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MAX14662.cpp
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/**
*
* ESP32 driver for the MAX14662 8-channel I2C switch / multiplexer
*
* For use with the ESP-IDF build framework; the I2C communication
* is handled by the i2c_manager component.
*
* @author Jakub Prikner <jakub.prikner@gmail.com>
* https://www.prikner.net
*
*/
// ====================================================================
#include "MAX14662.h"
static const char *TAG = "MAX14662" ;
// ====================================================================
MAX14662::MAX14662 ( i2c_port_t port, uint8_t address ) : port (port), address (address)
{
}
// --------------------------------------------------------------------
MAX14662::~MAX14662 ()
{
}
// --------------------------------------------------------------------
void MAX14662::init ()
{
ESP_LOGI ( TAG, "Init --- I2C port: %d, address: 0x%X", port, address ) ;
openAll () ;
}
// --------------------------------------------------------------------
esp_err_t MAX14662::openSwitch ( uint8_t switchNr )
{
uint8_t currentState = getAllSwitches () ;
currentState &= ~( 1 << switchNr ) ;
esp_err_t ret = i2c_manager_write ( port, address, MAX14662_DIR0, ¤tState, 1 ) ;
if ( ret != ESP_OK ) ESP_LOGE ( TAG, "Error opening switch #%d", switchNr ) ;
return ret ;
}
// --------------------------------------------------------------------
esp_err_t MAX14662::closeSwitch ( uint8_t switchNr )
{
uint8_t currentState = getAllSwitches () ;
currentState |= ( 1 << switchNr ) ;
esp_err_t ret = i2c_manager_write ( port, address, MAX14662_DIR0, ¤tState, 1 ) ;
if ( ret != ESP_OK ) ESP_LOGE ( TAG, "Error closing switch #%d", switchNr ) ;
return ret ;
}
// --------------------------------------------------------------------
esp_err_t MAX14662::toggleSwitch ( uint8_t switchNr )
{
uint8_t currentState = getAllSwitches () ;
currentState ^= ( 1 << switchNr ) ;
esp_err_t ret = i2c_manager_write ( port, address, MAX14662_DIR0, ¤tState, 1 ) ;
if ( ret != ESP_OK ) ESP_LOGE ( TAG, "Error toggling switch #%d", switchNr ) ;
return ret ;
}
// --------------------------------------------------------------------
esp_err_t MAX14662::openAll ()
{
uint8_t state = MAX14662_STATE_OPEN_ALL ;
esp_err_t ret = i2c_manager_write ( port, address, MAX14662_DIR0, &state, 1 ) ;
if ( ret != ESP_OK ) ESP_LOGE ( TAG, "Error opening all the switches!" ) ;
return ret ;
}
// --------------------------------------------------------------------
esp_err_t MAX14662::closeAll ()
{
uint8_t state = MAX14662_STATE_CLOSE_ALL ;
esp_err_t ret = i2c_manager_write ( port, address, MAX14662_DIR0, &state, 1 ) ;
if ( ret != ESP_OK ) ESP_LOGE ( TAG, "Error closing all the switches!" ) ;
return ret ;
}
// --------------------------------------------------------------------
esp_err_t MAX14662::setSwitches ( uint8_t mask )
{
esp_err_t ret = i2c_manager_write ( port, address, MAX14662_DIR0, &mask, 1 ) ;
if ( ret != ESP_OK ) ESP_LOGE ( TAG, "Error setting bit mask!" ) ;
return ret ;
}
// --------------------------------------------------------------------
uint8_t MAX14662::getAllSwitches ()
{
uint8_t data = 0x00 ;
esp_err_t ret = i2c_manager_read ( port, address, MAX14662_DIR0, &data, 1 ) ;
// printf ( "MAX14662 register data: %d\n", *data ) ;
if ( ret != ESP_OK )
{
ESP_LOGE ( TAG, "Error reading MAX14662 register!" ) ;
return -1 ;
}
return data ;
}