Diff: USBHostGPS/USBHostGPS.cpp

Revision:

1:2d8275968aaf

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/USBHostGPS/USBHostGPS.cpp	Wed Feb 05 13:40:35 2014 +0000
@@ -0,0 +1,98 @@
+#include "USBHostGPS.h"
+
+USBHostGPS::USBHostGPS(int baud_)
+{
+    host = USBHost::getHostInst();
+    init();
+    baud = baud_;
+}
+
+void USBHostGPS::init() {
+    dev = NULL;
+    bulk_in = NULL;
+    onUpdateRaw = NULL;
+    dev_connected = false;
+    gps_device_found = false;
+    gps_intf = -1;
+}
+
+bool USBHostGPS::connected() {
+    return dev_connected;
+}
+
+bool USBHostGPS::connect() {
+
+    if (dev_connected) {
+        return true;
+    }
+    
+    for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++) {
+        if ((dev = host->getDevice(i)) != NULL) {
+            if(host->enumerate(dev, this)) {
+                break;
+            }
+            if (gps_device_found) {
+                bulk_in = dev->getEndpoint(gps_intf, BULK_ENDPOINT, IN);
+                USB_TEST_ASSERT(bulk_in);
+                // stop bit = 1, parity = none, 8bit
+                uint8_t data[] = {baud&0xff, baud>>8, baud>>16, baud>>24, 0x00, 0x00, 0x08};
+                USB_TYPE rc = host->controlWrite(dev, 0x21, PL2303_SET_LINE_CODING, 0, 0, data, sizeof(data));
+                USB_TEST_ASSERT(rc == USB_TYPE_OK);
+                USB_INFO("New GPS device: VID:%04x PID:%04x [dev: %p - intf: %d]", dev->getVid(), dev->getPid(), dev, gps_intf);
+                bulk_in->attach(this, &USBHostGPS::rxHandler);
+                host->bulkRead(dev, bulk_in, bulk_buf, bulk_in->getSize(), false);
+                
+                dev_connected = true;
+                return true;
+            }
+        }
+    }
+    init();
+    return false;
+}
+
+void USBHostGPS::rxHandler() {
+    int len = bulk_in->getLengthTransferred();
+    if (onUpdateRaw) {
+        (*onUpdateRaw)((char*)bulk_buf, len);
+    }
+    nmea.inputNMEA((char*)bulk_buf, len);
+
+    if (dev) {
+        host->bulkRead(dev, bulk_in, bulk_buf, bulk_in->getSize(), false);
+    }
+}
+
+/*virtual*/ void USBHostGPS::setVidPid(uint16_t vid, uint16_t pid)
+{
+    USB_DBG("vid:%04x pid:%04x", vid, pid);
+    if (pid == 0x2303) {
+        gps_device_found = true;
+    }
+}
+
+/*virtual*/ bool USBHostGPS::parseInterface(uint8_t intf_nb, uint8_t intf_class, uint8_t intf_subclass, uint8_t intf_protocol) //Must return true if the interface should be parsed
+{
+    USB_DBG("intf: %d class: %02x %02x %02x", intf_nb, intf_class, intf_subclass, intf_protocol);
+    if (gps_device_found) {
+        if (gps_intf == -1) {
+            gps_intf = intf_nb;
+            return true;
+        }
+    }    
+    return false;
+}
+
+/*virtual*/ bool USBHostGPS::useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir) //Must return true if the endpoint will be used
+{
+    USB_DBG("intf_nb=%d type=%d dir=%d", intf_nb, type, dir);
+    if (gps_device_found) {
+        if (intf_nb == gps_intf) {
+            if (type == BULK_ENDPOINT && dir == IN) {
+                return true;
+            }
+        }
+    }
+    return false;
+}
+