kasjer commented on a change in pull request #2017: P-NUCLEO-WB55
URL: https://github.com/apache/mynewt-core/pull/2017#discussion_r334454236
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File path: hw/mcu/stm/stm32wbxx/src/clock_stm32wbxx.c
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@@ -0,0 +1,329 @@
+/*
+ * <h2><center>© COPYRIGHT 2016 STMicroelectronics</center></h2>
+ *
+ * Redistribution and use in source and binary forms, with or without
modification,
+ * are permitted provided that the following conditions are met:
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
notice,
+ * this list of conditions and the following disclaimer in the
documentation
+ * and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its
contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "stm32wbxx_hal_pwr_ex.h"
+#include "stm32wbxx_hal_rcc.h"
+#include "stm32wbxx_hal.h"
+#include <assert.h>
+
+/*
+ * This allows an user to have a custom clock configuration by zeroing
+ * every possible clock source in the syscfg.
+ */
+#if MYNEWT_VAL(STM32_CLOCK_MSI) || MYNEWT_VAL(STM32_CLOCK_HSE) || \
+ MYNEWT_VAL(STM32_CLOCK_LSE) || MYNEWT_VAL(STM32_CLOCK_HSI) || \
+ MYNEWT_VAL(STM32_CLOCK_HSI48) || MYNEWT_VAL(STM32_CLOCK_LSI1) || \
+ MYNEWT_VAL(STM32_CLOCK_LSI2)
+
+#define TRNG_ENABLED (MYNEWT_VAL(TRNG) != 0)
+
+/*
+ * HSI is turned on by default, but can be turned off and use HSE/HSI48
instead.
+ */
+#if (((MYNEWT_VAL(STM32_CLOCK_MSI) != 0) + \
+ (MYNEWT_VAL(STM32_CLOCK_HSE) != 0) + \
+ (MYNEWT_VAL(STM32_CLOCK_HSI) != 0) + \
+ (MYNEWT_VAL(STM32_CLOCK_HSI48) != 0)) < 1)
+#error "At least one of MSI, HSE, HSI or HSI48 clock sources must be enabled"
+#endif
+
+void
+SystemClock_Config(void)
+{
+ RCC_OscInitTypeDef osc_init;
+ RCC_ClkInitTypeDef clk_init;
+ HAL_StatusTypeDef status;
+#if TRNG_ENABLED
+ RCC_PeriphCLKInitTypeDef pclk_init;
+#endif
+
+ /*
+ * The voltage scaling allows optimizing the power consumption when the
+ * device is clocked below the maximum system frequency, to update the
+ * voltage scaling value regarding system frequency refer to product
+ * datasheet.
+ */
+
__HAL_PWR_VOLTAGESCALING_CONFIG(MYNEWT_VAL(STM32_CLOCK_VOLTAGESCALING_CONFIG));
+
+ osc_init.OscillatorType = RCC_OSCILLATORTYPE_NONE;
+
+ /*
+ * LSI1/2 is used to clock the independent watchdog and optionally the RTC.
+ * LSI2 can also be used for auto-wakeup from the RF system. When LSI2 is
+ * enabled LSI1 is automatically enabled no matter which config was set.
+ *
+ * Both can be disabled per user request, but LSI1 is automatically enabled
+ * again when the IWDG is started.
+ *
+ * XXX currently the watchdog is not optional, so there's no point in
+ * disabling LSI1 through syscfg.
+ */
+#if (MYNEWT_VAL(STM32_CLOCK_LSI1) == 0) && (MYNEWT_VAL(STM32_CLOCK_LSI2) == 0)
+
+ osc_init.OscillatorType |= RCC_OSCILLATORTYPE_LSI1 |
RCC_OSCILLATORTYPE_LSI2;
+ osc_init.LSIState = RCC_LSI_OFF;
+
+#else
+
+ osc_init.LSIState = RCC_LSI_ON;
+
+# if MYNEWT_VAL(STM32_CLOCK_LSI1)
+ osc_init.OscillatorType |= RCC_OSCILLATORTYPE_LSI1;
+# endif
+
+# if MYNEWT_VAL(STM32_CLOCK_LSI2)
+# if !IS_RCC_LSI2_CALIBRATION_VALUE(MYNEWT_VAL(STM32_CLOCK_LSI2_CALIBRATION))
+# error "Invalid LSI2 calibration value"
+# endif
+
+ osc_init.OscillatorType |= RCC_OSCILLATORTYPE_LSI2;
+ osc_init.LSI2CalibrationValue = MYNEWT_VAL(STM32_CLOCK_LSI2_CALIBRATION);
+#endif /* MYNEWT_VAL(STM32_CLOCK_LSI2) */
Review comment:
invalid indentation
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