charles young / Mbed 2 deprecated GEO_COUNTER_L432KC

Charles Young's development fork. Going forward I only want to push mature code to main repository.

Dependencies:   mbed

Fork of GEO_COUNTER_L432KC by Geo Electronics "Geo Counter"

main.cpp@15:808e98afe32b, 2018-09-03 (annotated)

Committer:
charlesdavidyoung
Date:
Mon Sep 03 16:27:05 2018 +0000
Revision:
15:808e98afe32b
Parent:
14:9018d7c592a0
Child:
16:b2e77eb76ab4
reading QEPB

Who changed what in which revision?

UserRevisionLine numberNew contents of line
walter76 2:ac0ed3d84d44 1 // GEO COUNTER V1 firmware
walter76 2:ac0ed3d84d44 2 // This FW provides a basic operation of GEO-COUNTER
walter76 2:ac0ed3d84d44 3 //
walter76 2:ac0ed3d84d44 4 // Latest review: August 27, 2018 - Walter Trovo
walter76 1:75827d765e34 5 //
walter76 1:75827d765e34 6 // Feb 14, 2018: initial release aimed to test the counters, the serial port
walter76 1:75827d765e34 7 // the PWM output and the MAX7219 operation.
walter76 1:75827d765e34 8 // Feb 15, 2018: Removed MAX7219 libray (replaced with custom routine).
walter76 1:75827d765e34 9 // Added 74HC595 routine. Added beep. Added Gate_write
walter76 1:75827d765e34 10 //
walter76 2:ac0ed3d84d44 11
walter76 1:75827d765e34 12
walter76 1:75827d765e34 13 // this block includes key libraries
walter76 1:75827d765e34 14 #include "mbed.h" // global Mbed library (always needed)
walter76 1:75827d765e34 15 #include <string> // strings management
walter76 1:75827d765e34 16 #include "QEI.h" // Quadrature Encoder functions
walter76 1:75827d765e34 17
walter76 1:75827d765e34 18 // definitions of fixed parameters
walter76 0:6d1742703713 19
walter76 1:75827d765e34 20 #define DEC_MODE 0x09FF // BCD decoding on all digits
walter76 1:75827d765e34 21 #define BRIGHTNESS 0x0A0F // max brightness
walter76 1:75827d765e34 22 #define SCAN_LIM 0x0B07 // use all 8 digits
walter76 1:75827d765e34 23 #define TURN_ON 0x0C01 // no shutdown (operating)
walter76 1:75827d765e34 24 #define SHUTDOWN 0x0C00 // shutdown
walter76 1:75827d765e34 25 #define TEST 0x0F00 // no test
walter76 1:75827d765e34 26
walter76 1:75827d765e34 27 #define DT 1 // delay time in us for SPI emulation
walter76 1:75827d765e34 28
walter76 1:75827d765e34 29 #define TGATE 10 // gate time (currently fixed for testing purpose)
walter76 1:75827d765e34 30 #define MAX_VAL 999999 // Max value managed by the 6-digits display
walter76 0:6d1742703713 31
walter76 1:75827d765e34 32
walter76 1:75827d765e34 33 #define CPM 0x01
walter76 1:75827d765e34 34 #define CPS 0x02
walter76 1:75827d765e34 35 #define PLS 0x04
walter76 1:75827d765e34 36 #define VOLTS 0x08
walter76 1:75827d765e34 37 #define CNT1 0x10
walter76 1:75827d765e34 38 #define CNT2 0x20
walter76 1:75827d765e34 39 #define HV 0x40
walter76 1:75827d765e34 40 #define MENU 0x80
charlesdavidyoung 13:0e7b06af9a2a 41 uint8_t LED_statuses[] = {CPM, CPS, PLS, VOLTS, CNT1, CNT2, HV, MENU};
Charles David Young 7:9f975e00600c 42 uint8_t LED_status = CPM;
Charles David Young 7:9f975e00600c 43 uint8_t LED_status_index = 0;
walter76 1:75827d765e34 44
