feat(lab03): refactor exrcice to make it in several files

src/02-driver/exercice/ex1-memory-oriented.c

@@ -0,0 +1,56 @@
+#include <fcntl.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/errno.h>
+#include <sys/mman.h>
+#include <unistd.h>
+
+int ex_memory_oriented(void) {
+
+    int fd = open("/dev/mem", O_RDWR);
+
+    if (fd < 0) {
+        printf("Failed to open /dev/mem: %s\n", strerror(errno));
+        return 1;
+    }
+
+    size_t page_size = getpagesize(); // return the number of byte in a page
+    off_t chip_id_addr = 0x01c14200; // physical address
+    off_t offset = chip_id_addr % page_size; // get the number of page until the chip is address
+    off_t start_page = chip_id_addr - offset; // align with pages
+
+    printf("page_size=0x%x offset=0x%x offset_page=0x%x\n", (unsigned int) page_size, (unsigned int) offset, (unsigned int) start_page);
+
+    // Get register virtual address from /dev/mem of the chip id
+    volatile uint32_t* regs = mmap(0, page_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, start_page);
+
+    if (regs == MAP_FAILED) {
+        printf("Failed to mmap: %s\n", strerror(errno));
+        return 1;
+    }
+
+
+
+    uint32_t chipid[4] = {[0] = 0,};
+
+    // Read values - Chip ID
+    chipid[0] = *(regs + (0x00 + offset) / sizeof(uint32_t));
+    chipid[1] = *(regs + (0x04 + offset) / sizeof(uint32_t));
+    chipid[2] = *(regs + (0x08 + offset) / sizeof(uint32_t));
+    chipid[3] = *(regs + (0x0c + offset) / sizeof(uint32_t));
+    printf(
+        "chipid=%08x'%08x'%08x'%08x\n",
+        chipid[0], chipid[1], chipid[2], chipid[3]
+    );
+
+    // Free space memory of the user¨
+    munmap((void*)regs, page_size);
+
+    // Close the file
+    close(fd);
+
+
+    return 0;
+}

src/02-driver/main.c

@@ -1,55 +1,27 @@
-#include <fcntl.h>
-#include <stdint.h>
 #include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/errno.h>
-#include <sys/mman.h>
-#include <unistd.h>
+
+#include "exercice/ex1-memory-oriented.c"
+#define MEMORY_ORIENTED
+
+#include "exercice/ex2-charachter-oriented.c"
+// #define CHARACTER_ORIENTED
+
 
 int main() {
+    int ret = 0;
 
-    int fd = open("/dev/mem", O_RDWR);
+#ifdef MEMORY_ORIENTED
+    printf("--------------------------------------\n");
+    printf("Exercice 1: Memory oriented exercice\n");
+    ret = ex_memory_oriented();
+#endif
 
-    if (fd < 0) {
-        printf("Failed to open /dev/mem: %s\n", strerror(errno));
-        return 1;
-    }
-
-    size_t page_size = getpagesize(); // return the number of byte in a page
-    off_t chip_id_addr = 0x01c14200; // physical address
-    off_t offset = chip_id_addr % page_size; // get the number of page until the chip is address
-    off_t start_page = chip_id_addr - offset; // align with pages
-
-    printf("page_size=0x%x offset=0x%x offset_page=0x%x\n", (unsigned int) page_size, (unsigned int) offset, (unsigned int) start_page);
-
-    // Get register virtual address from /dev/mem of the chip id
-    volatile uint32_t* regs = mmap(0, page_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, start_page);
-
-    if (regs == MAP_FAILED) {
-        printf("Failed to mmap: %s\n", strerror(errno));
-        return 1;
-    }
+#ifdef CHARACTER_ORIENTED
+    printf("--------------------------------------\n");
+    printf("Exercice 2: Character oriented exercice\n");
+    ret = ex_character_oriented();
+#endif
 
 
-
-    uint32_t chipid[4] = {[0] = 0,};
-
-    // Read values - Chip ID
-    chipid[0] = *(regs + (0x00 + offset) / sizeof(uint32_t));
-    chipid[1] = *(regs + (0x04 + offset) / sizeof(uint32_t));
-    chipid[2] = *(regs + (0x08 + offset) / sizeof(uint32_t));
-    chipid[3] = *(regs + (0x0c + offset) / sizeof(uint32_t));
-    printf(
-        "chipid=%08x'%08x'%08x'%08x\n",
-        chipid[0], chipid[1], chipid[2], chipid[3]
-    );
-
-    // Free space memory of the user¨
-    munmap((void*)regs, page_size);
-
-    // Close the file
-    close(fd);
-
-    return 0;
+    return ret;
 }