关于TDA7564B的IIC驱动问题

只看该作者 · 2016-11-29 14:00

各位亲们，最近我在调试一款音频功放芯片TDA7564B，按照数据手册配置，总共7个步骤。能工作输出音频，可是只能配置一次，就是说如果配置后打开芯片使他工作，然后做其他操作（比如配置13db增益，静音、低功耗什么的），就不工作了，IIC通信是正常的。简单来说就是那7个步骤只能操作一次，在操作芯片就失效了，需要重新上电。
有哪位亲们对这方面配置有了解的，帮帮忙，感激不尽。

只看该作者 · 2016-11-29 14:03

ubyte Open_TDA7564B(void)
{
ubyte Databyte[2];
/* 1 */
Databyte[0] = 0B01000000;
Databyte[1] = 0B00000000;
CorfigIICData(IIC_TDA7564B_ADDR, IIC_TDA7564B_RECEIVE, Databyte, 2);
if(StartIIC0(Transmit) == FALSE)//主控发送
{
      return FALSE;
}
PIT1_DelayMs(2);

/* 2 */
CorfigIICData(IIC_TDA7564B_ADDR, IIC_TDA7564B_TRANSMISSION, Databyte, 4);
if(StartIIC0(Receive) == FALSE)//主控接收
{
      return FALSE;
}
PIT1_DelayMs(1);

/* 3 */
Databyte[0]  = 0B00000001;
Databyte[1]  = 0B00010011;
CorfigIICData(IIC_TDA7564B_ADDR, IIC_TDA7564B_RECEIVE, Databyte, 2);
if(StartIIC0(Transmit) == FALSE)//主控发送
{
      return FALSE;
}
PIT1_DelayMs(1);

/* 4 */
Databyte[0] = 0B00100110;
Databyte[1] = 0B00010000;
CorfigIICData(IIC_TDA7564B_ADDR, IIC_TDA7564B_RECEIVE, Databyte, 2);
if(StartIIC0(Transmit) == FALSE)//主控发送
{
      return FALSE;
}
PIT1_DelayMs(1);

/* 5 */
CorfigIICData(IIC_TDA7564B_ADDR, IIC_TDA7564B_TRANSMISSION, Databyte, 4);
if(StartIIC0(Receive) == FALSE)//主控接收
{
      return FALSE;
}
PIT1_DelayMs(1);

/* 6 */
Databyte[0] = 0B00011110;
Databyte[1] = 0B00010100;
CorfigIICData(IIC_TDA7564B_ADDR, IIC_TDA7564B_RECEIVE, Databyte, 2);
if(StartIIC0(Transmit) == FALSE)//主控发送
{
      return FALSE;
}
PIT1_DelayMs(2);

/* 7 */
CorfigIICData(IIC_TDA7564B_ADDR, IIC_TDA7564B_TRANSMISSION, Databyte, 4);
if(StartIIC0(Receive) == FALSE)//主控接收
{
      return FALSE;
}

return TRUE;
}
这是配置代码

只看该作者 · 2016-11-29 14:08

Examples of bytes sequence
1 - Turn-on diagnostic - Write operation
2 - Turn-on diagnostic - Read operation
The delay from 1 to 2 can be selected by software, starting from 1 ms
3a - Turn-on of the power amplifier with 26dB gain, mute on, diagnostic defeat, High eff.
mode both channels.
.
3b - Turn-off of the power amplifier
4 - Offset detection procedure enable
5 - Offset detection procedure stop and reading operation (the results are valid only for the
offset detection bits (D2 of the bytes DB1, DB2, DB3, DB4)
.
● The purpose of this test is to check if a D.C. offset (2V typ.) is present on the outputs,
produced by input capacitor with anomalous leakage current or humidity between pins.
● The delay from 4 to 5 can be selected by software, starting from 1ms
6 - Current detection procedure start (the AC inputs must be with a proper signal that
depends on the type of load)
7 - Current detection reading operation (the results valid only for the current sensor detection
bits - D5 of the bytes DB1, DB2, DB3, DB4)
.
● During the test, a sinus wave with a proper amplitude and frequency (depending on the
loudspeaker under test) must be present. The minimum number of periods that are
needed to detect a normal load is 5.
● The delay from 6 to 7 can be selected by software, starting from 1ms.

只看该作者 · 2016-11-29 14:08

小渠儿绿豆发表于 2016-11-29 14:08
Examples of bytes sequence
1 - Turn-on diagnostic - Write operation
2 - Turn-on diagnostic - Read op ...

数据手册的7个步骤

只看该作者 · 2016-11-29 16:02

有谁用过这款芯片

只看该作者 · 2016-11-29 19:53

已解决，步骤之间需要延时，在手册里有说明

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