README
======
This README discusses issues unique to NuttX configurations for STM32L476ME
part in the Motorola MDK. This is referred to as the MuC in Motorola
technical documentation.
STM32L476ME:
Microprocessor: 32-bit ARM Cortex M4 at 80MHz STM32L476ME
Memory: 1024 KB Flash and 96+32 KB SRAM
ADC: 3x12-bit, 2.4 MSPS A/D converter: up to 24 channels
DMA: 16-stream DMA controllers with FIFOs and burst support
Timers: Up to 11 timers: up to eight 16-bit, two 32-bit timers, two
watchdog timers, and a SysTick timer
GPIO: Up to 51 I/O ports with interrupt capability
I2C: Up to 3 x I2C interfaces
USARTs: Up to 3 USARTs, 2 UARTs, 1 LPUART
SPIs: Up to 3 SPIs
SAIs: Up to 2 dual-channel audio interfaces
CAN interface
SDIO interface (not connected)
QSPI interface (not connected)
USB: USB 2.0 full-speed device/host/OTG controller with on-chip PHY
CRC calculation unit
RTC
Flashing
========
The MDK has a builtin FTDI to support flashing from openocd. There are a
few extensions to openocd that haven't been integrated upstream yet. To
flash (or debug) the MDK, you will need the code from:
git clone https://github.com/MotorolaMobilityLLC/openocd
Refer to detailed OpenOCD build instructions at developer.motorola.com
After building, you can flash the STM32L476 (MuC) with the following
command:
openocd -f board/moto_mdk_muc.cfg -c "program nuttx.bin 0x08000000 reset exit"
Serial Console
==============
The serial console is configured on USART3 using MUC_UART3_TX (PC10) and
MUC_UART_RX (PC11). This connects to the FT4232 part which supports 4
CDC/ACM serial ports. The MuC console is on port C which will probably be
/dev/ttyUSB2 on your Linux host. Port A (ttyUSB0) is the MuC SWD debug
interface. Ports B and D are the MHB* debug and console ports, respectively.
*Then MHB is the acronym given to Toshiba Interface Bridged, part number
T6WV7XBG. See https://toshiba.semicon-storage.com/us/product/assp/interface-bridge.html
