Jurica Resetar / Mbed OS acd52832_Car_battery_ch

A simple example for analog input and EPD usage.

Dependencies:   GDEP015OC1 acn_nrf52_saadc aconno_bsp

Fork of acd52832_3_Analog_In by aconno dev team

main.cpp@8:c9f0aea93832, 2017-07-05 (annotated)

Committer:
jurica238814
Date:
Wed Jul 05 13:04:57 2017 +0000
Revision:
8:c9f0aea93832
Parent:
6:e848c82b5248
Child:
9:eef3ea422bfe
A battery voltage and a USB current measurement work. ;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jurica238814 0:dc96b5c8e3f6 1 /* Copyright (c) 2017 Aconno. All Rights Reserved.
jurica238814 0:dc96b5c8e3f6 2 *
jurica238814 0:dc96b5c8e3f6 3 * Licensees are granted free, non-transferable use of the information. NO
jurica238814 0:dc96b5c8e3f6 4 * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
jurica238814 0:dc96b5c8e3f6 5 * the file.
jurica238814 0:dc96b5c8e3f6 6 */
jurica238814 0:dc96b5c8e3f6 7
jurica238814 0:dc96b5c8e3f6 8 #include "mbed.h"
jurica238814 0:dc96b5c8e3f6 9 #include "acd52832_bsp.h"
jurica238814 0:dc96b5c8e3f6 10 #include "GDEP015OC1.h"
jurica238814 5:6566725c8835 11 #include "pictures.h"
jurica238814 0:dc96b5c8e3f6 12
jurica238814 6:e848c82b5248 13 #define DEBUG (0)
jurica238814 6:e848c82b5248 14 #define ADC_MAX_VALUE (4095)
jurica238814 5:6566725c8835 15 #define ADC_REF_VOLTAGE (3.6)
jurica238814 8:c9f0aea93832 16 #define VOLTAGE_DIVIDER_RATION (4.42)
jurica238814 8:c9f0aea93832 17 #define VOLTAGE_LOSS (0.4)
jurica238814 5:6566725c8835 18 #define CURRENT_FACTOR (36.0)
jurica238814 8:c9f0aea93832 19 #define BATTERY_MAX_V (12.6)
jurica238814 8:c9f0aea93832 20 #define BATTERY_MIN_V (11.85)
jurica238814 8:c9f0aea93832 21 #define BATTERY_STEP (0.15)
jurica238814 6:e848c82b5248 22 #define QUICK_CURRENT (float)(0.8)
jurica238814 6:e848c82b5248 23 #define LOW_CURRENT (float)(0.4)
jurica238814 6:e848c82b5248 24 #define NO_CURRENT (float)(0.01)
jurica238814 6:e848c82b5248 25 #define NUM_OF_MEASUREMENTS (20)
jurica238814 6:e848c82b5248 26 #define NO_CURRENT_STATE (0)
jurica238814 6:e848c82b5248 27 #define LOW_CURRENT_STATE (1)
jurica238814 6:e848c82b5248 28 #define QUICK_CURRENT_STATE (2)
jurica238814 5:6566725c8835 29
jurica238814 6:e848c82b5248 30 #define _BS_5 (5)
jurica238814 6:e848c82b5248 31 #define _BS_4 (4)
jurica238814 6:e848c82b5248 32 #define _BS_3 (3)
jurica238814 6:e848c82b5248 33 #define _BS_2 (2)
jurica238814 6:e848c82b5248 34 #define _BS_1 (1)
jurica238814 6:e848c82b5248 35 #define _BS_E (0)
jurica238814 0:dc96b5c8e3f6 36
jurica238814 0:dc96b5c8e3f6 37 SPI spi(PIN_EPD_MOSI, NC, PIN_EPD_SCK, NC);
jurica238814 0:dc96b5c8e3f6 38 GDEP015OC1 epd = GDEP015OC1(spi, PIN_EPD_CS, PIN_EPD_DC, PIN_EPD_RST, PIN_EPD_BUSY);
jurica238814 0:dc96b5c8e3f6 39
jurica238814 0:dc96b5c8e3f6 40 AnalogIn battery (p28);
jurica238814 0:dc96b5c8e3f6 41 AnalogIn usb1 (p29);
jurica238814 0:dc96b5c8e3f6 42 AnalogIn usb2 (p30);
jurica238814 0:dc96b5c8e3f6 43
jurica238814 6:e848c82b5248 44 uint8_t get_battery_level(float battery_voltage){
