add: 04_I2C/14_使用GPIO操作I2C设备_基于IMX6ULL,14_使用GPIO操作I2C设备_基于STM32MP157

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weidongshan
2021-03-13 16:44:09 +08:00
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## 使用GPIO操作I2C设备_IMX6ULL
参考资料:
* i2c_spec.pdf
* Linux文档
* `Linux-5.4\Documentation\devicetree\bindings\i2c\i2c-gpio.yaml`
* `Linux-4.9.88\Documentation\devicetree\bindings\i2c\i2c-gpio.txt`
* Linux驱动源码
* `Linux-5.4\drivers\i2c\busses\i2c-gpio.c`
* `Linux-4.9.88\drivers\i2c\busses\i2c-gpio.c`
* 扩展板原理图:`imx6ull_extend_v10.pdf`
* 本节对应的代码:
* `doc_and_source_for_drivers\IMX6ULL\source\04_I2C\07_i2c_gpio_dts_imx6ull`
### 1. 硬件连接
* IMX6ULL把I2C模块接到GPIO
![image-20210312183125738](pic/04_I2C/066_use_gpio_for_i2c_module_imx6ull.png)
### 2. 根据原理图编写设备树
#### 2.1 原理图
![image-20210312183749002](pic/04_I2C/068_gpios_for_i2c_imx6ull.png)
#### 2.2 编写设备树
```shell
i2c_gpio_100ask {
compatible = "i2c-gpio";
gpios = <&gpio4 20 0 /* sda */
&gpio4 21 0 /* scl */
>;
i2c-gpio,delay-us = <5>; /* ~100 kHz */
#address-cells = <1>;
#size-cells = <0>;
};
```
把上述代码,放入`arch/arm/boot/dts/100ask_imx6ull-14x14.dts`的根节点下面。
### 3. 确认内核已经配置了I2C-GPIO
查看内核目录下的`.config`,如果未设置`CONFIG_I2C_GPIO`上机实验时需要配置内核、编译I2C-GPIO驱动。
### 4. 上机实验
#### 4.1 设置工具链
* IMX6ULL
```shell
export ARCH=arm
export CROSS_COMPILE=arm-linux-gnueabihf-
export PATH=$PATH:/home/book/100ask_imx6ull-sdk/ToolChain/gcc-linaro-6.2.1-2016.11-x86_64_arm-linux-gnueabihf/bin
```
#### 4.2 编译、替换设备树
* 编译设备树:
在Ubuntu的IMX6ULL内核目录下执行如下命令,
得到设备树文件:`arch/arm/boot/dts/100ask_imx6ull-14x14.dtb`
```shell
make dtbs
```
* 复制到NFS目录
```shell
$ cp arch/arm/boot/dts/100ask_imx6ull-14x14.dtb ~/nfs_rootfs/
```
* 开发板上挂载NFS文件系统
* vmware使用NAT(假设windowsIP为192.168.1.100)
```shell
[root@100ask:~]# mount -t nfs -o nolock,vers=3,port=2049,mountport=9999
192.168.1.100:/home/book/nfs_rootfs /mnt
```
* vmware使用桥接或者不使用vmware而是直接使用服务器假设Ubuntu IP为192.168.1.137
```shell
[root@100ask:~]# mount -t nfs -o nolock,vers=3 192.168.1.137:/home/book/nfs_rootfs /mnt
```
* 更新设备树
```shell
[root@100ask:~]# cp /mnt/100ask_imx6ull-14x14.dtb /boot
[root@100ask:~]# sync
```
* 重启开发板
#### 4.3 编译I2C-GPIO驱动
##### 1. 配置内核
在IMX6ULL内核源码目录下执行`make menuconfig`命令,如下配置内核:
```shell
Device Drivers --->
I2C support --->
I2C Hardware Bus support --->
<M> GPIO-based bitbanging I2C // 输入M编译为模块
```
##### 2. 编译模块
设置工具链后,在内核目录下执行:
```shell
make modules // 得到 drivers/i2c/busses/i2c-gpio.ko
```
#### 5. 测试
在开发板上执行:
```shell
[root@100ask:~]# i2cdetect -l // 加载i2c-gpio.ko前只看到2条I2C BUS
i2c-1 i2c 21a4000.i2c I2C adapter
i2c-0 i2c 21a0000.i2c I2C adapter
[root@100ask:~]#
[root@100ask:~]# insmod /mnt/i2c-gpio.ko
[ 45.067602] i2c-gpio i2c_gpio_100ask: using pins 116 (SDA) and 117 (SCL)
[root@100ask:~]# i2cdetect -l // 加载i2c-gpio.ko后看到3条I2C BUS
i2c-1 i2c 21a4000.i2c I2C adapter
i2c-4 i2c i2c_gpio_100ask I2C adapter
i2c-0 i2c 21a0000.i2c I2C adapter
[root@100ask:~]#
[root@100ask:~]# i2cdetect -y 4 // 检测到0x50的设备
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: 50 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
[root@100ask:~]#
[root@100ask:~]# i2cset -f -y 4 0x50 0 0x55 // 往0地址写入0x55
[root@100ask:~]# i2cget -f -y 4 0x50 0 // 读0地址
0x55
```

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/*
* Copyright (C) 2016 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/dts-v1/;
#include <dt-bindings/input/input.h>
#include "imx6ull.dtsi"
/ {
model = "Freescale i.MX6 ULL 14x14 EVK Board";
compatible = "fsl,imx6ull-14x14-evk", "fsl,imx6ull";
i2c-bus-virtual {
compatible = "100ask,i2c-bus-virtual";
};
chosen {
stdout-path = &uart1;
};
i2c_gpio_100ask {
compatible = "i2c-gpio";
gpios = <&gpio4 20 0 /* sda */
&gpio4 21 0 /* scl */
>;
i2c-gpio,delay-us = <5>; /* ~100 kHz */
#address-cells = <1>;
#size-cells = <0>;
};
memory {
reg = <0x80000000 0x20000000>;
};
reserved-memory {
#address-cells = <1>;
#size-cells = <1>;
ranges;
linux,cma {
compatible = "shared-dma-pool";
reusable;
size = <0x14000000>;
linux,cma-default;
};
};
backlight {
compatible = "pwm-backlight";
pwms = <&pwm1 0 1000>;
brightness-levels = <0 1 2 3 4 5 6 8 10>;
default-brightness-level = <8>;
status = "okay";
};
pxp_v4l2 {
compatible = "fsl,imx6ul-pxp-v4l2", "fsl,imx6sx-pxp-v4l2", "fsl,imx6sl-pxp-v4l2";
status = "okay";
};
regulators {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <0>;
reg_can_3v3: regulator@0 {
compatible = "regulator-fixed";
reg = <0>;
regulator-name = "can-3v3";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
};
reg_usb_ltemodule: regulator@1 {
compatible = "regulator-fixed";
regulator-name = "ltemodule-pwr";
regulator-min-microvolt = <3800000>;
regulator-max-microvolt = <3800000>;
gpios = <&gpio5 5 GPIO_ACTIVE_HIGH>;
enable-active-high;
regulator-boot-on;
};
reg_gpio_wifi: regulator@2 {
compatible = "regulator-fixed";
regulator-name = "wifi-pwr";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
gpios = <&gpio1 10 GPIO_ACTIVE_LOW>;
regulator-boot-on;
};
};
leds {
compatible = "gpio-leds";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_leds>;
status = "disabled";
led0: cpu {
label = "cpu";
gpios = <&gpio5 3 GPIO_ACTIVE_LOW>;
default-state = "on";
linux,default-trigger = "heartbeat";
};
};
