About TombrownBottom

TombrownBottom · 2024-07-15

I have been looking for software that can take as an input, the PDM output from the MEMS microphone, and convert it to PCM.I then want to implement a double buffer using DMA, to reduce CPU load and output the audio data to the DAC on this PCB.Once I ...

TombrownBottom · 2024-07-07

So as the subject says, my LCD works correctly when attached to my F407 Discovery board and using SPI2.I am now using a F405 and SPI1 on a custom PCB. I have configured the SPI1 the same as SPI2, basically copied the settings.However I need some advi...

TombrownBottom · 2024-07-06

I have an STM32F407 Discovery board. My project works fine using the dicovery board.Now it is time to move it to my own PCB, using a STM32F405.As a board "bring up" I tried to run a simple LED toggle program. When I flash the program I get a Download...

TombrownBottom · 2024-05-23

Hi,I have defined a function, that when called, from the main.c while loop works fine. When the same function is called from an interrupt it fails to work.In debug mode I can see that the interrupt function (void HAL_GPIO_EXTI_Callback(uint16_t GPIO_...

TombrownBottom · 2024-05-17

Here is the method defined in the .h file: void ILI9341_DrawText(const char* str, const uint8_t font[], uint16_t X, uint16_t Y, uint16_t color, uint16_t bgcolor); the method defined in the .c file: void ILI9341_DrawText(const char* str, const uint8_...

TombrownBottom · 2024-07-15

Thanks for that, but Im looking for something more basic for a beginner. Some sample code with process for learning purposes.I'll certainly take a look at the links and do some head sratching....

TombrownBottom · 2024-07-08

So after some use of the oscilloscope I could see that the SPI clock and MOSI were writing the correct byte values for initilisation of the LCD. When it came to writing a buffer I noticed that my DC pin was not going high. When I reviewed the code I ...

TombrownBottom · 2024-07-07

A good suggestion. I will have a go at this tomorrow. Thanks

TombrownBottom · 2024-07-07

I have checked all the connections to the LCD for signals. They are all present.Power and GND is ok. The wiring proves ok. If I decouple the LCD from the custom board and hook it up to the Discovery board the LCD works right off the bat.

TombrownBottom · 2024-07-07

I have set HCLK to 5MHz. Now all clocks are running at 5MHz. This has not delivered the result we were looking for.As an aside I take it that the clocks that are used for SPI1 are:1) HCLK to AHB bus core memory and DMA2) APB1 peripheral clocks3) APB1...

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F407 Discovery - MEMS microphone -DSP-DAC-Headphone (DMA and PDM to PCM, double buffer, half buffer)

My LCD works ok on SPI2 Discovery F407, the same LCD does not work on SPI1 on a F405 custom pcb

My code works when stepping in debug only, does not work in run mode

A function fails when called from an interrupt

Issue casting an integer type to char type/string

Re: F407 Discovery - MEMS microphone -DSP-DAC-Headphone (DMA and PDM to PCM, double buffer, half buffer)

Re: My LCD works ok on SPI2 Discovery F407, the same LCD does not work on SPI1 on a F405 custom pcb

Re: My LCD works ok on SPI2 Discovery F407, the same LCD does not work on SPI1 on a F405 custom pcb

Re: My LCD works ok on SPI2 Discovery F407, the same LCD does not work on SPI1 on a F405 custom pcb

Re: My LCD works ok on SPI2 Discovery F407, the same LCD does not work on SPI1 on a F405 custom pcb