RE: How I can control Pin0.8 Pin0.9 as PWM Channel to output PWM wave I want?

willyoda — Thu, 27 Sep 2018 06:56:31 GMT

thank guys, the reason just is that. I already control the PINS.

RE: How I can control Pin0.8 Pin0.9 as PWM Channel to output PWM wave I want?

hmolesworth — Wed, 26 Sep 2018 16:54:39 GMT

Pins 9 and 10 actually default to NFC pins, so must be reverted to i/o pins before they will be useful on your design. Typically you can do this by defining CONFIG_NFCT_PINS_AS_GPIOS in your project options; this code in system_nrf52.c then puts the pins into the i/o mode.

void SystemInit(void)
{

    /* Configure NFCT pins as GPIOs if NFCT is not to be used in your code. If CONFIG_NFCT_PINS_AS_GPIOS is not defined,
       two GPIOs (see Product Specification to see which ones) will be reserved for NFC and will not be available as
       normal GPIOs. */
    #if defined (CONFIG_NFCT_PINS_AS_GPIOS)
        if ((NRF_UICR->NFCPINS & UICR_NFCPINS_PROTECT_Msk) == (UICR_NFCPINS_PROTECT_NFC << UICR_NFCPINS_PROTECT_Pos)){
            NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen << NVMC_CONFIG_WEN_Pos; // Write Enable
            while (NRF_NVMC->READY == NVMC_READY_READY_Busy){}
            NRF_UICR->NFCPINS &= ~UICR_NFCPINS_PROTECT_Msk;
            while (NRF_NVMC->READY == NVMC_READY_READY_Busy){}
            NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos; // Read-only Enable
            while (NRF_NVMC->READY == NVMC_READY_READY_Busy){}
            // UICR changes require a reset to be effective
            NVIC_SystemReset();
        }
    #endif

RE: How I can control Pin0.8 Pin0.9 as PWM Channel to output PWM wave I want?

WestCoastDaz — Wed, 26 Sep 2018 16:53:04 GMT

Can you please post some of your code? By default pin 9 and 10 and used by the NFC peripheral you need to define CONFIG_NFCT_PINS_AS_GPIOS in your project settings or makefile to get them to be GPIOs.