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| author | Janne Grunau <janne-3d@jannau.net> | 2019-03-24 10:25:56 +0100 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2019-04-05 19:06:15 -0400 |
| commit | aab89e7f85d01fffb349b2046daebdc0deb1ce92 (patch) | |
| tree | c875725a48bce1170d6039103671f7331cb1fda1 /src/linux/gpio.h | |
| parent | e6c3eeafd79cac08172377f447c1dd963b5cb530 (diff) | |
| download | kutter-aab89e7f85d01fffb349b2046daebdc0deb1ce92.tar.gz kutter-aab89e7f85d01fffb349b2046daebdc0deb1ce92.tar.xz kutter-aab89e7f85d01fffb349b2046daebdc0deb1ce92.zip | |
linux: add support for Linux hardware PWM
The replicape servo pins (P9_14/P9_16) are muxed to the SOCs hardware
PWM unit driven by a 13MHz GP timer. They have to be driven by the
linux host mcu. This commits adds hardware PWM support using the linux
sysfs user space interface.
Signed-off-by: Janne Grunau <janne-3d@jannau.net>
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Diffstat (limited to 'src/linux/gpio.h')
| -rw-r--r-- | src/linux/gpio.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/linux/gpio.h b/src/linux/gpio.h index ff8e0cc2..d177581c 100644 --- a/src/linux/gpio.h +++ b/src/linux/gpio.h @@ -28,4 +28,11 @@ void spi_prepare(struct spi_config config); void spi_transfer(struct spi_config config, uint8_t receive_data , uint8_t len, uint8_t *data); +struct gpio_pwm { + int fd; + uint32_t period; +}; +struct gpio_pwm gpio_pwm_setup(uint8_t pin, uint32_t cycle_time, uint16_t val); +void gpio_pwm_write(struct gpio_pwm g, uint16_t val); + #endif // gpio.h |