STM32 TFT LCD无法正常显示问题求助

janvon · 发表于 2016-12-13 10:30:40

开发板：红牛开发板REV 1.0
芯片：STM32F103ZET6
LCD屏：3.2寸

接口：FSMC数据口，RS接PF0（A0），CS接PG12（NE4）

/* 以下按照对原子教程举例A10  7FE A6  7E的理解，认为A0应该这么写0X00000000 */
typedef struct
{
  vu16 LCD_REG;
  vu16 LCD_RAM;
} LCD_TypeDef;

/* Note: LCD /RS is CE4 - Bank 4 of NOR/SRAM Bank 1~4 */
#define LCD_BASE       ((u32)(0x6C000000 | 0x00000000))
#define LCD          ((LCD_TypeDef *) LCD_BASE)

CTRL LINE方面配置，是照附送例程抄过来的，其中PE6多出来，不明白其用途，以及BACKLIGHT(PA1)未配置

void LCD_CtrlLinesConfig(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  /* Enable FSMC, GPIOD, GPIOE, GPIOF, GPIOG and AFIO clocks */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, ENABLE);

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE |
                     RCC_APB2Periph_GPIOF | RCC_APB2Periph_GPIOG |
                     RCC_APB2Periph_AFIO, ENABLE);

  /* Set PD.00(D2), PD.01(D3), PD.04(NOE), PD.05(NWE), PD.08(D13), PD.09(D14),
   PD.10(D15), PD.14(D0), PD.15(D1) as alternate
   function push pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_4 | GPIO_Pin_5 |
                              GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_14 |
                              GPIO_Pin_15;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOD, &GPIO_InitStructure);

  /* Set PE.07(D4), PE.08(D5), PE.09(D6), PE.10(D7), PE.11(D8), PE.12(D9), PE.13(D10),
   PE.14(D11), PE.15(D12) as alternate function push pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 |
                              GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 |
                              GPIO_Pin_15;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOE, &GPIO_InitStructure);

  GPIO_WriteBit(GPIOE, GPIO_Pin_6, Bit_SET);

  /* Set PF.00(A0 (RS)) as alternate function push pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOF, &GPIO_InitStructure);

  /* Set PG.12(NE4 (LCD/CS)) as alternate function push pull - CE3(LCD /CS) */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOG, &GPIO_InitStructure);
}

int main(void)
{
SystemInit();
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOF | RCC_APB2Periph_GPIOA, ENABLE);
GPIO_Configuration();
SysTick_Config(72000);
STM3210E_LCD_Init(); //内含附送的LCD初始化，但未标明型号

// while(1)
// {
// GPIO_SetBits(GPIOA , GPIO_Pin_1);
// LCD_Clear(Blue);                         //CLEAR失败
// Delay(1000);
// LCD_Clear(Magenta);                      //CLEAR失败
// Delay(1000);
// LCD_Clear(Red);                            //CLEAR失败
// Delay(1000);
// }

GPIO_SetBits(GPIOF , GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8);

LCD_WriteReg(0x0000, 0x0001);

Delay(100);

DeviceCode = LCD_ReadReg(0x0000);       //读取ID失败

USART_SendData(USART1, DeviceCode);
Delay(1000);
// }
}

实在没办法，把附送的例程原封不动下进去，结果还是不行
其中LCD的地址设置有所差异
typedef struct
{
  vu16 LCD_REG;
  vu16 LCD_RAM;
} LCD_TypeDef;

/* LCD is connected to the FSMC_Bank1_NOR/SRAM4 and NE4 is used as ship select signal */
#define LCD_BASE ((u32)(0x60000000 | 0x0C000000))
#define LCD       ((LCD_TypeDef *) LCD_BASE)

STLINK调试，LCD不亮

下好程序接电源，仅亮背光

目前不知道是否屏子坏了或是程序的问题（板上没有亮度对比度的可调电阻，软件控制BACKLIGHT正常）