walter76 1:75827d765e34 45 // definitions of the input/outputs (pins)
walter76 1:75827d765e34 46 DigitalOut AUX (D2); // AUX control for GPS module
walter76 0:6d1742703713 47 InterruptIn TRIG1 (D3); // Counter 1 trigger
walter76 0:6d1742703713 48 InterruptIn TRIG2 (D6); // Counter 2 trigger
charlesdavidyoung 15:808e98afe32b 49 DigitalIn QEPB (D9); // Quadrature encoder pushbutton
walter76 0:6d1742703713 50 PwmOut PWM (D10); // PWM output
walter76 1:75827d765e34 51 DigitalOut BUZZ (D13); // Buzzer
walter76 0:6d1742703713 52
walter76 1:75827d765e34 53 AnalogIn AIN0 (A0); // ADC input 0 (High Voltage)
walter76 1:75827d765e34 54 AnalogIn AIN1 (A1); // ADC input 1 (aux)
walter76 1:75827d765e34 55 DigitalOut CS2 (A2); // 74HC595 RCLK (pin 12)
walter76 1:75827d765e34 56 DigitalOut CS1 (A3); // MAX7219 CS (pin 12)
walter76 1:75827d765e34 57 DigitalOut SCK (A4); // 74HC595 SRCLK (pin 11) & MAX7219 SCK (pin 13)
walter76 1:75827d765e34 58 AnalogIn KEYB (A5); // Keyboard input (SW2 & SW3)
walter76 1:75827d765e34 59 DigitalOut MOSI (A6); // 74HC595 SER (pin 14) & MAX7219 DIN (pin 1)
walter76 1:75827d765e34 60 DigitalIn UN (A7); // Unused (in V1 PCB A5 and A7 must be connected)
walter76 1:75827d765e34 61
charlesdavidyoung 5:4f90b458dbdf 62 // LED on processor board
charlesdavidyoung 5:4f90b458dbdf 63 DigitalOut led1(LED1);
walter76 1:75827d765e34 64
walter76 1:75827d765e34 65 // definitions of peripherals and devices
Charles David Young 7:9f975e00600c 66
Charles David Young 7:9f975e00600c 67 // QEI class supports the mode wheel. In its most basic function it will tell
Charles David Young 7:9f975e00600c 68 // us which direction the wheel is moving (right or left) so that we can
Charles David Young 7:9f975e00600c 69 // use it to select the current mode.
walter76 1:75827d765e34 70 QEI Wheel(D12, D11, NC, 16); // Quadrature encoder
Charles David Young 14:9018d7c592a0 71 int WheelCurrentState = 0;
Charles David Young 7:9f975e00600c 72 int WheelCurrent = 0;
Charles David Young 7:9f975e00600c 73 int WheelPrevious = 0;
Charles David Young 7:9f975e00600c 74
walter76 1:75827d765e34 75 I2C i2c(D4, D5); // I2C port
walter76 1:75827d765e34 76 Ticker Sec_Beat; // 1 second ticker
walter76 1:75827d765e34 77 Serial PC(USBTX, USBRX); // Virtual COM via USB (PC connection)
walter76 1:75827d765e34 78 Serial GPS(D1, D0); // Serial port for GPS module
walter76 0:6d1742703713 79
walter76 0:6d1742703713 80 // Global variables
walter76 1:75827d765e34 81 uint8_t Disp_Digit[8]; // used to manage 8-digits through MAX7219
walter76 1:75827d765e34 82 uint16_t Stream; // used to stream out serial data to MAX7219
walter76 1:75827d765e34 83 time_t seconds; // Real-Time Clock (RTC) timestamp
walter76 1:75827d765e34 84 unsigned int value = 0; // displayed value on the 6-digits of the display
walter76 1:75827d765e34 85 uint8_t gate = TGATE; // displayed value on the 2-digits display
walter76 1:75827d765e34 86 uint32_t Count1, Count2; // pulse counters (32-bit)
walter76 1:75827d765e34 87 char Text[40]=""; // used to send messages over the serial port
walter76 1:75827d765e34 88 uint8_t Disp_mode = 0x01, Disp_unit = 0xA0; // status of 1st row and 2nd rows of LEDs
