【AT-START-F425测评】+软硬件SPI驱动（ST7735）1.8吋TFT LCD

freeelectron 发表于 2022-5-23 17:42

<font style="overflow-wrap:break-word; word-break:break-all; color:#444444; font-family:Tahoma, "Microsoft Yahei", Simsun; font-style:normal; font-variant-ligatures:normal; font-weight:400; text-align:start; white-space:normal; background-color:#f2f9fd; text-decoration-thickness:initial; text-decoration-style:initial; text-decoration-color:initial">1、硬件连接<br style="overflow-wrap:break-word; word-break:break-all; color:#444444; font-family:Tahoma, "Microsoft Yahei", Simsun; font-size:16px; font-style:normal; font-variant-ligatures:normal; font-weight:400; text-align:start; white-space:normal; background-color:#f2f9fd; text-decoration-thickness:initial; text-decoration-style:initial; text-decoration-color:initial" />
GND         GND<br style="overflow-wrap:break-word; word-break:break-all; color:#444444; font-family:Tahoma, "Microsoft Yahei", Simsun; font-size:16px; font-style:normal; font-variant-ligatures:normal; font-weight:400; text-align:start; white-space:normal; background-color:#f2f9fd; text-decoration-thickness:initial; text-decoration-style:initial; text-decoration-color:initial" />
3.3V         VCC  <br style="overflow-wrap:break-word; word-break:break-all; color:#444444; font-family:Tahoma, "Microsoft Yahei", Simsun; font-size:16px; font-style:normal; font-variant-ligatures:normal; font-weight:400; text-align:start; white-space:normal; background-color:#f2f9fd; text-decoration-thickness:initial; text-decoration-style:initial; text-decoration-color:initial" />
PA5          SCL<br style="overflow-wrap:break-word; word-break:break-all; color:#444444; font-family:Tahoma, "Microsoft Yahei", Simsun; font-size:16px; font-style:normal; font-variant-ligatures:normal; font-weight:400; text-align:start; white-space:normal; background-color:#f2f9fd; text-decoration-thickness:initial; text-decoration-style:initial; text-decoration-color:initial" />
PA7         SDA<br style="overflow-wrap:break-word; word-break:break-all; color:#444444; font-family:Tahoma, "Microsoft Yahei", Simsun; font-size:16px; font-style:normal; font-variant-ligatures:normal; font-weight:400; text-align:start; white-space:normal; background-color:#f2f9fd; text-decoration-thickness:initial; text-decoration-style:initial; text-decoration-color:initial" />
PB0         ERS(复位)<br style="overflow-wrap:break-word; word-break:break-all; color:#444444; font-family:Tahoma, "Microsoft Yahei", Simsun; font-size:16px; font-style:normal; font-variant-ligatures:normal; font-weight:400; text-align:start; white-space:normal; background-color:#f2f9fd; text-decoration-thickness:initial; text-decoration-style:initial; text-decoration-color:initial" />
PB1         DC(命令数据选择)<br style="overflow-wrap:break-word; word-break:break-all; color:#444444; font-family:Tahoma, "Microsoft Yahei", Simsun; font-size:16px; font-style:normal; font-variant-ligatures:normal; font-weight:400; text-align:start; white-space:normal; background-color:#f2f9fd; text-decoration-thickness:initial; text-decoration-style:initial; text-decoration-color:initial" />
PA4         CS(片选)      <br style="overflow-wrap:break-word; word-break:break-all; color:#444444; font-family:Tahoma, "Microsoft Yahei", Simsun; font-size:16px; font-style:normal; font-variant-ligatures:normal; font-weight:400; text-align:start; white-space:normal; background-color:#f2f9fd; text-decoration-thickness:initial; text-decoration-style:initial; text-decoration-color:initial" />
PB2         BL(背光)   

<br style="overflow-wrap:break-word; word-break:break-all; color:#444444; font-family:Tahoma, "Microsoft Yahei", Simsun; font-size:16px; font-style:normal; font-variant-ligatures:normal; font-weight:400; text-align:start; white-space:normal; background-color:#f2f9fd; text-decoration-thickness:initial; text-decoration-style:initial; text-decoration-color:initial" />
<font style="overflow-wrap:break-word; word-break:break-all; color:#444444; font-family:Tahoma, "Microsoft Yahei", Simsun; font-style:normal; font-variant-ligatures:normal; font-weight:400; text-align:start; white-space:normal; background-color:#f2f9fd; text-decoration-thickness:initial; text-decoration-style:initial; text-decoration-color:initial">2、字库取摸方式<br style="overflow-wrap:break-word; word-break:break-all; color:#444444; font-family:Tahoma, "Microsoft Yahei", Simsun; font-size:16px; font-style:normal; font-variant-ligatures:normal; font-weight:400; text-align:start; white-space:normal; background-color:#f2f9fd; text-decoration-thickness:initial; text-decoration-style:initial; text-decoration-color:initial" />
取模方式：阴码、逆向、列行式<br style="overflow-wrap:break-word; word-break:break-all; color:#444444; font-family:Tahoma, "Microsoft Yahei", Simsun; font-size:16px; font-style:normal; font-variant-ligatures:normal; font-weight:400; text-align:start; white-space:normal; background-color:#f2f9fd; text-decoration-thickness:initial; text-decoration-style:initial; text-decoration-color:initial" />
使用PCtoLCD2002软件取摸。

