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@10:f48cc6be5ae8, 2018-09-02 (annotated)

Committer:
Charles David Young
Date:
Sun Sep 02 18:12:59 2018 -0700
Revision:
10:f48cc6be5ae8
Parent:
7:9f975e00600c
Child:
11:6e15cc2b2328
consolidate logging

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
Charles David Young 7:9f975e00600c 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
walter76 1:75827d765e34 49 DigitalIn QEIPB (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 7:9f975e00600c 71 int WheelCurrent = 0;
Charles David Young 7:9f975e00600c 72 int WheelPrevious = 0;
Charles David Young 7:9f975e00600c 73
walter76 1:75827d765e34 74 I2C i2c(D4, D5); // I2C port
walter76 1:75827d765e34 75 Ticker Sec_Beat; // 1 second ticker
walter76 1:75827d765e34 76 Serial PC(USBTX, USBRX); // Virtual COM via USB (PC connection)
walter76 1:75827d765e34 77 Serial GPS(D1, D0); // Serial port for GPS module
walter76 0:6d1742703713 78
walter76 0:6d1742703713 79 // Global variables
walter76 1:75827d765e34 80 uint8_t Disp_Digit[8]; // used to manage 8-digits through MAX7219
walter76 1:75827d765e34 81 uint16_t Stream; // used to stream out serial data to MAX7219
walter76 1:75827d765e34 82 time_t seconds; // Real-Time Clock (RTC) timestamp
walter76 1:75827d765e34 83 unsigned int value = 0; // displayed value on the 6-digits of the display
walter76 1:75827d765e34 84 uint8_t gate = TGATE; // displayed value on the 2-digits display
walter76 1:75827d765e34 85 uint32_t Count1, Count2; // pulse counters (32-bit)
walter76 1:75827d765e34 86 char Text[40]=""; // used to send messages over the serial port
walter76 1:75827d765e34 87 uint8_t Disp_mode = 0x01, Disp_unit = 0xA0; // status of 1st row and 2nd rows of LEDs
kd5byb 4:b17c6556cf1f 88 bool Stopped = 0; // status of counting activity
charlesdavidyoung 5:4f90b458dbdf 89 bool StartStopPressed = 0;// status of counting activity
walter76 1:75827d765e34 90 double ADC_val; // used to read ADC value
walter76 0:6d1742703713 91
walter76 1:75827d765e34 92 // ----- Prototypes of routines (defined below the main) -------------------
walter76 1:75827d765e34 93 void Update(void); // periodically called by the ticker
walter76 1:75827d765e34 94 void Count1_up(void); // called every time an edge is detected on TRIG1 pin
walter76 1:75827d765e34 95 void Count2_up(void); // called every time an edge is detected on TRIG2 pin
walter76 1:75827d765e34 96 void Beep(void); // used to generate a short beep (buzzer)
walter76 1:75827d765e34 97 void LEDs_write(unsigned short); // write to 74HC595 (8x LEDs)
walter76 1:75827d765e34 98 void Display_init(void); // initialize MAX7219
walter76 1:75827d765e34 99 void Display_6D_write(uint8_t); // write to MAX7219 (Main 6-digits display)
walter76 1:75827d765e34 100 void Display_2D_write(unsigned short); // write to MAX7219 (Gate 2-digits display)
walter76 0:6d1742703713 101
walter76 0:6d1742703713 102 //==============================================================================
walter76 0:6d1742703713 103 //==============================================================================
walter76 0:6d1742703713 104
walter76 0:6d1742703713 105 int main()
walter76 0:6d1742703713 106 {
walter76 0:6d1742703713 107
walter76 1:75827d765e34 108 PC.baud(115200); // set baud-rate of virtual COM port (PC connection)
