Experience voltage versatility at its best with TPS65132 and PIC18F45K80
Dual dynamo: Charging into the positive and negative zones
Published Nov 01, 2023
Click board™
Boost-INV 3 Click
Dev Board
Curiosity HPC
Compiler
NECTO Studio
MCU
PIC18F45K80
Achieve voltage symmetry effortlessly with our power supply. Where positives and negatives align, our solution stands ready to meet your diverse electrical requirements with precision and ease.
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Hardware Overview
How does it work?
Boost-INV 3 Click is based on the TPS65132, a dual-output power supply from Texas Instruments. The TPS65132 operates with a single inductor scheme to provide high efficiency with a small solution size. The synchronous boost converter generates a positive voltage regulated by an integrated LDO, providing the positive supply rail on the +VOUT terminal. The negative supply rail, available on the -VOUT terminal, is generated by an integrated negative charge pump driven from the boost converter output REG pin. The output voltage is
programmable via an I2C compatible interface, from ±6V to ±4V in 100mV steps with ±5.4V pre-programmed output voltage and a maximum 80mA output current. Both output voltages can be set independently, and their sequencing is also independent. This Click board™ communicates with the host MCU using the standard I2C 2-Wire interface, with a maximum clock frequency in Fast data transfer of up to 400kHz (400kbps). Pulling ENP or ENN pins of the mikroBUS socket to a low logic state turns off either rail (+VOUT or -VOUT,
respectively) and pulling both pins to a low logic state turns off the device entirely (the internal oscillator of the TPS65132 continues running to allow access to the I2C interface). This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used for further development.
Features overview
Development board
Curiosity HPC, standing for Curiosity High Pin Count (HPC) development board, supports 28- and 40-pin 8-bit PIC MCUs specially designed by Microchip for the needs of rapid development of embedded applications. This board has two unique PDIP sockets, surrounded by dual-row expansion headers, allowing connectivity to all pins on the populated PIC MCUs. It also contains a powerful onboard PICkit™ (PKOB), eliminating the need for an external programming/debugging tool, two mikroBUS™ sockets for Click board™ connectivity, a USB connector, a set of indicator LEDs, push button switches and a variable potentiometer. All
these features allow you to combine the strength of Microchip and Mikroe and create custom electronic solutions more efficiently than ever. Each part of the Curiosity HPC development board contains the components necessary for the most efficient operation of the same board. An integrated onboard PICkit™ (PKOB) allows low-voltage programming and in-circuit debugging for all supported devices. When used with the MPLAB® X Integrated Development Environment (IDE, version 3.0 or higher) or MPLAB® Xpress IDE, in-circuit debugging allows users to run, modify, and troubleshoot their custom software and hardware
quickly without the need for additional debugging tools. Besides, it includes a clean and regulated power supply block for the development board via the USB Micro-B connector, alongside all communication methods that mikroBUS™ itself supports. Curiosity HPC development board allows you to create a new application in just a few steps. Natively supported by Microchip software tools, it covers many aspects of prototyping thanks to many number of different Click boards™ (over a thousand boards), the number of which is growing daily.
Microcontroller Overview
MCU Card / MCU
Architecture
PIC
MCU Memory (KB)
32
Silicon Vendor
Microchip
Pin count
40
RAM (Bytes)
3648
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Schematic
Step by step
Project assembly
Start by selecting your development board and Click board™. Begin with the Curiosity HPC as your development board.
Track your results in real time
Application Output
After loading the code example, pressing the "DEBUG" button builds and programs it on the selected setup.
After programming is completed, a header with buttons for various actions available in the IDE appears. By clicking the green "PLAY "button, we start reading the results achieved with Click board™.
Upon completion of programming, the Application Output tab is automatically opened, where the achieved result can be read. In case of an inability to perform the Debug function, check if a proper connection between the MCU used by the setup and the CODEGRIP programmer has been established. A detailed explanation of the CODEGRIP-board connection can be found in the CODEGRIP User Manual. Please find it in the RESOURCES section.
Software Support
Library Description
This library contains API for Boost-INV 3 Click driver.
Key functions:
boostinv3_set_enp- Boost-INV 3 set ENP pin state function.boostinv3_set_pos_out- Boost-INV 3 set positive output voltage function.boostinv3_set_neg_out- Boost-INV 3 set negative output voltage function.
Open Source
Code example
This example can be found in NECTO Studio. Feel free to download the code, or you can copy the code below.
/*!
* @file main.c
* @brief Boost-INV 3 Click example
*
* # Description
* This library contains API for the Boost-INV 3 Click driver.
* This driver provides the functions to set the output voltage treshold.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initialization of I2C module and log UART.
* After driver initialization, default settings enable the positive and
* negative output and sets the output voltage to 4 V.
*
* ## Application Task
* This example demonstrates the use of the Boost-INV 3 Click board by changing
* output voltage every 5 seconds starting from 4 V up to 6 V.
*
* @author Stefan Ilic
*
*/
#include "board.h"
#include "log.h"
#include "boostinv3.h"
#define BOOSTINV3_MIN_VOL_LVL 4.0f
#define BOOSTINV3_INCREMENT 0.1f
static boostinv3_t boostinv3;
static log_t logger;
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
boostinv3_cfg_t boostinv3_cfg; /**< Click config object. */
/**
* Logger initialization.
* Default baud rate: 115200
* Default log level: LOG_LEVEL_DEBUG
* @note If USB_UART_RX and USB_UART_TX
* are defined as HAL_PIN_NC, you will
* need to define them manually for log to work.
* See @b LOG_MAP_USB_UART macro definition for detailed explanation.
*/
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
boostinv3_cfg_setup( &boostinv3_cfg );
BOOSTINV3_MAP_MIKROBUS( boostinv3_cfg, MIKROBUS_1 );
if ( I2C_MASTER_ERROR == boostinv3_init( &boostinv3, &boostinv3_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
Delay_ms( 100 );
if ( BOOSTINV3_ERROR == boostinv3_default_cfg ( &boostinv3 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}
void application_task ( void )
{
for ( uint8_t n_cnt = BOOSTINV3_OUT_VOLTAGE_4V; n_cnt <= BOOSTINV3_OUT_VOLTAGE_6V; n_cnt++ )
{
err_t error_flag = boostinv3_set_pos_out( &boostinv3, n_cnt );
error_flag |= boostinv3_set_neg_out( &boostinv3, n_cnt );
if ( BOOSTINV3_OK == error_flag )
{
log_printf( &logger, " Set positive and negative voltage to %.1f V \r\n",
( BOOSTINV3_MIN_VOL_LVL + n_cnt * BOOSTINV3_INCREMENT ) );
}
else
{
log_printf( &logger, " Error has occurred!!! \r\n" );
}
Delay_ms( 5000 );
}
}
void main ( void )
{
application_init( );
for ( ; ; )
{
application_task( );
}
}
// ------------------------------------------------------------------------ END
