Hi Alan,
On Thu, Feb 02, 2017 at 06:16:42PM +0000, Alan Graves wrote:
> Thanks for rechecking. I know I'm not setup with RTS/CTS handshaking on the
> custom board so that is probably going to be a problem. When I get a chance
> I'll repeat my tests with a complete serial signal set on the nRF52832 DK
> board.
>
> BTW Do you know if Linux assumes hardware flow control by default and if it
> is possible to override that configuration somewhere? I've been caught before
> with hardware flow defaults on PPP over serial on Linux...
Yes, the btattach program assumes flow control and baud rate of 1000000
(recent versions allow you specify baud on the command line).
Flow control can be disabled with a simple code change to
tools/btattach.c:
*** btattach.c 2017-02-02 12:15:05.030918824 -0800
--- /home/admin/tmp/btattach.c 2017-02-02 12:14:59.951029001 -0800
***************
*** 76,85 ****
--- 76,86 ----
cfmakeraw(&ti);
ti.c_cflag |= (speed | CLOCAL | CREAD);
/* Set flow control */
- ti.c_cflag |= CRTSCTS;
+ ti.c_cflag &= ~CRTSCTS;
if (tcsetattr(fd, TCSANOW, &ti) < 0) {
perror("Failed to set serial port settings");
close(fd);
Then run make from the bluez source directory. The new btattach binary
will be named tools/btattach.
You also need to disable flow control in your Mynewt target:
newt target set nina_hci
syscfg=BLE_HCI_UART_FLOW_CTRL=HAL_UART_FLOW_CTL_NONE
And rebuild / reload the firmware onto your board.
Chris
