501在全志r16平台tinav3.0系统下调通pwm1的10KHZ波形

2018/10/19 19:52

版本：V1.0

开发板：SC3817R

SDK：tina v3.0

1、01原始编译全志r16平台tinav3.0系统：

rootroot@cm88:~$ cd /home/wwt

rootroot@cm88:/home/wwt$

rootroot@cm88:~$ cd /home/wwt

rootroot@cm88:/home/wwt$

rootroot@cm88:/home/wwt$ md5sum tina_v3.0_20180606_1711git.tar.gz

ebf7ea460473f13a7f64248ed61cf998 tina_v3.0_20180606_1711git.tar.gz

rootroot@cm88:/home/wwt$

rootroot@cm88:/home/wwt$ tar zxvf tina_v3.0_20180606_1711git.tar.gz

rootroot@cm88:/home/wwt$

rootroot@cm88:/home/wwt$ cd tina_v3.0/

rootroot@cm88:/home/wwt/tina_v3.0$

rootroot@cm88:/home/wwt/tina_v3.0$ source build/envsetup.sh

（请严重注意：lunch之后的选项是环境依赖的，请选择astar_parrot-tina前的实际数值！）

rootroot@cm88:/home/wwt/tina_v3.0$ lunch

You're building on Linux

Lunch menu... pick a combo:

5. astar_parrot-tina

Which would you like?5

rootroot@cm88:/home/wwt/tina_v3.0$ make -j12

rootroot@cm88:/home/wwt/tina_v3.0$ pack -d

2、在内核中打开PWM：

（已经默认选中了）

rootroot@cm88:/home/wwt/tina_v3.0$ make kernel_menuconfig

Device Drivers --->

[*] Pulse-Width Modulation (PWM) Support --->

--- Pulse-Width Modulation (PWM) Support

<*> sunxi pwm support

相关驱动文件在这里：

W:\tina_v3.0\lichee\linux-3.4\drivers\pwm\core.c

W:\tina_v3.0\lichee\linux-3.4\drivers\pwm\pwm-sunxi.c

刷机之后可见，没有输出PWM波形的驱动！

root@TinaLinux:/#

root@TinaLinux:/# find . -name pwm*

./sys/kernel/debug/pwm

root@TinaLinux:/#

root@TinaLinux:/sys/kernel/debug#

root@TinaLinux:/sys/kernel/debug# ll

drwxr-xr-x 24 root root 0 Jan 1 08:00 .

drwxr-xr-x 9 root root 0 Jan 1 08:29 ..

drwxr-xr-x 3 root root 0 Jan 1 08:00 asoc

drwxr-xr-x 2 root root 0 Jan 1 08:29 axpdbg

drwxr-xr-x 16 root root 0 Jan 1 08:00 bdi

drwxr-xr-x 2 root root 0 Jan 1 08:00 bluetooth

drwxr-xr-x 2 root root 0 Jan 1 08:29 ccudbg

drwxr-xr-x 6 root root 0 Jan 1 08:29 clk

drwxr-xr-x 2 root root 0 Jan 1 08:29 cpufreq

drwxr-xr-x 2 root root 0 Jan 1 08:29 ddrfreq

drwxr-xr-x 2 root root 0 Jan 1 08:00 extfrag

-r--r--r-- 1 root root 0 Jan 1 08:00 gpio

drwxr-xr-x 2 root root 0 Jan 1 08:00 hid

drwxr-xr-x 2 root root 0 Jan 1 08:00 hotplug

drwxr-xr-x 2 root root 0 Jan 1 08:00 ieee80211

drwxr-xr-x 2 root root 0 Jan 1 08:00 ion

drwxr-xr-x 8 root root 0 Jan 1 08:29 mali

drwxr-xr-x 2 root root 0 Jan 1 08:00 memblock

drwxr-xr-x 2 root root 0 Jan 1 08:00 mmc0

drwxr-xr-x 4 root root 0 Jan 1 08:00 pinctrl

-r--r--r-- 1 root root 0 Jan 1 08:00 pwm

drwxr-xr-x 2 root root 0 Jan 1 08:00 regmap

drwxr-xr-x 23 root root 0 Jan 1 08:00 regulator

-rw-r--r-- 1 root root 0 Jan 1 08:00 shrinker

drwxr-xr-x 2 root root 0 Jan 1 08:00 sunxi_pinctrl

drwxr-xr-x 2 root root 0 Jan 1 08:00 sunxi_soc_info

-r--r--r-- 1 root root 0 Jan 1 08:00 suspend_stats

-rwxr-xr-x 1 root root 0 Jan 1 08:00 suspend_time

-r--r--r-- 1 root root 0 Jan 1 08:00 sync

drwxr-xr-x 2 root root 0 Jan 1 08:00 usb

-r--r--r-- 1 root root 0 Jan 1 08:00 wakeup_sources

root@TinaLinux:/sys/kernel/debug#

（可见）

root@TinaLinux:/sys/kernel/debug#

root@TinaLinux:/sys/kernel/debug# cat pwm

platform/sunxi_pwm, 2 PWM devices

pwm-0 ((null) ):

