nikos chalikias
/
n-bed_AT45DB161E
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SPIFLASH_AT45DB
by 
Suga koubou
Revision 0:54f4cc3dfc0e, committed 2012-11-26
- Comitter:
- okini3939
- Date:
- Mon Nov 26 03:14:24 2012 +0000
- Child:
- 1:a78f957bd042
- Commit message:
- 1st build
;
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/at45db161d.lib Mon Nov 26 03:14:24 2012 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/okini3939/code/at45db161d/#b379e16fdf6f
--- /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());
+
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Mon Nov 26 03:14:24 2012 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/3d775a932e1d \ No newline at end of file