Zephyr modbus rtu server device tree configuration

RE: Zephyr modbus rtu server device tree configuration

Kazi Afroza Sultana — Fri, 07 Jun 2024 13:25:46 GMT

Hello,

You have found some solution that is really great.

However, the pins can be set correctly in the register and at the same time still be used by other peripheral and not work.

There is an easy way to read register value like

NRF_UARTE1->PSEL.TXD and NRF_UARTE1->PSEL.RXD

RE: Zephyr modbus rtu server device tree configuration

avos — Thu, 06 Jun 2024 14:09:10 GMT

I printed out the uart registers directly:

uint32_t *p = (uint32_t *) (0x40028000 + 0x508);
NRF_LOG_INFO("txd: %d\n", *(p + 1));
NRF_LOG_INFO("rxd: %d\n", *(p + 3));

It showed that the rx and tx pins are correct, so this is not the problem. Sorry to bother you, thanks for the help.

RE: Zephyr modbus rtu server device tree configuration

avos — Tue, 04 Jun 2024 14:17:47 GMT

No, the hardware is fixed, I cannot change that. And as I said, with the nordic code (without zephyr) it works this way. Or is there a problem with zephyr and and p0.4 and p0.5 ?

RE: Zephyr modbus rtu server device tree configuration

Kazi Afroza Sultana — Tue, 04 Jun 2024 14:11:15 GMT

Hello,

Can you use GPIO pin P1.1 as RX and pin p1.2 as TX in the pincontrol file?

uart1_default: uart1_default {
group1 {
psels = <NRF_PSEL(UART_RX, 1, 1)>;
bias-pull-up;
};
group2 {
psels = <NRF_PSEL(UART_TX, 1, 2)>;
};
};

uart1_sleep: uart1_sleep {
group1 {
psels = <NRF_PSEL(UART_RX, 1, 1)>,
<NRF_PSEL(UART_TX, 1, 2)>;
low-power-enable;
};
};