gpio-keys {
compatible = "gpio-keys";
pinctrl-names = "default";
user1 {
label = "User1 Button";
gpios = <&gpio5 1 GPIO_ACTIVE_LOW>;
gpio-key,wakeup;
linux,code = <KEY_1>;
};
user2 {
label = "User2 Button";
gpios = <&gpio4 14 GPIO_ACTIVE_LOW>;
gpio-key,wakeup;
linux,code = <KEY_2>;
};
};
sound {
compatible = "fsl,imx6ul-evk-wm8960",
"fsl,imx-audio-wm8960";
model = "wm8960-audio";
cpu-dai = <&sai2>;
audio-codec = <&codec>;
asrc-controller = <&asrc>;
codec-master;
gpr = <&gpr 4 0x100000 0x100000>;
hp-det = <3 0>;
/*hp-det-gpios = <&gpio5 4 0>;
mic-det-gpios = <&gpio5 4 0>;*/
audio-routing =
"Headphone Jack", "HP_L",
"Headphone Jack", "HP_R",
"Ext Spk", "SPK_LP",
"Ext Spk", "SPK_LN",
"Ext Spk", "SPK_RP",
"Ext Spk", "SPK_RN",
"LINPUT2", "Mic Jack",
"LINPUT3", "Mic Jack",
"RINPUT1", "Main MIC",
"RINPUT2", "Main MIC",
"Mic Jack", "MICB",
"Main MIC", "MICB",
"CPU-Playback", "ASRC-Playback",
"Playback", "CPU-Playback",
"ASRC-Capture", "CPU-Capture",
"CPU-Capture", "Capture";
status = "okay";
};
spi4 {
compatible = "spi-gpio";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_spi4>;
pinctrl-assert-gpios = <&gpio5 8 GPIO_ACTIVE_LOW>;
status = "okay";
gpio-sck = <&gpio5 11 0>;
gpio-mosi = <&gpio5 10 0>;
cs-gpios = <&gpio5 7 0>;
num-chipselects = <1>;
#address-cells = <1>;
#size-cells = <0>;
gpio_spi: gpio_spi@0 {
compatible = "fairchild,74hc595";
gpio-controller;
#gpio-cells = <2>;
reg = <0>;
registers-number = <1>;
registers-default = /bits/ 8 <0x57>;
spi-max-frequency = <10000>;
};
};
sii902x_reset: sii902x-reset {
compatible = "gpio-reset";
reset-gpios = <&gpio_spi 1 GPIO_ACTIVE_LOW>;
reset-delay-us = <100000>;
#reset-cells = <0>;
status = "okay";
};
};
&i2c1 {
ap3216c@1e {
compatible = "lite-on,ap3216c";
reg = <0x1e>;
};
};
&gpmi{
status = "disabled";
};
&cpu0 {
arm-supply = <&reg_arm>;
soc-supply = <&reg_soc>;
};
&clks {
assigned-clocks = <&clks IMX6UL_CLK_PLL4_AUDIO_DIV>;
assigned-clock-rates = <786432000>;
};
&fec1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_enet1>;
phy-mode = "rmii";
phy-handle = <&ethphy0>;
phy-reset-gpios = <&gpio5 9 GPIO_ACTIVE_LOW>;
phy-reset-duration = <26>;
status = "okay";
};
&fec2 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_enet2>;
phy-mode = "rmii";
phy-handle = <&ethphy1>;
phy-reset-gpios = <&gpio5 6 GPIO_ACTIVE_LOW>;
phy-reset-duration = <26>;
status = "okay";
mdio {
#address-cells = <1>;
#size-cells = <0>;
ethphy0: ethernet-phy@0 {
compatible = "ethernet-phy-ieee802.3-c22";
smsc,disable-energy-detect;
reg = <0>;
};
ethphy1: ethernet-phy@1 {
compatible = "ethernet-phy-ieee802.3-c22";
smsc,disable-energy-detect;
reg = <1>;
};
};
};
&flexcan1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_flexcan1>;
xceiver-supply = <&reg_can_3v3>;
status = "okay";
};
&gpc {
fsl,cpu_pupscr_sw2iso = <0x1>;
fsl,cpu_pupscr_sw = <0x0>;
fsl,cpu_pdnscr_iso2sw = <0x1>;
fsl,cpu_pdnscr_iso = <0x1>;
fsl,ldo-bypass = <0>; /* DCDC, ldo-enable */
};
&i2c1 {
clock-frequency = <100000>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_i2c1>;
status = "okay";
};
&i2c2 {
clock_frequency = <100000>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_i2c2>;
status = "okay";
codec: wm8960@1a {
compatible = "wlf,wm8960";
reg = <0x1a>;
clocks = <&clks IMX6UL_CLK_SAI2>;
clock-names = "mclk";
wlf,shared-lrclk;
};
sii902x: sii902x@39 {
compatible = "SiI,sii902x";
pinctrl-names = "default";
reset-names="sii902x";
pinctrl-0 = <&pinctrl_sii902x>;
resets = <&sii902x_reset>;
interrupt-parent = <&gpio1>;
interrupts = <18 IRQ_TYPE_EDGE_FALLING>;
mode_str ="1280x720M@60";
bits-per-pixel = <16>;
reg = <0x39>;
status = "okay";
};
gt9xx@5d {
compatible = "goodix,gt9xx";
reg = <0x5d>;
status = "okay";
interrupt-parent = <&gpio1>;
interrupts = <5 IRQ_TYPE_EDGE_FALLING>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_tsc_reset &pinctrl_touchscreen_int>;
/*pinctrl-1 = <&pinctrl_tsc_irq>;*/
/*pinctrl-names = "default", "int-output-low", "int-output-high", "int-input";
pinctrl-0 = <&ts_int_default>;
pinctrl-1 = <&ts_int_output_low>;
pinctrl-2 = <&ts_int_output_high>;
pinctrl-3 = <&ts_int_input>;
*/
reset-gpios = <&gpio5 2 GPIO_ACTIVE_LOW>;
irq-gpios = <&gpio1 5 IRQ_TYPE_EDGE_FALLING>;
irq-flags = <2>; /*1:rising 2: falling*/
touchscreen-max-id = <5>;
touchscreen-size-x = <800>;
touchscreen-size-y = <480>;
touchscreen-max-w = <1024>;
touchscreen-max-p = <1024>;
/*touchscreen-key-map = <172>, <158>;*/ /*KEY_HOMEPAGE, KEY_BACK*/
goodix,type-a-report = <0>;
goodix,driver-send-cfg = <0>;
goodix,create-wr-node = <1>;
goodix,wakeup-with-reset = <0>;
goodix,resume-in-workqueue = <0>;
goodix,int-sync = <0>;
goodix,swap-x2y = <0>;
goodix,esd-protect = <0>;
goodix,pen-suppress-finger = <0>;
goodix,auto-update = <0>;
goodix,auto-update-cfg = <0>;
goodix,power-off-sleep = <0>;
/*7*/
goodix,cfg-group0 = [
6b 00 04 58 02 05 0d 00 01 0f
28 0f 50 32 03 05 00 00 00 00
00 00 00 00 00 00 00 8a 2a 0c
45 47 0c 08 00 00 00 40 03 2c
00 01 00 00 00 03 64 32 00 00
00 28 64 94 d5 02 07 00 00 04
95 2c 00 8b 34 00 82 3f 00 7d
4c 00 7a 5b 00 7a 00 00 00 00
00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00
00 00 18 16 14 12 10 0e 0c 0a
08 06 04 02 ff ff 00 00 00 00
