ST7565_POWER_CONTROL | 0x04);
+ delay_ms(50);
+ // turn on voltage regulator (VC=1, VR=1, VF=0)
+ write_cmd(ST7565_POWER_CONTROL | 0x06);
+ delay_ms(50);
+ // turn on voltage follower (VC=1, VR=1, VF=1)
+ write_cmd(ST7565_POWER_CONTROL | 0x07);
+ delay_ms(50);
+
+ display_on();
+ write_cmd(ST7565_ALLON_NORMAL);
+ invert_display(0);// Disable Inversion of display.
+
+ write_cmd(ST7565_RMW);
+ gdisp_lld_display();
+
+ // Initialize the GDISP structure
+ GDISP.Width = GDISP_SCREEN_WIDTH;
+ GDISP.Height = GDISP_SCREEN_HEIGHT;
+ GDISP.Orientation = GDISP_ROTATE_0;
+ GDISP.Powermode = powerOn;
+ GDISP.Contrast = 50;
+#if GDISP_NEED_VALIDATION || GDISP_NEED_CLIP
+ GDISP.clipx0 = 0;
+ GDISP.clipy0 = 0;
+ GDISP.clipx1 = GDISP.Width;
+ GDISP.clipy1 = GDISP.Height;
+#endif
+ return TRUE;
+}
+
+/**
+ * @brief Draws a pixel on the display.
+ *
+ * @param[in] x X location of the pixel
+ * @param[in] y Y location of the pixel
+ * @param[in] color The color of the pixel
+ *
+ * @notapi
+ */
+void gdisp_lld_draw_pixel(coord_t x, coord_t y, color_t color) {
+#if GDISP_NEED_VALIDATION || GDISP_NEED_CLIP
+ if (x < GDISP.clipx0 || y < GDISP.clipy0 || x >= GDISP.clipx1 || y >= GDISP.clipy1) return;
+#endif
+
+ if (color == 1)
+ gdisp_buffer[x+ (y/8)*GDISP_SCREEN_WIDTH] |= (1<<y%8);
+ else
+ gdisp_buffer[x+ (y/8)*GDISP_SCREEN_WIDTH] &= ~(1<<y%8);
+}
+
+/* ---- Optional Routines ---- */
+/*
+ All the below routines are optional.
+ Defining them will increase speed but everything
+ will work if they are not defined.
+ If you are not using a routine - turn it off using
+ the appropriate GDISP_HARDWARE_XXXX macro.
+ Don't bother coding for obvious similar routines if
+ there is no performance penalty as the emulation software
+ makes a good job of using similar routines.
+ eg. If gfillarea() is defined there is little
+ point in defining clear() unless the
+ performance bonus is significant.
+ For good performance it is suggested to implement
+ fillarea() and blitarea().
+ */
+
+#if (GDISP_NEED_CONTROL && GDISP_HARDWARE_CONTROL) || defined(__DOXYGEN__)
+/**
+ * @brief Driver Control
+ * @details Unsupported control codes are ignored.
+ * @note The value parameter should always be typecast to (void *).
+ * @note There are some predefined and some specific to the low level driver.
+ * @note GDISP_CONTROL_POWER - Takes a gdisp_powermode_t
+ * GDISP_CONTROL_ORIENTATION - Takes a gdisp_orientation_t
+ * GDISP_CONTROL_BACKLIGHT - Takes an int from 0 to 100. For a driver
+ * that only supports off/on anything other
+ * than zero is on.
+ * GDISP_CONTROL_CONTRAST - Takes an int from 0 to 100.
+ * GDISP_CONTROL_LLD - Low level driver control constants start at
+ * this value.
+ *
+ * @param[in] what What to do.
+ * @param[in] value The value to use (always cast to a void *).
+ *
+ * @notapi
+ */
+void gdisp_lld_control(unsigned what, void *value) {
+ switch(what) {
+ case GDISP_CONTROL_POWER:
+ if (GDISP.Powermode == (gdisp_powermode_t)value)
+ return;
+
+ switch((gdisp_powermode_t)value) {
+ case powerOff:
+ display_off();
+ break;
+ case powerSleep:
+ display_off();
+ break;
+ case powerDeepSleep:
+ display_off();
+ break;
+ case powerOn:
+ display_on();
+ break;
+ default:
+ return;
+ }
+ GDISP.Powermode = (gdisp_powermode_t)value;
+ return;
+
+ case GDISP_CONTROL_BACKLIGHT:
+ set_backlight((uint8_t)(size_t)value);
+ return;
+
+ case GDISP_CONTROL_CONTRAST:
+ if ((unsigned)value > 100) value = (void*)100;
+ if (GDISP.Contrast == (uint8_t)((float)((size_t)value) * 63.0/100.0))
+ return;
+ set_contrast((uint8_t)((float)((size_t)value) * 63.0/100.0) );
+ GDISP.Contrast = (unsigned)value;
+ return;
+
+ case GDISP_CONTROL_LLD_FLUSH:
+ gdisp_lld_display();
+ return;
+ }
+}
+#endif // GDISP_NEED_CONTROL
+
+#endif // GFX_USE_GDISP
+/** @} */
+
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