TDD tests with RRU/R+S, adjustement of GPIO signals.

targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp

@@ -107,19 +107,15 @@ static int trx_usrp_start(openair0_device *device) {
     usrp_state_t *s = (usrp_state_t*)device->priv;
 
 
-  // setup GPIO for TDD, GPIO(0) = ATR_TX, GPIO(1) = ATR_RX
+  // setup GPIO for TDD, GPIO(4) = ATR_RX
   //set data direction register (DDR) to output
-    s->usrp->set_gpio_attr("FP0", "DDR", 0xf, 0xf);
+    s->usrp->set_gpio_attr("FP0", "DDR", 0x1f, 0x1f);
   
   //set control register to ATR
-    s->usrp->set_gpio_attr("FP0", "CTRL", 0x1, 0xf);
+    s->usrp->set_gpio_attr("FP0", "CTRL", 0x1f,0x1f);
   
   //set ATR register
-//  s->usrp->set_gpio_attr("FP0", "ATR_0X", 2, 0xf);
-    s->usrp->set_gpio_attr("FP0", "ATR_RX", 1<<7, 0xf);
-    s->usrp->set_gpio_attr("FP0", "ATR_TX", 1<<4, 0xf);
-//  s->usrp->set_gpio_attr("FP0", "ATR_XX", 8, 0xf);
-
+    s->usrp->set_gpio_attr("FP0", "ATR_RX", 1<<4, 0x1f);
 
     // init recv and send streaming
     uhd::stream_cmd_t cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);