RE: multi channel SAADC disable in nRF52832

Daewoong Kim — Fri, 04 Sep 2020 05:52:41 GMT

Thanks, Jared

It works well !!

There is no additional current.

I just want to know one more thing...

What is this address 0x40007640 to 0x40007648 ??

I 've confirmed that 0x40007000 is base address of SAADC, but

I couldn't see the information related to offset address 0x640 to 0x648

- D.W Kim

RE: multi channel SAADC disable in nRF52832

Jared — Thu, 03 Sep 2020 07:39:23 GMT

Hi,

I'm suspecting that your issue is caused by the EasyDMA. Could you try to reset the peripheral by adding this code after you uninitialize the peripheral:

volatile uint32_t temp1;
volatile uint32_t temp2;
volatile uint32_t temp3;

temp1 = *(volatile uint32_t *)0x40007640ul;
temp2 = *(volatile uint32_t *)0x40007644ul;
temp3 = *(volatile uint32_t *)0x40007648ul;

*(volatile uint32_t *)0x40007FFCul = 0ul; 
*(volatile uint32_t *)0x40007FFCul; 
*(volatile uint32_t *)0x40007FFCul = 1ul;

*(volatile uint32_t *)0x40007640ul = temp1;
*(volatile uint32_t *)0x40007644ul = temp2;
*(volatile uint32_t *)0x40007648ul = temp3;

The code block will reset the peripheral. Note that you need to re-configure all registers before you use the peripheral again.

regards

Jared