From 54e58dd0755b0fd7577e3f31df24401f96f33a9b Mon Sep 17 00:00:00 2001
From: Josh Blum <josh@joshknows.com>
Date: Tue, 28 Jun 2011 05:29:31 +0100
Subject: e100: added false alarm count + sleep for gpio irq (since its shared)
---
host/lib/usrp/e100/io_impl.cpp | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
(limited to 'host/lib')
diff --git a/host/lib/usrp/e100/io_impl.cpp b/host/lib/usrp/e100/io_impl.cpp
index 52da8b2cd..519d163a0 100644
--- a/host/lib/usrp/e100/io_impl.cpp
+++ b/host/lib/usrp/e100/io_impl.cpp
@@ -46,7 +46,7 @@ using namespace uhd::transport;
**********************************************************************/
struct e100_impl::io_impl{
io_impl(zero_copy_if::sptr data_transport, const size_t recv_width):
- data_transport(data_transport), async_msg_fifo(100/*messages deep*/)
+ data_transport(data_transport), async_msg_fifo(100/*messages deep*/), false_alarm(0)
{
for (size_t i = 0; i < recv_width; i++){
typedef bounded_buffer<managed_recv_buffer::sptr> buffs_queue_type;
@@ -65,6 +65,7 @@ struct e100_impl::io_impl{
double tick_rate; //set by update tick rate method
e100_ctrl::sptr iface; //so handle irq can peek and poke
void handle_irq(void);
+ size_t false_alarm;
std::vector<bounded_buffer<managed_recv_buffer::sptr> *> _buffs_queue;
@@ -132,7 +133,13 @@ struct e100_impl::io_impl{
void e100_impl::io_impl::handle_irq(void){
//check the status of the async msg buffer
const boost::uint32_t status = iface->peek32(E100_REG_RB_ERR_STATUS);
- if ((status & 0x3) == 0) return; //not done or error
+ if ((status & 0x3) == 0){ //not done or error
+ //This could be a false-alarm because spi readback is mixed in.
+ //So we just sleep for a bit rather than interrupt continuously.
+ if (false_alarm++ > 3) boost::this_thread::sleep(boost::posix_time::milliseconds(1));
+ return;
+ }
+ false_alarm = 0; //its a real message, reset the count...
//std::cout << boost::format("status: 0x%x") % status << std::endl;
//load the data struct and call the ioctl
--
cgit v1.2.3