kd5byb 4:b17c6556cf1f 89 bool Stopped = 0; // status of counting activity
charlesdavidyoung 5:4f90b458dbdf 90 bool StartStopPressed = 0;// status of counting activity
walter76 1:75827d765e34 91 double ADC_val; // used to read ADC value
walter76 0:6d1742703713 92
walter76 1:75827d765e34 93 // ----- Prototypes of routines (defined below the main) -------------------
walter76 1:75827d765e34 94 void Update(void); // periodically called by the ticker
walter76 1:75827d765e34 95 void Count1_up(void); // called every time an edge is detected on TRIG1 pin
walter76 1:75827d765e34 96 void Count2_up(void); // called every time an edge is detected on TRIG2 pin
walter76 1:75827d765e34 97 void Beep(void); // used to generate a short beep (buzzer)
walter76 1:75827d765e34 98 void LEDs_write(unsigned short); // write to 74HC595 (8x LEDs)
walter76 1:75827d765e34 99 void Display_init(void); // initialize MAX7219
walter76 1:75827d765e34 100 void Display_6D_write(uint8_t); // write to MAX7219 (Main 6-digits display)
walter76 1:75827d765e34 101 void Display_2D_write(unsigned short); // write to MAX7219 (Gate 2-digits display)
walter76 0:6d1742703713 102
walter76 0:6d1742703713 103 //==============================================================================
walter76 0:6d1742703713 104 //==============================================================================
walter76 0:6d1742703713 105
walter76 0:6d1742703713 106 int main()
walter76 0:6d1742703713 107 {
walter76 0:6d1742703713 108
walter76 1:75827d765e34 109 PC.baud(115200); // set baud-rate of virtual COM port (PC connection)
charlesdavidyoung 5:4f90b458dbdf 110 PC.printf("\nGEO COUNTER V1 2108");
walter76 1:75827d765e34 111 PC.printf(__DATE__);
walter76 1:75827d765e34 112 PC.printf(" ");
walter76 1:75827d765e34 113 PC.printf(__TIME__);
walter76 1:75827d765e34 114
walter76 2:ac0ed3d84d44 115 GPS.baud(9600); // set the baud-rate of the serial port dedicated to the GPS
walter76 0:6d1742703713 116
walter76 1:75827d765e34 117 CS1 = 1; // presets CS of MAX7219
walter76 1:75827d765e34 118 CS2 = 1; // preset CS of 74HC595
walter76 1:75827d765e34 119
charlesdavidyoung 13:0e7b06af9a2a 120 Display_6D_write(0x543210);
walter76 1:75827d765e34 121 Display_2D_write(TGATE);
walter76 1:75827d765e34 122 Display_init(); // initialize MAX7219
walter76 0:6d1742703713 123
walter76 1:75827d765e34 124 // RTC is supposed to be loose time at power down (no backup battery)
walter76 1:75827d765e34 125 // An initialization is performed anyway
walter76 1:75827d765e34 126 set_time(0); // Set time
walter76 0:6d1742703713 127
walter76 1:75827d765e34 128 Wheel.reset(); // clear the variable associated to the encoder
walter76 1:75827d765e34 129
walter76 1:75827d765e34 130 PWM.period_ms(3); // set the PWM period
walter76 1:75827d765e34 131 PWM.write(0.8); // set the PWM duty-cycle
walter76 1:75827d765e34 132
walter76 1:75827d765e34 133 LEDs_write(0x00); // initialize LEDs (CPM and CNT1 on)
walter76 1:75827d765e34 134 Beep(); // initial beep
walter76 1:75827d765e34 135
