如题，现在有这方面需求，谢谢

root@(none):/tmp# ./tinyplay 16000-stereo-s16_le-10s.wav -D 0
failed to open for pcm 0,0

看了内核打印声卡都有：
1.366236] debugfs: Directory 'soc@2002000:codec_plat' with parent 'audiocodec' already present!
[ 1.376538] sunxi-snd-mach soc@2002000:codec_mach: 42030000.codec <-> soc@2002000:codec_plat mapping ok
[ 1.388773] sunxi:sound-mach:[WARN]: 372 asoc_simple_parse_ucfmt(): set data late to default
[ 1.398399] sunxi-snd-mach soc@2002000:i2s0_mach: No 'sound-dai' property
[ 1.406426] debugfs: Directory '42032000.i2s0_plat' with parent 'sndi2s0' already present!
[ 1.416044] sunxi-snd-mach soc@2002000:i2s0_mach: snd-soc-dummy-dai <-> 42032000.i2s0_plat mapping ok
[ 1.432334] ALSA device list:
[ 1.435786] #0: audiocodec
[ 1.439051] #1: sndi2s0

有哪位大佬遇到过吗?麻烦指点一下哪里问题.

@sofia 版本是tinyalsa-1.1.1，在pcm.c调用ioctl(pcm->fd, SNDRV_PCM_IOCTL_HW_PARAMS, &params)失败，暂时不知道为什么?

root@(none):/tmp# ./tinyplay 16000-stereo-s16_le-10s.wav -D 0
failed to open for pcm 0,0

看了内核打印声卡都有：
1.366236] debugfs: Directory 'soc@2002000:codec_plat' with parent 'audiocodec' already present!
[ 1.376538] sunxi-snd-mach soc@2002000:codec_mach: 42030000.codec <-> soc@2002000:codec_plat mapping ok
[ 1.388773] sunxi:sound-mach:[WARN]: 372 asoc_simple_parse_ucfmt(): set data late to default
[ 1.398399] sunxi-snd-mach soc@2002000:i2s0_mach: No 'sound-dai' property
[ 1.406426] debugfs: Directory '42032000.i2s0_plat' with parent 'sndi2s0' already present!
[ 1.416044] sunxi-snd-mach soc@2002000:i2s0_mach: snd-soc-dummy-dai <-> 42032000.i2s0_plat mapping ok
[ 1.432334] ALSA device list:
[ 1.435786] #0: audiocodec
[ 1.439051] #1: sndi2s0

有哪位大佬遇到过吗?麻烦指点一下哪里问题.

@awwwwa 后面试了，发现输出只有2.4v到不了2.8，奇怪

如题。引脚高电平是3.3v，直接接usb转串口。接收无问题

@awwwwa 大神，把这个加上还是不行。还有其他地方需要修改吗

@awwwwa 谢谢大神指点。但1.8v也没指定，能输出，这是内核默认输出了?

v821的2.8v引脚没有输出,但1.8v有输出。有哪位大佬知道吗，设备树配置如下:

@eechino 问下哈,全志官方有cpu0~cpu3dehino 问下哈,全志官方有提供T153的Cortex-A7核的裸机开发包，能否提供下相关参考资料?还有remoteproc框架加载Cortex-A7裸机程序这方面资料有没

@eechino cpu3这个核那不是没用起来吗?还有E907这个mcu也是。有点浪费...

小核907开发包有所有中断的统计功能吗?谢谢