diff options
Diffstat (limited to 'os/hal/ports/STM32/STM32L4xx+/hal_lld.c')
| -rw-r--r-- | os/hal/ports/STM32/STM32L4xx+/hal_lld.c | 373 |
1 files changed, 373 insertions, 0 deletions
diff --git a/os/hal/ports/STM32/STM32L4xx+/hal_lld.c b/os/hal/ports/STM32/STM32L4xx+/hal_lld.c new file mode 100644 index 000000000..a144142bb --- /dev/null +++ b/os/hal/ports/STM32/STM32L4xx+/hal_lld.c @@ -0,0 +1,373 @@ +/*
+ ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+/**
+ * @file STM32L4xx/hal_lld.c
+ * @brief STM32L4xx HAL subsystem low level driver source.
+ *
+ * @addtogroup HAL
+ * @{
+ */
+
+#include "hal.h"
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/**
+ * @brief CMSIS system core clock variable.
+ * @note It is declared in system_stm32f7xx.h.
+ */
+uint32_t SystemCoreClock = STM32_HCLK;
+
+/*===========================================================================*/
+/* Driver local variables and types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Initializes the backup domain.
+ * @note WARNING! Changing RTC clock source impossible without resetting
+ * of the whole BKP domain.
+ */
+static void hal_lld_backup_domain_init(void) {
+
+ /* Reset BKP domain if different clock source selected.*/
+ if ((RCC->BDCR & STM32_RTCSEL_MASK) != STM32_RTCSEL) {
+ /* Backup domain reset.*/
+ RCC->BDCR = RCC_BDCR_BDRST;
+ RCC->BDCR = 0;
+ }
+
+#if STM32_LSE_ENABLED
+ /* LSE activation.*/
+#if defined(STM32_LSE_BYPASS)
+ /* LSE Bypass.*/
+ RCC->BDCR |= STM32_LSEDRV | RCC_BDCR_LSEON | RCC_BDCR_LSEBYP;
+#else
+ /* No LSE Bypass.*/
+ RCC->BDCR |= STM32_LSEDRV | RCC_BDCR_LSEON;
+#endif
+ while ((RCC->BDCR & RCC_BDCR_LSERDY) == 0)
+ ; /* Wait until LSE is stable. */
+#endif
+
+#if STM32_MSIPLL_ENABLED
+ /* MSI PLL activation depends on LSE. Reactivating and checking for
+ MSI stability.*/
+ RCC->CR |= RCC_CR_MSIPLLEN;
+ while ((RCC->CR & RCC_CR_MSIRDY) == 0)
+ ; /* Wait until MSI is stable. */
+#endif
+
+#if HAL_USE_RTC
+ /* If the backup domain hasn't been initialized yet then proceed with
+ initialization.*/
+ if ((RCC->BDCR & RCC_BDCR_RTCEN) == 0) {
+ /* Selects clock source.*/
+ RCC->BDCR |= STM32_RTCSEL;
+
+ /* RTC clock enabled.*/
+ RCC->BDCR |= RCC_BDCR_RTCEN;
+ }
+#endif /* HAL_USE_RTC */
+}
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Low level HAL driver initialization.
+ *
+ * @notapi
+ */
+void hal_lld_init(void) {
+
+ /* Reset of all peripherals.
