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Code Issues Releases Wiki Activity

Read device & config descriptors

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This commit is contained in:
PaulStoffregen 2017-02-08 08:49:52 -08:00
parent a649cbe12b
commit 91e1ceb0eb
1 changed files with 48 additions and 15 deletions
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63
k66_usbhost.ino
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@ -330,13 +330,10 @@ static uint8_t enumbuf[255];
void enumeration(const Transfer_t *transfer)
{
uint32_t len;
Serial.print(" CALLBACK: ");
uint8_t *p = (uint8_t *)transfer->buffer;
for (uint32_t i=0; i < transfer->length; i++) {
Serial.print(*p++, HEX);
Serial.print(' ');
}
Serial.println();
print_hexbytes(transfer->buffer, transfer->length);
//print(transfer);
Device_t *dev = transfer->pipe->device;
@ -347,23 +344,44 @@ void enumeration(const Transfer_t *transfer)
new_Transfer(dev->control_pipe, NULL, 0);
dev->enum_state = 1;
break;
case 1: // request all 18 bytes of device descriptor
Serial.println("TODO: request 18 byte device descriptor");
pipe_set_addr(dev->control_pipe, dev->setup.wValue);
mk_setup(dev->setup, 0x80, 6, 0x0100, 0, 18); // 6=GET_DESCRIPTOR
new_Transfer(dev->control_pipe, enumbuf, 18);
dev->enum_state = 2;
break;
case 2: // read 18 device desc bytes, request first 9 bytes of config desc
// TODO: actually do something with device descriptor?
mk_setup(dev->setup, 0x80, 6, 0x0200, 0, 9); // 6=GET_DESCRIPTOR
new_Transfer(dev->control_pipe, enumbuf, 9);
dev->enum_state = 3;
break;
case 3: // read 9 bytes, request all of config desc
len = enumbuf[2] | (enumbuf[3] << 8);
Serial.print("Config data length = ");
Serial.println(len);
if (len > sizeof(enumbuf)) {
// TODO: how to handle device with too much config data
}
mk_setup(dev->setup, 0x80, 6, 0x0200, 0, len); // 6=GET_DESCRIPTOR
new_Transfer(dev->control_pipe, enumbuf, len);
dev->enum_state = 4;
break;
case 4: // read all config desc, send set config
Serial.print("bNumInterfaces = ");
Serial.println(enumbuf[4]);
Serial.print("bConfigurationValue = ");
Serial.println(enumbuf[5]);
// TODO: actually do something with interface descriptor?
mk_setup(dev->setup, 0, 9, enumbuf[5], 0, 0); // 9=SET_CONFIGURATION
new_Transfer(dev->control_pipe, NULL, 0);
dev->enum_state = 5;
break;
case 5: // device is now configured
// TODO: initialize drivers??
dev->enum_state = 6;
break;
case 6: // control transfers for other stuff??
default:
break;
}
@ -389,6 +407,10 @@ void pipe_set_addr(Pipe_t *pipe, uint32_t addr)
pipe->qh.capabilities[0] = (pipe->qh.capabilities[0] & 0xFFFFFF80) | addr;
}
uint32_t pipe_get_addr(Pipe_t *pipe)
{
return pipe->qh.capabilities[0] & 0xFFFFFF80;
}
// Create a new device and begin the enumeration process
@ -811,6 +833,17 @@ void print(const Pipe_t *pipe)
}
void print_hexbytes(const void *ptr, uint32_t len)
{
if (ptr == NULL || len == 0) return;
const uint8_t *p = (const uint8_t *)ptr;
do {
if (*p < 16) Serial.print('0');
Serial.print(*p++, HEX);
Serial.print(' ');
} while (--len);
Serial.println();
}
void print(const char *s)
{