07打开r40m平台Android6.0下验证SPI0（分色排版）
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打开r40m平台Android6.0下验证SPI0
2017/10/27 17:38
版本：V1.0
开发板使用：CB-S（不用修改任何配置文件！）
1、原始编译r40m的Anroid6.0：
rootroot@cm-System-Product-Name:/home/wwt/r40/ap6212a0a1_r40m$ tar zxvf android_r40m_20170424_repack.tar.gz
rootroot@cm-System-Product-Name:/home/wwt/r40/ap6212a0a1_r40m$ tar zxvf lichee_r40m_20170424_repack.tar.gz
rootroot@cm-System-Product-Name:/home/wwt/r40/ap6212a0a1_r40m$ cd lichee
rootroot@cm-System-Product-Name:/home/wwt/r40/ap6212a0a1_r40m/lichee$ ./build.sh config
1. sun8iw11p1
Choice: 1
All available platforms:
0. android
Choice: 0
All available kernel:
0. linux-3.10
Choice: 0
All available boards:
1. m2ultra
Choice: 1
rootroot@cm-System-Product-Name:/home/wwt/r40/ap6212a0a1_r40m/lichee$ ./build.sh
rootroot@cm-System-Product-Name:/home/wwt/r40/ap6212a0a1_r40m/lichee$ cd ../android/
rootroot@cm-System-Product-Name:/home/wwt/r40/ap6212a0a1_r40m/android$ source build/envsetup.sh
rootroot@cm-System-Product-Name:/home/wwt/r40/ap6212a0a1_r40m/android$ lunch
20. azalea_m2ultra-eng
Which would you like? [aosp_arm-eng] 20
rootroot@cm-System-Product-Name:/home/wwt/r40/ap6212a0a1_r40m/android$ extract-bsp
rootroot@cm-System-Product-Name:/home/wwt/r40/ap6212a0a1_r40m/android$ make -j12
rootroot@cm-System-Product-Name:/home/wwt/r40/ap6212a0a1_r40m/android$ pack
2、
确定driver的name为spidev：
W:\r40-android-6.0\lichee\linux-3.10\drivers\spi\spidev.c
static struct spi_driver spidev_spi_driver = {
.driver = {
.name ="spidev",
.owner =THIS_MODULE,
.of_match_table = of_match_ptr(spidev_dt_ids),
},
.probe =spidev_probe,
.remove =spidev_remove,
/* NOTE: suspend/resume methods are not necessary here.
* We don't do anything except pass the requests to/from
* the underlying controller. The refrigerator handles
* most issues; the controller driver handles the rest.
*/
};
3、
W:\r40-android-6.0\lichee\tools\pack\chips\sun8iw11p1\configs\m2ultra\sys_config.fex
;----------------------------------------------------------------------------------
;SPI controller configuration
;----------------------------------------------------------------------------------
[spi0]
spi0_used = 0
spi0_cs_number = 2
spi0_cs_bitmap = 3
spi0_cs0 = port:PC23<3><1><default><default>
spi0_cs1 = port:PI14<2><1><default><default>
spi0_sclk = port:PC2<3><default><default><default>
spi0_mosi = port:PC0<3><default><default><default>
spi0_miso = port:PC1<3><default><default><default>
修改为：
;----------------------------------------------------------------------------------
;SPI controller configuration
;----------------------------------------------------------------------------------
;spi0有接SPI器件（和PC引脚和NAND冲突），但是空贴！
[spi0]
spi0_used = 1
