Takehisa Oneta / Mbed 2 deprecated Hello-FM25W256

FM25W256, it was write protect first. 初期状態ではライトプロテクトがかかっていることに対応。 "The WREN command must be issued prior to any write operation." from FM25W256 datasheet.

Dependencies:   FM25W256 mbed

Fork of Hello-FM25W256 by Toyomasa Watarai

Diff: main.cpp

Revision:
1:be908b1aafe6
Parent:
0:3efb18460968
Child:
2:980e3d46d20e
--- a/main.cpp	Fri Mar 04 13:48:22 2016 +0000
+++ b/main.cpp	Fri Mar 04 15:50:11 2016 +0000
@@ -1,56 +1,8 @@
 #include "mbed.h"
+#include "FM25W256.h"
 
 Serial pc(USBTX, USBRX);
-SPI fram(dp2, dp1, dp6);
-DigitalOut _cs(dp18);
-
-#define CMD_WREN   0x06
-#define CMD_WRDI   0x04
-#define CMD_RDSR   0x05
-#define CMD_WRSR   0x01
-#define CMD_READ   0x03
-#define CMD_WRITE  0x02
-
-void write_byte(uint16_t address, uint8_t data)
-{
-    _cs = 0;
-    fram.write(CMD_WREN);
-    _cs = 1;
-
-    _cs = 0;
-    fram.write(CMD_WRITE);
-    fram.write(address >> 8);
-    fram.write(address & 0xFF);
-    fram.write(data & 0xFF);
-    _cs = 1;
-}
-
-uint8_t read_byte(uint16_t address)
-{
-    uint8_t data;
-
-    _cs = 0;
-    fram.write(CMD_READ);
-    fram.write(address >> 8);
-    fram.write(address & 0xFF);
-    data = fram.write(0);
-    _cs = 1;
-
-    return data;
-}
-
-void read_bytes(uint16_t address, uint8_t *buf, uint16_t size)
-{
-    _cs = 0;
-    fram.write(CMD_READ);
-    fram.write(address >> 8);
-    fram.write(address & 0xFF);
-    while (size--) {
-        *buf++ = fram.write(0);
-    }
-    _cs = 1;
-}
-
+FM25W256 f_ram(dp2, dp1, dp6, dp18);
 
 void read_test()
 {
@@ -58,8 +10,7 @@
     for(int i=0; i<16; i++) {
         pc.printf("0x%04X : ", i * 16);
         for(int j=0; j<16; j++) {
-            //pc.printf("%02X ", fram.write(0));
-            pc.printf("%02X ", read_byte(adrs++));
+            pc.printf("%02X ", f_ram.read(adrs++));
         }
         pc.printf("\n");
     }
@@ -67,17 +18,15 @@
     
 void write_test()
 {
-    for(int i=0; i<256; i++) {
-        write_byte(i, i);
+    uint8_t buf[16];
+    for(int i=0; i<16; i++) {
+        buf[i] = (15 - i);
     }
+    f_ram.write(0, buf, 16);
 }
 
 int main()
 {
-    fram.format(8, 0);
-    fram.frequency(20000000);
-    _cs = 1;
-
     pc.printf("\nFM25W256 test program - write test? (y/n) ");
     if (pc.getc() == 'y') {
         write_test();