REVISION
Definition in file CODEC__spi.c.
#include "../SYSTEM/sys_hardware.h"
#include "codec.h"
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Functions | |
| void | CODEC__spiWrite (unsigned short cmd) |
| Function writes commands to Codec chip. | |
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Function writes commands to Codec chip.
Definition at line 35 of file CODEC__spi.c. References SYS_delayMicrosecond(). Referenced by CODEC_gain(), CODEC_hpVolume(), CODEC_init(), CODEC_mute(), and CODEC_power(). 00036 {
00037 unsigned short i;
00038 unsigned short iTmp;
00039
00040 SPI_lock(SYS_FOREVER);
00041
00042 // clear the clock. All data is latched in on the rising edge.
00043 iTmp = SPI_CLK;
00044
00045 // clear tuner data line to set to input.
00046 //iTmp = TUNER_DAT;
00047
00048 // clear the CODEC enable to enable.
00049 iTmp = CODEC_EN;
00050 SYS_delayMicrosecond(1);
00051 for (i = 0; i < 16; i++)
00052 {
00053 iTmp = SPI_CLK;
00054
00055 if (cmd & 0x8000) SPI_DATA = 0x0;
00056 else iTmp = SPI_DATA;
00057
00058 SYS_delayMicrosecond(1);
00059 SPI_CLK = 0x0;
00060 SYS_delayMicrosecond(1);
00061 cmd = cmd<<1;
00062 }
00063
00064 // disable the EEPROM;
00065 // asm (" ssbx XF");
00066
00067 // clear SPI clock
00068 iTmp = SPI_CLK;
00069
00070 // clear the DATA line, set to input.
00071 iTmp = SPI_DATA;
00072
00073 // clear the DATA line on the tuner to set to input
00074 //iTmp = TUNER_DAT;
00075
00076 // set codec enable to disable
00077 CODEC_EN = 0x0;
00078
00079 // put tuner in read mode.
00080 //iTmp = TUNER_WR;
00081
00082 SPI_unlock();
00083 }
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1.3.9.1