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5 Commits (85711eb09e1ad4f37a2ff659b7dc8bd9a83d01f8)

Author SHA1 Message Date
Laurent MEUNIER 85711eb09e STM32: Serial - do no clear RXNE flag 
The RXNE flag is getting cleared when reading Data Register so it should
not be cleared here. Especially in case of high data rate, another byte of
data could have received during irq_handler call and clearing the flag
would read and discard this data which would be lost for application.
 2017-07-17 08:46:00 +02:00
Laurent MEUNIER be8024de28 STM32: serial: use proper GET_IT macro 
Depending on families, different HAL macros are defined to check the
state of serial interrupts. In several cases, we can find only 1 macro:
__HAL_UART_GET_IT_SOURCE
Checks whether the specified UART interrupt has occurred or not

But in F0, F3, F7, L0, L4 there are 2 different macros
__HAL_UART_GET_IT
Checks whether the specified UART interrupt has occurred or not
__HAL_UART_GET_IT_SOURCE
Checks whether the specified UART interrupt source is enabled.

In the later case, __HAL_UART_GET_IT_SOURCE was being used so far,
but actually needs to be replaced by __HAL_UART_GET_IT. Using the right
macro, we also check the proper flags accordingly.
 2017-07-11 17:22:33 +02:00
Laurent MEUNIER f77ecf4e12 STM32: Put some serial code in common between families 2017-06-09 13:30:54 +02:00
Laurent MEUNIER c5c33f1d0f STM32: serial: clear Overrun flag if it is set when checking if readable 
Note that this could have side effects on the application as it would
not be aware that data has been missed. This may be later solved by
adding an error management parameter to the Serial API in mbed.

The advantage is that the serial link can work again.
 2017-06-08 17:01:30 +02:00
Francisco J. Manno 5e98da14d3 STM32s Serial does not properly handle parity bits 
Reworked the serial_format() function for STM32F0x
devices to take the format in the form:
data_bits - parity - stop_bits

E.g. 8 - N - 1

where data_bits exclude the parity bit.
Added a case for 7 bits data as at least the chips
STM32F0x1/STM32F0x2/STM32F0x8 support 7 bits data.

Consolidated serial_format() and uart_init()
functions into a general TARGET_STM serial_api.c
file since the functions are common to all STM targets.

Fixes #4189
 2017-05-30 17:17:20 +01:00