fix: u8g2初始化256*160的屏幕失败

refer: https://gitee.com/openLuat/LuatOS/issues/I5VY5Z

components/u8g2/luat_lib_u8g2.c

@@ -969,6 +969,9 @@ int luat_u8g2_setup_default(luat_u8g2_conf_t *conf) {
             return -1;
         }
         devreg->devcb(u8g2, conf->direction, u8x8_byte_sw_i2c, u8x8_luat_gpio_and_delay_default);
+        #ifdef U8G2_USE_DYNAMIC_ALLOC
+        u8g2_SetBufferPtr(u8g2, luat_heap_malloc(u8g2_GetBufferSize(u8g2)));
+        #endif
         u8g2->u8x8.pins[U8X8_PIN_I2C_CLOCK] = i2c_scl;
         u8g2->u8x8.pins[U8X8_PIN_I2C_DATA] = i2c_sda;
         u8g2_InitDisplay(u8g2);
@@ -981,6 +984,9 @@ int luat_u8g2_setup_default(luat_u8g2_conf_t *conf) {
             return -1;
         }
         devreg->devcb(u8g2, conf->direction, u8x8_luat_byte_hw_i2c_default, u8x8_luat_gpio_and_delay_default);
+        #ifdef U8G2_USE_DYNAMIC_ALLOC
+        u8g2_SetBufferPtr(u8g2, luat_heap_malloc(u8g2_GetBufferSize(u8g2)));
+        #endif
         LLOGD("setup disp i2c.hw");
         u8g2_InitDisplay(u8g2);
         u8g2_SetPowerSave(u8g2, 0);
@@ -992,6 +998,9 @@ int luat_u8g2_setup_default(luat_u8g2_conf_t *conf) {
             return -1;
         }
         devreg->devcb(u8g2, conf->direction, u8x8_luat_byte_4wire_hw_spi_default, u8x8_luat_gpio_and_delay_default);
+        #ifdef U8G2_USE_DYNAMIC_ALLOC
+        u8g2_SetBufferPtr(u8g2, luat_heap_malloc(u8g2_GetBufferSize(u8g2)));
+        #endif
         LLOGD("setup disp spi.hw  spi_id=%d spi_dc=%d spi_cs=%d spi_res=%d",spi_id,spi_dc,spi_cs,spi_res);
         u8x8_SetPin(u8g2_GetU8x8(u8g2), U8X8_PIN_CS, spi_cs);
         u8x8_SetPin(u8g2_GetU8x8(u8g2), U8X8_PIN_DC, spi_dc);

components/u8g2/u8g2.h

@@ -84,12 +84,12 @@
   Before using any display functions, the dynamic buffer *must* be assigned to the u8g2 struct using the u8g2_SetBufferPtr function.
   When using dynamic allocation, the stack size must be increased by u8g2_GetBufferSize bytes.
  */
-//#define U8G2_USE_DYNAMIC_ALLOC
+#define U8G2_USE_DYNAMIC_ALLOC
 
 /*
   U8G2 uses the same static array
  */
-#define U8G2_USE_ONE_STATIC_BUFF
+// #define U8G2_USE_ONE_STATIC_BUFF
 
 /* U8g2 feature selection, see also https://github.com/olikraus/u8g2/wiki/u8g2optimization */