README
======
This port is for the FRDM-K28F development board that features the
MK28FN2M0VMI15 MCU. The features of the FRDM-K28F board are:
o Kinetis MK28FN2M0VMI15 MCU (ARM Cortex-M4 at150 MHz, 1 MB SRAM, 2 MB flash,
HS and FS USB, 169 MAPBGA package).
o Kinetis K20 MCU (K20DX128VFM5) based OpenSDA circuit.
o Dual-role high-speed and full-speed USB interface with the micro-B USB
connector via the high-speed switch.
o One 256 Mbit (32 MB) on-board QuadSPI memory at 1.8 V.
o One 128 Mbit (16 MB) on-board mobile SDRAM memory at 3.3 V.
o Multiple independent voltage domains: VDD_CORE, VDD, VBAT, and VDDIO_E.
o FlexIO socket which enables you to connect an optional TFT Proto 5"
CAPACITIVE from MikroElektronika (5" display board with capacitive touch).
o Easy access to the MCU input/output through Arduino R3-compatible I/O
connectors to connect external add-on boards.
o Flexible power supply option—OpenSDA v2.2 USB, Kinetis K28 USB, or an
external source.
o FXOS8700CQ—6-axis sensor with accelerometer and magnetometer.
o RGB LED.
o Two mechanical push-buttons for user input and one for the reset.
o Programmable OpenSDA v2.2 debug circuit supporting the DAP-Link interface
software which provides:
- Mass-Storage Device (MSD) flash programming interface.
- CMSIS-DAP debug interface over a driverless USB HID connection providing
run-control debugging and compatibility with the IDE tools.
- Virtual serial port interface.
- Open-source CMSIS-DAP software project.
Contents
========
o Serial Console
o LEDs and Buttons
o Configurations
Serial Console
==============
----- --------------- -------------------------------
GPIO LPUART FUNCTION BOARD CONFIGURATION
----- --------------- -------------------------------
PTA1 LPUART0_RX PTA1 GPIO0
PTA15 LPUART0_RX PTA15 FXIO0_D21
PTB14 LPUART0_RX PTB14
PTB16 LPUART0_RX PTB16 SDRAM_D17
PTC25 LPUART0_RX PTC25 LPUART0_RX_TGTMCU
PTD6 LPUART0_RX PTD6 Arduino_D17_ADC0_SE7b
PTA2 LPUART0_TX PTA2 INT
PTA14 LPUART0_TX PTA14 FXIO0_D20
PTB15 LPUART0_TX N/C
PTB17 LPUART0_TX PTB17 SDRAM_D16
PTC24 LPUART0_TX PTC24 LPUART0_TX_TGTMCU
PTD7 LPUART0_TX PTD7 SDRAM_CKE
PTA3 LPUART0_RTS PTA3
PTA17 LPUART0_RTS PTA17 FXIO0_D23
PTB2 LPUART0_RTS PTB2 Arduino_D19_ADC0_SE12/I2C0_SCL/SDRAM_WE
PTB12 LPUART0_RTS PTB12 Arduino_D5_FTM1_CH0/FTM0_CH4
PTC27 LPUART0_RTS PTC27 FXOS8700CQ_RESET
PTD4 LPUART0_RTS PTD4 SDRAM_A10
PTA0 LPUART0_CTS PTA0 K28F_SWD_CLK
PTA16 LPUART0_CTS PTA16 FXIO0_D22
PTB3 LPUART0_CTS PTB3 Arduino_D18_ADC0_SE13/I2C0_SDA/SDRAM_CS0
PTB13 LPUART0_CTS PTB13 Arduino_D6_FTM1_CH1/FTM0_CH5
PTC26 LPUART0_CTS PTC26 FXOS8700CQ_INT
PTD5 LPUART0_CTS PTD5 SDRAM_A9
----- --------------- -------------------------------
PTD8 LPUART1_RX PTD8 FXIO0_D24
PTC3 LPUART1_RX PTC3 CLKOUT
PTE1 LPUART1_RX PTE1 QSPIA0_SCLK
PTC4 LPUART1_TX PTC4 SDRAM_A19
PTD9 LPUART1_TX PTD9 FXIO0_D25
PTE0 LPUART1_TX PTE0 QSPIA0_DATA3
PTD10 LPUART1_RTS PTD10 FXIO0_D26
PTC1 LPUART1_RTS PTC1 SDRAM_A21
PTE3 LPUART1_RTS PTE3 QSPIA0_DATA2
PTC2 LPUART1_CTS PTC1 SDRAM_A21
PTD11 LPUART1_CTS PTD11 FXIO0_D27
PTE2 LPUART1_CTS PTE2 QSPIA0_DATA0
----- --------------- -------------------------------
PTA25 LPUART2_RX PTA25 SDHC0_D0/Arduino_D0_LPUART2_RX
PTD2 LPUART2_RX PTD2 SDRAM_A12
PTE13 LPUART2_RX N/C
PTE17 LPUART2_RX N/C
PTA24 LPUART2_TX PTA24 SDHC0_D1/Arduino_D1_LPUART2_TX
PTD3 LPUART2_TX PTD3 SDRAM_A11
PTE12 LPUART2_TX PTE12 I2S0_TX_BCLK
PTE16 LPUART2_TX N/C
PTD0 LPUART2_RTS PTD0 Button_LLWU_P12
PTA27 LPUART2_RTS PTA27 SDHC0_CMD
PTE19 LPUART2_RTS N/C
PTA26 LPUART2_CTS PTA26 SDHC0_DCLK
