MSP-EXP430F5529 & CCS: Read and show ADC voltage

MrChunckuee agosto 05, 2019
In this publication we will see another example of the 12-bit ADC, we will use the potentiometer of this board, on the screen we will show the ADC bits and the corresponding voltage.

Firmware:
The first task was to get a function to move from floating to array, i used the InDevice version, I have added those functions to a couple of files, called special.h and special.c, that will be where you have some common functions for MSPs and it is easier to add them to our projects.

The code that makes this possible:
/*******************************************************************************
*
* MSP-EXP430F5529_005: Leer y mostrar el voltaje del ADC
*
*******************************************************************************
* FileName: main.c
* Processor: MSP430F5529
* Complier: CCS 7.2.0.00013
* Author: Pedro Sánchez Ramírez (MrChunckuee)
* Blog: http://mrchunckuee.blogspot.com/
* Email: mrchunckuee.psr@gmail.com
* Description: Pequeño ejemplo para mostrar el numero de bits y el voltaje
* presentes en el ADC.
*******************************************************************************
* Rev. Date Comment
* v0.01 10/10/2017 - Creación del firmware
******************************************************************************/
#include <msp430.h>
#include <stdlib.h>
#include "HAL_Dogs102x6.h"
#include "special.h"
static const uint8_t mrchunckueeLogo[] = {
0x66, // Image width in pixels (102 pixels)
0x08, // Image height in rows (1 row = 8 pixels)
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x01 , 0x03 , 0x01 , 0x08 , 0x1C,
0x3E , 0x7F , 0x3F , 0x1F , 0x0F , 0x06 , 0x00 , 0x01,
0x03 , 0x01 , 0x06 , 0x0E , 0x1F , 0x3F , 0x7F , 0x3F,
0x1E , 0x0C , 0x00 , 0x01 , 0x01 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x03 , 0x07 , 0x0F , 0x0F , 0x07 , 0x63,
0xF1 , 0xF8 , 0xFC , 0xFE , 0xFC , 0x79 , 0x33 , 0x07,
0x8F , 0x9F , 0x3F , 0x7F , 0xFF , 0xFF , 0xFF , 0xFF,
0xFF , 0x7F , 0x3F , 0x9F , 0x8F , 0x17 , 0x33 , 0x79,
0xFC , 0xFE , 0xFC , 0xF9 , 0x73 , 0x27 , 0x0F , 0x0F,
0x07 , 0x03 , 0x01 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x01,
0x03 , 0x01 , 0x08 , 0x1C , 0x3E , 0x7F , 0x7F , 0x3F,
0x1F , 0x8E , 0xC4 , 0xF1 , 0xF3 , 0xE7 , 0xCF , 0x9F,
0x3F , 0x7F , 0xFF , 0xFF , 0xFF , 0xFF , 0xFF , 0xFF,
0xFF , 0xFF , 0xFF , 0xFF , 0xFF , 0xFF , 0xFF , 0xFF,
0xFF , 0xFF , 0xFF , 0xFF , 0xFF , 0xFF , 0xFF , 0x7F,
0x3F , 0x9F , 0xCF , 0xE7 , 0xF3 , 0xE1 , 0xC4 , 0x8E,
0x1F , 0x3F , 0x7F , 0x3F , 0x1E , 0x0C , 0x01 , 0x03,
0x01 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x60 , 0xF0 , 0xF8 , 0xFC , 0xFC,
0xFC , 0x79 , 0x33 , 0x07 , 0x8F , 0x9F , 0x2F , 0x60,
0xE0 , 0xE0 , 0xE0 , 0xE0 , 0xEF , 0xEC , 0xE7 , 0xE3,
0xE1 , 0xE0 , 0xFF , 0xFF , 0xFE , 0xFE , 0xF0 , 0xE0,
0xE6 , 0xE6 , 0xE0 , 0xE0 , 0xE3 , 0xFE , 0xFC , 0xFC,
0xFC , 0xFF , 0xEF , 0xEF , 0xE0 , 0xE0 , 0xE0 , 0xE0,
