Question
STM32F722 Strange GPIO problem with Multiple CD4094(Serial to Parallel Converter)
STM32F722 Strange GPIO problem with Multiple CD4094(Serial to Parallel Converter)
Hi,
I am working with GPIO LED , LCD 4-bit Mode Working fine.
But 16 Multiple CD4094 have strange problem as below.
I am Just using D0, CLK , STB. and Not using any external pull up at STM32 Side.
The problem is:
When I am sending Alternate data It works fine on all CD4094 IC.
When I am sending Same data It does Not work properly on all CD4094 .
Is there any mistake in configuration of STM32 GPIO.
Please Help me to sort out issue . Please Check attachments of STM32 and Below Code.
--
Karan123
unsigned char BufferCD4094[20] ;
int i ;
for( i=0; i<=16; i++)
{
BufferCD4094[i] = 0xFF ;
}
WriteOnCD4094() ;
HAL_Delay(20);
#define CL_1 15 //Not working Fine
/* USER CODE END WHILE */
if((HAL_GPIO_ReadPin(GPIOE, SW4_Pin) == 0))
{
HAL_Delay(20);
if((HAL_GPIO_ReadPin(GPIOE, SW4_Pin) == 0))
{
LCDGotoxy(2,0) ;
LCDString("Scrolling - 16 Cards") ;
LCDGotoxy(3,0) ;
LCDString("LEDs 2 Seconds") ;
while (1)
{
for( i=0; i<=CL_1; i++)
{
BufferCD4094[i] = 0xFE ;
}
WriteOnCD4094() ;
HAL_Delay(2000);
for( i=0; i<=CL_1; i++)
{
BufferCD4094[i] = 0xFD ;
}
WriteOnCD4094() ;
HAL_Delay(2000);
for( i=0; i<=CL_1; i++)
{
BufferCD4094[i] = 0xFB ;
}
WriteOnCD4094() ;
HAL_Delay(2000);
for( i=0; i<=CL_1; i++)
{
BufferCD4094[i] = 0xF7 ;
}
WriteOnCD4094() ;
HAL_Delay(2000);
for( i=0; i<=CL_1; i++)
{
BufferCD4094[i] = 0xEF ;
}
WriteOnCD4094() ;
HAL_Delay(2000);
for( i=0; i<=CL_1; i++)
{
BufferCD4094[i] = 0xDF ;
}
WriteOnCD4094() ;
HAL_Delay(2000);
for( i=0; i<=CL_1; i++)
{
BufferCD4094[i] = 0xBF ;
}
WriteOnCD4094() ;
HAL_Delay(2000);
for( i=0; i<=CL_1; i++)
{
BufferCD4094[i] = 0x7F ;
}
WriteOnCD4094() ;
HAL_Delay(2000);
}
}
}
void WriteOnCD4094(void)
{
char mm,kk;
HAL_Delay(20);
HAL_GPIO_WritePin(GPIOB, CLK_Pin ,GPIO_PIN_SET);
HAL_Delay(2);
HAL_GPIO_WritePin(GPIOE, STB_Pin ,GPIO_PIN_SET);
HAL_Delay(2);
for(kk=0;kk <=15;kk++)
{
for(mm =0 ; mm < 8 ; mm++)
{
if(BufferCD4094[kk] & 0x80)
HAL_GPIO_WritePin(GPIOA, D0_Pin , GPIO_PIN_SET);
else
HAL_GPIO_WritePin(GPIOA, D0_Pin , GPIO_PIN_RESET);
if(BufferCD4094[kk] & 0x80)