spi0_cs_number = 2
spi0_cs_bitmap = 3
spi0_cs0 = port:PC23<3><1><default><default>
spi0_cs1 = port:PI14<2><1><default><default>
spi0_sclk = port:PC2<3><default><default><default>
spi0_mosi = port:PC0<3><default><default><default>
spi0_miso = port:PC1<3><default><default><default>
;----------------------------------------------------------------------------------
;SPI device configuration
;compatible --- device name
;spi-max-frequency --- work frequency
;reg --- chip select
;optional properties: spi-cpha, spi-cpol, spi-cs-high
;----------------------------------------------------------------------------------
;[spi0/spi_board0]
;compatible =
;spi-max-frequency =
;reg =
;spi-cpha
;spi-cpol
;spi-cs-high
[spi0/spi_board0]
compatible = "spidev"
spi-max-frequency = 50000000
reg = 1
;spi-cpha = 0
;spi-cpol = 0
;spi-cs-high = 0
4、在内核中打开SPI（生成设备节点/dev/spidev0.1）：
rootroot@cm-System-Product-Name:/home/wwt/r40-android-6.0/android$ cd ../lichee/
rootroot@cm-System-Product-Name:/home/wwt/r40-android-6.0/lichee$ ll
总用量 44
drwxrwxr-x 8 rootroot rootroot 4096 10月 27 17:25 ./
drwxrwxr-x 4 rootroot rootroot 4096 10月 24 09:45 ../
drwxrwxr-x 12 rootroot rootroot 4096 10月 24 09:47 brandy/
-rw-rw-r-- 1 rootroot rootroot 123 10月 27 17:25 .buildconfig
drwxrwxr-x 15 rootroot rootroot 4096 10月 24 09:47 buildroot/
-r-xr-xr-x 1 rootroot rootroot 55 10月 24 09:47 build.sh*
drwxrwxr-x 29 rootroot rootroot 4096 10月 27 17:26 linux-3.10/
drwxrwxr-x 3 rootroot rootroot 4096 10月 24 11:53 out/
-r--r--r-- 1 rootroot rootroot 232 10月 24 09:47 README
drwxrwxr-x 6 rootroot rootroot 4096 10月 24 09:47 .repo/
drwxrwxr-x 7 rootroot rootroot 4096 10月 27 17:25 tools/
rootroot@cm-System-Product-Name:/home/wwt/r40-android-6.0/lichee$
rootroot@cm-System-Product-Name:/home/wwt/r40-android-6.0/lichee$ cd linux-3.10/
rootroot@cm-System-Product-Name:/home/wwt/r40-android-6.0/lichee/linux-3.10$ make ARCH-arm menuconfig
Device Drivers --->
[*] SPI support --->
< > User mode SPI device driver support
修改为：
<*> User mode SPI device driver support
rootroot@cm-System-Product-Name:/home/wwt/r40-android-6.0/lichee$ ./build.sh
rootroot@cm-System-Product-Name:/home/wwt/r40-android-6.0/lichee$ cd ../android/
rootroot@cm-System-Product-Name:/home/wwt/r40-android-6.0/android$ source build/envsetup.sh
rootroot@cm-System-Product-Name:/home/wwt/r40-android-6.0/android$ lunch
20. azalea_m2ultra-eng
Which would you like? [aosp_arm-eng] 20
rootroot@cm-System-Product-Name:/home/wwt/r40-android-6.0/android$ extract-bsp
rootroot@cm-System-Product-Name:/home/wwt/r40-android-6.0/android$ make -j12
rootroot@cm-System-Product-Name:/home/wwt/r40-android-6.0/android$ pack
刷机之后查找设备节点：/dev/spidev0.1
shell@azalea-m2ultra:/ $
shell@azalea-m2ultra:/ $ su
