MicroPython Forum (Archive)

I've added a basic FSMC module to micropython for a custom board with external SRAM. I've exposed a very simple FSMC.send and .recv. They are currently blocking calls not taking advantage of the DMA. I was thinking of taking the spi module and model the FSMC after it for consistency - a send and rec...

The only real difference I could find - I copied the wrong interrupt handler so it read USART5 instead of UART5.

It is working now. Thanks again for your help.

Thanks. Pins.py will be a handy little script. I forgot to mention that I have disabled the SD card as one of the UART5 pins overlaps with it so I have no external filesystem for now. I guess I ran .af() before I initialized the uart before and got fooled into thinking the alternate function wasn't ...

I was assuming from the af() that the pins were not in alternative function mode but it looks like they are. What does the af() function tell me? >>> import pyb >>> pyb.UART(5,115200) UART(5, baudrate=115384, bits=8, parity=None, stop=1, timeout=1000, timeout_char=0, read_buf_len=64) >>> pyb.Pin.boa...

1. You need to define both the RX and TX pins in the MICROPY_HW_UART5_PINS macro. 2. You will need to add a UART5 irq handler in stm32f4xx_it.c. 3. You need to create and instance of the UART to set it up: pyb.UART(5, 9600). 1. tx and rx pins for uart5 are on different ports PC12 and PD12. I didnt ...

I put the commented out lines back in but the pins still do not get configured for their alternate function. It appears something isn't working in the new code I added to initialize UART5. When I configured the pins manually for their alternate function of uart5 and send bytes to that uart the REPL ...

It looks like those pins are not getting set to their alternate functions: >>> a=pyb.Pin.board.PD2 >>> b=pyb.Pin.board.PC12 >>> a Pin(Pin.cpu.D2, mode=Pin.IN) >>> b Pin(Pin.cpu.C12, mode=Pin.IN) >>> a.af() 0 >>> b.af() 0 >>> a.af_list() [Pin.AF2_TIM3, Pin.AF8_UART5] >>> b.af_list() [Pin.AF6_SPI3, Pi...

I am trying to get UART 5 up and running on a custom board. I've made a couple of modifications but when I .read it always returns with no data and when I .write nothing goes out on uart 5. If anyone can point out where I've gone wrong I'd appreciate it. Is there a way to query the pins to see if th...

REPL and LEDs are working. I slowed it down to 9600 and everything works. Still can't get it going at 115200 for some reason. Something wrong with my clock setup. Thanks for your help.

Okay. I understand how you handle the alternative functions now. Not applicable for that led pin.

Code compiled and programmed on the board. I have a UART on pa9 and 10. I enabled the REPL on uart1 with the compile option in main.c. The UART seems to echo back my characters but no REPL.