COntrol FPGA component from Linux - COntrol FPGA component from Linux I am searching for a example that show me how to control fpga compionent from linux. I use cyclone 5 soc. is there any example available to show that? Replies: Re: COntrol FPGA component from Linux wow, thats beyond my expectations. thank you Fjumaah Replies: Re: COntrol FPGA component from Linux Hello, You can refer to this sample code to control LED on FPGA, #include <stdio.h> #include <unistd.h> #include <fcntl.h> #include <sys/mman.h> #include "hps.h" #include "stdint.h" #include <termios.h> /* The base address byte offset for the start of the ALT_LWFPGASLVS component. */ #define ALT_LWFPGASLVS_OFST 0xff200000 /* The base address byte offset for the start of the ALT_STM component. */ #define ALT_STM_OFST 0xfc000000 #define ALT_AXI_FPGASLVS_OFST (0xC0000000) // axi_master #define HW_REGS_BASE ( ALT_STM_OFST ) #define HW_REGS_SPAN ( 0x40000000 ) #define HW_REGS_MASK ( HW_REGS_SPAN - 1 ) #define LED_PIO_BASE 0x10040 int main() { void *virtual_base; int fd, i; int loop_count; int led_direction; int led_mask; void *h2p_lw_led_addr; int *ocram_src, *ocram_dest; int *dma_base; // map the address space for the LED registers into user space so we can interact with them. // we'll actually map in the entire CSR span of the HPS since we want to access various registers within that span if( ( fd = open( "/dev/mem", ( O_RDWR | O_SYNC ) ) ) == -1 ) { printf( "ERROR: could not open \"/dev/mem\"...\n" ); return( 1 ); } virtual_base = mmap( NULL, HW_REGS_SPAN, ( PROT_READ | PROT_WRITE ), MAP_SHARED, fd, ALT_AXI_FPGASLVS_OFST ); if( virtual_base == MAP_FAILED ) { printf( "ERROR: mmap() failed...\n" ); close( fd ); return( 1 ); } h2p_lw_led_addr=virtual_base + ( ( unsigned long )( ALT_LWFPGASLVS_OFST + LED_PIO_BASE ) & ( unsigned long)( HW_REGS_MASK ) ); // toggle the LEDs a bit loop_count = 0; led_mask = 0x01; led_direction = 0; // 0: left to right direction while( loop_count < 60 ) { // control led *(uint32_t *)h2p_lw_led_addr = ~led_mask; // wait 100ms usleep( 100*1000 ); // update led mask if (led_direction == 0){ led_mask <<= 1; if (led_mask == (0x01 << (LED_PIO_DATA_WIDTH-1))) led_direction = 1; }else{ led_mask >>= 1; if (led_mask == 0x01){ led_direction = 0; loop_count++; } } } // while // clean up our memory mapping and exit if( munmap( virtual_base, HW_REGS_SPAN ) != 0 ) { printf( "ERROR: munmap() failed...\n" ); close( fd ); return( 1 ); } close( fd ); return( 0 ); }