diff --git a/application.c b/application.c
index a4b06a2..c7bb9d6 100644
--- a/application.c
+++ b/application.c
@@ -328,6 +328,32 @@ void main(void)
 	usb_cdcacm_setup(); // setup USB CDC ACM (for printing)
 	printf("\nwelcome to the CuVoodoo STM32F1 example application\n"); // print welcome message
 
+#if DEBUG
+	// show reset cause
+	if (RCC_CSR & (RCC_CSR_LPWRRSTF | RCC_CSR_WWDGRSTF | RCC_CSR_IWDGRSTF | RCC_CSR_SFTRSTF | RCC_CSR_PORRSTF | RCC_CSR_PINRSTF)) {
+		puts("reset cause(s):");
+		if (RCC_CSR & RCC_CSR_LPWRRSTF) {
+			puts(" low-power");
+		}
+		if (RCC_CSR & RCC_CSR_WWDGRSTF) {
+			puts(" window-watchdog");
+		}
+		if (RCC_CSR & RCC_CSR_IWDGRSTF) {
+			puts(" independent-watchdog");
+		}
+		if (RCC_CSR & RCC_CSR_SFTRSTF) {
+			puts(" software");
+		}
+		if (RCC_CSR & RCC_CSR_PORRSTF) {
+			puts(" POR/PDR");
+		}
+		if (RCC_CSR & RCC_CSR_PINRSTF) {
+			puts(" pin");
+		}
+		putc('\n');
+		RCC_CSR |= RCC_CSR_RMVF; // clear reset flags
+	}
+#endif
 #if !(DEBUG)
 	// show watchdog information
 	printf("setup watchdog: %.2fs", WATCHDOG_PERIOD / 1000.0);