00 00 00 00 00 00 00 00 00 00
00 00 16 18 1c 1d 1e 1f 20 21
22 24 13 12 10 0f 0a 08 06 04
02 00 ff ff ff ff ff ff 00 00
00 00 00 00 00 00 00 00 00 00
00 00 00 00 79 01
];
/*4.3*/
goodix,cfg-group1 = [
97 E0 01 10 01 05 0D 00 01 00
00 05 5A 46 53 11 00 00 11 11
14 14 14 22 0A 04 00 00 00 00
00 00 53 00 14 00 00 84 00 00
3C 00 00 64 1E 28 87 27 08 32
34 05 0D 20 33 60 11 02 24 00
00 64 80 80 14 02 00 00 54 89
68 85 6D 82 72 80 76 7D 7B 7B
00 00 00 00 00 00 00 F0 50 3C
FF FF 07 00 00 00 02 14 14 03
04 00 21 64 0A 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00
32 20 50 3C 3C 00 00 00 00 00
0D 06 0C 05 0B 04 0A 03 FF FF
FF FF FF FF 00 01 02 03 04 05
06 07 08 09 0A 0B 0C 0D FF FF
FF FF FF FF FF FF FF FF FF FF
00 00 00 00 00 00 00 00 00 00
00 00 00 00 3C 00 05 1E 00 02
2A 1E 19 14 02 00 03 0A 05 00
00 00 00 00 00 00 01 FF FF 86
22 03 00 00 33 00 0F 00 00 00
50 3C 50 00 00 00 00 2A 01
];
/*5*/
goodix,cfg-group2 = [
00 20 03 E0 01 05 3C 00 01 08
28 0C 50 32 03 05 00 00 00 00
00 00 00 17 19 1E 14 8B 2B 0D
33 35 0C 08 00 00 00 9A 03 11
00 01 00 00 00 00 00 32 00 00
00 20 58 94 C5 02 00 00 00 04
B0 23 00 93 2B 00 7B 35 00 69
41 00 5B 4F 00 5B 00 00 00 00
00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00
00 00 02 04 06 08 0A 0C 0E 10
12 14 16 18 1A FF 00 00 00 00
00 00 00 00 00 00 00 00 00 00
00 00 00 02 04 06 08 0A 0C 0F
10 12 13 16 18 1C 1D 1E 1F 20
21 22 24 26 FF FF FF FF 00 00
00 FF FF FF FF FF FF FF FF FF
FF FF FF FF 48 01
];
};
};
&iomuxc {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_hog_1>;
imx6ul-evk {
pinctrl_hog_1: hoggrp-1 {
fsl,pins = <
MX6UL_PAD_UART1_RTS_B__GPIO1_IO19 0x17059 /* SD1 CD */
MX6UL_PAD_GPIO1_IO00__ANATOP_OTG1_ID 0x17059 /* USB OTG1 ID */
// MX6UL_PAD_CSI_DATA07__GPIO4_IO28 0x000010B0
MX6ULL_PAD_SNVS_TAMPER5__GPIO5_IO05 0x000110A0
>;
};
pinctrl_sii902x: hdmigrp {
fsl,pins = <
MX6UL_PAD_UART1_CTS_B__GPIO1_IO18 0x59
>;
};
pinctrl_touchscreen_int: lcdif_tsc_int {
fsl,pins = <
MX6UL_PAD_GPIO1_IO05__GPIO1_IO05 0x000010B0
>;
};
pinctrl_enet1: enet1grp {
fsl,pins = <
>;
};
pinctrl_enet2: enet2grp {
fsl,pins = <
MX6UL_PAD_GPIO1_IO06__ENET2_MDIO 0x1b0b0
MX6UL_PAD_GPIO1_IO07__ENET2_MDC 0x1b0b0
MX6UL_PAD_ENET2_RX_EN__ENET2_RX_EN 0x1b0b0
MX6UL_PAD_ENET2_RX_ER__ENET2_RX_ER 0x1b0b0
MX6UL_PAD_ENET2_RX_DATA0__ENET2_RDATA00 0x1b0b0
MX6UL_PAD_ENET2_RX_DATA1__ENET2_RDATA01 0x1b0b0
MX6UL_PAD_ENET2_TX_EN__ENET2_TX_EN 0x1b0b0
MX6UL_PAD_ENET2_TX_DATA0__ENET2_TDATA00 0x1b0b0
MX6UL_PAD_ENET2_TX_DATA1__ENET2_TDATA01 0x1b0b0
MX6UL_PAD_ENET2_TX_CLK__ENET2_REF_CLK2 0x4001b031
MX6UL_PAD_ENET1_RX_EN__ENET1_RX_EN 0x1b0b0
MX6UL_PAD_ENET1_RX_ER__ENET1_RX_ER 0x1b0b0
MX6UL_PAD_ENET1_RX_DATA0__ENET1_RDATA00 0x1b0b0
MX6UL_PAD_ENET1_RX_DATA1__ENET1_RDATA01 0x1b0b0
MX6UL_PAD_ENET1_TX_EN__ENET1_TX_EN 0x1b0b0
MX6UL_PAD_ENET1_TX_DATA0__ENET1_TDATA00 0x1b0b0
MX6UL_PAD_ENET1_TX_DATA1__ENET1_TDATA01 0x1b0b0
MX6UL_PAD_ENET1_TX_CLK__ENET1_REF_CLK1 0x4001b031
>;
};
pinctrl_flexcan1: flexcan1grp{
fsl,pins = <
MX6UL_PAD_UART3_CTS_B__FLEXCAN1_TX 0x000010B0
MX6UL_PAD_UART3_RTS_B__FLEXCAN1_RX 0x000010B0
>;
};
pinctrl_i2c1: i2c1grp {
fsl,pins = <
MX6UL_PAD_UART4_TX_DATA__I2C1_SCL 0x4001b8b0
MX6UL_PAD_UART4_RX_DATA__I2C1_SDA 0x4001b8b0
>;
};
pinctrl_i2c2: i2c2grp {
fsl,pins = <
MX6UL_PAD_UART5_TX_DATA__I2C2_SCL 0x4001b8b0
MX6UL_PAD_UART5_RX_DATA__I2C2_SDA 0x4001b8b0
>;
};
pinctrl_ecspi3: ecspi3 {
fsl,pins = <
MX6UL_PAD_UART2_CTS_B__ECSPI3_MOSI 0x000010B0
MX6UL_PAD_UART2_RTS_B__ECSPI3_MISO 0x000010B0
MX6UL_PAD_UART2_RX_DATA__ECSPI3_SCLK 0x000010B0
//MX6UL_PAD_UART2_TX_DATA__ECSPI3_SS0 0x000010B0
MX6UL_PAD_UART2_TX_DATA__GPIO1_IO20 0x000010B0
MX6UL_PAD_GPIO1_IO01__GPIO1_IO01 0x000010B0
>;
};
pinctrl_ecspi1: ecspi1 {
fsl,pins = <
MX6UL_PAD_CSI_DATA04__ECSPI1_SCLK 0x000010B0
MX6UL_PAD_CSI_DATA06__ECSPI1_MOSI 0x000010B0
MX6UL_PAD_CSI_DATA07__ECSPI1_MISO 0x000010B0
MX6UL_PAD_CSI_DATA05__GPIO4_IO26 0x000010B0
MX6UL_PAD_CSI_DATA03__GPIO4_IO24 0x000010B0
>;
};
pinctrl_uart3: uart3grp {
fsl,pins = <
MX6UL_PAD_UART3_TX_DATA__UART3_DCE_TX 0x1b0b1
MX6UL_PAD_UART3_RX_DATA__UART3_DCE_RX 0x1b0b1
>;
};
pinctrl_uart1: uart1grp {
fsl,pins = <
MX6UL_PAD_UART1_TX_DATA__UART1_DCE_TX 0x1b0b1
MX6UL_PAD_UART1_RX_DATA__UART1_DCE_RX 0x1b0b1
>;
};
pinctrl_uart6: uart6grp {
fsl,pins = <
MX6UL_PAD_CSI_MCLK__UART6_DCE_TX 0x1b0b1
MX6UL_PAD_CSI_PIXCLK__UART6_DCE_RX 0x1b0b1
>;
};
pinctrl_sai2: sai2grp {
fsl,pins = <
MX6UL_PAD_JTAG_TDI__SAI2_TX_BCLK 0x17088
MX6UL_PAD_JTAG_TDO__SAI2_TX_SYNC 0x17088
MX6UL_PAD_JTAG_TRST_B__SAI2_TX_DATA 0x11088
MX6UL_PAD_JTAG_TCK__SAI2_RX_DATA 0x11088
MX6UL_PAD_JTAG_TMS__SAI2_MCLK 0x17088
>;
};
pinctrl_tsc: tscgrp {
fsl,pins = <
MX6UL_PAD_GPIO1_IO01__GPIO1_IO01 0xb0
MX6UL_PAD_GPIO1_IO02__GPIO1_IO02 0xb0
MX6UL_PAD_GPIO1_IO03__GPIO1_IO03 0xb0
MX6UL_PAD_GPIO1_IO04__GPIO1_IO04 0xb0
>;
};
pinctrl_usdhc1: usdhc1grp {
fsl,pins = <
MX6UL_PAD_SD1_CMD__USDHC1_CMD 0x17059
MX6UL_PAD_SD1_CLK__USDHC1_CLK 0x10071
MX6UL_PAD_SD1_DATA0__USDHC1_DATA0 0x17059
MX6UL_PAD_SD1_DATA1__USDHC1_DATA1 0x17059
MX6UL_PAD_SD1_DATA2__USDHC1_DATA2 0x17059
MX6UL_PAD_SD1_DATA3__USDHC1_DATA3 0x17059
>;
};
pinctrl_usdhc1_100mhz: usdhc1grp100mhz {
fsl,pins = <
MX6UL_PAD_SD1_CMD__USDHC1_CMD 0x170b9
MX6UL_PAD_SD1_CLK__USDHC1_CLK 0x100b9
