Peripheral Mapping

Here you can assign the GPIO pins necessary for using input modes, peripherals, and add-ons that require I2C and a USB host port. These include, but are not limited to

• PS4 Input Mode
• PS5 Input Mode
• OLED Display
• I2C Analog ADS1219
• Xbox One Input Mode
• Keyboard Host Add-on

info

Click on the (i) tool tip in the Web Configurator for more information on the various settings

I2C

Each I2C block, I2C0 and I2C1, has separate settings and each must be configured before using the respective I2C block. These must be configured properly before any feature or add-on that uses I2C can be used.

• Toggle - This will toggle a specific I2C block on and off
• SDA - The GPIO pin used for Serial Data (SDA).
• SCL - The GPIO pin used for Serial clock (SCL).
• Speed - Sets the speed of I2C communication.
  • Normal - 100000
  • Fast - 400000
  • Fast Plus - 800000

caution

The SDA and SCL pins must match a pair found on the table below for each I2C block. If this is not configured correctly, your I2C devices will not function properly.

SDA	SCL	I2C Block	SDA	SCL	I2C Block
GP00	GP01	I2C0	GP02	GP03	I2C1
GP04	GP05	I2C0	GP06	GP07	I2C1
GP08	GP09	I2C0	GP10	GP11	I2C1
GP12	GP13	I2C0	GP14	GP15	I2C1
GP16	GP17	I2C0	GP18	GP19	I2C1
GP20	GP21	I2C0	GP22	GP23	I2C1
GP24	GP25	I2C0	GP26	GP27	I2C1
GP28	GP29	I2C0	----	----	----

SPI

Each SPI block, SPI0 and SPI1, has separate settings and must be configured before using the respective SPI block. These must be configured properly before any feature or add-on that uses SPI can be used.

• Toggle - This will toggle a specific SPI block on and off
• RX - The GPIO pin used for MISO, to receive data.
• CS - The GPIO pin used for Chip Select (CS).
• SCK - The GPIO pin used for Serial Clock (SCK).
• TX - The GPIO pin used for MOSI, to send data.

caution

The pins must match a set found on the table below for each SPI block. If this is not configured correctly, your SPI devices will not function properly.

RX	CS	CLK	TX	SPI Block
GP00	GP01	GP02	GP03	SPI0
GP04	GP05	GP06	GP08	SPI0
GP08	GP09	GP10	GP11	SPI1
GP12	GP13	GP14	GP15	SPI1
GP16	GP17	GP18	GP19	SPI0
GP20	GP21	GP22	GP23	SPI0
GP24	GP25	GP26	GP27	SPI1
GP28	GP29	----	----	SPI1

USB Host

There are not restrictions on which GPIO pins can be used for setting up a USB host port. You can pick any GPIO pin as long as it is available (not being used by any other feature) and the GPIO pin selected for D+ has a GPIO pin immediately following or preceding it that can be used for D- (e.g. GPIO X and GPIO X+/-1).

• Toggle - This will toggle the USB Host Port on and off
• D+ - The GPIO Pin used to carry Data Plus between the USB Host Port and RP2040
• Enable 5V - The GPIO Pin used to enable 5V power to the host port on the board.
• Pin Order - This setting is based on the order that the Data pins are connected to sequential GPIO pins
  • D+/D- - The GPIO pins are set such that, sequentially, D+ is immediately followed by D- (e.g. D+ = 0. D- = 1)
  • D-/D+ -The GPIO pins are set such that, sequentially, D+ is immediately preceded by D- (e.g. D+ = 29, D- = 28)

Enable 5V

Most boards do not require this to be set. This is only applicable to a small number of boards (e.g. Adafruit RP2040 Feather USB Host) as they possess pins for enabling and disabling 5V port on the USB host port.