i9341 TFT 读取ID

发布于 2019-04-26 13:41:49 浏览：2106 订阅该版

这个 研究了三天  代码这块对比的407 开发版例程  但是一直不能读取ID

```c
void HAL_SRAM_MspInit(SRAM_HandleTypeDef *hsram)
{
        GPIO_InitTypeDef GPIO_Initure;

__HAL_RCC_FSMC_CLK_ENABLE();
        __HAL_RCC_GPIOD_CLK_ENABLE();
        __HAL_RCC_GPIOE_CLK_ENABLE();
         __HAL_RCC_GPIOF_CLK_ENABLE();
        __HAL_RCC_GPIOG_CLK_ENABLE();
        //init PD0,1,4,5,7,8,9,10,13,14,15
        GPIO_Initure.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_Initure.Mode = GPIO_MODE_AF_PP;
        GPIO_Initure.Pull = GPIO_PULLUP;
        GPIO_Initure.Speed = GPIO_SPEED_HIGH;
        GPIO_Initure.Alternate = GPIO_AF12_FSMC;
        HAL_GPIO_Init(GPIOD, &GPIO_Initure);

GPIO_Initure.Pin = GPIO_PIN_12;
        GPIO_Initure.Mode = GPIO_MODE_AF_PP;
        GPIO_Initure.Pull = GPIO_PULLUP;
        GPIO_Initure.Speed = GPIO_SPEED_HIGH;
        GPIO_Initure.Alternate = GPIO_AF12_FSMC;
        HAL_GPIO_Init(GPIOF, &GPIO_Initure);

GPIO_Initure.Pin = GPIO_PIN_12;
        GPIO_Initure.Mode = GPIO_MODE_AF_PP;
        GPIO_Initure.Pull = GPIO_PULLUP;
        GPIO_Initure.Speed = GPIO_SPEED_HIGH;
        GPIO_Initure.Alternate = GPIO_AF12_FSMC;
        HAL_GPIO_Init(GPIOG, &GPIO_Initure);
        
        //init PE7,8,9,10,11,12,13,14,15
        GPIO_Initure.Pin = 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_Initure.Mode = GPIO_MODE_AF_PP;
        GPIO_Initure.Pull = GPIO_PULLUP;
        GPIO_Initure.Speed = GPIO_SPEED_HIGH;
        GPIO_Initure.Alternate = GPIO_AF12_FSMC;
        HAL_GPIO_Init(GPIOE, &GPIO_Initure);
}

SRAM_HandleTypeDef SRAM_Handler;

void _lcd_low_level_init(void)
{
        GPIO_InitTypeDef GPIO_Initure;

FSMC_NORSRAM_TimingTypeDef FSMC_ReadWriteTim;
        FSMC_NORSRAM_TimingTypeDef FSMC_WriteTim;

__HAL_RCC_GPIOB_CLK_ENABLE();
        GPIO_Initure.Pin = GPIO_PIN_15;
        GPIO_Initure.Mode = GPIO_MODE_OUTPUT_PP;
        GPIO_Initure.Pull = GPIO_PULLUP;
        GPIO_Initure.Speed = GPIO_SPEED_HIGH;
        HAL_GPIO_Init(GPIOB, &GPIO_Initure);

SRAM_Handler.Instance = FSMC_NORSRAM_DEVICE;
        SRAM_Handler.Extended = FSMC_NORSRAM_EXTENDED_DEVICE;

SRAM_Handler.Init.NSBank = FSMC_NORSRAM_BANK4;
        SRAM_Handler.Init.DataAddressMux = FSMC_DATA_ADDRESS_MUX_DISABLE;
        SRAM_Handler.Init.MemoryType = FSMC_MEMORY_TYPE_SRAM;
        SRAM_Handler.Init.MemoryDataWidth = FSMC_NORSRAM_MEM_BUS_WIDTH_16;
        SRAM_Handler.Init.BurstAccessMode = FSMC_BURST_ACCESS_MODE_DISABLE;
        SRAM_Handler.Init.WaitSignalPolarity = FSMC_WAIT_SIGNAL_POLARITY_LOW;
    SRAM_Handler.Init.AsynchronousWait = FSMC_ASYNCHRONOUS_WAIT_DISABLE;
        SRAM_Handler.Init.WrapMode=FSMC_WRAP_MODE_DISABLE;//ADD
        
        SRAM_Handler.Init.WaitSignalActive = FSMC_WAIT_TIMING_BEFORE_WS;
        SRAM_Handler.Init.WriteOperation = FSMC_WRITE_OPERATION_ENABLE;
        SRAM_Handler.Init.WaitSignal = FSMC_WAIT_SIGNAL_DISABLE;
        SRAM_Handler.Init.ExtendedMode = FSMC_EXTENDED_MODE_ENABLE;
        SRAM_Handler.Init.WriteBurst = FSMC_WRITE_BURST_DISABLE;
//        SRAM_Handler.Init.ContinuousClock = FSMC_CONTINUOUS_CLOCK_SYNC_ASYNC;

FSMC_ReadWriteTim.AddressSetupTime = 0x0F;
        FSMC_ReadWriteTim.AddressHoldTime = 0x00;
//        FSMC_ReadWriteTim.DataSetupTime = 0x46;
        FSMC_ReadWriteTim.DataSetupTime = 60;
        FSMC_ReadWriteTim.AccessMode = FSMC_ACCESS_MODE_A;

FSMC_WriteTim.AddressSetupTime = 9;//0x0F;
        FSMC_WriteTim.AddressHoldTime = 0x00;
        FSMC_WriteTim.DataSetupTime = 8;//0x0F;
        FSMC_WriteTim.AccessMode = FSMC_ACCESS_MODE_A;
        HAL_SRAM_Init(&SRAM_Handler, &FSMC_ReadWriteTim, &FSMC_WriteTim);
        delay_ms(50);
        ili9341_write_reg_with_value(0x0000,0x0001);
        delay_ms(50);
        ili9341_write_reg(0x000);
        delay_us(5);
        lcddev.id =ili9341_read_ram();

ili9341_write_reg(0XD3);
        lcddev.id = ili9341_read_ram();
        lcddev.id = ili9341_read_ram();
        lcddev.id = ili9341_read_ram();
        lcddev.id <<= 8;
        lcddev.id |= ili9341_read_ram();

DEBUG_PRINTF(" LCD ID:%x <br>", lcddev.id); //LCD ID

```

[drv_lcd.c](/uploads/201904/26/133850rm6qu07ailj0qgdt.attach)
[drv_lcd.h](/uploads/201904/26/133851vd7za0mm0ocn40so.attach)
![1556257184(1).jpg](/uploads/201904/26/133957pr3g3jua73xa77e7.jpg)