TEAMUSB / Mbed 2 deprecated TEAMUSB_SLAVE

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependencies:   USBHost mbed

Fork of USBHostKeyboard_HelloWorld by TEAMUSB

main.cpp@14:c820ae094728, 2015-05-04 (annotated)

Committer:
armdran
Date:
Mon May 04 15:01:26 2015 +0000
Revision:
14:c820ae094728
Parent:
13:b05908f05e81 
- platform & pin switch; - queue size changed; - auto restart on spi failure implemented

Who changed what in which revision?

UserRevisionLine numberNew contents of line
samux 0:88d52e197201 1 #include "mbed.h"
samux 0:88d52e197201 2 #include "USBHostKeyboard.h"
armdran 14:c820ae094728 3 #include "time.h"
armdran 14:c820ae094728 4
armdran 14:c820ae094728 5 extern "C" void mbed_reset();
armdran 14:c820ae094728 6
armdran 14:c820ae094728 7 clock_t spi_begin = 0;
armdran 14:c820ae094728 8 clock_t spi_end = 0;
gabriel4211 12:d32975c44c98 9
gabriel4211 12:d32975c44c98 10 typedef struct {
gabriel4211 12:d32975c44c98 11 uint8_t key;
gabriel4211 12:d32975c44c98 12 uint8_t modifier;
gabriel4211 12:d32975c44c98 13 } keyPress_t;
gabriel4211 12:d32975c44c98 14
samux 0:88d52e197201 15 DigitalOut led(LED1);
armdran 14:c820ae094728 16 SPISlave device(p5, p6, p7, p8);
armdran 14:c820ae094728 17 DigitalOut ir(p21);
armdran 14:c820ae094728 18 Queue<keyPress_t, 1024> _keyQueue;
armdran 14:c820ae094728 19 MemoryPool<keyPress_t, 1024> mpool;
gabriel4211 13:b05908f05e81 20
armdran 11:e12aae7de530 21 uint8_t spi_reply_blocking(uint8_t reply = 0x00, bool sendIr = 0) {
armdran 11:e12aae7de530 22 device.reply(reply);
gabriel4211 12:d32975c44c98 23 if(sendIr == 1) {
gabriel4211 12:d32975c44c98 24 ir = 1; ir = 0;
gabriel4211 12:d32975c44c98 25 }
gabriel4211 13:b05908f05e81 26 while(!device.receive()) {
gabriel4211 13:b05908f05e81 27 // busy
gabriel4211 12:d32975c44c98 28 }
armdran 11:e12aae7de530 29 uint8_t instruction = device.read();
armdran 11:e12aae7de530 30 return instruction;
armdran 11:e12aae7de530 31 }
armdran 11:e12aae7de530 32
samux 0:88d52e197201 33
armdran 8:f8122ca2f58f 34 void onKeyMod(uint8_t key, uint8_t modifier) {
gabriel4211 12:d32975c44c98 35 keyPress_t *keypress = mpool.alloc();
gabriel4211 12:d32975c44c98 36 keypress->key = key;
armdran 14:c820ae094728 37 keypress->modifier = modifier;
gabriel4211 12:d32975c44c98 38 _keyQueue.put(keypress);
armdran 8:f8122ca2f58f 39 }
armdran 8:f8122ca2f58f 40
gabriel4211 12:d32975c44c98 41 void spi_task(void const *) {
armdran 14:c820ae094728 42
gabriel4211 12:d32975c44c98 43 while(1){
gabriel4211 12:d32975c44c98 44 osEvent evt = _keyQueue.get();
gabriel4211 12:d32975c44c98 45 if (evt.status == osEventMessage) {
armdran 14:c820ae094728 46
armdran 14:c820ae094728 47 spi_begin = clock();
armdran 14:c820ae094728 48
gabriel4211 12:d32975c44c98 49 keyPress_t *keypress = (keyPress_t*)evt.value.p;
gabriel4211 12:d32975c44c98 50 uint8_t key = keypress->key;
gabriel4211 12:d32975c44c98 51 uint8_t modifier = keypress->modifier;
gabriel4211 12:d32975c44c98 52
gabriel4211 13:b05908f05e81 53 printf(" sending key %x and modifier %x \r\n", key, modifier);
gabriel4211 12:d32975c44c98 54 uint8_t instruction = spi_reply_blocking(key, 1);
gabriel4211 12:d32975c44c98 55
