QSPI seems to still occupy its pins even if it is disabled.

RE: QSPI seems to still occupy its pins even if it is disabled.

peter_liu — Tue, 28 Sep 2021 08:56:04 GMT

Problem solved, i review the schematic of nRF52840-DK, and find the p0.19 is not connected to gpio header(p24) by default, it is connected to flash. so after i cut the solder bridge SB11 and short SB21, it works.

RE: QSPI seems to still occupy its pins even if it is disabled.

peter_liu — Tue, 28 Sep 2021 08:17:11 GMT

i also tried some other samples, they all have the same symptom.

it's just the p0.19 to p0.23 can't be controlled.

I tested on nRF52840-DK board, i'm not sure if it's because of HW configuration.

i simply use a sample in SDK, (ncs\1.6.1\nrf\sample\peripheral_uart) and add some simple GPIO control codes to test, as below:

const struct device *gpio_devs;
gpio_devs = device_get_binding("GPIO_0");
gpio_pin_configure(gpio_devs, 19, GPIO_OUTPUT);
if(xx)
xx=0;
else xx=1;
if (xx)
gpio_pin_set(gpio_devs,19,1);
else
gpio_pin_set(gpio_devs,19,0);

i put test code in the void ble_write_thread() so that when i tap Enter on uart terminal, the gpio level switches. it works on most other GPIOs but p0.19 to p0.23.

RE: QSPI seems to still occupy its pins even if it is disabled.

Simon — Fri, 24 Sep 2021 11:32:48 GMT

Would you be able to upload a simiplified sample that demonstrates your issue, such that I can investigate it on my side.

Best regards,

Simon