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* updated serial break implementation with configuring tx pin for gpio (break set) and reverting back for break clear.

pull/1243/head
akhilpanayam 2015-07-07 20:57:46 +05:30 committed by Karthik Purushothaman
parent 57dc24edf8
commit 58e94998b3
1 changed files with 24 additions and 8 deletions
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32
libraries/mbed/targets/hal/TARGET_Atmel/TARGET_SAM21/serial_api.c
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@ -498,18 +498,34 @@ void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, Pi
void serial_break_set(serial_t *obj) void serial_break_set(serial_t *obj)
{ {
disable_usart(obj); struct system_pinmux_config pin_conf;
_USART(obj).CTRLB.reg &= ~SERCOM_USART_CTRLB_TXEN; // to be checked pin_conf.direction = SYSTEM_PINMUX_PIN_DIR_OUTPUT;
usart_syncing(obj); pin_conf.input_pull = SYSTEM_PINMUX_PIN_PULL_NONE;
enable_usart(obj); pin_conf.mux_position = SYSTEM_PINMUX_GPIO;
pin_conf.powersave = false;
if (pSERIAL_S(obj)->pins[USART_TX_INDEX] != NC) {
if (NC != pin_conf.mux_position) {
system_pinmux_pin_set_config(pSERIAL_S(obj)->pins[USART_TX_INDEX], &pin_conf);
}
}
} }
void serial_break_clear(serial_t *obj) void serial_break_clear(serial_t *obj)
{ {
disable_usart(obj); uint32_t sercom_index = pinmap_merge_sercom(pSERIAL_S(obj)->pins[USART_TX_INDEX], pSERIAL_S(obj)->pins[USART_RX_INDEX]);
_USART(obj).CTRLB.reg |= SERCOM_USART_CTRLB_TXEN; // to be checked
usart_syncing(obj); struct system_pinmux_config pin_conf;
enable_usart(obj); pin_conf.direction = SYSTEM_PINMUX_PIN_DIR_INPUT;
pin_conf.input_pull = SYSTEM_PINMUX_PIN_PULL_NONE;
pin_conf.powersave = false;
if (pSERIAL_S(obj)->pins[USART_TX_INDEX] != NC) {
pin_conf.mux_position = pinmap_function_sercom(pSERIAL_S(obj)->pins[USART_TX_INDEX], sercom_index);
if (NC != pin_conf.mux_position) {
system_pinmux_pin_set_config(pSERIAL_S(obj)->pins[USART_TX_INDEX], &pin_conf);
}
}
} }
#endif //DEVICE_SERIAL_FC #endif //DEVICE_SERIAL_FC