  

<font style="overflow-wrap:break-word; word-break:break-all; color:#444444; font-family:Tahoma, "Microsoft Yahei", Simsun; font-style:normal; font-variant-ligatures:normal; font-weight:400; text-align:start; white-space:normal; background-color:#f2f9fd; text-decoration-thickness:initial; text-decoration-style:initial; text-decoration-color:initial">3、图片取摸<br style="overflow-wrap:break-word; word-break:break-all; color:#444444; font-family:Tahoma, "Microsoft Yahei", Simsun; font-size:16px; font-style:normal; font-variant-ligatures:normal; font-weight:400; text-align:start; white-space:normal; background-color:#f2f9fd; text-decoration-thickness:initial; text-decoration-style:initial; text-decoration-color:initial" />
水平扫描，16位真彩色  <br style="overflow-wrap:break-word; word-break:break-all; color:#444444; font-family:Tahoma, "Microsoft Yahei", Simsun; font-size:16px; font-style:normal; font-variant-ligatures:normal; font-weight:400; text-align:start; white-space:normal; background-color:#f2f9fd; text-decoration-thickness:initial; text-decoration-style:initial; text-decoration-color:initial" />
使用Image2Lcd取摸



 <font style="overflow-wrap:break-word; word-break:break-all; color:#444444; font-family:Tahoma, "Microsoft Yahei", Simsun; font-style:normal; font-variant-ligatures:normal; font-weight:400; text-align:start; white-space:normal; background-color:#f2f9fd; text-decoration-thickness:initial; text-decoration-style:initial; text-decoration-color:initial">4、代码实现<br style="overflow-wrap:break-word; word-break:break-all; color:#444444; font-family:Tahoma, "Microsoft Yahei", Simsun; font-size:16px; font-style:normal; font-variant-ligatures:normal; font-weight:400; text-align:start; white-space:normal; background-color:#f2f9fd; text-decoration-thickness:initial; text-decoration-style:initial; text-decoration-color:initial" />
（1）IO以及SPI初始化<br style="overflow-wrap:break-word; word-break:break-all; color:#444444; font-family:Tahoma, "Microsoft Yahei", Simsun; font-size:16px; font-style:normal; font-variant-ligatures:normal; font-weight:400; text-align:start; white-space:normal; background-color:#f2f9fd; text-decoration-thickness:initial; text-decoration-style:initial; text-decoration-color:initial" />
代码兼容软件SPI和硬件SPI两种方式，通过宏<font style="overflow-wrap:break-word; word-break:break-all; color:#444444; font-family:Tahoma, "Microsoft Yahei", Simsun; font-style:normal; font-variant-ligatures:normal; font-weight:400; text-align:start; white-space:normal; background-color:#f2f9fd; text-decoration-thickness:initial; text-decoration-style:initial; text-decoration-color:initial">SOFTWARE_SPI_ENABLE选择。

<pre>
<code class="language-cpp">void LcdIoInit(void)
{

 gpio_init_type gpio_init_struct;

 /* enable the led clock */
 crm_periph_clock_enable(CRM_GPIOA_PERIPH_CLOCK, TRUE);
 crm_periph_clock_enable(CRM_GPIOB_PERIPH_CLOCK, TRUE);

 /* set default parameter */
 gpio_default_para_init(&gpio_init_struct);

#if SOFTWARE_SPI_ENABLE

 /* configure the led gpio */

 gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
 gpio_init_struct.gpio_out_type= GPIO_OUTPUT_PUSH_PULL;
 gpio_init_struct.gpio_mode = GPIO_MODE_OUTPUT;
 gpio_init_struct.gpio_pins = GPIO_PINS_4|GPIO_PINS_5|GPIO_PINS_7;
 gpio_init_struct.gpio_pull = GPIO_PULL_NONE;
 gpio_init(GPIOA, &gpio_init_struct);

 gpio_bits_set(GPIOA,GPIO_PINS_4|GPIO_PINS_5|GPIO_PINS_7);
#else

 /*SPI1 :

