Simon Ford
Twittering Billy Bass plays back samples and looks out for and reads twitters!
Dependencies: NetServices mbed
main.cpp@1:27b1efbf5a46, 2011-04-09 (annotated)
- Committer:
- simon
- Date:
- Sat Apr 09 08:35:20 2011 +0000
- Revision:
- 1:27b1efbf5a46
- Parent:
- 0:ad2574c88043
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| simon | 1:27b1efbf5a46 | 1 | // Twittering Billy Bass demo example |
| simon | 1:27b1efbf5a46 | 2 | // Hack billy to read out samples and fetch twitters |
| simon | 1:27b1efbf5a46 | 3 | // Based on Steve Ravet's original Billy Bass hack |
| simon | 1:27b1efbf5a46 | 4 | |
| simon | 0:ad2574c88043 | 5 | #include "mbed.h" |
| simon | 0:ad2574c88043 | 6 | |
| simon | 0:ad2574c88043 | 7 | #include "MSCFileSystem.h" |
| simon | 0:ad2574c88043 | 8 | #include "billy.h" |
| simon | 0:ad2574c88043 | 9 | #include "EthernetNetIf.h" |
| simon | 0:ad2574c88043 | 10 | #include "HTTPClient.h" |
| simon | 0:ad2574c88043 | 11 | |
| simon | 1:27b1efbf5a46 | 12 | // Network and USB filesystem |
| simon | 0:ad2574c88043 | 13 | EthernetNetIf eth; |
| simon | 0:ad2574c88043 | 14 | HTTPClient http; |
| simon | 0:ad2574c88043 | 15 | MSCFileSystem usb("usb"); |
| simon | 0:ad2574c88043 | 16 | |
| simon | 0:ad2574c88043 | 17 | DigitalOut setup_led(LED1); |
| simon | 0:ad2574c88043 | 18 | DigitalOut waiting_led(LED2); |
| simon | 0:ad2574c88043 | 19 | DigitalOut downloading_led(LED3); |
| simon | 0:ad2574c88043 | 20 | DigitalOut button_led(LED4); |
| simon | 0:ad2574c88043 | 21 | |
| simon | 1:27b1efbf5a46 | 22 | // Simple HTTP helper functions |
| simon | 0:ad2574c88043 | 23 | int get_file(char *url, char *file) { |
| simon | 0:ad2574c88043 | 24 | printf("Getting url to file [%s]...\n", url); |
| simon | 0:ad2574c88043 | 25 | HTTPFile f(file); |
| simon | 0:ad2574c88043 | 26 | HTTPResult r = http.get(url, &f); |
| simon | 0:ad2574c88043 | 27 | if (r != HTTP_OK) { |
| simon | 0:ad2574c88043 | 28 | printf("HTTPResult error %d\n", r); |
| simon | 0:ad2574c88043 | 29 | return 0; |
| simon | 0:ad2574c88043 | 30 | } |
| simon | 0:ad2574c88043 | 31 | return 1; |
| simon | 0:ad2574c88043 | 32 | } |
| simon | 0:ad2574c88043 | 33 | |
| simon | 0:ad2574c88043 | 34 | int get_string(char *url, char *str) { |
| simon | 0:ad2574c88043 | 35 | printf("Getting url [%s] to string...\n", url); |
| simon | 0:ad2574c88043 | 36 | HTTPText t; |
| simon | 1:27b1efbf5a46 | 37 | HTTPResult r = http.get(url, &t); |
| simon | 0:ad2574c88043 | 38 | if (r != HTTP_OK) { |
| simon | 0:ad2574c88043 | 39 | printf("HTTPResult error %d\n", r); |
| simon | 0:ad2574c88043 | 40 | str[0] = 0; |
| simon | 0:ad2574c88043 | 41 | return 0; |
| simon | 0:ad2574c88043 | 42 | } |
| simon | 0:ad2574c88043 | 43 | strcpy(str, t.gets()); |
| simon | 0:ad2574c88043 | 44 | return 1; |
| simon | 0:ad2574c88043 | 45 | } |
| simon | 0:ad2574c88043 | 46 | |
| simon | 1:27b1efbf5a46 | 47 | // a url to poll that returns the id of newest message |
| simon | 0:ad2574c88043 | 48 | int billy_get_id(char *id) { |
| simon | 1:27b1efbf5a46 | 49 | return get_string("http://example.com/billy/billy.py", id); |
| simon | 0:ad2574c88043 | 50 | } |
| simon | 0:ad2574c88043 | 51 | |
| simon | 1:27b1efbf5a46 | 52 | // downloads a wav file with specific id to the usb disk |
| simon | 0:ad2574c88043 | 53 | int billy_get_wav(char *id) { |
| simon | 0:ad2574c88043 | 54 | char url[128]; |
| simon | 1:27b1efbf5a46 | 55 | sprintf(url, "http://example.com/billydata/%s.wav", id); |
| simon | 0:ad2574c88043 | 56 | return get_file(url, "/usb/download.wav"); |
| simon | 0:ad2574c88043 | 57 | } |
| simon | 0:ad2574c88043 | 58 | |
| simon | 1:27b1efbf5a46 | 59 | // downloads a movement file with specific id to the usb disk |
| simon | 0:ad2574c88043 | 60 | int billy_get_mov(char *id) { |
| simon | 0:ad2574c88043 | 61 | char url[128]; |
| simon | 1:27b1efbf5a46 | 62 | sprintf(url, "http://example.com/billydata/%s.txt", id); |
| simon | 0:ad2574c88043 | 63 | return get_file(url, "/usb/download.txt"); |
| simon | 0:ad2574c88043 | 64 | } |
| simon | 0:ad2574c88043 | 65 | |