charlesdavidyoung 5:4f90b458dbdf 109 PC.printf("\nGEO COUNTER V1 2108");
walter76 1:75827d765e34 110 PC.printf(__DATE__);
walter76 1:75827d765e34 111 PC.printf(" ");
walter76 1:75827d765e34 112 PC.printf(__TIME__);
walter76 1:75827d765e34 113
walter76 2:ac0ed3d84d44 114 GPS.baud(9600); // set the baud-rate of the serial port dedicated to the GPS
walter76 0:6d1742703713 115
walter76 1:75827d765e34 116 CS1 = 1; // presets CS of MAX7219
walter76 1:75827d765e34 117 CS2 = 1; // preset CS of 74HC595
walter76 1:75827d765e34 118
charlesdavidyoung 5:4f90b458dbdf 119 Display_6D_write(543210);
walter76 1:75827d765e34 120 Display_2D_write(TGATE);
walter76 1:75827d765e34 121 Display_init(); // initialize MAX7219
walter76 0:6d1742703713 122
walter76 1:75827d765e34 123 // RTC is supposed to be loose time at power down (no backup battery)
walter76 1:75827d765e34 124 // An initialization is performed anyway
walter76 1:75827d765e34 125 set_time(0); // Set time
walter76 0:6d1742703713 126
walter76 1:75827d765e34 127 Wheel.reset(); // clear the variable associated to the encoder
walter76 1:75827d765e34 128
walter76 1:75827d765e34 129 PWM.period_ms(3); // set the PWM period
walter76 1:75827d765e34 130 PWM.write(0.8); // set the PWM duty-cycle
walter76 1:75827d765e34 131
walter76 1:75827d765e34 132 LEDs_write(0x00); // initialize LEDs (CPM and CNT1 on)
walter76 1:75827d765e34 133 Beep(); // initial beep
walter76 1:75827d765e34 134
walter76 1:75827d765e34 135 // set the 1 sec ticker to periodically call the Update() routine
walter76 1:75827d765e34 136 // NOTE: this is also the 1-sec time base for counters. A better approach
walter76 1:75827d765e34 137 // would replace the ticker with an interrupt from the RTC (to be implemented)
Charles David Young 3:23b0185c7e7b 138 Sec_Beat.attach_us(&Update, 1000000);
walter76 0:6d1742703713 139 //RTC::attach(&Update, RTC::Second);
walter76 1:75827d765e34 140 //RTC::detach(RTC::Second);
walter76 1:75827d765e34 141
walter76 1:75827d765e34 142 // main loop does nothing as all activities are interrupt driven
walter76 0:6d1742703713 143 while(1)
walter76 0:6d1742703713 144 {
walter76 2:ac0ed3d84d44 145 // dance (or drink a beer)
walter76 0:6d1742703713 146 }
walter76 0:6d1742703713 147 }
walter76 0:6d1742703713 148
walter76 0:6d1742703713 149
walter76 1:75827d765e34 150 //-------- END OF MAIN --------------
walter76 0:6d1742703713 151 //==============================================================================
walter76 0:6d1742703713 152
walter76 1:75827d765e34 153 // Definition of routines
walter76 1:75827d765e34 154
walter76 1:75827d765e34 155 //---------------------------------------------------------------------------
walter76 1:75827d765e34 156 // Update values to be displayed
Charles David Young 10:f48cc6be5ae8 157 void logToPC()
Charles David Young 10:f48cc6be5ae8 158 {
Charles David Young 10:f48cc6be5ae8 159 PC.printf("\nADC: %.02f", ADC_val);
Charles David Young 10:f48cc6be5ae8 160 PC.printf(Stopped ? " stopped" : " started");
Charles David Young 10:f48cc6be5ae8 161 // Timestamp to PC (debug)
Charles David Young 10:f48cc6be5ae8 162 seconds = time(NULL); // get current time
Charles David Young 10:f48cc6be5ae8 163 strftime(Text, 50, "%H:%M:%S", localtime(&seconds));
Charles David Young 10:f48cc6be5ae8 164 PC.printf(" RTC: %s, CNT1: %7d CNT2: %7d",Text, Count1, Count2);
