Richard Finn / Mbed 2 deprecated ATT_Cellular_IOT_Button

A simple project for sending button input up to AT&T Flow

Dependencies:   FXOS8700CQ MODSERIAL mbed

For instructions on using this program, see the AT&T Starter Kit tutorial on it.

main.cpp@72:0afdd141157c, 2016-08-12 (annotated)

Committer:
rfinn
Date:
Fri Aug 12 21:47:22 2016 +0000
Revision:
72:0afdd141157c
Parent:
71:bcbc072b85e1 
updated comment

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rfinn 68:d38834307b17 1 #include "mbed.h"
JMF 0:9d5134074d84 2 #include <cctype>
JMF 0:9d5134074d84 3 #include <string>
JMF 2:0e2ef866af95 4 #include "config_me.h"
stefanrousseau 61:f6b93129f954 5 #include "cell_modem.h"
stefanrousseau 11:e6602513730f 6 #include "hardware.h"
stefanrousseau 11:e6602513730f 7
stefanrousseau 61:f6b93129f954 8 I2C i2c(PTC11, PTC10); //SDA, SCL -- define the I2C pins being used
stefanrousseau 56:cb42ff383dab 9 MODSERIAL pc(USBTX, USBRX, 256, 256); // tx, rx with default tx, rx buffer sizes
stefanrousseau 63:90d7c69993cd 10 MODSERIAL mdm(PTD3, PTD2, 4096, 4096);
stefanrousseau 16:17c5916f2d12 11 DigitalOut led_green(LED_GREEN);
stefanrousseau 16:17c5916f2d12 12 DigitalOut led_red(LED_RED);
stefanrousseau 16:17c5916f2d12 13 DigitalOut led_blue(LED_BLUE);
JMF 0:9d5134074d84 14
rfinn 68:d38834307b17 15 // interrupts for buttons
rfinn 68:d38834307b17 16 InterruptIn sw3(SW3);
rfinn 68:d38834307b17 17 InterruptIn sw2(SW2);
JMF 0:9d5134074d84 18
rfinn 68:d38834307b17 19 // flag - must be volatile as changes within ISR
rfinn 68:d38834307b17 20 // g_ prefix makes it easier to distinguish it as global
rfinn 68:d38834307b17 21 volatile int g_sw3_flag = 0;
rfinn 68:d38834307b17 22 volatile int g_sw2_flag = 0;
rfinn 68:d38834307b17 23
rfinn 68:d38834307b17 24 // SW2 event-triggered interrupt
rfinn 71:bcbc072b85e1 25 // ISR = interrupt service routine
rfinn 71:bcbc072b85e1 26 // down = button was pushed down/falling
rfinn 71:bcbc072b85e1 27 // up = button was released/rising
rfinn 68:d38834307b17 28 void sw2_isr_down()
stefanrousseau 3:26b3cc155f39 29 {
rfinn 68:d38834307b17 30 g_sw2_flag = 1; // set flag in ISR
rfinn 68:d38834307b17 31 }
stefanrousseau 12:7c94ec5069dc 32
rfinn 68:d38834307b17 33 void sw2_isr_up()
stefanrousseau 3:26b3cc155f39 34 {
rfinn 68:d38834307b17 35 g_sw2_flag = 0;
rfinn 68:d38834307b17 36 }
rfinn 68:d38834307b17 37
rfinn 68:d38834307b17 38 // SW3 event-triggered interrupt
rfinn 68:d38834307b17 39 void sw3_isr_down()
rfinn 68:d38834307b17 40 {
rfinn 68:d38834307b17 41 g_sw3_flag = 1; // set flag in ISR
rfinn 68:d38834307b17 42 }
rfinn 68:d38834307b17 43
rfinn 68:d38834307b17 44 void sw3_isr_up()
stefanrousseau 3:26b3cc155f39 45 {
rfinn 68:d38834307b17 46 g_sw3_flag = 0;
rfinn 68:d38834307b17 47 }
rfinn 68:d38834307b17 48
rfinn 68:d38834307b17 49 void GenerateModemString(char * modem_string, char btn1, char btn2)
rfinn 68:d38834307b17 50 {
rfinn 68:d38834307b17 51 sprintf(modem_string, "serial:%s button1:%c button2:%c\r\n",
rfinn 68:d38834307b17 52 M2X_DEVICE_SERIAL, btn1, btn2
rfinn 68:d38834307b17 53 );
rfinn 70:e25fe7e5488a 54
rfinn 70:e25fe7e5488a 55 // HTTP method
rfinn 70:e25fe7e5488a 56 /*sprintf(modem_string, "GET %s%s?serial=%s&button1=%c&button2=%c %s%s\r\n\r\n",
rfinn 70:e25fe7e5488a 57 FLOW_BASE_PATH, FLOW_INPUT_NAME, M2X_DEVICE_NAME,
rfinn 70:e25fe7e5488a 58 btn1, btn2,
rfinn 70:e25fe7e5488a 59 FLOW_URL_TYPE, MY_SERVER_NAME); */
rfinn 70:e25fe7e5488a 60
rfinn 68:d38834307b17 61 } //GenerateModemString
rfinn 68:d38834307b17 62
stefanrousseau 3:26b3cc155f39 63
