Diff: SPI25LC080.h

Revision:

1:819f21483c01

Parent:

0:aa38ad0bf51d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SPI25LC080.h	Thu Nov 28 12:17:45 2013 +0000
@@ -0,0 +1,67 @@
+#ifndef SPI25LC080_H
+#define SPI25LC080_H
+
+/**
+ * Interface to the 25LC080 chip (http://ww1.microchip.com/downloads/en/DeviceDoc/22151b.pdf)
+ *
+ * @code
+ * #include "mbed.h"
+ *
+ * SPI25LC080 e2prom;
+ *
+ * int main(void) {
+ *    uint8_t buff[20];
+ *    uint16_t addr = ...
+ *
+ *    while(1) {
+ *       // read from e2prom
+ *       e2prom.read(addr, buff, 20);
+ *
+ *       // write to e2prom
+ *       e2prom.write(addr, buff, 20);
+ *    }
+ * }
+ * @endcode
+ */
+class SPI25LC080 {
+public:
+
+    /** Create an interface to the 25LC080 chip
+     *
+     *  @param mosi the SPI MOSI pin
+     *  @param sclk the SPI SCLK pin
+     *  @param miso the SPI MISO pin
+     */
+    SPI25LC080(PinName mosi = P0_14, PinName sclk = P0_12, PinName miso = P0_15, PinName ssel = P0_13);
+    
+    /** Reads from the E2PROM
+     *
+     *  @param address the address to read from
+     *  @param pBuf where to store the read data
+     *  @param length the number of bytes to read
+     */
+    void read(uint16_t address, uint8_t* pData, uint32_t length);
+
+    /** Writes to the E2PROM
+     *
+     *  @param address the address to write to
+     *  @param pBuf the data to write
+     *  @param length the number of bytes to write
+     */
+    void write(uint16_t address, uint8_t* pData, uint32_t length);
+    
+    /** Reads the status register 
+     */
+    uint8_t status();
+
+private:
+    SPI        m_spi;
+    DigitalOut m_ssel;
+    
+    /** Sets the write enable latch/bit 
+     */
+    void write_enable();    
+};
+
+#endif
+