为什么出现这样的warn： type qualifier is meaningless on cast type

馒头仔

 #include "stm32f10x_gpio.h"
#include "stm32f10x_rcc.h"
#include "stm32f10x_fsmc.h"
#include "stm32f10x_flash.h"
#include "stm32f10x.h"

#define AXS_AX ((volatile unsigned int ) 0x90000000)
#define AXS_AY ((volatile unsigned int ) 0x90000008)
#define AXS_AZ ((volatile unsigned int ) 0x90000010)
#define AXS_AU ((volatile unsigned int ) 0x90000018)
#define  STAUD  0X0053/* */
#define  WPRMD  0X0087/* */
#define outpw( address,data) (*(unsigned short *)(address)=(data));

unsigned int inpw(unsigned int address)
{
   unsigned short data;
   data=*(unsigned short*)address;
   return data;
}

void p645_wreg(unsigned int base_addr,unsigned int rwcom,unsigned int data) 
{
union udata{
unsigned int ldata;
unsigned short idata[2];
}udt;
udt.ldata = data;
outpw(base_addr+4,udt.idata[0]);
outpw(base_addr+6, udt.idata[1]);
outpw(base_addr,rwcom);
}

int main(void)
 {
  RCC_Configuration();
  GPIO_Configuration();
  PCCARD_Init();
  p645_wreg(AXS_AZ, WPRMD, 0x00H);
}

为什么对于“  p645_wreg(AXS_AZ, WPRMD, 0x00H);”语句出现这样的warn： type qualifier is meaningless on cast type。

正点原子

说明你的参数传递有问题。

馒头仔

回复【2楼】正点原子:
---------------------------------
一般在什么情况下会出现这样的问题？什么叫参数传递有问题？？大哥，能否说得具体点吗

正点原子

回复【3楼】馒头仔:
---------------------------------
 p645_wreg(AXS_AZ, WPRMD, 0x00H);
改为：
 p645_wreg(0, 0,0);
你看还报错不。