Éric Bisson / Mbed 2 deprecated Code_APP3_R

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Dependencies:   mbed

Fork of Code_APP1 by Louis Beaulieu

main.cpp@4:ffd7cef72270, 2017-01-16 (annotated)

Committer:
LouBe4
Date:
Mon Jan 16 19:19:27 2017 +0000
Revision:
4:ffd7cef72270
Parent:
3:5dcf9b78f3ad
Child:
5:1a60144f7163
Affichage SPI marche;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
LouBe4 0:52fba6f1554b 1 #include "mbed.h"
LouBe4 0:52fba6f1554b 2
LouBe4 3:5dcf9b78f3ad 3 #define PI 3.1416
LouBe4 3:5dcf9b78f3ad 4
LouBe4 0:52fba6f1554b 5 Serial pc(USBTX, USBRX);
LouBe4 0:52fba6f1554b 6 SPI spi(p11, p12, p13);
LouBe4 0:52fba6f1554b 7 DigitalOut cs(p14);
LouBe4 0:52fba6f1554b 8 I2C i2c(p28, p27);
LouBe4 0:52fba6f1554b 9 PwmOut led1(LED1);
LouBe4 0:52fba6f1554b 10 int addrChip = 0x3A;
LouBe4 1:3430643e8ed4 11 char buffer[3];
LouBe4 1:3430643e8ed4 12
LouBe4 3:5dcf9b78f3ad 13 void calculer_angle(char bufferAngle[], int accZ)
LouBe4 1:3430643e8ed4 14 {
LouBe4 3:5dcf9b78f3ad 15 float angle = abs(cos(static_cast<float>(accZ*90/64)*PI/180)*90);
LouBe4 4:ffd7cef72270 16 pc.printf("%f\n", angle);
LouBe4 3:5dcf9b78f3ad 17 int angleInt = (int)(angle*100);
LouBe4 4:ffd7cef72270 18 snprintf(bufferAngle, 5, "%d", angleInt);
LouBe4 3:5dcf9b78f3ad 19
LouBe4 3:5dcf9b78f3ad 20 if(angle < 10)
LouBe4 3:5dcf9b78f3ad 21 {
LouBe4 3:5dcf9b78f3ad 22 bufferAngle[3] = bufferAngle[2];
LouBe4 3:5dcf9b78f3ad 23 bufferAngle[2] = bufferAngle[1];
LouBe4 3:5dcf9b78f3ad 24 bufferAngle[1] = bufferAngle[0];
LouBe4 3:5dcf9b78f3ad 25 bufferAngle[0] = '0';
LouBe4 3:5dcf9b78f3ad 26 }
LouBe4 4:ffd7cef72270 27 pc.printf("%c", bufferAngle[0]);
LouBe4 4:ffd7cef72270 28 pc.printf("%c", bufferAngle[1]);
LouBe4 4:ffd7cef72270 29 pc.printf("%c", bufferAngle[2]);
LouBe4 4:ffd7cef72270 30 pc.printf("%c", bufferAngle[3]);
LouBe4 4:ffd7cef72270 31 pc.printf("\n");
LouBe4 4:ffd7cef72270 32
LouBe4 1:3430643e8ed4 33 }
LouBe4 0:52fba6f1554b 34
LouBe4 0:52fba6f1554b 35 int main() {
LouBe4 0:52fba6f1554b 36 spi.format(8,0);
LouBe4 0:52fba6f1554b 37 spi.frequency(250000);
LouBe4 3:5dcf9b78f3ad 38 while(1)
LouBe4 3:5dcf9b78f3ad 39 {
LouBe4 3:5dcf9b78f3ad 40 //Activer l'accéléromètre pour lecture 8 bits
LouBe4 3:5dcf9b78f3ad 41 char activation[2] = {0x2A, 0x03};
LouBe4 3:5dcf9b78f3ad 42 char fullScale[2] = {0x0E, 0x00};
LouBe4 3:5dcf9b78f3ad 43 char resultat[5] = {0};
LouBe4 3:5dcf9b78f3ad 44 i2c.write(addrChip, activation, 2, true);
LouBe4 3:5dcf9b78f3ad 45 i2c.write(addrChip, fullScale, 2, true);
LouBe4 3:5dcf9b78f3ad 46
LouBe4 3:5dcf9b78f3ad 47 //Aller lire les valeurs d'accélération
LouBe4 3:5dcf9b78f3ad 48 buffer[0] = 0x01;
LouBe4 3:5dcf9b78f3ad 49 i2c.write(addrChip, buffer, 1, true);
LouBe4 3:5dcf9b78f3ad 50 i2c.read(addrChip, buffer, 3);
LouBe4 3:5dcf9b78f3ad 51 calculer_angle(resultat, buffer[2]);
LouBe4 3:5dcf9b78f3ad 52
LouBe4 3:5dcf9b78f3ad 53 cs = 0;
LouBe4 3:5dcf9b78f3ad 54 wait_us(25);
LouBe4 3:5dcf9b78f3ad 55 spi.write(0x77);
LouBe4 3:5dcf9b78f3ad 56 spi.write(0b00000010);
LouBe4 3:5dcf9b78f3ad 57 wait_us(100);
LouBe4 3:5dcf9b78f3ad 58 spi.write(resultat[0]);
LouBe4 3:5dcf9b78f3ad 59 spi.write(resultat[1]);
LouBe4 4:ffd7cef72270 60 spi.write(resultat[2]);
LouBe4 3:5dcf9b78f3ad 61 spi.write(resultat[3]);
LouBe4 3:5dcf9b78f3ad 62 wait_us(25);
LouBe4 3:5dcf9b78f3ad 63 cs = 1;
LouBe4 3:5dcf9b78f3ad 64 wait(0.25);
LouBe4 3:5dcf9b78f3ad 65 }
LouBe4 0:52fba6f1554b 66 }