MX6UL_PAD_SD1_DATA0__USDHC1_DATA0 0x170b9
MX6UL_PAD_SD1_DATA1__USDHC1_DATA1 0x170b9
MX6UL_PAD_SD1_DATA2__USDHC1_DATA2 0x170b9
MX6UL_PAD_SD1_DATA3__USDHC1_DATA3 0x170b9
>;
};
pinctrl_usdhc1_200mhz: usdhc1grp200mhz {
fsl,pins = <
MX6UL_PAD_SD1_CMD__USDHC1_CMD 0x170f9
MX6UL_PAD_SD1_CLK__USDHC1_CLK 0x100f9
MX6UL_PAD_SD1_DATA0__USDHC1_DATA0 0x170f9
MX6UL_PAD_SD1_DATA1__USDHC1_DATA1 0x170f9
MX6UL_PAD_SD1_DATA2__USDHC1_DATA2 0x170f9
MX6UL_PAD_SD1_DATA3__USDHC1_DATA3 0x170f9
>;
};
pinctrl_usdhc2: usdhc2grp {
fsl,pins = <
MX6UL_PAD_NAND_RE_B__USDHC2_CLK 0x10069
MX6UL_PAD_NAND_WE_B__USDHC2_CMD 0x17059
MX6UL_PAD_NAND_DATA00__USDHC2_DATA0 0x17059
MX6UL_PAD_NAND_DATA01__USDHC2_DATA1 0x17059
MX6UL_PAD_NAND_DATA02__USDHC2_DATA2 0x17059
MX6UL_PAD_NAND_DATA03__USDHC2_DATA3 0x17059
>;
};
pinctrl_usdhc2_8bit: usdhc2grp_8bit {
fsl,pins = <
MX6UL_PAD_NAND_RE_B__USDHC2_CLK 0x10069
MX6UL_PAD_NAND_WE_B__USDHC2_CMD 0x17059
MX6UL_PAD_NAND_DATA00__USDHC2_DATA0 0x17059
MX6UL_PAD_NAND_DATA01__USDHC2_DATA1 0x17059
MX6UL_PAD_NAND_DATA02__USDHC2_DATA2 0x17059
MX6UL_PAD_NAND_DATA03__USDHC2_DATA3 0x17059
MX6UL_PAD_NAND_DATA04__USDHC2_DATA4 0x17059
MX6UL_PAD_NAND_DATA05__USDHC2_DATA5 0x17059
MX6UL_PAD_NAND_DATA06__USDHC2_DATA6 0x17059
MX6UL_PAD_NAND_DATA07__USDHC2_DATA7 0x17059
>;
};
pinctrl_usdhc2_8bit_100mhz: usdhc2grp_8bit_100mhz {
fsl,pins = <
MX6UL_PAD_NAND_RE_B__USDHC2_CLK 0x100b9
MX6UL_PAD_NAND_WE_B__USDHC2_CMD 0x170b9
MX6UL_PAD_NAND_DATA00__USDHC2_DATA0 0x170b9
MX6UL_PAD_NAND_DATA01__USDHC2_DATA1 0x170b9
MX6UL_PAD_NAND_DATA02__USDHC2_DATA2 0x170b9
MX6UL_PAD_NAND_DATA03__USDHC2_DATA3 0x170b9
MX6UL_PAD_NAND_DATA04__USDHC2_DATA4 0x170b9
MX6UL_PAD_NAND_DATA05__USDHC2_DATA5 0x170b9
MX6UL_PAD_NAND_DATA06__USDHC2_DATA6 0x170b9
MX6UL_PAD_NAND_DATA07__USDHC2_DATA7 0x170b9
>;
};
pinctrl_usdhc2_8bit_200mhz: usdhc2grp_8bit_200mhz {
fsl,pins = <
MX6UL_PAD_NAND_RE_B__USDHC2_CLK 0x100f9
MX6UL_PAD_NAND_WE_B__USDHC2_CMD 0x170f9
MX6UL_PAD_NAND_DATA00__USDHC2_DATA0 0x170f9
MX6UL_PAD_NAND_DATA01__USDHC2_DATA1 0x170f9
MX6UL_PAD_NAND_DATA02__USDHC2_DATA2 0x170f9
MX6UL_PAD_NAND_DATA03__USDHC2_DATA3 0x170f9
MX6UL_PAD_NAND_DATA04__USDHC2_DATA4 0x170f9
MX6UL_PAD_NAND_DATA05__USDHC2_DATA5 0x170f9
MX6UL_PAD_NAND_DATA06__USDHC2_DATA6 0x170f9
MX6UL_PAD_NAND_DATA07__USDHC2_DATA7 0x170f9
>;
};
pinctrl_lcdif_dat: lcdifdatgrp {
fsl,pins = <
MX6UL_PAD_LCD_DATA00__LCDIF_DATA00 0x79
MX6UL_PAD_LCD_DATA01__LCDIF_DATA01 0x79
MX6UL_PAD_LCD_DATA02__LCDIF_DATA02 0x79
MX6UL_PAD_LCD_DATA03__LCDIF_DATA03 0x79
MX6UL_PAD_LCD_DATA04__LCDIF_DATA04 0x79
MX6UL_PAD_LCD_DATA05__LCDIF_DATA05 0x79
MX6UL_PAD_LCD_DATA06__LCDIF_DATA06 0x79
MX6UL_PAD_LCD_DATA07__LCDIF_DATA07 0x79
MX6UL_PAD_LCD_DATA08__LCDIF_DATA08 0x79
MX6UL_PAD_LCD_DATA09__LCDIF_DATA09 0x79
MX6UL_PAD_LCD_DATA10__LCDIF_DATA10 0x79
MX6UL_PAD_LCD_DATA11__LCDIF_DATA11 0x79
MX6UL_PAD_LCD_DATA12__LCDIF_DATA12 0x79
MX6UL_PAD_LCD_DATA13__LCDIF_DATA13 0x79
MX6UL_PAD_LCD_DATA14__LCDIF_DATA14 0x79
MX6UL_PAD_LCD_DATA15__LCDIF_DATA15 0x79
MX6UL_PAD_LCD_DATA16__LCDIF_DATA16 0x79
MX6UL_PAD_LCD_DATA17__LCDIF_DATA17 0x79
MX6UL_PAD_LCD_DATA18__LCDIF_DATA18 0x79
MX6UL_PAD_LCD_DATA19__LCDIF_DATA19 0x79
MX6UL_PAD_LCD_DATA20__LCDIF_DATA20 0x79
MX6UL_PAD_LCD_DATA21__LCDIF_DATA21 0x79
MX6UL_PAD_LCD_DATA22__LCDIF_DATA22 0x79
MX6UL_PAD_LCD_DATA23__LCDIF_DATA23 0x79
>;
};
pinctrl_lcdif_dat_16bits: lcdifdatgrp_16bits {
fsl,pins = <
MX6UL_PAD_LCD_DATA00__LCDIF_DATA00 0x79
MX6UL_PAD_LCD_DATA01__LCDIF_DATA01 0x79
MX6UL_PAD_LCD_DATA02__LCDIF_DATA02 0x79
MX6UL_PAD_LCD_DATA03__LCDIF_DATA03 0x79
MX6UL_PAD_LCD_DATA04__LCDIF_DATA04 0x79
MX6UL_PAD_LCD_DATA05__LCDIF_DATA05 0x79
MX6UL_PAD_LCD_DATA06__LCDIF_DATA06 0x79
MX6UL_PAD_LCD_DATA07__LCDIF_DATA07 0x79
MX6UL_PAD_LCD_DATA08__LCDIF_DATA08 0x79
MX6UL_PAD_LCD_DATA09__LCDIF_DATA09 0x79
MX6UL_PAD_LCD_DATA10__LCDIF_DATA10 0x79
MX6UL_PAD_LCD_DATA11__LCDIF_DATA11 0x79
MX6UL_PAD_LCD_DATA12__LCDIF_DATA12 0x79
MX6UL_PAD_LCD_DATA13__LCDIF_DATA13 0x79
MX6UL_PAD_LCD_DATA14__LCDIF_DATA14 0x79
MX6UL_PAD_LCD_DATA15__LCDIF_DATA15 0x79
>;
};
pinctrl_lcdif_ctrl: lcdifctrlgrp {
fsl,pins = <
MX6UL_PAD_LCD_CLK__LCDIF_CLK 0x79
MX6UL_PAD_LCD_ENABLE__LCDIF_ENABLE 0x79
MX6UL_PAD_LCD_HSYNC__LCDIF_HSYNC 0x79
MX6UL_PAD_LCD_VSYNC__LCDIF_VSYNC 0x79
>;
};
pinctrl_pwm1: pwm1grp {
fsl,pins = <
MX6UL_PAD_GPIO1_IO08__PWM1_OUT 0x110b0
>;
};
pinctrl_lcdif_reset: lcdifresetgrp {
fsl,pins = <
MX6UL_PAD_LCD_RESET__GPIO3_IO04 0x1b0b0
>;
};
pinctrl_adc1: adc1grp {
fsl,pins = <
MX6UL_PAD_GPIO1_IO03__GPIO1_IO03 0x000010B1
MX6UL_PAD_GPIO1_IO04__GPIO1_IO04 0x000010B1
>;
};
};
};
&iomuxc_snvs {
pinctrl-names = "default_snvs";
pinctrl-0 = <&pinctrl_hog_2>;
imx6ul-evk {
pinctrl_hog_2: hoggrp-2 {
fsl,pins = <
MX6ULL_PAD_SNVS_TAMPER9__GPIO5_IO09 0x1b0b0 /* enet1 reset */
MX6ULL_PAD_SNVS_TAMPER6__GPIO5_IO06 0x1b0b0 /* enet2 reset */
MX6ULL_PAD_SNVS_TAMPER1__GPIO5_IO01 0x000110A0 /*key 1*/
>;
};
pinctrl_tsc_reset: tscresetgrp { /*!< Function assigned for the core: Cortex-A7[ca7] */
fsl,pins = <
MX6ULL_PAD_SNVS_TAMPER2__GPIO5_IO02 0x000110A0
>;
};
pinctrl_spi4: spi4grp {
fsl,pins = <
MX6ULL_PAD_BOOT_MODE0__GPIO5_IO10 0x70a1
MX6ULL_PAD_BOOT_MODE1__GPIO5_IO11 0x70a1
MX6ULL_PAD_SNVS_TAMPER7__GPIO5_IO07 0x70a1