walter76 1:75827d765e34 136 // set the 1 sec ticker to periodically call the Update() routine
walter76 1:75827d765e34 137 // NOTE: this is also the 1-sec time base for counters. A better approach
walter76 1:75827d765e34 138 // would replace the ticker with an interrupt from the RTC (to be implemented)
charlesdavidyoung 13:0e7b06af9a2a 139 Sec_Beat.attach_us(&Update, 100000);
walter76 0:6d1742703713 140 //RTC::attach(&Update, RTC::Second);
walter76 1:75827d765e34 141 //RTC::detach(RTC::Second);
walter76 1:75827d765e34 142
walter76 1:75827d765e34 143 // main loop does nothing as all activities are interrupt driven
walter76 0:6d1742703713 144 while(1)
walter76 0:6d1742703713 145 {
walter76 2:ac0ed3d84d44 146 // dance (or drink a beer)
walter76 0:6d1742703713 147 }
walter76 0:6d1742703713 148 }
walter76 0:6d1742703713 149
walter76 0:6d1742703713 150
walter76 1:75827d765e34 151 //-------- END OF MAIN --------------
walter76 0:6d1742703713 152 //==============================================================================
walter76 0:6d1742703713 153
walter76 1:75827d765e34 154 // Definition of routines
walter76 1:75827d765e34 155
walter76 1:75827d765e34 156 //---------------------------------------------------------------------------
walter76 1:75827d765e34 157 // Update values to be displayed
Charles David Young 10:f48cc6be5ae8 158 void logToPC()
Charles David Young 10:f48cc6be5ae8 159 {
Charles David Young 10:f48cc6be5ae8 160 PC.printf("\nADC: %.02f", ADC_val);
Charles David Young 10:f48cc6be5ae8 161 PC.printf(Stopped ? " stopped" : " started");
Charles David Young 10:f48cc6be5ae8 162 // Timestamp to PC (debug)
Charles David Young 10:f48cc6be5ae8 163 seconds = time(NULL); // get current time
Charles David Young 10:f48cc6be5ae8 164 strftime(Text, 50, "%H:%M:%S", localtime(&seconds));
Charles David Young 10:f48cc6be5ae8 165 PC.printf(" RTC: %s, CNT1: %7d CNT2: %7d",Text, Count1, Count2);
charlesdavidyoung 15:808e98afe32b 166 PC.printf(" wheel %d %d", WheelCurrent, QEPB.read());
Charles David Young 10:f48cc6be5ae8 167 }
walter76 1:75827d765e34 168
walter76 1:75827d765e34 169 void Update()
walter76 1:75827d765e34 170 {
Charles David Young 7:9f975e00600c 171 LEDs_write(LED_statuses[LED_status_index]);
Charles David Young 7:9f975e00600c 172
walter76 1:75827d765e34 173 ADC_val = KEYB.read(); // read voltage from keyboard
charlesdavidyoung 5:4f90b458dbdf 174 if ( (ADC_val<0.1) // START/STOP pushbutton pressed
charlesdavidyoung 5:4f90b458dbdf 175 && (!StartStopPressed))
charlesdavidyoung 5:4f90b458dbdf 176 {
charlesdavidyoung 5:4f90b458dbdf 177 StartStopPressed = true;
charlesdavidyoung 5:4f90b458dbdf 178 Stopped=!Stopped; // toggle status
charlesdavidyoung 5:4f90b458dbdf 179 }
charlesdavidyoung 5:4f90b458dbdf 180 else
charlesdavidyoung 5:4f90b458dbdf 181 StartStopPressed = false;
charlesdavidyoung 5:4f90b458dbdf 182
charlesdavidyoung 5:4f90b458dbdf 183 if((ADC_val>0.6)&&(ADC_val<0.7)) // CLEAR pushbutton pressed
charlesdavidyoung 5:4f90b458dbdf 184 {
walter76 1:75827d765e34 185 Count1 = 0; // clear counters
walter76 1:75827d765e34 186 Count2 = 0;