+ Note, GPIOs are not reset because initialized before this point in
+ board files.*/
+ rccResetAHB1(~0);
+ rccResetAHB2(~STM32_GPIO_EN_MASK);
+ rccResetAHB3(~0);
+ rccResetAPB1R1(~RCC_APB1RSTR1_PWRRST);
+ rccResetAPB1R2(~0);
+ rccResetAPB2(~0);
+
+ /* PWR clock enabled.*/
+ rccEnablePWRInterface(true);
+
+ /* Initializes the backup domain.*/
+ hal_lld_backup_domain_init();
+
+ /* DMA subsystems initialization.*/
+#if defined(STM32_DMA_REQUIRED)
+ dmaInit();
+#endif
+
+ /* IRQ subsystem initialization.*/
+ irqInit();
+
+ /* Programmable voltage detector enable.*/
+#if STM32_PVD_ENABLE
+ PWR->CR2 = PWR_CR2_PVDE | (STM32_PLS & STM32_PLS_MASK);
+#else
+ PWR->CR2 = 0;
+#endif /* STM32_PVD_ENABLE */
+
+ /* Enabling independent VDDUSB.*/
+#if HAL_USE_USB
+ PWR->CR2 |= PWR_CR2_USV;
+#endif /* HAL_USE_USB */
+
+ /* Enabling independent VDDIO2 required by GPIOG.*/
+#if STM32_HAS_GPIOG
+ PWR->CR2 |= PWR_CR2_IOSV;
+#endif /* STM32_HAS_GPIOG */
+}
+
+/**
+ * @brief STM32L4xx clocks and PLL initialization.
+ * @note All the involved constants come from the file @p board.h.
+ * @note This function should be invoked just after the system reset.
+ *
+ * @special
+ */
+void stm32_clock_init(void) {
+
+#if !STM32_NO_INIT
+ /* PWR clock enable.*/
+#if defined(HAL_USE_RTC) && defined(RCC_APB1ENR1_RTCAPBEN)
+ RCC->APB1ENR1 = RCC_APB1ENR1_PWREN | RCC_APB1ENR1_RTCAPBEN;
+#else
+ RCC->APB1ENR1 = RCC_APB1ENR1_PWREN;
+#endif
+
+ /* Initial clocks setup and wait for MSI stabilization, the MSI clock is
+ always enabled because it is the fall back clock when PLL the fails.
+ Trim fields are not altered from reset values.*/
+
+ /* MSIRANGE can be set only when MSI is OFF or READY.*/
+ RCC->CR = RCC_CR_MSION;
+ while ((RCC->CR & RCC_CR_MSIRDY) == 0)
+ ; /* Wait until MSI is stable. */
+
+ /* Clocking from MSI, in case MSI was not the default source.*/
+ RCC->CFGR = 0;
+ while ((RCC->CFGR & RCC_CFGR_SWS) != RCC_CFGR_SWS_MSI)
+ ; /* Wait until MSI is selected. */
+
+ /* Core voltage setup.*/
+ PWR->CR1 = STM32_VOS;
+ while ((PWR->SR2 & PWR_SR2_VOSF) != 0) /* Wait until regulator is */
+ ; /* stable. */
+
+#if STM32_HSI16_ENABLED
+ /* HSI activation.*/
+ RCC->CR |= RCC_CR_HSION;
+ while ((RCC->CR & RCC_CR_HSIRDY) == 0)
+ ; /* Wait until HSI16 is stable. */
+#endif
+
+#if STM32_CLOCK_HAS_HSI48
+#if STM32_HSI48_ENABLED
+ /* HSI activation.*/
+ RCC->CRRCR |= RCC_CRRCR_HSI48ON;
+ while ((RCC->CRRCR & RCC_CRRCR_HSI48RDY) == 0)
+ ; /* Wait until HSI48 is stable. */
+#endif
