tests: adapted to HWRNG interface changes

tests/periph_hwrng/Makefile

@@ -1,7 +1,7 @@
-export APPLICATION = periph_random
+export APPLICATION = periph_hwrng
 include ../Makefile.tests_common
 
-FEATURES_REQUIRED = periph_random
+FEATURES_REQUIRED = periph_hwrng
 
 USEMODULE += xtimer
 

tests/periph_hwrng/README.md

@@ -0,0 +1,9 @@
+Expected result
+===============
+This test outputs a sequence of random bytes, starting with one, then two and so
+on, until 20 random bytes are printed. Then the application sleeps for a second
+and starts over.
+
+Background
+==========
+Test the functionality of a platforms HWRNG implementation.

tests/periph_hwrng/main.c

@@ -22,19 +22,20 @@
 #include <string.h>
 
 #include "xtimer.h"
-#include "periph/random.h"
+#include "periph/hwrng.h"
 
 #define LIMIT       (20U)
 
 int main(void)
 {
-    char buf[LIMIT];
+    uint8_t buf[LIMIT];
 
-    puts("\nRandom number generator low-level driver test\n");
-    printf("This test will print from 1 to %i random bytes about every second\n\n", LIMIT);
+    puts("\nHWRNG peripheral driver test\n");
+    printf("This test will print from 1 to %i random bytes about every"
+           "second\n\n", LIMIT);
 
-    puts("Initializing Random Number Generator driver.\n");
-    random_init();
+    puts("Initializing the HWRNG driver.\n");
+    hwrng_init();
 
     while (1) {
         /* zero out buffer */
@@ -43,12 +44,7 @@ int main(void)
         /* create random numbers */
         for (unsigned i = 1; i <= LIMIT; i++) {
             printf("generating %u random byte(s)\n", i);
-            unsigned count = random_read(buf, i);
-
-            if (count != i) {
-                printf("Error generating random bytes, got %u instead of %u", count, i);
-                return 0;
-            }
+            hwrng_read(buf, i);
 
             printf("Got:");
             for (unsigned j = 0; j < i; j++) {

tests/periph_random/README.md

@@ -1,7 +0,0 @@
-Expected result
-===============
-This test outputs a sequence of random bytes, starting with one, then two and so on, until 20 random bytes are printed. Then the application sleeps for a second and starts over.
-
-Background
-==========
-This test was introduced to test the implementation of the low-level random number generator driver. For most platforms the implementation is based on hardware CPU peripherals.

tests/pkg_micro-ecc/Makefile

@@ -1,7 +1,7 @@
 APPLICATION = micro-ecc
 include ../Makefile.tests_common
 
-FEATURES_REQUIRED = periph_random
+FEATURES_REQUIRED = periph_hwrng
 USEPKG += micro-ecc
 
 include $(RIOTBASE)/Makefile.include

tests/pkg_micro-ecc/main.c

@@ -37,7 +37,7 @@
 #include <stdio.h>
 #include <string.h>
 #include "uECC.h"
-#include "periph/random.h"
+#include "periph/hwrng.h"
 
 #define TESTROUNDS  16
 
@@ -61,9 +61,7 @@ int main(void)
     uint8_t l_sig[uECC_BYTES * 2];
 
     /* initialize hardware random number generator */
-    random_init();
-    /* power off RNG to save energy */
-    random_poweroff();
+    hwrng_init();
 
     printf("Testing %d random private key pairs and signature\n", TESTROUNDS);