 PA4/CS

 PA5/SCK

 PA6/MISO

 PA7/MOSI

 */


 gpio_init_struct.gpio_out_type = GPIO_OUTPUT_PUSH_PULL;
 gpio_init_struct.gpio_pull = GPIO_PULL_UP;
 gpio_init_struct.gpio_mode = GPIO_MODE_OUTPUT;
 gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
 gpio_init_struct.gpio_pins = GPIO_PINS_4;
 gpio_init(GPIOA, &gpio_init_struct);

 gpio_bits_set(GPIOA,GPIO_PINS_4);

 gpio_pin_mux_config(GPIOA, GPIO_PINS_SOURCE5, GPIO_MUX_0);
 gpio_pin_mux_config(GPIOA, GPIO_PINS_SOURCE6, GPIO_MUX_0);
 gpio_pin_mux_config(GPIOA, GPIO_PINS_SOURCE7, GPIO_MUX_0);

 gpio_default_para_init(&gpio_init_struct);
 gpio_init_struct.gpio_out_type = GPIO_OUTPUT_PUSH_PULL;
 gpio_init_struct.gpio_pull = GPIO_PULL_DOWN;
 gpio_init_struct.gpio_mode = GPIO_MODE_MUX;
 gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
 gpio_init_struct.gpio_pins = GPIO_PINS_5;
 gpio_init(GPIOA, &gpio_init_struct);

 gpio_init_struct.gpio_out_type = GPIO_OUTPUT_PUSH_PULL;
 gpio_init_struct.gpio_pull = GPIO_PULL_UP;
 gpio_init_struct.gpio_mode = GPIO_MODE_MUX;
 gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
 gpio_init_struct.gpio_pins = GPIO_PINS_6;
 gpio_init(GPIOA, &gpio_init_struct);

 gpio_init_struct.gpio_out_type = GPIO_OUTPUT_PUSH_PULL;
 gpio_init_struct.gpio_pull = GPIO_PULL_UP;
 gpio_init_struct.gpio_mode = GPIO_MODE_MUX;

 gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;

 gpio_init_struct.gpio_pins = GPIO_PINS_7;

 gpio_init(GPIOA, &gpio_init_struct);





 spi_init_type spi_init_struct;

 crm_periph_clock_enable(CRM_SPI1_PERIPH_CLOCK, TRUE);

 spi_default_para_init(&spi_init_struct);

 spi_init_struct.transmission_mode = SPI_TRANSMIT_HALF_DUPLEX_TX;

 spi_init_struct.master_slave_mode = SPI_MODE_MASTER;

 spi_init_struct.mclk_freq_division = SPI_MCLK_DIV_2;

 spi_init_struct.first_bit_transmission = SPI_FIRST_BIT_MSB;

 spi_init_struct.frame_bit_num = SPI_FRAME_8BIT;

 spi_init_struct.clock_polarity = SPI_CLOCK_POLARITY_HIGH;//SPI_CLOCK_POLARITY_HIGH

 spi_init_struct.clock_phase = SPI_CLOCK_PHASE_2EDGE; //SPI_CLOCK_PHASE_2EDGE

 spi_init_struct.cs_mode_selection = SPI_CS_SOFTWARE_MODE;

 spi_init(SPI1, &spi_init_struct);

 spi_enable(SPI1, TRUE);



#endif



 gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;

 gpio_init_struct.gpio_out_type= GPIO_OUTPUT_PUSH_PULL;

 gpio_init_struct.gpio_mode = GPIO_MODE_OUTPUT;

 gpio_init_struct.gpio_pins = GPIO_PINS_0|GPIO_PINS_1|GPIO_PINS_2;

 gpio_init_struct.gpio_pull = GPIO_PULL_NONE;

 gpio_init(GPIOB, &gpio_init_struct);



 gpio_bits_set(GPIOB,GPIO_PINS_0|GPIO_PINS_1|GPIO_PINS_2);

}</code></pre>

（2）SPI写数据

<pre>
<code class="language-cpp">void LCD_Writ_Bus(u8 dat)
{
 LCD_CS_LOW();

#if SOFTWARE_SPI_ENABLE


 u8 i;
 for(i=0;i<8;i++)
 {
 LCD_SCLK_LOW();
 if(dat&0x80)
 {
 LCD_MOSI_HIGH();
 }
 else
 {
 LCD_MOSI_LOW();
 }
 LCD_SCLK_HIGH();
 dat<<=1;
 }
#else

spi_i2s_data_transmit(SPI1, dat);

while(spi_i2s_flag_get(SPI1, SPI_I2S_TDBE_FLAG) == RESET) {};
#endif
 LCD_CS_HIGH();
}</code></pre>

（3）测试代码

<pre>
<code>void LcdTest(void)
{

 LcdInit();//LCD初始化
 LcdFill(0,0,LCD_W,LCD_H,BLACK);

 LcdShow16x16Hz(40, 0, 4, YELLOW, BLACK);
 LcdShow16x16Hz(56, 0, 5, YELLOW, BLACK);
 LcdShow16x16Hz(72, 0, 6, YELLOW, BLACK);

 LcdShowString(32,24,"AT32F425",BLUE, BLACK,16);
 LcdShowImage (14,60, 100, 93, gImage_zan);
}</code></pre>

5、现象

wangerxian 发表于 2022-5-23 18:52

这个彩屏不错，屏幕显示应该有相应的库吧？

freeelectron 发表于 2022-5-23 19:01

wangerxian 发表于 2022-5-23 18:52
这个彩屏不错，屏幕显示应该有相应的库吧？

 

spi部分与具体的mcu有关，其他初始化流程之类的，参考厂家的就行

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【AT-START-F425测评】+软硬件SPI驱动（ST7735）1.8吋TFT LCD