MAX77801 Demo. The MAX77801 is a high-current, high-efficiency buck-boost regulator and features I2C-compatible, 2-wire serial interface consisting of a bidirectional serial-data line (SDA) and a serial-clock line (SCL). Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX77801.pdf Tested using MAX32630FTHR. This Demo simply provides the test interface via USB Serial port.
Dependencies: USBDevice max32630fthr max77801 mbed
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Diff: main.cpp
- Revision:
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diff -r 000000000000 -r c1437a5e420b main.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Tue Nov 21 05:44:30 2017 +0000 @@ -0,0 +1,161 @@ +/********************************************************************** +* 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 "mbed.h" +#include "max77801.h" +#include "USBSerial.h" + +// Virtual serial port over USB +USBSerial microUSB; + +int main() +{ + int c; + int32_t rData; + double vout_l = 3.3000; + double vout_h = 3.7500; + + DigitalOut rLED(LED1, LED_OFF); + DigitalOut gLED(LED2, LED_OFF); + DigitalOut bLED(LED3, LED_OFF); + + I2C i2cBus(P5_7, P6_0); + i2cBus.frequency(400000); + + MAX77801 max77801(&i2cBus); + wait_ms(100); + + rData = max77801.init(); + if(rData<0) + { + microUSB.printf("MAX77801 Fail to Init. Stopped\r\n"); + rLED = true; + } + else + { + microUSB.printf("MAX77801 Init Done\r\n"); + } + + while(1) + { + gLED = true;rLED = false; + microUSB.printf("----- [ MAX77801 DEMO ] Usage ----- \r\n"); + microUSB.printf("i : Set Registers to POR Staus \r\n"); + microUSB.printf("+ : Increase VOUT L&H \r\n"); + microUSB.printf("- : Dncrease VOUT L&H \r\n"); + microUSB.printf("s : Read Status Registser \r\n"); + microUSB.printf("e : Enable Buck Boost \r\n"); + microUSB.printf("d : Disable Buck Boost \r\n"); + microUSB.printf("\r\nInput >> "); + + c = microUSB.getc(); + + gLED = false;rLED = true; + switch(c) + { + // ReInit + case 'i': + microUSB.printf("Init to POR Status\r\n"); + //Set to POR Status + max77801.init(); + vout_l = 3.3000; + rData = max77801.write_register(MAX77801::REG_VOUT_DVS_L, 0x38); + if(rData < 0) + microUSB.printf("Error: to access data\r\n"); + vout_h = 3.7500; //WLP + rData = max77801.write_register(MAX77801::REG_VOUT_DVS_H, 0x40); + if(rData < 0) + microUSB.printf("Error: to access data\r\n"); + break; + + //Control VOUT + case '+': + microUSB.printf("Increase VOUT\r\n"); + vout_l += 0.0125; + rData = max77801.set_vout(vout_l, MAX77801::VAL_LOW); + if(rData < 0) + microUSB.printf("Error: to access data\r\n"); + vout_h += 0.0125; + rData = max77801.set_vout(vout_h, MAX77801::VAL_HIGH); + if(rData < 0) + microUSB.printf("Error: to access data\r\n"); + break; + + case '-': + microUSB.printf("Decrease VOUT\r\n"); + vout_l -= 0.0125; + rData = max77801.set_vout(vout_l, MAX77801::VAL_LOW); + if(rData < 0) + microUSB.printf("Error: to access data\r\n"); + vout_h -= 0.0125; + rData = max77801.set_vout(vout_h, MAX77801::VAL_HIGH); + if(rData < 0) + microUSB.printf("Error: to access data\r\n"); + break; + + //Read Status Register + case 's': + microUSB.printf("Read Status\r\n"); + rData = max77801.get_status(); + if(rData < 0) + microUSB.printf("Error: to access data\r\n"); + else + microUSB.printf("Status 0x%2X\r\n",rData); + break; + + //Buck Boost Enable/Disable + case 'e': + microUSB.printf("Enable Buck Boost\r\n"); + rData = max77801.config_enable(MAX77801::BUCK_BOOST_OUTPUT, + MAX77801::VAL_ENABLE); + if(rData < 0) + microUSB.printf("Error: to access data\r\n"); + break; + + case 'd': + microUSB.printf("Disable Buck Boost\r\n"); + rData = max77801.config_enable(MAX77801::BUCK_BOOST_OUTPUT, + MAX77801::VAL_DISABLE); + if(rData < 0) + microUSB.printf("Error: to access data\r\n"); + break; + + + default: + microUSB.printf("Unknown Command\r\n"); + break; + } + + wait_ms(1000); + } +}