Thread: how to calculate The next address of memory ?

I need write values to my SRAM memory, in fixed positions.

memmap.h

Code:

#define SRAM_ENDERECO_INICIAL	0xE0084000lu		// Endereço Inicial da SRAM

void SRAM_Init(void);

typedef struct stRede
{
	unsigned int iIP[4];
	unsigned int iMascara[4];
	unsigned int iGateway[4];
	unsigned int iDns[4];
	unsigned int iPorta;
} SYSCONFIG_REDE;

typedef struct stSerial
{
	unsigned int iIP[4];
	unsigned int iMascara[4];
	unsigned int iGateway[4];
	unsigned int iDns[4];
	unsigned int iPorta;
} SYSCONFIG_SERIAL;


SYSCONFIG_REDE *CONFIG_REDE;
SYSCONFIG_SERIAL *CONFIG_SERIAL;

memmap.c

Code:

#include "memmap.h"

void SRAM_Init(void)
{
	CONFIG_REDE = (SYSCONFIG_REDE *) SRAM_ENDERECO_INICIAL;
	//
	CONFIG_SERIAL = (SYSCONFIG_SERIAL *) (SRAM_ENDERECO_INICIAL + sizeof(CONFIG_REDE));
}

void SRAM_Save(void)
{
	*CONFIG_REDE->iIP[0] = 192;
	*CONFIG_REDE->iIP[1] = 168;
	*CONFIG_REDE->iIP[2] = 1;
	*CONFIG_REDE->iIP[3] = 222;

	*CONFIG_REDE->iPorta = 47000;

	*CONFIG_PESAGEM->lPesoCalibracao = 500000;
}

This line: *CONFIG_REDE->iIP[0] = 192;
Error.....: memmap.c:23: error: invalid type argument of ‘unary *’
//
// is This the correct way to write in next address ?
CONFIG_SERIAL = (SYSCONFIG_SERIAL *) (SRAM_ENDERECO_INICIAL + sizeof(CONFIG_REDE));

ok, perfect.