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Peripheral Mapping

GP2040-CE Configurator - Peripheral Mapping

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

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.

SDASCLI2C BlockSDASCLI2C Block
GP00GP01I2C0GP02GP03I2C1
GP04GP05I2C0GP06GP07I2C1
GP08GP09I2C0GP10GP11I2C1
GP12GP13I2C0GP14GP15I2C1
GP16GP17I2C0GP18GP19I2C1
GP20GP21I2C0GP22GP23I2C1
GP24GP25I2C0GP26GP27I2C1
GP28GP29I2C0------------

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.

RXCSCLKTXSPI Block
GP00GP01GP02GP03SPI0
GP04GP05GP06GP08SPI0
GP08GP09GP10GP11SPI1
GP12GP13GP14GP15SPI1
GP16GP17GP18GP19SPI0
GP20GP21GP22GP23SPI0
GP24GP25GP26GP27SPI1
GP28GP29--------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.