charlesdavidyoung 5:4f90b458dbdf 187 }
charlesdavidyoung 5:4f90b458dbdf 188
walter76 1:75827d765e34 189 if(Stopped)
walter76 1:75827d765e34 190 {
walter76 1:75827d765e34 191 // disable interrupts on TRIG1 and TRIG2
kd5byb 4:b17c6556cf1f 192
walter76 1:75827d765e34 193 TRIG1.rise(NULL);
walter76 1:75827d765e34 194 TRIG2.rise(NULL);
walter76 0:6d1742703713 195
walter76 1:75827d765e34 196 // show zero gate time
walter76 1:75827d765e34 197 gate = 0;
walter76 1:75827d765e34 198 Display_2D_write(gate);
walter76 0:6d1742703713 199
walter76 1:75827d765e34 200 // show selected content on main display
walter76 1:75827d765e34 201 value = (int)(Count1/TGATE);
walter76 1:75827d765e34 202 Display_6D_write(value); // refresh the main display
walter76 1:75827d765e34 203 }
walter76 0:6d1742703713 204
walter76 0:6d1742703713 205 else
walter76 0:6d1742703713 206 {
walter76 1:75827d765e34 207 // Enable interrupts on rising edge of digital inputs TRIG1 & TRIG2
walter76 1:75827d765e34 208 TRIG1.rise(&Count1_up);
walter76 1:75827d765e34 209 TRIG2.rise(&Count2_up);
walter76 1:75827d765e34 210
walter76 1:75827d765e34 211 if(gate==0) // show the counter value at the end of the gate time
walter76 1:75827d765e34 212 {
walter76 1:75827d765e34 213 value = (int)(Count1/TGATE);
walter76 0:6d1742703713 214
walter76 1:75827d765e34 215 Display_6D_write(value); // refresh the main display
walter76 1:75827d765e34 216
walter76 1:75827d765e34 217 Count1 = 0; // clear both counters
walter76 1:75827d765e34 218 Count2 = 0;
walter76 1:75827d765e34 219 gate = TGATE;// and reload the gate time
walter76 1:75827d765e34 220
walter76 1:75827d765e34 221 }
walter76 1:75827d765e34 222
walter76 1:75827d765e34 223 Display_2D_write(gate); // show gate time countdown
walter76 1:75827d765e34 224 gate--;
walter76 0:6d1742703713 225 }
walter76 1:75827d765e34 226
Charles David Young 14:9018d7c592a0 227 WheelCurrent = int(Wheel.getPulses());
Charles David Young 14:9018d7c592a0 228 WheelCurrentState = int(Wheel.getCurrentState());
Charles David Young 7:9f975e00600c 229 if (WheelCurrent > WheelPrevious)
charlesdavidyoung 13:0e7b06af9a2a 230 LED_status_index = ++LED_status_index % sizeof(LED_statuses);
Charles David Young 7:9f975e00600c 231 else
Charles David Young 7:9f975e00600c 232 if (WheelCurrent < WheelPrevious)
charlesdavidyoung 13:0e7b06af9a2a 233 LED_status_index = --LED_status_index % sizeof(LED_statuses);
Charles David Young 7:9f975e00600c 234 WheelPrevious = WheelCurrent;
Charles David Young 7:9f975e00600c 235
Charles David Young 10:f48cc6be5ae8 236 logToPC();
walter76 0:6d1742703713 237 return;
walter76 0:6d1742703713 238 }
walter76 0:6d1742703713 239
walter76 0:6d1742703713 240 //---------------------------------------------------------------------------
walter76 1:75827d765e34 241 // Increment CNT1 every time a rising edge is detected on TRIG1 (interrupt)
walter76 1:75827d765e34 242
walter76 1:75827d765e34 243 void Count1_up(void)
walter76 1:75827d765e34 244 {
walter76 1:75827d765e34 245 Count1++;
walter76 1:75827d765e34 246 return;
walter76 1:75827d765e34 247 }
walter76 1:75827d765e34 248
