SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
The QSPI generates one interrupt request which is connected to the IRQ_CROSSBAR module. This interrupt request, QSPI_IRQ, is connected to the IRQ_CROSSBAR_343 input. The QSPI_IRQ interrupt line can be activated by one of the interrupt events listed in Table 24-282.
Figure 24-107 shows a logical representation of the QSPI interrupt generation scheme.
QSPI_SPI_STATUS_REG[1] WC and QSPI_SPI_STATUS_REG[2] FC are status bits indicating whether word or frame transfer is complete. Setting the corresponding interrupt enable bit (WIRQ or FIRQ) in the QSPI_SPI_CMD_REG register allows these events (WC and FC) to generate an interrupt. The WC and FC bits are reset every time the user writes to the QSPI_SPI_CMD_REG register or reads the QSPI_SPI_STATUS_REG register. This is done to keep control parameters from changing the interface protocol signals while a transfer is in progress. Additionally, the QSPI_SPI_SWITCH_REG[1] MM_INT_EN bit is used to enable or disable the word complete interrupt during operations using the memory-mapped port.
When the QSPI_SPI_CMD_REG[14] WIRQ and QSPI_SPI_CMD_REG[15] FIRQ bits are set to 0x1 the following applies:
It must be considered that the previously described scenario applies if the QSPI_SPI_CMD_REG[14] WIRQ and QSPI_SPI_CMD_REG[15] FIRQ bits are set to 0x1.
The QSPI_IRQ interrupt line is activated only if at least one of the following conditions is met:
Table 24-282 lists the event flags and the corresponding mask bits of the sources which can cause interrupts.
Event Flag | Event Mask | Description |
---|---|---|
QSPI_INTR_STATUS_RAW_SET[1] WIRQ_RAW QSPI_INTR_STATUS_ENABLED_CLEAR[1] WIRQ_ENA QSPI_SPI_STATUS_REG[1] WC | QSPI_INTR_ENABLE_SET_REG[1] WIRQ_ENA_SET QSPI_INTR_ENABLE_CLEAR_REG[1] WIRQ_ENA_CLR QSPI_SPI_CMD_REG[14] WIRQ | Word complete interrupt event. Asserted each time after a word is transferred or received. |
QSPI_INTR_STATUS_RAW_SET[0] FIRQ_RAW QSPI_INTR_STATUS_ENABLED_CLEAR[0] FIRQ_ENA QSPI_SPI_STATUS_REG[2] FC | QSPI_INTR_ENABLE_SET_REG[0] FIRQ_ENA_SET QSPI_INTR_ENABLE_CLEAR_REG[0] FIRQ_ENA_CLR QSPI_SPI_CMD_REG[15] FIRQ | Frame complete interrupt event. Asserted each time after a frame is transferred or received. |