michaelh/zephyr
1
0
Fork 0
Code Releases Activity

drivers: pwm: pwm_nrf5_sw: Add prescaler support

Browse source 
Add support for specifying the clock prescaler value for the HF timer
used for generating the PWM signals. This allows for lower timer
frequency and thus slower PWM signals (e.g. for use as servo
controller).

Signed-off-by: Henrik Brix Andersen <henrik@brixandersen.dk>
This commit is contained in:
Henrik Brix Andersen 2018-05-31 14:06:20 +02:00 • committed by Carles Cufí
commit fc1898ccb5
2 changed files with 29 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

25
drivers/pwm/Kconfig.nrf5_sw
View file

@ -15,10 +15,33 @@ menuconfig PWM_NRF5_SW
This implementation provides up to 3 pins using one HF timer, two PPI
channels per pin and one GPIOTE config per pin.
if PWM_NRF5_SW
config PWM_NRF5_SW_0_DEV_NAME
string "Nordic Semiconductor nRF5x series S/W PWM Device Name"
depends on PWM_NRF5_SW
default "PWM_0"
help
Specify the device name for the Nordic Semiconductor nRF5x series S/W
PWM driver.
config PWM_NRF5_SW_0_CLOCK_PRESCALER
int
prompt "Nordic Semiconductor nRF5x series S/W PWM Clock Prescaler"
default 0
range 0 9
help
Set the clock prescaler for the timer used for generating
the PWM output signals. Prescaler values correspond to the
following timer frequencies:
0: 16 MHz
1: 8 MHz
2: 4 MHz
3: 2 MHz
4: 1 MHz
5: 500 kHz
6: 250 kHz
7: 125 kHz
8: 62500 Hz
9: 31250 Hz
endif