summaryrefslogtreecommitdiff
path: root/firmware/drivers/dac.c
diff options
context:
space:
mode:
Diffstat (limited to 'firmware/drivers/dac.c')
-rw-r--r--firmware/drivers/dac.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/firmware/drivers/dac.c b/firmware/drivers/dac.c
index 0c12a8d912..9a40244292 100644
--- a/firmware/drivers/dac.c
+++ b/firmware/drivers/dac.c
@@ -16,23 +16,26 @@
16 * KIND, either express or implied. 16 * KIND, either express or implied.
17 * 17 *
18 ****************************************************************************/ 18 ****************************************************************************/
19#include "stdbool.h"
19#include "i2c.h" 20#include "i2c.h"
20#include "debug.h" 21#include "debug.h"
21#include "dac.h" 22#include "dac.h"
22 23
23int dac_volume(unsigned int volume) 24int dac_volume(unsigned int left, unsigned int right, bool deemph)
24{ 25{
25 int ret = 0; 26 int ret = 0;
26 unsigned char buf[3]; 27 unsigned char buf[3];
27 28
28 i2c_begin(); 29 i2c_begin();
29 30
30 if(volume > 0x38) 31 if (left > 0x38)
31 volume = 0x38; 32 left = 0x38;
33 if (right > 0x38)
34 right = 0x38;
32 35
33 buf[0] = DAC_REG_WRITE | DAC_AVOL; 36 buf[0] = DAC_REG_WRITE | DAC_AVOL;
34 buf[1] = (volume & 0x3f) | 0x40; /* Deemphasis ON */ 37 buf[1] = (left & 0x3f) | (deemph ? 0x40 : 0);
35 buf[2] = volume & 0x3f; 38 buf[2] = right & 0x3f;
36 39
37 /* send read command */ 40 /* send read command */
38 if (i2c_write(DAC_DEV_WRITE,buf,3)) 41 if (i2c_write(DAC_DEV_WRITE,buf,3))