85 lines
2.9 KiB
Plaintext
85 lines
2.9 KiB
Plaintext
README
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======
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This README discusses issues unique to NuttX configurations for STM32L476ME
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part in the Motorola MDK. This is referred to as the MuC in Motorola
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technical documentation.
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STM32L476ME:
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Microprocessor: 32-bit ARM Cortex M4 at 80MHz STM32L476ME
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Memory: 1024 KB Flash and 96+32 KB SRAM
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ADC: 3x12-bit, 2.4 MSPS A/D converter: up to 24 channels
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DMA: 16-stream DMA controllers with FIFOs and burst support
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Timers: Up to 11 timers: up to eight 16-bit, two 32-bit timers, two
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watchdog timers, and a SysTick timer
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GPIO: Up to 51 I/O ports with interrupt capability
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I2C: Up to 3 x I2C interfaces
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USARTs: Up to 3 USARTs, 2 UARTs, 1 LPUART
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SPIs: Up to 3 SPIs
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SAIs: Up to 2 dual-channel audio interfaces
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CAN interface
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SDIO interface (not connected)
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QSPI interface (not connected)
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USB: USB 2.0 full-speed device/host/OTG controller with on-chip PHY
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CRC calculation unit
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RTC
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Flashing
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========
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The MDK has a builtin FTDI to support flashing from openocd. There are a
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few extensions to openocd that haven't been integrated upstream yet. To
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flash (or debug) the MDK, you will need the code from:
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$ git clone https://github.com/MotorolaMobilityLLC/openocd
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Refer to detailed OpenOCD build instructions at developer.motorola.com
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After building, you can flash the STM32L476 (MuC) with the following
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command:
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$ openocd -f board/moto_mdk_muc.cfg -c "program nuttx.bin 0x08000000 reset exit"
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You may need to be super-user in order access the USB device.
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NOTE: In order for the debug Type C connector to power the phone, the DIP
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Switch B4 must be in the ON position. See the MDK User Guide at
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developer.motorola.com for more information on the hardware including the DIP
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switches.
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Or you can use the GDB server. To start the GDB server:
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$ openocd -f board/moto_mdk_mu_reset.cfg &
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Then start GDB:
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$ arm-none-linux-gdb
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(gdb) target extended-remote localhost:3333
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(gdb) set can-use-hw-watchpoints 1
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You can load code into FLASH like:
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(gdb) mon halt
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(gdb) load nuttx
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(gdb) file nuttx
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(gdb) mon reset
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NOTE: There is a special version of GDB 7.11 available with some additional,
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MDK-specific features. It is available in a MotorolaMobilityLLC github.com
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repository.
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Serial Console
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==============
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The serial console is configured on USART3 using MUC_UART3_TX (PC10) and
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MUC_UART_RX (PC11). This connects to the FT4232 part which supports 4
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CDC/ACM serial ports. The MuC console is on port C which will probably be
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/dev/ttyUSB2 on your Linux host. Port A (ttyUSB0) is the MuC SWD debug
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interface. Ports B and D are the MHB* debug and console ports, respectively.
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You may need to be super-user in order access the /dev/ttyUSB2 device.
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*MHB is the acronym given to Toshiba Interface Bridge, part number T6WV7XBG.
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See https://toshiba.semicon-storage.com/us/product/assp/interface-bridge.html
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