diff options
author | Erik Gilling <konkers@android.com> | 2011-02-17 20:32:48 -0800 |
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committer | Erik Gilling <konkers@android.com> | 2011-02-18 15:22:17 -0800 |
commit | 9d4f4530cce6791ceb8c60601cc2a4e082aae8ab (patch) | |
tree | 1463e2fe0547160341fd7bb441248230d81013d9 | |
parent | f4e13b33980294035a83483eaa2bf80cb870b228 (diff) | |
download | demokit-9d4f4530cce6791ceb8c60601cc2a4e082aae8ab.tar.gz |
first pass at accessory chat
Change-Id: I73a79528a74ed4d889c388902fca8fceabb4ae49
-rw-r--r-- | accessorychat/accessorychat.pde | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/accessorychat/accessorychat.pde b/accessorychat/accessorychat.pde new file mode 100644 index 0000000..20a3dee --- /dev/null +++ b/accessorychat/accessorychat.pde @@ -0,0 +1,216 @@ +#include <Max3421e.h> +#include <usb.h> + +#define USB_ACCESSORY_VENDOR_ID 0x18D1 +#define USB_ACCESSORY_PRODUCT_ID 0x2D00 + +#define USB_ACCESSORY_ADB_PRODUCT_ID 0x2D01 +#define ACCESSORY_STRING_MANUFACTURER 0 +#define ACCESSORY_STRING_MODEL 1 +#define ACCESSORY_STRING_TYPE 2 +#define ACCESSORY_STRING_VERSION 3 + +#define ACCESSORY_SEND_STRING 52 +#define ACCESSORY_START 53 + +MAX3421E Max; +USB Usb; + +void setup(); +void loop(); + +uint8_t usbBuff[256]; + +void setup() +{ + Serial.begin( 115200 ); + Serial.print("\r\nStart"); + Max.powerOn(); + delay( 200 ); +} + +bool isAndroidVendor(USB_DEVICE_DESCRIPTOR *desc) +{ + return desc->idVendor == 0x18d1 || desc->idVendor == 0x22B8; +} + +bool isAccessoryDevice(USB_DEVICE_DESCRIPTOR *desc) +{ + return desc->idProduct == 0x2D00 || desc->idProduct == 0x2D01; +} + +void sendString(byte addr, int index, char *str) +{ + Usb.ctrlReq(addr, 0, USB_SETUP_HOST_TO_DEVICE | USB_SETUP_TYPE_VENDOR | USB_SETUP_RECIPIENT_DEVICE, + ACCESSORY_SEND_STRING, 0, 0, index, strlen(str) + 1, str); + +} + +void switchDevice(byte addr) +{ + sendString(addr, ACCESSORY_STRING_MANUFACTURER, "Google, Inc."); + sendString(addr, ACCESSORY_STRING_MODEL, "AccessoryChat"); + sendString(addr, ACCESSORY_STRING_TYPE, "Sample Program"); + sendString(addr, ACCESSORY_STRING_VERSION, "1.0"); + + Usb.ctrlReq(addr, 0, USB_SETUP_HOST_TO_DEVICE | USB_SETUP_TYPE_VENDOR | USB_SETUP_RECIPIENT_DEVICE, + ACCESSORY_START, 0, 0, 0, 0, NULL); +} + +bool findEndpoints(byte addr, EP_RECORD *inEp, EP_RECORD *outEp) +{ + int len; + byte err; + uint8_t *p; + + err = Usb.getConfDescr(addr, 0, 4, 0, (char *)usbBuff); + if (err) { + Serial.print("Can't get config descriptor length\n"); + return false; + } + + len = usbBuff[2] | ((int)usbBuff[3] << 8); + Serial.print("Config Desc Length: "); + Serial.println(len, DEC); + if (len > sizeof(usbBuff)) { + Serial.print("config descriptor too large\n"); + /* might want to truncate here */ + return false; + } + + err = Usb.getConfDescr(addr, 0, len, 0, (char *)usbBuff); + if (err) { + Serial.print("Can't get config descriptor\n"); + return false; + } + + p = usbBuff; + while (p < (usbBuff + len)){ + uint8_t descLen = p[0]; + uint8_t descType = p[1]; + USB_ENDPOINT_DESCRIPTOR *epDesc; + EP_RECORD *ep; + + switch (descType) { + case USB_DESCRIPTOR_CONFIGURATION: + Serial.print("config desc\n"); + break; + + case USB_DESCRIPTOR_INTERFACE: + Serial.print("interface desc\n"); + break; + + case USB_DESCRIPTOR_ENDPOINT: + epDesc = (USB_ENDPOINT_DESCRIPTOR *)p; + if (!inEp->epAddr && (epDesc->bEndpointAddress & 0x80)) + ep = inEp; + else if (!outEp->epAddr) + ep = outEp; + else + ep = NULL; + + if (ep) { + ep->epAddr = epDesc->bEndpointAddress; + ep->Attr = epDesc->bmAttributes; + ep->MaxPktSize = epDesc->wMaxPacketSize; + ep->sndToggle = bmSNDTOG0; + ep->rcvToggle = bmRCVTOG0; + } + break; + + default: + Serial.print("unkown desc type "); + Serial.println( descType, HEX); + break; + } + + p += descLen; + } + + return inEp->epAddr && outEp->epAddr; +} + +EP_RECORD ep_record[ 3 ]; //endpoint record structure for the mouse + + +void doAndroid(void) +{ + byte err; + byte idle; + + if (findEndpoints(1, &ep_record[1], &ep_record[2])) { + Serial.print("inEp: "); + Serial.println(ep_record[1].epAddr, HEX); + Serial.print("outEp: "); + Serial.println(ep_record[2].epAddr, HEX); + + ep_record[0] = *(Usb.getDevTableEntry(0,0)); + Usb.setDevTableEntry(1, ep_record); + + err = Usb.setConf( 1, 0, 1 ); + if (err) + Serial.print("Can't set config to 1\n"); + + Usb.setUsbTaskState( USB_STATE_RUNNING ); + + while(1) { + int len = Usb.newInTransfer(1, 1, sizeof(usbBuff), + (char *)usbBuff); + int i; + + if (len > 0) { + for (i = 0; i < len; i++) + Serial.print((char)usbBuff[i]); + Serial.print('\n'); + } + + Usb.outTransfer(1, 2, strlen("ping"), "ping"); + } + + } + +} + + +void loop() +{ + USB_DEVICE_DESCRIPTOR *devDesc = (USB_DEVICE_DESCRIPTOR *) usbBuff; + byte err; + + Max.Task(); + Usb.Task(); + if( Usb.getUsbTaskState() >= USB_STATE_CONFIGURING ) { + Serial.print("\nDevice addressed... "); + Serial.print("Requesting device descriptor."); + + err = Usb.getDevDescr(1, 0, 0x12, (char *) devDesc); + if (err) { + Serial.print("\nDevice descriptor cannot be retrieved. Program Halted\n"); + while(1); + } + + if (isAndroidVendor(devDesc)) { + Serial.print("found android device\n"); + + if (isAccessoryDevice(devDesc)) { + Serial.print("found android acessory device\n"); + doAndroid(); + } else { + Serial.print("found possible device. swithcing to serial mode\n"); + switchDevice(1); + } + } + + while (Usb.getUsbTaskState() != USB_DETACHED_SUBSTATE_WAIT_FOR_DEVICE) { + Max.Task(); + Usb.Task(); + + + } + + Serial.print("detached\n"); + + } + +} + |