Yucheng Yang / Mbed 2 deprecated xcminilab4

1

Dependencies:   mbed N5110

main.cpp@0:f123c8d6edd2, 2018-12-11 (annotated)

Committer:
C41x140
Date:
Tue Dec 11 14:11:22 2018 +0000
Revision:
0:f123c8d6edd2
xiangcong vision1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
C41x140 0:f123c8d6edd2 1 // This file is used to set the current time to the buffer
C41x140 0:f123c8d6edd2 2
C41x140 0:f123c8d6edd2 3 #include "mbed.h"
C41x140 0:f123c8d6edd2 4 #include "N5110.h"
C41x140 0:f123c8d6edd2 5
C41x140 0:f123c8d6edd2 6 BusOut leds(LED1,LED2,LED3,LED4);
C41x140 0:f123c8d6edd2 7
C41x140 0:f123c8d6edd2 8 // VCC,SCE,RST,D/C,MOSI,SCLK,LED
C41x140 0:f123c8d6edd2 9 N5110 lcd(p7,p8,p9,p10,p11,p13,p21); // LPC1768 - pwr from GPIO
C41x140 0:f123c8d6edd2 10 //N5110 lcd(p8,p9,p10,p11,p13,p21); // LPC1768 - powered from +3V3 - JP1 in 2/3 position
C41x140 0:f123c8d6edd2 11 //N5110 lcd(PTC9,PTC0,PTC7,PTD2,PTD1,PTC11); // K64F - pwr from 3V3
C41x140 0:f123c8d6edd2 12
C41x140 0:f123c8d6edd2 13 //------------------------TMP102 START-----------------
C41x140 0:f123c8d6edd2 14 // addresses for ADD0 connected to GND
C41x140 0:f123c8d6edd2 15 #define TMP102_ADD 0x48
C41x140 0:f123c8d6edd2 16 #define TMP102_R_ADD 0x91
C41x140 0:f123c8d6edd2 17 #define TMP102_W_ADD 0x90
C41x140 0:f123c8d6edd2 18
C41x140 0:f123c8d6edd2 19 // register addresses
C41x140 0:f123c8d6edd2 20 #define TEMP_REG 0x00
C41x140 0:f123c8d6edd2 21 #define CONFIG_REG 0x01
C41x140 0:f123c8d6edd2 22 #define THIGH_REG 0x02
C41x140 0:f123c8d6edd2 23 #define TLOW_REG 0x03
C41x140 0:f123c8d6edd2 24
C41x140 0:f123c8d6edd2 25
C41x140 0:f123c8d6edd2 26 I2C tmp102(p28,p27); // SDA, SCL
C41x140 0:f123c8d6edd2 27
C41x140 0:f123c8d6edd2 28
C41x140 0:f123c8d6edd2 29 // hang in infinite loop flashing error code
C41x140 0:f123c8d6edd2 30 void error(int code)
C41x140 0:f123c8d6edd2 31 {
C41x140 0:f123c8d6edd2 32 while(1) {
C41x140 0:f123c8d6edd2 33 leds = 0;
C41x140 0:f123c8d6edd2 34 wait(0.25);
C41x140 0:f123c8d6edd2 35 leds = code;
C41x140 0:f123c8d6edd2 36 wait(0.25);
C41x140 0:f123c8d6edd2 37 }
C41x140 0:f123c8d6edd2 38 }
C41x140 0:f123c8d6edd2 39
C41x140 0:f123c8d6edd2 40 void initTMP102()
C41x140 0:f123c8d6edd2 41 {
C41x140 0:f123c8d6edd2 42 tmp102.frequency(400000); // set bus speed to 400 kHz
C41x140 0:f123c8d6edd2 43 int ack; // used to store acknowledgement bit
C41x140 0:f123c8d6edd2 44 char data[2]; // array for data
C41x140 0:f123c8d6edd2 45 char reg = CONFIG_REG; // register address
C41x140 0:f123c8d6edd2 46 //////// Read current status of configuration register ///////
C41x140 0:f123c8d6edd2 47 ack = tmp102.write(TMP102_W_ADD,&reg,1); // send the slave write address and the configuration register address
C41x140 0:f123c8d6edd2 48 if (ack)
C41x140 0:f123c8d6edd2 49 error(1); // if we don't receive acknowledgement, flash error message
C41x140 0:f123c8d6edd2 50 ack = tmp102.read(TMP102_R_ADD,data,2); // read default 2 bytes from configuration register and store in buffer
C41x140 0:f123c8d6edd2 51 if (ack)
C41x140 0:f123c8d6edd2 52 error(2); // if we don't receive acknowledgement, flash error message
C41x140 0:f123c8d6edd2 53 ///////// Configure the register //////////
