Diff: main.cpp

Revision:

0:54f4cc3dfc0e

Child:

1:a78f957bd042

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Nov 26 03:14:24 2012 +0000
@@ -0,0 +1,109 @@
+/*
+ * SPI FLASH AT45DB081D (Atmel)
+ *   8Mbit
+ */
+#include "mbed.h"
+#include "at45db161d.h"
+
+#undef PAGE_SIZE
+#define PAGE_SIZE 264 // AT45DB081D (1MB)
+//#define PAGE_SIZE 528 // AT45DB321D (4MB)
+#define PAGE_NUM 4095 // AT45DB081D (1MB)
+//#define PAGE_NUM 8192 // AT45DB321D (4MB)
+
+#define WRITE_BUFFER 1
+#define READ_BUFFER 2
+
+DigitalOut myled(LED1);
+Serial pc(USBTX, USBRX);
+
+SPI spi(p11, p12, p13); // mosi, miso, sclk
+ATD45DB161D memory(spi, p19);
+
+void flash_write (int addr, char *buf, int len) {
+    int i;
+    memory.BufferWrite(WRITE_BUFFER, addr % PAGE_SIZE);
+    for (i = 0; i < len; i ++) {
+        spi.write(buf[i]);
+    }
+    memory.BufferToPage(WRITE_BUFFER, addr / PAGE_SIZE, 1);
+}
+
+void flash_read (int addr, char *buf, int len) {
+    int i;
+    memory.PageToBuffer(addr / PAGE_SIZE, READ_BUFFER);
+    memory.BufferRead(READ_BUFFER, addr % PAGE_SIZE, 1);
+    for (i = 0; i < len; i ++) {
+        buf[i] = spi.write(0xff);
+    }
+}
+
+int main() {
+    int i;
+    char buf[PAGE_SIZE];
+    Timer t;
+    ATD45DB161D::ID id;
+
+    pc.baud(115200);
+    spi.frequency(16000000);
+    wait_ms(500);
+    
+    memory.ReadManufacturerAndDeviceID(&id);
+    printf("RAM Manufacturer ID : %02x\r\n", id.manufacturer);
+    printf("RAM Device ID : %02x %02x\r\n", id.device[0], id.device[1]);
+    wait_ms(10);
+
+    printf("\r\nHELLO test\r\n");
+    
+    printf("RAM write\r\n");
+    strcpy(buf, "Hello!");
+    flash_write(0, buf, 6);
+    
+    for (i = 0; i < PAGE_SIZE; i ++) {
+        buf[i] = i;
+    }
+    flash_write(6, buf, PAGE_SIZE - 6);
+
+    wait(1);
+    memset(buf, 0, PAGE_SIZE);
+    
+    printf("RAM read\r\n");
+    flash_read(0, buf, PAGE_SIZE);
+    for (i = 0; i < PAGE_SIZE; i ++) {
+        printf(" %02x", buf[i]);
+        if ((i & 0x0f) == 0x0f)
+            printf("\r\n");
+    }
+
+    wait(1);
+
+    printf("\r\nWrite/Read time\r\n");
+
+    printf("RAM write\r\n");
+    t.reset();
+    t.start();
+    for (i = 0; i < 0x20000; i += PAGE_SIZE) {
+        buf[0] = (i >> 8) & 0xff;
+        flash_write(i, buf, PAGE_SIZE);
+        if ((i & 0x0fff) == 0) printf(".");
+    }
+    t.stop();
+    printf("\r\ntime %f, %f KBytes/sec\r\n", t.read(), (float)0x20000 / 1024 / t.read());
+
+    wait(1);
+
+    printf("RAM read\r\n");
+    t.reset();
+    t.start();
+    for (i = 0; i < 0x20000; i += PAGE_SIZE) {
+        flash_read(i, buf, PAGE_SIZE);
+        if (buf[0] != ((i >> 8) & 0xff)) {
+            printf("error %d\r\n", i);
+            break;
+        }
+        if ((i & 0x0fff) == 0) printf(".");
+    }
+    t.stop();
+    printf("\r\ntime %f, %f KBytes/sec\r\n", t.read(), 0x20000 / 1024 / t.read());
+
+}