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Merge pull request #6821 from haukepetersen/add_stm32l4_hwrng

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boards/cpu: added hwrng for nucleo-l476 / stm32l4
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Hauke Petersen 2017-03-31 11:01:14 +02:00 committed by GitHub
commit cf3cc6e0f8
3 changed files with 5 additions and 1 deletions
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1
boards/nucleo-l476/Makefile.features
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@ -1,6 +1,7 @@
# Put defined MCU peripherals here (in alphabetical order) # Put defined MCU peripherals here (in alphabetical order)
FEATURES_PROVIDED += periph_cpuid FEATURES_PROVIDED += periph_cpuid
FEATURES_PROVIDED += periph_gpio FEATURES_PROVIDED += periph_gpio
FEATURES_PROVIDED += periph_hwrng
FEATURES_PROVIDED += periph_pwm FEATURES_PROVIDED += periph_pwm
FEATURES_PROVIDED += periph_spi FEATURES_PROVIDED += periph_spi
FEATURES_PROVIDED += periph_timer FEATURES_PROVIDED += periph_timer

3
cpu/stm32l4/cpu.c
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@ -143,6 +143,9 @@ static void cpu_clock_init(void)
while (!(RCC->CSR & RCC_CSR_LSIRDY)) {} while (!(RCC->CSR & RCC_CSR_LSIRDY)) {}
#endif #endif
/* select the MSI clock for the 48MHz clock tree (USB, RNG) */
RCC->CCIPR = (RCC_CCIPR_CLK48SEL_0 | RCC_CCIPR_CLK48SEL_1);
/* if configured: enable the HSE clock */ /* if configured: enable the HSE clock */
#if CLOCK_HSE #if CLOCK_HSE
RCC->CR |= RCC_CR_HSEON; RCC->CR |= RCC_CR_HSEON;