jurica238814 6:e848c82b5248 45 if(battery_voltage > BATTERY_MAX_V - BATTERY_STEP){
jurica238814 6:e848c82b5248 46 return _BS_5;
jurica238814 6:e848c82b5248 47 }
jurica238814 6:e848c82b5248 48 else if((battery_voltage > BATTERY_MAX_V - BATTERY_STEP * 2) && (battery_voltage < BATTERY_MAX_V - BATTERY_STEP * 1)){
jurica238814 6:e848c82b5248 49 return _BS_4;
jurica238814 6:e848c82b5248 50 }
jurica238814 6:e848c82b5248 51 else if((battery_voltage > BATTERY_MAX_V - BATTERY_STEP * 3) && (battery_voltage < BATTERY_MAX_V - BATTERY_STEP * 2)){
jurica238814 6:e848c82b5248 52 return _BS_3;
jurica238814 6:e848c82b5248 53 }
jurica238814 6:e848c82b5248 54 else if((battery_voltage > BATTERY_MAX_V - BATTERY_STEP * 4) && (battery_voltage < BATTERY_MAX_V - BATTERY_STEP * 3)){
jurica238814 6:e848c82b5248 55 return _BS_2;
jurica238814 6:e848c82b5248 56 }
jurica238814 6:e848c82b5248 57 else if((battery_voltage > BATTERY_MAX_V - BATTERY_STEP * 5) && (battery_voltage < BATTERY_MAX_V - BATTERY_STEP * 4)){
jurica238814 6:e848c82b5248 58 return _BS_1;
jurica238814 6:e848c82b5248 59 }
jurica238814 6:e848c82b5248 60 else if(battery_voltage < BATTERY_MAX_V - BATTERY_STEP * 5){
jurica238814 6:e848c82b5248 61 return _BS_E;
jurica238814 6:e848c82b5248 62 }
jurica238814 6:e848c82b5248 63 return 0;
jurica238814 6:e848c82b5248 64 }
jurica238814 6:e848c82b5248 65
jurica238814 6:e848c82b5248 66 uint8_t get_current_level(float current_value, uint8_t usb_state){
jurica238814 6:e848c82b5248 67 if(current_value < NO_CURRENT)
jurica238814 6:e848c82b5248 68 return NO_CURRENT_STATE;
jurica238814 6:e848c82b5248 69 else if(current_value > NO_CURRENT && current_value < LOW_CURRENT)
jurica238814 6:e848c82b5248 70 return LOW_CURRENT_STATE;
jurica238814 6:e848c82b5248 71 else if(current_value > LOW_CURRENT && current_value < QUICK_CURRENT){
jurica238814 6:e848c82b5248 72 // Determine current charger state depends on previous state
jurica238814 6:e848c82b5248 73 if(usb_state == LOW_CURRENT_STATE)
jurica238814 6:e848c82b5248 74 return LOW_CURRENT_STATE;
jurica238814 6:e848c82b5248 75 else if(usb_state == QUICK_CURRENT_STATE)
jurica238814 6:e848c82b5248 76 return QUICK_CURRENT_STATE;
jurica238814 6:e848c82b5248 77 }
jurica238814 6:e848c82b5248 78 else if(current_value > QUICK_CURRENT)
jurica238814 6:e848c82b5248 79 return QUICK_CURRENT_STATE;
jurica238814 6:e848c82b5248 80 return NO_CURRENT_STATE;
jurica238814 6:e848c82b5248 81 }
jurica238814 6:e848c82b5248 82
jurica238814 0:dc96b5c8e3f6 83 int main(){
jurica238814 5:6566725c8835 84 char low_string[25] = "LOW";
jurica238814 5:6566725c8835 85 char quick_string[25] = "QUICK";
jurica238814 4:f6f94ef38e6a 86 float adc1_mean=0, adc2_mean=0, adc3_mean=0;
jurica238814 5:6566725c8835 87 float battery_voltage = 0;
jurica238814 5:6566725c8835 88 float usb1_current = 0, usb2_current = 0;
jurica238814 4:f6f94ef38e6a 89 int count = 0;
jurica238814 6:e848c82b5248 90 uint8_t battery_level = 0;
jurica238814 6:e848c82b5248 91 uint8_t old_battery_level;
jurica238814 6:e848c82b5248 92 uint8_t usb1_current_state = 0, usb2_current_state = 0;
