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card_emu: fix set_tpdu_state()

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* don't enter a state we are already in
* enable the UART receiver not only when waiting for CLA, but also
  generally when we're waiting for more data from the reader
This commit is contained in:
Harald Welte
2015-11-14 20:58:48 +01:00
parent 2935b3c479
commit 05b41c62f6
1 changed files with 6 additions and 0 deletions
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6
firmware/src_simtrace/card_emu.c
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@@ -385,9 +385,14 @@ static void add_tpdu_byte(struct card_handle *ch, uint8_t byte)
static void set_tpdu_state(struct card_handle *ch, enum tpdu_state new_ts)
{
if (ch->tpdu.state == new_ts)
return;
TRACE_DEBUG("7816 TPDU state %u -> %u\n", ch->tpdu.state, new_ts);
switch (new_ts) {
case TPDU_S_WAIT_CLA:
case TPDU_S_WAIT_RX:
card_emu_uart_enable(ch->uart_chan, ENABLE_RX);
break;
case TPDU_S_WAIT_PB:
@@ -397,6 +402,7 @@ static void set_tpdu_state(struct card_handle *ch, enum tpdu_state new_ts)
card_emu_uart_enable(ch->uart_chan, ENABLE_TX);
break;
}
ch->tpdu.state = new_ts;
}