Add GPIO1 (UART tx) and GPIO3 (UART rx) finally.

This means all supported GPIO's can be used now.

Be careful with GPIO1 and GPIO3, they share the pins
with the UART. If GPIO1 and/or GPIO3 is enabled, you
can't use the UART.

The UART can still be used for programming, though.

config.h

@@ -11,7 +11,7 @@ enum
 {
 	config_magic = 0x4afc0001,
 	config_major_version = 1,
-	config_minor_version = 1
+	config_minor_version = 2
 };
 
 typedef enum __attribute__ ((__packed__))

gpios.c

@@ -97,6 +97,16 @@ static gpio_trait_t gpio_traits[gpio_size] =
 		.io_mux = PERIPHS_IO_MUX_GPIO0_U,
 		.io_func = FUNC_GPIO0,
 	},
+	{
+		.id = gpio_1,
+		.name = "gpio1",
+		.index = 1,
+		.flags = {
+			.rtc_gpio = 0,
+		},
+		.io_mux = PERIPHS_IO_MUX_U0TXD_U,
+		.io_func = FUNC_GPIO1
+	},
 	{
 		.id = gpio_2,
 		.name = "gpio2",
@@ -107,6 +117,16 @@ static gpio_trait_t gpio_traits[gpio_size] =
 		.io_mux = PERIPHS_IO_MUX_GPIO2_U,
 		.io_func = FUNC_GPIO2,
 	},
+	{
+		.id = gpio_3,
+		.name = "gpio3",
+		.index = 3,
+		.flags = {
+			.rtc_gpio = 0,
+		},
+		.io_mux = PERIPHS_IO_MUX_U0RXD_U,
+		.io_func = FUNC_GPIO3,
+	},
 	{
 		.id = gpio_4,
 		.name = "gpio4",
@@ -234,7 +254,8 @@ irom void gpios_init(void)
 		gpio = &gpio_traits[current];
 		cfg = get_config(gpio);
 
-		select_pin_function(gpio);
+		if(cfg->mode != gpio_disabled)
+			select_pin_function(gpio);
 
 		if(cfg->mode == gpio_counter)
 			state_change_mask |= (1 << gpio->index);

gpios.h

@@ -10,9 +10,17 @@
 typedef enum __attribute__ ((__packed__))
 {
 	gpio_0 = 0,
+	gpio_1,		// UART TX use with care
 	gpio_2,
+	gpio_3,		// UART RX use with care
 	gpio_4,
 	gpio_5,
+//	gpio_6,		// cannot use, used by flash memory
+//	gpio_7,		// cannot use, used by flash memory
+//	gpio_8,		// cannot use, used by flash memory
+//	gpio_9,		// cannot use, used by flash memory
+//	gpio_10,	// cannot use, used by flash memory
+//	gpio_11,	// cannot use, used by flash memory
 	gpio_12,
 	gpio_13,
 	gpio_14,