2021-11-15 08:36 AM
Some details:
I connected the AD9954 to STM32f1xx the following way:
/*
** AD9954_CS----------PA4 OUT 14
** AD9954_SCLK--------PA5 OUT 15
** AD9954_SDIO--------PA7 OUT MOSI 17
** AD9954_OSK---------PA6 OUT 16
** PS0----------------PA3 OUT 13
** PS1----------------PA2 OUT 12
** IOUPDATE-----------PA1 OUT 11
** AD9954_SDO---------- IN
** AD9954_IOSY--------PA0 OUT 10 //?
** AD9954_RES---------PB1 OUT 19
** AD9954_PWR---------PB0 OUT 18 //?
*/
#define ssPin 14
#define resetPin 19
#define updatePin 11
#define ps0 13
#define ps1 12
#define osk 16
#define spi_clk 15
Any tips what can be wrong? Do I have a broken DDS module?
I was able to check that AD9954_SCLK appears from STM32 with a scope. Unfortunately my scope setup is not good enough to check all signal timings on SPI properly.
The code I use only sends stuff to AD9954 over SPI... Is there a way to verify if the chip is alive? (i.e receive something from AD9954)
2021-11-15 10:47 AM
>>Is there a way to verify if the chip is alive? (i.e receive something from AD9954)
The data sheet indicates read methods via the SDIO pin, perhaps review/code something that implements that?
https://www.analog.com/media/en/technical-documentation/data-sheets/AD9954.pdf