MX6ULL_PAD_SNVS_TAMPER8__GPIO5_IO08 0x80000000
>;
};
pinctrl_leds: ledgrp {
fsl,pins = <
MX6ULL_PAD_SNVS_TAMPER3__GPIO5_IO03 0x000110A0
>;
};
pinctrl_485_ctl: uart3_rs485 {
fsl,pins = <
MX6ULL_PAD_SNVS_TAMPER0__GPIO5_IO00 0x1b0b0
>;
};
};
};
&lcdif {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_lcdif_dat
&pinctrl_lcdif_ctrl
&pinctrl_lcdif_reset>;
display = <&display0>;
status = "okay";
reset-gpios = <&gpio3 4 GPIO_ACTIVE_LOW>; /* 100ask */
display0: display {
bits-per-pixel = <24>;
bus-width = <24>;
display-timings {
native-mode = <&timing0>;
timing0: timing0_1024x768 {
clock-frequency = <50000000>;
hactive = <1024>;
vactive = <600>;
hfront-porch = <160>;
hback-porch = <140>;
hsync-len = <20>;
vback-porch = <20>;
vfront-porch = <12>;
vsync-len = <3>;
hsync-active = <0>;
vsync-active = <0>;
de-active = <1>;
pixelclk-active = <0>;
};
};
};
};
&pwm1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_pwm1>;
status = "okay";
};
&pxp {
status = "okay";
};
&ecspi3 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_ecspi3>;
cs-gpios = <&gpio1 20 GPIO_ACTIVE_LOW>;
status = "okay";
spidev: icm20608@0{
compatible = "invensense,icm20608";
interrupt-parent = <&gpio1>;
interrupts = <1 1>;
spi-max-frequency = <8000000>;
reg = <0>;
};
};
&sai2 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_sai2>;
assigned-clocks = <&clks IMX6UL_CLK_SAI2_SEL>,
<&clks IMX6UL_CLK_SAI2>;
assigned-clock-parents = <&clks IMX6UL_CLK_PLL4_AUDIO_DIV>;
assigned-clock-rates = <0>, <12288000>;
status = "okay";
};
&tsc {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_tsc>;
xnur-gpio = <&gpio1 3 GPIO_ACTIVE_LOW>;
measure-delay-time = <0xfffff>;
pre-charge-time = <0xffff>;
status = "okay";
};
&uart1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart1>;
status = "okay";
};
&uart3 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart3
&pinctrl_485_ctl>;
//pinctrl-0 = <&pinctrl_uart3>;
//fsl,rs485-gpio-txen = <&gpio5 0 GPIO_ACTIVE_HIGH>;
//rts-gpio = <&gpio5 0 GPIO_ACTIVE_HIGH>;
rs485-rts-active-high;
//rs485-rts-active-high;
rs485-rx-during-tx;
rs485-rts-delay = <100 100>;
linux,rs485-enabled-at-boot-time;
status = "okay";
};
&uart6 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart6>;
status = "okay";
};
&usbotg1 {
dr_mode = "otg";
srp-disable;
hnp-disable;
adp-disable;
status = "okay";
};
&usbotg2 {
dr_mode = "host";
disable-over-current;
status = "okay";
};
&usbphy1 {
tx-d-cal = <0x5>;
};
&usbphy2 {
tx-d-cal = <0x5>;
};
&usdhc1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_usdhc1>;
cd-gpios = <&gpio1 19 GPIO_ACTIVE_LOW>;
keep-power-in-suspend;
enable-sdio-wakeup;
bus-width = <4>;
status = "okay";
};
&usdhc2 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_usdhc2_8bit>;
bus-width = <8>;
non-removable;
status = "okay";
};
&wdog1 {
status = "okay";
};
&adc1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_adc1>;
num-channels = <5>;
vref-supply = <&reg_can_3v3>;
status = "okay";
};
&ecspi1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_ecspi1>;
fsl,spi-num-chipselects = <2>;
cs-gpios = <&gpio4 26 GPIO_ACTIVE_LOW>, <&gpio4 24 GPIO_ACTIVE_LOW>;
status = "okay";
/*
spidev0: spi@0 {
compatible = "rohm,dh2228fv";
reg = <0>;
spi-max-frequency = <5000000>;
};
spidev1: spi@1 {
compatible = "rohm,dh2228fv";
reg = <1>;
spi-max-frequency = <5000000>;
};
*/
};

View File

@@ -123,6 +123,15 @@ git clone https://e.coding.net/weidongshan/doc_and_source_for_drivers.git
* 2021.03.12 发布"I2C系统"13_使用GPIO模拟I2C的驱动程序分析 * 2021.03.12 发布"I2C系统"13_使用GPIO模拟I2C的驱动程序分析
* 2021.03.13 发布"I2C系统"
```shell
14_使用GPIO操作I2C设备_基于IMX6ULL
14_使用GPIO操作I2C设备_基于STM32MP157
```
## 6. 联系方式 ## 6. 联系方式

View File

@@ -0,0 +1,181 @@
## 使用GPIO操作I2C设备_STM32MP157
参考资料:
* i2c_spec.pdf
* Linux文档
* `Linux-5.4\Documentation\devicetree\bindings\i2c\i2c-gpio.yaml`
* `Linux-4.9.88\Documentation\devicetree\bindings\i2c\i2c-gpio.txt`
* Linux驱动源码
* `Linux-5.4\drivers\i2c\busses\i2c-gpio.c`
* `Linux-4.9.88\drivers\i2c\busses\i2c-gpio.c`
* 扩展板原理图:`100ASK_STM32MP157_Extend_Board.pdf`
* 本节对应的代码:
* `doc_and_source_for_drivers\STM32MP157\source\A7\04_I2C\07_i2c_gpio_dts_stm32mp157`
### 1. 硬件连接
* STM32MP157把I2C模块接到GPIO
![image-20210312182808093](pic/04_I2C/065_use_gpio_for_i2c_module_stm32mp157.png)
### 2. 根据原理图编写设备树
#### 2.1 原理图
![image-20210312185215667](pic/04_I2C/067_gpios_for_i2c_stm32mp157.png)
#### 2.2 编写设备树
```SHELL
i2c_gpio_100ask {
compatible = "i2c-gpio";
gpios = <&gpioa 13 0 /* sda */
&gpiod 8 0 /* scl */
>;
i2c-gpio,delay-us = <5>; /* ~100 kHz */
#address-cells = <1>;
#size-cells = <0>;
};
```
修改`arch/arm/boot/dts/stm32mp157c-100ask-512d-lcd-v1.dts`,在根节点下添加上述代码。
### 3. 确认内核已经配置了I2C-GPIO
查看内核目录下的`.config`,如果未设置`CONFIG_I2C_GPIO`上机实验时需要配置内核、编译I2C-GPIO驱动。
### 4. 上机实验
#### 4.1 设置工具链
* STM32MP157
```shell
export ARCH=arm
export CROSS_COMPILE=arm-buildroot-linux-gnueabihf-
export PATH=$PATH:/home/book/100ask_stm32mp157_pro-sdk/ToolChain/arm-buildroot-linux-gnueabihf_sdk-buildroot/bin
```
#### 4.2 编译、替换设备树
* 编译设备树:
在Ubuntu的STM32MP157内核目录下执行如下命令,
得到设备树文件:`arch/arm/boot/dts/stm32mp157c-100ask-512d-lcd-v1.dtb`
```shell
make dtbs
```
* 复制到NFS目录
```shell
