how to enable/disable ppi and gpiote

[steven]

Hi ,everyone:

i design a pwm driver ,that contain one timer(TIMER2) and 4 ppi interface.

1.pwm(ppi and gpiote) Now,i have a problem with it not be Synchronous .when i pause one of pwm pin(by ppi) then reopen( call hal_pwm_go()) it not work correctly. (see the attachment file and follow code) [code type="xml"] uint32_t hal_pwm_Pause(const hal_pwm_init_t* p_params) { .. NRF_PPI->CHEN &= ~(1 << s_ppi_chn[0]);//disable ppi bit NRF_PPI->CHEN &= ~(1 << s_ppi_chn[1]); }

uint32_t hal_pwm_go(const hal_pwm_init_t* p_params) { ... NRF_PPI->CHEN |= (1 << s_ppi_chn[0]);//enable ppi bit NRF_PPI->CHEN |= (1 << s_ppi_chn[1]); }

2.why go to hardfault,when i call sd_softdevice_is_enabled() at ISR(interrupt service routing)? how to do it?

simple_pwm_motor_control_example.zip

[Sébastien Despont]

Hi,

if you are using soft_device, you have to use functions sd_ppi_X to manage the PPI.

[steven]

thank you for your reply quickly. Now,i only try program at not using softdevice. so ,i not call sd_ppi_xx() function to setting the ppi .

[steven]

Hi,

about the second question, i find that is priorities issue. Because when i call sd_xx() function at the lower(prior 3,timer interrupt) that will hardfault error. so i have set that at high prior level(1).

but i can't Explanation the above Figure 71 API call section ,it is ok(low prior application interrupt to svc )?

reference nRF51 reference nrF51_reference_manual.pdf p171 page.