237 lines
9.7 KiB
Plaintext
237 lines
9.7 KiB
Plaintext
README
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======
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This port is for the FRDM-K28F development board that features the
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MK28FN2M0VMI15 MCU. The features of the FRDM-K28F board are:
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o Kinetis MK28FN2M0VMI15 MCU (ARM Cortex-M4 at150 MHz, 1 MB SRAM, 2 MB flash,
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HS and FS USB, 169 MAPBGA package).
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o Kinetis K20 MCU (K20DX128VFM5) based OpenSDA circuit.
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o Dual-role high-speed and full-speed USB interface with the micro-B USB
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connector via the high-speed switch.
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o One 256 Mbit (32 MB) on-board QuadSPI memory at 1.8 V.
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o One 128 Mbit (16 MB) on-board mobile SDRAM memory at 3.3 V.
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o Multiple independent voltage domains: VDD_CORE, VDD, VBAT, and VDDIO_E.
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o FlexIO socket which enables you to connect an optional TFT Proto 5"
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CAPACITIVE from MikroElektronika (5" display board with capacitive touch).
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o Easy access to the MCU input/output through Arduino R3-compatible I/O
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connectors to connect external add-on boards.
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o Flexible power supply option—OpenSDA v2.2 USB, Kinetis K28 USB, or an
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external source.
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o FXOS8700CQ—6-axis sensor with accelerometer and magnetometer.
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o RGB LED.
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o Two mechanical push-buttons for user input and one for the reset.
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o Programmable OpenSDA v2.2 debug circuit supporting the DAP-Link interface
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software which provides:
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- Mass-Storage Device (MSD) flash programming interface.
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- CMSIS-DAP debug interface over a driverless USB HID connection providing
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run-control debugging and compatibility with the IDE tools.
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- Virtual serial port interface.
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- Open-source CMSIS-DAP software project.
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Contents
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========
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o STATUS
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o Serial Console
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o LEDs and Buttons
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o Configurations
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STATUS
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======
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2018-05-05: The basic NSH port appears to be fully functional. I do see
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one anomaly: There is a significant, long start up delay. This delay
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seems to be variable from immediate to several seconds. I have not
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studied the cause, but there are the symptoms:
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This debug on, I see this output after a reset:
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__start: Reset status: 00:00
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NuttShell (NSH) NuttX-7.24
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nsh> help
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help usage: help [-v] [<cmd>]
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[ cmp false mkdir rm true
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? dirname free mh rmdir uname
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basename dd help mount set umount
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break df hexdump mv source unset
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cat echo kill mw sleep usleep
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cd exec ls ps test xd
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cp exit mb pwd time
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Builtin Apps:
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nsh>
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The delay occurs between the reset and the __start debug output. __start
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is the reset handler so this is very early in the logic. On a reset, it
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vectors to __start. That particular debug message is output after most
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low-level initialization has occurred. So the delay is something within
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the initialization sequence at the beginning of __start. My suspicion is
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the delays associated with the clock configuration.
