Add st7789 lcd driver

include/framebuffer.h

@@ -0,0 +1,12 @@
+#ifndef __INCLUDE_FRAMEBUFFER_H__
+#define __INCLUDE_FRAMEBUFFER_H__
+
+#include <stdint.h>
+
+void fb_draw_pixel(uint16_t *image, uint16_t x, uint16_t y, uint16_t color);
+void fb_draw_line(uint16_t *image, int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_t color);
+
+void fb_load_image(uint16_t *dst, uint16_t *src, uint32_t length);
+void fb_set_image(uint16_t *dst, uint16_t value, uint32_t length);
+
+#endif

include/platform/nrf52/nrf52-dk.h

@@ -5,6 +5,7 @@
 
 #include "gpio.h"
 #include "spi.h"
+#include "st7789.h"
 
 // LED 1
 const struct gpio nrf_led_1 = {
@@ -50,6 +51,8 @@ const struct driver led_4 = {
     .dev = &nrf_led_4
 };
 
+// LCD
+// SPI 0
 const struct spi nrf_spi_0 = {
     .sck_pin = 2,
     .mosi_pin = 3,
@@ -60,5 +63,55 @@ const struct driver spi_0 = {
     .fp = &spi_fp,
     .dev = &nrf_spi_0
 };
+const struct gpio nrf_dc_pin = {
+    .pin = 18,
+    .dir = OUT
+};
+const struct driver dc_pin = {
+    .name = "DC",
+    .fp = &gpio_fp,
+    .dev = &nrf_dc_pin
+};
+const struct gpio nrf_bl_pin = {
+    .pin = 23,
+    .dir = OUT
+};
+const struct driver bl_pin = {
+    .name = "BACKLIGHT",
+    .fp = &gpio_fp,
+    .dev = &nrf_bl_pin
+};
+const struct gpio nrf_rst_pin = {
+    .pin = 26,
+    .dir = OUT
+};
+const struct driver rst_pin = {
+    .name = "RESET",
+    .fp = &gpio_fp,
+    .dev = &nrf_rst_pin
+};
+const struct gpio nrf_select_pin = {
+    .pin = 25,
+    .dir = OUT
+};
+const struct driver select_pin = {
+    .name = "SELECT",
+    .fp = &gpio_fp,
+    .dev = &nrf_select_pin
+};
+struct st7789 nrf_lcd = {
+    .spi = &spi_0,
+    .dc = &dc_pin,
+    .bl = &bl_pin,
+    .rst = &rst_pin,
+    .select = &select_pin,
+    .height = 240,
+    .width = 240,
+};
+const struct driver lcd = {
+    .name = "LCD",
+    .fp = &st7789_fp,
+    .dev = &nrf_lcd
+};
 
 #endif

include/st7789.h

@@ -0,0 +1,30 @@
+#ifndef __ST7789_H__
+#define __ST7789_H__
+
+#include <stddef.h>
+
+#include "driver.h"
+
+int st7789_open(const struct driver *drv);
+int st7789_close(const struct driver *drv);
+int st7789_write(const struct driver *drv, const char *buffer, unsigned int len);
+
+struct st7789 {
+    const struct driver *spi;
+    const struct driver *dc;
+    const struct driver *bl;
+    const struct driver *rst;
+    const struct driver *select;
+    unsigned int height;
+    unsigned int width;
+};
+
+static const struct driver_fp st7789_fp = {
+    .open = st7789_open,
+    .close = st7789_close,
+    .read = NULL,
+    .write = st7789_write,
+    .ioctl = NULL,
+};
+
+#endif