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stmhal: Add uart.sendbreak() method, to send a break condition.

This commit is contained in:
Damien George 2015-02-13 19:04:24 +00:00
parent 089c3f321e
commit baafb290ad
4 changed files with 19 additions and 0 deletions
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6
docs/library/pyb.UART.rst
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@ -134,3 +134,9 @@ Methods
Write a single character on the bus. ``char`` is an integer to write. Write a single character on the bus. ``char`` is an integer to write.
Return value: ``None``. Return value: ``None``.
.. method:: uart.sendbreak()
Send a break condition on the bus. This drives the bus low for a duration
of 13 bits.
Return value: ``None``.

1
stmhal/qstrdefsport.h
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@ -186,6 +186,7 @@ Q(any)
Q(writechar) Q(writechar)
Q(readchar) Q(readchar)
Q(readinto) Q(readinto)
Q(sendbreak)
Q(RTS) Q(RTS)
Q(CTS) Q(CTS)

9
stmhal/uart.c
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@ -614,6 +614,14 @@ STATIC mp_obj_t pyb_uart_readchar(mp_obj_t self_in) {
} }
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_uart_readchar_obj, pyb_uart_readchar); STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_uart_readchar_obj, pyb_uart_readchar);
// uart.sendbreak()
STATIC mp_obj_t pyb_uart_sendbreak(mp_obj_t self_in) {
pyb_uart_obj_t *self = self_in;
self->uart.Instance->CR1 |= USART_CR1_SBK;
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_uart_sendbreak_obj, pyb_uart_sendbreak);
STATIC const mp_map_elem_t pyb_uart_locals_dict_table[] = { STATIC const mp_map_elem_t pyb_uart_locals_dict_table[] = {
// instance methods // instance methods
@ -634,6 +642,7 @@ STATIC const mp_map_elem_t pyb_uart_locals_dict_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR_writechar), (mp_obj_t)&pyb_uart_writechar_obj }, { MP_OBJ_NEW_QSTR(MP_QSTR_writechar), (mp_obj_t)&pyb_uart_writechar_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_readchar), (mp_obj_t)&pyb_uart_readchar_obj }, { MP_OBJ_NEW_QSTR(MP_QSTR_readchar), (mp_obj_t)&pyb_uart_readchar_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_sendbreak), (mp_obj_t)&pyb_uart_sendbreak_obj },
// class constants // class constants
{ MP_OBJ_NEW_QSTR(MP_QSTR_RTS), MP_OBJ_NEW_SMALL_INT(UART_HWCONTROL_RTS) }, { MP_OBJ_NEW_QSTR(MP_QSTR_RTS), MP_OBJ_NEW_SMALL_INT(UART_HWCONTROL_RTS) },

3
tests/pyb/uart.py
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@ -12,3 +12,6 @@ print(uart.any())
print(uart.write('123')) print(uart.write('123'))
print(uart.write(b'abcd')) print(uart.write(b'abcd'))
print(uart.writechar(1)) print(uart.writechar(1))
# make sure this method exists
uart.sendbreak()