Charles David Young 10:f48cc6be5ae8 165 PC.printf(" wheel %d", WheelCurrent);
Charles David Young 10:f48cc6be5ae8 166 }
walter76 1:75827d765e34 167
walter76 1:75827d765e34 168 void Update()
walter76 1:75827d765e34 169 {
Charles David Young 7:9f975e00600c 170 LEDs_write(LED_statuses[LED_status_index]);
Charles David Young 7:9f975e00600c 171
walter76 1:75827d765e34 172 ADC_val = KEYB.read(); // read voltage from keyboard
charlesdavidyoung 5:4f90b458dbdf 173 if ( (ADC_val<0.1) // START/STOP pushbutton pressed
charlesdavidyoung 5:4f90b458dbdf 174 && (!StartStopPressed))
charlesdavidyoung 5:4f90b458dbdf 175 {
charlesdavidyoung 5:4f90b458dbdf 176 StartStopPressed = true;
charlesdavidyoung 5:4f90b458dbdf 177 Stopped=!Stopped; // toggle status
charlesdavidyoung 5:4f90b458dbdf 178 }
charlesdavidyoung 5:4f90b458dbdf 179 else
charlesdavidyoung 5:4f90b458dbdf 180 StartStopPressed = false;
charlesdavidyoung 5:4f90b458dbdf 181
charlesdavidyoung 5:4f90b458dbdf 182 if((ADC_val>0.6)&&(ADC_val<0.7)) // CLEAR pushbutton pressed
charlesdavidyoung 5:4f90b458dbdf 183 {
walter76 1:75827d765e34 184 Count1 = 0; // clear counters
walter76 1:75827d765e34 185 Count2 = 0;
charlesdavidyoung 5:4f90b458dbdf 186 }
charlesdavidyoung 5:4f90b458dbdf 187
walter76 1:75827d765e34 188 if(Stopped)
walter76 1:75827d765e34 189 {
walter76 1:75827d765e34 190 // disable interrupts on TRIG1 and TRIG2
kd5byb 4:b17c6556cf1f 191
walter76 1:75827d765e34 192 TRIG1.rise(NULL);
walter76 1:75827d765e34 193 TRIG2.rise(NULL);
walter76 0:6d1742703713 194
walter76 1:75827d765e34 195 // show zero gate time
walter76 1:75827d765e34 196 gate = 0;
walter76 1:75827d765e34 197 Display_2D_write(gate);
walter76 0:6d1742703713 198
walter76 1:75827d765e34 199 // show selected content on main display
walter76 1:75827d765e34 200 value = (int)(Count1/TGATE);
walter76 1:75827d765e34 201 Display_6D_write(value); // refresh the main display
walter76 1:75827d765e34 202 }
walter76 0:6d1742703713 203
walter76 0:6d1742703713 204 else
walter76 0:6d1742703713 205 {
walter76 1:75827d765e34 206 // Enable interrupts on rising edge of digital inputs TRIG1 & TRIG2
walter76 1:75827d765e34 207 TRIG1.rise(&Count1_up);
walter76 1:75827d765e34 208 TRIG2.rise(&Count2_up);
walter76 1:75827d765e34 209
walter76 1:75827d765e34 210 if(gate==0) // show the counter value at the end of the gate time
walter76 1:75827d765e34 211 {
walter76 1:75827d765e34 212 value = (int)(Count1/TGATE);
walter76 0:6d1742703713 213
walter76 1:75827d765e34 214 Display_6D_write(value); // refresh the main display
walter76 1:75827d765e34 215
walter76 1:75827d765e34 216 Count1 = 0; // clear both counters
walter76 1:75827d765e34 217 Count2 = 0;
walter76 1:75827d765e34 218 gate = TGATE;// and reload the gate time
walter76 1:75827d765e34 219
walter76 1:75827d765e34 220 }
walter76 1:75827d765e34 221
walter76 1:75827d765e34 222 Display_2D_write(gate); // show gate time countdown
walter76 1:75827d765e34 223 gate--;
walter76 0:6d1742703713 224 }
walter76 1:75827d765e34 225
Charles David Young 7:9f975e00600c 226 WheelCurrent = int(Wheel.getPulses());
Charles David Young 7:9f975e00600c 227 if (WheelCurrent > WheelPrevious)
Charles David Young 7:9f975e00600c 228 LED_status_index++ | sizeof(LED_statuses);
Charles David Young 7:9f975e00600c 229 else
Charles David Young 7:9f975e00600c 230 if (WheelCurrent < WheelPrevious)
