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@2:c9e727dcd00e, 2016-12-06 (annotated)

Committer:
lrdawg99
Date:
Tue Dec 06 18:34:46 2016 +0000
Revision:
2:c9e727dcd00e
Parent:
1:4e4194db7cd6
Child:
3:34e56211d5b6
made object oriented

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 2:c9e727dcd00e 9 LTC2991 *ltc0 = new LTC2991(I2C_SDA, I2C_SCL);
lrdawg99 2:c9e727dcd00e 10 LTC2991 *ltc1 = new LTC2991(PB_3, PB_10);
lrdawg99 2:c9e727dcd00e 11 LTC2991 *ltc2 = new LTC2991(PB_4, PA_8);
lrdawg99 2:c9e727dcd00e 12
lrdawg99 1:4e4194db7cd6 13
lrdawg99 1:4e4194db7cd6 14 //void setup();
lrdawg99 0:1473318f27b6 15 int main();
lrdawg99 0:1473318f27b6 16 void readSingle();
lrdawg99 0:1473318f27b6 17 void readDiff();
lrdawg99 0:1473318f27b6 18 void setup() {
lrdawg99 2:c9e727dcd00e 19 //init lib
lrdawg99 2:c9e727dcd00e 20
lrdawg99 2:c9e727dcd00e 21
lrdawg99 1:4e4194db7cd6 22 ack = 0;
lrdawg99 0:1473318f27b6 23 while (true)
lrdawg99 0:1473318f27b6 24 {
lrdawg99 0:1473318f27b6 25 pc.printf("boot\n");
lrdawg99 2:c9e727dcd00e 26 ack |= ltc0->LTC2991_register_write(LTC2991_I2C_ADDRESS, LTC2991_CHANNEL_ENABLE_REG, LTC2991_ENABLE_ALL_CHANNELS); //! Enables all channels
lrdawg99 2:c9e727dcd00e 27 ack |= ltc0->LTC2991_register_write(LTC2991_I2C_ADDRESS, LTC2991_CONTROL_V1234_REG, 0x00); //! Sets registers to default starting values.
lrdawg99 2:c9e727dcd00e 28 ack |= ltc0->LTC2991_register_write(LTC2991_I2C_ADDRESS, LTC2991_CONTROL_V5678_REG, 0x00);
lrdawg99 2:c9e727dcd00e 29 ack |= ltc0->LTC2991_register_write(LTC2991_I2C_ADDRESS, LTC2991_CONTROL_PWM_Tinternal_REG, LTC2991_REPEAT_MODE); //! Configures LTC2991 for Repeated Acquisition mode
lrdawg99 1:4e4194db7cd6 30
lrdawg99 0:1473318f27b6 31 if (ack != 0) {
lrdawg99 0:1473318f27b6 32 pc.printf("Error: No Acknowledge. Check I2C Address.\n");
lrdawg99 0:1473318f27b6 33 wait_ms(500);
lrdawg99 0:1473318f27b6 34 } else {
lrdawg99 0:1473318f27b6 35 break;
lrdawg99 0:1473318f27b6 36 }
lrdawg99 0:1473318f27b6 37 }
lrdawg99 0:1473318f27b6 38 }
lrdawg99 0:1473318f27b6 39
lrdawg99 0:1473318f27b6 40 int main() {
lrdawg99 0:1473318f27b6 41 setup();
lrdawg99 0:1473318f27b6 42 while(1) {
lrdawg99 0:1473318f27b6 43 readDiff();
lrdawg99 1:4e4194db7cd6 44 readSingle();
lrdawg99 0:1473318f27b6 45 wait_ms(750);
lrdawg99 0:1473318f27b6 46 }
lrdawg99 0:1473318f27b6 47 }
lrdawg99 0:1473318f27b6 48
lrdawg99 0:1473318f27b6 49 void readSingle() {
lrdawg99 0:1473318f27b6 50 int8_t data_valid;
lrdawg99 0:1473318f27b6 51 int16_t code;
lrdawg99 0:1473318f27b6 52 float voltage;
lrdawg99 1:4e4194db7cd6 53 ack = 0;
lrdawg99 2:c9e727dcd00e 54 ack |= ltc0->LTC2991_register_set_clear_bits(LTC2991_I2C_ADDRESS, LTC2991_CONTROL_V1234_REG, 0x00, LTC2991_V1_V2_DIFFERENTIAL_ENABLE | LTC2991_V1_V2_TEMP_ENABLE);
lrdawg99 2:c9e727dcd00e 55 ack |= ltc0->LTC2991_adc_read_new_data(LTC2991_I2C_ADDRESS, LTC2991_V1_MSB_REG, &code, &data_valid, LTC2991_TIMEOUT);
lrdawg99 2:c9e727dcd00e 56 voltage = ltc0->LTC2991_code_to_single_ended_voltage(code, LTC2991_SINGLE_ENDED_lsb);
lrdawg99 1:4e4194db7cd6 57 if (ack != 0) {
lrdawg99 1:4e4194db7cd6 58 pc.printf("Error: No Acknowledge.\n");
lrdawg99 1:4e4194db7cd6 59 } else {
lrdawg99 1:4e4194db7cd6 60 pc.printf("V1: %4.2f V\n", voltage);
lrdawg99 1:4e4194db7cd6 61 }
lrdawg99 0:1473318f27b6 62 }
lrdawg99 1:4e4194db7cd6 63
lrdawg99 0:1473318f27b6 64 void readDiff() {
lrdawg99 0:1473318f27b6 65 int8_t data_valid;
lrdawg99 0:1473318f27b6 66 int16_t code;
lrdawg99 0:1473318f27b6 67 float voltage;
lrdawg99 1:4e4194db7cd6 68 ack = 0;
lrdawg99 2:c9e727dcd00e 69 ack |= ltc0->LTC2991_register_set_clear_bits(LTC2991_I2C_ADDRESS, LTC2991_CONTROL_V1234_REG, LTC2991_V1_V2_DIFFERENTIAL_ENABLE, LTC2991_V1_V2_TEMP_ENABLE);
lrdawg99 2:c9e727dcd00e 70 ack |= ltc0->LTC2991_adc_read_new_data(LTC2991_I2C_ADDRESS, LTC2991_V2_MSB_REG, &code, &data_valid, LTC2991_TIMEOUT);
lrdawg99 2:c9e727dcd00e 71 voltage = ltc0->LTC2991_code_to_differential_voltage(code, LTC2991_DIFFERENTIAL_lsb);
lrdawg99 1:4e4194db7cd6 72 if (ack != 0) {
lrdawg99 1:4e4194db7cd6 73 pc.printf("Error: No Acknowledge.\n");
lrdawg99 1:4e4194db7cd6 74 } else {
lrdawg99 1:4e4194db7cd6 75 pc.printf("V1-V2: %4.2f V\n", voltage, ack);
lrdawg99 1:4e4194db7cd6 76 }
lrdawg99 0:1473318f27b6 77 }