Diff: max77801.cpp

Revision:

0:b9790d4a35fd

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/max77801.cpp	Mon Nov 20 14:57:49 2017 +0000
@@ -0,0 +1,347 @@
+/*******************************************************************************
+ * Copyright (C) 2017 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 "max77801.h"
+ 
+/***** Definitions *****/
+#define I2C_ADDR            (0x18<<1)
+ 
+/**
+  * MAX77801 constructor.
+  *
+  * @param i2c I2C object to use.
+  */
+MAX77801::MAX77801(I2C *i2c) :
+    i2c_(i2c)
+{
+    i2c_owner = false;
+}
+ 
+/**
+  * MAX77801 destructor.
+  */
+MAX77801::~MAX77801()
+{
+    if(i2c_owner) {
+        delete i2c_;
+    }
+}
+
+/**
+  * @brief   Initialize MAX77801
+  */
+int32_t MAX77801::init()
+{ 
+    int32_t data;
+    
+    data = write_register(REG_CONFIG1, 0x0E);
+    if(data < 0)
+        return -1;
+    
+    data = write_register(REG_CONFIG2, 0x70);
+    if(data < 0)
+        return -1;
+        
+    return 0;
+}
+ 
+/**
+  * @brief   Read Register
+  * @details Reads data from MAX77801 register
+  *
+  * @param   reg_addr Register to read
+  * @returns data if no errors, -1 if error.
+  */
+int32_t MAX77801::read_register(MAX77801::registers_t reg_no)
+{
+    char data;
+ 
+    data = reg_no;
+    if (i2c_->write(I2C_ADDR, &data, 1, true) != 0) {
+        return -1;
+    }
+ 
+    if (i2c_->read(I2C_ADDR | 0x01, &data, 1) != 0) {
+        return -1;
+    }
+ 
+    return (0x0 + data);
+}
+ 
+/**
+  * @brief   Write Register
+  * @details Writes data to MAX77756 register
+  *
+  * @param   reg_addr Register to write
+  * @param   reg_data Data to write
+  * @returns 0 if no errors, -1 if error.
+  */
+int32_t MAX77801::write_register(MAX77801::registers_t reg_no, char reg_data)
+{
+    char data[2];
+ 
+    data[0] = reg_no;
+    data[1] = reg_data;
+    if (i2c_->write(I2C_ADDR, data, 2) != 0) {
+        return -1;
+    }
+ 
+    return 0;
+}
+
+/**
+  * @brief   Update Register data
+  * @details Update bits data of a register 
+  *
+  * @param   reg_no Register Number to be updated
+  * @param   mask Mask Data
+  * @param   reg_data bit data
+  * @returns 0 if no errors, -1 if error.
+  */
+int32_t MAX77801::update_register
+(MAX77801::registers_t reg_no, char reg_mask,  char reg_data)
+{
+    int32_t data;
+ 
+    data = read_register(reg_no);
+    if(data < 0)
+        return -1;
+    
+    data &= ~reg_mask;
+    data |= reg_data;
+    
+    data = write_register(reg_no, (char)(data & 0xff));
+    if(data < 0)
+        return -1;
+    return 0;
+}
+
+/**
+  * @brief   Get version info
+  * @details 0 : Plain
+  *
+  * @param   None
+  * @returns version info.
+  */
+char*  MAX77801::get_version()
+{
+    int32_t data;
+    
+    data = read_register(REG_DEVICE_ID);
+    switch ((data >> 3) & 0xf)
+    {
+        case 0x0: 
+            return "PLAIN";
+        case 0x1: 
+            return "-1Z";
+        case 0x2:
+            return "-2Z";        
+    }
+    return "UNKNOWN";
+}
+
+/**
+  * @brief   Get revision info
+  * @details 0x1 : PASS1
+  *          0x2 : PASS2  
+  *          0x3 : PASS3
+  * @param   None
+  * @returns revision info.
+  */
+char*  MAX77801::get_revision()
+{
+    int32_t data;
+    
+    data = read_register(REG_DEVICE_ID);
+    switch(data & 0x7)
+    {
+        case 0x0: 
+            return "PASS1";
+        case 0x1: 
+            return "PASS2";
+        case 0x2:
+            return "PASS3";        
+    }
+    return "UNKNOWN";    
+}
+
+/**
+  * @brief   Get status
+  * @details Get status register data
+  *          BIT3 : Junction Temperature info
