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First we use 1 speaker output ,sound(volume) is OK.But when we change hardware to BTL mode and use 2 speaker output, sound(volume) is very small.Even i change the volume to max (change from 100->144),it also small.But we check the signal,the amplitude is OK,about 10V
开始我们是采用单speaker输出的,PBTL,这个状态下播放音乐音量是正常的。但是我们修改了硬件为BTL模式,采用双喇叭输出,软件没有改变。此时输出的音量非常小,即使我们把默认音量由100调整到144,依然是很小。但是用示波器看信号幅度是足够的,峰峰值大概有10V左右了。
check the parameter,i found register 02 is set to 0,that is PBTL .
查看寄存器,发现register 02的值是为0的,就是说还是PBTL的模式,没有变更为BTL的模式。
Please send us BTL mode parameter list,which parameter (register value)we need to change?
请帮忙提供BTL模式的参数列表,即有单喇叭变成双喇叭需要修改哪些寄存器的值?