PTD1 LPUART2_CTS PTD1 Arduino_D16_ADC0_SE5b
PTE18 LPUART2_CTS N/C
----- --------------- -------------------------------
PTA29 LPUART3_RX PTA29 SDHC0_D2
PTB10 LPUART3_RX PTB10 SDRAM_D19
PTC16 LPUART3_RX PTC16 SDRAM_DQM2
PTE5 LPUART3_RX PTE5 QSPIA0_SS0/USB0_SOF_OUT
PTA28 LPUART3_TX PTA28 SDHC0_D3
PTB11 LPUART3_TX PTB11 SDRAM_D18
PTC17 LPUART3_TX PTC17 SDRAM_DQM3
PTE4 LPUART3_TX PTE4 QSPIA0_DATA1
PTB8 LPUART3_RTS PTB8 SDRAM_D21
PTA31 LPUART3_RTS PTA31
PTC18 LPUART3_RTS PTC18 Arduino_D7
PTE7 LPUART3_RTS PTE7 I2S0_RXD0/LEDRGB_GREEN
PTA30 LPUART3_CTS PTA30
PTB9 LPUART3_CTS PTB9 SDRAM_D20
PTC19 LPUART3_CTS PTC19 Arduino_D8
PTE6 LPUART3_CTS PTE6 I2S0_MCK/LEDRGB_RED
----- --------------- -------------------------------
PTA21 LPUART4_RX PTA21 TE/FXIO0_D9
PTC14 LPUART4_RX PTC14 SDRAM_D25
PTE21 LPUART4_RX N/C
PTA20 LPUART4_TX PTA20 RD/FXIO0_D8
PTC15 LPUART4_TX PTC15 SDRAM_D24
PTE20 LPUART4_TX N/C
PTA23 LPUART4_RTS PTA23 WR/FXIO0_D7
PTC12 LPUART4_RTS PTC12 SDRAM_D27
PTE23 LPUART4_RTS N/C
PTA22 LPUART4_CTS PTA22 CS/FXIO0_D6
PTC13 LPUART4_CTS PTC13 SDRAM_D26
PTE22 LPUART4_CTS N/C
----- --------------- -------------------------------
Arduino RS-232 Shield
---------------------
----- --------------- -------------------------------
GPIO LPUART FUNCTION BOARD CONFIGURATION
----- --------------- -------------------------------
PTA25 LPUART2_RX PTA25 SDHC0_D0/Arduino_D0_LPUART2_RX
PTA24 LPUART2_TX PTA24 SDHC0_D1/Arduino_D1_LPUART2_TX
----- --------------- -------------------------------
Note: PTA24 and PTA25 are shared between Micro SD Card circuit and
Arduino connectors. Remove R106 and R107 or R94 and R11 as necessary to
prevent contention.
Virtual serial port
-------------------
A serial port connection is available between the OpenSDA v2.2 MCU and
pins PTC24 and PTC25 of the K28 MCU:
----- --------------- -------------------------------
GPIO LPUART FUNCTION BOARD CONFIGURATION
----- --------------- -------------------------------
PTC25 LPUART0_RX PTC25 LPUART0_RX_TGTMCU
PTC24 LPUART0_TX PTC24 LPUART0_TX_TGTMCU
----- --------------- -------------------------------
Default Console
---------------
Unless otherwise noted, LPUART0 (the virtual serial port) is the console
used in all Freedom-K28F configurations.
RGB LED
-------
An RGB LED is connected through GPIO as shown below:
LED K28
------ -------------------------------------------------------
RED PTE6
GREEN PTE7
BLUE PTE8
If CONFIG_ARCH_LEDs is defined, then NuttX will control the LED on board
the Freedom K28. Usage of these LEDs is defined in include/board.h and
src/k28_leds.c. The following definitions describe how NuttX controls the
LEDs:
SYMBOL Meaning LED state
RED GREEN BLUE
------------------- ----------------------- -----------------
LED_STARTED NuttX has been started OFF OFF OFF
LED_HEAPALLOCATE Heap has been allocated OFF OFF ON
LED_IRQSENABLED Interrupts enabled OFF OFF ON
LED_STACKCREATED Idle stack created OFF ON OFF
LED_INIRQ In an interrupt (no change)
LED_SIGNAL In a signal handler (no change)
LED_ASSERTION An assertion failed (no change)
LED_PANIC The system has crashed FLASH OFF OFF
LED_IDLE K28 is in sleep mode (Optional, not used)
Buttons
-------
Two push button switches, SW2 and SW3, are available on the FRDM-K28F
board. SW2 is connected to PTA4 and SW3 is connected to PTD0.
Beside the general purpose IO function, both SW2 and SW3 can be used
as a low-leakage wakeup (LLWU) source.
Switch GPIO Function
--------- ---------------------------------------------------------------
SW2 PTA4/NMI_B
SW3 PTD0/LLWU_P12
8c81b97148