Logan Rooper / Mbed 2 deprecated ltc2991_test

I2C not yet integrated

Dependencies:   mbed

Tested working with single and differential voltages.

Connect SCL (pin 11) to D15 Connect SDA (pin 10) to D14 Connect pin 16 to +5v Connect pin 9 to gnd

main.cpp@1:4e4194db7cd6, 2016-11-29 (annotated)

Committer:
lrdawg99
Date:
Tue Nov 29 03:20:35 2016 +0000
Revision:
1:4e4194db7cd6
Parent:
0:1473318f27b6
Child:
2:c9e727dcd00e
Tested working, reads single ended and differential voltages.

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 <stdarg.h>
lrdawg99 0:1473318f27b6 4
lrdawg99 0:1473318f27b6 5 int8_t ack; // 0 == ack, 1 == no ack
lrdawg99 0:1473318f27b6 6 const uint16_t LTC2991_TIMEOUT=1000; //!< Configures the maximum timeout allowed for an LTC2991 read.
lrdawg99 0:1473318f27b6 7 Serial pc(USBTX, USBRX, 9600);
lrdawg99 0:1473318f27b6 8
lrdawg99 1:4e4194db7cd6 9
lrdawg99 1:4e4194db7cd6 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 void setup() {
lrdawg99 1:4e4194db7cd6 15 ack = 0;
lrdawg99 0:1473318f27b6 16 while (true)
lrdawg99 0:1473318f27b6 17 {
lrdawg99 0:1473318f27b6 18 pc.printf("boot\n");
lrdawg99 0:1473318f27b6 19 ack |= LTC2991_register_write(LTC2991_I2C_ADDRESS, LTC2991_CHANNEL_ENABLE_REG, LTC2991_ENABLE_ALL_CHANNELS); //! Enables all channels
lrdawg99 0:1473318f27b6 20 ack |= LTC2991_register_write(LTC2991_I2C_ADDRESS, LTC2991_CONTROL_V1234_REG, 0x00); //! Sets registers to default starting values.
lrdawg99 0:1473318f27b6 21 ack |= LTC2991_register_write(LTC2991_I2C_ADDRESS, LTC2991_CONTROL_V5678_REG, 0x00);
lrdawg99 0:1473318f27b6 22 ack |= LTC2991_register_write(LTC2991_I2C_ADDRESS, LTC2991_CONTROL_PWM_Tinternal_REG, LTC2991_REPEAT_MODE); //! Configures LTC2991 for Repeated Acquisition mode
lrdawg99 1:4e4194db7cd6 23
lrdawg99 0:1473318f27b6 24 if (ack != 0) {
lrdawg99 0:1473318f27b6 25 pc.printf("Error: No Acknowledge. Check I2C Address.\n");
lrdawg99 0:1473318f27b6 26 wait_ms(500);
lrdawg99 0:1473318f27b6 27 } else {
lrdawg99 0:1473318f27b6 28 break;
lrdawg99 0:1473318f27b6 29 }
lrdawg99 0:1473318f27b6 30 }
lrdawg99 0:1473318f27b6 31 }
lrdawg99 0:1473318f27b6 32
lrdawg99 0:1473318f27b6 33 int main() {
lrdawg99 0:1473318f27b6 34 setup();
lrdawg99 0:1473318f27b6 35 while(1) {
lrdawg99 0:1473318f27b6 36 readDiff();
lrdawg99 1:4e4194db7cd6 37 readSingle();
lrdawg99 0:1473318f27b6 38 wait_ms(750);
lrdawg99 0:1473318f27b6 39 }
lrdawg99 0:1473318f27b6 40 }
lrdawg99 0:1473318f27b6 41
lrdawg99 0:1473318f27b6 42 void readSingle() {
lrdawg99 0:1473318f27b6 43 int8_t data_valid;
lrdawg99 0:1473318f27b6 44 int16_t code;
lrdawg99 0:1473318f27b6 45 float voltage;
lrdawg99 1:4e4194db7cd6 46 ack = 0;
lrdawg99 0:1473318f27b6 47 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 48 ack |= LTC2991_adc_read_new_data(LTC2991_I2C_ADDRESS, LTC2991_V1_MSB_REG, &code, &data_valid, LTC2991_TIMEOUT);
lrdawg99 0:1473318f27b6 49 voltage = LTC2991_code_to_single_ended_voltage(code, LTC2991_SINGLE_ENDED_lsb);
lrdawg99 1:4e4194db7cd6 50 if (ack != 0) {
lrdawg99 1:4e4194db7cd6 51 pc.printf("Error: No Acknowledge.\n");
lrdawg99 1:4e4194db7cd6 52 } else {
lrdawg99 1:4e4194db7cd6 53 pc.printf("V1: %4.2f V\n", voltage);
lrdawg99 1:4e4194db7cd6 54 }
lrdawg99 0:1473318f27b6 55 }
lrdawg99 1:4e4194db7cd6 56
lrdawg99 0:1473318f27b6 57 void readDiff() {
lrdawg99 0:1473318f27b6 58 int8_t data_valid;
lrdawg99 0:1473318f27b6 59 int16_t code;
lrdawg99 0:1473318f27b6 60 float voltage;
lrdawg99 1:4e4194db7cd6 61 ack = 0;
lrdawg99 0:1473318f27b6 62 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 63 ack |= LTC2991_adc_read_new_data(LTC2991_I2C_ADDRESS, LTC2991_V2_MSB_REG, &code, &data_valid, LTC2991_TIMEOUT);
lrdawg99 0:1473318f27b6 64 voltage = LTC2991_code_to_differential_voltage(code, LTC2991_DIFFERENTIAL_lsb);
lrdawg99 1:4e4194db7cd6 65 if (ack != 0) {
lrdawg99 1:4e4194db7cd6 66 pc.printf("Error: No Acknowledge.\n");
lrdawg99 1:4e4194db7cd6 67 } else {
lrdawg99 1:4e4194db7cd6 68 pc.printf("V1-V2: %4.2f V\n", voltage, ack);
lrdawg99 1:4e4194db7cd6 69 }
lrdawg99 0:1473318f27b6 70 }