0xE7 , 0xE7 , 0xE0 , 0xE0 , 0xE0 , 0x60 , 0x31 , 0x9F,
0x8F , 0x37 , 0x73 , 0xF9 , 0xFC , 0xFC , 0xF8 , 0xF0,
0x60 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x03 , 0x07 , 0x0F , 0x1F , 0x3F , 0x9F , 0xCF,
0xE6 , 0xF0 , 0xF8 , 0xF8 , 0xF2 , 0x03 , 0x03 , 0x03,
0x03 , 0x03 , 0x7B , 0x13 , 0xF3 , 0xE3 , 0xC3 , 0x83,
0xFF , 0x0F , 0x07 , 0x03 , 0x03 , 0x63 , 0x63 , 0x67,
0x0F , 0x1F , 0x0F , 0x07 , 0x43 , 0xE3 , 0xE7 , 0xCF,
0xFB , 0xFB , 0x03 , 0x03 , 0x03 , 0x03 , 0x1B , 0x1F,
0x0F , 0x07 , 0x03 , 0x82 , 0xC0 , 0xE1 , 0xF0 , 0xE4,
0xCE , 0x9F , 0x3F , 0x1F , 0x0F , 0x07 , 0x03 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x80 , 0xC0 , 0xE0 , 0xC0 , 0x88 , 0x1C , 0x3E , 0x7F,
0xFF , 0xFE , 0x7C , 0x39 , 0x93 , 0xC7 , 0xE7 , 0xF3,
0xF9 , 0xFC , 0xFE , 0xFF , 0xFF , 0xFF , 0xFF , 0xFF,
0xFF , 0xFF , 0xFF , 0xFF , 0xFF , 0xFF , 0xFF , 0xFF,
0xFF , 0xFF , 0xFF , 0xFF , 0xFF , 0xFF , 0xFF , 0xFF,
0xFF , 0xFE , 0xFC , 0xF9 , 0xF3 , 0xE7 , 0xC7 , 0x83,
0x31 , 0x78 , 0xFC , 0xFE , 0xFF , 0x7E , 0x3C , 0x18,
0x80 , 0xC0 , 0xC0 , 0x80 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0xE0 , 0xF0 , 0xF8 , 0xF8 , 0xF0 , 0xE3 , 0xC7 , 0x8F,
0x1F , 0x3F , 0x9F , 0xCF , 0xE6 , 0xF0 , 0xF9 , 0xFC,
0xFE , 0xFF , 0xFF , 0xFF , 0xFF , 0xFF , 0xFF , 0xFE,
0xFC , 0xF9 , 0xF0 , 0xE4 , 0xCE , 0x9F , 0x3F , 0x3F,
0x1F , 0x8F , 0xC7 , 0xE2 , 0xF8 , 0xF8 , 0xF0 , 0xE0,
0x40 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x80 , 0xC0 , 0xC0 , 0xC0,
0x98 , 0x3C , 0x7E , 0xFE , 0xFE , 0xFC , 0x78 , 0x30,
0x80 , 0xC0 , 0xC0 , 0x80 , 0x30 , 0x78 , 0xFC , 0xFE,
0xFE , 0x7E , 0x3C , 0x18 , 0x80 , 0xC0 , 0xC0 , 0x80,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00,
0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00
};
char adcValueLCD[20], adcVoltsLCD[20];
int adcValue = 0;
double adcVolts = 0;
/********** P R O T O T Y P E S *************/
void MCU_Init(void);
void MCU_Delayms(int16_t time);
void ADC_Init(void);
int16_t ADC_Get(void);
/**
* main.c
*/
void main(void){
MCU_Init();
// Display MrChunckuee Logo
// and welcome message
Dogs102x6_imageDraw(mrchunckueeLogo, 0, 0);
MCU_Delayms(2000);
Dogs102x6_clearScreen();
Dogs102x6_stringDraw(1, 0, " MSP-EXP430F5529 ", DOGS102x6_DRAW_NORMAL);
Dogs102x6_stringDraw(3, 0, " Welcome!! ", DOGS102x6_DRAW_NORMAL);
Dogs102x6_stringDraw(4, 0, " @MrChunckuee ", DOGS102x6_DRAW_NORMAL);
Dogs102x6_stringDraw(6, 0, "http://e2e.ti.com", DOGS102x6_DRAW_NORMAL);
MCU_Delayms(2000);
Dogs102x6_clearScreen();
// Main loop
while (1){
P1OUT ^= BIT0; // XOR P1.0
adcValue = ADC_Get();
SPECIAL_ltoa(adcValue, adcValueLCD);
adcVolts = adcValue*(3.6/4096.0);
SPECIAL_ftoa(adcVolts, 2, adcVoltsLCD);
Dogs102x6_stringDraw(0, 0, " MSP-EXP430F5529 ", DOGS102x6_DRAW_NORMAL);
Dogs102x6_stringDraw(2, 0, " ADC Value: ", DOGS102x6_DRAW_NORMAL);
Dogs102x6_stringDraw(4, 0, " ADC Volts: ", DOGS102x6_DRAW_NORMAL);
Dogs102x6_stringDraw(2, 66, &adcValueLCD[0], DOGS102x6_DRAW_NORMAL);
Dogs102x6_stringDraw(4, 66, &adcVoltsLCD[0], DOGS102x6_DRAW_NORMAL);
