Akash Gaikwad / Mbed OS Hexiware_voltmeter_code_MCP3201_ADC

Hexiware_voltmeter_code_MCP3201_ADC

main.cpp@0:459e9fc6e491, 2017-03-22 (annotated)

Committer:
agaikwad
Date:
Wed Mar 22 01:13:04 2017 +0000
Revision:
0:459e9fc6e491
Hexiware_voltmeter_code_MCP3201_ADC

Who changed what in which revision?

UserRevisionLine numberNew contents of line
agaikwad 0:459e9fc6e491 1 #include "mbed.h"
agaikwad 0:459e9fc6e491 2
agaikwad 0:459e9fc6e491 3 SPI spi(PTC6,PTC7,PTC5); // (MOSI MISO CLK)setup SPI interface on pins PTC5,PTC6,PTC7
agaikwad 0:459e9fc6e491 4
agaikwad 0:459e9fc6e491 5 DigitalOut cs2(PTC3);
agaikwad 0:459e9fc6e491 6
agaikwad 0:459e9fc6e491 7 Serial pc(USBTX, USBRX);
agaikwad 0:459e9fc6e491 8
agaikwad 0:459e9fc6e491 9
agaikwad 0:459e9fc6e491 10
agaikwad 0:459e9fc6e491 11 int main()
agaikwad 0:459e9fc6e491 12 {
agaikwad 0:459e9fc6e491 13 spi.format(8,0);
agaikwad 0:459e9fc6e491 14 spi.frequency(1000000);
agaikwad 0:459e9fc6e491 15 pc.printf("Analog read test from spi.\n");
agaikwad 0:459e9fc6e491 16 while (true)
agaikwad 0:459e9fc6e491 17 {
agaikwad 0:459e9fc6e491 18
agaikwad 0:459e9fc6e491 19 cs2=0;
agaikwad 0:459e9fc6e491 20 int high_byte = spi.write(0);
agaikwad 0:459e9fc6e491 21 int low_byte = spi.write(0);
agaikwad 0:459e9fc6e491 22 cs2=1;
agaikwad 0:459e9fc6e491 23 float x = ((high_byte & 0x1f) << 7) | ((low_byte >> 1));
agaikwad 0:459e9fc6e491 24
agaikwad 0:459e9fc6e491 25 float r= (float)((x*33)/4096); // show value in volts.
agaikwad 0:459e9fc6e491 26
agaikwad 0:459e9fc6e491 27 pc.printf("AD Voltage channel value: %f Volt\r\n", r-16.5);
agaikwad 0:459e9fc6e491 28 pc.printf("Voltage Analog Value: %.2f\n\r",x);
agaikwad 0:459e9fc6e491 29 wait_ms(500);
agaikwad 0:459e9fc6e491 30 }
agaikwad 0:459e9fc6e491 31
agaikwad 0:459e9fc6e491 32
agaikwad 0:459e9fc6e491 33 }
agaikwad 0:459e9fc6e491 34