+  *          BIT2 : Buck Boost POK Status
+  *          BIT1 : Buck Boost OVP Status
+  *          BIT0 : Buck Boost OCP Status
+  * @param   None
+  * @returns status register data.
+  */
+int32_t MAX77801::get_status()
+{    
+    int32_t data;
+    
+    data = read_register(REG_DEVICE_ID);
+    if(data < 0)
+        return -1;
+    return (data & 0x0f);
+}
+
+/**
+  * @brief   config enable bit
+  * @details Set a Config bit controlled using enabled/disabled
+  * @param   config : config bit
+  * @param   en : enable/disable
+  * @returns 0 if no errors, -1 if error.
+  */
+int32_t MAX77801::config_enable(MAX77801::config_enabled_t config,
+                                    MAX77801::enable_t en)
+{    
+    int32_t data;
+    
+    switch(config)
+    {
+        case ACTIVE_DISCHARGE:
+            data = update_register(REG_CONFIG1, 0x02, ((char)en) <<1);
+        break;
+        case FORCED_PWM:
+            data = update_register(REG_CONFIG1, 0x01, ((char)en) <<0);
+        break;
+        case BUCK_BOOST_OUTPUT:
+            data = update_register(REG_CONFIG2, 0x40, ((char)en) <<6);
+        break;
+        case EN_PULL_DOWN:
+            data = update_register(REG_CONFIG2, 0x20, ((char)en) <<5);
+        break;
+        default:
+            return -1;
+    }
+    
+    if(data < 0)
+        return -1;
+    return 0;
+}
+
+/**
+  * @brief   Config Ramp Up
+  * @details Set BB_RU_SR
+  * 
+  * @param   config : config value
+  * @returns 0 if no errors, -1 if error.
+  */           
+int32_t MAX77801::config_ramp_up(MAX77801::ramp_up_rate_t config)
+{
+    int32_t data;
+    
+    data = update_register(REG_CONFIG1, 0x20, ((char)config) <<5);
+    if(data < 0)
+        return -1;
+    return 0;
+}
+
+/**
+  * @brief   Config Ramp Down
+  * @details Set BB_RD_SR
+  * 
+  * @param   config : config value
+  * @returns 0 if no errors, -1 if error.
+  */           
+int32_t MAX77801::config_ramp_down(MAX77801::ramp_dn_rate_t config)
+{
+    int32_t data;
+    
+    data = update_register(REG_CONFIG1, 0x10, ((char)config) <<4);
+    if(data < 0)
+        return -1;
+    return 0;
+}
+
+/**
+  * @brief   Config OVP Threshold
+  * @details Set BB_OVP_TH bits
+  * 
+  * @param   config : config value
+  * @returns 0 if no errors, -1 if error.
+  */           
+int32_t MAX77801::config_ovp_threshold(MAX77801::output_ovp_threshold_t config)
+{    
+    int32_t data;
+    
+    data = update_register(REG_CONFIG1, 0x0C, ((char)config) <<2);
+    if(data < 0)
+        return -1;
+    return 0;
+}
+
+/**
+  * @brief   config pokpol active bit
+  * @details Set POK_POL Bit
+  * 
+  * @param   lowHigh : active value
+  * @returns 0 if no errors, -1 if error.
+  */           
+int32_t MAX77801::config_pokpol_active(MAX77801::low_high_t lowHigh)
+{
+    int32_t data;
+    
+    data = update_register(REG_CONFIG2, 0x10, ((char)lowHigh) <<4);
+    if(data < 0)
+        return -1;
+    return 0;
+}
+
+/**
+  * @brief   Set VOUT Voltage when DVS = Low
+  * @details Set Vout Voltage
+  *
+  * @param   vout level from 2.6000V ~ 4.1875V with 0.0125V step
+  * @returns 0 if no errors, -1 if error.
+  */
+  
+int32_t MAX77801::set_vout(double level, MAX77801::low_high_t dvs)
+{
+    int32_t ret_val = 0;
+    char reg_data = 0;
+    
+    if(level < 2.6000 || level > 4.1875)
+        return -1;
+    
+    reg_data = (char)((level-2.6000)*80);
+    
+    if(dvs == VAL_LOW)
+        ret_val = write_register(REG_VOUT_DVS_L,reg_data);
+    else
+        ret_val = write_register(REG_VOUT_DVS_H,reg_data);
+    
+    if(ret_val < 0)
+        return -1;
+    return 0;
+}
+