main.cpp

00001 // N.C. n-bed test AT45DB161E
00002 // PAGE_SIZE 512, PAGE_NUM 8192
00003 
00004 
00005 
00006 /*
00007  * SPI FLASH AT45DB081D (Atmel)
00008  *   8Mbit
00009  */
00010 #include "mbed.h"
00011 #include "at45db161d.h"
00012 
00013 #undef PAGE_SIZE
00014 //#define PAGE_SIZE 264 // AT45DB081D (1MB)
00015 #define PAGE_SIZE 512 // AT45DB081D (1MB) N.C.
00016 //#define PAGE_SIZE 528 // AT45DB321D (4MB)
00017 #define PAGE_NUM 4095 // AT45DB081D (1MB)
00018 //#define PAGE_NUM 8192 // AT45DB321D (4MB)
00019 
00020 #define WRITE_BUFFER 1
00021 #define READ_BUFFER 2
00022 
00023 DigitalOut myled(LED1);
00024 Serial pc(USBTX, USBRX);
00025 
00026 SPI spi(p11, p12, p13); // mosi, miso, sclk
00027 ATD45DB161D memory(spi, p14);
00028 
00029 void flash_write (int addr, char *buf, int len) {
00030     int i;
00031     memory.BufferWrite(WRITE_BUFFER, addr % PAGE_SIZE);
00032     for (i = 0; i < len; i ++) {
00033         spi.write(buf[i]);
00034     }
00035     memory.BufferToPage(WRITE_BUFFER, addr / PAGE_SIZE, 1);
00036 }
00037 
00038 void flash_read (int addr, char *buf, int len) {
00039     int i;
00040     memory.PageToBuffer(addr / PAGE_SIZE, READ_BUFFER);
00041     memory.BufferRead(READ_BUFFER, addr % PAGE_SIZE, 1);
00042     for (i = 0; i < len; i ++) {
00043         buf[i] = spi.write(0xff);
00044     }
00045 }
00046 
00047 int main() {
00048     int i;
00049     char buf[PAGE_SIZE];
00050     Timer t;
00051     ATD45DB161D::ID id;
00052 
00053     //pc.baud(115200);
00054     spi.frequency(16000000);
00055     wait_ms(500);
00056     
00057     memory.ReadManufacturerAndDeviceID(&id);
00058     printf("RAM Manufacturer ID : %02x\r\n", id.manufacturer);
00059     printf("RAM Device ID : %02x %02x\r\n", id.device[0], id.device[1]);
00060     wait_ms(10);
00061 
00062     printf("\r\nHELLO test\r\n");
00063     
00064     printf("RAM write\r\n");
00065     strcpy(buf, "Hello!");
00066     flash_write(0, buf, 6);
00067     
00068     for (i = 0; i < PAGE_SIZE; i ++) {
00069         buf[i] = i;
00070     }
00071     flash_write(6, buf, PAGE_SIZE - 6);
00072 
00073     wait(1);
00074     memset(buf, 0, PAGE_SIZE);
00075     
00076     printf("RAM read\r\n");
00077     flash_read(0, buf, PAGE_SIZE);
00078     for (i = 0; i < PAGE_SIZE; i ++) {
00079         printf(" %02x", buf[i]);
00080         if ((i & 0x0f) == 0x0f)
00081             printf("\r\n");
00082     }
00083 
00084     wait(1);
00085 
00086     printf("\r\nWrite/Read time\r\n");
00087 
00088     printf("RAM write\r\n");
00089     t.reset();
00090     t.start();
00091     for (i = 0; i < 0x20000; i += PAGE_SIZE) {
00092         buf[0] = (i >> 8) & 0xff;
00093         flash_write(i, buf, PAGE_SIZE);
00094         if ((i & 0x0fff) == 0) printf(".");
00095     }
00096     t.stop();
00097     printf("\r\ntime %f, %f KBytes/sec\r\n", t.read(), (float)0x20000 / 1024 / t.read());
00098 
00099     wait(1);
00100 
00101     printf("RAM read\r\n");
00102     t.reset();
00103     t.start();
00104     for (i = 0; i < 0x20000; i += PAGE_SIZE) {
00105         flash_read(i, buf, PAGE_SIZE);
00106         if (buf[0] != ((i >> 8) & 0xff)) {
00107             printf("error %d\r\n", i);
00108             break;
00109         }
00110         if ((i & 0x0fff) == 0) printf(".");
00111     }
00112     t.stop();
00113     printf("\r\ntime %f, %f KBytes/sec\r\n", t.read(), 0x20000 / 1024 / t.read());
00114 
00115 }