STM32F401 SPI CLK not working

[djerikos]

Hi guys,

I'm currently working on a project where I need to use the SPI protocol. 

After setting everything up in the .ioc file and generating the code. I wanted to check if the clock signal was properly working. So i hooked up my ossciloscop to the clk pin. To my surprise there was nog clk signal being generated.

I've attached a few pictures of the ioc view asswel as the code.

Could you guys help me out on this one?

Kind regards Erik

[djerikos]

Sorry guys forgot the photos

[Tesla DeLorean]

You'll need to be Transmitting something to get clocks.

It would be more helpful to show the code configuring the SPI, peripherals, pins, clocks, and the code transmitting, perhaps a 0x55 pattern, in a continuous loop.

[djerikos]

These are the files with the code, i'm trying to build the same project as Controllerstech in this video:

https://www.youtube.com/watch?v=71SRVEcbEwc

[Chris21]

The for loop in this function doesn't look too good...

void ws2812_spi (int GREEN, int RED, int BLUE)
{
	uint32_t color = GREEN<<16 | RED <<8 | BLUE;
	uint8_t sendData[24];
	int indx = 0;

	for (int i=23; i>=0; i++)
	{
		if(((color>>i)&0x01) == 1) sendData[indx++] = 0b110;
		else sendData[indx++] = 0b100;
	}

	HAL_SPI_Transmit(&hspi1, sendData, 24, 1000);
}

[Tesla DeLorean · Accepted solution]

Incrementing from 23 to the integer limit. Probably getting a Hard Fault and not getting to the HAL_SPI_Transmit() at all.

Hint: not i++