Revision 0:7ebbac9efdb4, committed 2018-05-14

Comitter:

okini3939

Date:

Mon May 14 04:23:31 2018 +0000

Commit message:

1st build

Changed in this revision

diff -r 000000000000 -r 7ebbac9efdb4 DACx578.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DACx578.cpp	Mon May 14 04:23:31 2018 +0000
@@ -0,0 +1,68 @@
+/*
+ * DAC5578 (8bit)
+ * DAC6578 (10bit)
+ * DAC7578 (12bit)
+ */
+
+#include "DACx578.h"
+
+DACx578::DACx578 (PinName sda, PinName scl, int addr, enum DEVICE device) : _i2c(sda, scl) {
+    _addr = addr;
+    _device = device;
+    init();
+}
+
+DACx578::DACx578 (I2C &i2c, int addr, enum DEVICE device) : _i2c(i2c) {
+    _addr = addr;
+    _device = device;
+    init();
+}
+
+int DACx578::init () {
+    char buf[3];
+
+    buf[0] = 0x70; // reset
+    buf[1] = 0x00;
+    buf[2] = 0x00;
+    if (_i2c.write(_addr, buf, 3)) return -1;
+    wait_ms(10);
+
+    buf[0] = 0x40; // power on
+    buf[1] = 0x1f;
+    buf[2] = 0xe0;
+    if (_i2c.write(_addr, buf, 3)) return -1;
+/*
+    buf[0] = 0x60; // ignore LDAC
+    buf[1] = 0xff;
+    buf[2] = 0x00;
+    if (_i2c.write(_addr, buf, 3)) return -1;
+*/
+    return 0;
+}
+
+int DACx578::write (int channel, int value, int ldac) {
+    char buf[3];
+
+    buf[0] = (ldac ? 0x30 : 0x00) | (channel & 0x0f); // Individual Software LDAC / Input Register
+    buf[1] = (value >> _device) & 0xff;
+    buf[2] = ((8 - value) << _device) & 0xff;
+    return _i2c.write(_addr, buf, 3);
+}
+
+int DACx578::ldacWrite (int channel, int value) {
+    char buf[3];
+
+    buf[0] = 0x20 | (channel & 0x0f); // Global Software LDAC
+    buf[1] = (value >> _device) & 0xff;
+    buf[2] = ((8 - value) << _device) & 0xff;
+    return _i2c.write(_addr, buf, 3);
+}
+
+int DACx578::update (int channel) {
+    char buf[3];
+
+    buf[0] = 0x10 | (channel & 0x0f); // Register Update
+    buf[1] = 0;
+    buf[2] = 0;
+    return _i2c.write(_addr, buf, 3);
+}

diff -r 000000000000 -r 7ebbac9efdb4 DACx578.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DACx578.h	Mon May 14 04:23:31 2018 +0000
@@ -0,0 +1,36 @@
+/*
+ * DAC5578 (8bit)
+ * DAC6578 (10bit)
+ * DAC7578 (12bit)
+ */
+
+#ifndef __DACx578_h__
+#define __DACx578_h__
+
+#include "mbed.h"
+
+#define DACx578_I2C_ADDR 0x90
+
+class DACx578 {
+public:
+    enum DEVICE {
+        DAC5578 = 0,
+        DAC6578 = 2,
+        DAC7578 = 4,
+    };
+
+    DACx578 (PinName sda, PinName scl, int addr, enum DEVICE device = DAC5578);
+    DACx578 (I2C& i2c, int addr, enum DEVICE device = DAC5578);
+
+    int init ();
+    int write (int channel, int value, int ldac = 0);
+    int ldacWrite (int channel, int value);
+    int update (int channel);
+
+protected:
+    I2C _i2c;
+    int _addr;
+    int _device;
+};
+
+#endif