jurica238814 6:e848c82b5248 93 uint8_t usb1_old_state = 0, usb2_old_state = 0;
jurica238814 6:e848c82b5248 94 uint8_t change_flag = 1;
jurica238814 6:e848c82b5248 95
jurica238814 6:e848c82b5248 96 #if DEBUG
jurica238814 6:e848c82b5248 97 char buffer[25] = {0};
jurica238814 8:c9f0aea93832 98 float old_battery_voltage = 0;
jurica238814 8:c9f0aea93832 99 float old_usb1_current = 0;
jurica238814 8:c9f0aea93832 100 float old_usb2_current = 0;
jurica238814 6:e848c82b5248 101 #endif
jurica238814 4:f6f94ef38e6a 102
jurica238814 4:f6f94ef38e6a 103 NRF_SAADC->RESOLUTION = 0x00000002; // Set 12b resolution
jurica238814 5:6566725c8835 104
jurica238814 5:6566725c8835 105 epd.empty();
jurica238814 5:6566725c8835 106 epd.writeFull();
jurica238814 6:e848c82b5248 107
jurica238814 0:dc96b5c8e3f6 108 while(true){
jurica238814 0:dc96b5c8e3f6 109
jurica238814 4:f6f94ef38e6a 110 adc1_mean += battery.read_u16();
jurica238814 4:f6f94ef38e6a 111 adc2_mean += usb1.read_u16();
jurica238814 4:f6f94ef38e6a 112 adc3_mean += usb2.read_u16();
jurica238814 4:f6f94ef38e6a 113 count ++;
jurica238814 8:c9f0aea93832 114
jurica238814 6:e848c82b5248 115 if (count == NUM_OF_MEASUREMENTS){
jurica238814 6:e848c82b5248 116
jurica238814 6:e848c82b5248 117 adc1_mean /= NUM_OF_MEASUREMENTS;
jurica238814 6:e848c82b5248 118 adc2_mean /= NUM_OF_MEASUREMENTS;
jurica238814 6:e848c82b5248 119 adc3_mean /= NUM_OF_MEASUREMENTS;
jurica238814 5:6566725c8835 120 count = 0;
jurica238814 8:c9f0aea93832 121
jurica238814 8:c9f0aea93832 122 battery_voltage = adc1_mean*(ADC_REF_VOLTAGE/ADC_MAX_VALUE)*VOLTAGE_DIVIDER_RATION + VOLTAGE_LOSS;
jurica238814 8:c9f0aea93832 123 usb1_current = (adc2_mean*(ADC_REF_VOLTAGE/ADC_MAX_VALUE)) * CURRENT_FACTOR;
jurica238814 8:c9f0aea93832 124 usb2_current = (adc3_mean*(ADC_REF_VOLTAGE/ADC_MAX_VALUE)) * CURRENT_FACTOR;
jurica238814 6:e848c82b5248 125
jurica238814 6:e848c82b5248 126 battery_level = get_battery_level(battery_voltage);
jurica238814 8:c9f0aea93832 127 if(battery_level != old_battery_level || change_flag){
jurica238814 8:c9f0aea93832 128
jurica238814 6:e848c82b5248 129 old_battery_level = battery_level;
jurica238814 6:e848c82b5248 130 change_flag = 1;
jurica238814 6:e848c82b5248 131 switch(battery_level){
jurica238814 6:e848c82b5248 132 case(0):{
jurica238814 6:e848c82b5248 133 for(uint16_t x=0;x<5000;x++)
jurica238814 6:e848c82b5248 134 epd.fill(BS_E[x], x);
jurica238814 6:e848c82b5248 135 break;
jurica238814 6:e848c82b5248 136 }
jurica238814 6:e848c82b5248 137 case(1):{
jurica238814 6:e848c82b5248 138 for(uint16_t x=0;x<5000;x++)
jurica238814 6:e848c82b5248 139 epd.fill(BS_1[x], x);
jurica238814 6:e848c82b5248 140 break;
jurica238814 6:e848c82b5248 141 }
jurica238814 6:e848c82b5248 142 case(2):{
jurica238814 6:e848c82b5248 143 for(uint16_t x=0;x<5000;x++)
jurica238814 6:e848c82b5248 144 epd.fill(BS_2[x], x);
jurica238814 6:e848c82b5248 145 break;
jurica238814 6:e848c82b5248 146 }
jurica238814 6:e848c82b5248 147 case(3):{
