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https://github.com/gdsports/USBHost_t36
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Request string descriptors during enumeration
This commit is contained in:
PaulStoffregen
parent
6122604f55
commit
03fb64e1ab
27
host.h
27
host.h
@ -60,6 +60,12 @@ struct Device_struct {
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uint8_t hub_address;
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uint8_t hub_port;
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uint8_t enum_state;
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uint8_t bDeviceClass;
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uint8_t bDeviceSubClass;
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uint8_t bDeviceProtocol;
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uint16_t idVendor;
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uint16_t idProduct;
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uint16_t LanguageID;
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};
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struct Pipe_struct {
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@ -108,4 +114,25 @@ void free_Pipe(Pipe_t *q);
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Transfer_t * allocate_Transfer(void);
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void free_Transfer(Transfer_t *q);
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class USBHostDriver {
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public:
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virtual bool claim_device(Device_t *device) {
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return false;
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}
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virtual bool claim_interface(Device_t *device) {
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return false;
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}
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virtual void disconnect() {
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}
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};
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class USBHub : public USBHostDriver {
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};
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#endif
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168
k66_usbhost.ino
168
k66_usbhost.ino
@ -330,7 +330,7 @@ void mk_setup(setup_t &s, uint32_t bmRequestType, uint32_t bRequest,
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s.word2 = wIndex | (wLength << 16);
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}
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static uint8_t enumbuf[255];
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static uint8_t enumbuf[256] __attribute__ ((aligned(16)));
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void enumeration(const Transfer_t *transfer)
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{
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@ -341,55 +341,127 @@ void enumeration(const Transfer_t *transfer)
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//print(transfer);
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Device_t *dev = transfer->pipe->device;
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switch (dev->enum_state) {
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case 0: // read 8 bytes of device desc, set max packet, and send set address
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pipe_set_maxlen(dev->control_pipe, enumbuf[7]);
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mk_setup(dev->setup, 0, 5, assign_addr(), 0, 0); // 5=SET_ADDRESS
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new_Transfer(dev->control_pipe, NULL, 0);
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dev->enum_state = 1;
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break;
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case 1: // request all 18 bytes of device descriptor
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pipe_set_addr(dev->control_pipe, dev->setup.wValue);
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mk_setup(dev->setup, 0x80, 6, 0x0100, 0, 18); // 6=GET_DESCRIPTOR
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new_Transfer(dev->control_pipe, enumbuf, 18);
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dev->enum_state = 2;
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break;
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case 2: // read 18 device desc bytes, request first 9 bytes of config desc
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// TODO: actually do something with device descriptor?
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mk_setup(dev->setup, 0x80, 6, 0x0200, 0, 9); // 6=GET_DESCRIPTOR
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new_Transfer(dev->control_pipe, enumbuf, 9);
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dev->enum_state = 3;
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break;
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case 3: // read 9 bytes, request all of config desc
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len = enumbuf[2] | (enumbuf[3] << 8);
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Serial.print("Config data length = ");
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Serial.println(len);
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if (len > sizeof(enumbuf)) {
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// TODO: how to handle device with too much config data
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while (1) {
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// Within this large switch/case, "break" means we've done
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// some work, but more remains to be done in a different
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// state. Generally break is used after parsing received
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// data, but what happens next could be different states.
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// When completed, return is used. Generally, return happens
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// only after a new control transfer is queued, or when
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// enumeration is complete and no more communication is needed.
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switch (dev->enum_state) {
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case 0: // read 8 bytes of device desc, set max packet, and send set address
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pipe_set_maxlen(dev->control_pipe, enumbuf[7]);
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mk_setup(dev->setup, 0, 5, assign_addr(), 0, 0); // 5=SET_ADDRESS
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new_Transfer(dev->control_pipe, NULL, 0);
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dev->enum_state = 1;
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return;
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case 1: // request all 18 bytes of device descriptor
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pipe_set_addr(dev->control_pipe, dev->setup.wValue);
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mk_setup(dev->setup, 0x80, 6, 0x0100, 0, 18); // 6=GET_DESCRIPTOR
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new_Transfer(dev->control_pipe, enumbuf, 18);
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dev->enum_state = 2;
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return;
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case 2: // parse 18 device desc bytes
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dev->bDeviceClass = enumbuf[4];
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dev->bDeviceSubClass = enumbuf[5];
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dev->bDeviceProtocol = enumbuf[6];
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dev->idVendor = enumbuf[8] | (enumbuf[9] << 8);
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dev->idProduct = enumbuf[10] | (enumbuf[11] << 8);
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enumbuf[0] = enumbuf[14];
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enumbuf[1] = enumbuf[15];
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enumbuf[2] = enumbuf[16];
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if ((enumbuf[0] | enumbuf[1] | enumbuf[2]) > 0) {
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dev->enum_state = 3;
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} else {
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dev->enum_state = 11;
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}
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break;
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case 3: // request Language ID
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len = sizeof(enumbuf) - 4;
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mk_setup(dev->setup, 0x80, 6, 0x0300, 0, len); // 6=GET_DESCRIPTOR
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new_Transfer(dev->control_pipe, enumbuf + 4, len);
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dev->enum_state = 4;
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return;
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case 4: // parse Language ID
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if (enumbuf[4] < 4 || enumbuf[5] != 3) {
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dev->enum_state = 11;
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} else {
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dev->LanguageID = enumbuf[6] | (enumbuf[7] << 8);
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if (enumbuf[0]) dev->enum_state = 5;
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else if (enumbuf[1]) dev->enum_state = 7;
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else if (enumbuf[2]) dev->enum_state = 9;
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else dev->enum_state = 11;
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}
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break;
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case 5: // request Manufacturer string
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len = sizeof(enumbuf) - 4;
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mk_setup(dev->setup, 0x80, 6, 0x0300 | enumbuf[0], dev->LanguageID, len);
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new_Transfer(dev->control_pipe, enumbuf + 4, len);
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dev->enum_state = 6;
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return;
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case 6: // parse Manufacturer string
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// TODO: receive the string...
