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Dependencies:   mbed mbed-rtos 4DGL-uLCD-SE RPCInterface

main.cpp@13:f1649dc31b04, 2019-11-12 (annotated)

Committer:
robo1340
Date:
Tue Nov 12 19:27:35 2019 +0000
Revision:
13:f1649dc31b04
Parent:
12:f1856a0b8ced
Child:
14:5b3f49d7bf19
added comments

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 1:491820ee784d 1 #include "mbed.h"
mbed_official 11:0309bef74ba8 2 #include "rtos.h"
robo1340 12:f1856a0b8ced 3
robo1340 12:f1856a0b8ced 4 #include "mbed_rpc.h"
robo1340 12:f1856a0b8ced 5 #include "uLCD_4DGL.h"
robo1340 12:f1856a0b8ced 6
robo1340 13:f1649dc31b04 7 /* Example RPC commands that have currently been implemented
robo1340 13:f1649dc31b04 8
robo1340 13:f1649dc31b04 9 /writeLCD/run Hello_world
robo1340 13:f1649dc31b04 10 /setTime/run 1256729737
robo1340 13:f1649dc31b04 11
robo1340 13:f1649dc31b04 12 */
robo1340 13:f1649dc31b04 13
robo1340 12:f1856a0b8ced 14 uLCD_4DGL uLCD(p9,p10,p11); // serial tx, serial rx, reset pin;
robo1340 12:f1856a0b8ced 15 Serial bluetooth(p13,p14);
robo1340 12:f1856a0b8ced 16 Serial pc(USBTX, USBRX);
robo1340 12:f1856a0b8ced 17
robo1340 13:f1649dc31b04 18 Mutex stdio_mutex; //mutex used when accessing stdio functions
robo1340 13:f1649dc31b04 19 Mutex lcd_mutex; //mutex used when accessing the bluetooth serial object
robo1340 12:f1856a0b8ced 20
robo1340 13:f1649dc31b04 21 Thread bluetooth_thread; //thread responsible for receiving rpc commands over bluetooth
robo1340 13:f1649dc31b04 22 Thread time_thread; //thread responsible for updating the lcd with the current time
robo1340 12:f1856a0b8ced 23
robo1340 13:f1649dc31b04 24 //rpc function prototypes
robo1340 12:f1856a0b8ced 25 void writeLCD(Arguments *in, Reply *out);
robo1340 12:f1856a0b8ced 26 void setTime (Arguments *in, Reply *out);
robo1340 12:f1856a0b8ced 27 RPCFunction rpcWriteLCD(&writeLCD, "writeLCD");
robo1340 12:f1856a0b8ced 28 RPCFunction rpcSetTime(&setTime, "setTime");
robo1340 12:f1856a0b8ced 29
robo1340 12:f1856a0b8ced 30
robo1340 12:f1856a0b8ced 31 void time_thread_func() {
emilmont 1:491820ee784d 32
robo1340 12:f1856a0b8ced 33 while (true) {
robo1340 12:f1856a0b8ced 34 time_t seconds = time(NULL);
robo1340 12:f1856a0b8ced 35
robo1340 12:f1856a0b8ced 36 stdio_mutex.lock();
robo1340 12:f1856a0b8ced 37 lcd_mutex.lock();
robo1340 12:f1856a0b8ced 38
robo1340 12:f1856a0b8ced 39 uLCD.locate(0,0);
robo1340 12:f1856a0b8ced 40 uLCD.printf("%s", ctime(&seconds)); //Time as a basic string
robo1340 12:f1856a0b8ced 41
robo1340 12:f1856a0b8ced 42 stdio_mutex.unlock();
robo1340 12:f1856a0b8ced 43 lcd_mutex.unlock();
robo1340 12:f1856a0b8ced 44
robo1340 12:f1856a0b8ced 45 //printf("Time as seconds since January 1, 1970 = %d\n", seconds);
emilmont 1:491820ee784d 46
robo1340 12:f1856a0b8ced 47 //char buffer[32];
robo1340 12:f1856a0b8ced 48 //strftime(buffer, 32, "%I:%M %p\n", localtime(&seconds));
robo1340 12:f1856a0b8ced 49 //printf("Time as a custom formatted string = %s", buffer);
robo1340 12:f1856a0b8ced 50
robo1340 12:f1856a0b8ced 51 Thread::wait(1000); //only update every second
robo1340 12:f1856a0b8ced 52 }
robo1340 12:f1856a0b8ced 53
robo1340 12:f1856a0b8ced 54 }
robo1340 12:f1856a0b8ced 55
robo1340 12:f1856a0b8ced 56
robo1340 12:f1856a0b8ced 57 void bluetooth_thread_func() {
robo1340 12:f1856a0b8ced 58
robo1340 12:f1856a0b8ced 59 //The mbed RPC classes are now wrapped to create an RPC enabled version - see RpcClasses.h so don't add to base class
robo1340 12:f1856a0b8ced 60 // receive commands, and send back the responses
robo1340 12:f1856a0b8ced 61 char buf[256], outbuf[256];
