I am working with the STM32F429 and we use the timer pwm output as the ads1271 CLK。 we get the wave as the picture show
We think CLK quality is poor,so the sample rate is inaccurate. Any ideas ?
The main reason is my SPI interrupt function that recieve data from ADS1271 is inefficient. SPI lost samle points, after improve the spi ISR performance,now 4 x 102.4KSPS worked well for me.
are you running your F429 with HSI or HSE?
follow is the clock config
Review PLL parameters (jitter) in DS and compare to your requirements/measurement.
First is to check which SPEED1:0 has been selected for the output pin. (output strength/slew rate)
Retrieving data ...