Diff: MCP3204.h

Revision:

0:b5950cd5e330

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MCP3204.h	Mon Mar 23 07:49:58 2015 +0000
@@ -0,0 +1,94 @@
+/* mbed MCP3204 Library, for driving the 2.7V 4-Channel/8-Channel 12-Bit A/D Converters with SPI™ Serial Interface
+ * Copyright (c) 2015, Created by Steen Joergensen (stjo2809)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+ 
+#include "mbed.h"
+
+#ifndef MBED_MCP3204_H
+#define MBED_MCP3204_H
+
+//=============================================================================
+// Declaration of variables & custom #defines
+//=============================================================================
+
+#define CH0             0x00       // Channel 0 for single and for differential is CH0 = IN+ and CH1 = IN- 
+#define CH1             0x40       // Channel 1 for single and for differential is CH0 = IN- and CH1 = IN+
+#define CH2             0x80       // Channel 2 for single and for differential is CH2 = IN+ and CH3 = IN-
+#define CH3             0xC0       // Channel 3 for single and for differential is CH2 = IN- and CH3 = IN+
+#define SINGLE          0x06       // Single command
+#define DIFFERENTIAL    0x04       // Differential command 
+
+//=============================================================================
+// Functions Declaration
+//=============================================================================
+
+/** Interface to the 4-Channel 12-Bit A/D Converters with SPI interface
+ *
+  *  Using the driver:
+ *   - remenber to setup SPI in main routine or use pins instance.
+ *
+ *  Defaults in this driver on start up:
+ *   - Datasheet start up
+ */
+class MCP3204 {
+public:
+    /** Create an instance of the MCP3204 connected via specfied SPI instance.
+     *
+     * @param spi The mbed SPI instance (make in main routine)
+     * @param nCs The SPI chip select pin.
+     */
+    MCP3204(SPI& spi, PinName nCs);
+    
+    /** Create an instance of the MCP4261 connected with SPI pins.
+     *
+     * @param mosi The SPI Master Output, Slave Input pin.
+     * @param miso The SPI Master Input, Slave Output pin. 
+     * @param sck The SPI Serial Clock pin.
+     * @param nCs The SPI chip select pin.
+     */
+    MCP3204(PinName mosi, PinName miso,PinName sck, PinName nCs);
+    
+
+    /** Read from single channel.
+     *
+     * use defines to simplify use of function ( CH0, CH1, CH2, CH3)
+     * @param channel The channel to receive the 12 bits value from.
+     */
+    int sgl(char channel);
+    
+    /** Read from differential channel.
+     *
+     * use defines to simplify use of function ( CH0, CH1, CH2, CH3)
+     * @param channel The channel to receive the 12 bits value from.
+     */
+    int diff(char channel);
+      
+
+private:
+    SPI& _spi;
+    DigitalOut _nCs;
+   
+    int _make_value_from_responce(int responce_msb, int responce_lsb);    
+    int _read(char sgl_or_diff, char channel);             
+
+};
+
+#endif
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