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  1. Oct 21, 2014
  2. Oct 20, 2014
    • Gregory Nutt's avatar
      Update ChangeLog · 07ff23d1
      Gregory Nutt authored
      07ff23d1
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      stm32f429i-disco: add wrapper for spi5 evice · 9537715e
      Gregory Nutt authored
      
      
      initializing
      
      As long as the method up_spiinitialize recognized the initialized state of the
      spi device by the spi enable flag of the cr1 register, it isn't safe to disable
      the spi device outside of the nuttx spi interface structure. But this has to be
      done as long as the nuttx spi interface doesn't support bidirectional data
      transfer for multiple devices share one spi bus. This wrapper store the
      initialized state of the spi device after the first initializing and should be
      used by each driver who shares the spi5 bus.
      
      Note! Understand this as temporary workaround.
      
      Signed-off-by: default avatarMarco Krahl <ocram.lhark@gmail.com>
      9537715e
    • Gregory Nutt's avatar
      stm32f429i-disco: add new platform config · c6c5a221
      Gregory Nutt authored
      
      
      This adds a new default platform configuration to support the lcd device
      connected to the stm32f429i-disco board.
      
      Signed-off-by: default avatarMarco Krahl <ocram.lhark@gmail.com>
      c6c5a221
    • Gregory Nutt's avatar
      rivers: enable usage of ili9341 · fa3753c4
      Gregory Nutt authored
      
      
      This enables build and configuration of the ili9341 lcd interface driver.
      
      Signed-off-by: default avatarMarco Krahl <ocram.lhark@gmail.com>
      fa3753c4
    • Gregory Nutt's avatar
      stm32f429i-disco: enable usage of ili93414ws · 7a217f10
      Gregory Nutt authored
      
      
      This enables build and configuration of the ili94314ws sub driver.
      
      Signed-off-by: default avatarMarco Krahl <ocram.lhark@gmail.com>
      7a217f10
    • Gregory Nutt's avatar
      stm32f429i-disco: implements lcd initializing · 17af3884
      Gregory Nutt authored
      
      
      This enables the initializing of the lcd device connected on the
      stm32f429i-disco. The following methods are provided:
      - up_lcdinitialize
      - up_lcduninitialize
      - up_lcdgetdev
      
      The corresponding ili9341 lcd device in the nuttx driver section can be
      configured by Kconfig. Interface 0 is used by default.
      
      Signed-off-by: default avatarMarco Krahl <ocram.lhark@gmail.com>
      17af3884
    • Gregory Nutt's avatar
      drivers: implements lcd interface for ili9341 · beff697b
      Gregory Nutt authored
      
      
      This implements the lcd interface to displaying data on the lcd display powered
      by the ili9341 lcd driver.
      
      This driver implements all methods defined in the lcd_dev_s structure except
      getcontrast and setcontrast. They are not supported by the hardware.
      
      Furthermore the driver allows to use multiple displays powered by the ili9342 IC
      with only one driver instance. So it is theoretically possible to support more
      than one connected ili9341 lcd display. The displays can be configured
      independently. Currently two lcd devices supported. This should be enough for
      now. Read the corresponding code section of how to add more devices if
      neccessary.
      
      The following settings are configurable:
      
      1. Pixel format
         Define the pixel format of the connected display. Currently only
         RGB-565 supported.
      
      2. Orientation
         Define the orientation of the display. This can be portrait or
         landscape and reversed values.
      
      1. Write only
         The driver allows to disable any getrun method if not neccessary to
         reduce code size. This is done by enable CONFIG_LCD_NOGETRUN in the nuttx
         configuration.
      
      Signed-off-by: default avatarMarco Krahl <ocram.lhark@gmail.com>
      beff697b
    • Gregory Nutt's avatar
      stm32f429i-disco: implements ili9341 interface · b8b9834a
      Gregory Nutt authored
      
      
      This add a new sub driver ili93414ws which implements the ili9341
      interface. This allows to control the ili9341 lcd display of the
      stm32f429i-disco board. This also modifies the board specific header to
      make the entry point to the sub driver known.
      
      Generally the display supports two different ways to drawing pixel data. This
      can be done by RGB interface or MCU interface. Second one is supported by this
      driver.
      
      The configuration of the MCU interface is fixed by the hardware pinout.
      In the case of the stm32f429i-disco board it is a 4-wire serial (spi)
      interface. The display is connected on spi5 and acts as a slave device.
      It supports half duplex bidirectional mode for transmitting and receiving data.
      
      Nuttx spi interface only support full duplex so the interface can not be used
      for the driver in conventional way. Therefore the driver has its own logic for
      the communication with the spi5 device.
      