pwm-1 (lcd ): requested enabled

root@TinaLinux:/sys/kernel/debug#

（tina v3.0.2中内置：）

W:\tina_v3.0\lichee\linux-3.4\drivers\misc\leds\Kconfig

W:\tina_v3.0\lichee\linux-3.4\drivers\misc\leds\Makefile

W:\tina_v3.0\lichee\linux-3.4\drivers\misc\leds\pwm_leds.c

W:\tina_v3.0\lichee\linux-3.4\drivers\misc\Makefile

obj-y += leds/

W:\tina_v3.0\lichee\linux-3.4\drivers\misc\Kconfig

source "drivers/misc/c2port/Kconfig"

source "drivers/misc/eeprom/Kconfig"

source "drivers/misc/cb710/Kconfig"

source "drivers/misc/iwmc3200top/Kconfig"

source "drivers/misc/ti-st/Kconfig"

source "drivers/misc/lis3lv02d/Kconfig"

source "drivers/misc/carma/Kconfig"

source "drivers/misc/altera-stapl/Kconfig"

source "drivers/misc/sw_3g_module/Kconfig"

source "drivers/misc/rf_pm/Kconfig"

source "drivers/misc/sunxi-clk-prepare/Kconfig"

source "drivers/misc/leds/Kconfig"

endmenu

rootroot@cm88:/home/wwt/tina_v3.0$ make kernel_menuconfig

Device Drivers --->

Misc devices --->

（在最后面，默认选中的）

<M> LEDs by PWM Control driver (NEW)

rootroot@cm88:/home/wwt/tina_v3.0$ make -j12

STMicroeletronics LIS3LV02Dx three-axis digital accelerometer (SPI) (SENSORS_LIS3_SPI) [N/m/y/?] n

STMicroeletronics LIS3LV02Dx three-axis digital accelerometer (I2C) (SENSORS_LIS3_I2C) [N/m/y/?] n

* Altera FPGA firmware download module

Altera FPGA firmware download module (ALTERA_STAPL) [N/m/y/?] n

Allwinner rf module pm driver (AW_RF_PM) [Y/n/?] y

LEDs by PWM Control driver (MISC_PWM_LEDS) [M/n/y/?] (NEW) y

刷机之后可见：

（通过ADB可见PWM1打开了）

root@TinaLinux:/# cd /sys/class/sunxi_dump

cd /sys/class/sunxi_dump

root@TinaLinux:/sys/class/sunxi_dump#

root@TinaLinux:/sys/class/sunxi_dump# ll

drwxr-xr-x 2 root root 0 Jan 1 08:29 .

drwxr-xr-x 48 root root 0 Jan 1 08:29 ..

-rw-r--r-- 1 root root 4096 Jan 1 08:29 compare

-rw-r--r-- 1 root root 4096 Jan 1 08:29 dump

-rw-r--r-- 1 root root 4096 Jan 1 08:29 write

root@TinaLinux:/sys/class/sunxi_dump#

root@TinaLinux:/sys/class/sunxi_dump# echo 0x01C208FC > dump;cat dump

echo 0x01C208FC > dump;cat dump

0x77222227

root@TinaLinux:/#

root@TinaLinux:/# find . -name pwm*

./sys/devices/virtual/misc/misc_dev/pwm_leds

./sys/kernel/debug/pwm

root@TinaLinux:/#

root@TinaLinux:/# cd /sys/kernel/debug

root@TinaLinux:/sys/kernel/debug# cat pwm

platform/sunxi_pwm, 2 PWM devices

pwm-0 (led_red ): requested

pwm-1 (led_blue ): requested enabled

root@TinaLinux:/sys/kernel/debug#

root@TinaLinux:/#

root@TinaLinux:/# cd /sys/devices/virtual/misc/misc_dev/pwm_leds

root@TinaLinux:/sys/devices/virtual/misc/misc_dev/pwm_leds#

root@TinaLinux:/sys/devices/virtual/misc/misc_dev/pwm_leds# ll

drwxr-xr-x 2 root root 0 Jan 1 08:30 .

drwxr-xr-x 4 root root 0 Jan 1 08:29 ..

