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card_emu: Ensure TX happens synchronously before state changes

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we cannot first chage the state and then transmit the byte
asynchronously later, this introduces race conditions.  Do it
in-line by explicit calls to the UART Tx function.
This commit is contained in:
Harald Welte
2016-02-24 21:00:46 +01:00
parent 849269f4cc
commit 855ba9e168
2 changed files with 67 additions and 42 deletions
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4
firmware/src_simtrace/card_emu.h
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@@ -15,8 +15,8 @@ struct card_handle *card_emu_init(uint8_t slot_num, uint8_t tc_chan, uint8_t uar
/* process a single byte received from the reader */
void card_emu_process_rx_byte(struct card_handle *ch, uint8_t byte);
/* return a single byte to be transmitted to the reader */
int card_emu_get_tx_byte(struct card_handle *ch, uint8_t *byte);
/* transmit a single byte to the reader */
int card_emu_tx_byte(struct card_handle *ch);
/* hardware driver informs us that a card I/O signal has changed */
void card_emu_io_statechg(struct card_handle *ch, enum card_io io, int active);