alvinlbl 创建的主题

@alvinlbl 这个pmu指的是外置的电池管理pmu，内置的pmu不会使用twi控制输出。

https://r128.docs.aw-ol.com/peripheral/pmu/

@ming899 uboot的屏幕 LCD_WRITE_COMMAND 初始化里加一个delay

//three line 9bit mode static void LCD_WRITE_DATA(u32 value) { u32 i; TL032FWV01_spi_cs_0; TL032FWV01_spi_sdi_1; TL032FWV01_spi_scl_0; sunxi_lcd_delay_us(10); TL032FWV01_spi_scl_1; for (i = 0; i < 8; i++) { sunxi_lcd_delay_us(10); if (value & 0x80) TL032FWV01_spi_sdi_1; else TL032FWV01_spi_sdi_0; value <<= 1; TL032FWV01_spi_scl_0; sunxi_lcd_delay_us(10); TL032FWV01_spi_scl_1; } sunxi_lcd_delay_us(10); TL032FWV01_spi_cs_1; } static void LCD_WRITE_COMMAND(u32 value) { u32 i; sunxi_lcd_delay_ms(10); // 延时一下 TL032FWV01_spi_cs_0; TL032FWV01_spi_sdi_0; TL032FWV01_spi_scl_0; sunxi_lcd_delay_us(10); TL032FWV01_spi_scl_1; for (i = 0; i < 8; i++) { sunxi_lcd_delay_us(10); if (value & 0x80) TL032FWV01_spi_sdi_1; else TL032FWV01_spi_sdi_0; TL032FWV01_spi_scl_0; sunxi_lcd_delay_us(10); TL032FWV01_spi_scl_1; value <<= 1; } sunxi_lcd_delay_us(10); TL032FWV01_spi_cs_1; }