stefanrousseau 16:17c5916f2d12 64 //********************************************************************************************************************************************
stefanrousseau 16:17c5916f2d12 65 //* Set the RGB LED's Color
rfinn 68:d38834307b17 66 //* LED Color 0=Off to 7=White. 3 bits represent BGR (bit0=Red, bit1=Green, bit2=Blue)
stefanrousseau 16:17c5916f2d12 67 //********************************************************************************************************************************************
stefanrousseau 16:17c5916f2d12 68 void SetLedColor(unsigned char ucColor)
stefanrousseau 16:17c5916f2d12 69 {
stefanrousseau 16:17c5916f2d12 70 //Note that when an LED is on, you write a 0 to it:
stefanrousseau 16:17c5916f2d12 71 led_red = !(ucColor & 0x1); //bit 0
stefanrousseau 16:17c5916f2d12 72 led_green = !(ucColor & 0x2); //bit 1
stefanrousseau 16:17c5916f2d12 73 led_blue = !(ucColor & 0x4); //bit 2
stefanrousseau 16:17c5916f2d12 74 } //SetLedColor()
stefanrousseau 16:17c5916f2d12 75
stefanrousseau 16:17c5916f2d12 76 //********************************************************************************************************************************************
rfinn 68:d38834307b17 77 //* Process the JSON response. In this example we are only extracting a LED color.
stefanrousseau 16:17c5916f2d12 78 //********************************************************************************************************************************************
stefanrousseau 16:17c5916f2d12 79 bool parse_JSON(char* json_string)
stefanrousseau 16:17c5916f2d12 80 {
stefanrousseau 16:17c5916f2d12 81 char* beginquote;
stefanrousseau 16:17c5916f2d12 82 char token[] = "\"LED\":\"";
stefanrousseau 16:17c5916f2d12 83 beginquote = strstr(json_string, token );
rfinn 68:d38834307b17 84 if ((beginquote != 0)) {
stefanrousseau 16:17c5916f2d12 85 char cLedColor = beginquote[strlen(token)];
stefanrousseau 64:09004cd610df 86 PRINTF(GRN "LED Found : %c" DEF "\r\n", cLedColor);
rfinn 68:d38834307b17 87 switch(cLedColor) {
rfinn 68:d38834307b17 88 case 'O': {
rfinn 68:d38834307b17 89 //Off
stefanrousseau 16:17c5916f2d12 90 SetLedColor(0);
stefanrousseau 16:17c5916f2d12 91 break;
stefanrousseau 16:17c5916f2d12 92 }
rfinn 68:d38834307b17 93 case 'R': {
rfinn 68:d38834307b17 94 //Red
stefanrousseau 16:17c5916f2d12 95 SetLedColor(1);
stefanrousseau 16:17c5916f2d12 96 break;
stefanrousseau 16:17c5916f2d12 97 }
rfinn 68:d38834307b17 98 case 'G': {
rfinn 68:d38834307b17 99 //Green
stefanrousseau 16:17c5916f2d12 100 SetLedColor(2);
stefanrousseau 16:17c5916f2d12 101 break;
stefanrousseau 16:17c5916f2d12 102 }
rfinn 68:d38834307b17 103 case 'Y': {
rfinn 68:d38834307b17 104 //Yellow
stefanrousseau 16:17c5916f2d12 105 SetLedColor(3);
stefanrousseau 16:17c5916f2d12 106 break;
stefanrousseau 16:17c5916f2d12 107 }
rfinn 68:d38834307b17 108 case 'B': {
rfinn 68:d38834307b17 109 //Blue
stefanrousseau 16:17c5916f2d12 110 SetLedColor(4);
stefanrousseau 16:17c5916f2d12 111 break;
stefanrousseau 16:17c5916f2d12 112 }
rfinn 68:d38834307b17 113 case 'M': {
rfinn 68:d38834307b17 114 //Magenta
stefanrousseau 16:17c5916f2d12 115 SetLedColor(5);
stefanrousseau 16:17c5916f2d12 116 break;
stefanrousseau 16:17c5916f2d12 117 }
rfinn 68:d38834307b17 118 case 'T': {
rfinn 68:d38834307b17 119 //Turquoise
stefanrousseau 16:17c5916f2d12 120 SetLedColor(6);
stefanrousseau 16:17c5916f2d12 121 break;
stefanrousseau 16:17c5916f2d12 122 }
rfinn 68:d38834307b17 123 case 'W': {
rfinn 68:d38834307b17 124 //White
stefanrousseau 16:17c5916f2d12 125 SetLedColor(7);
stefanrousseau 16:17c5916f2d12 126 break;
stefanrousseau 16:17c5916f2d12 127 }
rfinn 68:d38834307b17 128 default: {
