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Diffstat (limited to 'fmc-test.c')
| -rw-r--r-- | fmc-test.c | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/fmc-test.c b/fmc-test.c new file mode 100644 index 0000000..0e8ff39 --- /dev/null +++ b/fmc-test.c @@ -0,0 +1,240 @@ +//------------------------------------------------------------------------------ +// main.c +//------------------------------------------------------------------------------ + + +//------------------------------------------------------------------------------ +// Headers +//------------------------------------------------------------------------------ +#include "stm32f4xx_hal.h" +#include "stm-init.h" +#include "stm-led.h" +#include "stm-fmc.h" +#include "stm-uart.h" + +//------------------------------------------------------------------------------ +// Defines +//------------------------------------------------------------------------------ + + +//------------------------------------------------------------------------------ +// Macros +//------------------------------------------------------------------------------ + + +//------------------------------------------------------------------------------ +// Variables +//------------------------------------------------------------------------------ +RNG_HandleTypeDef rng_inst; + +// FT: "I changed some interesting-to-look-at-in-the-debugger values to be +// volatile, so that my compiler wouldn't optimize/obscure them." + +volatile uint32_t data_diff = 0; +volatile uint32_t addr_diff = 0; + + +//------------------------------------------------------------------------------ +// Prototypes +//------------------------------------------------------------------------------ +/* XXX move this to stm-rng.[ch] */ +static void MX_RNG_Init(void); + +int test_fpga_data_bus(void); +int test_fpga_address_bus(void); + + +//------------------------------------------------------------------------------ +// Defines +//------------------------------------------------------------------------------ +#define TEST_NUM_ROUNDS 100000 + + +//------------------------------------------------------------------------------ +int main(void) +//------------------------------------------------------------------------------ +{ + int i; + + stm_init(); + + uart_send_string("Keep calm for Novena boot...\r\n"); + + // Blink blue LED for six seconds to not upset the Novena at boot. + led_on(LED_BLUE); + for (i = 0; i < 12; i++) { + HAL_Delay(500); + led_toggle(LED_BLUE); + } + + // initialize rng + MX_RNG_Init(); + + // prepare fmc interface + fmc_init(); + + // turn on green led, turn off other leds + led_on(LED_GREEN); + led_off(LED_YELLOW); + led_off(LED_RED); + led_off(LED_BLUE); + + // vars + volatile int data_test_ok = 0, addr_test_ok = 0, successful_runs = 0, failed_runs = 0, sleep = 0; + + // main loop (test, until an error is detected) + while (1) + { + // test data bus + data_test_ok = test_fpga_data_bus(); + // test address bus + addr_test_ok = test_fpga_address_bus(); + + uart_send_string("Data: "); + uart_send_integer(data_test_ok, 100000); + uart_send_string(", addr: "); + uart_send_integer(addr_test_ok, 100000); + uart_send_string("\r\n"); + + if (data_test_ok == TEST_NUM_ROUNDS && + addr_test_ok == TEST_NUM_ROUNDS) { + // toggle yellow led to indicate, that we are alive + led_toggle(LED_YELLOW); + + successful_runs++; + sleep = 100; + } else { + led_on(LED_RED); + failed_runs++; + sleep = 2000; + } + + uart_send_string("Success "); + uart_send_integer(successful_runs, 0); + uart_send_string(", fail "); + uart_send_integer(failed_runs, 0); + uart_send_string("\r\n\r\n"); + + HAL_Delay(sleep); + } + + // should never reach this line +} + + +//------------------------------------------------------------------------------ +int test_fpga_data_bus(void) +//------------------------------------------------------------------------------ +{ + int c, ok; + uint32_t rnd, buf; + HAL_StatusTypeDef hal_result; + + // run some rounds of data bus test + for (c=0; c<TEST_NUM_ROUNDS; c++) + { + data_diff = 0; + // try to generate "random" number + hal_result = HAL_RNG_GenerateRandomNumber(&rng_inst, &rnd); + if (hal_result != HAL_OK) break; + + // write value to fpga at address 0 + ok = fmc_write_32(0, &rnd); + if (ok != 0) break; + + // read value from fpga + ok = fmc_read_32(0, &buf); + if (ok != 0) break; + + // compare (abort testing in case of error) + if (buf != rnd) + { + data_diff = buf; + data_diff ^= rnd; + + uart_send_string("Data bus fail: expected "); + uart_send_binary(rnd, 32); + uart_send_string(", got "); + uart_send_binary(buf, 32); + uart_send_string(", diff "); + uart_send_binary(data_diff, 32); + uart_send_string("\r\n"); + + break; + } + } + + // return number of successful tests + return c; +} + + +//------------------------------------------------------------------------------ +int test_fpga_address_bus(void) +//------------------------------------------------------------------------------ +{ + int c, ok; + uint32_t rnd, buf; + HAL_StatusTypeDef hal_result; + + // run some rounds of address bus test + for (c=0; c<TEST_NUM_ROUNDS; c++) + { + addr_diff = 0; + // try to generate "random" number + hal_result = HAL_RNG_GenerateRandomNumber(&rng_inst, &rnd); + if (hal_result != HAL_OK) break; + + // we only have 2^22 32-bit words + //rnd &= 0x00FFFFFC; + rnd &= 0x0007FFFC; + + // don't test zero addresses (fpga will store data, not address) + if (rnd == 0) continue; + + // write dummy value to fpga at some non-zero address + ok = fmc_write_32(rnd, &buf); + if (ok != 0) break; + + // read value from fpga + ok = fmc_read_32(0, &buf); + if (ok != 0) break; + + // fpga receives address of 32-bit word, while we need + // byte address here to compare + buf <<= 2; + + // compare (abort testing in case of error) + if (buf != rnd) + { + addr_diff = buf; + addr_diff ^= rnd; + + uart_send_string("Addr bus fail: expected "); + uart_send_binary(rnd, 32); + uart_send_string(", got "); + uart_send_binary(buf, 32); + uart_send_string(", diff "); + uart_send_binary(addr_diff, 32); + uart_send_string("\r\n"); + + break; + } + } + + return c; +} + + +//------------------------------------------------------------------------------ +static void MX_RNG_Init(void) +//------------------------------------------------------------------------------ +{ + rng_inst.Instance = RNG; + HAL_RNG_Init(&rng_inst); +} + + +//------------------------------------------------------------------------------ +// EOF +//------------------------------------------------------------------------------ |