Merge pull request ducalex#66 from Cralex/master

Add Beta MRGC Game Box Mini Target

components/retro-go/config.h

@@ -8,6 +8,8 @@
 #include "targets/retro-esp32.h"
 #elif defined(RG_TARGET_SDL2)
 #include "targets/sdl2.h"
+#elif defined(RG_TARGET_MRGC_GBM)
+#include "targets/mrgc-gbm.h
 #else
 #warning "No target defined. Defaulting to ODROID-GO."
 #include "targets/odroid-go.h"

components/retro-go/targets/mrgc-gbm.h

@@ -0,0 +1,93 @@
+// REF: https://www.myretrogamecase.com/products/game-mini-esp32
+// Original firmware source code: GBA ESP32 link on https://www.myretrogamecase.com/pages/retro-handheld-gaming-firmware
+// Source code is in the "esplay-base-firmware" directory of the .rar archive in the above link.
+
+// Note: As of Late 2022, the owner of this shop has vanished from the net. Orders may not be fulfilled. 
+
+// Known issues:
+// Battery meter needs to be configured.
+// Cropping most noticeable on NES, SNES, Genesis, PC Engine. 
+// Scaling option for above should eventually be removed or changed if downscaling is added.
+// Disk LED does nothing (or isn't mapped yet) and should be removed for this target.
+// Sometimes takes more than one attempt to flash. (Stock bootloader problem? Hardware?)
+// Would benefit from a custom theme for small screens.
+
+
+// Parts:
+// Unknown ESP-32 (Most likely ESP32-WROVER-B) (SOC)
+
+
+// Target definition
+#define RG_TARGET_NAME             "MRGC-GBM"
+
+// Storage
+#define RG_STORAGE_DRIVER           2                   // 0 = Host, 1 = SDSPI, 2 = SDMMC, 3 = USB, 4 = Flash
+#define RG_STORAGE_HOST             SDMMC_HOST_SLOT_1   // Used by SDSPI and SDMMC
+#define RG_STORAGE_SPEED            SDMMC_FREQ_DEFAULT  // Used by SDSPI and SDMMC
+#define RG_STORAGE_ROOT             "/sd"               // Storage mount point
+
+// Audio
+#define RG_AUDIO_USE_INT_DAC        0   // 0 = Disable, 1 = GPIO25, 2 = GPIO26, 3 = Both
+#define RG_AUDIO_USE_EXT_DAC        1   // 0 = Disable, 1 = Enable
+
+// Video
+#define RG_SCREEN_DRIVER            0   // 0 = ILI9341
+#define RG_SCREEN_HOST              SPI2_HOST
+#define RG_SCREEN_SPEED             SPI_MASTER_FREQ_40M
+#define RG_SCREEN_TYPE              5   // Game Box Mini 240x192 screen
+#define RG_SCREEN_WIDTH             240
+#define RG_SCREEN_HEIGHT            230 // Display height 192 plus margin? Was 232
+#define RG_SCREEN_ROTATE            0
+#define RG_SCREEN_MARGIN_TOP        38
+#define RG_SCREEN_MARGIN_BOTTOM     2  // Too little gives you garbage under the bottom bezel.
+#define RG_SCREEN_MARGIN_LEFT       0
+#define RG_SCREEN_MARGIN_RIGHT      0
+
+// Input
+#define RG_GAMEPAD_DRIVER           3   // 1 = ODROID-GO, 2 = Serial, 3 = I2C, 4 = AW9523, 5 = ESPLAY-S3, 6 = SDL2
+#define RG_GAMEPAD_HAS_MENU_BTN     1
+#define RG_GAMEPAD_HAS_OPTION_BTN   0   // The power button does not seem to be mappable.
+/**
+ * The Stock firmware, left to right is:    Start,  Select, Menu,   Power
+ * With the plastic shell, the buttons are: S/P,    Reset,  Sound,  On/Off
+ * Left to right, these buttons are:        (1<<0), (1<<1), (1<<8), null?
+ */
+#define RG_GAMEPAD_MAP_MENU         (1<<8) 
+#define RG_GAMEPAD_MAP_OPTION       (0)
+#define RG_GAMEPAD_MAP_START        (1<<1)
+#define RG_GAMEPAD_MAP_SELECT       (1<<0)
+#define RG_GAMEPAD_MAP_UP           (1<<2)
+#define RG_GAMEPAD_MAP_RIGHT        (1<<5)
+#define RG_GAMEPAD_MAP_DOWN         (1<<3)
+#define RG_GAMEPAD_MAP_LEFT         (1<<4)
+#define RG_GAMEPAD_MAP_A            (1<<6)
+#define RG_GAMEPAD_MAP_B            (1<<7)
+#define RG_GAMEPAD_MAP_X            (0)
+#define RG_GAMEPAD_MAP_Y            (0)
+
+// Battery
+// #define RG_BATTERY_ADC_CHANNEL      ADC1_CHANNEL_0 // Default 0, commented out.
+#define RG_BATTERY_CALC_PERCENT(raw) (((raw) - 170) / 30.f * 100.f)
+#define RG_BATTERY_CALC_VOLTAGE(raw) (0)
+
+// Status LED
+// #define RG_GPIO_LED                 GPIO_NUM_NC
+// #define RG_GPIO_LED                 GPIO_NUM_13 // From OG Firmware
+
+// I2C BUS
+#define RG_GPIO_I2C_SDA             GPIO_NUM_21
+#define RG_GPIO_I2C_SCL             GPIO_NUM_22
+
+// Display
+#define RG_GPIO_LCD_MISO            GPIO_NUM_NC
+#define RG_GPIO_LCD_MOSI            GPIO_NUM_23
+#define RG_GPIO_LCD_CLK             GPIO_NUM_18
+#define RG_GPIO_LCD_CS              GPIO_NUM_5
+#define RG_GPIO_LCD_DC              GPIO_NUM_12
+#define RG_GPIO_LCD_BCKL            GPIO_NUM_27
+
+// External I2S DAC
+#define RG_GPIO_SND_I2S_BCK         GPIO_NUM_26
+#define RG_GPIO_SND_I2S_WS          GPIO_NUM_25
+#define RG_GPIO_SND_I2S_DATA        GPIO_NUM_19
+#define RG_GPIO_SND_AMP_ENABLE      GPIO_NUM_4

rg_tool.py

@@ -131,7 +131,7 @@ def build_firmware(apps, device_type):
         PROJECT_ICON
     ]
 
-    if device_type in ["mrgc-g32", "esplay"]:
+    if device_type in ["mrgc-g32", "esplay", "mrgc-gbm"]:
         args.append("--esplay")
 
     for app in apps: