periph/flashpage: extend API

RIOT-OS · Oct 18, 2021 · 0babf55 · 0babf55
1 parent 8c4f0d6
commit 0babf55
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Showing 3 changed files with 43 additions and 8 deletions.
diff --git a/drivers/include/periph/flashpage.h b/drivers/include/periph/flashpage.h
@@ -211,6 +211,16 @@ unsigned flashpage_page(const void *addr);
  */
 void flashpage_erase(unsigned page);
 
+/**
+ * @brief Get number of first free flashpage
+ */
+unsigned flashpage_first_free(void);
+
+/**
+ * @brief Get number of last free flashpage
+ */
+unsigned flashpage_last_free(void);
+
 /**
  * @brief   Write the given page with the given data
  *

diff --git a/drivers/periph_common/flashpage.c b/drivers/periph_common/flashpage.c
@@ -22,6 +22,16 @@
 #include "cpu.h"
 #include "assert.h"
 
+#define ENABLE_DEBUG    (0)
+#include "debug.h"
+
+/**
+ * @brief   Memory markers, defined in the linker script
+ * @{
+ */
+extern uint32_t _end_fw;
+extern uint32_t _erom;
+
 /* guard this file, must be done before including periph/flashpage.h
  * TODO: remove as soon as periph drivers can be build selectively */
 #if defined(FLASHPAGE_SIZE) || defined(PERIPH_FLASHPAGE_CUSTOM_PAGESIZES)
@@ -129,3 +139,15 @@ unsigned flashpage_page(const void *addr)
     return page - 1;
 }
 #endif /* PERIPH_FLASHPAGE_NEEDS_FLASHPAGE_PAGE */
+
+#ifdef MODULE_PERIPH_FLASHPAGE
+unsigned flashpage_first_free(void)
+{
+    return flashpage_page(&_end_fw) + 1;
+}
+
+unsigned flashpage_last_free(void)
+{
+    return flashpage_page(&_erom) - 1;
+}
+#endif /* MODULE_PERIPH_FLASHPAGE */
diff --git a/tests/periph_flashpage/main.c b/tests/periph_flashpage/main.c
@@ -115,24 +115,27 @@ static int cmd_info(int argc, char **argv)
     (void)argc;
     (void)argv;
 
-    printf("Flash start addr:\t0x%08x\n", (int)CPU_FLASH_BASE);
+    printf("Flash start addr:\t\t0x%08x\n", (int)CPU_FLASH_BASE);
 #ifdef FLASHPAGE_SIZE
-    printf("Page size:\t\t%i\n", (int)FLASHPAGE_SIZE);
+    printf("Page size:\t\t\t%i\n", (int)FLASHPAGE_SIZE);
 #else
-    puts("Page size:\t\tvariable");
+    puts("Page size:\t\t\tvariable");
 #endif
-    printf("Number of pages:\t%i\n", (int)FLASHPAGE_NUMOF);
+    printf("Number of pages:\t\t%i\n", (int)FLASHPAGE_NUMOF);
 
 #ifdef FLASHPAGE_RWWEE_NUMOF
-    printf("RWWEE Flash start addr:\t0x%08x\n", (int)CPU_FLASH_RWWEE_BASE);
-    printf("RWWEE Number of pages:\t%i\n", (int)FLASHPAGE_RWWEE_NUMOF);
+    printf("RWWEE Flash start addr:\t\t0x%08x\n", (int)CPU_FLASH_RWWEE_BASE);
+    printf("RWWEE Number of pages:\t\t%i\n", (int)FLASHPAGE_RWWEE_NUMOF);
 #endif
 
 #ifdef NVMCTRL_USER
-    printf("AUX page size:\t%i\n", FLASH_USER_PAGE_AUX_SIZE + sizeof(nvm_user_page_t));
-    printf("    user area:\t%i\n", FLASH_USER_PAGE_AUX_SIZE);
+    printf("AUX page size:\t\t%i\n", FLASH_USER_PAGE_AUX_SIZE + sizeof(nvm_user_page_t));
+    printf("    user area:\t\t%i\n", FLASH_USER_PAGE_AUX_SIZE);
 #endif
 
+    printf("Number of first free page: \t%u \n", flashpage_first_free());
+    printf("Number of last free page: \t%u \n", flashpage_last_free());
+
     return 0;
 }