-rw-rw-r-- 1 root root 4096 Jan 1 08:30 blue_func

-rw-rw-r-- 1 root root 4096 Jan 1 08:30 red_func

root@TinaLinux:/sys/devices/virtual/misc/misc_dev/pwm_leds#

root@TinaLinux:/sys/devices/virtual/misc/misc_dev/pwm_leds# cat blue_func

[ 367.939811] **** wyb drivers/misc/leds/pwm_leds.c-245-get_blue_func

root@TinaLinux:/sys/devices/virtual/misc/misc_dev/pwm_leds#

1默认值为9频率416.7HZ

root@TinaLinux:/sys/devices/virtual/misc/misc_dev/pwm_leds# echo 0 > blue_func

[ 387.486088] **** wyb drivers/misc/leds/pwm_leds.c-255-set_blue_func

[ 387.498988] pwm_id = 1,>>>function = 0+++

[ 387.505686] **** wyb drivers/misc/leds/pwm_leds.c-65-set_pwm

[ 387.523484] **** wyb drivers/misc/leds/pwm_leds.c-74-set_pwm

[ 387.529991] **** wyb drivers/misc/leds/pwm_leds.c-300-set_blue_func

root@TinaLinux:/sys/devices/virtual/misc/misc_dev/pwm_leds#

root@TinaLinux:/sys/devices/virtual/misc/misc_dev/pwm_leds# cat blue_func

[ 505.578676] **** wyb drivers/misc/leds/pwm_leds.c-245-get_blue_func

root@TinaLinux:/sys/devices/virtual/misc/misc_dev/pwm_leds#

配置值为0频率10KHZ最暗

root@TinaLinux:/sys/devices/virtual/misc/misc_dev/pwm_leds#

root@TinaLinux:/sys/devices/virtual/misc/misc_dev/pwm_leds# echo 1 > blue_func

[ 512.697534] **** wyb drivers/misc/leds/pwm_leds.c-255-set_blue_func

[ 512.709935] pwm_id = 1,>>>function = 1+++

[ 512.716597] **** wyb drivers/misc/leds/pwm_leds.c-65-set_pwm

[ 512.726517] **** wyb drivers/misc/leds/pwm_leds.c-74-set_pwm

[ 512.735989] **** wyb drivers/misc/leds/pwm_leds.c-300-set_blue_func

root@TinaLinux:/sys/devices/virtual/misc/misc_dev/pwm_leds#

root@TinaLinux:/sys/devices/virtual/misc/misc_dev/pwm_leds# cat blue_func

[ 578.443656] **** wyb drivers/misc/leds/pwm_leds.c-245-get_blue_func

root@TinaLinux:/sys/devices/virtual/misc/misc_dev/pwm_leds#

配置值为1频率10KHZ中等亮度

root@TinaLinux:/sys/devices/virtual/misc/misc_dev/pwm_leds#

root@TinaLinux:/sys/devices/virtual/misc/misc_dev/pwm_leds# echo 2 > blue_func [ 607.022921] **** wyb drivers/misc/leds/pwm_leds.c-255-set_blue_func

[ 607.037085] pwm_id = 1,>>>function = 2+++

[ 607.043501] **** wyb drivers/misc/leds/pwm_leds.c-65-set_pwm

[ 607.053190] **** wyb drivers/misc/leds/pwm_leds.c-74-set_pwm

[ 607.064587] **** wyb drivers/misc/leds/pwm_leds.c-300-set_blue_func

root@TinaLinux:/sys/devices/virtual/misc/misc_dev/pwm_leds#

root@TinaLinux:/sys/devices/virtual/misc/misc_dev/pwm_leds# echo 2 > blue_func

[ 662.857794] **** wyb drivers/misc/leds/pwm_leds.c-255-set_blue_func

[ 662.870006] pwm_id = 1,>>>function = 2+++

[ 662.877317] **** wyb drivers/misc/leds/pwm_leds.c-65-set_pwm

[ 662.890735] **** wyb drivers/misc/leds/pwm_leds.c-74-set_pwm

[ 662.898948] **** wyb drivers/misc/leds/pwm_leds.c-300-set_blue_func

root@TinaLinux:/sys/devices/virtual/misc/misc_dev/pwm_leds#

root@TinaLinux:/sys/devices/virtual/misc/misc_dev/pwm_leds# cat blue_func

[ 674.138688] **** wyb drivers/misc/leds/pwm_leds.c-245-get_blue_func

root@TinaLinux:/sys/devices/virtual/misc/misc_dev/pwm_leds#

配置为值为2频率10KHZ最高亮度：

root@TinaLinux:/sys/devices/virtual/misc/misc_dev/pwm_leds#

（有兴趣的可以看看：）

root@TinaLinux:/sys/devices/virtual/misc/misc_dev/pwm_leds# cd ..

root@TinaLinux:/sys/devices/virtual/misc/misc_dev#

root@TinaLinux:/sys/devices/virtual/misc/misc_dev# ll

drwxr-xr-x 4 root root 0 Jan 1 08:29 .

drwxr-xr-x 22 root root 0 Jan 1 08:29 ..

-r--r--r-- 1 root root 4096 Jan 1 08:29 dev

drwxr-xr-x 2 root root 0 Jan 1 08:30 power

drwxr-xr-x 2 root root 0 Jan 1 08:30 pwm_leds

lrwxrwxrwx 1 root root 0 Jan 1 08:30 subsystem -> ../../../../class/misc

-rw-r--r-- 1 root root 4096 Jan 1 08:29 uevent

root@TinaLinux:/sys/devices/virtual/misc/misc_dev#

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501在全志r16平台tinav3.0系统下调通pwm1的10KHZ波形

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