Charles David Young 7:9f975e00600c 231 LED_status_index-- | sizeof(LED_statuses);
Charles David Young 7:9f975e00600c 232 WheelPrevious = WheelCurrent;
Charles David Young 7:9f975e00600c 233
Charles David Young 10:f48cc6be5ae8 234 logToPC();
walter76 0:6d1742703713 235 return;
walter76 0:6d1742703713 236 }
walter76 0:6d1742703713 237
walter76 0:6d1742703713 238 //---------------------------------------------------------------------------
walter76 1:75827d765e34 239 // Increment CNT1 every time a rising edge is detected on TRIG1 (interrupt)
walter76 1:75827d765e34 240
walter76 1:75827d765e34 241 void Count1_up(void)
walter76 1:75827d765e34 242 {
walter76 1:75827d765e34 243 Count1++;
walter76 1:75827d765e34 244 return;
walter76 1:75827d765e34 245 }
walter76 1:75827d765e34 246
walter76 1:75827d765e34 247
walter76 1:75827d765e34 248 //---------------------------------------------------------------------------
walter76 1:75827d765e34 249 // Increment CNT1 every time a rising edge is detected on TRIG2 (interrupt)
walter76 1:75827d765e34 250
walter76 1:75827d765e34 251 void Count2_up(void)
walter76 1:75827d765e34 252 {
walter76 1:75827d765e34 253 Count2++;
walter76 1:75827d765e34 254 return;
walter76 1:75827d765e34 255 }
walter76 1:75827d765e34 256
walter76 1:75827d765e34 257
walter76 1:75827d765e34 258 //---------------------------------------------------------------------------
walter76 1:75827d765e34 259 //Generates a short beep via BUZZ
walter76 1:75827d765e34 260
walter76 1:75827d765e34 261 void Beep(void)
walter76 1:75827d765e34 262 {
walter76 1:75827d765e34 263 BUZZ = 1; // turn-on the buzzer
walter76 1:75827d765e34 264 wait(0.3); // wait
walter76 1:75827d765e34 265 BUZZ = 0; // turn-off the buzzer
walter76 0:6d1742703713 266 return;
walter76 0:6d1742703713 267 }
walter76 0:6d1742703713 268
walter76 0:6d1742703713 269
walter76 0:6d1742703713 270 //---------------------------------------------------------------------------
walter76 1:75827d765e34 271 //Write to 74HC595 (LEDs) - Take care to avoid conflict with MAX7219
walter76 1:75827d765e34 272
walter76 1:75827d765e34 273 void LEDs_write(unsigned short data_val)
walter76 1:75827d765e34 274 {
walter76 1:75827d765e34 275 // Update 74HC595 shift registers
walter76 1:75827d765e34 276 unsigned short mask;
walter76 1:75827d765e34 277
walter76 1:75827d765e34 278 SCK = 0;
walter76 1:75827d765e34 279 wait_us(DT);
walter76 1:75827d765e34 280 CS2 = 0;
walter76 1:75827d765e34 281
walter76 1:75827d765e34 282 for(mask = 0x80; mask!= 0; mask>>= 1)
walter76 1:75827d765e34 283 {
walter76 1:75827d765e34 284 wait_us(DT);
walter76 1:75827d765e34 285 SCK = 0;
walter76 1:75827d765e34 286 if(mask & data_val)
walter76 1:75827d765e34 287 MOSI = 0;
walter76 1:75827d765e34 288 else
walter76 1:75827d765e34 289 MOSI = 1;
walter76 1:75827d765e34 290 wait_us(DT);
walter76 1:75827d765e34 291 SCK = 1;
walter76 1:75827d765e34 292 }
walter76 1:75827d765e34 293
walter76 1:75827d765e34 294 SCK = 0;
walter76 1:75827d765e34 295 wait_us(DT);
walter76 1:75827d765e34 296 CS2 = 1;
walter76 1:75827d765e34 297
walter76 0:6d1742703713 298 return;
walter76 0:6d1742703713 299 }
walter76 0:6d1742703713 300
walter76 0:6d1742703713 301
walter76 1:75827d765e34 302 //---------------------------------------------------------------------------
walter76 1:75827d765e34 303 // Initialize the MAX7219
