Jurica Resetar
A simple example for analog input and EPD usage.
Dependencies: GDEP015OC1 acn_nrf52_saadc aconno_bsp
Fork of
acd52832_Car_battery_ch
by 
Jurica Resetar
Diff: main.cpp
- Revision:
- 6:e848c82b5248
- Parent:
- 5:6566725c8835
- Child:
- 8:c9f0aea93832
--- a/main.cpp Fri Jun 30 11:45:56 2017 +0000
+++ b/main.cpp Tue Jul 04 17:55:04 2017 +0000
@@ -10,17 +10,28 @@
#include "GDEP015OC1.h"
#include "pictures.h"
-#define DEBUG (1)
-#define ADC_MAX_VALUE (4092)
+#define DEBUG (0)
+#define ADC_MAX_VALUE (4095)
#define ADC_REF_VOLTAGE (3.6)
#define VOLTAGE_DIVIDER_RATION (130.0/30)
#define CURRENT_FACTOR (36.0)
-#define BATTERY_MAX_V (14.0)
+#define BATTERY_MAX_V (12.8)
#define BATTERY_MIN_V (12.0)
-#define BATTERY_STEP (0.4)
-#define LOW_QUICK_CURRENT (0.5)
+#define BATTERY_STEP (0.2)
+#define QUICK_CURRENT (float)(0.8)
+#define LOW_CURRENT (float)(0.4)
+#define NO_CURRENT (float)(0.01)
+#define NUM_OF_MEASUREMENTS (20)
+#define NO_CURRENT_STATE (0)
+#define LOW_CURRENT_STATE (1)
+#define QUICK_CURRENT_STATE (2)
-
+#define _BS_5 (5)
+#define _BS_4 (4)
+#define _BS_3 (3)
+#define _BS_2 (2)
+#define _BS_1 (1)
+#define _BS_E (0)
SPI spi(PIN_EPD_MOSI, NC, PIN_EPD_SCK, NC);
GDEP015OC1 epd = GDEP015OC1(spi, PIN_EPD_CS, PIN_EPD_DC, PIN_EPD_RST, PIN_EPD_BUSY);
@@ -29,109 +40,194 @@
AnalogIn usb1 (p29);
AnalogIn usb2 (p30);
+
+uint8_t get_battery_level(float battery_voltage){
+ if(battery_voltage > BATTERY_MAX_V - BATTERY_STEP){
+ return _BS_5;
+ }
+ else if((battery_voltage > BATTERY_MAX_V - BATTERY_STEP * 2) && (battery_voltage < BATTERY_MAX_V - BATTERY_STEP * 1)){
+ return _BS_4;
+ }
+ else if((battery_voltage > BATTERY_MAX_V - BATTERY_STEP * 3) && (battery_voltage < BATTERY_MAX_V - BATTERY_STEP * 2)){
+ return _BS_3;
+ }
+ else if((battery_voltage > BATTERY_MAX_V - BATTERY_STEP * 4) && (battery_voltage < BATTERY_MAX_V - BATTERY_STEP * 3)){
+ return _BS_2;
+ }
+ else if((battery_voltage > BATTERY_MAX_V - BATTERY_STEP * 5) && (battery_voltage < BATTERY_MAX_V - BATTERY_STEP * 4)){
+ return _BS_1;
+ }
+ else if(battery_voltage < BATTERY_MAX_V - BATTERY_STEP * 5){
+ return _BS_E;
+ }
+ return 0;
+}
+
+uint8_t get_current_level(float current_value, uint8_t usb_state){
+ if(current_value < NO_CURRENT)
+ return NO_CURRENT_STATE;
+ else if(current_value > NO_CURRENT && current_value < LOW_CURRENT)
+ return LOW_CURRENT_STATE;
+ else if(current_value > LOW_CURRENT && current_value < QUICK_CURRENT){
+ // Determine current charger state depends on previous state
+ if(usb_state == LOW_CURRENT_STATE)
+ return LOW_CURRENT_STATE;
+ else if(usb_state == QUICK_CURRENT_STATE)
+ return QUICK_CURRENT_STATE;
+ }
+ else if(current_value > QUICK_CURRENT)
+ return QUICK_CURRENT_STATE;
+ return NO_CURRENT_STATE;
+}
+
int main(){
- char buffer[25] = {0};
