main.cpp

00001 #include "mbed.h"
00002 #include "MB85RSxx_SPI.h"
00003 
00004 DigitalOut myled(LED1);
00005 Serial pc(USBTX, USBRX);
00006 
00007 #if defined(TARGET_LPC1768)
00008 MB85RSxx_SPI fram(p5, p6, p7, p8); // mosi, miso, sclk, cs
00009 #elif defined(TARGET_LPC1114)
00010 MB85RSxx_SPI fram(dp2, dp1, dp6, dp9); // mosi, miso, sclk, cs
00011 #else // Arduino R3 Shield form factor
00012 MB85RSxx_SPI fram(D11, D12, D13, D10); // mosi, miso, sclk, cs
00013 #endif
00014 
00015 int main()
00016 {
00017     uint8_t buf[16];
00018     uint32_t address;
00019 
00020     pc.baud(115200);
00021     pc.printf("\nFujitsu MB85RSxxx FRAM test program\n\n");
00022 
00023     // Read device ID and detect memory density for addressing
00024     fram.read_device_id(buf);
00025     pc.printf("read device ID = 0x%x 0x%x 0x%x 0x%x\n", buf[0], buf[1], buf[2], buf[3]);
00026 
00027     fram.write_enable();
00028     pc.printf("read status (WREN) = 0x%x\n", fram.read_status());
00029 
00030     fram.write_disable();
00031     pc.printf("read status (WRDI) = 0x%x\n", fram.read_status());
00032 
00033     // Write 0 data
00034     fram.write_enable();
00035     fram.fill(0, 0, 256);
00036 
00037     // Prepare write data
00038     for (int i = 0; i < 16; i++) {
00039         buf[i] = i;
00040     }
00041 
00042     // Write data with write enable
00043     fram.write_enable();
00044     fram.write(0x00, buf, 16);
00045 
00046     // Attempt to write data (not written)
00047     fram.write(0x10, buf, 16);
00048 
00049     // Write data with write enable
00050     fram.write_enable();
00051     fram.write(0x20, buf, 16);
00052 
00053     // Read data
00054     for (address = 0; address < 0x80; address += 16) {
00055         fram.read(address, buf, 16);
00056         pc.printf("%08X : ", address);
00057         for (int i = 0; i < 16; i++) {
00058             pc.printf("%02X ", buf[i]);
00059         }
00060         pc.printf("\n");
00061     }
00062 
00063     // Write number from 0 to 255
00064     pc.printf("\n");
00065     for (address = 0; address < 0x100; address++) {
00066         fram.write_enable();
00067         fram.write(address, (uint8_t)address);
00068     }
00069     // Read data
00070     for (address = 0; address < 0x100; address += 16) {
00071         fram.read(address, buf, 16);
00072         pc.printf("%08X : ", address);
00073         for (int i = 0; i < 16; i++) {
00074             pc.printf("%02X ", buf[i]);
00075         }
00076         pc.printf("\n");
00077     }
00078 
00079     while(1) {
00080         myled = 1;
00081         wait(0.2);
00082         myled = 0;
00083         wait(0.2);
00084     }
00085 }
00086