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Serial Console
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==============
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----- --------------- -------------------------------
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GPIO LPUART FUNCTION BOARD CONFIGURATION
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----- --------------- -------------------------------
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PTA1 LPUART0_RX PTA1 GPIO0
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PTA15 LPUART0_RX PTA15 FXIO0_D21
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PTB14 LPUART0_RX PTB14
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PTB16 LPUART0_RX PTB16 SDRAM_D17
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PTC25 LPUART0_RX PTC25 LPUART0_RX_TGTMCU
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PTD6 LPUART0_RX PTD6 Arduino_D17_ADC0_SE7b
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PTA2 LPUART0_TX PTA2 INT
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PTA14 LPUART0_TX PTA14 FXIO0_D20
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PTB15 LPUART0_TX N/C
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PTB17 LPUART0_TX PTB17 SDRAM_D16
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PTC24 LPUART0_TX PTC24 LPUART0_TX_TGTMCU
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PTD7 LPUART0_TX PTD7 SDRAM_CKE
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PTA3 LPUART0_RTS PTA3
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PTA17 LPUART0_RTS PTA17 FXIO0_D23
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PTB2 LPUART0_RTS PTB2 Arduino_D19_ADC0_SE12/I2C0_SCL/SDRAM_WE
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PTB12 LPUART0_RTS PTB12 Arduino_D5_FTM1_CH0/FTM0_CH4
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PTC27 LPUART0_RTS PTC27 FXOS8700CQ_RESET
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PTD4 LPUART0_RTS PTD4 SDRAM_A10
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PTA0 LPUART0_CTS PTA0 K28F_SWD_CLK
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PTA16 LPUART0_CTS PTA16 FXIO0_D22
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PTB3 LPUART0_CTS PTB3 Arduino_D18_ADC0_SE13/I2C0_SDA/SDRAM_CS0
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PTB13 LPUART0_CTS PTB13 Arduino_D6_FTM1_CH1/FTM0_CH5
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PTC26 LPUART0_CTS PTC26 FXOS8700CQ_INT
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PTD5 LPUART0_CTS PTD5 SDRAM_A9
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----- --------------- -------------------------------
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PTD8 LPUART1_RX PTD8 FXIO0_D24
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PTC3 LPUART1_RX PTC3 CLKOUT
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PTE1 LPUART1_RX PTE1 QSPIA0_SCLK
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PTC4 LPUART1_TX PTC4 SDRAM_A19
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PTD9 LPUART1_TX PTD9 FXIO0_D25
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PTE0 LPUART1_TX PTE0 QSPIA0_DATA3
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PTD10 LPUART1_RTS PTD10 FXIO0_D26
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PTC1 LPUART1_RTS PTC1 SDRAM_A21
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PTE3 LPUART1_RTS PTE3 QSPIA0_DATA2
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PTC2 LPUART1_CTS PTC1 SDRAM_A21
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PTD11 LPUART1_CTS PTD11 FXIO0_D27
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PTE2 LPUART1_CTS PTE2 QSPIA0_DATA0
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----- --------------- -------------------------------
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PTA25 LPUART2_RX PTA25 SDHC0_D0/Arduino_D0_LPUART2_RX
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PTD2 LPUART2_RX PTD2 SDRAM_A12
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PTE13 LPUART2_RX N/C
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PTE17 LPUART2_RX N/C
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PTA24 LPUART2_TX PTA24 SDHC0_D1/Arduino_D1_LPUART2_TX
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PTD3 LPUART2_TX PTD3 SDRAM_A11
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PTE12 LPUART2_TX PTE12 I2S0_TX_BCLK
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PTE16 LPUART2_TX N/C
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PTD0 LPUART2_RTS PTD0 Button_LLWU_P12
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PTA27 LPUART2_RTS PTA27 SDHC0_CMD
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PTE19 LPUART2_RTS N/C
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PTA26 LPUART2_CTS PTA26 SDHC0_DCLK
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PTD1 LPUART2_CTS PTD1 Arduino_D16_ADC0_SE5b
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PTE18 LPUART2_CTS N/C
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----- --------------- -------------------------------
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PTA29 LPUART3_RX PTA29 SDHC0_D2
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PTB10 LPUART3_RX PTB10 SDRAM_D19
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PTC16 LPUART3_RX PTC16 SDRAM_DQM2
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PTE5 LPUART3_RX PTE5 QSPIA0_SS0/USB0_SOF_OUT
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PTA28 LPUART3_TX PTA28 SDHC0_D3
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PTB11 LPUART3_TX PTB11 SDRAM_D18
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PTC17 LPUART3_TX PTC17 SDRAM_DQM3
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PTE4 LPUART3_TX PTE4 QSPIA0_DATA1
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PTB8 LPUART3_RTS PTB8 SDRAM_D21
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PTA31 LPUART3_RTS PTA31
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PTC18 LPUART3_RTS PTC18 Arduino_D7
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PTE7 LPUART3_RTS PTE7 I2S0_RXD0/LEDRGB_GREEN
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PTA30 LPUART3_CTS PTA30
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PTB9 LPUART3_CTS PTB9 SDRAM_D20
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PTC19 LPUART3_CTS PTC19 Arduino_D8
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PTE6 LPUART3_CTS PTE6 I2S0_MCK/LEDRGB_RED
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----- --------------- -------------------------------
