Button GPIOs can be re-assigned thru CLI

firmware/src/board_defs.h

@@ -12,9 +12,9 @@
 
 #define RGB_PIN 13
 #define RGB_ORDER GRB // or RGB
-#define RGB_BUTTON_MAP { 5, 4, 3, 2, 1, 0, 7, 6, 8, 9, 10 }
+#define RGB_BUTTON_MAP { 5, 4, 3, 2, 1, 0, 7, 6, 8, 9, 10, 11 }
 
-#define BUTTON_DEF { 1, 0, 4, 5, 8, 9, 3, 2, 12, 10, 11}
+#define BUTTON_DEF { 1, 0, 4, 5, 8, 9, 3, 2, 12, 10, 11, 13 }
 
 /* HID Keycode: https://github.com/hathach/tinyusb/blob/master/src/class/hid/hid.h */
 // P1: WEDCXZAQ34 P2: (Numpad)89632147*-

firmware/src/button.c

@@ -16,9 +16,10 @@
 #include "config.h"
 #include "board_defs.h"
 
-static const uint8_t button_gpio[] = BUTTON_DEF;
+static const uint8_t gpio_def[] = BUTTON_DEF;
+static uint8_t gpio_real[] = BUTTON_DEF;
 
-#define BUTTON_NUM (sizeof(button_gpio))
+#define BUTTON_NUM (sizeof(gpio_def))
 
 static bool sw_val[BUTTON_NUM]; /* true if pressed */
 static uint64_t sw_freeze_time[BUTTON_NUM];
@@ -29,7 +30,11 @@ void button_init()
     {
         sw_val[i] = false;
         sw_freeze_time[i] = 0;
-        int8_t gpio = button_gpio[i];
+        uint8_t gpio = mai_cfg->alt.buttons[i];
+        if (gpio > 29) {
+            gpio = gpio_def[i];
+        }
+        gpio_real[i] = gpio;
         gpio_init(gpio);
         gpio_set_function(gpio, GPIO_FUNC_SIO);
         gpio_set_dir(gpio, GPIO_IN);
@@ -42,6 +47,14 @@ uint8_t button_num()
     return BUTTON_NUM;
 }
 
+uint8_t button_gpio(int id)
+{
+    if (id >= BUTTON_NUM) {
+        return 0xff;
+    }
+    return gpio_real[id];
+}
+
 static uint16_t button_reading;
 
 /* If a switch flips, it freezes for a while */
@@ -52,7 +65,7 @@ void button_update()
     uint16_t buttons = 0;
 
     for (int i = BUTTON_NUM - 1; i >= 0; i--) {
-        bool sw_pressed = !gpio_get(button_gpio[i]);
+        bool sw_pressed = !gpio_real[i];
         
         if (now >= sw_freeze_time[i]) {
             if (sw_pressed != sw_val[i]) {

firmware/src/button.h

@@ -14,5 +14,6 @@ void button_init();
 uint8_t button_num();
 void button_update();
 uint16_t button_read();
+uint8_t button_gpio(int id);
 
 #endif

firmware/src/commands.c

@@ -61,9 +61,20 @@ static void disp_hid()
            mai_cfg->hid.nkro <= 2 ? nkro[mai_cfg->hid.nkro] : "key1");
 }
 
+static void disp_gpio()
+{
+    printf("[GPIO]\n");
+    printf("  Main buttons:");
+    for (int i = 0; i < 8; i++) {
+        printf(" %d:%d", i + 1, button_gpio(i));
+    }
+    printf("\n  Test:%d, Service:%d, Navigate:%d, Coin:%d\n",
+        button_gpio(8), button_gpio(9), button_gpio(10), button_gpio(11));
+}
+
 void handle_display(int argc, char *argv[])
 {
-    const char *usage = "Usage: display [rgb|sense|hid]\n";
+    const char *usage = "Usage: display [rgb|sense|hid|gpio]\n";
     if (argc > 1) {
         printf(usage);
         return;
@@ -73,11 +84,12 @@ void handle_display(int argc, char *argv[])
         disp_rgb();
         disp_sense();
         disp_hid();
+        disp_gpio();
         return;
     }
 
-    const char *choices[] = {"rgb", "sense", "hid"};
-    switch (cli_match_prefix(choices, 3, argv[0])) {
+    const char *choices[] = {"rgb", "sense", "hid", "gpio"};
+    switch (cli_match_prefix(choices, 4, argv[0])) {
         case 0:
             disp_rgb();
             break;
@@ -87,6 +99,9 @@ void handle_display(int argc, char *argv[])
         case 2:
             disp_hid();
             break;
+        case 3:
+            disp_gpio();
+            break;
         default:
             printf(usage);
             break;
@@ -368,10 +383,43 @@ static void handle_save()
     save_request(true);
 }
 
-static void handle_joy_reset()
+static void handle_gpio(int argc, char *argv[])
 {
-    config_factory_reset();
-    printf("Factory reset done.\n");
+    const char *usage = "Usage: gpio main <gpio1> <gpio2> ... <gpio8>\n"
+                        "   or: gpio <test|service|navigate|coin> <gpio>\n"
+                        "   gpio: 0..29\n";
+    if (argc == 9) {
+        const char *choices[] = {"main"};
+        if (cli_match_prefix(choices, 1, argv[0]) < 0) {
+            printf(usage);
+            return;
+        }
+        uint8_t gpio_main[8];
+        for (int i = 0; i < 8; i++) {
+            int gpio = cli_extract_non_neg_int(argv[i + 1], 0);
+            if (gpio > 29) {
+                printf(usage);
+                return;
+            }
+            gpio_main[i] = gpio;
+        }
+        memcpy(mai_cfg->alt.buttons, gpio_main, 8);
+    } else if (argc == 2) {
+        const char *choices[] = {"test", "service", "navigate", "coin"};
+        const uint8_t button_pos[] = {8, 9, 10, 11};
+        int match = cli_match_prefix(choices, 4, argv[0]);
+        uint8_t gpio = cli_extract_non_neg_int(argv[1], 0);
+        if ((match < 0) || (gpio > 29)) {
+            printf(usage);
+            return;
+        }
+        mai_cfg->alt.buttons[button_pos[match]] = gpio;
+    } else {
+        printf(usage);
+        return;
+    }
+    config_changed();
+    button_init(); // Re-init the buttons
 }
 
 void commands_init()
@@ -387,5 +435,6 @@ void commands_init()
     cli_register("raw", handle_raw, "Show key raw readings.");
     cli_register("whoami", handle_whoami, "Identify each com port.");
     cli_register("save", handle_save, "Save config to flash.");
+    cli_register("gpio", handle_gpio, "Set GPIO pins for buttons.");
     cli_register("factory", config_factory_reset, "Reset everything to default.");
 }

firmware/src/config.c

@@ -29,7 +29,10 @@ static mai_cfg_t default_cfg = {
     .rgb = {
         .per_button = 1,
         .per_aux = 1,
-    }
+    },
+    .alt = {
+        .buttons = { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
+    },
 };
 
 mai_runtime_t *mai_runtime;

firmware/src/config.h

@@ -30,6 +30,9 @@ typedef struct __attribute__((packed)) {
         uint8_t per_button;
         uint8_t per_aux;
     } rgb;
+    struct {
+        uint8_t buttons[12];
+    } alt;
 } mai_cfg_t;
 
 typedef struct {