Hi,
Do I need anything to init the HPS GPIO before I start using it from a bare metal application?
I start debugging from DS5 and it never gets past alt_setbits_word()
Does the FPGA have to be initialised before hand?? Or do the HPS GPIO work regardless of the FPGA programming status?
Doubt I'll get any answers/help ---- p***ing into the wind here...
#define GPIO_SPAN 0x1000 // 4 KB 4096DECIMAL
#define GPIO0_BASE_ADDRESS 0xFF208000
#define GPIO1_BASE_ADDRESS 0xFF209000
#define GPIO2_BASE_ADDRESS 0xFF20A000
#define gpio_swporta_dr 0x0 // 32 RW 0x0 Port A Data Register
#define gpio_swporta_ddr 0x4 // 32 RW 0x0 Port A Data Direction Register
int main(void) {
alt_setbits_word( GPIO1_BASE_ADDRESS + gpio_swporta_ddr, USER_IO_DIR );
alt_setbits_word( GPIO1_BASE_ADDRESS + gpio_swporta_dr, BIT_LED );
while(1)
{
puts("!!!Hello World!!!"); /* prints !!!Hello World!!! */
}
return EXIT_SUCCESS;
}