jurica238814 6:e848c82b5248 148 for(uint16_t x=0;x<5000;x++)
jurica238814 6:e848c82b5248 149 epd.fill(BS_3[x], x);
jurica238814 6:e848c82b5248 150 break;
jurica238814 6:e848c82b5248 151 }
jurica238814 6:e848c82b5248 152 case(4):{
jurica238814 6:e848c82b5248 153 for(uint16_t x=0;x<5000;x++)
jurica238814 6:e848c82b5248 154 epd.fill(BS_4[x], x);
jurica238814 6:e848c82b5248 155 break;
jurica238814 6:e848c82b5248 156 }
jurica238814 6:e848c82b5248 157 case(5):{
jurica238814 6:e848c82b5248 158 for(uint16_t x=0;x<5000;x++)
jurica238814 6:e848c82b5248 159 epd.fill(BS_5[x], x);
jurica238814 6:e848c82b5248 160 break;
jurica238814 6:e848c82b5248 161 }
jurica238814 6:e848c82b5248 162 default: break;
jurica238814 6:e848c82b5248 163 }
jurica238814 8:c9f0aea93832 164
jurica238814 5:6566725c8835 165 epd.write();
jurica238814 5:6566725c8835 166 }
jurica238814 5:6566725c8835 167
jurica238814 6:e848c82b5248 168 usb1_current_state = get_current_level(usb1_current, usb1_old_state);
jurica238814 6:e848c82b5248 169 usb2_current_state = get_current_level(usb2_current, usb2_old_state);
jurica238814 6:e848c82b5248 170
jurica238814 6:e848c82b5248 171 if((usb1_old_state != usb1_current_state) || change_flag){
jurica238814 6:e848c82b5248 172 usb1_old_state = usb1_current_state;
jurica238814 6:e848c82b5248 173 switch(usb1_current_state){
jurica238814 6:e848c82b5248 174 case(NO_CURRENT_STATE):{
jurica238814 6:e848c82b5248 175 epd.writeString(quick_string, 25, 180, 1); // Delete the old state
jurica238814 6:e848c82b5248 176 epd.writeString(low_string, 25, 180, 1);
jurica238814 6:e848c82b5248 177 break;
jurica238814 6:e848c82b5248 178 }
jurica238814 6:e848c82b5248 179 case(LOW_CURRENT_STATE):{
jurica238814 6:e848c82b5248 180 epd.writeString(quick_string, 25, 180, 1); // Delete the old state
jurica238814 6:e848c82b5248 181 epd.writeString(low_string, 25, 180, 0);
jurica238814 6:e848c82b5248 182 break;
jurica238814 6:e848c82b5248 183 }
jurica238814 6:e848c82b5248 184 case(QUICK_CURRENT_STATE):{
jurica238814 6:e848c82b5248 185 epd.writeString(low_string, 25, 180, 1); // Delete the old state
jurica238814 6:e848c82b5248 186 epd.writeString(quick_string, 25, 180, 0);
jurica238814 6:e848c82b5248 187 break;
jurica238814 6:e848c82b5248 188 }
jurica238814 6:e848c82b5248 189 default: break;
jurica238814 6:e848c82b5248 190 }
jurica238814 6:e848c82b5248 191 epd.write(); // Write string to the EPD
jurica238814 5:6566725c8835 192 }
jurica238814 5:6566725c8835 193
jurica238814 6:e848c82b5248 194 if((usb2_old_state != usb2_current_state) || change_flag){
jurica238814 6:e848c82b5248 195 usb2_old_state = usb2_current_state;
jurica238814 6:e848c82b5248 196 switch(usb2_current_state){
jurica238814 6:e848c82b5248 197 case(NO_CURRENT_STATE):{
jurica238814 6:e848c82b5248 198 epd.writeString(low_string, 135, 180, 1); // Delete the old state
jurica238814 6:e848c82b5248 199 epd.writeString(quick_string, 135, 180, 1); // Delete the old state
jurica238814 6:e848c82b5248 200 break;
jurica238814 6:e848c82b5248 201 }
