Added espFsInit call

espfs/espfs.c

@@ -35,7 +35,6 @@ It's written for use with httpd, but doesn't need to be used as such.
 #define os_strcpy strcpy
 #define os_printf printf
 #define ICACHE_FLASH_ATTR
-extern char* espFsData;
 #endif
 
 #include "espfsformat.h"
@@ -46,7 +45,7 @@ extern char* espFsData;
 #include "heatshrink_decoder.h"
 #endif
 
-
+static char* espFsData = NULL;
 
 
 struct EspFsFile {
@@ -74,6 +73,22 @@ Accessing the flash through the mem emulation at 0x40200000 is a bit hairy: All
 a memory exception, crashing the program.
 */
 
+EspFsInitResult espFsInit(void *flashAddress) {
+	// base address must be aligned to 4 bytes
+	if (((int)flashAddress & 3) != 0) {
+		return ESPFS_INIT_RESULT_BAD_ALIGN;
+	}
+
+	// check if there is valid header at address
+	EspFsHeader testHeader;
+	os_memcpy(&testHeader, flashAddress, sizeof(EspFsHeader));
+	if (testHeader.magic != ESPFS_MAGIC) {
+		return ESPFS_INIT_RESULT_NO_IMAGE;
+	}
+
+	espFsData = (char *)flashAddress;
+	return ESPFS_INIT_RESULT_OK;
+}
 
 //Copies len bytes over from dst to src, but does it using *only*
 //aligned 32-bit reads. Yes, it's no too optimized but it's short and sweet and it works.
@@ -100,11 +115,11 @@ void ICACHE_FLASH_ATTR memcpyAligned(char *dst, char *src, int len) {
 
 //Open a file and return a pointer to the file desc struct.
 EspFsFile ICACHE_FLASH_ATTR *espFsOpen(char *fileName) {
-#ifdef __ets__
-	char *p=(char *)(ESPFS_POS+0x40200000);
-#else
+	if (espFsData == NULL) {
+		os_printf("Call espFsInit first!\n");
+		return NULL;
+	}
 	char *p=espFsData;
-#endif
 	char *hpos;
 	char namebuf[256];
 	EspFsHeader h;
@@ -116,7 +131,7 @@ EspFsFile ICACHE_FLASH_ATTR *espFsOpen(char *fileName) {
 		hpos=p;
 		//Grab the next file header.
 		os_memcpy(&h, p, sizeof(EspFsHeader));
-		if (h.magic!=0x73665345) {
+		if (h.magic!=ESPFS_MAGIC) {
 			os_printf("Magic mismatch. EspFS image broken.\n");
 			return NULL;
 		}

espfs/espfs.h

@@ -4,13 +4,15 @@
 //Define this if you want to be able to use Heatshrink-compressed espfs images.
 #define ESPFS_HEATSHRINK
 
-//Pos of esp fs in flash
-#define ESPFS_POS  0x12000
-#define ESPFS_SIZE 0x2E000
-
+typedef enum {
+	ESPFS_INIT_RESULT_OK,
+	ESPFS_INIT_RESULT_NO_IMAGE,
+	ESPFS_INIT_RESULT_BAD_ALIGN,
+} EspFsInitResult;
 
 typedef struct EspFsFile EspFsFile;
 
+EspFsInitResult espFsInit(void *flashAddress);
 EspFsFile *espFsOpen(char *fileName);
 int espFsRead(EspFsFile *fh, char *buff, int len);
 void espFsClose(EspFsFile *fh);

espfs/espfsformat.h

@@ -18,6 +18,7 @@ with the FLAG_LASTFILE flag set.
 #define FLAG_LASTFILE (1<<0)
 #define COMPRESS_NONE 0
 #define COMPRESS_HEATSHRINK 1
+#define ESPFS_MAGIC 0x73665345
 
 typedef struct {
 	int32_t magic;

espfs/espfstest/main.c

@@ -22,6 +22,7 @@ int main(int argc, char **argv) {
 	char buff[128];
 	EspFsFile *ef;
 	off_t size;
+	EspFsInitResult ir;
 
 	if (argc!=3) {
 		printf("Usage: %s espfs-image file\nExpands file from the espfs-image archive.\n", argv[0]);
@@ -40,6 +41,12 @@ int main(int argc, char **argv) {
 		exit(1);
 	}
 
+	ir=espFsInit(espFsData);
+	if (ir != ESPFS_INIT_RESULT_OK) {
+		printf("Couldn't init espfs filesystem (code %d)\n", ir);
+		exit(1);
+	}
+
 	ef=espFsOpen(argv[2]);
 	if (ef==NULL) {
 		printf("Couldn't find %s in image.\n", argv[2]);

espfs/espfstest/style.css

@@ -0,0 +1,17 @@
+
+body {
+	background-color: #404040;
+	font-family: sans-serif;
+}
+
+#main {
+	background-color: #d0d0FF;
+	-moz-border-radius: 5px;
+	-webkit-border-radius: 5px;
+	border-radius: 5px;
+	border: 2px solid #000000;
+	width: 800px;
+	margin: 0 auto;
+	padding: 20px
+}
+

user/user_main.c

@@ -19,6 +19,7 @@
 #include "cgiflash.h"
 #include "stdout.h"
 #include "auth.h"
+#include "espfs.h"
 
 //Function that tells the authentication system what users/passwords live on the system.
 //This is disabled in the default build; if you want to try it, enable the authBasic line in
@@ -73,10 +74,14 @@ HttpdBuiltInUrl builtInUrls[]={
 };
 
 
-//Main routine. Initialize stdout, the I/O and the webserver and we're done.
+//Main routine. Initialize stdout, the I/O, filesystem and the webserver and we're done.
 void user_init(void) {
 	stdoutInit();
 	ioInit();
+
+	// 0x40200000 is the base address for spi flash memory mapping, 0x12000 is the position
+	// where image is written in flash
+	espFsInit((void*)(0x40200000 + 0x12000));
 	httpdInit(builtInUrls, 80);
 	os_printf("\nReady\n");
 }