char low_string[25] = "LOW";
char quick_string[25] = "QUICK";
float adc1_mean=0, adc2_mean=0, adc3_mean=0;
float battery_voltage = 0;
float usb1_current = 0, usb2_current = 0;
int count = 0;
+ uint8_t battery_level = 0;
+ uint8_t old_battery_level;
+ uint8_t usb1_current_state = 0, usb2_current_state = 0;
+ uint8_t usb1_old_state = 0, usb2_old_state = 0;
+ uint8_t change_flag = 1;
+
+ #if DEBUG
+ char buffer[25] = {0};
+ #endif
NRF_SAADC->RESOLUTION = 0x00000002; // Set 12b resolution
epd.empty();
epd.writeFull();
-
+
while(true){
adc1_mean += battery.read_u16();
adc2_mean += usb1.read_u16();
adc3_mean += usb2.read_u16();
count ++;
-
- if (count == 10){
-
- adc1_mean /= 10;
- adc2_mean /= 10;
- adc3_mean /= 10;
+
+ #if DEBUG
+ epd.empty();
+ epd.writeFull();
+ #endif
+ if (count == NUM_OF_MEASUREMENTS){
+
+ adc1_mean /= NUM_OF_MEASUREMENTS;
+ adc2_mean /= NUM_OF_MEASUREMENTS;
+ adc3_mean /= NUM_OF_MEASUREMENTS;
count = 0;
battery_voltage = adc1_mean*(ADC_REF_VOLTAGE/ADC_MAX_VALUE)*VOLTAGE_DIVIDER_RATION;
usb1_current = (CURRENT_FACTOR/ADC_MAX_VALUE)*adc2_mean;
usb2_current = (CURRENT_FACTOR/ADC_MAX_VALUE)*adc3_mean;
-
- if(battery_voltage > BATTERY_MAX_V - BATTERY_STEP){
- //Load image
- for(uint16_t x=0;x<5000;x++)
- epd.fill(BS_5[x], x);
- epd.write();
- }
- else if((battery_voltage > BATTERY_MAX_V - BATTERY_STEP * 2) && (battery_voltage < BATTERY_MAX_V - BATTERY_STEP * 1)){
- //Load image
- for(uint16_t x=0;x<5000;x++)
- epd.fill(BS_4[x], x);
- epd.write();
- }
- else if((battery_voltage > BATTERY_MAX_V - BATTERY_STEP * 3) && (battery_voltage < BATTERY_MAX_V - BATTERY_STEP * 2)){
- //Load image
- for(uint16_t x=0;x<5000;x++)
- epd.fill(BS_3[x], x);
- epd.write();
- }
- else if((battery_voltage > BATTERY_MAX_V - BATTERY_STEP * 4) && (battery_voltage < BATTERY_MAX_V - BATTERY_STEP * 3)){
- //Load image
- for(uint16_t x=0;x<5000;x++)
- epd.fill(BS_2[x], x);
- epd.write();
- }
- else if((battery_voltage > BATTERY_MAX_V - BATTERY_STEP * 5) && (battery_voltage < BATTERY_MAX_V - BATTERY_STEP * 4)){
- //Load image
- for(uint16_t x=0;x<5000;x++)
- epd.fill(BS_1[x], x);
- epd.write();
- }
- else if(battery_voltage < BATTERY_MAX_V - BATTERY_STEP * 5){
- //Load image
- for(uint16_t x=0;x<5000;x++)
- epd.fill(BS_E[x], x);
+
+ battery_level = get_battery_level(battery_voltage);
+ if(battery_level != old_battery_level){
+ old_battery_level = battery_level;
+ change_flag = 1;
+ switch(battery_level){
+ case(0):{
+ for(uint16_t x=0;x<5000;x++)
+ epd.fill(BS_E[x], x);
+ break;
+ }
+ case(1):{
+ for(uint16_t x=0;x<5000;x++)
+ epd.fill(BS_1[x], x);
+ break;
+ }
+ case(2):{
+ for(uint16_t x=0;x<5000;x++)
+ epd.fill(BS_2[x], x);
+ break;
+ }
+ case(3):{
+ for(uint16_t x=0;x<5000;x++)
+ epd.fill(BS_3[x], x);
+ break;
+ }
+ case(4):{
+ for(uint16_t x=0;x<5000;x++)
