can I use 3 uart and 2 i2c

RE: can I use 3 uart and 2 i2c

fatalfeel — Tue, 06 Apr 2021 23:19:10 GMT

thanks a lot, same as I think~~~

RE: can I use 3 uart and 2 i2c

Albrecht Markus Schellenberger — Tue, 06 Apr 2021 12:21:03 GMT

Hello,

unfortunately it is not possible to build an application using 3 UARTS and 2 I2C interfaces.

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fps_nrf9160%2Fmemory.html&anchor=topic

As you can see in the instantiation table ID 10, the peripherals UART2 and TWI2 are using the same memory instance.

Cheers!

Markus

RE: can I use 3 uart and 2 i2c

fatalfeel — Mon, 05 Apr 2021 13:38:34 GMT

more info for IRQ

~/ncs/modules/hal/nordic/nrfx/drivers/nrfx_common.h
#define NRFX_IRQ_NUMBER_GET(base_addr) NRFX_PERIPHERAL_ID_GET(base_addr)

~/ncs/nrf/subsys/spm/spm.c
//#define NRFX_PERIPHERAL_ID_GET(base_addr) (uint8_t)((uint32_t)(base_addr) >> 12)

////////////////////////////////////////////////////////////////////////////////
~/ncs/modules/hal/nordic/nrfx/drivers/src/nrfx_twim.c
NRFX_IRQ_ENABLE(nrfx_get_irq_number(p_instance->p_twim));

~/ncs/zephyr/arch/arm/core/aarch32/irq_manage.c
void arch_irq_enable(unsigned int irq)
{
NVIC_EnableIRQ((IRQn_Type)irq);
}