Remove board_deep_sleep_hook, which should be done in board_deinit.

ports/atmel-samd/boards/seeeduino_wio_terminal/board.c

@@ -32,7 +32,6 @@
 #include "shared-module/displayio/__init__.h"
 #include "shared-module/displayio/mipi_constants.h"
 #include "shared-bindings/digitalio/DigitalInOut.h"
-#include "common-hal/alarm/__init__.h"
 
 displayio_fourwire_obj_t board_display_obj;
 digitalio_digitalinout_obj_t CTR_5V;
@@ -52,7 +51,7 @@ uint8_t display_init_sequence[] = {
     0xc1, 0x01, 0x10, // Power control SAP[2:0];BT[3:0]
     0xc5, 0x02, 0x3e, 0x28, // VCM control
     0xc7, 0x01, 0x86, // VCM control2
-    0x36, 0x01, 0x38, // Memory Access Control
+    0x36, 0x01, 0xe8, // Memory Access Control
     0x37, 0x01, 0x00, // Vertical scroll zero
     0x3a, 0x01, 0x55, // COLMOD: Pixel Format Set
     0xb1, 0x02, 0x00, 0x18, // Frame Rate Control (In Normal Mode/Full Colors)
@@ -89,7 +88,7 @@ void board_init(void) {
         240, // Height
         0, // column start
         0, // row start
-        180, // rotation
+        0, // rotation
         16, // Color depth
         false, // Grayscale
         false, // pixels in a byte share a row. Only valid for depths < 8
@@ -130,6 +129,8 @@ void board_init(void) {
     common_hal_digitalio_digitalinout_never_reset(&CTR_3V3);
     common_hal_digitalio_digitalinout_never_reset(&USB_HOST_ENABLE);
 
+    // reset pin after fake deep sleep
+    reset_pin_number(pin_PA18.number);
 }
 
 bool board_requests_safe_mode(void) {
@@ -144,10 +145,8 @@ void board_deinit(void) {
     common_hal_digitalio_digitalinout_deinit(&CTR_5V);
     common_hal_digitalio_digitalinout_deinit(&CTR_3V3);
     common_hal_digitalio_digitalinout_deinit(&USB_HOST_ENABLE);
-}
 
-void board_deep_sleep_hook(void) {
+    // Turn off RTL8720DN before the deep sleep.
-    // Pins are reset before entering deep sleep in cleanup_after_vm()
+    // Pin state is kept during BACKUP sleep.
-    // This hook turn RTL_PWR off
     gpio_set_pin_direction(pin_PA18.number, GPIO_DIRECTION_OUT);
 }

ports/atmel-samd/common-hal/alarm/__init__.c

@@ -101,12 +101,10 @@ mp_obj_t common_hal_alarm_light_sleep_until_alarms(size_t n_alarms, const mp_obj
     PM->SLEEPCFG.reg = PM_SLEEPCFG_SLEEPMODE_STANDBY;
     while (PM->SLEEPCFG.bit.SLEEPMODE != PM_SLEEPCFG_SLEEPMODE_STANDBY_Val) {
     }
-    // Even though RAMCFG_OFF, SYSRAM seems to be retained.  Probably
+    // STDBYCFG is left to be 0 to retain SYSRAM.  Note that, even if
-    // because RTC keeps sleepwalking.  Anyway, STDBYCFG should be
+    // RAMCFG_OFF is set here, SYSRAM seems to be retained, probably
-    // left intact as 0 to retain SYSRAM.
+    // because RTC and/or USB keeps sleepwalking.
-    #if 0
+
-    PM->STDBYCFG.reg = PM_STDBYCFG_RAMCFG_OFF;
-    #endif
     while (!mp_hal_is_interrupted()) {
         RUN_BACKGROUND_TASKS;
         // Detect if interrupt was alarm or ctrl-C interrupt.
@@ -153,11 +151,6 @@ void NORETURN common_hal_alarm_enter_deep_sleep(void) {
     alarm_time_timealarm_prepare_for_deep_sleep();
     // port_disable_tick(); // TODO: Required for SAMD?
 