walter76 1:75827d765e34 304
walter76 1:75827d765e34 305 void Display_init(void)
walter76 1:75827d765e34 306 {
walter76 1:75827d765e34 307 uint8_t i;
walter76 1:75827d765e34 308 uint16_t mask;
walter76 1:75827d765e34 309 uint16_t data_to_send[6] = {SHUTDOWN, TURN_ON, DEC_MODE, BRIGHTNESS, SCAN_LIM, TEST};
walter76 1:75827d765e34 310 //{SHUTDOWN, TURN_ON, DEC_MODE, BRIGHTNESS, SCAN_LIM, TEST};
walter76 1:75827d765e34 311 for(i = 0; i <6; i++)
walter76 1:75827d765e34 312 {
walter76 1:75827d765e34 313 CS1 = 0;
walter76 1:75827d765e34 314
walter76 1:75827d765e34 315 for(mask = 0x8000; mask!= 0; mask>>= 1)
walter76 1:75827d765e34 316 {
walter76 1:75827d765e34 317 wait_us(DT);
walter76 1:75827d765e34 318 SCK = 0;
walter76 1:75827d765e34 319 if(mask & data_to_send[i])
walter76 1:75827d765e34 320 MOSI = 1;
walter76 1:75827d765e34 321 else
walter76 1:75827d765e34 322 MOSI = 0;
walter76 1:75827d765e34 323 wait_us(DT);
walter76 1:75827d765e34 324 SCK = 1;
walter76 1:75827d765e34 325 }
walter76 1:75827d765e34 326
walter76 1:75827d765e34 327 wait_us(DT);
walter76 1:75827d765e34 328 SCK = 0;
walter76 1:75827d765e34 329 wait_us(DT);
walter76 1:75827d765e34 330 CS1 = 1;
walter76 1:75827d765e34 331 }
walter76 1:75827d765e34 332
walter76 1:75827d765e34 333 return;
walter76 1:75827d765e34 334 }
walter76 1:75827d765e34 335
walter76 1:75827d765e34 336
walter76 1:75827d765e34 337 //---------------------------------------------------------------------------
walter76 1:75827d765e34 338 // Refresh the 6 digits of the main display
walter76 1:75827d765e34 339
walter76 1:75827d765e34 340 void Display_6D_write(uint8_t value)
walter76 1:75827d765e34 341 {
walter76 1:75827d765e34 342
walter76 1:75827d765e34 343 uint8_t digit;
walter76 1:75827d765e34 344 uint16_t mask, data_to_send;
walter76 1:75827d765e34 345 char TextString[6];
walter76 1:75827d765e34 346
walter76 1:75827d765e34 347 // int to string, then string to digits
walter76 1:75827d765e34 348
walter76 1:75827d765e34 349 sprintf(TextString, "%6d", value); // int to string
walter76 1:75827d765e34 350
walter76 1:75827d765e34 351 for(uint8_t i=0; i<6; i++)
walter76 1:75827d765e34 352 {
walter76 1:75827d765e34 353 if(TextString[i] == ' ') // blank empty digits
walter76 1:75827d765e34 354 Disp_Digit[i] = 0xFF;
walter76 1:75827d765e34 355 else
walter76 1:75827d765e34 356 Disp_Digit[i] = TextString[i]-'0';
walter76 1:75827d765e34 357 }
walter76 1:75827d765e34 358
walter76 1:75827d765e34 359 // write to chip
walter76 1:75827d765e34 360
walter76 1:75827d765e34 361 SCK = 0;
walter76 1:75827d765e34 362 wait_us(DT);
walter76 1:75827d765e34 363
walter76 1:75827d765e34 364 for(digit = 1; digit <7; digit++)
walter76 1:75827d765e34 365 {
walter76 1:75827d765e34 366 // each stream consists of digit address and data to show
Charles David Young 6:05201ecabb95 367 data_to_send = 7 - digit;
walter76 1:75827d765e34 368 data_to_send<<=8;
walter76 1:75827d765e34 369 data_to_send = data_to_send | Disp_Digit[digit-1];
walter76 1:75827d765e34 370
walter76 1:75827d765e34 371 CS1 = 0;
walter76 1:75827d765e34 372
walter76 1:75827d765e34 373 for(mask = 0x8000; mask!= 0; mask>>= 1)
walter76 1:75827d765e34 374 {
walter76 1:75827d765e34 375 wait_us(DT);
walter76 1:75827d765e34 376 SCK = 0;
walter76 1:75827d765e34 377 if(mask & data_to_send)
walter76 1:75827d765e34 378 MOSI = 1;