stefanrousseau 16:17c5916f2d12 129 break;
stefanrousseau 16:17c5916f2d12 130 }
stefanrousseau 16:17c5916f2d12 131 } //switch(cLedColor)
stefanrousseau 16:17c5916f2d12 132 return true;
rfinn 68:d38834307b17 133 } else {
stefanrousseau 16:17c5916f2d12 134 return false;
stefanrousseau 16:17c5916f2d12 135 }
stefanrousseau 16:17c5916f2d12 136 } //parse_JSON
stefanrousseau 16:17c5916f2d12 137
rfinn 68:d38834307b17 138 void send_button_data(char btn1, char btn2)
rfinn 68:d38834307b17 139 {
rfinn 68:d38834307b17 140 char modem_string[512];
rfinn 68:d38834307b17 141 GenerateModemString(&modem_string[0], btn1, btn2);
rfinn 68:d38834307b17 142 char myJsonResponse[512];
rfinn 68:d38834307b17 143 if (cell_modem_Sendreceive(&modem_string[0], &myJsonResponse[0])) {
rfinn 68:d38834307b17 144 if (true) {
rfinn 68:d38834307b17 145 //ledOnce = 1;
rfinn 68:d38834307b17 146 SetLedColor(0x2); //Green
rfinn 68:d38834307b17 147 }
rfinn 68:d38834307b17 148 parse_JSON(&myJsonResponse[0]);
rfinn 68:d38834307b17 149 }
rfinn 68:d38834307b17 150 }
rfinn 68:d38834307b17 151
rfinn 68:d38834307b17 152 int main()
rfinn 68:d38834307b17 153 {
rfinn 68:d38834307b17 154 //static unsigned ledOnce = 0;
fkellermavnet 20:27a4f27254d0 155
stefanrousseau 61:f6b93129f954 156 pc.baud(115200);
rfinn 68:d38834307b17 157 PRINTF(GRN "Hello World from the Cellular IoT Kit!\r\n");
rfinn 68:d38834307b17 158 PRINTF(GRN "Cellular IoT Buttons!\r\n\r\n");
JMF 0:9d5134074d84 159
rfinn 68:d38834307b17 160 // SW have a pull-up resistor, so the pin will be at 3.3 V by default
rfinn 68:d38834307b17 161 // and fall to 0 V when pressed. We therefore need to look for a falling edge
rfinn 68:d38834307b17 162 // on the pin to fire the interrupt
rfinn 68:d38834307b17 163 sw3.fall(&sw3_isr_down);
rfinn 68:d38834307b17 164 sw3.rise(&sw3_isr_up);
rfinn 68:d38834307b17 165 sw2.fall(&sw2_isr_down);
rfinn 68:d38834307b17 166 sw2.rise(&sw2_isr_up);
rfinn 68:d38834307b17 167 // since SW have an external pull-up, we should disable to internal pull-down
rfinn 68:d38834307b17 168 // resistor that is enabled by default using InterruptIn
rfinn 68:d38834307b17 169 sw3.mode(PullNone);
rfinn 68:d38834307b17 170 sw2.mode(PullNone);
stefanrousseau 11:e6602513730f 171
stefanrousseau 61:f6b93129f954 172 // Set LED to RED until init finishes
stefanrousseau 61:f6b93129f954 173 SetLedColor(0x1); //Red
JMF 0:9d5134074d84 174 // Initialize the modem
stefanrousseau 64:09004cd610df 175 PRINTF("\r\n");
stefanrousseau 61:f6b93129f954 176 cell_modem_init();
stefanrousseau 61:f6b93129f954 177 // Set LED BLUE for partial init
stefanrousseau 61:f6b93129f954 178 SetLedColor(0x4); //Blue
JMF 0:9d5134074d84 179
JMF 2:0e2ef866af95 180 // Send and receive data perpetually
JMF 2:0e2ef866af95 181 while(1) {
rfinn 68:d38834307b17 182 if (g_sw3_flag) {
rfinn 68:d38834307b17 183 printf("%s\n","SW3 Button");
rfinn 68:d38834307b17 184 led_green = 0;
rfinn 68:d38834307b17 185 send_button_data('0','1');
rfinn 68:d38834307b17 186 } else {
rfinn 68:d38834307b17 187 led_green = 1;
rfinn 68:d38834307b17 188 }
rfinn 68:d38834307b17 189
rfinn 68:d38834307b17 190 if (g_sw2_flag) {
rfinn 68:d38834307b17 191 printf("%s\n","SW2 Button");
rfinn 68:d38834307b17 192 led_blue = 0;
rfinn 68:d38834307b17 193 send_button_data('1','0');
rfinn 68:d38834307b17 194 } else {
rfinn 68:d38834307b17 195 led_blue = 1;
rfinn 68:d38834307b17 196 }
rfinn 68:d38834307b17 197
rfinn 68:d38834307b17 198 // put the MCU to sleep until an interrupt wakes it up
rfinn 68:d38834307b17 199 sleep();
stefanrousseau 3:26b3cc155f39 200 } //forever loop
JMF 0:9d5134074d84 201 }