C41x140 0:f123c8d6edd2 54 // set conversion rate to 1 Hz
C41x140 0:f123c8d6edd2 55 data[1] |= (1 << 6); // set bit 6
C41x140 0:f123c8d6edd2 56 data[1] &= ~(1 << 7); // clear bit 7
C41x140 0:f123c8d6edd2 57 //////// Send the configured register to the slave ////////////
C41x140 0:f123c8d6edd2 58 char tx_data[3] = {reg,data[0],data[1]}; // create 3-byte packet for writing (p12 datasheet)
C41x140 0:f123c8d6edd2 59 ack = tmp102.write(TMP102_W_ADD,tx_data,3); // send the slave write address, config reg address and contents
C41x140 0:f123c8d6edd2 60 if (ack)
C41x140 0:f123c8d6edd2 61 error(3); // if we don't receive acknowledgement, flash error message
C41x140 0:f123c8d6edd2 62 }
C41x140 0:f123c8d6edd2 63
C41x140 0:f123c8d6edd2 64 float getTemperature()
C41x140 0:f123c8d6edd2 65 {
C41x140 0:f123c8d6edd2 66 int ack; // used to store acknowledgement bit
C41x140 0:f123c8d6edd2 67 char data[2]; // array for data
C41x140 0:f123c8d6edd2 68 char reg = TEMP_REG; // temperature register address
C41x140 0:f123c8d6edd2 69 ack = tmp102.write(TMP102_W_ADD,&reg,1); // send temperature register address
C41x140 0:f123c8d6edd2 70 if (ack)
C41x140 0:f123c8d6edd2 71 error(5); // if we don't receive acknowledgement, flash error message
C41x140 0:f123c8d6edd2 72 ack = tmp102.read(TMP102_R_ADD,data,2); // read 2 bytes from temperature register and store in array
C41x140 0:f123c8d6edd2 73 if (ack)
C41x140 0:f123c8d6edd2 74 error(6); // if we don't receive acknowledgement, flash error message
C41x140 0:f123c8d6edd2 75 int temperature = (data[0] << 4) | (data[1] >> 4);
C41x140 0:f123c8d6edd2 76 return temperature*0.0625;
C41x140 0:f123c8d6edd2 77 }
C41x140 0:f123c8d6edd2 78
C41x140 0:f123c8d6edd2 79 //--------------------------TMP102 END-----------------------
C41x140 0:f123c8d6edd2 80
C41x140 0:f123c8d6edd2 81 void setTime(); // function to set the UNIX time
C41x140 0:f123c8d6edd2 82
C41x140 0:f123c8d6edd2 83 //--------------------------set time-----------------------
C41x140 0:f123c8d6edd2 84 void setTime() {
C41x140 0:f123c8d6edd2 85 int year=2018;
C41x140 0:f123c8d6edd2 86 int mon=12;
C41x140 0:f123c8d6edd2 87 int day=11;
C41x140 0:f123c8d6edd2 88 int hour=14;
C41x140 0:f123c8d6edd2 89 int min=0;
C41x140 0:f123c8d6edd2 90 int sec=0;
C41x140 0:f123c8d6edd2 91
C41x140 0:f123c8d6edd2 92 struct tm timeinfo;
C41x140 0:f123c8d6edd2 93 timeinfo.tm_year=year-1900;
C41x140 0:f123c8d6edd2 94 timeinfo.tm_mon=mon-1;
C41x140 0:f123c8d6edd2 95 timeinfo.tm_mday=day;
C41x140 0:f123c8d6edd2 96 timeinfo.tm_hour=hour;
C41x140 0:f123c8d6edd2 97 timeinfo.tm_min=min;
C41x140 0:f123c8d6edd2 98 timeinfo.tm_sec=sec;
C41x140 0:f123c8d6edd2 99
C41x140 0:f123c8d6edd2 100 // update the time
C41x140 0:f123c8d6edd2 101 time_t current=mktime(&timeinfo);
C41x140 0:f123c8d6edd2 102 set_time(current);
C41x140 0:f123c8d6edd2 103 }
C41x140 0:f123c8d6edd2 104 //-------------------------set time end--------------------
C41x140 0:f123c8d6edd2 105
C41x140 0:f123c8d6edd2 106 int main()
C41x140 0:f123c8d6edd2 107 {
C41x140 0:f123c8d6edd2 108
C41x140 0:f123c8d6edd2 109 initTMP102(); // initial TMP102
C41x140 0:f123c8d6edd2 110
C41x140 0:f123c8d6edd2 111 // first need to initialise display