      But if multiple devices share the same spi5 bus, e.g. if MEMS support enabled
      the spi bus must be locked to avoid inconsistency. This is done by enable
      CONFIG_STM32_SPI5 in the nuttx configuration. In this case the driver uses the
      spi_dev_s instance for the spi5 port to interact with the nuttx spi interface,
      e.g. using method SPI_LOCK to lock the bus for the current usage. So it is safe
      to share the spi bus. Keep in mind this is a possible workaround.
      I would be happy if nuttx spi interface supports different spi modes other
      than full duplex only. Are there any plans?
      
      Futhermore the driver supports a few configurable settings:
      
      1. SPI Frequency.
      
      This allows to configure the spi frequency for the communication with the
      display. As a result of the spi devices of the stm32f429 only allow fixed
      frequency by divider depending on PCLK1, it is not possible to configure each
      spi clock we want. A divider of 4, what means ~10Mhz spi clock, gives me the
      best results and should be near the upper limit.
      
      2. SPI 16-bit mode.
      
      This allows to setup the spi hardware to 16-bit mode for read or write
      operations when receiving or transmitting pixel data from or to the gram of the
      display. This is not documented in the ili9341 reference manual but this trick
      works just fine because we use only one read or write operation for each pixel,
      instead two. This gives a small performance boost.
      
      The driver implements all functions described in the header (see
      include/nuttx/lcd/ili9341.h).
      Note! Using the backlight function has no effect, because the board
      doesn't support controlling of the backlight in the current hardware
      layout.
      
      Todo: Add support for dma transfer for writing pixel data to the displays gram.
      
      Signed-off-by: default avatarMarco Krahl <ocram.lhark@gmail.com>
      b8b9834a
    • Gregory Nutt's avatar
      include: adds interface description for ili9341 · f8c4c75c
      Gregory Nutt authored
      
      
      This adds the description of the generic interface to communicate with
      the ili9341 lcd single chip driver used by any displays.
      
      The interface have to be implemented by the platform specific subdriver.
      The following functions must be exported:
      
      -select
       Select the spi device before starting an operations.
      
      -deselect
       Deselect the spi device after operations finished and if the device was
       selected before.
      
      -sendcmd
       Send any command to the ili9341 display driver.
      
      -sendparam
       Send any parameter corresponding to the ili9341 display driver.
      
      -recvparam
       Receive any parameter from the ili9341 display driver. This is only possible
       for the read commands supported by the ili9341.
      
      -sendgram
       Send pixel data to the gram of the display. This i similar to the function
       sendparam, but pixel data operations needs another handling of how to send the
       data to the display.
      
      -recvgram
       Receive pixel data to the gram of the display. This i similar to the function
       recvparam, but pixel data operations needs another handling of how to receive
       the data from the display.
      
      -backlight
       Change the backlight level of the display.
      
      Signed-off-by: default avatarMarco Krahl <ocram.lhark@gmail.com>
      f8c4c75c
    • Gregory Nutt's avatar
      stm32: rename spi frame format definition · 5c20da2a
      Gregory Nutt authored
      
      
      This renames the stm32 spi frame format definition to the short description
      name as well as the other cr2 register flags.
      
      Note! STM32_SPI3_FRF was never used by nuttx somewhere
      
      Signed-off-by: default avatarMarco Krahl <ocram.lhark@gmail.com>
      5c20da2a
    • Gregory Nutt's avatar
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      Update README files · b505c11e
      Gregory Nutt authored
      b505c11e
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      Fix some naming · f754a51d
      Gregory Nutt authored
      f754a51d
    • Gregory Nutt's avatar
      Update ChangeLog · 26acd8d0
      Gregory Nutt authored
      26acd8d0
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      01984fe6
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      4fb5e6d0
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      Update documentation/READMEs · 8c99adf4
      Gregory Nutt authored
      8c99adf4
    • Gregory Nutt's avatar
      Update ChangeLog · a8f2e854
      Gregory Nutt authored
      a8f2e854
    • Gregory Nutt's avatar
      Merge branch 'efm32' · 1f60e401
      Gregory Nutt authored
      1f60e401
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      Finsh USART configuration logic · ba217283
      Gregory Nutt authored
      ba217283
    • Gregory Nutt's avatar
      Add GPIO interrupt logic · 735268d2
      Gregory Nutt authored
      735268d2
    • Gregory Nutt's avatar
      Trivial, cosmetic typos in comments · 57484077
      Gregory Nutt authored
      57484077
    • Gregory Nutt's avatar
      Trivial, cosmetic typos in comments · 7bcca354
      Gregory Nutt authored
      7bcca354