ST STM32F769I-DISCO
chip:stm32, chip:stm32f7, chip:stm32f769
This page discusses issues unique to NuttX configurations for the STMicro STM32F769I-DISCO development board featuring the STM32F769NIH6 MCU. The STM32F769NIH6 is a 216MHz Cortex-M7 operating with 2048K Flash memory and 512Kb SRAM. The board features:
- On-board ST-LINK/V2 for programming and debugging,
- Mbed-enabled (mbed.org)
- 4-inch 800x472 color LCD-TFT with capacitive touch screen
- SAI audio codec
- Audio line in and line out jack
- Two ST MEMS microphones
- SPDIF RCA input connector
- Two pushbuttons (user and reset)
- 512-Mbit Quad-SPI Flash memory
- 128-Mbit SDRAM
- Connector for microSD card
- RF-EEPROM daughterboard connector
- USB OTG HS with Micro-AB connectors
- Ethernet connector compliant with IEEE-802.3-2002 and PoE
Refer to the http://www.st.com website for further information about this board (search keyword: stm32f769i-disco)
STATUS
2019-06: PWM support has been tested as working.
2017-07: The basic NSH configuration is functional using a serial console on USART1, which is connected to the "virtual com port" of the ST/LINK USB adapter.
2017-07: STM32 F7 Ethernet appears to be functional, but has had only light testing.
Work in progress: Use LCD over DSI interface, rest of board.
Development Environment
The Development environments for the STM32F769I-DISCO board are identical to the environments for other STM32F boards. For full details on the environment options and setup, see the README.txt file in the boards/arm/stm32f7/stm32f769i-disco directory.
LEDs and Buttons
LEDs
The STM32F769I-DISCO board has numerous LEDs but only one, LD3 located near the reset button, that can be controlled by software.
LD3 is controlled by PI1 which is also the SPI2_SCK at the Arduino interface. One end of LD3 is grounded so a high output on PI1 will illuminate the LED.
This LED is not used by the board port unless CONFIG_ARCH_LEDS is defined. In that case, the usage by the board port is defined in include/board.h and src/stm32_leds.c. The LEDs are used to encode OS-related events as follows:
SYMBOL Meaning LD3
LED_STARTED NuttX has been started OFF LED_HEAPALLOCATE Heap has been allocated OFF LED_IRQSENABLED Interrupts enabled OFF LED_STACKCREATED Idle stack created ON LED_INIRQ In an interrupt N/C LED_SIGNAL In a signal handler N/C LED_ASSERTION An assertion failed N/C LED_PANIC The system has crashed FLASH
Thus is LD3 is statically on, NuttX has successfully booted and is, apparently, running normally. If LD3 is flashing at approximately 2Hz, then a fatal error has been detected and the system has halted.
Buttons
Pushbutton B1, labelled "User", is connected to GPIO PI11. A high value will be sensed when the button is depressed.
Serial Console
Use the serial interface the ST/LINK provides to the USB host.
Configurations
Common Configuration Information
Each STM32F769I-DISCO configuration is maintained in a sub-directory and can be selected as follow:
tools/configure.sh stm32f769i-disco:<subdir>
Where <subdir> is one of the sub-directories listed below.
Configuration Directories
nsh
Configures the NuttShell (NSH) located at apps/examples/nsh. The Configuration enables the serial interfaces on UART1. Otherwise nothing is enabled, so that config is a starting point for initial testing. Support for builtin applications is enabled, but in the base configuration no builtin applications are selected.
This config supports the PWM test (apps/examples/pwm) but this must be manually enabled by selecting:
CONFIG_PWM=y : Enable the generic PWM infrastructure CONFIG_EXAMPLES_PWM=y : Enable the PWM example app And these for enabling the STM32 timer PWM channel: CONFIG_STM32F7_TIM1=y CONFIG_STM32F7_TIM1_PWM=y CONFIG_STM32F7_TIM1_CHANNEL=4
nsh-ehternet
Same as above but a lot more hardware peripherals enabled, in particular ethernet, as well as networking stuff.