$ cp arch/arm/boot/dts/stm32mp157c-100ask-512d-lcd-v1.dtb ~/nfs_rootfs/
```
* 开发板上挂载NFS文件系统
* vmware使用NAT(假设windowsIP为192.168.1.100)
```shell
[root@100ask:~]# mount -t nfs -o nolock,vers=3,port=2049,mountport=9999
192.168.1.100:/home/book/nfs_rootfs /mnt
```
* vmware使用桥接或者不使用vmware而是直接使用服务器假设Ubuntu IP为192.168.1.137
```shell
[root@100ask:~]# mount -t nfs -o nolock,vers=3 192.168.1.137:/home/book/nfs_rootfs /mnt
```
* 确定设备树分区挂载在哪里
由于版本变化STM32MP157单板上烧录的系统可能有细微差别。
在开发板上执行`cat /proc/mounts`后,可以得到两种结果(见下图)
* mmcblk2p2分区挂载在/boot目录下(下图左边):无需特殊操作,下面把文件复制到/boot目录即可
* mmcblk2p2挂载在/mnt目录下(下图右边)
* 在视频里、后面文档里,都是更新/boot目录下的文件所以要先执行以下命令重新挂载
* `mount /dev/mmcblk2p2 /boot`
![](pic/04_I2C/057_boot_mount.png)
* 更新设备树
```shell
[root@100ask:~]# cp /mnt/stm32mp157c-100ask-512d-lcd-v1.dtb /boot/
[root@100ask:~]# sync
```
* 重启开发板
#### 4.3 编译I2C-GPIO驱动
##### 1. 配置内核
在STM32MP157内核源码目录下执行`make menuconfig`命令,如下配置内核:
```shell
Device Drivers --->
I2C support --->
I2C Hardware Bus support --->
<M> GPIO-based bitbanging I2C // 输入M编译为模块
```
##### 2. 编译模块
设置工具链后,在内核目录下执行:
```shell
make modules // 得到 drivers/i2c/busses/i2c-gpio.ko
```
#### 5. 测试
在开发板上执行:
```shell
[root@100ask:~]# i2cdetect -l // 加载i2c-gpio.ko前只看到3条I2C BUS
i2c-1 i2c STM32F7 I2C(0x40013000) I2C adapter
i2c-2 i2c STM32F7 I2C(0x5c002000) I2C adapter
i2c-0 i2c STM32F7 I2C(0x40012000) I2C adapter
[root@100ask:~]#
[root@100ask:~]# insmod /mnt/i2c-gpio.ko
[ 113.686871] i2c_gpio: module verification failed: signature and/or required key missing - tainting kernel
[ 113.696497] gpio-13 (i2c_gpio_100ask): enforced open drain please flag it properly in DT/ACPI DSDT/board file
[ 113.706017] gpio-56 (i2c_gpio_100ask): enforced open drain please flag it properly in DT/ACPI DSDT/board file
[ 113.819836] i2c-gpio i2c_gpio_100ask: using lines 13 (SDA) and 56 (SCL)
[root@100ask:~]#
[root@100ask:~]# i2cdetect -l // 加载i2c-gpio.ko后看到4条I2C BUS
i2c-3 i2c i2c_gpio_100ask I2C adapter
i2c-1 i2c STM32F7 I2C(0x40013000) I2C adapter
i2c-2 i2c STM32F7 I2C(0x5c002000) I2C adapter
i2c-0 i2c STM32F7 I2C(0x40012000) I2C adapter
[root@100ask:~]#
[root@100ask:~]# i2cdetect -y 3 // 检测到0x50的设备
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: 50 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
[root@100ask:~]#
[root@100ask:~]# i2cset -f -y 3 0x50 0 0x55 // 往0地址写入0x55
[root@100ask:~]# i2cget -f -y 3 0x50 0 // 读0地址
0x55
```

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// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
/*
* Copyright (C) 100ASK 2020 - All Rights Reserved
* Author: 100ask
* support: weidongshan@qq.com
*/
/dts-v1/;
#include "stm32mp157c-100ask-512d-v1.dts"
/ {
model = "100ASK YA157C v2 www.100ask.com";
compatible = "st,stm32mp157c-100ask-512d-v1", "st,stm32mp157";
i2c-bus-virtual {
compatible = "100ask,i2c-bus-virtual";
};
i2c_gpio_100ask {
compatible = "i2c-gpio";
gpios = <&gpioa 13 0 /* sda */
&gpiod 8 0 /* scl */
>;
i2c-gpio,delay-us = <5>; /* ~100 kHz */
#address-cells = <1>;
#size-cells = <0>;
};
/*LCD Panel*/
panel {
compatible = "myir,070tft";
interrupts = <11 IRQ_TYPE_EDGE_FALLING>;
interrupt-parent = <&gpioe>;
pinctrl-names = "default", "sleep";
pinctrl-0 = <&ltdc_pins_a>;
pinctrl-1 = <&ltdc_pins_sleep_a>;
//reset-gpios = <&gpioe 12 GPIO_ACTIVE_LOW>;
backlight = <&panel_backlight>;
status = "okay";
port {
panel_in: endpoint {
remote-endpoint = <&ltdc_ep0_out>;
};
};
};
};
&spi5 {
pinctrl-names = "default", "sleep";
pinctrl-0 = <&spi5_pins_a>;
pinctrl-1 = <&spi5_sleep_pins_a>;
status = "okay";
cs-gpios = <&gpioh 5 GPIO_ACTIVE_LOW>;
spidev: icm20608@0{
compatible = "invensense,icm20608";
interrupts = <0 IRQ_TYPE_EDGE_FALLING>;
interrupt-parent = <&gpioz>;
spi-max-frequency = <8000000>;
reg = <0>;
};
};
/* test HDMI*/
&ltdc {
status = "okay";
port {
#address-cells = <1>;
#size-cells = <0>;
ltdc_ep1_out: endpoint@1 {
reg = <1>;
remote-endpoint = <&sii9022_in>;
};
};
};
&i2c1 {
ap3216c@1e {
compatible = "lite-on,ap3216c";
reg = <0x1e>;
};
};
/*HDMI*/
&i2c4 {
clock-frequency = <100000>;
hdmi-transmitter@40 { // use a dummy device
compatible = "sil,sii9022";
reg = <0x40>;
reset-gpios = <&gpiob 10 GPIO_ACTIVE_LOW>;
interrupts = <13 IRQ_TYPE_EDGE_FALLING>;
interrupt-parent = <&gpiob>;
//pinctrl-names = "default", "sleep";
//pinctrl-0 = <&ltdc_pins_a>;
//pinctrl-1 = <&ltdc_pins_sleep_a>;
status = "disabled";
ports {
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
sii9022_in: endpoint {
remote-endpoint = <&ltdc_ep1_out>;
};
};
};
};
#if 1
sii902x: sii902x@39 {
compatible = "SiI,sii902x";
reset-gpios = <&gpiob 10 GPIO_ACTIVE_LOW>;
//pinctrl-names = "default";
//pinctrl-0 = <&pinctrl_sii902x>;
interrupts = <13 IRQ_TYPE_EDGE_FALLING>;
interrupt-parent = <&gpiob>;
mode_str ="1280x720M@60";
bits-per-pixel = <16>;
reg = <0x39>;
status = "okay";
};
#endif
};
&i2s2 {
status = "disable";
};
/*test LCD*/
&ltdc {
status = "okay";
port {
#address-cells = <1>;
#size-cells = <0>;
ltdc_ep0_out: endpoint@0 {
reg = <0>;
remote-endpoint = <&panel_in>;
};
};
};

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<?xml version="1.0" encoding= "UTF-8" ?>
