1 files changed, 75 insertions, 0 deletions
diff --git a/testhal/STM32F4xx/BKPSRAM/main.c b/testhal/STM32F4xx/BKPSRAM/main.c
new file mode 100644
index 000000000..801d7e444
--- /dev/null
+++ b/testhal/STM32F4xx/BKPSRAM/main.c
@@ -0,0 +1,75 @@
+/*
+    ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+#include "ch.h"
+#include "hal.h"
+
+uint32_t *bkpsram = (uint32_t *)BKPSRAM_BASE;
+
+/*
+ *
+ */
+static void write_watermark(void){
+  size_t i = 0;
+  for (i=0; i<10; i++)
+    bkpsram[i] = i;
+
+  /* signalize about sram erase */
+  palClearPad(GPIOB, GPIOB_LED_R);
+}
+
+/*
+ *
+ */
+static bool check_watermark(void){
+  size_t i = 0;
+  for (i=0; i<10; i++){
+    if (bkpsram[i] != i)
+      return false;
+  }
+  return true;
+}
+
+/**
+ * Main function.
+ */
+int main(void){
+
+  /*
+   * System initializations.
+   * - HAL initialization, this also initializes the configured device drivers
+   *   and performs the board-specific initializations.
+   * - Kernel initialization, the main() function becomes a thread and the
+   *   RTOS is active.
+   */
+  halInit();
+  chSysInit();
+
+  /* Goal of this testhal */
+  if (!check_watermark()){
+    write_watermark();
+  }
+
+  /* Normal main thread loop. */
+  while (TRUE){
+    chThdSleepMilliseconds(200);
+    palTogglePad(GPIOB, GPIOB_LED_B);
+  }
+
+  return 0;
+}
+
+