Functions | |
Private Functions | |
| static __always_inline int | usart_mode_is_multidrop (volatile avr32_usart_t *usart) |
| Checks if the USART is in multidrop mode. More... | |
| static int | usart_set_async_baudrate (volatile avr32_usart_t *usart, unsigned int baudrate, unsigned long pba_hz) |
| Calculates a clock divider (CD) and a fractional part (FP) for the USART asynchronous modes to generate a baud rate as close as possible to the baud rate set point. More... | |
| static int | usart_set_sync_master_baudrate (volatile avr32_usart_t *usart, unsigned int baudrate, unsigned long pba_hz) |
| Calculates a clock divider (CD) for the USART synchronous master modes to generate a baud rate as close as possible to the baud rate set point. More... | |
| static int | usart_set_sync_slave_baudrate (volatile avr32_usart_t *usart) |
| Selects the SCK pin as the source of baud rate for the USART synchronous slave modes. More... | |
| static int | usart_set_iso7816_clock (volatile avr32_usart_t *usart, unsigned int clock, unsigned long pba_hz) |
| Calculates a clock divider (CD) for the USART ISO7816 mode to generate an ISO7816 clock as close as possible to the clock set point. More... | |
Initialization Functions | |
| void | usart_reset (volatile avr32_usart_t *usart) |
| Resets the USART and disables TX and RX. More... | |
| int | usart_init_rs232 (volatile avr32_usart_t *usart, const usart_options_t *opt, long pba_hz) |
| Sets up the USART to use the standard RS232 protocol. More... | |
| int | usart_init_rs232_tx_only (volatile avr32_usart_t *usart, const usart_options_t *opt, long pba_hz) |
| Sets up the USART to use the standard RS232 protocol in TX-only mode. More... | |
| int | usart_init_hw_handshaking (volatile avr32_usart_t *usart, const usart_options_t *opt, long pba_hz) |
| Sets up the USART to use hardware handshaking. More... | |
| int | usart_init_modem (volatile avr32_usart_t *usart, const usart_options_t *opt, long pba_hz) |
| Sets up the USART to use the modem protocol, activating dedicated inputs/outputs. More... | |
| int | usart_init_sync_master (volatile avr32_usart_t *usart, const usart_options_t *opt, long pba_hz) |
| Sets up the USART to use a synchronous RS232-like protocol in master mode. More... | |
| int | usart_init_sync_slave (volatile avr32_usart_t *usart, const usart_options_t *opt, long pba_hz) |
| Sets up the USART to use a synchronous RS232-like protocol in slave mode. More... | |
| int | usart_init_rs485 (volatile avr32_usart_t *usart, const usart_options_t *opt, long pba_hz) |
| Sets up the USART to use the RS485 protocol. More... | |
| int | usart_init_IrDA (volatile avr32_usart_t *usart, const usart_options_t *opt, long pba_hz, unsigned char irda_filter) |
| Sets up the USART to use the IrDA protocol. More... | |
| int | usart_init_iso7816 (volatile avr32_usart_t *usart, const usart_iso7816_options_t *opt, int t, long pba_hz) |
| Sets up the USART to use the ISO7816 T=0 or T=1 smartcard protocols. More... | |
Transmit/Receive Functions | |
| int | usart_send_address (volatile avr32_usart_t *usart, int address) |
| Addresses a receiver. More... | |
| int | usart_write_char (volatile avr32_usart_t *usart, int c) |
| Writes the given character to the TX buffer if the transmitter is ready. More... | |
| int | usart_putchar (volatile avr32_usart_t *usart, int c) |
| Sends a character with the USART. More... | |
| int | usart_read_char (volatile avr32_usart_t *usart, int *c) |
| Checks the RX buffer for a received character, and stores it at the given memory location. More... | |
| int | usart_getchar (volatile avr32_usart_t *usart) |
| Waits until a character is received, and returns it. More... | |
| void | usart_write_line (volatile avr32_usart_t *usart, const char *string) |
| Writes one character string to the USART. More... | |
| int | usart_get_echo_line (volatile avr32_usart_t *usart) |
| Gets and echoes characters until end of line (detected by a CR character). More... | |
|
static |
Checks if the USART is in multidrop mode.
| usart | Base address of the USART instance. |
1 if the USART is in multidrop mode, otherwise 0. Referenced by usart_send_address().
|
static |
Calculates a clock divider (CD) and a fractional part (FP) for the USART asynchronous modes to generate a baud rate as close as possible to the baud rate set point.
Baud rate calculation: \( Baudrate = \frac{SelectedClock}{Over \times (CD + \frac{FP}{8})} \), Over being 16 or 8. The maximal oversampling is selected if it allows to generate a baud rate close to the set point.
| usart | Base address of the USART instance. |
| baudrate | Baud rate set point. |
| pba_hz | USART module input clock frequency (PBA clock, Hz). |
| USART_SUCCESS | Baud rate successfully initialized. |
| USART_INVALID_INPUT | Baud rate set point is out of range for the given input clock frequency. |
References USART_INVALID_INPUT, and USART_SUCCESS.
Referenced by usart_init_rs232().
|
static |
Calculates a clock divider (CD) for the USART ISO7816 mode to generate an ISO7816 clock as close as possible to the clock set point.
ISO7816 clock calculation: \( Clock = \frac{SelectedClock}{CD} \).
| usart | Base address of the USART instance. |
| clock | ISO7816 clock set point. |
| pba_hz | USART module input clock frequency (PBA clock, Hz). |
| USART_SUCCESS | ISO7816 clock successfully initialized. |
| USART_INVALID_INPUT | ISO7816 clock set point is out of range for the given input clock frequency. |
References USART_INVALID_INPUT, and USART_SUCCESS.
Referenced by usart_init_iso7816().
|
static |
Calculates a clock divider (CD) for the USART synchronous master modes to generate a baud rate as close as possible to the baud rate set point.
Baud rate calculation: \( Baudrate = \frac{SelectedClock}{CD} \).
| usart | Base address of the USART instance. |
| baudrate | Baud rate set point. |
| pba_hz | USART module input clock frequency (PBA clock, Hz). |
| USART_SUCCESS | Baud rate successfully initialized. |
| USART_INVALID_INPUT | Baud rate set point is out of range for the given input clock frequency. |
References USART_INVALID_INPUT, and USART_SUCCESS.
Referenced by usart_init_rs232_tx_only(), and usart_init_sync_master().
|
static |
Selects the SCK pin as the source of baud rate for the USART synchronous slave modes.
| usart | Base address of the USART instance. |
| USART_SUCCESS | Baud rate successfully initialized. |
References USART_SUCCESS.
Referenced by usart_init_sync_slave().
1.8.5