errorcode = HAL_BUSY

Miller Gast 08.12.2016 23:24 #4821989

Lesenswert?

•

Ich generiere Code mit der CubeMX-Software für den STM32f030/STM32f103 
um einen WIFI-Chip(nRF24L01+) via SPI anzusprechen.

Dummerweise erhalte ich permanent den

 errorcode = HAL_BUSY;

beim Versuch das SPI zum Senden zu "überreden".

HAL_SPI_TransmitReceive_DMA(&hspi1,TxPointer,DummyDataPointer,1))

Wofür steht denn jetzt eigentlich dieses HAL_BUSY  und warum tritt es 
genau auf?

Antwort Zitieren Bearbeiten Thread verschieben Thread sperren Anmeldepflicht aktivieren Anpinnen Thread löschen Thread mit anderem zusammenführen Beitrag melden

Miller Gast 09.12.2016 00:55 #4822025

Lesenswert?

•

▲
▼

Vermutlich:

Busy flag (BSY)
The BSY flag is set and cleared by hardware (writing to
 this flag has no effect).When BSY is set, it indicates th
at a data transfer is in progress on the SPI (the SPI bus is
busy).The BSY flag can be used in certain modes to detect the end of a 
transfer so that the
software can disable the SPI or its peripheral
clock before entering a low-power mode which
does not provide a clock for the peripheral.
This avoids corrupting the last transfer.
The BSY flag is also useful for preventing
write collisions in a multimaster system. The BSY flag is cleared
 under any one of the following conditions:

-When the SPI is correctly disabled

-When a fault is detected in Master -mode (MODF bit set to 1)

-In Master mode, when it finishes a data transmission and no new data is 
ready to be sent

-In Slave mode, when the BSY flag is set to
 '0' for at least one SPI clock cycle between
  each data transfer.

Antwort Zitieren Bearbeiten Löschen Beitrag melden

errorcode = HAL_BUSY

Antwort schreiben