C41x140 0:f123c8d6edd2 112 lcd.init();
C41x140 0:f123c8d6edd2 113
C41x140 0:f123c8d6edd2 114 // change set contrast in range 0.0 to 1.0
C41x140 0:f123c8d6edd2 115 // 0.5 appears to be a good starting point
C41x140 0:f123c8d6edd2 116 lcd.setContrast(0.5);
C41x140 0:f123c8d6edd2 117
C41x140 0:f123c8d6edd2 118
C41x140 0:f123c8d6edd2 119 char buffert[30]; // buffer used to store time string
C41x140 0:f123c8d6edd2 120 char bufferd[30]; // buffer used to store date string
C41x140 0:f123c8d6edd2 121
C41x140 0:f123c8d6edd2 122
C41x140 0:f123c8d6edd2 123 setTime(); // initialise time to 1st January 1970
C41x140 0:f123c8d6edd2 124
C41x140 0:f123c8d6edd2 125
C41x140 0:f123c8d6edd2 126
C41x140 0:f123c8d6edd2 127
C41x140 0:f123c8d6edd2 128 while(1) {
C41x140 0:f123c8d6edd2 129
C41x140 0:f123c8d6edd2 130 // these are default settings so not strictly needed
C41x140 0:f123c8d6edd2 131 lcd.normalMode(); // normal colour mode
C41x140 0:f123c8d6edd2 132 lcd.setBrightness(0.5); // put LED backlight on 50%
C41x140 0:f123c8d6edd2 133
C41x140 0:f123c8d6edd2 134 lcd.clear();
C41x140 0:f123c8d6edd2 135
C41x140 0:f123c8d6edd2 136 time_t seconds = time(NULL); // get current time
C41x140 0:f123c8d6edd2 137 // format time into a string (time and date)
C41x140 0:f123c8d6edd2 138 strftime(buffert, 30 , "%X", localtime(&seconds));
C41x140 0:f123c8d6edd2 139 strftime(bufferd, 30 , "%F", localtime(&seconds));
C41x140 0:f123c8d6edd2 140 // print over serial
C41x140 0:f123c8d6edd2 141
C41x140 0:f123c8d6edd2 142 wait(1.0); // delay for a second
C41x140 0:f123c8d6edd2 143
C41x140 0:f123c8d6edd2 144 // clear buffer at start of every loop
C41x140 0:f123c8d6edd2 145 // can directly print strings at specified co-ordinates (must be less than 84 pixels to fit on display)
C41x140 0:f123c8d6edd2 146 lcd.printString("Hello, Xiang!",0,0);
C41x140 0:f123c8d6edd2 147
C41x140 0:f123c8d6edd2 148 char buffer[14]; // each character is 6 pixels wide, screen is 84 pixels (84/6 = 14)
C41x140 0:f123c8d6edd2 149 // so can display a string of a maximum 14 characters in length
C41x140 0:f123c8d6edd2 150 // or create formatted strings - ensure they aren't more than 14 characters long
C41x140 0:f123c8d6edd2 151
C41x140 0:f123c8d6edd2 152 float temperature = getTemperature(); // temperature from TMP102
C41x140 0:f123c8d6edd2 153 int temp = ceil(temperature);
C41x140 0:f123c8d6edd2 154 //int temp_test = 27;
C41x140 0:f123c8d6edd2 155
C41x140 0:f123c8d6edd2 156 //int length = sprintf(buffer,"T = %d C",temp_test); // print formatted data to buffer
C41x140 0:f123c8d6edd2 157 int length = sprintf(buffer,"T = %2d C",temp); // print formatted data to buffer
C41x140 0:f123c8d6edd2 158 // it is important the format specifier ensures the length will fit in the buffer
C41x140 0:f123c8d6edd2 159 if (length <= 14) // if string will fit on display (assuming printing at x=0)
C41x140 0:f123c8d6edd2 160 lcd.printString(buffer,0,1); // display on screen
C41x140 0:f123c8d6edd2 161
C41x140 0:f123c8d6edd2 162 lcd.printString(buffert, 0, 2);
C41x140 0:f123c8d6edd2 163 lcd.printString(bufferd, 0, 3);
C41x140 0:f123c8d6edd2 164
C41x140 0:f123c8d6edd2 165 lcd.refresh();
C41x140 0:f123c8d6edd2 166 }
C41x140 0:f123c8d6edd2 167 }