Posted on March 11, 2011 at 10:15hi,
i use a STM 32 discovery , and i would like to use the DAC without the library.
i make my driver , a pointer initialised on the address 0x4000 7400, and a function for write the value 0x0003 0003 in the control register.
But when i debug step by step my Control register keeps to 0, and when i write in the window control same problem my control register keeps to 0.
I link my program.
this is my main function:
#include ''DAC_struct_h.h''
#include ''CDSE_struct.h''
int main(void)
{
ptr_DAC_perso = (volatile struct DAC_perso *) 0x40007400;
CDSE_DAC_init();
unsigned int Dac_out_perso1_init,Dac_out_pe rso2_init,Dac_out_perso1,Dac_o ut_perso2,DAC_test_init;
DAC_test_init = ptr_DAC_perso -> CDSE_CTRL_REG.Global ;
Dac_out_perso1_init= ptr_DAC_perso -> CDSE_DAC_DOR1.Global ;
Dac_out_perso2_init= ptr_DAC_perso -> CDSE_DAC_DOR2.Global ;
while (1)
{
ptr_DAC_perso -> CDSE_DAC_DHR12R1.Global = 0xFFFFFFFF ;
ptr_DAC_perso -> CDSE_DAC_DHR12L1.Global = 0xFFFFFFFF ;
ptr_DAC_perso -> CDSE_DAC_DHR8R1.Global = 0xFFFFFFFF ;
ptr_DAC_perso -> CDSE_DAC_DHR12R2.Global = 0xFFFFFFFF ;
ptr_DAC_perso -> CDSE_DAC_DHR12L2.Global = 0xFFFFFFFF ;
ptr_DAC_perso -> CDSE_DAC_DHR8R2.Global = 0xFFFFFFFF ;
ptr_DAC_perso -> CDSE_DAC_DHR12RD.Global = 0xFFFFFFFF ;
ptr_DAC_perso -> CDSE_DAC_DHR12LD.Global = 0xFFFFFFFF ;
ptr_DAC_perso -> CDSE_DAC_DHR8RD.Global = 0xFFFFFFFF ;
Dac_out_perso1= ptr_DAC_perso -> CDSE_DAC_DOR1.Global ;
Dac_out_perso2= ptr_DAC_perso -> CDSE_DAC_DOR2.Global ;
}
}
this is my driver:
#ifndef DAC_struct_h_
#define DAC_struct_h_
struct CTRL_REG_bitfield_acces
{
unsigned int EN1 :1;
unsigned int BOFF1 :1;
unsigned int TEN1 :1;
unsigned int TSEL1 :3;
unsigned int WAVE1 :2;
unsigned int MAMP1 :4;
unsigned int DMA_EN1 :1;
unsigned int DMAU_DRIE1 :1;
unsigned int reserve1 :2;
unsigned int EN2 :1;
unsigned int BOFF2 :1;
unsigned int TEN2 :1;
unsigned int TSEL2 :3;
unsigned int WAVE2 :2;
unsigned int MAMP2 :4;
unsigned int DMA_EN2 :1;
unsigned int DMAU_DRIE2 :1;
unsigned int reserve2 :2;
};
union CTRL_REG_acces
{
struct CTRL_REG_bitfield_acces CTRL_REG_bitfield;
unsigned int Global;
};
.
.
.
.
struct DAC_perso
{
union CTRL_REG_acces CDSE_CTRL_REG;
union DAC_SWTRIGR_access CDSE_DAC_SWTRIGR;
union DAC_DHR12R1_access CDSE_DAC_DHR12R1;
union DAC_DHR12L1_access CDSE_DAC_DHR12L1;
union DAC_DHR8R1_access CDSE_DAC_DHR8R1;
union DAC_DHR12R1_access CDSE_DAC_DHR12R2;
union DAC_DHR12L1_access CDSE_DAC_DHR12L2;
union DAC_DHR8R1_access CDSE_DAC_DHR8R2;
union DAC_DHR12RD_access CDSE_DAC_DHR12RD;
union DAC_DHR12LD_access CDSE_DAC_DHR12LD;
union DAC_DHR8RD_access CDSE_DAC_DHR8RD;
union DAC_DOR1_access CDSE_DAC_DOR1;
union DAC_DOR2_access CDSE_DAC_DOR2;
union DAC_SR_access CDSE_DAC_SR;
};
volatile struct DAC_perso *ptr_DAC_perso;
#endif
and my function write :
#include ''CDSE_struct.h''
#include ''DAC_struct_h.h''
void CDSE_DAC_init(void)
{
ptr_DAC_perso -> CDSE_CTRL_REG.Global = 0x00030003 ;
}
if you have a solution for my problem , i would sincerely happy.
Thank a lot