robo1340 12:f1856a0b8ced 62 uint16_t buf_pos = 0;
robo1340 12:f1856a0b8ced 63
robo1340 12:f1856a0b8ced 64 while(true) {
robo1340 12:f1856a0b8ced 65 //Thread::wait(20);
robo1340 12:f1856a0b8ced 66
robo1340 13:f1649dc31b04 67 if (pc.readable() == true) { //comment out when using bluetooth to receive rpc commands
robo1340 12:f1856a0b8ced 68 //if (bluetooth.readable() == true) {
robo1340 12:f1856a0b8ced 69
robo1340 12:f1856a0b8ced 70 stdio_mutex.lock();
robo1340 12:f1856a0b8ced 71
robo1340 13:f1649dc31b04 72 buf[buf_pos] = pc.getc(); //comment out when using bluetooth to receive rpc commands
robo1340 12:f1856a0b8ced 73 //buf[buf_pos] = bluetooth.getc();
robo1340 12:f1856a0b8ced 74
robo1340 12:f1856a0b8ced 75 stdio_mutex.unlock();
robo1340 12:f1856a0b8ced 76
robo1340 12:f1856a0b8ced 77 if (buf[buf_pos] == '\n') { //the end of the RPC command has been received
robo1340 12:f1856a0b8ced 78 buf[buf_pos] = '\0';
robo1340 12:f1856a0b8ced 79 buf_pos = 0;
robo1340 12:f1856a0b8ced 80 RPC::call(buf, outbuf); //make an RPC call
robo1340 12:f1856a0b8ced 81
robo1340 12:f1856a0b8ced 82 stdio_mutex.lock();
robo1340 12:f1856a0b8ced 83 pc.printf("%s\n", outbuf); //send the response
robo1340 12:f1856a0b8ced 84 stdio_mutex.unlock();
robo1340 12:f1856a0b8ced 85 }
robo1340 12:f1856a0b8ced 86 else {
robo1340 12:f1856a0b8ced 87 buf_pos++;
robo1340 12:f1856a0b8ced 88 }
robo1340 12:f1856a0b8ced 89
robo1340 12:f1856a0b8ced 90 } else {
robo1340 12:f1856a0b8ced 91 Thread::yield();
robo1340 12:f1856a0b8ced 92 }
robo1340 12:f1856a0b8ced 93
emilmont 1:491820ee784d 94 }
emilmont 1:491820ee784d 95 }
robo1340 12:f1856a0b8ced 96
emilmont 1:491820ee784d 97 int main() {
robo1340 12:f1856a0b8ced 98
robo1340 12:f1856a0b8ced 99 bluetooth_thread.start(bluetooth_thread_func);
robo1340 12:f1856a0b8ced 100 time_thread.start(time_thread_func);
robo1340 12:f1856a0b8ced 101
robo1340 12:f1856a0b8ced 102 }
robo1340 12:f1856a0b8ced 103
robo1340 12:f1856a0b8ced 104
robo1340 12:f1856a0b8ced 105 // Make sure the method takes in Arguments and Reply objects.
robo1340 12:f1856a0b8ced 106 void setTime (Arguments *in, Reply *out) {
robo1340 12:f1856a0b8ced 107 static const char * unix_time_str;
robo1340 12:f1856a0b8ced 108 uint32_t unix_time;
robo1340 12:f1856a0b8ced 109
robo1340 12:f1856a0b8ced 110 //set_time(1256729737); // Set RTC time to Wed, 28 Oct 2009 11:35:37
robo1340 12:f1856a0b8ced 111 unix_time_str = in->getArg<const char*>(); //get a pointer to the location where the argument string is stored
robo1340 12:f1856a0b8ced 112 unix_time = atoll(unix_time_str);
robo1340 12:f1856a0b8ced 113
robo1340 12:f1856a0b8ced 114 set_time(unix_time); // Set RTC time to Wed, 28 Oct 2009 11:35:37
emilmont 1:491820ee784d 115
emilmont 1:491820ee784d 116 }
robo1340 12:f1856a0b8ced 117
robo1340 12:f1856a0b8ced 118
robo1340 12:f1856a0b8ced 119 // Make sure the method takes in Arguments and Reply objects.
robo1340 12:f1856a0b8ced 120 void writeLCD (Arguments *in, Reply *out) {
robo1340 12:f1856a0b8ced 121 static const char * msg_str;
robo1340 12:f1856a0b8ced 122
robo1340 12:f1856a0b8ced 123 msg_str = in->getArg<const char*>(); //get a pointer to the location where the argument string is stored
robo1340 12:f1856a0b8ced 124
robo1340 12:f1856a0b8ced 125 stdio_mutex.lock();
robo1340 12:f1856a0b8ced 126 lcd_mutex.lock();
robo1340 12:f1856a0b8ced 127
robo1340 12:f1856a0b8ced 128 uLCD.locate(0,2);
robo1340 12:f1856a0b8ced 129 uLCD.printf("%s\r\n",msg_str);
robo1340 12:f1856a0b8ced 130
robo1340 12:f1856a0b8ced 131 stdio_mutex.unlock();
robo1340 12:f1856a0b8ced 132 lcd_mutex.unlock();
robo1340 12:f1856a0b8ced 133
robo1340 12:f1856a0b8ced 134 }