jurica238814 6:e848c82b5248 202 case(LOW_CURRENT_STATE):{
jurica238814 6:e848c82b5248 203 epd.writeString(quick_string, 135, 180, 1); // Delete the old state
jurica238814 6:e848c82b5248 204 epd.writeString(low_string, 135, 180, 0);
jurica238814 6:e848c82b5248 205 break;
jurica238814 6:e848c82b5248 206 }
jurica238814 6:e848c82b5248 207 case(QUICK_CURRENT_STATE):{
jurica238814 6:e848c82b5248 208 epd.writeString(low_string, 135, 180, 1); // Delete the old state
jurica238814 6:e848c82b5248 209 epd.writeString(quick_string, 135, 180, 0);
jurica238814 6:e848c82b5248 210 break;
jurica238814 6:e848c82b5248 211 }
jurica238814 6:e848c82b5248 212 default: break;
jurica238814 6:e848c82b5248 213 }
jurica238814 6:e848c82b5248 214 epd.write(); // Write string to the EPD
jurica238814 6:e848c82b5248 215 change_flag = 0;
jurica238814 5:6566725c8835 216 }
jurica238814 6:e848c82b5248 217
jurica238814 4:f6f94ef38e6a 218
jurica238814 8:c9f0aea93832 219 #if DEBUG
jurica238814 5:6566725c8835 220 // Print voltage and current values in debug mode
jurica238814 8:c9f0aea93832 221 sprintf(buffer, "Battery: %5.5fV", old_battery_voltage); // Create a string
jurica238814 8:c9f0aea93832 222 epd.writeString(buffer,25,95,1); // Write new data to the buffer
jurica238814 8:c9f0aea93832 223 epd.write(); // Write string to the EPD
jurica238814 8:c9f0aea93832 224 old_battery_voltage = battery_voltage;
jurica238814 8:c9f0aea93832 225
jurica238814 8:c9f0aea93832 226 sprintf(buffer, "Battery: %5.5fV", battery_voltage); // Create a string
jurica238814 5:6566725c8835 227 epd.writeString(buffer,25,95,0); // Write new data to the buffer
jurica238814 8:c9f0aea93832 228
jurica238814 8:c9f0aea93832 229 sprintf(buffer, "USB1: %5.5f", old_usb1_current); // Create a string
jurica238814 8:c9f0aea93832 230 epd.writeString(buffer,5,190,1); // Write new data to the buffer
jurica238814 8:c9f0aea93832 231 old_usb1_current = usb1_current;
jurica238814 8:c9f0aea93832 232 sprintf(buffer, "USB1: %5.5f", usb1_current); // Create a string
jurica238814 5:6566725c8835 233 epd.writeString(buffer,5,190,0); // Write new data to the buffer
jurica238814 6:e848c82b5248 234
jurica238814 8:c9f0aea93832 235 sprintf(buffer, "USB2: %5.5fA", old_usb2_current); // Create a string
jurica238814 8:c9f0aea93832 236 epd.writeString(buffer,105,190,1); // Write new data to the buffer
jurica238814 8:c9f0aea93832 237 old_usb2_current = usb2_current;
jurica238814 8:c9f0aea93832 238 sprintf(buffer, "USB2: %5.5fA", usb2_current); // Create a string
jurica238814 5:6566725c8835 239 epd.writeString(buffer,105,190,0); // Write new data to the buffer
jurica238814 8:c9f0aea93832 240
jurica238814 6:e848c82b5248 241 epd.write();
jurica238814 5:6566725c8835 242 #endif
jurica238814 4:f6f94ef38e6a 243
jurica238814 4:f6f94ef38e6a 244 adc1_mean = 0;
jurica238814 4:f6f94ef38e6a 245 adc2_mean = 0;
jurica238814 4:f6f94ef38e6a 246 adc3_mean = 0;
jurica238814 4:f6f94ef38e6a 247 }
jurica238814 0:dc96b5c8e3f6 248 }
jurica238814 0:dc96b5c8e3f6 249 }