diff options
Diffstat (limited to 'chip/stm32/pwm.c')
| -rw-r--r-- | chip/stm32/pwm.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/chip/stm32/pwm.c b/chip/stm32/pwm.c index 19740a42bd..073e2df511 100644 --- a/chip/stm32/pwm.c +++ b/chip/stm32/pwm.c @@ -47,7 +47,7 @@ static void pwm_configure(enum pwm_channel ch) if (using_pwm[ch]) return; -#ifdef CHIP_FAMILY_STM32F +#if defined(CHIP_FAMILY_STM32F) if (mask < 0x100) { gpio_cr = &STM32_GPIO_CRL(gpio->port); } else { @@ -63,7 +63,9 @@ static void pwm_configure(enum pwm_channel ch) val = *gpio_cr & ~(mask * 0xf); val |= mask * 0x9; *gpio_cr = val; -#else /* stm32l or stm32f0 */ +#elif defined(CHIP_FAMILY_STM32F0) + gpio_set_alternate_function(gpio->port, gpio->mask, pwm->gpio_alt_func); +#else /* stm32l */ gpio_set_alternate_function(gpio->port, gpio->mask, GPIO_ALT_TIM(pwm->tim.id)); #endif @@ -101,6 +103,13 @@ static void pwm_configure(enum pwm_channel ch) else tim->ccer = 1 << (pwm->channel * 4 - 4); + /* + * Main output enable. + * TODO(shawnn): BDTR is undocumented on STM32L. Verify this isn't + * harmful on STM32L. + */ + tim->bdtr |= (1 << 15); + /* Generate update event to force loading of shadow registers */ tim->egr |= 1; @@ -118,6 +127,9 @@ static void pwm_disable(enum pwm_channel ch) if (using_pwm[ch] == 0) return; + /* Main output disable */ + tim->bdtr &= ~(1 << 15); + /* Disable counter */ tim->cr1 &= ~0x1; |