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-rw-r--r--examples/test-bkp.cpp80
1 files changed, 80 insertions, 0 deletions
diff --git a/examples/test-bkp.cpp b/examples/test-bkp.cpp
new file mode 100644
index 0000000..f5957b7
--- /dev/null
+++ b/examples/test-bkp.cpp
@@ -0,0 +1,80 @@
+#include <stdio.h> // for snprintf()
+
+#include "wirish.h"
+#include "bkp.h"
+#include "iwdg.h"
+
+void print_bkp_contents();
+void write_to_bkp(uint16 val);
+
+#define comm Serial2
+
+void setup() {
+ pinMode(BOARD_BUTTON_PIN, INPUT);
+
+ comm.begin(9600);
+ comm.println("*** Beginning BKP test");
+
+ comm.println("Init...");
+ bkp_init();
+ comm.println("Done.");
+
+ print_bkp_contents();
+ write_to_bkp(10);
+ print_bkp_contents();
+
+ comm.println("Enabling backup writes.");
+ bkp_enable_writes();
+ write_to_bkp(20);
+ print_bkp_contents();
+
+ comm.println("Disabling backup writes.");
+ bkp_disable_writes();
+ write_to_bkp(30);
+ print_bkp_contents();
+
+ comm.println("Done testing backup registers; press button to enable "
+ "independent watchdog (in order to cause a reset).");
+ waitForButtonPress(0);
+ iwdg_init(IWDG_PRE_4, 1);
+ comm.println();
+}
+
+void loop() {
+}
+
+void print_bkp_contents() {
+ comm.println("Backup data register contents:");
+ char buf[100];
+ for (int i = 1; i <= BKP_NR_DATA_REGS; i++) {
+ snprintf(buf, sizeof buf, "DR%d: %d ", i, bkp_read(i));
+ comm.print(buf);
+ if (i % 5 == 0) comm.println();
+ }
+ comm.println();
+}
+
+void write_to_bkp(uint16 val) {
+ comm.print("Attempting to write ");
+ comm.print(val);
+ comm.println(" to backup registers...");
+ for (int i = 1; i <= BKP_NR_DATA_REGS; i++) {
+ bkp_write(i, val);
+ }
+ comm.println("Done.");
+}
+
+__attribute__((constructor)) void premain() {
+ init();
+}
+
+int main(void) {
+ init();
+ setup();
+
+ while (1) {
+ loop();
+ }
+ return 0;
+}
+