`HAL_SPI_Receive_IT` HAL function causes dummy reads in 3-wire mode,
that causes data corruption in RX FIFO/register. It isn't possible
to fix it without signification refactoring, but we may prevent data
corruption with the following fixes:
- RX buffer/register cleanup after asynchronous transfer in 3-wire mode
- Explicit RX buffer/register cleanup after SPI initialization
(for cases if we re-create SPI object).
All STM32 families except STM32H7 has the following 3-wire SPI peculiarity in master receive mode:
SPI continuously generates clock signal till it's disabled by a software. It causes that a software
must disable SPI in time. Otherwise, "dummy" reads will be generated.
Current STM32 synchronous SPI 3-wire implementation relies on HAL library functions HAL_SPI_Receive/HAL_SPI_Transmit.
It performs some SPI state checks to detect errors, but unfortunately it isn't fast enough to disable SPI in time.
Additionally, a multithreading environment or interrupt events may cause extra delays.
This commit contains the custom transmit/receive function for SPI 3-wire mode. It uses critical sections to
prevents accidental interrupt event delays, disables SPI after each frame receiving and disables SPI during
frame generation. It adds some delay between SPI frames (~700 ns), but gives reliable 3-wire SPI communications.
- move a code that waits readable SPI state from `spi_master_write`
function to inline functions `msp_writable` and `msp_wait_writable`
- move a code that waits writeable SPI state from `spi_master_write`
function to inline functions `msp_readable` and `msp_wait_readable`
- move a code that writes data to SPI from `spi_master_write`
function to inline function `msp_write_data`
- move a code that reads data from SPI from `spi_master_write`
function to inline function `msp_read_data`
This commit enables the Overriding of HAL callbacks and IRQHandler
in stm32xx_emac.cpp. Hence the user can have their own
implementations of callbacks and IRQHandler functions.
Signed-off-by: Kather Rafi Ibrahim <katherrafi.i@hcl.com>
As per STM32H7-series reference manuals:
"Up to 64 filter elements can be configured for 29-bit extended IDs."
This commit fixes a bug which prevented receiving CAN-messages
with extended IDs.
This commit adds internal pullup on DP line for usb enumeration
in nucleo_l152re platform. This platform as such does not have
usb connector (device).
This has been tested with example in https://github.com/ARMmbed/
mbed-os/blob/master/drivers/usb/include/usb/USBMouse.h#L58-L76
and mbed_app.json file
"target_overrides": {
"*": {
"platform.stdio-baud-rate": 115200,
"platform.all-stats-enabled": true,
"mbed-trace.enable": "0"
},
"NUCLEO_L152RE": {
"target.device_has_add": ["USBDEVICE"]
}
}
}
Signed-off-by: Krishna Mohan Dani <krishnamohan.d@hcl.com>
This commit modifies readme file. Descption for using
I2C timing algorithm and how to enable and disable
included.
Signed-off-by: Affrin Pinhero <affrin.pinhero@hcl.com>
Konstantin Kochin
Lukas Karel
Martin Kojtal
Kather Rafi Ibrahim
Leon
Jerome Coutant
Samu Ampio
Krishna Mohan Dani
Mohammed Mubeen
pennam
anish-k
byq77
Affrin Pinhero
Charles