<configuration name="MCIMX6Y2xxx08" version="1.6" xsi:schemaLocation="http://mcuxpresso.nxp.com/XSD/mex_configuration_1.6 http://mcuxpresso.nxp.com/XSD/mex_configuration_1.6.xsd" uuid="dedf4814-e77e-4dcc-ab9d-16d5aeec6ca9" xmlns="http://mcuxpresso.nxp.com/XSD/mex_configuration_1.6" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<common>
<processor>MCIMX6Y2xxx08</processor>
<package>MCIMX6Y2CVM08</package>
<board></board>
<mcu_data>i_mx_2_0</mcu_data>
<cores selected="ca7">
<core name="Cortex-A7" id="ca7" description="A7 core"/>
</cores>
<description></description>
</common>
<preferences>
<validate_boot_init_only>true</validate_boot_init_only>
<generate_extended_information>false</generate_extended_information>
<generate_code_modified_registers_only>false</generate_code_modified_registers_only>
</preferences>
<tools>
<pins name="Pins" version="6.0" enabled="true" update_project_code="true">
<generated_project_files>
<file path="board/imx6ull-board.dtsi" update_enabled="true"/>
<file path="board/iomux_config.c" update_enabled="true"/>
<file path="board/iomux_config.h" update_enabled="true"/>
<file path="board/pin_mux.c" update_enabled="true"/>
<file path="board/pin_mux.h" update_enabled="true"/>
</generated_project_files>
<pins_profile>
<processor_version>6.0.1</processor_version>
<power_domains/>
</pins_profile>
<functions_list>
<function name="BOARD_InitPins">
<description>Configures pin routing and optionally pin electrical features.</description>
<options>
<callFromInitBoot>false</callFromInitBoot>
<coreID>ca7</coreID>
</options>
<dependencies/>
<pins>
<pin peripheral="GPIO4" signal="gpio_io, 20" pin_num="F3" pin_signal="CSI_HSYNC">
<pin_features>
<pin_feature name="PUS" value="no_init"/>
<pin_feature name="ODE" value="ENABLED"/>
</pin_features>
</pin>
<pin peripheral="GPIO4" signal="gpio_io, 21" pin_num="E4" pin_signal="CSI_DATA00">
<pin_features>
<pin_feature name="PUS" value="no_init"/>
<pin_feature name="ODE" value="ENABLED"/>
</pin_features>
</pin>
</pins>
</function>
</functions_list>
</pins>
</tools>
</configuration>

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/***********************************************************************************************************************
* This file was generated by the MCUXpresso Config Tools. Any manual edits made to this file
* will be overwritten if the respective MCUXpresso Config Tools is used to update this file.
**********************************************************************************************************************/
/*
* TEXT BELOW IS USED AS SETTING FOR TOOLS *************************************
!!GlobalInfo
product: Pins v6.0
processor: MCIMX6Y2xxx08
package_id: MCIMX6Y2CVM08
mcu_data: i_mx_2_0
processor_version: 6.0.1
* BE CAREFUL MODIFYING THIS COMMENT - IT IS YAML SETTINGS FOR TOOLS ***********
*/
/*
* TEXT BELOW IS USED AS SETTING FOR TOOLS *************************************
BOARD_InitPins:
- options: {callFromInitBoot: 'false', coreID: ca7}
- pin_list:
- {pin_num: F3, peripheral: GPIO4, signal: 'gpio_io, 20', pin_signal: CSI_HSYNC, PUS: no_init, ODE: ENABLED}
- {pin_num: E4, peripheral: GPIO4, signal: 'gpio_io, 21', pin_signal: CSI_DATA00, PUS: no_init, ODE: ENABLED}
* BE CAREFUL MODIFYING THIS COMMENT - IT IS YAML SETTINGS FOR TOOLS ***********
*/
/dts-v1/;
#include "skeleton.dtsi"
#include "imx6ull-pinfunc.h"
#include "imx6ull-pinfunc-snvs.h"
/ {
model = "NXP i.MX 6ULL User Board";
compatible = "fsl,imx6ull-board", "fsl,imx6ull";
soc {
#address-cells = <1>;
#size-cells = <1>;
iomuxc: iomuxc@020e0000 {
compatible = "fsl,imx6ull-iomuxc";
reg = <0x020e0000 0x4000>;
};
iomuxc_snvs: iomuxc-snvs@02290000 {
compatible = "fsl,imx6ull-iomuxc_snvs";
reg = <0x02290000 0x4000>;
};
};
};
&iomuxc {
pinctrl-names = "default";
pinctrl-0 = <&BOARD_InitPins>;
imx6ull-board {
BOARD_InitPins: BOARD_InitPinsGrp { /*!< Function assigned for the core: Cortex-A7[ca7] */
fsl,pins = <
MX6UL_PAD_CSI_DATA00__GPIO4_IO21 0x000018B0
MX6UL_PAD_CSI_HSYNC__GPIO4_IO20 0x000018B0
>;
};
};
};
&iomuxc_snvs {
pinctrl-names = "default_snvs";
imx6ull-board {
pinctrl-0 = <&BOARD_InitPinsSnvs>;
BOARD_InitPinsSnvs: BOARD_InitPinsSnvsGrp { /*!< Function assigned for the core: Cortex-A7[ca7] */
fsl,pins = <
>;
};
};
};

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/***********************************************************************************************************************
* This file was generated by the MCUXpresso Config Tools. Any manual edits made to this file
* will be overwritten if the respective MCUXpresso Config Tools is used to update this file.
**********************************************************************************************************************/
/*
* TEXT BELOW IS USED AS SETTING FOR TOOLS *************************************
!!GlobalInfo
product: Pins v6.0
processor: MCIMX6Y2xxx08
package_id: MCIMX6Y2CVM08
mcu_data: i_mx_2_0
processor_version: 6.0.1
* BE CAREFUL MODIFYING THIS COMMENT - IT IS YAML SETTINGS FOR TOOLS ***********
*/
#include "iomux_config.h"
/* FUNCTION ************************************************************************************************************
*
* Function Name : BOARD_InitBootPins
* Description : Calls initialization functions.
