From 3e97d4fe7e13aeebae0ada1d323023028c338e25 Mon Sep 17 00:00:00 2001
From: Steins7 <steinsset@gmail.com>
Date: Sun, 14 Jul 2024 19:17:20 +0200
Subject: [PATCH] Implement sleep modes

---
 drv/pwr.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 drv/pwr.h | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 102 insertions(+)
 create mode 100644 drv/pwr.c
 create mode 100644 drv/pwr.h

diff --git a/drv/pwr.c b/drv/pwr.c
new file mode 100644
index 0000000..223a660
--- /dev/null
+++ b/drv/pwr.c
@@ -0,0 +1,51 @@
+/** @file pwr.c
+ * Module handling the power management's control
+ *
+ * The module provides functions to enter the different sleep states, control
+ * and filter wakeup events (WKUP and RTC) and configure power voltage
+ * detection
+ */
+
+//--includes--------------------------------------------------------------------
+
+#include "pwr.h"
+#include "pwr_regs.h"
+#include "scb.h"
+
+
+//--local definitions-----------------------------------------------------------
+
+//--local variables-------------------------------------------------------------
+
+static volatile struct PWR* regs = (struct PWR*)PWR_BASE_ADDRESS;
+
+
+//--public functions------------------------------------------------------------
+
+void pwr_sleep(void)
+{
+	scb_configure_deepsleep(false);
+	__asm("wfi");
+}
+
+void pwr_stop(enum PwrWakeupSpeed speed)
+{
+	scb_configure_deepsleep(true);
+	regs->CR.PDDS = 0;
+	regs->CR.LPDS = speed;
+	__asm("wfi");
+}
+
+void pwr_standby(void)
+{
+	scb_configure_deepsleep(true);
+	regs->CR.PDDS = 1;
+	__asm("wfi");
+}
+
+
+//--local functions-------------------------------------------------------------
+
+//--ISRs------------------------------------------------------------------------
+
+
diff --git a/drv/pwr.h b/drv/pwr.h
new file mode 100644
index 0000000..f20ad9a
--- /dev/null
+++ b/drv/pwr.h
@@ -0,0 +1,51 @@
+/** @file pwr.h
+ * Module handling the power management's control
+ *
+ * The module provides functions to enter the different sleep states, control
+ * and filter wakeup events (WKUP and RTC) and configure power voltage
+ * detection
+ */
+
+#ifndef _PWR_H_
+#define _PWR_H_
+
+//--includes--------------------------------------------------------------------
+
+//--type definitions------------------------------------------------------------
+
+enum PwrWakeupSpeed {
+	PWR_WAKEUP_SPEED_FAST, //faster wakeup, higher consumption in stop mode
+	PWR_WAKEUP_SPEED_SLOW, //slower wakeup, lower consumption in stop mode
+};
+
+enum PwrPvdThreshold {
+	PWR_PVD_THRESHOLD_2_2V,
+	PWR_PVD_THRESHOLD_2_3V,
+	PWR_PVD_THRESHOLD_2_4V,
+	PWR_PVD_THRESHOLD_2_5V,
+	PWR_PVD_THRESHOLD_2_6V,
+	PWR_PVD_THRESHOLD_2_7V,
+	PWR_PVD_THRESHOLD_2_8V,
+	PWR_PVD_THRESHOLD_2_9V,
+
+};
+
+typedef void (*PwrPvdCallback)(void);
+
+
+//--functions-------------------------------------------------------------------
+
+void pwr_sleep(void);
+void pwr_stop(enum PwrWakeupSpeed speed);
+void pwr_standby(void);
+
+bool pwr_wakeup_event(void);
+bool pwr_standby_exit(void);
+
+void pwr_configure_bkp_write(bool enable);
+void pwr_configure_wakeup_pin(bool enable);
+void pwr_configure_pvd(enum PwrPvdThreshold treshold);
+
+
+#endif //_PWR_H_
+