root@azalea-m2ultra:/ #
root@azalea-m2ultra:/ # find . -name spi*
./sys/bus/spi
./sys/bus/spi/devices/spi0.1
./sys/bus/spi/drivers/spidev
./sys/bus/spi/drivers/spidev/spi0.1
./sys/bus/platform/devices/spi0
./sys/bus/platform/drivers/spi
./sys/bus/platform/drivers/spi/spi0
./sys/devices/soc/spi0
./sys/devices/soc/spi0/spi_master
./sys/devices/soc/spi0/spi_master/spi0
./sys/devices/soc/spi0/spi_master/spi0/spi0.1
./sys/devices/soc/spi0/spi_master/spi0/spi0.1/spidev
./sys/devices/soc/spi0/spi_master/spi0/spi0.1/spidev/spidev0.1
./sys/class/spi_master
./sys/class/spi_master/spi0
./sys/class/spidev
./sys/class/spidev/spidev0.1
./sys/kernel/debug/clk/hosc/pll_periph0/spi0
./sys/kernel/debug/clk/hosc/spi1
./sys/kernel/debug/clk/hosc/spi2
./sys/kernel/debug/clk/hosc/spi3
./sys/module/spidev
./sbin/spidev_test0
./proc/irq/42/spi0
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./dev/spidev0.1
1|root@azalea-m2ultra:/ #
1|root@azalea-m2ultra:/ #
5、增加SPI的测试验证程序（spidev_test.c）：
rootroot@cm-System-Product-Name:/home/wwt/r40-android-6.0/lichee/linux-3.10$ find . -name spidev_test.c
./Documentation/spi/spidev_test.c
rootroot@cm-System-Product-Name:/home/wwt/r40-android-6.0/lichee/linux-3.10$
请严重注意：测试应用程序的名字不能叫：spidev_test。感觉是tinav2.1的SDK自动过滤掉了spidev_test这个应用程序名！
（Android6.0下还是和tinav2.1下取同一个名字得了！）
不过叫spidev_test0还是可以的！^_
W:\r40-android-6.0\android\external\spidev_test0\Android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
#LOCAL_C_INCLUDES += \
#frameworks/av/media/CedarX-Projects/CedarX/include/include_camera
#
#LOCAL_SHARED_LIBRARIES += \
#libsunxi_alloc \
#
#LOCAL_MODULE_TAGS := optional
LOCAL_MODULE = spidev_test0
LOCAL_MODULE_PATH := $(TARGET_ROOT_OUT_SBIN)
# LOCAL_SRC_FILES := $(call all-subdir-c-files)
LOCAL_SRC_FILES := spidev_test0.c
include $(BUILD_EXECUTABLE)
W:\r40-android-6.0\android\external\spidev_test0\spidev_test0.c
（spidev_test0.c这个就是lichee/linux-3.4/Documentation/spi/spidev_test.c，不过需要根据实际修改设备节点！）
默认为：static const char *device = "/dev/spidev1.1";
请改为：static const char *device = "/dev/spidev0.1";
W:\r40-android-6.0\android\external\spidev_test0\spidev_test0.c
//static const char *device = "/dev/spidev0.0";
static const char *device = "/dev/spidev0.1";
static uint8_t mode;
static uint8_t bits = 8;
static uint32_t speed = 500000;
static uint16_t delay;
static void transfer(int fd)
{
int ret;
//uint8_t tx[] = {
//0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
//0x40, 0x00, 0x00, 0x00, 0x00, 0x95,
//0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
//0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
//0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
//0xDE, 0xAD, 0xBE, 0xEF, 0xBA, 0xAD,
//0xF0, 0x0D,
//};
// CityBrand WelCome U!
