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authorPaul Selkirk <paul@psgd.org>2015-10-26 15:18:58 -0400
committerPaul Selkirk <paul@psgd.org>2015-10-26 15:18:58 -0400
commit26f12903dab2fafeaaefb02349763618ce96d070 (patch)
treeb37cceea7014770ea2ae039928e57b6f02c0aaa2 /fmc-test.c
Based on user/ft/stm32-dev-bridge, without the project-specific build
directories (and duplicated code).
Diffstat (limited to 'fmc-test.c')
-rw-r--r--fmc-test.c240
1 files changed, 240 insertions, 0 deletions
diff --git a/fmc-test.c b/fmc-test.c
new file mode 100644
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+++ 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
+//------------------------------------------------------------------------------