-    // Set pin state before the deep sleep, to turn off devices and reduce power.
-    // In case of Wio Terminal, set PA18 to 0 to turn off RTL8720DN.
-    // Pin state is kept during BACKUP sleep.
-    board_deep_sleep_hook();
-
     // cache alarm flag and etc since RTC about to be reset
     uint32_t _flag = SAMD_ALARM_FLAG;           // RTC->MODE0.BKUP[0].reg
     uint32_t _target = RTC->MODE0.COMP[1].reg;
@@ -193,13 +186,7 @@ void NORETURN common_hal_alarm_enter_deep_sleep(void) {
     // Enable interrupts
     common_hal_mcu_enable_interrupts();
 
-    // Set-up Deep Sleep Mode & RAM retention
+    // Set-up Deep Sleep Mode with backup RAM retention
-    // Left BRAMCFG untouched as 0
-    #if 0
-    PM->BKUPCFG.reg = PM_BKUPCFG_BRAMCFG(0x2);       // No RAM retention 0x2 partial:0x1
-    while (PM->BKUPCFG.bit.BRAMCFG != 0x2) {         // Wait for synchronization
-    }
-    #endif
     PM->SLEEPCFG.reg = PM_SLEEPCFG_SLEEPMODE_BACKUP;
     while (PM->SLEEPCFG.bit.SLEEPMODE != PM_SLEEPCFG_SLEEPMODE_BACKUP_Val) {
     }
@@ -216,24 +203,10 @@ void NORETURN common_hal_alarm_enter_deep_sleep(void) {
     }
 }
 
-// In case of fake deep sleep, event loop is mostly managed in main.c.
+// Default common_hal_alarm_pretending_deep_sleep is defined in
-// Default common_hal_alarm_pretending_deep_sleep is defined in shared-bindings.
+// shared-bindings, which is used here.  Note that "pretending" does
-// Note that "pretending" does not work on REPL; it only works for main.py (or code.py, ...).
+// not work on REPL; it only works for main.py (or code.py, ...).
-//
-// In case of fake sleep, if pin state is modified in the hook, the pin is left dirty...
-#if 0
-void common_hal_alarm_pretending_deep_sleep(void) {
-    // RTC is already be furnished by common_hal_alarm_set_deep_sleep_alarms.
-    // fake_sleep = true;
-
-    board_deep_sleep_hook();
-    port_idle_until_interrupt();
-}
-#endif
 
 void common_hal_alarm_gc_collect(void) {
     gc_collect_ptr(shared_alarm_get_wake_alarm());
 }
-
-MP_WEAK void board_deep_sleep_hook(void) {
-}

ports/atmel-samd/common-hal/alarm/__init__.h

@@ -57,5 +57,4 @@ extern void alarm_set_wakeup_reason(samd_sleep_source_t reason);
 void alarm_get_wakeup_cause(void);
 extern void alarm_reset(void);
 
-extern void board_deep_sleep_hook(void);
 #endif // MICROPY_INCLUDED_ATMEL_SAMD_COMMON_HAL_ALARM__INIT__H

ports/atmel-samd/common-hal/alarm/pin/PinAlarm.c

@@ -171,13 +171,14 @@ void alarm_pin_pinalarm_reset(void) {
 static void pinalarm_set_alarms_light(size_t n_alarms, const mp_obj_t *alarms) {
     int err = PINALARM_NOERR;
     size_t i;
+    const mcu_pin_obj_t *pin;
 
     for (i = 0; i < n_alarms; i++) {
         if (!mp_obj_is_type(alarms[i], &alarm_pin_pinalarm_type)) {
             continue;
         }
         alarm_pin_pinalarm_obj_t *alarm = MP_OBJ_TO_PTR(alarms[i]);
-        const mcu_pin_obj_t *pin = alarm->pin;
+        pin = alarm->pin;
 
         if (!pin_number_is_free(pin->number)) {
             err = PINALARM_ERR_NOT_FREE;
@@ -229,14 +230,15 @@ static void pinalarm_set_alarms_light(size_t n_alarms, const mp_obj_t *alarms) {
 
     switch (err) {
         case PINALARM_ERR_NOT_FREE:
-            mp_raise_RuntimeError(translate("Pin is not free"));
+            assert_pin_free(pin);
-            ;
+            // raise ValueError here
+            MP_FALLTHROUGH
         case PINALARM_ERR_NOEXTINT:
             mp_raise_RuntimeError(translate("No hardware support on pin"));
         case PINALARM_ERR_NOCHANNEL:
             mp_raise_RuntimeError(translate("A hardware interrupt channel is already in use"));
         default:
-            mp_raise_RuntimeError(translate("Unknown error"));
+            mp_raise_RuntimeError(translate("Unknown reason."));
     }
 }