*
* END ****************************************************************************************************************/
void BOARD_InitBootPins(void)
{
}
/*
* TEXT BELOW IS USED AS SETTING FOR TOOLS *************************************
BOARD_InitPins:
- options: {callFromInitBoot: 'false', coreID: ca7}
- pin_list:
- {pin_num: F3, peripheral: GPIO4, signal: 'gpio_io, 20', pin_signal: CSI_HSYNC, PUS: no_init, ODE: ENABLED}
- {pin_num: E4, peripheral: GPIO4, signal: 'gpio_io, 21', pin_signal: CSI_DATA00, PUS: no_init, ODE: ENABLED}
* BE CAREFUL MODIFYING THIS COMMENT - IT IS YAML SETTINGS FOR TOOLS ***********
*/
/* FUNCTION ************************************************************************************************************
*
* Function Name : BOARD_InitPins
* Description : Configures pin routing and optionally pin electrical features.
*
* END ****************************************************************************************************************/
void BOARD_InitPins(void) { /*!< Function assigned for the core: Cortex-A7[ca7] */
/* IOMUXC_SW_MUX_CTL_PAD_CSI_DATA00 register modification value */
IOMUXC_BASE_PTR->SW_MUX_CTL_PAD[104U] = IOMUXC_SW_MUX_CTL_PAD_MUX_MODE(5U);
/* IOMUXC_SW_MUX_CTL_PAD_CSI_HSYNC register modification value */
IOMUXC_BASE_PTR->SW_MUX_CTL_PAD[103U] = IOMUXC_SW_MUX_CTL_PAD_MUX_MODE(5U);
/* IOMUXC_SW_PAD_CTL_PAD_CSI_DATA00 register modification value */
IOMUXC_BASE_PTR->SW_PAD_CTL_PAD[104] =
IOMUXC_SW_PAD_CTL_PAD_DSE(6U) |
IOMUXC_SW_PAD_CTL_PAD_SPEED(2U) |
IOMUXC_SW_PAD_CTL_PAD_ODE_MASK |
IOMUXC_SW_PAD_CTL_PAD_PKE_MASK;
/* IOMUXC_SW_PAD_CTL_PAD_CSI_HSYNC register modification value */
IOMUXC_BASE_PTR->SW_PAD_CTL_PAD[103] =
IOMUXC_SW_PAD_CTL_PAD_DSE(6U) |
IOMUXC_SW_PAD_CTL_PAD_SPEED(2U) |
IOMUXC_SW_PAD_CTL_PAD_ODE_MASK |
IOMUXC_SW_PAD_CTL_PAD_PKE_MASK;
}
/***********************************************************************************************************************
* EOF
**********************************************************************************************************************/

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/***********************************************************************************************************************
* This file was generated by the MCUXpresso Config Tools. Any manual edits made to this file
* will be overwritten if the respective MCUXpresso Config Tools is used to update this file.
**********************************************************************************************************************/
#ifndef _IOMUX_CONFIG_H_
#define _IOMUX_CONFIG_H_
#include "MCIMX6Y2.h"
/***********************************************************************************************************************
* Definitions
**********************************************************************************************************************/
/*!
* @addtogroup iomux_config
* @{
*/
/***********************************************************************************************************************
* API
**********************************************************************************************************************/
#if defined(__cplusplus)
extern "C" {
#endif
/*!
* @brief Calls initialization functions.
*
*/
void BOARD_InitBootPins(void);
/*!
* @brief Configures pin routing and optionally pin electrical features.
*
*/
void BOARD_InitPins(void); /*!< Function assigned for the core: Cortex-A7[ca7] */
#if defined(__cplusplus)
}
#endif
/*!
* @}
*/
#endif /* _IOMUX_CONFIG_H_ */
/***********************************************************************************************************************
* EOF
**********************************************************************************************************************/

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/***********************************************************************************************************************
* This file was generated by the MCUXpresso Config Tools. Any manual edits made to this file
* will be overwritten if the respective MCUXpresso Config Tools is used to update this file.
**********************************************************************************************************************/
/*
* TEXT BELOW IS USED AS SETTING FOR TOOLS *************************************
!!GlobalInfo
product: Pins v6.0
processor: MCIMX6Y2xxx08
package_id: MCIMX6Y2CVM08
mcu_data: i_mx_2_0
processor_version: 6.0.1
* BE CAREFUL MODIFYING THIS COMMENT - IT IS YAML SETTINGS FOR TOOLS ***********
*/
#include "fsl_common.h"
#include "fsl_iomuxc.h"
#include "pin_mux.h"
/***********************************************************************************************************************
* Code
**********************************************************************************************************************/
/*
* TEXT BELOW IS USED AS SETTING FOR TOOLS *************************************
BOARD_InitPins:
- options: {callFromInitBoot: 'false', coreID: ca7}
- pin_list:
- {pin_num: F3, peripheral: GPIO4, signal: 'gpio_io, 20', pin_signal: CSI_HSYNC, PUS: no_init, ODE: ENABLED}
- {pin_num: E4, peripheral: GPIO4, signal: 'gpio_io, 21', pin_signal: CSI_DATA00, PUS: no_init, ODE: ENABLED}
* BE CAREFUL MODIFYING THIS COMMENT - IT IS YAML SETTINGS FOR TOOLS ***********
*/
/* FUNCTION ************************************************************************************************************
*
* Function Name : BOARD_InitPins
* Description : Configures pin routing and optionally pin electrical features.
*
* END ****************************************************************************************************************/
void BOARD_InitPins(void) { /*!< Function assigned for the core: Cortex-A7[ca7] */
IOMUXC_SetPinMux(IOMUXC_CSI_DATA00_GPIO4_IO21, 0U);
IOMUXC_SetPinConfig(IOMUXC_CSI_DATA00_GPIO4_IO21,
IOMUXC_SW_PAD_CTL_PAD_DSE(6U) |
IOMUXC_SW_PAD_CTL_PAD_SPEED(2U) |
IOMUXC_SW_PAD_CTL_PAD_ODE_MASK |
IOMUXC_SW_PAD_CTL_PAD_PKE_MASK);
IOMUXC_SetPinMux(IOMUXC_CSI_HSYNC_GPIO4_IO20, 0U);
IOMUXC_SetPinConfig(IOMUXC_CSI_HSYNC_GPIO4_IO20,
IOMUXC_SW_PAD_CTL_PAD_DSE(6U) |
IOMUXC_SW_PAD_CTL_PAD_SPEED(2U) |
IOMUXC_SW_PAD_CTL_PAD_ODE_MASK |
IOMUXC_SW_PAD_CTL_PAD_PKE_MASK);
}
/***********************************************************************************************************************
* EOF
**********************************************************************************************************************/

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/***********************************************************************************************************************
* This file was generated by the MCUXpresso Config Tools. Any manual edits made to this file
* will be overwritten if the respective MCUXpresso Config Tools is used to update this file.
**********************************************************************************************************************/
#ifndef _PIN_MUX_H_
#define _PIN_MUX_H_
#include "board.h"
#if defined(__cplusplus)
extern "C" {
#endif
/*!
* @brief Configures pin routing and optionally pin electrical features.
*
*/
void BOARD_InitPins(void);
#if defined(__cplusplus)
}
#endif
#endif /* _PIN_MUX_H_ */

15
工具/imx/说明.txt Normal file
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Pins_Tool_for_i.MX_Processors_v6_x64.exe 文件太大了,
无法上传到GIT。
可以去百度网盘下载,
方法如下:
1. 打开 download.100ask.net
2. 找到"100ASK_IMX6ULL_PRO开发板", 它里面开发板配套资料的百度网盘的下载链接
3. 下载网盘资料后,点击进入目录: "01_Tools (工具)/IMX_pinsTools"
4. 里面有2个文件:
Pins_Tool_for_i.MX_Processors_v6_x64.exe
MCIMX6Y2xxx08.mex
5. 把它们转存到你自己的网盘, 再用百度网盘软件下载。
建议不要用浏览器直接下载, 容易出错。