walter76 1:75827d765e34 249
walter76 1:75827d765e34 250 //---------------------------------------------------------------------------
walter76 1:75827d765e34 251 // Increment CNT1 every time a rising edge is detected on TRIG2 (interrupt)
walter76 1:75827d765e34 252
walter76 1:75827d765e34 253 void Count2_up(void)
walter76 1:75827d765e34 254 {
walter76 1:75827d765e34 255 Count2++;
walter76 1:75827d765e34 256 return;
walter76 1:75827d765e34 257 }
walter76 1:75827d765e34 258
walter76 1:75827d765e34 259
walter76 1:75827d765e34 260 //---------------------------------------------------------------------------
walter76 1:75827d765e34 261 //Generates a short beep via BUZZ
walter76 1:75827d765e34 262
walter76 1:75827d765e34 263 void Beep(void)
walter76 1:75827d765e34 264 {
walter76 1:75827d765e34 265 BUZZ = 1; // turn-on the buzzer
walter76 1:75827d765e34 266 wait(0.3); // wait
walter76 1:75827d765e34 267 BUZZ = 0; // turn-off the buzzer
walter76 0:6d1742703713 268 return;
walter76 0:6d1742703713 269 }
walter76 0:6d1742703713 270
walter76 0:6d1742703713 271
walter76 0:6d1742703713 272 //---------------------------------------------------------------------------
walter76 1:75827d765e34 273 //Write to 74HC595 (LEDs) - Take care to avoid conflict with MAX7219
walter76 1:75827d765e34 274
walter76 1:75827d765e34 275 void LEDs_write(unsigned short data_val)
walter76 1:75827d765e34 276 {
walter76 1:75827d765e34 277 // Update 74HC595 shift registers
walter76 1:75827d765e34 278 unsigned short mask;
walter76 1:75827d765e34 279
walter76 1:75827d765e34 280 SCK = 0;
walter76 1:75827d765e34 281 wait_us(DT);
walter76 1:75827d765e34 282 CS2 = 0;
walter76 1:75827d765e34 283
walter76 1:75827d765e34 284 for(mask = 0x80; mask!= 0; mask>>= 1)
walter76 1:75827d765e34 285 {
walter76 1:75827d765e34 286 wait_us(DT);
walter76 1:75827d765e34 287 SCK = 0;
walter76 1:75827d765e34 288 if(mask & data_val)
walter76 1:75827d765e34 289 MOSI = 0;
walter76 1:75827d765e34 290 else
walter76 1:75827d765e34 291 MOSI = 1;
walter76 1:75827d765e34 292 wait_us(DT);
walter76 1:75827d765e34 293 SCK = 1;
walter76 1:75827d765e34 294 }
walter76 1:75827d765e34 295
walter76 1:75827d765e34 296 SCK = 0;
walter76 1:75827d765e34 297 wait_us(DT);
walter76 1:75827d765e34 298 CS2 = 1;
walter76 1:75827d765e34 299
walter76 0:6d1742703713 300 return;
walter76 0:6d1742703713 301 }
walter76 0:6d1742703713 302
walter76 0:6d1742703713 303
walter76 1:75827d765e34 304 //---------------------------------------------------------------------------
walter76 1:75827d765e34 305 // Initialize the MAX7219
walter76 1:75827d765e34 306
walter76 1:75827d765e34 307 void Display_init(void)
walter76 1:75827d765e34 308 {
walter76 1:75827d765e34 309 uint8_t i;
walter76 1:75827d765e34 310 uint16_t mask;
walter76 1:75827d765e34 311 uint16_t data_to_send[6] = {SHUTDOWN, TURN_ON, DEC_MODE, BRIGHTNESS, SCAN_LIM, TEST};
walter76 1:75827d765e34 312 //{SHUTDOWN, TURN_ON, DEC_MODE, BRIGHTNESS, SCAN_LIM, TEST};
walter76 1:75827d765e34 313 for(i = 0; i <6; i++)
walter76 1:75827d765e34 314 {
walter76 1:75827d765e34 315 CS1 = 0;
