WIP simple C-based library for hacking on the watch

Smol Watch Project/My Project/hpl/pm/hpl_pm.c

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+
+/**
+ * \file
+ *
+ * \brief SAM Power manager
+ *
+ * Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Subject to your compliance with these terms, you may use Microchip
+ * software and any derivatives exclusively with Microchip products.
+ * It is your responsibility to comply with third party license terms applicable
+ * to your use of third party software (including open source software) that
+ * may accompany Microchip software.
+ *
+ * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
+ * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
+ * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
+ * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
+ * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
+ * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
+ * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
+ * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
+ * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
+ * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
+ * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
+ *
+ * \asf_license_stop
+ *
+ */
+
+#include <hpl_sleep.h>
+#include <hpl_reset.h>
+#include <hpl_init.h>
+
+/**
+ * \brief Retrieve the reset reason
+ */
+enum reset_reason _get_reset_reason(void)
+{
+	return (enum reset_reason)hri_rstc_read_RCAUSE_reg(RSTC);
+}
+
+/**
+ * \brief Set the sleep mode for the device
+ */
+int32_t _set_sleep_mode(const uint8_t mode)
+{
+	switch (mode) {
+	case 2: /* IDLE */
+	case 4: /* STANDBY */
+	case 5: /* BACKUP */
+	case 6: /* OFF */
+		hri_pm_write_SLEEPCFG_SLEEPMODE_bf(PM, mode);
+		break;
+	default:
+		return ERR_INVALID_ARG;
+	}
+
+	return ERR_NONE;
+}
+
+/**
+ * \brief Set performance level
+ */
+void _set_performance_level(const uint8_t level)
+{
+	if (hri_pm_get_PLCFG_PLSEL_bf(PM, PM_PLCFG_PLSEL_Msk) != level) {
+		hri_pm_clear_INTFLAG_reg(PM, 0xFF);
+		hri_pm_write_PLCFG_PLSEL_bf(PM, level);
+		while (!hri_pm_read_INTFLAG_reg(PM))
+			;
+	}
+}

Smol Watch Project/My Project/hpl/pm/hpl_pm_base.h

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+/**
+ * \file
+ *
+ * \brief SAM Power manager
+ *
+ * Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Subject to your compliance with these terms, you may use Microchip
+ * software and any derivatives exclusively with Microchip products.
+ * It is your responsibility to comply with third party license terms applicable
+ * to your use of third party software (including open source software) that
+ * may accompany Microchip software.
+ *
+ * THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES,
+ * WHETHER EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE,
+ * INCLUDING ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY,
+ * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE
+ * LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL
+ * LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE
+ * SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE
+ * POSSIBILITY OR THE DAMAGES ARE FORESEEABLE.  TO THE FULLEST EXTENT
+ * ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY
+ * RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
+ * THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
+ *
+ * \asf_license_stop
+ */
+
+#ifndef _HPL_PM_BASE_H_INCLUDED
+#define _HPL_PM_BASE_H_INCLUDED
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <utils_assert.h>
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* _HPL_PM_BASE_H_INCLUDED */