i2c readback and write command

main.c

@@ -1902,6 +1902,58 @@ static void cmd_gain(BaseSequentialStream *chp, int argc, char *argv[])
   tlv320aic3204_set_gain(lvalue, rvalue);
 }
 
+static int atoh(char *str){
+  int x = *str++;
+  if(x == 0)   return 0;
+  if(x >  'f') return 0;
+  if(x >= 'a') x -= 'a' - 10;
+  if(x >  'F') return 0;
+  if(x >= 'A') x -= 'A' - 10;
+  if(x >= '0') x -= '0';
+  if(x >= 16)  x = 0;
+  int y = *str;
+  if(y == 0)   return x;
+  if(y >  'f') return x;
+  if(y >= 'a') y -= 'a' - 10;
+  if(y >  'F') return x;
+  if(y >= 'A') y -= 'A' - 10;
+  if(y >= '0') y -= '0';
+  if(y >= 16)  return x;
+  return ((x << 4) | y);
+}
+
+extern void tlv320aic3204_bulk_write(const uint8_t *buf, int len);
+extern int tlv320aic3204_read(uint8_t d0);
+
+static void cmd_i2c(BaseSequentialStream *chp, int argc, char *argv[])
+{
+  int i;
+  /* 
+   *   If you use this command, you may need to stop scanning,
+   *  because of gain settings etc. during scanning.
+   */
+
+  if (argc == 0) {
+    chprintf(chp, "usage: i2c reg val1 [val2 [val3 [val4]]]   (write)\r\n       i2c reg    (read)\r\n");
+    return;
+  }
+  if (argc == 1) {
+    int x = atoh(*argv++);
+    x = tlv320aic3204_read(x);
+    chprintf(chp, "0x%02x\r\n", x);
+    return;
+  }
+  if (argc < 6) {
+    uint8_t buf[6];
+    uint8_t* p = buf;
+    for(i = 0; i < argc; i++){
+      *p++ = atoh(*argv++);
+    }
+    tlv320aic3204_bulk_write(buf, argc);
+    return;
+  }
+}
+
 static void cmd_port(BaseSequentialStream *chp, int argc, char *argv[])
 {
   int port;
@@ -1990,6 +2042,7 @@ static const ShellCommand commands[] =
     { "port", cmd_port },
     { "stat", cmd_stat },
     { "gain", cmd_gain },
+    { "i2c", cmd_i2c },
     { "power", cmd_power },
     { "sample", cmd_sample },
     //{ "gamma", cmd_gamma },

tlv320aic3204.c

@@ -50,12 +50,15 @@ static const uint8_t conf_data_clk[] = {
   //2, 0x3c, 25, /* Set the DAC Mode to PRB_P25 */
   2, 0x1b, 0x0c, /* Set the BCLK,WCLK as output */    
   2, 0x1e, 0x80 + 28, /* Enable the BCLKN divider with value 28 */
-  2, 0x25, 0xee, /* DAC power up */
-
+#if 0
+  2, 0x25, 0xee, /* DAC power up */                   // read only. page0/reg0x3F for DAC power up.
+#endif
   2, 0x12, 0x82, /* Power up the NADC divider with value 2 */
   2, 0x13, 0x87, /* Power up the MADC divider with value 7 */
   2, 0x14, 0x80, /* Program the OSR of ADC to 128 */
   2, 0x3d, 0x01, /* Select ADC PRB_R1 */
+  2, 0x00, 0x08,
+  2, 0x01, 0x04, /* Enable ADC adaptive mode */
   0 // sentinel
 };
 
@@ -74,8 +77,8 @@ static const uint8_t conf_data_routing[] = {
   2, 0x36, 0x10, /* Route IN2R to LEFT_N with 10K */
   2, 0x37, 0x04, /* Route IN3R to RIGHT_P with 10K */
   2, 0x39, 0x04, /* Route IN3L to RIGHT_N with 10K */
-  2, 0x3b, 0, /* Unmute Left MICPGA, Gain selection of 32dB to make channel gain 0dB */
-  2, 0x3c, 0, /* Unmute Right MICPGA, Gain selection of 32dB to make channel gain 0dB */
+  2, 0x3b, 0, /* Unmute Left MICPGA, Gain selection of 47.5dB to make channel gain 0dB */
+  2, 0x3c, 0, /* Unmute Right MICPGA, Gain selection of 47.5dB to make channel gain 0dB */
   0 // sentinel
 };
 
@@ -86,27 +89,24 @@ const uint8_t conf_data_unmute[] = {
   0 // sentinel
 };
 
-static void
-tlv320aic3204_bulk_write(const uint8_t *buf, int len)
+void tlv320aic3204_bulk_write(const uint8_t *buf, int len)
 {
   int addr = AIC3204_ADDR;
   i2cAcquireBus(&I2CD1);
   (void)i2cMasterTransmitTimeout(&I2CD1, addr, buf, len, NULL, 0, 1000);
   i2cReleaseBus(&I2CD1);
 }
 
-#if 0
-static int
-tlv320aic3204_read(uint8_t d0)
+int tlv320aic3204_read(uint8_t d0)
 {
   int addr = AIC3204_ADDR;
   uint8_t buf[] = { d0 };
   i2cAcquireBus(&I2CD1);
-  i2cMasterTransmitTimeout(&I2CD1, addr, buf, 1, buf, 1, 1000);
+  i2cMasterTransmitTimeout(&I2CD1, addr, buf, 1, NULL, 0, 1000);
+  i2cMasterReceiveTimeout(&I2CD1, addr, buf, 1, 1000);
   i2cReleaseBus(&I2CD1);
   return buf[0];
 }
-#endif
 
 static void
 tlv320aic3204_config(const uint8_t *data)