the reset/ATR handling has been heavily updated/fixed.
instead of using the timer counter peripheral to handle
the waiting time and corresponding timeout, the USART peripheral
internal timeout mechanism is used.
this is particularly important for the SIMtrace board since the
clock signal is not connected to the timer counter.
thus this change adds card emulation support for SIMtrace boards.
Fi and Di have been properly rename to F and D since the "i"
stands only for an "indicated" value, not the actual value.
this does not change the USB protocol (the variable have just been
renamed).
additional variables store more information about the card
capabilities
NOTE: it has only be tested for the SIMtrace board
Change-Id: Ibcb2c8cace9137695adf5fb3de43566f7cfb93b5
since simtrace supports multiple application, but currently not
at the same time, the feature support is not app specific
Change-Id: I98ff92450cc2a247b294d2e15df171f3fe7c5156
monitoring the state changes of the VCC and nRST lines is required
to correctly detect warm and cold reset
Change-Id: I72099956332724f84226e1495fdc5a5b1a034695
UART baud rate is main clock (MCK) divided by CR*16.
The MCK values are chosen >= 48 MHz and <= 64 MHz to have a near
integer value CR for a baud rate of 921600 bps.
The end MCK frequency between simtrace and qmod differ slightly
but are close to 58 MHz.
Change-Id: Iaa4a97fc68494c93b9d128503515d88049de506c
USB reset can be signaled by pulling low USB D+ for at least 10 ms,
according to the USB specification. This force a re-enumeration.
This time is increased to 20 ms to work with more USB HUBs.
Some SAM3S based board have external D+ pull-up mechanism (such as
SIMtrace) which needs to be used to pull D+ low.
This is a legacy mechanism from SAM7S history.
This mechanism is not required anymore on the SAM3S, and the qmod
does not use it. When the USB HAL is suspended, the transceiver is
disabled, causing D+ and D- to be pulled low. Then the HAL is activated
again. This is particularly required when DFU is started (and
enumerated), and after flashing the SAM3S switched to the main
application (without reset), so it can properly re-enumerate.
This board difference is now defined on the board header.
Change-Id: I9b58d8101c2fcf5595026b675728826af26127a3
Use USART 0 connected to the SIM card side to sniff the communication.
The card side can also measure ETU times.
Do proper pin initialization.
This code can already capture the ATR communication between phone and card.
Change-Id: I0597ec723cb2225540c89c3821b91d8a45adfcd6
This way we can easily check with 'diff' for differences in our code and
Atmel softpack. Also, this layout is more suitable for building various
different firmware images (e.g. factory-test, dfu-loader, main
application) for a variety of different boards (simtrace, owhw, qmod).