HAL_GPIO_WritePin(GPIOA, D1_Pin , GPIO_PIN_SET);
else
HAL_GPIO_WritePin(GPIOA, D1_Pin , GPIO_PIN_RESET);
if(BufferCD4094[kk] & 0x80)
HAL_GPIO_WritePin(GPIOA, D2_Pin , GPIO_PIN_SET);
else
HAL_GPIO_WritePin(GPIOA, D2_Pin , GPIO_PIN_RESET);
if(BufferCD4094[kk] & 0x80)
HAL_GPIO_WritePin(GPIOA, D3_Pin , GPIO_PIN_SET);
else
HAL_GPIO_WritePin(GPIOA, D3_Pin , GPIO_PIN_RESET);
if(BufferCD4094[kk] & 0x80)
HAL_GPIO_WritePin(GPIOC, D4_Pin , GPIO_PIN_SET);
else
HAL_GPIO_WritePin(GPIOC, D4_Pin , GPIO_PIN_RESET);
if(BufferCD4094[kk] & 0x80)
HAL_GPIO_WritePin(GPIOC, D5_Pin , GPIO_PIN_SET);
else
HAL_GPIO_WritePin(GPIOC, D5_Pin , GPIO_PIN_RESET);
if(BufferCD4094[kk] & 0x80)
HAL_GPIO_WritePin(GPIOB, D6_Pin , GPIO_PIN_SET);
else
HAL_GPIO_WritePin(GPIOB, D6_Pin , GPIO_PIN_RESET);
HAL_GPIO_WritePin(GPIOB,CLK_Pin , GPIO_PIN_SET) ;
DelayCLCard(20) ;
BufferCD4094[kk] <<=1; // Shift 1 bit left
HAL_GPIO_WritePin(GPIOB,CLK_Pin , GPIO_PIN_RESET) ;
DelayCLCard(20) ;
}
}
HAL_Delay(2);
HAL_GPIO_WritePin(GPIOE,STB_Pin,GPIO_PIN_RESET) ;
HAL_Delay(2);
}
Below Code is working Fine. When sending alternating data on CD4094.
if((HAL_GPIO_ReadPin(GPIOE, SW2_Pin) == 0))
{
HAL_Delay(20);
if((HAL_GPIO_ReadPin(GPIOE, SW2_Pin) == 0))
{
LCDGotoxy(2,0) ;
LCDString("Diagonal 16-Cards") ;
LCDGotoxy(3,0) ;
LCDString("LEDs 2 Seconds") ;
while (1)
{
BufferCD4094[0] = 0xFE ;
BufferCD4094[1] = 0xFD ;
BufferCD4094[2] = 0xFB ;
BufferCD4094[3] = 0xF7 ;
BufferCD4094[4] = 0xEF ;
BufferCD4094[5] = 0xDF ;
BufferCD4094[6] = 0xBF ;
BufferCD4094[7] = 0x7F ;
BufferCD4094[8] = 0xFE ;
BufferCD4094[9] = 0xFD ;
BufferCD4094[10] = 0xFB ;
BufferCD4094[11] = 0xF7 ;
BufferCD4094[12] = 0xEF ;
BufferCD4094[13] = 0xDF ;
BufferCD4094[14] = 0xBF ;
BufferCD4094[15] = 0x7F ;
WriteOnCD4094() ;
HAL_Delay(4000);
BufferCD4094[0] = 0xFF ;
BufferCD4094[1] = 0xFF ;
BufferCD4094[2] = 0xFF ;
BufferCD4094[3] = 0xFF ;
BufferCD4094[4] = 0xFF ;
BufferCD4094[5] = 0xFF ;
BufferCD4094[6] = 0xFF ;
BufferCD4094[7] = 0xFF ;
BufferCD4094[8] = 0xFF ;
BufferCD4094[9] = 0xFF ;
BufferCD4094[10] = 0xFF ;
BufferCD4094[11] = 0xFF ;
BufferCD4094[12] = 0xFF ;
BufferCD4094[13] = 0xFF ;
BufferCD4094[14] = 0xFF ;
BufferCD4094[15] = 0xFF ;
WriteOnCD4094() ;
HAL_Delay(4000);
}
}
} 