walter76 1:75827d765e34 316
walter76 1:75827d765e34 317 for(mask = 0x8000; mask!= 0; mask>>= 1)
walter76 1:75827d765e34 318 {
walter76 1:75827d765e34 319 wait_us(DT);
walter76 1:75827d765e34 320 SCK = 0;
walter76 1:75827d765e34 321 if(mask & data_to_send[i])
walter76 1:75827d765e34 322 MOSI = 1;
walter76 1:75827d765e34 323 else
walter76 1:75827d765e34 324 MOSI = 0;
walter76 1:75827d765e34 325 wait_us(DT);
walter76 1:75827d765e34 326 SCK = 1;
walter76 1:75827d765e34 327 }
walter76 1:75827d765e34 328
walter76 1:75827d765e34 329 wait_us(DT);
walter76 1:75827d765e34 330 SCK = 0;
walter76 1:75827d765e34 331 wait_us(DT);
walter76 1:75827d765e34 332 CS1 = 1;
walter76 1:75827d765e34 333 }
walter76 1:75827d765e34 334
walter76 1:75827d765e34 335 return;
walter76 1:75827d765e34 336 }
walter76 1:75827d765e34 337
walter76 1:75827d765e34 338
walter76 1:75827d765e34 339 //---------------------------------------------------------------------------
walter76 1:75827d765e34 340 // Refresh the 6 digits of the main display
walter76 1:75827d765e34 341
walter76 1:75827d765e34 342 void Display_6D_write(uint8_t value)
walter76 1:75827d765e34 343 {
walter76 1:75827d765e34 344
walter76 1:75827d765e34 345 uint8_t digit;
walter76 1:75827d765e34 346 uint16_t mask, data_to_send;
walter76 1:75827d765e34 347 char TextString[6];
walter76 1:75827d765e34 348
walter76 1:75827d765e34 349 // int to string, then string to digits
walter76 1:75827d765e34 350
walter76 1:75827d765e34 351 sprintf(TextString, "%6d", value); // int to string
walter76 1:75827d765e34 352
walter76 1:75827d765e34 353 for(uint8_t i=0; i<6; i++)
walter76 1:75827d765e34 354 {
walter76 1:75827d765e34 355 if(TextString[i] == ' ') // blank empty digits
walter76 1:75827d765e34 356 Disp_Digit[i] = 0xFF;
walter76 1:75827d765e34 357 else
walter76 1:75827d765e34 358 Disp_Digit[i] = TextString[i]-'0';
walter76 1:75827d765e34 359 }
walter76 1:75827d765e34 360
walter76 1:75827d765e34 361 // write to chip
walter76 1:75827d765e34 362
walter76 1:75827d765e34 363 SCK = 0;
walter76 1:75827d765e34 364 wait_us(DT);
walter76 1:75827d765e34 365
walter76 1:75827d765e34 366 for(digit = 1; digit <7; digit++)
walter76 1:75827d765e34 367 {
walter76 1:75827d765e34 368 // each stream consists of digit address and data to show
Charles David Young 6:05201ecabb95 369 data_to_send = 7 - digit;
walter76 1:75827d765e34 370 data_to_send<<=8;
walter76 1:75827d765e34 371 data_to_send = data_to_send | Disp_Digit[digit-1];
walter76 1:75827d765e34 372
walter76 1:75827d765e34 373 CS1 = 0;
walter76 1:75827d765e34 374
walter76 1:75827d765e34 375 for(mask = 0x8000; mask!= 0; mask>>= 1)
walter76 1:75827d765e34 376 {
walter76 1:75827d765e34 377 wait_us(DT);
walter76 1:75827d765e34 378 SCK = 0;
walter76 1:75827d765e34 379 if(mask & data_to_send)
walter76 1:75827d765e34 380 MOSI = 1;
walter76 1:75827d765e34 381 else
walter76 1:75827d765e34 382 MOSI = 0;
walter76 1:75827d765e34 383
walter76 1:75827d765e34 384 wait_us(DT);
walter76 1:75827d765e34 385 SCK = 1;
walter76 1:75827d765e34 386 }
walter76 1:75827d765e34 387
walter76 1:75827d765e34 388 wait_us(DT);
