Bridge the gap between the digital and analog world with DAC80501 and PIC18F57Q43
Craft your analog path with DAC innovation
Published Feb 13, 2024
Click board™
DAC 9 Click
Dev. board
Curiosity Nano with PIC18F57Q43
Compiler
NECTO Studio
MCU
PIC18F57Q43
By translating binary codes into voltage levels, this solution amplifies data's voice, enabling systems to interpret, respond to, and leverage digital insights for various applications
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Hardware Overview
How does it work?
DAC 9 Click is based on the DAC80501, a single-channel, buffered, 16-bit resolution digital-to-analog converter from Texas Instruments. It includes a 2.5V, 5ppm/˚C internal reference, giving full-scale output voltage ranges of 1.25V, 2.5V, or 5V, and incorporates a Power-On Reset function. This function makes sure that the DAC80501 output powers up at zero scale or midscale and remains at that scale until a valid code is written to the device. High resolution and simple interface features make this Click board™ suitable for applications such as battery testers, communications equipment, factory automation, control, test and measurement, and more. The output channel, which DAC80501 routed to the VOUT terminal, consists of a rail-to-rail ladder
architecture with an output buffer amplifier that generates rail-to-rail voltages, giving a maximum output range of 0V to VDD. The full-scale output range of the DAC output is determined by the reference voltage on the VREFIO pin, the reference divider setting, and the gain configuration for that channel set by the corresponding BUFF-GAIN bit. When the DAC80501 uses an internal reference, this voltage is externally available at the VREF terminal and can source up to 5mA. Besides, the user can bring the external reference voltage on this terminal in the case of the DAC80501 external reference configuration. DAC 9 Click provides the possibility of using both I2C and SPI interfaces. The selection can be performed by positioning SMD jumpers labeled COMM SEL to an appropriate
position. Note that all jumpers must be placed on the same side, or the Click board™ may become unresponsive. In SPI mode, the DAC80501 uses a 3-Wire SPI serial interface that operates at clock rates of up to 50MHz, while in I2C mode, the DAC80501 can operate in Standard Mode (100 kbps), Fast Mode (400 kbps) and Fast-Plus Mode (1.0 Mbps). 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, as a reference, for further development.
Features overview
Development board
PIC18F57Q43 Curiosity Nano evaluation kit is a cutting-edge hardware platform designed to evaluate microcontrollers within the PIC18-Q43 family. Central to its design is the inclusion of the powerful PIC18F57Q43 microcontroller (MCU), offering advanced functionalities and robust performance. Key features of this evaluation kit include a yellow user LED and a responsive
mechanical user switch, providing seamless interaction and testing. The provision for a 32.768kHz crystal footprint ensures precision timing capabilities. With an onboard debugger boasting a green power and status LED, programming and debugging become intuitive and efficient. Further enhancing its utility is the Virtual serial port (CDC) and a debug GPIO channel (DGI
GPIO), offering extensive connectivity options. Powered via USB, this kit boasts an adjustable target voltage feature facilitated by the MIC5353 LDO regulator, ensuring stable operation with an output voltage ranging from 1.8V to 5.1V, with a maximum output current of 500mA, subject to ambient temperature and voltage constraints.
Microcontroller Overview
MCU Card / MCU
Architecture
PIC
MCU Memory (KB)
128
Silicon Vendor
Microchip
Pin count
48
RAM (Bytes)
8196
You complete me!
Accessories
Curiosity Nano Base for Click boards is a versatile hardware extension platform created to streamline the integration between Curiosity Nano kits and extension boards, tailored explicitly for the mikroBUS™-standardized Click boards and Xplained Pro extension boards. This innovative base board (shield) offers seamless connectivity and expansion possibilities, simplifying experimentation and development. Key features include USB power compatibility from the Curiosity Nano kit, alongside an alternative external power input option for enhanced flexibility. The onboard Li-Ion/LiPo charger and management circuit ensure smooth operation for battery-powered applications, simplifying usage and management. Moreover, the base incorporates a fixed 3.3V PSU dedicated to target and mikroBUS™ power rails, alongside a fixed 5.0V boost converter catering to 5V power rails of mikroBUS™ sockets, providing stable power delivery for various connected devices.