walter76 1:75827d765e34 379 else
walter76 1:75827d765e34 380 MOSI = 0;
walter76 1:75827d765e34 381
walter76 1:75827d765e34 382 wait_us(DT);
walter76 1:75827d765e34 383 SCK = 1;
walter76 1:75827d765e34 384 }
walter76 1:75827d765e34 385
walter76 1:75827d765e34 386 wait_us(DT);
walter76 1:75827d765e34 387 SCK = 0;
walter76 1:75827d765e34 388 wait_us(DT);
walter76 1:75827d765e34 389 CS1 = 1;
walter76 1:75827d765e34 390 }
walter76 1:75827d765e34 391
walter76 1:75827d765e34 392 return;
walter76 1:75827d765e34 393 }
walter76 1:75827d765e34 394
walter76 1:75827d765e34 395
walter76 1:75827d765e34 396 //---------------------------------------------------------------------------
walter76 1:75827d765e34 397 // Refresh the 2 digits of the gate display
walter76 1:75827d765e34 398
walter76 1:75827d765e34 399 void Display_2D_write(unsigned short value)
walter76 1:75827d765e34 400 {
walter76 1:75827d765e34 401
walter76 1:75827d765e34 402 uint8_t digit;
walter76 1:75827d765e34 403 uint16_t mask, data_to_send;
walter76 1:75827d765e34 404 char TextString[2];
walter76 1:75827d765e34 405
walter76 1:75827d765e34 406 // int to string, then string to digits
walter76 1:75827d765e34 407
walter76 1:75827d765e34 408 sprintf(TextString, "%2d", value); // int to string
walter76 1:75827d765e34 409
walter76 1:75827d765e34 410 if(TextString[0] == ' ') // blank empty digits
walter76 1:75827d765e34 411 Disp_Digit[7] = 0xFF;
walter76 1:75827d765e34 412 else
walter76 1:75827d765e34 413 Disp_Digit[7] = TextString[0] - '0';
walter76 1:75827d765e34 414
walter76 1:75827d765e34 415 Disp_Digit[6] = TextString[1] - '0';
walter76 1:75827d765e34 416
walter76 1:75827d765e34 417 // write to chip
walter76 1:75827d765e34 418
walter76 1:75827d765e34 419 SCK = 0;
walter76 1:75827d765e34 420 wait_us(DT);
walter76 1:75827d765e34 421
walter76 1:75827d765e34 422 for(digit = 7; digit <9; digit++)
walter76 1:75827d765e34 423 {
walter76 1:75827d765e34 424 // each stream consists of digit address and data to show
walter76 1:75827d765e34 425 data_to_send = digit;
walter76 1:75827d765e34 426 data_to_send<<=8;
walter76 1:75827d765e34 427 data_to_send = data_to_send | Disp_Digit[digit-1];
walter76 1:75827d765e34 428
walter76 1:75827d765e34 429 CS1 = 0;
walter76 1:75827d765e34 430
walter76 1:75827d765e34 431 for(mask = 0x8000; mask!= 0; mask>>= 1)
walter76 1:75827d765e34 432 {
walter76 1:75827d765e34 433 wait_us(DT);
walter76 1:75827d765e34 434 SCK = 0;
walter76 1:75827d765e34 435
walter76 1:75827d765e34 436 if(mask & data_to_send)
walter76 1:75827d765e34 437 MOSI = 1;
walter76 1:75827d765e34 438 else
walter76 1:75827d765e34 439 MOSI = 0;
walter76 1:75827d765e34 440
walter76 1:75827d765e34 441 wait_us(DT);
walter76 1:75827d765e34 442 SCK = 1;
walter76 1:75827d765e34 443 }
walter76 1:75827d765e34 444
walter76 1:75827d765e34 445 wait_us(DT);
walter76 1:75827d765e34 446 SCK = 0;
walter76 1:75827d765e34 447 wait_us(DT);
walter76 1:75827d765e34 448 CS1 = 1;
walter76 1:75827d765e34 449 }
walter76 1:75827d765e34 450
walter76 1:75827d765e34 451 return;
walter76 1:75827d765e34 452 }
walter76 1:75827d765e34 453
walter76 1:75827d765e34 454 //-------- END OF FILE --------------
walter76 1:75827d765e34 455 //==============================================================================
walter76 1:75827d765e34 456
walter76 1:75827d765e34 457
walter76 1:75827d765e34 458