on and off methods added for backlight pin control, firmware updated

README.md

@@ -187,9 +187,13 @@ I couldn't run the display on an SPI with baudrate higher than 40MHZ
 
 This driver supports only 16bit colors in RGB565 notation.
 
-- `ST7789.fill(color)`
+- `ST7789.on()`
 
-  Fill the entire display with the specified color.
+  Turn on the backlight pin if one was defined during init.
+
+- `ST7789.off()`
+
+  Turn off the backlight pin if one was defined during init.
 
 - `ST7789.pixel(x, y, color)`
 

st7789/st7789.c

@@ -51,6 +51,8 @@
 #define DC_HIGH()    (mp_hal_pin_write(self->dc, 1))
 #define RESET_LOW()  { if (self->reset) mp_hal_pin_write(self->reset, 0); }
 #define RESET_HIGH() { if (self->reset) mp_hal_pin_write(self->reset, 1); }
+#define DISP_HIGH()  { if (self->backlight) mp_hal_pin_write(self->backlight, 1); }
+#define DISP_LOW()   { if (self->backlight) mp_hal_pin_write(self->backlight, 0); }
 
 
 STATIC void write_spi(mp_obj_base_t *spi_obj, const uint8_t *buf, int len) {
@@ -821,9 +823,30 @@ STATIC mp_obj_t st7789_ST7789_init(mp_obj_t self_in) {
 
     return mp_const_none;
 }
+
 MP_DEFINE_CONST_FUN_OBJ_1(st7789_ST7789_init_obj, st7789_ST7789_init);
 
 
+STATIC mp_obj_t st7789_ST7789_on(mp_obj_t self_in) {
+    st7789_ST7789_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    DISP_HIGH();
+    mp_hal_delay_ms(10);
+
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_1(st7789_ST7789_on_obj, st7789_ST7789_on);
+
+
+STATIC mp_obj_t st7789_ST7789_off(mp_obj_t self_in) {
+    st7789_ST7789_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    DISP_LOW();
+    mp_hal_delay_ms(10);
+
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_1(st7789_ST7789_off_obj, st7789_ST7789_off);
+
+
 STATIC mp_obj_t st7789_ST7789_hline(size_t n_args, const mp_obj_t *args) {
     st7789_ST7789_obj_t *self = MP_OBJ_TO_PTR(args[0]);
     mp_int_t x = mp_obj_get_int(args[1]);
@@ -1124,6 +1147,8 @@ STATIC const mp_rom_map_elem_t st7789_ST7789_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_set_window), MP_ROM_PTR(&st7789_ST7789_set_window_obj) },
     { MP_ROM_QSTR(MP_QSTR_map_bitarray_to_rgb565), MP_ROM_PTR(&st7789_map_bitarray_to_rgb565_obj) },
     { MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&st7789_ST7789_init_obj) },
+    { MP_ROM_QSTR(MP_QSTR_on), MP_ROM_PTR(&st7789_ST7789_on_obj) },
+    { MP_ROM_QSTR(MP_QSTR_off), MP_ROM_PTR(&st7789_ST7789_off_obj) },
     { MP_ROM_QSTR(MP_QSTR_pixel), MP_ROM_PTR(&st7789_ST7789_pixel_obj) },
     { MP_ROM_QSTR(MP_QSTR_line), MP_ROM_PTR(&st7789_ST7789_line_obj) },
     { MP_ROM_QSTR(MP_QSTR_blit_buffer), MP_ROM_PTR(&st7789_ST7789_blit_buffer_obj) },