want to have 5 channels PWM

[snowbeans]

kit: RF51DK. sdk:nRF51_SDK_8.1.0 SoftDevice:s110_nrf51_8.0.0_softdevice.hex

I want to use 5 channels pwm to control 2 servos and 1 motor;each servo uses 2 channels pwm,so I must
use 5 channels pwm. My way is below:

app_pwm_config_t pwm1_cfg = APP_PWM_DEFAULT_CONFIG_3CH(400, SERVO2_RIGHT_PIN,SERVO2_LEFT_PIN,SERVO1_LEFT_PIN);//2.5kHZ

app_pwm_config_t pwm2_cfg = APP_PWM_DEFAULT_CONFIG_2CH(2000L,MOTOR_PIN,SERVO1_RIGHT_PIN);//503 HZ

the APP_PWM_DEFAULT_CONFIG_3CH is changed from APP_PWM_DEFAULT_CONFIG_2CH, I find out that,i can not have 5th channel. the error code return ,when runs into nrf_drv_gpiote_out_init.

thanks for reply.

[snowbeans]

I have saw devzone.nordicsemi.com/.../ , but it does not solve my problem.

[Wojtek]

I am afraid nRF51 is not the best choice for that , as it doesn't have hardware PWM. It would be hard to generate 5 different PWM channels and run BLE concurrently (if You want to use BLE)

[Anders Strand]

Hi. In nRF51, you can have 2 channels per timer, which makes 4 the total amount of PWM channels you can use. APP_PWM_DEFAULT_CONFIG_3CH is not a valid setting, which is why you are returned an error.

In our next product, the nRF52, you have up to 12 separate pwm channels available.