MCU_Delayms(500);
}
}
void MCU_Init(void){
WDTCTL = WDTPW | WDTHOLD; // stop watchdog timer
// Basic GPIO initialization
// Configure Dogs102x6 ports
P5OUT &= ~(BIT6 + BIT7); // LCD_C/D, LCD_RST
P5DIR |= BIT6 + BIT7;
P7OUT &= ~(BIT4 + BIT6); // LCD_CS, LCD_BL_EN
P7DIR |= BIT4 + BIT6;
P4OUT &= ~(BIT1 + BIT3); // SIMO, SCK
P4DIR &= ~BIT2; // SOMI pin is input
P4DIR |= BIT1 + BIT3;
//General GPIOs initialization
P1DIR |= BIT0; // P1.0 output
P1OUT &= ~BIT0; //Clear LED1
// Set up LCD
Dogs102x6_init();
Dogs102x6_backlightInit();
Dogs102x6_setBacklight(11);
Dogs102x6_setContrast(11);
Dogs102x6_clearScreen();
// ADC Init
ADC_Init();
}
void MCU_Delayms(int16_t time){
int16_t delayCount;
for (delayCount=0; delayCount<time; ++delayCount)
__delay_cycles(1000); // 1ms = 1000 clocks at 1MHz
return;
}
void ADC_Init(void){
ADC12CTL0 = ADC12SHT02 + ADC12ON; // Sampling time, ADC12 on
ADC12CTL1 = ADC12SHP; // Use sampling timer
ADC12MCTL0 = ADC12INCH_5; // Use A5 (wheel) as input
ADC12CTL0 |= ADC12ENC; // Enable conversions
P6SEL |= BIT5; // P6.5 ADC option select (A5)
P8DIR |= BIT0; // P8.0 output
P8OUT |= BIT0; // Set P8.0 high
}
int16_t ADC_Get(void){
ADC12CTL0 |= ADC12SC; // Iniciamos la lectura
while (ADC12CTL0 & BUSY); // Espero mientras hace la lectura
return ADC12MEM0; // Regresa el valor leido
}
view raw MSP-EXP430F5529_005: main.c hosted with ❤ by GitHub

Here is a photo showing the voltage measured with a multimeter:


Video:
Here a small video of the working temperature sensor.


Download:
Here the direct link to DOWNLOAD the available files, you can also check or download the information from my repository on GitHub, if you do not know how to download it you can check here, well for now it's all, if you have doubts, comments, suggestions, concerns, etc. leave them and I will try to answer as soon as possible.


Donations:
If you like the content or if the resources are useful to you, share the link on your social networks or sites where you think it may be of interest, you can also help me with a donation to continue making publications and improve the content of the site. You can also donate in kind, for example components, development boards or tools. Contact me to talk or you can become one of our sponsors.


I ask for feedback notifying each time a link does not work or has errors when opening it, as well as if an image is not visible or does not load, to correct it in the shortest possible time.


Bibliography:
MrChunckuee

Publicado por MrChunckuee

Amo armar, desarmar y/o destruir cosas en donde la electrónica y los componentes estén involucrados, me gusta la robótica y los microcontroladores, de ahí el nombre de mi blog, el cual surge por la pasión que tengo sobre estos temas: La Electrónica que es mi carrera y la Robótica que es uno de mis hobbies favoritos, siempre he dicho "Casado con la electrónica, pero amante de la robótica".

Publicar un comentario

0 Comentarios