uint8_t tx[] = {
0x43, 0x69, 0x74, 0x79, 0x42, 0x72, 0x61, 0x6E, 0x64, 0x20,
0x57, 0x65, 0x6C, 0x43, 0x6F, 0x6D, 0x65, 0x20, 0x55, 0x21,
0x43, 0x69, 0x74, 0x79, 0x42, 0x72, 0x61, 0x6E, 0x64, 0x20,
0x57, 0x65, 0x6C, 0x43, 0x6F, 0x6D, 0x65, 0x20, 0x55, 0x21,
0x43, 0x69, 0x74, 0x79, 0x42, 0x72, 0x61, 0x6E, 0x64, 0x20,
0x57, 0x65, 0x6C, 0x43, 0x6F, 0x6D, 0x65, 0x20, 0x55, 0x21,
};
uint8_t rx[ARRAY_SIZE(tx)] = {0, };
struct spi_ioc_transfer tr = {
.tx_buf = (unsigned long)tx,
.rx_buf = (unsigned long)rx,
.len = ARRAY_SIZE(tx),
.delay_usecs = delay,
.speed_hz = speed,
.bits_per_word = bits,
};
ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
if (ret < 1)
pabort("can't send spi message");
for (ret = 0; ret < ARRAY_SIZE(tx); ret++) {
//if (!(ret % 6))
//puts(" ");
//printf("%.2X ", rx[ret]);
if (!(ret % 20)){
puts("\n");
}
printf("%c", rx[ret]);
}
//puts("");
puts("\n");
}
W:\r40\ov5640_ap6212a0a1_r40m\android\build\target\product\base.mk
#
# Copyright (C) 2012 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# Base modules (will move elsewhere, previously user tagged)
PRODUCT_PACKAGES += \
20-dns.conf \
95-configured \
org.apache.http.legacy.boot \
appwidget \
appops \
am \
android.policy \
android.test.runner \
app_process \
applypatch \
blkid \
bmgr \
bugreport \
content \
dhcpcd \
dhcpcd-run-hooks \
dnsmasq \
dpm \
framework \
fsck_msdos \
hid \
ime \
input \
javax.obex \
libandroid \
libandroid_runtime \
libandroid_servers \
libaudioeffect_jni \
libaudioflinger \
libaudiopolicyservice \
libaudiopolicymanager \
libbundlewrapper \
libcamera_client \
libcameraservice \
libdl \
libdrmclearkeyplugin \
libeffectproxy \
libeffects \
libinput \
libinputflinger \
libiprouteutil \
libjnigraphics \
libldnhncr \
libmedia \
libmedia_jni \
libmediaplayerservice \
libmtp \
libnetd_client \
libnetlink \
libnetutils \
libpdfium \
libradio \
libradioservice \
libradio_metadata \
libreference-ril \
libreverbwrapper \
libril \
librtp_jni \
libsensorservice \
libskia \
libsonic \
libsonivox \
libsoundpool \
libsoundtrigger \
libsoundtriggerservice \
libsqlite \
libstagefright \
libstagefright_amrnb_common \
libstagefright_avc_common \
libstagefright_enc_common \
libstagefright_foundation \
libstagefright_omx \
libstagefright_yuv \
libusbhost \
libutils \
libvisualizer \
libvorbisidec \
libmediandk \
libwifi-service \
media \
media_cmd \
mediaserver \
monkey \
mtpd \
ndc \
netd \
ping \
ping6 \
platform.xml \
pppd \
pm \
racoon \
run-as \
schedtest \
sdcard \
secdiscard \
services \
settings \
sgdisk \
sm \
svc \
tc \
telecom \
vdc \
vold \
rebird \
fpscamera \
ll \
spidev_test0 \
wm
PRODUCT_COPY_FILES := $(call add-to-product-copy-files-if-exists,\
frameworks/base/preloaded-classes:system/etc/preloaded-classes)
