From dc2e38ec7f2836115bcf710b40937eb4b1b46b36 Mon Sep 17 00:00:00 2001
From: gaoyang3513 <gaoyang3513@163.com>
Date: Sat, 27 Jan 2024 15:27:10 +0000
Subject: [PATCH] =?UTF-8?q?[Add]=20=E6=96=B0=E5=A2=9EI2C=E9=A9=B1=E5=8A=A8?=
 =?UTF-8?q?=E7=9B=AE=E5=BD=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .gitignore          | 11 +++++----
 02-I2C/Makefile     | 54 +++++++++++++++++++++++++++++++++++++++++++++
 02-I2C/ReadMe.md    | 28 +++++++++++++++++++++++
 02-I2C/i2c_static.c | 39 ++++++++++++++++++++++++++++++++
 Makefile            |  3 ++-
 5 files changed, 130 insertions(+), 5 deletions(-)
 create mode 100644 02-I2C/Makefile
 create mode 100644 02-I2C/ReadMe.md
 create mode 100755 02-I2C/i2c_static.c

diff --git a/.gitignore b/.gitignore
index 0968eac45..55f02db7d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,14 +1,17 @@
-
+# Files
 *.o
-*.mod
-
+*.ko
 *.cmd
+*.mod
+*.mod.c
+*.mod.o
 
 Module.symvers
 modules.order
 compile_commands.json
 
+# Directories
 .cache/
-
 output/
 _install/
+.tmp_versions/
diff --git a/02-I2C/Makefile b/02-I2C/Makefile
new file mode 100644
index 000000000..1cbdd8ecc
--- /dev/null
+++ b/02-I2C/Makefile
@@ -0,0 +1,54 @@
+# All Right Reserved.
+# Author       : gaoyang3513@outlook.com
+# Version      : V1.0.0  202x.01.01
+# Description  :
+# Note         :
+
+# ---------------------------------------------------------------------------
+# Path information
+LOCAL_DIR   := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
+
+# Subdirectory
+
+# Output directories
+OUTPUT_DIR  ?= $(LOCAL_DIR)/output
+INSTALL_DIR ?= $(LOCAL_DIR)/_install
+
+# ---------------------------------------------------------------------------
+# Variables
+MULTI_CORES ?= $(shell grep -c ^processor /proc/cpuinfo)
+
+# ---------------------------------------------------------------------------
+# Compile configure
+
+# ---------------------------------------------------------------------------
+# Source and oject files
+ifneq ($(KERNELRELEASE),)
+
+obj-m := i2c_static.o
+
+# ---------------------------------------------------------------------------
+# Targets
+else # KERNELRELEASE
+
+ifneq ($(filter $(BOARD),mikv-Duo),)
+KERNELDIR := ${HOME}/Source/10-CV1800/01-MilkDuo/02-Project/SDK_CV1800_BR2/linux_5.10/build/cv1800b_milkv_duo_sd
+ROOTFS    := ${HOME}/nfs/rootfs
+else
+KERNELDIR ?= /lib/modules/$(shell uname -r)/build
+endif
+
+.PHONY:  all clean init
+
+all:
+	@$(MAKE) -C $(KERNELDIR) M=$(LOCAL_DIR) modules -j$(MULTI_CORES);
+
+install:
+	@$(MAKE) -C $(KERNELDIR) M=$(LOCAL_DIR) modules_install INSTALL_MOD_PATH=$(INSTALL_DIR)
+
+clean:
+	@rm -rf *.o *.ko .*.cmd *.mod* modules.order Module.symvers .tmp_versions
+	@if [ -d $(LOCAL_DIR)/output   ]; then rm -rf $(LOCAL_DIR)/output;   fi;
+	@if [ -d $(LOCAL_DIR)/_install ]; then rm -rf $(LOCAL_DIR)/_install; fi;
+
+endif # KERNELRELEASE
diff --git a/02-I2C/ReadMe.md b/02-I2C/ReadMe.md
new file mode 100644
index 000000000..9a2b73385
--- /dev/null
+++ b/02-I2C/ReadMe.md
@@ -0,0 +1,28 @@
+
+
+## 调试命令
+
+
+```shell
+# ~/.bash_aliases
+# alias source_env_MilkV-Duo='export BOARD=mikv-Duo; export ARCH=riscv; export CROSS_COMPILE=riscv64-unknown-linux-gnu-'
+
+source_env_MilkV-Duo
+```
+
+```shell
+scp gaoyang3513@192.168.3.120:Source/12-Demo/Linux_Drivers/02-I2C/i2c_static.ko ./
+
+```
+
+```shell
+# cat /proc/devices
+Character devices:
+...
+256 GBox
+```
+
+```shell
+mknod -m 0755 /dev/GBox c 256 0
+```
+
diff --git a/02-I2C/i2c_static.c b/02-I2C/i2c_static.c
new file mode 100755
index 000000000..7c9f9b0f8
--- /dev/null
+++ b/02-I2C/i2c_static.c
@@ -0,0 +1,39 @@
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include <linux/fs.h>
+
+#define VSER_MAJOR	256
+#define VSER_MINOR	0
+#define VSER_DEV_CNT	1
+#define VSER_DEV_NAME	"GBox"
+
+static int __init vser_init(void)
+{
+	int ret;
+	dev_t dev;
+
+	dev = MKDEV(VSER_MAJOR, VSER_MINOR);
+	ret = register_chrdev_region(dev, VSER_DEV_CNT, VSER_DEV_NAME);
+	if (ret)
+		goto reg_err;
+	return 0;
+
+reg_err:
+	return ret;
+}
+
+static void __exit vser_exit(void)
+{
+	dev_t dev;
+
+	dev = MKDEV(VSER_MAJOR, VSER_MINOR);
+	unregister_chrdev_region(dev, VSER_DEV_CNT);
+}
+
+module_init(vser_init);
+module_exit(vser_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("gaoyang3513 <gaoyang3513@163.com>");
diff --git a/Makefile b/Makefile
index 76f921778..c2aa373c4 100644
--- a/Makefile
+++ b/Makefile
@@ -19,7 +19,8 @@ INSTALL_DIR ?= $(LOCAL_DIR)/_install
 # Variables
 MULTI_CORES ?= $(shell grep -c ^processor /proc/cpuinfo)
 
-SUB_DIRS := 01-Char/
+SUB_DIRS := 01-Char/ \
+	    02-I2C/
 
 # ---------------------------------------------------------------------------
 # Compile configure