gabriel4211 12:d32975c44c98 56 while(instruction != 0xFE) {
gabriel4211 12:d32975c44c98 57 printf(" out of sync.\r\n");
gabriel4211 12:d32975c44c98 58 instruction = spi_reply_blocking(key);
gabriel4211 12:d32975c44c98 59 }
gabriel4211 12:d32975c44c98 60
gabriel4211 12:d32975c44c98 61 uint8_t ack_key = spi_reply_blocking(modifier);
gabriel4211 12:d32975c44c98 62
gabriel4211 12:d32975c44c98 63 uint8_t ack_keychar = spi_reply_blocking();
gabriel4211 12:d32975c44c98 64
gabriel4211 12:d32975c44c98 65 if(ack_key != key)
gabriel4211 12:d32975c44c98 66 printf(" key ack failed (is %x, should be %x)!!!\r\n", ack_key, key);
gabriel4211 12:d32975c44c98 67 else
gabriel4211 12:d32975c44c98 68 printf(" key ack ok\r\n");
gabriel4211 13:b05908f05e81 69
gabriel4211 12:d32975c44c98 70 mpool.free(keypress);
armdran 14:c820ae094728 71
armdran 14:c820ae094728 72 spi_end = clock();
armdran 14:c820ae094728 73
gabriel4211 13:b05908f05e81 74 }
gabriel4211 12:d32975c44c98 75 }
gabriel4211 12:d32975c44c98 76 }
armdran 8:f8122ca2f58f 77
samux 0:88d52e197201 78 void keyboard_task(void const *) {
samux 0:88d52e197201 79
samux 0:88d52e197201 80 USBHostKeyboard keyboard;
samux 0:88d52e197201 81
samux 0:88d52e197201 82 while(1) {
armdran 8:f8122ca2f58f 83
armdran 8:f8122ca2f58f 84 printf("trying to connect\r\n");
armdran 8:f8122ca2f58f 85
samux 0:88d52e197201 86 // try to connect a USB keyboard
armdran 8:f8122ca2f58f 87 while(!keyboard.connect()) {
samux 0:88d52e197201 88 Thread::wait(500);
armdran 8:f8122ca2f58f 89 }
armdran 8:f8122ca2f58f 90 printf("connected\r\n");
samux 0:88d52e197201 91 // when connected, attach handler called on keyboard event
armdran 8:f8122ca2f58f 92 keyboard.attach(onKeyMod);
armdran 8:f8122ca2f58f 93 printf("eventhandler attached\r\n");
samux 0:88d52e197201 94 // wait until the keyboard is disconnected
armdran 8:f8122ca2f58f 95 while(keyboard.connected()) {
armdran 14:c820ae094728 96 //USBHost::poll();
armdran 14:c820ae094728 97 Thread::wait(500);
armdran 8:f8122ca2f58f 98 }
armdran 8:f8122ca2f58f 99 printf("disconnected\r\n");
samux 0:88d52e197201 100 }
samux 0:88d52e197201 101 }
samux 0:88d52e197201 102
armdran 14:c820ae094728 103 void alive_task(void const *) {
armdran 14:c820ae094728 104 while(1) {
armdran 14:c820ae094728 105 if(spi_begin > spi_end) {
armdran 14:c820ae094728 106 float diff = ((float)clock() - (float)spi_begin) / CLOCKS_PER_SEC;
armdran 14:c820ae094728 107 if(diff > .5) {
armdran 14:c820ae094728 108 mbed_reset();
armdran 14:c820ae094728 109 }
armdran 14:c820ae094728 110 }
armdran 14:c820ae094728 111 Thread::wait(2000);
armdran 14:c820ae094728 112 }
armdran 14:c820ae094728 113 }
armdran 14:c820ae094728 114
samux 0:88d52e197201 115 int main() {
gabriel4211 12:d32975c44c98 116 ir = 0;
samux 0:88d52e197201 117 Thread keyboardTask(keyboard_task, NULL, osPriorityNormal, 256 * 4);
gabriel4211 12:d32975c44c98 118 Thread spiTask(spi_task, NULL, osPriorityNormal, 256 * 4);
armdran 14:c820ae094728 119 Thread aliveTask(alive_task, NULL, osPriorityNormal, 256 * 4);
armdran 9:8bcd70b26084 120 device.frequency(1000000);
armdran 11:e12aae7de530 121 device.format(8, 1);
armdran 11:e12aae7de530 122 while(1) {}
armdran 9:8bcd70b26084 123
samux 0:88d52e197201 124 }