exo: Support uart logging

This can be enabled via compile time flags or exosphere.ini.
Compile time flags override exosphere.ini

Makefile

@@ -67,11 +67,12 @@ CUSTOMDEFINES += -DBL_VER_MJ=$(BLVERSION_MAJOR) -DBL_VER_MN=$(BLVERSION_MINOR) -
 CUSTOMDEFINES += -DNYX_VER_MJ=$(NYXVERSION_MAJOR) -DNYX_VER_MN=$(NYXVERSION_MINOR) -DNYX_VER_HF=$(NYXVERSION_HOTFX) -DNYX_RESERVED=$(NYXVERSION_RSVD)
 CUSTOMDEFINES += -DGFX_INC=$(GFX_INC) -DFFCFG_INC=$(FFCFG_INC)
 
-# 0: UART_A, 1: UART_B.
-#CUSTOMDEFINES += -DDEBUG_UART_PORT=0
-
 #CUSTOMDEFINES += -DDEBUG
 
+# UART Logging: Max baudrate 12.5M.
+# DEBUG_UART_PORT - 0: UART_A, 1: UART_B, 2: UART_C.
+#CUSTOMDEFINES += -DDEBUG_UART_BAUDRATE=115200 -DDEBUG_UART_INVERT=0 -DDEBUG_UART_PORT=0
+
 ARCH := -march=armv4t -mtune=arm7tdmi -mthumb -mthumb-interwork
 CFLAGS = $(ARCH) -O2 -g -nostdlib -ffunction-sections -fdata-sections -fomit-frame-pointer -fno-inline -std=gnu11 -Wall $(CUSTOMDEFINES)
 LDFLAGS = $(ARCH) -nostartfiles -lgcc -Wl,--nmagic,--gc-sections -Xlinker --defsym=IPL_LOAD_ADDR=$(IPL_LOAD_ADDR)

bdk/soc/hw_init.c

@@ -377,7 +377,8 @@ void hw_init()
 
 #ifdef DEBUG_UART_PORT
 	clock_enable_uart(DEBUG_UART_PORT);
-	uart_init(DEBUG_UART_PORT, 115200);
+	uart_init(DEBUG_UART_PORT, DEBUG_UART_BAUDRATE);
+	uart_invert(DEBUG_UART_PORT, DEBUG_UART_INVERT, UART_INVERT_TXD);
 #endif
 
 	// Enable Dynamic Voltage and Frequency Scaling device clock.

bootloader/hos/secmon_exo.c

@@ -82,8 +82,10 @@ typedef struct _exo_cfg_t
 	u32 fwno;
 	u32 flags[2];
 	u16 display_id;
-	u16 rsvd0;
+	u8  uart_port;
-	u32 rsvd1[3];
+	u8  uart_invert;
+	u32 uart_baudrate;
+	u32 rsvd1[2];
 	exo_emummc_config_t emummc_cfg;
 } exo_cfg_t;
 
@@ -244,6 +246,12 @@ void config_exosphere(launch_ctxt_t *ctxt, u32 warmboot_base, bool exo_new)
 				{
 					if (!strcmp("debugmode_user", kv->key))
 						user_debug = atoi(kv->val);
+					else if (!strcmp("log_port", kv->key))
+						exo_cfg->uart_port = atoi(kv->val);
+					else if (!strcmp("log_inverted", kv->key))
+						exo_cfg->uart_invert = atoi(kv->val);
+					else if (!strcmp("log_baud_rate", kv->key))
+						exo_cfg->uart_baudrate = atoi(kv->val);
 					else if (emu_cfg.enabled && !h_cfg.emummc_force_disable)
 					{
 						if (!strcmp("blank_prodinfo_emummc", kv->key))
@@ -345,6 +353,16 @@ void config_exosphere(launch_ctxt_t *ctxt, u32 warmboot_base, bool exo_new)
 		// Set display id.
 		exo_cfg->display_id = display_get_decoded_panel_id();
 	}
+
+#ifdef DEBUG_UART_PORT
+	// Ovverride logging parameters if set in compile time.
+	if (!ctxt->stock)
+	{
+		exo_cfg->uart_port = DEBUG_UART_PORT;
+		exo_cfg->uart_invert = DEBUG_UART_INVERT;
+		exo_cfg->uart_baudrate = DEBUG_UART_BAUDRATE;
+	}
+#endif
 }
 
 static const char *get_error_desc(u32 error_desc)

nyx/Makefile

@@ -80,12 +80,15 @@ CUSTOMDEFINES := -DNYX_LOAD_ADDR=$(NYX_LOAD_ADDR) -DNYX_MAGIC=$(NYX_MAGIC)
 CUSTOMDEFINES += -DNYX_VER_MJ=$(NYXVERSION_MAJOR) -DNYX_VER_MN=$(NYXVERSION_MINOR) -DNYX_VER_HF=$(NYXVERSION_HOTFX) -DNYX_RESERVED=$(NYXVERSION_RSVD)
 CUSTOMDEFINES += -DNYX -DGFX_INC=$(GFX_INC) -DFFCFG_INC=$(FFCFG_INC)
 
-# 0: UART_A, 1: UART_B, 2: UART_C.
-# Also enables LV LOG.
-#CUSTOMDEFINES += -DDEBUG_UART_PORT=1
-
 #CUSTOMDEFINES += -DDEBUG
 
+# UART Logging: Max baudrate 12.5M. Disables Joycon on Nyx if UARTB or UARTC.
+# DEBUG_UART_PORT - 0: UART_A, 1: UART_B, 2: UART_C.
+#CUSTOMDEFINES += -DDEBUG_UART_BAUDRATE=115200 -DDEBUG_UART_INVERT=0 -DDEBUG_UART_PORT=0
+
+# LvGL UART LOG.
+#CUSTOMDEFINES += -DDEBUG_UART_LV_LOG
+
 ARCH := -march=armv4t -mtune=arm7tdmi -mthumb-interwork
 CFLAGS = $(ARCH) -O2 -g -nostdlib -ffunction-sections -fdata-sections -fomit-frame-pointer -std=gnu11 -Wall $(CUSTOMDEFINES)
 LDFLAGS = $(ARCH) -nostartfiles -lgcc -Wl,--nmagic,--gc-sections -Xlinker --defsym=NYX_LOAD_ADDR=$(NYX_LOAD_ADDR)

nyx/nyx_gui/nyx.c

@@ -436,7 +436,8 @@ void ipl_main()
 	#endif
 	pinmux_config_uart(DEBUG_UART_PORT);
 	clock_enable_uart(DEBUG_UART_PORT);
-	uart_init(DEBUG_UART_PORT, 115200);
+	uart_init(DEBUG_UART_PORT, DEBUG_UART_BAUDRATE);
+	uart_invert(DEBUG_UART_PORT, DEBUG_UART_INVERT, UART_INVERT_TXD);
 
 	uart_send(DEBUG_UART_PORT, (u8 *)"hekate-NYX: Hello!\r\n", 20);
 	uart_wait_idle(DEBUG_UART_PORT, UART_TX_IDLE);