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--- stm32:peripherals:pwr_sleep [2016/10/13 11:59] – feur
+++ stm32:peripherals:pwr_sleep [2019/09/16 07:19] (current) – [Programming Example] kjaz
@@ Line 21: / Line 21: @@
 #include "reg_stm32f4xx.h"
-RCC->AHBENR[0] |= (0x1 <<  0u);       /* Enable GPIOA clock */
+RCC->AHB1ENR |= (0x1 <<  0u);       /* Enable GPIOA clock */
-RCC->APBENR[1] |= (0x1 << 14u);       /* Enable SYSCFG clock */
+RCC->APB2ENR |= (0x1 << 14u);       /* Enable SYSCFG clock */
 /* Configure wake up pin (PA.0). */
@@ Line 31: / Line 31: @@
 /* Configure interrupt. */
-SYSCFG->EXTICR[0] |= (0u << 0u);      /* Set EXTI0 to GPIOA. */
+SYSCFG->EXTICR1 |= (0u << 0u);      /* Set EXTI0 to GPIOA. */
 EXTI->RTSR |= (0x1 << 0u);            /* Trigger on rising edge. */
 EXTI->IMR |= (0x1 << 0u);             /* Unmask interrupt line. */
-NVIC->ISER[0] |= (0x1 << 6u);         /* Enable EXTI0 interrupt. */
+NVIC->ISER0 |= (0x1 << 6u);         /* Enable EXTI0 interrupt. */
 /* Disable SLEEPDEEP (STOP or STANDBY mode). */
 SCB->SCR &= ~(0x1 << 2u);
-/* Enter sleep mode */
+/* -------------------- Enter SLEEP mode -------------------- */
 __asm volatile ("wfi");
+/* -------------------- Exit SLEEP mode --------------------- */
+/* Since all registers and the SRAM are untouched by the SLEEP mode,
+ * the program continues after the WFI instruction.
+ * No further steps required.
+ */
 </code>
 \\