| simon | 1:27b1efbf5a46 | 66 | // see if there is a new message, and download it if so |
| simon | 0:ad2574c88043 | 67 | int billy_get_new_message() { |
| simon | 0:ad2574c88043 | 68 | static char last[64] = {0}; |
| simon | 0:ad2574c88043 | 69 | char id[64]; |
| simon | 0:ad2574c88043 | 70 | billy_get_id(id); |
| simon | 0:ad2574c88043 | 71 | if (strcmp(last, id) != 0) { // new message |
| simon | 0:ad2574c88043 | 72 | printf("New message found...\n"); |
| simon | 0:ad2574c88043 | 73 | downloading_led = 1; |
| simon | 0:ad2574c88043 | 74 | billy_get_wav(id); |
| simon | 0:ad2574c88043 | 75 | billy_get_mov(id); |
| simon | 0:ad2574c88043 | 76 | strcpy(last, id); |
| simon | 0:ad2574c88043 | 77 | downloading_led = 0; |
| simon | 0:ad2574c88043 | 78 | return 1; |
| simon | 0:ad2574c88043 | 79 | } |
| simon | 0:ad2574c88043 | 80 | return 0; |
| simon | 0:ad2574c88043 | 81 | } |
| simon | 0:ad2574c88043 | 82 | |
| simon | 1:27b1efbf5a46 | 83 | // pre-programmed songs on the USB disk |
| simon | 0:ad2574c88043 | 84 | const char *songs[] = {"baddonut", "belcher", "people", "clinton", "coconut", "bushfool", "ecky", "ni", "looney", "lumber"}; |
| simon | 0:ad2574c88043 | 85 | int nsongs = 10; |
| simon | 0:ad2574c88043 | 86 | |
| simon | 1:27b1efbf5a46 | 87 | // play the next pre-programmed song in the list |
| simon | 1:27b1efbf5a46 | 88 | void billy_play_next() { |
| simon | 0:ad2574c88043 | 89 | static int n = 0; |
| simon | 0:ad2574c88043 | 90 | char wavname[64]; |
| simon | 0:ad2574c88043 | 91 | char cmdname[64]; |
| simon | 0:ad2574c88043 | 92 | sprintf(wavname, "/usb/%s.wav", songs[n]); |
| simon | 0:ad2574c88043 | 93 | sprintf(cmdname, "/usb/%s.txt", songs[n]); |
| simon | 0:ad2574c88043 | 94 | n = (n + 1) % nsongs; |
| simon | 0:ad2574c88043 | 95 | billy_play(wavname, cmdname); |
| simon | 0:ad2574c88043 | 96 | } |
| simon | 0:ad2574c88043 | 97 | |
| simon | 1:27b1efbf5a46 | 98 | // capture button presses |
| simon | 0:ad2574c88043 | 99 | InterruptIn button(p24); |
| simon | 0:ad2574c88043 | 100 | void button_press() { |
| simon | 1:27b1efbf5a46 | 101 | if(button) { // minor debounce |
| simon | 0:ad2574c88043 | 102 | button_led = 1; |
| simon | 0:ad2574c88043 | 103 | } |
| simon | 0:ad2574c88043 | 104 | } |
| simon | 0:ad2574c88043 | 105 | |
| simon | 1:27b1efbf5a46 | 106 | // main billy loop, looking for tweets and button presses |
| simon | 0:ad2574c88043 | 107 | int main() { |
| simon | 0:ad2574c88043 | 108 | printf("Twittering billy...\n"); |
| simon | 0:ad2574c88043 | 109 | |
| simon | 0:ad2574c88043 | 110 | printf("Setup network...\n"); |
| simon | 0:ad2574c88043 | 111 | setup_led = 1; |
| simon | 0:ad2574c88043 | 112 | EthernetErr ethErr = eth.setup(); |
| simon | 1:27b1efbf5a46 | 113 | if(ethErr) { |
| simon | 1:27b1efbf5a46 | 114 | printf("Error %d in setup\n", ethErr); |
| simon | 1:27b1efbf5a46 | 115 | setup_led = 0; |
| simon | 1:27b1efbf5a46 | 116 | } |
| simon | 0:ad2574c88043 | 117 | |
| simon | 1:27b1efbf5a46 | 118 | button.rise(&button_press); // look out for button presses |
| simon | 0:ad2574c88043 | 119 | |
| simon | 0:ad2574c88043 | 120 | while (1) { |
| simon | 1:27b1efbf5a46 | 121 | waiting_led = !waiting_led; |
| simon | 1:27b1efbf5a46 | 122 | |
| simon | 1:27b1efbf5a46 | 123 | if(setup_led) { // if we have network |
| simon | 1:27b1efbf5a46 | 124 | if(billy_get_new_message()) { // see if there is a new message |
| simon | 1:27b1efbf5a46 | 125 | billy_play("/usb/download.wav", "/usb/download.txt"); // and play it if so |
| simon | 1:27b1efbf5a46 | 126 | } |
| simon | 0:ad2574c88043 | 127 | } |
| simon | 1:27b1efbf5a46 | 128 | |
| simon | 1:27b1efbf5a46 | 129 | if(button_led) { // if the button has been pressed |
| simon | 1:27b1efbf5a46 | 130 | billy_play_next(); // play the next song |
| simon | 0:ad2574c88043 | 131 | button_led = 0; |
| simon | 0:ad2574c88043 | 132 | } |
| simon | 0:ad2574c88043 | 133 | |
| simon | 0:ad2574c88043 | 134 | wait(1); |
| simon | 0:ad2574c88043 | 135 | } |
| simon | 0:ad2574c88043 | 136 | } |
| simon | 0:ad2574c88043 | 137 |