Daiki Kato / Mbed OS SoftwareStanby_test_use_OS

This is a sample to make Software Standby using OS.

main.cpp@5:70870890e359, 2019-10-08 (annotated)

Committer:
dkato
Date:
Tue Oct 08 07:53:20 2019 +0000
Revision:
5:70870890e359
Parent:
4:272e885e36a9 
Changed interrupt disable function

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dkato 0:27ae610e630e 1 #include "mbed.h"
dkato 0:27ae610e630e 2
dkato 0:27ae610e630e 3 InterruptIn button(USER_BUTTON0);
dkato 0:27ae610e630e 4 DigitalOut led1(LED1);
dkato 0:27ae610e630e 5 Thread * pTestTask = NULL;
dkato 0:27ae610e630e 6
dkato 3:64e8fa1b8787 7 static void idle_hook(void) {
dkato 4:272e885e36a9 8 // Do the following instead of "__WFI()"
dkato 4:272e885e36a9 9 __SEV();
dkato 4:272e885e36a9 10 __WFE();
dkato 4:272e885e36a9 11 __WFE();
dkato 3:64e8fa1b8787 12 }
dkato 3:64e8fa1b8787 13
dkato 3:64e8fa1b8787 14 void SoftwareStandby(void) {
dkato 3:64e8fa1b8787 15 volatile uint32_t dummy_32;
dkato 3:64e8fa1b8787 16 volatile uint8_t dummy_8;
dkato 3:64e8fa1b8787 17
dkato 5:70870890e359 18 core_util_critical_section_enter();
dkato 3:64e8fa1b8787 19
dkato 3:64e8fa1b8787 20 // Set the standby_mode_en bit of the power control register in the PL310 to 1.
dkato 3:64e8fa1b8787 21 L2C.REG15_POWER_CTRL = 0x00000001uL;
dkato 3:64e8fa1b8787 22 dummy_32 = L2C.REG15_POWER_CTRL;
dkato 3:64e8fa1b8787 23
dkato 3:64e8fa1b8787 24 // Clear the TME bit in the watchdog timer control/status register (WTCSR) of the watchdog timer to 0 to stop the watchdog timer.
dkato 3:64e8fa1b8787 25 WDT.WTCSR = 0xA518;
dkato 3:64e8fa1b8787 26 WDT.WTCNT = 0x5A00;
dkato 3:64e8fa1b8787 27 WDT.WTCSR = 0xA51D; // CKS[2:0] = b'101 : 1/1024 x P0 (7.8ms)
dkato 3:64e8fa1b8787 28
dkato 3:64e8fa1b8787 29 CPG.STBCR1 = 0x80;
dkato 3:64e8fa1b8787 30 dummy_8 = CPG.STBCR1;
dkato 3:64e8fa1b8787 31
dkato 3:64e8fa1b8787 32 __WFI();
dkato 3:64e8fa1b8787 33
dkato 5:70870890e359 34 core_util_critical_section_exit();
dkato 3:64e8fa1b8787 35 }
dkato 3:64e8fa1b8787 36
dkato 0:27ae610e630e 37 static void interrupt_button(void) {
dkato 0:27ae610e630e 38 #if(0) // It may or may not be present.
dkato 0:27ae610e630e 39 if (pTestTask != NULL) {
dkato 0:27ae610e630e 40 pTestTask->signal_set(1);
dkato 0:27ae610e630e 41 }
dkato 0:27ae610e630e 42 #endif
dkato 0:27ae610e630e 43 }
dkato 0:27ae610e630e 44
dkato 0:27ae610e630e 45 void test_task(void) {
dkato 0:27ae610e630e 46 int test_cnt = 0;
dkato 0:27ae610e630e 47
dkato 0:27ae610e630e 48 button.fall(&interrupt_button);
dkato 0:27ae610e630e 49 button.rise(&interrupt_button);
dkato 0:27ae610e630e 50
dkato 0:27ae610e630e 51 while (true) {
dkato 3:64e8fa1b8787 52 SoftwareStandby();
dkato 0:27ae610e630e 53 #if(0) // It may or may not be present.
dkato 0:27ae610e630e 54 // It becomes sleep during idle task.
dkato 0:27ae610e630e 55 Thread::signal_wait(1);
dkato 0:27ae610e630e 56 #endif
dkato 0:27ae610e630e 57 led1 = !led1;
dkato 2:c0f92fd0e8e9 58 printf("%d\r\n", test_cnt++);
dkato 2:c0f92fd0e8e9 59 ThisThread::sleep_for(5); // Wait for output completion of printf().
dkato 0:27ae610e630e 60 }
dkato 0:27ae610e630e 61 }
dkato 0:27ae610e630e 62
dkato 0:27ae610e630e 63 int main() {
dkato 4:272e885e36a9 64 Thread::attach_idle_hook(idle_hook);
dkato 0:27ae610e630e 65 pTestTask = new Thread();
dkato 0:27ae610e630e 66 pTestTask->start(test_task);
dkato 0:27ae610e630e 67 }