# Note: it is acceptable to not have a compiled-classes file. In that case, all boot classpath
# classes will be compiled.
PRODUCT_COPY_FILES += $(call add-to-product-copy-files-if-exists,\
frameworks/base/compiled-classes:system/etc/compiled-classes)
$(call inherit-product, $(SRC_TARGET_DIR)/product/embedded.mk)
rootroot@cm-System-Product-Name:/home/wwt/r40-android-6.0/android/external/spidev_test0$
rootroot@cm-System-Product-Name:/home/wwt/r40-android-6.0/android/external/spidev_test0$ll
总用量 52
drwx------ 2 rootroot rootroot 4096 10月 27 14:31 ./
drwxrwxr-x 204 rootroot rootroot 4096 10月 27 17:23 ../
-rwx------ 1 rootroot rootroot 443 10月 26 12:58 Android.mk*
-rwx------ 1 rootroot rootroot 382 3月 3 2017 Android - 副本.mk*
-rwx------ 1 rootroot rootroot 24979 3月 3 2017 fpscamera.c*
-rwx------ 1 rootroot rootroot 5004 10月 27 17:56 spidev_test0.c*
rootroot@cm-System-Product-Name:/home/wwt/r40-android-6.0/android/external/spidev_test0$
rootroot@cm-System-Product-Name:/home/wwt/r40-android-6.0/android/external/spidev_test0$
rootroot@cm-System-Product-Name:/home/wwt/r40-android-6.0/android/external/spidev_test0$mm
============================================
PLATFORM_VERSION_CODENAME=REL
PLATFORM_VERSION=6.0.1
TARGET_PRODUCT=azalea_m2ultra
TARGET_BUILD_VARIANT=eng
TARGET_BUILD_TYPE=release
TARGET_BUILD_APPS=
TARGET_ARCH=arm
TARGET_ARCH_VARIANT=armv7-a-neon
TARGET_CPU_VARIANT=cortex-a7
TARGET_2ND_ARCH=
TARGET_2ND_ARCH_VARIANT=
TARGET_2ND_CPU_VARIANT=
HOST_ARCH=x86_64
HOST_OS=linux
HOST_OS_EXTRA=Linux-3.13.0-24-generic-x86_64-with-Ubuntu-14.04-trusty
HOST_BUILD_TYPE=release
BUILD_ID=MOB30R
OUT_DIR=out
============================================
No private recovery resources for TARGET_DEVICE azalea-m2ultra
make:进入目录'/home/wwt/r40-android-6.0/android'
target thumb C: spidev_test0 <= external/spidev_test0/spidev_test0.c
external/spidev_test0/spidev_test0.c: In function 'transfer':
external/spidev_test0/spidev_test0.c:77:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (ret = 0; ret < ARRAY_SIZE(tx); ret++) {
^
target Executable: spidev_test0 (out/target/product/azalea-m2ultra/obj/EXECUTABLES/spidev_test0_intermediates/LINKED/spidev_test0)
target Unpacked: spidev_test0 (out/target/product/azalea-m2ultra/obj/EXECUTABLES/spidev_test0_intermediates/PACKED/spidev_test0)
target Symbolic: spidev_test0 (out/target/product/azalea-m2ultra/symbols/root/sbin/spidev_test0)
target Strip: spidev_test0 (out/target/product/azalea-m2ultra/obj/EXECUTABLES/spidev_test0_intermediates/spidev_test0)
Install: out/target/product/azalea-m2ultra/root/sbin/spidev_test0
make:离开目录“/home/wwt/r40-android-6.0/android”
#### make completed successfully (1 seconds) ####
rootroot@cm-System-Product-Name:/home/wwt/r40-android-6.0/android/external/spidev_test0$
rootroot@cm-System-Product-Name:/home/wwt/r40-android-6.0/android/external/spidev_test0$
开发板：BPI-M2U。
请将开发板上的CON1引脚上的第19脚（SPI0-MOSI）和第21脚（SPI0-MISO）通过1k欧姆的电阻连接在一起！（不建议直连，阻值可以根据实际情况灵活决定！）
1|root@azalea-m2ultra:/ #
1|root@azalea-m2ultra:/ #
1|root@azalea-m2ultra:/ # spidev_test0
spi mode: 0
bits per word: 8
max speed: 500000 Hz (500 KHz)
CityBrand WelCome U!
CityBrand WelCome U!
CityBrand WelCome U!
root@azalea-m2ultra:/ #
root@azalea-m2ultra:/ #
（验证通过！）
参考资料：
http://www.xuebuyuan.com/1345420.html
Linux2.6.32下SPI驱动的移植如下图所示：
http://blog.sina.com.cn/s/blog_6182b82201011s6j.html
基于S3C2440的Linux SPI驱动移植笔记
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