Working long hours eh? Have fun!! =) Tomek
On Tue, Aug 12, 2025 at 10:23 PM Ludovic Vanasse <lvana...@luxaerobot.com> wrote: > > Well, it's a bit embarrassing, but I found the issue. I'm sorry for not > having thought of that before. > > The issue was that the `echo` command I was doing were enough information for > my logic analyzer to pick up. If I tried the `serialblaster` I was able to > see data on the line. I've confirmed it worked with the `echo` command, just > that I needed a longer string. I was not expecting this to be an issue. > > Sorry again everybody for the disturbance, and thank you for your > understanding. > > Ludovic Vanasse > > Embedded Software Developper > > 1 514 475-0447 > > > > On Tue, Aug 12, 2025 at 2:33 PM Ludovic Vanasse <lvana...@luxaerobot.com> > wrote: >> >> Hi everybody, >> >> I'm working on porting NuttX to the Nucelo-H753ZI and basing it on the >> Nucelo-H743ZI. It's going pretty well. >> >> But now I feel like I've hit a wall, and I am coming here to see if anybody >> has an idea as to what might be the issue. >> >> I'm planning to use NuttX for High Altitude balloons, and I'm preparing the >> groundwork for the rest of my team to then split the work between us. Which >> involve interacting with SATCOM modules, GPS, radios, etc. >> >> And I'm trying to do something very basic, but I'm having issues. I want to >> be able to validate that the UART6 is working well, so I can validate that >> the porting is working for this peripheral. And I'm trying to simply send >> some data down the line with nsh. With this command: >> >> ``` >> nsh> echo "test" > /dev/ttyS1 >> ``` >> >> But I'm not seeing anything on my Saleae logic analyzer. >> >> Here's the configuration I'm using for the UART on the Nucleo-H753ZI: >> >> ``` >> CONFIG_STM32H7_USART3=y >> CONFIG_STM32H7_USART6=y >> >> CONFIG_ARCH_HAVE_SERIAL_TERMIOS=y >> CONFIG_SERIAL=y >> CONFIG_SERIAL_CONSOLE=y >> CONFIG_MCU_SERIAL=y >> CONFIG_STANDARD_SERIAL=y >> CONFIG_SERIAL_NPOLLWAITERS=4 >> CONFIG_USART3_SERIAL_CONSOLE=y >> CONFIG_USART3_SERIALDRIVER=y >> CONFIG_USART6_SERIALDRIVER=y >> >> CONFIG_USART6_RXBUFSIZE=252 >> CONFIG_USART6_TXBUFSIZE=252 >> CONFIG_USART6_BAUD=115200 >> CONFIG_USART6_BITS=8 >> CONFIG_USART6_PARITY=0 >> CONFIG_USART6_2STOP=0 >> ``` >> >> In my board.h I have this configured for the UART6: >> >> ``` >> /* USART6*/ >> #define GPIO_USART6_TX (GPIO_USART6_TX_1 | GPIO_SPEED_100MHz) /* PC6 AF7 >> */ >> #define GPIO_USART6_RX (GPIO_USART6_RX_1 | GPIO_SPEED_100MHz) /* PC7 AF7 */ >> ``` >> Which is based on this config: >> https://os.mbed.com/platforms/ST-Nucleo-H743ZI/, I've also confirmed this in >> ST user manual and datasheets. And it's similar to the initialization of >> that UART in the linum-stm32h753zi: >> https://github.com/apache/nuttx/blob/master/boards/arm/stm32h7/linum-stm32h753bi/include/board.h#L379 >> >> And of course I've configured my Saleae logic analyzer to use 115200 >> baudrate, 8bit, no parity bit. >> >> >> >> >> And here's the NSH where I try to send data down the UART6: >> >> But nothing happens on my Saleae. >> >> I'm at the point of going through GDB and checking if there's indeed data >> being written down the register, but I thought I'd ask the community for >> guidance in resolving this issue in parallel. >> >> Thanks in advance! >> >> Best regards, >> >> Ludovic Vanasse >> >> Embedded Software Developper >> >> 1 514 475-0447 -- CeDeROM, SQ7MHZ, http://www.tomek.cedro.info
