From 52627ecb4bc60e8fa6130ecec95b09764d0781ec Mon Sep 17 00:00:00 2001
From: Jens Scheidemann <nobodyman@gmx.de>
Date: Wed, 25 Dec 2019 21:41:11 +0100
Subject: [PATCH] use 135 x 240 pixel display

---
 st7789/st7789.c | 12 +++++++-----
 st7789/st7789.h |  8 ++------
 2 files changed, 9 insertions(+), 11 deletions(-)

diff --git a/st7789/st7789.c b/st7789/st7789.c
index 7fcdfb9..4230231 100644
--- a/st7789/st7789.c
+++ b/st7789/st7789.c
@@ -92,14 +92,16 @@ STATIC void write_cmd(st7789_ST7789_obj_t *self, uint8_t cmd, const uint8_t *dat
 }
 
 STATIC void set_window(st7789_ST7789_obj_t *self, uint8_t x0, uint8_t y0, uint8_t x1, uint8_t y1) {
-    if (x0 > x1 || x1 > self->width) {
+    if (x0 > x1 || x1 >= self->width) {
         return;
     }
-    if (y0 > y1 || y1 > self->height) {
+    if (y0 > y1 || y1 >= self->height) {
         return;
     }
-    uint8_t bufx[4] = {x0 >> 8, x0 & 0xFF, x1 >> 8, x1 & 0xFF};
-    uint8_t bufy[4] = {y0 >> 8, y0 & 0xFF, y1 >> 8, y1 & 0xFF};
+
+    uint8_t bufx[4] = {(x0+ST7789_XSTART) >> 8, (x0+ST7789_XSTART) & 0xFF, (x1+ST7789_XSTART) >> 8, (x1+ST7789_XSTART) & 0xFF};
+    uint8_t bufy[4] = {(y0+ST7789_YSTART) >> 8, (y0+ST7789_YSTART) & 0xFF, (y1+ST7789_YSTART) >> 8, (y1+ST7789_YSTART) & 0xFF};
+
     write_cmd(self, ST7789_CASET, bufx, 4);
     write_cmd(self, ST7789_RASET, bufy, 4);
     write_cmd(self, ST7789_RAMWR, NULL, 0);
@@ -260,7 +262,7 @@ STATIC mp_obj_t st7789_ST7789_fill(mp_obj_t self_in, mp_obj_t _color) {
     st7789_ST7789_obj_t *self = MP_OBJ_TO_PTR(self_in);
     mp_int_t color = mp_obj_get_int(_color);
 
-    set_window(self, 0, 0, self->width, self->height);
+    set_window(self, 0, 0, self->width - 1, self->height - 1);
     DC_HIGH();
     CS_LOW();
     fill_color_buffer(self->spi_obj, color, self->width * self->height);
diff --git a/st7789/st7789.h b/st7789/st7789.h
index b36e39f..e02400d 100644
--- a/st7789/st7789.h
+++ b/st7789/st7789.h
@@ -5,12 +5,8 @@
 extern "C" {
 #endif
 
-#define ST7789_TFTWIDTH_240 	240
-#define ST7789_TFTHEIGHT_240 	240
-
-#define ST7789_240x240_XSTART 0
-#define ST7789_240x240_YSTART 0
-
+#define ST7789_XSTART 52
+#define ST7789_YSTART 40
 
 // color modes
 #define COLOR_MODE_65K      0x50