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trezorhal: remove timer1_get_source_freq function

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Pavol Rusnak 2017-10-17 15:50:45 +02:00
parent 4f16aed757
commit fdafae7d8d
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GPG Key ID: 91F3B339B9A02A3D
1 changed files with 2 additions and 11 deletions
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13
embed/extmod/modtrezorui/display-stm32.h
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@ -24,16 +24,6 @@
#define LED_PWM_TIM_PERIOD (10000)
static uint32_t timer1_get_source_freq() {
uint32_t source;
// TIM1 is on APB2
source = HAL_RCC_GetPCLK2Freq();
if ((uint32_t)((RCC->CFGR & RCC_CFGR_PPRE2) >> 3) != RCC_HCLK_DIV1) {
source *= 2;
}
return source;
}
static void __attribute__((unused)) display_sleep(void) {
#if DISPLAY_ILI9341V || DISPLAY_ST7789V
CMD(0x28); // display off
@ -134,7 +124,8 @@ int display_init(void)
TIM_HandleTypeDef TIM1_Handle;
TIM1_Handle.Instance = TIM1;
TIM1_Handle.Init.Period = LED_PWM_TIM_PERIOD - 1;
TIM1_Handle.Init.Prescaler = timer1_get_source_freq() / 1000000 - 1; // TIM runs at 1MHz
// TIM1/APB2 source frequency equals to SystemCoreClock in our configuration, we want 1 MHz
TIM1_Handle.Init.Prescaler = SystemCoreClock / 1000000 - 1;
TIM1_Handle.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
TIM1_Handle.Init.CounterMode = TIM_COUNTERMODE_UP;
TIM1_Handle.Init.RepetitionCounter = 0;