Software Development
12
SPRUII7 – June 2018
Copyright © 2018, Texas Instruments Incorporated
C2000™ Piccolo™ F28004x Series LaunchPad™ Development Kit
2.3.3.2
EQEP2
GPIO14. GPIO15, and GPIO26 are routed to J13 through U8. By setting position 2 of S3 to 0, the eQEP
signals are routed to J13. In addition to configuring the switches, ensure that the EQEP2 function is
selected in the GPIO Mux.
2.3.4
CAN
The LaunchPad can be connected to a CAN bus through J14. GPIO32 and GPIO33 are routed to the on-
board TI SN65HVD234 3.3 V CAN Transceiver, U10. By setting S9 to 0, GPIO32 and GPIO33 are routed
to the transceiver. If S9 is set to 1, the GPIOs are routed to the BoosterPack connectors. As GPIO33 is
also used by the FSI, ensure that R46 is populated with a 0-
Ω
resistor to connect GPIO33 to the CAN
transceiver.
2.3.5
FSI
One set of GPIOs with available FSI functionality is directly connected to both the BoosterPack connectors
as well as the FSI header, J11. To simplify the layout of the LaunchPad, 0-
Ω
resistors are placed on the
signal trace to remove the BoosterPack Connection from the circuit. The mapping between the GPIOs, the
isolation resistors, and the FSI signal is listed in
. R49 also connects GPIO33 to S9, which selects
the route to the BoosterPack connector or the CAN transceiver.
Table 5. FSI to BoosterPack Isolation Resistors
GPIO
Resistor
FSI Signal
GPIO6
R44
FSITXAD0
GPIO7
R45
FSITXACLK
GPIO12
R47
FSIRXAD0
GPIO33
R46
FSIRXACLK
2.3.6
GPIO18/X2
The F280049C oscillator clock output signal, X2, is multiplexed with GPIO18. By default, the Launchpad
uses an on-board crystal oscillator, Y2, as the clock source for the on-chip Phase-Locked Loop (PLL) that
requires both X1 and X2 signals of the MCU. To balance the requirement of having cleanly routed
oscillator signals and bringing all possible GPIOs to the BoosterPack connectors, GPIO18/X2 can be
routed to the BoosterPack connectors through a 0
Ω
resistor. If GPIO18 is needed at the BoosterPack
connector, the on-chip zero-pin oscillators must be used as the clock source for the on-chip PLL. For more
information on the X1/X2 configurations, see the device-specific data sheet.
If GPIO18 functionality is needed at the BoosterPack Connector:
1. Remove R31 to separate GPIO18 from Y2.
2. Populate R28 to connect GPIO18 to the BoosterPack connector.
3. Populate R35 to connect X1 to Ground.
3
Software Development
This section provides general information about software development, as well as instructions for
programming the LaunchPad.
3.1
Software Description
C2000Ware includes a set of example applications that use the C2000Ware Peripheral Driver Library.
These applications demonstrate the capabilities of the F28004x series MCU, as well as provide a starting
point for the development of the final application for use on the F28004x LaunchPad development board.
Example applications are also provided for the F28004x LaunchPad when paired with selected
BoosterPacks.
