STM32G431使用问题：RT-Thread + U8G2 + ST7735（160x80）LCD

发布于 2019-11-09 06:11:33 浏览：3172 订阅该版

STM32G431使用问题：RT-Thread + U8G2 + ST7735（160x80）LCD
SPI_CLOCK = PA5;
SPI_DATA = PA7;
SPI_DC = PC4;
SPI_CS = A4;

static const u8x8_display_info_t u8x8_st7735_160x80_display_info =
{
		0,			/* chip_enable_level = */ 
		1,			/* chip_disable_level = */ 
		5,			/* post_chip_enable_wait_ns = */ 
		5,			/* pre_chip_disable_wait_ns = */ 
		1,			/* reset_pulse_width_ms = */ 
		6,			/* post_reset_wait_ms = */ 
		20,			/* sda_setup_time_ns = */ 
		100,  		/* sck_pulse_width_ns = */  	/* datasheet ST7586S */
		20000000UL,	/* sck_clock_hz = */  /* since Arduino 1.6.0, the SPI bus speed in Hz. Should be  1000000000/sck_pulse_width_ns */
					/* ST7735+STM32G431RBT6 works with 42MHz or 20MHZ */
		1,   			/* spi_mode = 1 */ 	/* active high, rising edge */
		4,			/* i2c_bus_clock_100kHz = */ 
		20, 			/* data_setup_time_ns = */ /* datasheet suggests min 20 */
		40,			/* write_pulse_width_ns = */ 
		48,			/* tile_width = */ 
		17,			/* tile_height = */ 
		0,			/* default_x_offset = */ 
		0,			/* flipmode_x_offset = */ 
		160,			/* pixel_width = */ 
		80			/* pixel_height = */ 
};

info mode 改1，CLK改20000000。
SPI_DATA 输出一直为低。。
但不使用U8G2，RT-Thread+ ST7735动作都正常。
找了几天Bug，都找不到！
有高手能帮忙解？