Diff: FM25W256.cpp

Revision:

0:5a552209903c

Child:

1:bb2b1e4bfb6e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/FM25W256.cpp	Fri Mar 04 15:49:51 2016 +0000
@@ -0,0 +1,75 @@
+#include "mbed.h"
+#include "FM25W256.h"
+
+FM25W256::FM25W256(PinName mosi, PinName miso, PinName clk, PinName cs)
+    : _spi(mosi, miso, clk), _cs(cs)
+{
+    _spi.format(8, 0);
+    _spi.frequency(20000000);
+    _cs = 1;
+}
+
+FM25W256::FM25W256(SPI &spi, PinName cs)
+    : _spi(spi), _cs(cs) 
+{
+    _spi.format(8, 0);
+    _spi.frequency(20000000);
+    _cs = 1;
+
+}
+
+void FM25W256::write(uint16_t address, uint8_t data)
+{
+    _cs = 0;
+    _spi.write(CMD_WREN);
+    _cs = 1;
+
+    _cs = 0;
+    _spi.write(CMD_WRITE);
+    _spi.write(address >> 8);
+    _spi.write(address & 0xFF);
+    _spi.write(data);
+    _cs = 1;
+}
+
+void FM25W256::write(uint16_t address, uint8_t *data, uint16_t size)
+{
+    _cs = 0;
+    _spi.write(CMD_WREN);
+    _cs = 1;
+
+    _cs = 0;
+    _spi.write(CMD_WRITE);
+    _spi.write(address >> 8);
+    _spi.write(address & 0xFF);
+    while(size--) {
+        _spi.write(*data++);
+    }
+    _cs = 1;
+}
+
+uint8_t FM25W256::read(uint16_t address)
+{
+    uint8_t data;
+
+    _cs = 0;
+    _spi.write(CMD_READ);
+    _spi.write(address >> 8);
+    _spi.write(address & 0xFF);
+    data = _spi.write(0);
+    _cs = 1;
+
+    return data;
+}
+
+void FM25W256::read(uint16_t address, uint8_t *buf, uint16_t size)
+{
+    _cs = 0;
+    _spi.write(CMD_READ);
+    _spi.write(address >> 8);
+    _spi.write(address & 0xFF);
+    while (size--) {
+        *buf++ = _spi.write(0);
+    }
+    _cs = 1;
+}