+#endif
+
+#if STM32_HSE_ENABLED
+#if defined(STM32_HSE_BYPASS)
+ /* HSE Bypass.*/
+ RCC->CR |= RCC_CR_HSEON | RCC_CR_HSEBYP;
+#endif
+ /* HSE activation.*/
+ RCC->CR |= RCC_CR_HSEON;
+ while ((RCC->CR & RCC_CR_HSERDY) == 0)
+ ; /* Wait until HSE is stable. */
+#endif
+
+#if STM32_LSI_ENABLED
+ /* LSI activation.*/
+ RCC->CSR |= RCC_CSR_LSION;
+ while ((RCC->CSR & RCC_CSR_LSIRDY) == 0)
+ ; /* Wait until LSI is stable. */
+#endif
+
+ /* Backup domain access enabled and left open.*/
+ PWR->CR1 |= PWR_CR1_DBP;
+
+#if STM32_LSE_ENABLED
+ /* LSE activation.*/
+#if defined(STM32_LSE_BYPASS)
+ /* LSE Bypass.*/
+ RCC->BDCR |= STM32_LSEDRV | RCC_BDCR_LSEON | RCC_BDCR_LSEBYP;
+#else
+ /* No LSE Bypass.*/
+ RCC->BDCR |= STM32_LSEDRV | RCC_BDCR_LSEON;
+#endif
+ while ((RCC->BDCR & RCC_BDCR_LSERDY) == 0)
+ ; /* Wait until LSE is stable. */
+#endif
+
+ /* Flash setup for selected MSI speed setting.*/
+ FLASH->ACR = FLASH_ACR_DCEN | FLASH_ACR_ICEN | FLASH_ACR_PRFTEN |
+ STM32_MSI_FLASHBITS;
+
+ /* Changing MSIRANGE to configured value.*/
+ RCC->CR |= STM32_MSIRANGE;
+
+ /* Switching from MSISRANGE to MSIRANGE.*/
+ RCC->CR |= RCC_CR_MSIRGSEL;
+ while ((RCC->CR & RCC_CR_MSIRDY) == 0)
+ ;
+
+ /* MSI is configured SYSCLK source so wait for it to be stable as well.*/
+ while ((RCC->CFGR & RCC_CFGR_SWS) != RCC_CFGR_SWS_MSI)
+ ;
+
+#if STM32_MSIPLL_ENABLED
+ /* MSI PLL (to LSE) activation */
+ RCC->CR |= RCC_CR_MSIPLLEN;
+#endif
+
+ /* Updating MSISRANGE value. MSISRANGE can be set only when MSIRGSEL is high.
+ This range is used exiting the Standby mode until MSIRGSEL is set.*/
+ RCC->CSR |= STM32_MSISRANGE;
+
+#if STM32_ACTIVATE_PLL || STM32_ACTIVATE_PLLSAI1 || STM32_ACTIVATE_PLLSAI2
+ /* PLLM and PLLSRC are common to all PLLs.*/
+#if defined(STM32L496xx) || defined(STM32L4A6xx)
+ RCC->PLLCFGR = STM32_PLLPDIV | STM32_PLLR |
+ STM32_PLLREN | STM32_PLLQ |
+ STM32_PLLQEN | STM32_PLLP |
+ STM32_PLLPEN | STM32_PLLN |
+ STM32_PLLM | STM32_PLLSRC;
+#else
+ RCC->PLLCFGR = STM32_PLLR | STM32_PLLREN |
+ STM32_PLLQ | STM32_PLLQEN |
+ STM32_PLLP | STM32_PLLPEN |
+ STM32_PLLN | STM32_PLLM |
+ STM32_PLLSRC;
+#endif
+#endif
+
+#if STM32_ACTIVATE_PLL
+ /* PLL activation.*/
+ RCC->CR |= RCC_CR_PLLON;
+
+ /* Waiting for PLL lock.*/
+ while ((RCC->CR & RCC_CR_PLLRDY) == 0)
+ ;
+#endif
+
+#if STM32_ACTIVATE_PLLSAI1
+ /* PLLSAI1 activation.*/
+#if defined(STM32L496xx) || defined(STM32L4A6xx)
+ RCC->PLLSAI1CFGR = STM32_PLLSAI1PDIV | STM32_PLLSAI1R |
+ STM32_PLLSAI1REN | STM32_PLLSAI1Q |
