全志 H5 orangepi SPI显示屏驱动测试

在内核目录，修改spi的设备树文件
linux/arch/arm64/boot/dts/allwiner/sun50i-h5-nanopi-neo2.dts

&spi1 { #address-cells = <1>; #size-cells = <0>; status = "okay"; pinctrl-names = "default"; pinctrl-0 = <&spi1_pins &spi1_cs_pins>; cs-gpios = <&pio 0 11 GPIO_ACTIVE_HIGH>; //下文修改成这里设置的IO口号 spidev { compatible = "myspilcd"; reg = <0>; status = "okay"; spi-max-frequency = <400000>; dc-gpios = <&pio 0 18 GPIO_ACTIVE_HIGH>; reset-gpios = <&pio 0 12 GPIO_ACTIVE_HIGH>; spi-cpha; spi-cpol; buswidth = <8>; };}; &pio { ... spi1_cs_pins: spi1_cs_pins { pins = "PA11"; function = "gpio_out"; }; };

再修改linux/arch/arm64/boot/dts/allwinner/sunxi-h3-h5.dtsi

... spi1_pins: spi1 { pins = "PA15", "PA16", "PA14", "PA11"; function = "spi1"; }; ...

wydc，重新编译设备树

make dtbs ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-

将arch/arm64/boot/dts/allwinner/sun50i-h5-nanopi-neo2.dtb 文件拷贝到sd卡的第一个的分区，替换原来的的dtb文件，重启板子

spi屏接线：

板上引脚 图中引脚LED <------> 3.3V2SCK <------> SPI-CLKSDA <------> SPI-MOSIAO <------> IO-5RESET <------> SDACS <------> SCLGND <------> GND2VCC <------> 3.3V1

测试代码：

#include <linux/init.h>#include <linux/module.h>#include <linux/spi/spi.h>#include <linux/delay.h>#include <linux/gpio.h>typedef struct { struct gpio_desc *dc; struct gpio_desc *rest;}mydata_t; struct lcd_cmd{ u8 addr; u8 len; u32 delay;}regdatas[] = { {0x11,0,120},{0xb1,3,0}, {0xb2,3,0},{0xb3,6,0}, {0xb4,1,0},{0xc0,3,0}, {0xc1,1,0},{0xc2,2,0}, {0xc3,2,0},{0xc4,2,0}, {0xc5,1,0},{0x36,1,0}, {0xe0,16,0},{0xe1,16,0}, {0x2a,4,0},{0x2b,4,0}, {0xf0,1,0},{0xf6,1,0}, {0x3a,1,0},{0x29,0,0},};static u8 lcd_datas[] = { 0x01,失眠的小熊猫,0x2d, //b1 0x01,失眠的小熊猫,0x2d, //b2 0x01,失眠的小熊猫,0x2d,0x01,失眠的小熊猫,0x2d, //b3 0x07, //b4 0xa2,0x02,0x84, //c0 0xc5, //c1 0x0a,0x00, //c2 0x8a,0x2a, //c3 0x8a,0xee, //c4 0x0e, //c5 0xc0, //36 0x0f,rqddm,0x0f,0x18,0x2f,0x28,0x20,0x22, //e0 0x1f,yjddy,0x23,0x37,0x00,0x07,0x02,0x10, 0x0f,yjddy,0x0f,0x17,0x33,失眠的小熊猫,0x29,0x2e, //e1 0x30,0x30,0x39,0x3f,0x00,0x07,0x03,0x10, 0x00,0x00,0x00,0x7f, //2a 0x00,0x00,0x00,0x9f, //2b 0x01, //f0 0x00, //f6 0x05, //3a};void reset_lcd(mydata_t *mydata){ gpiod_set_value(mydata->rest,0); msleep(100); gpiod_set_value(mydata->rest,1); msleep(100);}void write_command(struct spi_device *spi,u8 addr){ mydata_t *mydata = spi_get_drvdata(spi); gpiod_set_value(mydata->dc,0); spi_write(spi,&addr,1);}void write_data(struct spi_device *spi,u8 data){ mydata_t *mydata = spi_get_drvdata(spi); gpiod_set_value(mydata->dc,1); spi_write(spi,&data,1);}void init_lcd(struct spi_device *spi,mydata_t *mydata){ int i,j,k = 0; reset_lcd(mydata); for(i = 0;i < ARRAY_SIZE(regdatas);i ++) { //write command write_command(spi,regdatas[i].addr); for(j = 0;j < regdatas[i].len;j ++) { write_data(spi,lcd_datas[kxndy); } if(regdatas[i].delay) msleep(regdatas[i].delay); } }