walter76 1:75827d765e34 389 SCK = 0;
walter76 1:75827d765e34 390 wait_us(DT);
walter76 1:75827d765e34 391 CS1 = 1;
walter76 1:75827d765e34 392 }
walter76 1:75827d765e34 393
walter76 1:75827d765e34 394 return;
walter76 1:75827d765e34 395 }
walter76 1:75827d765e34 396
walter76 1:75827d765e34 397
walter76 1:75827d765e34 398 //---------------------------------------------------------------------------
walter76 1:75827d765e34 399 // Refresh the 2 digits of the gate display
walter76 1:75827d765e34 400
walter76 1:75827d765e34 401 void Display_2D_write(unsigned short value)
walter76 1:75827d765e34 402 {
walter76 1:75827d765e34 403
walter76 1:75827d765e34 404 uint8_t digit;
walter76 1:75827d765e34 405 uint16_t mask, data_to_send;
walter76 1:75827d765e34 406 char TextString[2];
walter76 1:75827d765e34 407
walter76 1:75827d765e34 408 // int to string, then string to digits
walter76 1:75827d765e34 409
walter76 1:75827d765e34 410 sprintf(TextString, "%2d", value); // int to string
walter76 1:75827d765e34 411
walter76 1:75827d765e34 412 if(TextString[0] == ' ') // blank empty digits
walter76 1:75827d765e34 413 Disp_Digit[7] = 0xFF;
walter76 1:75827d765e34 414 else
walter76 1:75827d765e34 415 Disp_Digit[7] = TextString[0] - '0';
walter76 1:75827d765e34 416
walter76 1:75827d765e34 417 Disp_Digit[6] = TextString[1] - '0';
walter76 1:75827d765e34 418
walter76 1:75827d765e34 419 // write to chip
walter76 1:75827d765e34 420
walter76 1:75827d765e34 421 SCK = 0;
walter76 1:75827d765e34 422 wait_us(DT);
walter76 1:75827d765e34 423
walter76 1:75827d765e34 424 for(digit = 7; digit <9; digit++)
walter76 1:75827d765e34 425 {
walter76 1:75827d765e34 426 // each stream consists of digit address and data to show
walter76 1:75827d765e34 427 data_to_send = digit;
walter76 1:75827d765e34 428 data_to_send<<=8;
walter76 1:75827d765e34 429 data_to_send = data_to_send | Disp_Digit[digit-1];
walter76 1:75827d765e34 430
walter76 1:75827d765e34 431 CS1 = 0;
walter76 1:75827d765e34 432
walter76 1:75827d765e34 433 for(mask = 0x8000; mask!= 0; mask>>= 1)
walter76 1:75827d765e34 434 {
walter76 1:75827d765e34 435 wait_us(DT);
walter76 1:75827d765e34 436 SCK = 0;
walter76 1:75827d765e34 437
walter76 1:75827d765e34 438 if(mask & data_to_send)
walter76 1:75827d765e34 439 MOSI = 1;
walter76 1:75827d765e34 440 else
walter76 1:75827d765e34 441 MOSI = 0;
walter76 1:75827d765e34 442
walter76 1:75827d765e34 443 wait_us(DT);
walter76 1:75827d765e34 444 SCK = 1;
walter76 1:75827d765e34 445 }
walter76 1:75827d765e34 446
walter76 1:75827d765e34 447 wait_us(DT);
walter76 1:75827d765e34 448 SCK = 0;
walter76 1:75827d765e34 449 wait_us(DT);
walter76 1:75827d765e34 450 CS1 = 1;
walter76 1:75827d765e34 451 }
walter76 1:75827d765e34 452
walter76 1:75827d765e34 453 return;
walter76 1:75827d765e34 454 }
walter76 1:75827d765e34 455
walter76 1:75827d765e34 456 //-------- END OF FILE --------------
walter76 1:75827d765e34 457 //==============================================================================
walter76 1:75827d765e34 458
walter76 1:75827d765e34 459
walter76 1:75827d765e34 460