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-rw-r--r--self-test/fmc-perf.c110
1 files changed, 110 insertions, 0 deletions
diff --git a/self-test/fmc-perf.c b/self-test/fmc-perf.c
new file mode 100644
index 0000000..f0185a0
--- /dev/null
+++ b/self-test/fmc-perf.c
@@ -0,0 +1,110 @@
+/*
+ * Test read/write performance of the fmc bus
+ */
+#include "stm32f4xx_hal.h"
+#include "stm-init.h"
+#include "stm-fmc.h"
+#include "stm-uart.h"
+
+#define TEST_NUM_ROUNDS 2000000
+
+RNG_HandleTypeDef rng_inst;
+
+static void MX_RNG_Init(void)
+{
+ rng_inst.Instance = RNG;
+ HAL_RNG_Init(&rng_inst);
+}
+
+static uint32_t random(void)
+{
+ uint32_t rnd;
+ if (HAL_RNG_GenerateRandomNumber(&rng_inst, &rnd) != HAL_OK) {
+ uart_send_string("HAL_RNG_GenerateRandomNumber failed\r\n");
+ Error_Handler();
+ }
+ return rnd;
+}
+
+static void sanity(void)
+{
+ uint32_t rnd, data;
+
+ rnd = random();
+ if (fmc_write_32(0, &rnd) != 0) {
+ uart_send_string("fmc_write_32 failed\r\n");
+ Error_Handler();
+ }
+ if (fmc_read_32(0, &data) != 0) {
+ uart_send_string("fmc_read_32 failed\r\n");
+ Error_Handler();
+ }
+ if (data != rnd) {
+ uart_send_string("Data bus fail: expected ");
+ uart_send_hex(rnd, 8);
+ uart_send_string(", got ");
+ uart_send_hex(data, 8);
+ uart_send_string(", diff ");
+ uart_send_hex(data ^ rnd, 8);
+ uart_send_string("\r\n");
+ Error_Handler();
+ }
+}
+
+static void _time_check(char *label, const uint32_t t0)
+{
+ uint32_t t = HAL_GetTick() - t0;
+
+ uart_send_string(label);
+ uart_send_integer(t / 1000, 0);
+ uart_send_char('.');
+ uart_send_integer(t % 1000, 999);
+ uart_send_string(" seconds, ");
+ uart_send_integer((1000 * TEST_NUM_ROUNDS) / t, 0);
+ uart_send_string("/sec\r\n");
+}
+
+#define time_check(_label_, _expr_) \
+ do { \
+ uint32_t _t = HAL_GetTick(); \
+ (_expr_); \
+ _time_check(_label_, _t); \
+ } while (0)
+
+static void test_read(void)
+{
+ uint32_t i, data;
+
+ for (i = 0; i < TEST_NUM_ROUNDS; ++i) {
+ if (fmc_read_32(0, &data) != 0) {
+ uart_send_string("fmc_read_32 failed\r\n");
+ Error_Handler();
+ }
+ }
+}
+
+static void test_write(void)
+{
+ uint32_t i;
+
+ for (i = 0; i < TEST_NUM_ROUNDS; ++i) {
+ if (fmc_write_32(0, &i) != 0) {
+ uart_send_string("fmc_write_32 failed\r\n");
+ Error_Handler();
+ }
+ }
+}
+
+int main(void)
+{
+ stm_init();
+ MX_RNG_Init();
+ fmc_init();
+
+ sanity();
+
+ time_check("read ", test_read());
+ time_check("write ", test_write());
+
+ return 0;
+}