+ epd.fill(BS_4[x], x);
+ break;
+ }
+ case(5):{
+ for(uint16_t x=0;x<5000;x++)
+ epd.fill(BS_5[x], x);
+ break;
+ }
+ default: break;
+ }
epd.write();
}
- if(usb1_current < (float)LOW_QUICK_CURRENT){
- epd.writeString(low_string, 25, 180, 0);
- epd.write();
- }
- else{
- epd.writeString(quick_string, 25, 180, 0);
- epd.write();
+ usb1_current_state = get_current_level(usb1_current, usb1_old_state);
+ usb2_current_state = get_current_level(usb2_current, usb2_old_state);
+
+ if((usb1_old_state != usb1_current_state) || change_flag){
+ usb1_old_state = usb1_current_state;
+ switch(usb1_current_state){
+ case(NO_CURRENT_STATE):{
+ epd.writeString(quick_string, 25, 180, 1); // Delete the old state
+ epd.writeString(low_string, 25, 180, 1);
+ break;
+ }
+ case(LOW_CURRENT_STATE):{
+ epd.writeString(quick_string, 25, 180, 1); // Delete the old state
+ epd.writeString(low_string, 25, 180, 0);
+ break;
+ }
+ case(QUICK_CURRENT_STATE):{
+ epd.writeString(low_string, 25, 180, 1); // Delete the old state
+ epd.writeString(quick_string, 25, 180, 0);
+ break;
+ }
+ default: break;
+ }
+ epd.write(); // Write string to the EPD
}
- if(usb2_current < (float)LOW_QUICK_CURRENT){
- epd.writeString(low_string, 135, 180, 0);
- epd.write();
+ if((usb2_old_state != usb2_current_state) || change_flag){
+ usb2_old_state = usb2_current_state;
+ switch(usb2_current_state){
+ case(NO_CURRENT_STATE):{
+ epd.writeString(low_string, 135, 180, 1); // Delete the old state
+ epd.writeString(quick_string, 135, 180, 1); // Delete the old state
+ break;
+ }
+ case(LOW_CURRENT_STATE):{
+ epd.writeString(quick_string, 135, 180, 1); // Delete the old state
+ epd.writeString(low_string, 135, 180, 0);
+ break;
+ }
+ case(QUICK_CURRENT_STATE):{
+ epd.writeString(low_string, 135, 180, 1); // Delete the old state
+ epd.writeString(quick_string, 135, 180, 0);
+ break;
+ }
+ default: break;
+ }
+ epd.write(); // Write string to the EPD
+ change_flag = 0;
}
- else{
- epd.writeString(quick_string, 135, 180, 0);
- epd.write();
- }
+
-
-
- #if DEBUG
- /*
+ #if DEBUG
// Print voltage and current values in debug mode
sprintf(buffer, "Battery: %5.5fV", adc1_mean*(ADC_REF_VOLTAGE/ADC_MAX_VALUE)*VOLTAGE_DIVIDER_RATION); // Create a string
epd.writeString(buffer,25,95,0); // Write new data to the buffer
epd.write(); // Write string to the EPD
- */
+
sprintf(buffer, "USB1: %5.5fA", (CURRENT_FACTOR/ADC_MAX_VALUE)*adc2_mean); // Create a string
epd.writeString(buffer,5,190,0); // Write new data to the buffer
- epd.write(); // Write string to the EPD
-
+
sprintf(buffer, "USB1: %5.5fA", (CURRENT_FACTOR/ADC_MAX_VALUE)*adc3_mean); // Create a string
epd.writeString(buffer,105,190,0); // Write new data to the buffer
- epd.write(); // Write string to the EPD
+
+ epd.write();
#endif
adc1_mean = 0;