Nios SPI and alt_u32 bit array

Nios® V/II Embedded Design Suite (EDS)

Support for Embedded Development Tools, Processors (SoCs and Nios® V/II processor), Embedded Development Suites (EDSs), Boot and Configuration, Operating Systems, C and C++

Nios SPI and alt_u32 bit array

1,143 Views

Hello guys. I have a little doubt.. Hope someone could help me..

I'm using the standard altera function to tx and rx on a SPI.

The proto is:


int alt_avalon_spi_command(alt_u32 base, alt_u32 slave, alt_u32 write_length, const alt_u8* wdata, alt_u32 read_length, alt_u8* read_data, alt_u32 flags)

So if i want to transmit the array:

uint32_t my_array[32]={.....};

I would call:

alt_avalon_spi_command(SPI_BASE, 0, 32, my_array, 0, NULL,0);

By the way, as you see, the function alt_avalon_spi_command wants a 8-bit unsigned pointer. So how can I figure out if I want to transmit a 32bit unsignet variable at a time ?

Intuitively I would do something like that:

alt_avalon_spi_command(SPI_BASE, 0, 32*4, (uint8_t*)my_array, 0, NULL,0);

What do you recommend ?

Link Copied

0 Replies

Community support is provided during standard business hours (Monday to Friday 7AM - 5PM PST). Other contact methods are available here.

Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

For more complete information about compiler optimizations, see our Optimization Notice.