Brody Kellish / ltc2991_lib

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Dependents:   ece495_firmware

Fork of ltc2991_test by Logan Rooper

main.cpp@0:1473318f27b6, 2016-11-16 (annotated)

Committer:
lrdawg99
Date:
Wed Nov 16 15:54:08 2016 +0000
Revision:
0:1473318f27b6
Child:
1:4e4194db7cd6
Ready to integrate I2C into LT_I2C

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lrdawg99 0:1473318f27b6 1 #include "mbed.h"
lrdawg99 0:1473318f27b6 2 #include "LTC2991.h"
lrdawg99 0:1473318f27b6 3 //#include <Wire.h>
lrdawg99 0:1473318f27b6 4 #include <stdarg.h>
lrdawg99 0:1473318f27b6 5
lrdawg99 0:1473318f27b6 6 int8_t ack; // 0 == ack, 1 == no ack
lrdawg99 0:1473318f27b6 7 const uint16_t LTC2991_TIMEOUT=1000; //!< Configures the maximum timeout allowed for an LTC2991 read.
lrdawg99 0:1473318f27b6 8 Serial pc(USBTX, USBRX, 9600);
lrdawg99 0:1473318f27b6 9
lrdawg99 0:1473318f27b6 10 void setup();
lrdawg99 0:1473318f27b6 11 int main();
lrdawg99 0:1473318f27b6 12 void readSingle();
lrdawg99 0:1473318f27b6 13 void readDiff();
lrdawg99 0:1473318f27b6 14
lrdawg99 0:1473318f27b6 15
lrdawg99 0:1473318f27b6 16 void setup() {
lrdawg99 0:1473318f27b6 17 //Wire.begin();
lrdawg99 0:1473318f27b6 18
lrdawg99 0:1473318f27b6 19 while (true)
lrdawg99 0:1473318f27b6 20 {
lrdawg99 0:1473318f27b6 21 pc.printf("boot\n");
lrdawg99 0:1473318f27b6 22 ack |= LTC2991_register_write(LTC2991_I2C_ADDRESS, LTC2991_CHANNEL_ENABLE_REG, LTC2991_ENABLE_ALL_CHANNELS); //! Enables all channels
lrdawg99 0:1473318f27b6 23 ack |= LTC2991_register_write(LTC2991_I2C_ADDRESS, LTC2991_CONTROL_V1234_REG, 0x00); //! Sets registers to default starting values.
lrdawg99 0:1473318f27b6 24 ack |= LTC2991_register_write(LTC2991_I2C_ADDRESS, LTC2991_CONTROL_V5678_REG, 0x00);
lrdawg99 0:1473318f27b6 25 ack |= LTC2991_register_write(LTC2991_I2C_ADDRESS, LTC2991_CONTROL_PWM_Tinternal_REG, LTC2991_REPEAT_MODE); //! Configures LTC2991 for Repeated Acquisition mode
lrdawg99 0:1473318f27b6 26 if (ack != 0) {
lrdawg99 0:1473318f27b6 27 pc.printf("Error: No Acknowledge. Check I2C Address.\n");
lrdawg99 0:1473318f27b6 28 wait_ms(500);
lrdawg99 0:1473318f27b6 29 } else {
lrdawg99 0:1473318f27b6 30 break;
lrdawg99 0:1473318f27b6 31 }
lrdawg99 0:1473318f27b6 32 }
lrdawg99 0:1473318f27b6 33 }
lrdawg99 0:1473318f27b6 34
lrdawg99 0:1473318f27b6 35 int main() {
lrdawg99 0:1473318f27b6 36 setup();
lrdawg99 0:1473318f27b6 37 while(1) {
lrdawg99 0:1473318f27b6 38 readDiff();
lrdawg99 0:1473318f27b6 39 wait_ms(750);
lrdawg99 0:1473318f27b6 40 }
lrdawg99 0:1473318f27b6 41 }
lrdawg99 0:1473318f27b6 42
lrdawg99 0:1473318f27b6 43 void readSingle() {
lrdawg99 0:1473318f27b6 44 int8_t data_valid;
lrdawg99 0:1473318f27b6 45 int16_t code;
lrdawg99 0:1473318f27b6 46 float voltage;
lrdawg99 0:1473318f27b6 47
lrdawg99 0:1473318f27b6 48 ack |= LTC2991_register_set_clear_bits(LTC2991_I2C_ADDRESS, LTC2991_CONTROL_V1234_REG, 0x00, LTC2991_V1_V2_DIFFERENTIAL_ENABLE | LTC2991_V1_V2_TEMP_ENABLE);
lrdawg99 0:1473318f27b6 49 ack |= LTC2991_adc_read_new_data(LTC2991_I2C_ADDRESS, LTC2991_V1_MSB_REG, &code, &data_valid, LTC2991_TIMEOUT);
lrdawg99 0:1473318f27b6 50 voltage = LTC2991_code_to_single_ended_voltage(code, LTC2991_SINGLE_ENDED_lsb);
lrdawg99 0:1473318f27b6 51 pc.printf("V1: %4.2f V", voltage);
lrdawg99 0:1473318f27b6 52 }
lrdawg99 0:1473318f27b6 53 void readDiff() {
lrdawg99 0:1473318f27b6 54 int8_t data_valid;
lrdawg99 0:1473318f27b6 55 int16_t code;
lrdawg99 0:1473318f27b6 56 float voltage;
lrdawg99 0:1473318f27b6 57
lrdawg99 0:1473318f27b6 58 ack |= LTC2991_register_set_clear_bits(LTC2991_I2C_ADDRESS, LTC2991_CONTROL_V1234_REG, LTC2991_V1_V2_DIFFERENTIAL_ENABLE, LTC2991_V1_V2_TEMP_ENABLE);
lrdawg99 0:1473318f27b6 59 ack |= LTC2991_adc_read_new_data(LTC2991_I2C_ADDRESS, LTC2991_V2_MSB_REG, &code, &data_valid, LTC2991_TIMEOUT);
lrdawg99 0:1473318f27b6 60 voltage = LTC2991_code_to_differential_voltage(code, LTC2991_DIFFERENTIAL_lsb);
lrdawg99 0:1473318f27b6 61 pc.printf("V1-V2: %4.2f V", voltage);
lrdawg99 0:1473318f27b6 62 }