+ STM32_PLLSAI1QEN | STM32_PLLSAI1P |
+ STM32_PLLSAI1PEN | STM32_PLLSAI1N;
+#else
+ RCC->PLLSAI1CFGR = STM32_PLLSAI1R | STM32_PLLSAI1REN |
+ STM32_PLLSAI1Q | STM32_PLLSAI1QEN |
+ STM32_PLLSAI1P | STM32_PLLSAI1PEN |
+ STM32_PLLSAI1N;
+#endif
+ RCC->CR |= RCC_CR_PLLSAI1ON;
+
+ /* Waiting for PLL lock.*/
+ while ((RCC->CR & RCC_CR_PLLSAI1RDY) == 0)
+ ;
+#endif
+
+#if STM32_ACTIVATE_PLLSAI2
+ /* PLLSAI2 activation.*/
+#if defined(STM32L496xx) || defined(STM32L4A6xx)
+ RCC->PLLSAI2CFGR = STM32_PLLSAI2PDIV | STM32_PLLSAI2R |
+ STM32_PLLSAI2REN | STM32_PLLSAI2P |
+ STM32_PLLSAI2PEN | STM32_PLLSAI2N;
+#else
+ RCC->PLLSAI2CFGR = STM32_PLLSAI2R | STM32_PLLSAI2REN |
+ STM32_PLLSAI2P | STM32_PLLSAI2PEN |
+ STM32_PLLSAI2N;
+#endif
+ RCC->CR |= RCC_CR_PLLSAI2ON;
+
+ /* Waiting for PLL lock.*/
+ while ((RCC->CR & RCC_CR_PLLSAI2RDY) == 0)
+ ;
+#endif
+
+ /* Other clock-related settings (dividers, MCO etc).*/
+ RCC->CFGR = STM32_MCOPRE | STM32_MCOSEL | STM32_STOPWUCK |
+ STM32_PPRE2 | STM32_PPRE1 | STM32_HPRE;
+
+ /* CCIPR register initialization, note, must take care of the _OFF
+ pseudo settings.*/
+ {
+ uint32_t ccipr = STM32_DFSDMSEL | STM32_SWPMI1SEL | STM32_ADCSEL |
+ STM32_CLK48SEL | STM32_LPTIM2SEL | STM32_LPTIM1SEL |
+ STM32_I2C3SEL | STM32_I2C2SEL | STM32_I2C1SEL |
+ STM32_UART5SEL | STM32_UART4SEL | STM32_USART3SEL |
+ STM32_USART2SEL | STM32_USART1SEL | STM32_LPUART1SEL;
+#if STM32_SAI2SEL != STM32_SAI2SEL_OFF
+ ccipr |= STM32_SAI2SEL;
+#endif
+#if STM32_SAI1SEL != STM32_SAI1SEL_OFF
+ ccipr |= STM32_SAI1SEL;
+#endif
+ RCC->CCIPR = ccipr;
+ }
+
+ /* Set flash WS's for SYSCLK source */
+ if (STM32_FLASHBITS > STM32_MSI_FLASHBITS)
+ FLASH->ACR = (FLASH->ACR & ~FLASH_ACR_LATENCY_Msk) | STM32_FLASHBITS;
+
+ /* Switching to the configured SYSCLK source if it is different from MSI.*/
+#if (STM32_SW != STM32_SW_MSI)
+ RCC->CFGR |= STM32_SW; /* Switches on the selected clock source. */
+ /* Wait until SYSCLK is stable.*/
+ while ((RCC->CFGR & RCC_CFGR_SWS) != (STM32_SW << 2))
+ ;
+#endif
+
+ /* Reduce the flash WS's for SYSCLK source if they are less than MSI WSs */
+ if (STM32_FLASHBITS < STM32_MSI_FLASHBITS)
+ FLASH->ACR = (FLASH->ACR & ~FLASH_ACR_LATENCY_Msk) | STM32_FLASHBITS;
+
+#endif /* STM32_NO_INIT */
+
+ /* SYSCFG clock enabled here because it is a multi-functional unit shared
+ among multiple drivers.*/
+ rccEnableAPB2(RCC_APB2ENR_SYSCFGEN, true);
+}
+
+/** @} */
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