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PTA21 LPUART4_RX PTA21 TE/FXIO0_D9
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PTC14 LPUART4_RX PTC14 SDRAM_D25
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PTE21 LPUART4_RX N/C
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PTA20 LPUART4_TX PTA20 RD/FXIO0_D8
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PTC15 LPUART4_TX PTC15 SDRAM_D24
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PTE20 LPUART4_TX N/C
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PTA23 LPUART4_RTS PTA23 WR/FXIO0_D7
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PTC12 LPUART4_RTS PTC12 SDRAM_D27
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PTE23 LPUART4_RTS N/C
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PTA22 LPUART4_CTS PTA22 CS/FXIO0_D6
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PTC13 LPUART4_CTS PTC13 SDRAM_D26
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PTE22 LPUART4_CTS N/C
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----- --------------- -------------------------------
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Arduino RS-232 Shield
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---------------------
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----- --------------- -------------------------------
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GPIO LPUART FUNCTION BOARD CONFIGURATION
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----- --------------- -------------------------------
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PTA25 LPUART2_RX PTA25 SDHC0_D0/Arduino_D0_LPUART2_RX
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PTA24 LPUART2_TX PTA24 SDHC0_D1/Arduino_D1_LPUART2_TX
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----- --------------- -------------------------------
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Note: PTA24 and PTA25 are shared between Micro SD Card circuit and
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Arduino connectors. Remove R106 and R107 or R94 and R11 as necessary to
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prevent contention.
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Virtual serial port
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-------------------
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A serial port connection is available between the OpenSDA v2.2 MCU and
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pins PTC24 and PTC25 of the K28 MCU:
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----- --------------- -------------------------------
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GPIO LPUART FUNCTION BOARD CONFIGURATION
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----- --------------- -------------------------------
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PTC25 LPUART0_RX PTC25 LPUART0_RX_TGTMCU
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PTC24 LPUART0_TX PTC24 LPUART0_TX_TGTMCU
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----- --------------- -------------------------------
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Default Console
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---------------
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Unless otherwise noted, LPUART0 (the virtual serial port) is the console
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used in all Freedom-K28F configurations.
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RGB LED
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-------
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An RGB LED is connected through GPIO as shown below:
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LED K28
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------ -------------------------------------------------------
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RED PTE6
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GREEN PTE7
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BLUE PTE8
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If CONFIG_ARCH_LEDs is defined, then NuttX will control the LED on board
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the Freedom K28. Usage of these LEDs is defined in include/board.h and
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src/k28_leds.c. The following definitions describe how NuttX controls the
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LEDs:
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SYMBOL Meaning LED state
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RED GREEN BLUE
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------------------- ----------------------- -----------------
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LED_STARTED NuttX has been started OFF OFF OFF
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LED_HEAPALLOCATE Heap has been allocated OFF OFF ON
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LED_IRQSENABLED Interrupts enabled OFF OFF ON
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LED_STACKCREATED Idle stack created OFF ON OFF
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LED_INIRQ In an interrupt (no change)
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LED_SIGNAL In a signal handler (no change)
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LED_ASSERTION An assertion failed (no change)
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LED_PANIC The system has crashed FLASH OFF OFF
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LED_IDLE K28 is in sleep mode (Optional, not used)
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Buttons
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-------
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Two push button switches, SW2 and SW3, are available on the FRDM-K28F
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board. SW2 is connected to PTA4 and SW3 is connected to PTD0.
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Beside the general purpose IO function, both SW2 and SW3 can be used
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as a low-leakage wakeup (LLWU) source.
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Switch GPIO Function
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--------- ---------------------------------------------------------------
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SW2 PTA4/NMI_B
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SW3 PTD0/LLWU_P12
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