stm32 und HD4470 Problem

[Matthias (Gast)]

Guten Abend,

ich versuche jetzt seit geraumer Zeit ein Bathron-LDC mit dem STM32F103 
anzusteuern. Ich kriege aber nur die Obere der beiden Zeilen angezeigt 
und diese nur mit 5*3 Pixeln.

Ich vermute fast das ich was generelles falsch gemacht habe, finde es 
aber nicht. Die aus meiner Sicht relevanten Codeabschnitte:
main(void):

#include "stm32f10x_conf.h"
#include "Delay.h"
#include "DS18S20.h"
#include "HD4470.h"

void INIT_GPIO(void){
  GPIO_InitTypeDef GPIO_InitStructure;
  SystemInit();
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB,&GPIO_InitStructure);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOC,&GPIO_InitStructure);
}

int main(void)
{
  uint32_t zeit = 500;
  INIT_GPIO();
  GPIO_WriteBit(GPIOB,GPIO_Pin_12,ENABLE);  //enable power-supply for DS18S20

  DS18S20_init();
  HD4470_init();
  //HD4470_sprint("1234567890");
  Delay_Ms(zeit);

  while(1)
  {
    GPIO_WriteBit(GPIOC,GPIO_Pin_13, 1);
    Delay_Ms(zeit);
    GPIO_WriteBit(GPIOC,GPIO_Pin_13, 0);
    Delay_Ms(zeit);
  }
}

HD4470.c

#include "HD4470.h"
#include "stm32f10x_conf.h"
#include "Delay.h"
#include <string.h>

void HD4470_init(void);
void HD4470_clear(void);
void HD4470_command(int bits, int char_mode);
void HD4470_sprint(char text[]);

void HD4470_init(void){

  GPIO_InitTypeDef GPIO_InitStructure;
  //PORT A
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
      GPIO_InitStructure.GPIO_Pin = LCD_Command_RS | LCD_Command_RW | LCD_Command_E;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA,&GPIO_InitStructure);
  //PORT B
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
      GPIO_InitStructure.GPIO_Pin = LCD_DataBit_4 | LCD_DataBit_5 | LCD_DataBit_6 | LCD_DataBit_7;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB,&GPIO_InitStructure);

  HD4470_clear();
}

void HD4470_clear(void){
  HD4470_command(0x33,0);
  HD4470_command(0x32,0);
  HD4470_command(0x06,0);
  HD4470_command(0x0C,0);
  HD4470_command(0x28,0);
  HD4470_command(0x01,0);
}

void HD4470_command(int bits, int char_mode){
  if(char_mode!=1)char_mode=0;  //wenn charmode nicht explizit 1 ist, muss es 0 sein
  GPIO_WriteBit(LCD_Command_RS_PORT,LCD_Command_RS,DISABLE);
  GPIO_WriteBit(LCD_Command_RW_PORT,LCD_Command_RW,DISABLE);
  Delay_Ms(1);

  GPIO_WriteBit(LCD_DataBit_4_PORT,LCD_DataBit_4,DISABLE);
  GPIO_WriteBit(LCD_DataBit_5_PORT,LCD_DataBit_5,DISABLE);
  GPIO_WriteBit(LCD_DataBit_6_PORT,LCD_DataBit_6,DISABLE);
  GPIO_WriteBit(LCD_DataBit_7_PORT,LCD_DataBit_7,DISABLE);

  GPIO_WriteBit(LCD_DataBit_4_PORT,LCD_DataBit_4,(bits>>4)&0x01);
  GPIO_WriteBit(LCD_DataBit_5_PORT,LCD_DataBit_5,(bits>>5)&0x01);
  GPIO_WriteBit(LCD_DataBit_6_PORT,LCD_DataBit_6,(bits>>6)&0x01);
  GPIO_WriteBit(LCD_DataBit_7_PORT,LCD_DataBit_7,(bits>>7)&0x01);

  //    start transmission
  Delay_us(1);
  GPIO_WriteBit(LCD_Command_E_PORT,LCD_Command_E,ENABLE);
  Delay_us(1);
  GPIO_WriteBit(LCD_Command_E_PORT,LCD_Command_E,DISABLE);

  GPIO_WriteBit(LCD_DataBit_4_PORT,LCD_DataBit_4,(bits>>0)&0x01);
  GPIO_WriteBit(LCD_DataBit_5_PORT,LCD_DataBit_5,(bits>>1)&0x01);
  GPIO_WriteBit(LCD_DataBit_6_PORT,LCD_DataBit_6,(bits>>2)&0x01);
  GPIO_WriteBit(LCD_DataBit_7_PORT,LCD_DataBit_7,(bits>>3)&0x01);

  //    start transmission
  Delay_us(1);
  GPIO_WriteBit(LCD_Command_E_PORT,LCD_Command_E,ENABLE);
  Delay_us(1);
  GPIO_WriteBit(LCD_Command_E_PORT,LCD_Command_E,DISABLE);

}

void HD4470_sprint(char text[]){
  /*for(int i=0; i < strlen(text); ++i){
    cmd(text[i],1);
  }*/
  int i=0;
  while(i < strlen(text)){
    HD4470_command(text[i],1);
    ++i;
  }

}

"LCD_Command_E_PORT" und ähnliche wurden in den header-Dateien 
definiert.