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if (enumbuf[1]) dev->enum_state = 7;
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else if (enumbuf[2]) dev->enum_state = 9;
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else dev->enum_state = 11;
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break;
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case 7: // request Product string
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len = sizeof(enumbuf) - 4;
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mk_setup(dev->setup, 0x80, 6, 0x0300 | enumbuf[1], dev->LanguageID, len);
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new_Transfer(dev->control_pipe, enumbuf + 4, len);
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dev->enum_state = 8;
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return;
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case 8: // parse Product string
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// TODO: receive the string...
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if (enumbuf[2]) dev->enum_state = 9;
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else dev->enum_state = 11;
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break;
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case 9: // request Serial Number string
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len = sizeof(enumbuf) - 4;
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mk_setup(dev->setup, 0x80, 6, 0x0300 | enumbuf[2], dev->LanguageID, len);
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new_Transfer(dev->control_pipe, enumbuf + 4, len);
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dev->enum_state = 10;
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return;
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case 10: // parse Serial Number string
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// TODO: receive the string...
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dev->enum_state = 11;
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break;
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case 11: // request first 9 bytes of config desc
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mk_setup(dev->setup, 0x80, 6, 0x0200, 0, 9); // 6=GET_DESCRIPTOR
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new_Transfer(dev->control_pipe, enumbuf, 9);
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dev->enum_state = 12;
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return;
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case 12: // read 9 bytes, request all of config desc
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len = enumbuf[2] | (enumbuf[3] << 8);
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Serial.print("Config data length = ");
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Serial.println(len);
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if (len > sizeof(enumbuf)) {
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// TODO: how to handle device with too much config data
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}
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mk_setup(dev->setup, 0x80, 6, 0x0200, 0, len); // 6=GET_DESCRIPTOR
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new_Transfer(dev->control_pipe, enumbuf, len);
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dev->enum_state = 13;
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return;
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case 13: // read all config desc, send set config
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Serial.print("bNumInterfaces = ");
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Serial.println(enumbuf[4]);
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Serial.print("bConfigurationValue = ");
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Serial.println(enumbuf[5]);
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// TODO: actually do something with interface descriptor?
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mk_setup(dev->setup, 0, 9, enumbuf[5], 0, 0); // 9=SET_CONFIGURATION
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new_Transfer(dev->control_pipe, NULL, 0);
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dev->enum_state = 14;
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return;
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case 14: // device is now configured
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// TODO: initialize drivers??
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dev->enum_state = 15;
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return;
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case 15: // control transfers for other stuff??
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default:
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return;
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}
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mk_setup(dev->setup, 0x80, 6, 0x0200, 0, len); // 6=GET_DESCRIPTOR
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new_Transfer(dev->control_pipe, enumbuf, len);
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dev->enum_state = 4;
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break;
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case 4: // read all config desc, send set config
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Serial.print("bNumInterfaces = ");
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Serial.println(enumbuf[4]);
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Serial.print("bConfigurationValue = ");
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Serial.println(enumbuf[5]);
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// TODO: actually do something with interface descriptor?
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mk_setup(dev->setup, 0, 9, enumbuf[5], 0, 0); // 9=SET_CONFIGURATION
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new_Transfer(dev->control_pipe, NULL, 0);
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dev->enum_state = 5;
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break;
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case 5: // device is now configured
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// TODO: initialize drivers??
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dev->enum_state = 6;
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break;
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case 6: // control transfers for other stuff??
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default:
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break;
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}
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}
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uint32_t assign_addr(void)
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