upsilon/gateware/rtl/spi/spi_switch_sim.cpp

52 lines
1.2 KiB
C++

#include "../util.hpp"
#include "Vspi_switch.h"
Vspi_switch *tb;
static void set_and_check(unsigned int selected, unsigned int num, unsigned int expected) {
tb->miso = 1;
tb->mosi_ports = 1 << num;
tb->sck_ports = 1 << num;
tb->ss_L_ports = 1 << num;
tb->eval();
my_assert(tb->mosi == expected, "%u != %u", tb->mosi, expected);
my_assert(tb->sck == expected, "%u != %u", tb->sck, expected);
my_assert(tb->ss_L == expected, "%u != %u", tb->ss_L, expected);
my_assert(tb->miso_ports == 1 << selected, "%u != %u", tb->miso_ports, 1 << selected);
}
int main(int argc, char **argv) {
Verilated::commandArgs(argc, argv);
Verilated::traceEverOn(true);
tb = new Vspi_switch();
printf("Default behavior.\n");
tb->select = 0;
set_and_check(0, 0, 1);
set_and_check(0, 1, 0);
set_and_check(0, 2, 0);
printf("Selecting the first port.\n");
tb->select = 1;
set_and_check(0, 0, 1);
set_and_check(0, 1, 0);
set_and_check(0, 2, 0);
printf("Selecting the second port.\n");
tb->select = 1 << 1;
set_and_check(1, 0, 0);
set_and_check(1, 1, 1);
set_and_check(1, 2, 0);
printf("Selecting the third port.\n");
tb->select = 1 << 2;
set_and_check(2, 0, 0);
set_and_check(2, 1, 0);
set_and_check(2, 2, 1);
tb->final();
delete tb;
return 0;
}