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Charger 17 Click is a compact add-on board that provides a single-cell battery charging solution. This board features the RT9471, a 3A single-cell switching battery charger from Richtek. It is a highly-integrated battery charge and system power-path management device for single-cell Li-Ion and Li-Polymer batteries. The high-efficiency 1.5MHz synchronous switch-mode buck charger achieves up to 92% charge efficiency at 2A with 5V input and 3.8V battery.
- Author : Stefan Filipovic
- Date : Aug 2022.
- Type : I2C type
We provide a library for the Charger 17 Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.
Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.
This library contains API for Charger 17 Click driver.
charger17_cfg_setup
Config Object Initialization function.
void charger17_cfg_setup ( charger17_cfg_t *cfg );
charger17_init
Initialization function.
err_t charger17_init ( charger17_t *ctx, charger17_cfg_t *cfg );
charger17_default_cfg
Click Default Configuration function.
err_t charger17_default_cfg ( charger17_t *ctx );
charger17_enable_charging
This function enables charging by setting the CE pin to low logic state.
void charger17_enable_charging ( charger17_t *ctx );
charger17_set_psel_2400mA
This function sets charging current to 2400mA by setting the PSEL pin to low logic state.
void charger17_set_psel_2400mA ( charger17_t *ctx );
charger17_read_register
This function reads data from the selected register by using I2C serial interface.
err_t charger17_read_register ( charger17_t *ctx, uint8_t reg, uint8_t *data_out );
This example demonstrates the use of Charger 17 click board by enabling battery charging and displaying the charging status.
The demo application is composed of two sections :
Initializes the driver and performs the click default configuration which enables charging.
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
charger17_cfg_t charger17_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.
charger17_cfg_setup( &charger17_cfg );
CHARGER17_MAP_MIKROBUS( charger17_cfg, MIKROBUS_1 );
if ( I2C_MASTER_ERROR == charger17_init( &charger17, &charger17_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( CHARGER17_ERROR == charger17_default_cfg ( &charger17 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}
Reads and displays the battery charging status (IC_STATUS and STAT0 regs) on the USB UART approximately once per second.
void application_task ( void )
{
uint8_t ic_status, status_0;
if ( CHARGER17_OK == charger17_read_register ( &charger17, CHARGER17_REG_IC_STATUS, &ic_status ) )
{
charger17_parse_ic_status ( ic_status );
}
if ( CHARGER17_OK == charger17_read_register ( &charger17, CHARGER17_REG_STAT0, &status_0 ) )
{
charger17_parse_status_0 ( status_0 );
}
Delay_ms ( 1000 );
}
The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.
Other Mikroe Libraries used in the example:
- MikroSDK.Board
- MikroSDK.Log
- Click.Charger17
Additional notes and informations
Depending on the development board you are using, you may need USB UART click, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroElektronika compilers.