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Click board™ Schematic
Step by step
Project assembly
Start by selecting your development board and Click board™. Begin with the Curiosity Nano with PIC18F57Q43 as your development board.
Track your results in real time
Application Output
1. Application Output - In Debug mode, the 'Application Output' window enables real-time data monitoring, offering direct insight into execution results. Ensure proper data display by configuring the environment correctly using the provided tutorial.
2. UART Terminal - Use the UART Terminal to monitor data transmission via a USB to UART converter, allowing direct communication between the Click board™ and your development system. Configure the baud rate and other serial settings according to your project's requirements to ensure proper functionality. For step-by-step setup instructions, refer to the provided tutorial.
3. Plot Output - The Plot feature offers a powerful way to visualize real-time sensor data, enabling trend analysis, debugging, and comparison of multiple data points. To set it up correctly, follow the provided tutorial, which includes a step-by-step example of using the Plot feature to display Click board™ readings. To use the Plot feature in your code, use the function: plot(*insert_graph_name*, variable_name);. This is a general format, and it is up to the user to replace 'insert_graph_name' with the actual graph name and 'variable_name' with the parameter to be displayed.
Software Support
Library Description
This library contains API for DAC 9 Click driver.
Key functions:
dac9_set_config- Set config functiondac9_set_gain- Set gain functiondac9_set_vout- Set Vout function
Open Source
Code example
The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.
/*!
* @file main.c
* @brief DAC9 Click example
*
* # Description
* This is an example that demonstrates the use of the DAC 9 Click board.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initalizes SPI or I2C driver and applies default settings.
*
* ## Application Task
* Demonstrates use of DAC 9 click board by changing output values every two seconds.
*
* @author Stefan Ilic
*
*/
#include "board.h"
#include "log.h"
#include "dac9.h"
static dac9_t dac9;
static log_t logger;
static uint16_t res = 2500;
void application_init ( void ) {
log_cfg_t log_cfg; /**< Logger config object. */
dac9_cfg_t dac9_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.
dac9_cfg_setup( &dac9_cfg );
DAC9_MAP_MIKROBUS( dac9_cfg, MIKROBUS_1 );
err_t init_flag = dac9_init( &dac9, &dac9_cfg );
if ( ( I2C_MASTER_ERROR == init_flag ) || ( SPI_MASTER_ERROR == init_flag ) ) {
log_error( &logger, " Application Init Error. " );
log_info( &logger, " Please, run program again... " );
for ( ; ; );
}
log_printf( &logger, "---------------------\r\n" );
log_printf( &logger, " Soft reset \r\n" );
dac9_soft_reset( &dac9 );
Delay_ms( 200 );
log_printf( &logger, "---------------------\r\n" );
log_printf( &logger, " Vref divided by 2 \r\n" );
log_printf( &logger, " Set DAC gain of 2 \r\n" );
dac9_set_gain( &dac9, DAC9_GAIN_REF_DIV_2, DAC9_GAIN_BUFF_GAIN_2 );
Delay_ms( 100 );
log_printf( &logger, "---------------------\r\n" );
log_info( &logger, " Application Task " );
}
void application_task ( void ) {
uint16_t n_cnt;
for ( n_cnt = 0; n_cnt <= res; n_cnt += 500 ) {
log_printf( &logger, "Output Voltage : %d mV\r\n", ( uint16_t ) n_cnt );
dac9_set_vout( &dac9, n_cnt );
Delay_ms( 2000 );
}
}
void main ( void ) {
application_init( );
for ( ; ; ) {
application_task( );
}
}
// ------------------------------------------------------------------------ END
