Diff: MAX77650.cpp

Revision:

0:d29ae4cd4af7

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MAX77650.cpp	Tue Apr 24 20:09:13 2018 +0000
@@ -0,0 +1,167 @@
+
+/*******************************************************************************
+ * Copyright (C) 2018 Maxim Integrated Products, Inc., All Rights Reserved.
+ *
+ * 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 MAXIM INTEGRATED 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.
+ *
+ * Except as contained in this notice, the name of Maxim Integrated
+ * Products, Inc. shall not be used except as stated in the Maxim Integrated
+ * Products, Inc. Branding Policy.
+ *
+ * The mere transfer of this software does not imply any licenses
+ * of trade secrets, proprietary technology, copyrights, patents,
+ * trademarks, maskwork rights, or any other form of intellectual
+ * property whatsoever. Maxim Integrated Products, Inc. retains all
+ * ownership rights.
+ *******************************************************************************
+ */
+
+#include "MAX77650.h"
+
+#define SBB2_TV_MIN_MV 800
+#define SBB2_TV_MAX_MV 3950
+#define SBB2_TV_LSB_MV 50
+
+//******************************************************************************
+MAX77650::MAX77650(I2C &i2c, PinName pwrHldPin, int addr) :
+    i2c(i2c)
+{
+    devAddr = addr;
+    pwrHld = new DigitalOut(pwrHldPin, 1);
+}
+
+//******************************************************************************
+MAX77650::~MAX77650()
+{
+    delete pwrHld;
+}
+
+//******************************************************************************
+int MAX77650::readReg(reg_t reg, char *val)
+{
+    char wbuf[] = { reg };
+
+    if (!(i2c.write(devAddr, wbuf, sizeof(wbuf), true))) {
+        if (!(i2c.read(devAddr, val, 1))) {
+            return MAX77650_NO_ERROR;
+        }
+    }
+
+    return MAX77650_ERROR;
+}
+
+//******************************************************************************
+int MAX77650::writeReg(reg_t reg, char val)
+{
+    char wbuf[] = { reg, val };
+
+    if (!(i2c.write(devAddr, wbuf, sizeof(wbuf)))) {
+        return MAX77650_NO_ERROR;
+    }
+
+    return MAX77650_ERROR;
+}
+
+//******************************************************************************
+int MAX77650::writeReg(const char *buf, int len)
+{
+    if (!(i2c.write(devAddr, buf, len))) {
+        return MAX77650_NO_ERROR;
+    }
+
+    return MAX77650_ERROR;
+}
+
+//******************************************************************************
+int MAX77650::cid(void) {
+    char rbuf[1];
+
+    if (readReg(CID, rbuf)) {
+        return MAX77650_ERROR;
+    }
+
+    return *rbuf;
+}
+
+//******************************************************************************
+int MAX77650::enableLDO(void)
+{
+    char ade_flag[1];
+
+    if (readReg(CNFG_LDO_B, ade_flag)) {
+        return MAX77650_ERROR;
+    }
+
+    *ade_flag &= 0x08;
+
+    return writeReg(CNFG_LDO_B, *ade_flag | 0x06);
+}
+
+//******************************************************************************
+int MAX77650::disableLDO(void)
+{
+    char ade_flag[1];
+
+    if (readReg(CNFG_LDO_B, ade_flag)) {
+        return MAX77650_ERROR;
+    }
+
+    *ade_flag &= 0x08;
+
+    return writeReg(CNFG_LDO_B, *ade_flag | 0x04);
+}
+
+//******************************************************************************
+int MAX77650::setSBB2VoltageMV(uint32_t tv_mv)
+{
+    uint32_t tv_code;
+    char ip_code[1];
+
+    if ((tv_mv > SBB2_TV_MAX_MV) || (tv_mv < SBB2_TV_MIN_MV) || (tv_mv % SBB2_TV_LSB_MV)) {
+        return MAX77650_ERROR;
+    }
+
+    tv_code = (tv_mv - SBB2_TV_MIN_MV) / SBB2_TV_LSB_MV;
+
+    if (readReg(CNFG_SBB2_A, ip_code)) {
+        return MAX77650_ERROR;
+    }
+
+    *ip_code &= 0xC0;
+
+    return writeReg(CNFG_SBB2_A, tv_code | *ip_code);
+}
+
+//******************************************************************************
+int MAX77650::setSBB2Voltage(float tv_v)
+{
+    return setSBB2VoltageMV(tv_v * 1000);
+}
+
+//******************************************************************************
+void MAX77650::assertPowerHold(void)
+{
+    pwrHld->write(1);
+}
+
+//******************************************************************************
+void MAX77650::deassertPowerHold(void)
+{
+    pwrHld->write(0);
+}