luckfox-pico-sdk/sysdrv/source/mcu/rt-thread/examples/libc/rand.c
luckfox-eng29 8f34c2760d project:build.sh: Added fastboot support; custom modifications to U-Boot and kernel implemented using patches.
project:cfg:BoardConfig_IPC: Added fastboot BoardConfig file and firmware post-scripts, distinguishing between
the BoardConfigs for Luckfox Pico Pro and Luckfox Pico Max. project:app: Added fastboot_client and rk_smart_door
for quick boot applications; updated rkipc app to adapt to the latest media library. media:samples: Added more
usage examples. media:rockit: Fixed bugs; removed support for retrieving data frames from VPSS. media:isp:
Updated rkaiq library and related tools to support connection to RKISP_Tuner. sysdrv:Makefile: Added support for
compiling drv_ko on Luckfox Pico Ultra W using Ubuntu; added support for custom root filesystem.
sysdrv:tools:board: Updated Buildroot optional mirror sources, updated some software versions, and stored device
tree files and configuration files that undergo multiple modifications for U-Boot and kernel separately.
sysdrv:source:mcu: Used RISC-V MCU SDK with RT-Thread system, mainly for initializing camera AE during quick
boot. sysdrv:source:uboot: Added support for fastboot; added high baud rate DDR bin for serial firmware upgrades.
sysdrv:source:kernel: Upgraded to version 5.10.160; increased NPU frequency for RV1106G3; added support for
fastboot.

Signed-off-by: luckfox-eng29 <eng29@luckfox.com>
2024-10-14 09:47:04 +08:00

44 lines
782 B
C

/*
* rand.c
*
* Created on: 2010-11-17
* Author: bernard
*/
#include <stdio.h>
#include <stdlib.h>
#include <finsh.h>
int libc_rand(void)
{
int i1, i2;
int j1, j2;
/* The C standard says that "If rand is called before any calls to
srand have been made, the same sequence shall be generated as
when srand is first called with a seed value of 1." */
i1 = rand();
i2 = rand();
srand(1);
j1 = rand();
j2 = rand();
if (i1 < 0 || i2 < 0 || j1 < 0 || j2 < 0)
{
puts("Test FAILED!");
}
if (j1 == i1 && j2 == i2)
{
puts("Test succeeded.");
return 0;
}
else
{
if (j1 != i1)
printf("%d != %d\n", j1, i1);
if (j2 != i2)
printf("%d != %d\n", j2, i2);
puts("Test FAILED!");
return 1;
}
}
FINSH_FUNCTION_EXPORT(libc_rand, rand test for libc);