diff options
Diffstat (limited to 'src/inc/spi/dev/audio_vs1011.c')
-rwxr-xr-x | src/inc/spi/dev/audio_vs1011.c | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/src/inc/spi/dev/audio_vs1011.c b/src/inc/spi/dev/audio_vs1011.c new file mode 100755 index 0000000..ad44654 --- /dev/null +++ b/src/inc/spi/dev/audio_vs1011.c | |||
@@ -0,0 +1,173 @@ | |||
1 | #include "audio_vs1011.h" | ||
2 | /// inline void audio_vs1011_setVolume(unsigned char left, unsigned char right) | ||
3 | /// { audio_vs1011_cmd(SCI_VOL, left, right); } | ||
4 | |||
5 | void audio_vs1011_init() | ||
6 | { | ||
7 | // [initialize pins and ports] | ||
8 | DDRC |= ((1<<PC1) | (1<<PC2) | (1<<PC4)); // XCS/XDCS/RESET | ||
9 | DDRC &= ~(1<<PC3); // DREQ | ||
10 | //DDRA |= (1<<PA6); // activate O-Port A6 as [XCS] | ||
11 | //DDRC |= (1<<PC6); // activate O-Port C6 as [XDCS] | ||
12 | //DDRD |= (1<<PD6); // activate O-Port D6 as [RESET] | ||
13 | //DDRD &= ~(1<<PD5); // activate I-Port D5 as [DREQ] | ||
14 | |||
15 | |||
16 | // pins... | ||
17 | /// PORTA |= (1<<PA6); | ||
18 | /// PORTC |= (1<<PC6); | ||
19 | PORTC |= (1<<PC3); // enable pullup resistor for [DREQ] | ||
20 | audio_vs1011_exit_xcs(); // activate XCS: deactivate vs1011-cmd-line | ||
21 | audio_vs1011_exit_xdcs(); // activate XDCS: deactivate vs1011-data-line | ||
22 | |||
23 | // [reset vs1011] | ||
24 | // this ensures, that it finds XCS and XDCS in proper state (see below) | ||
25 | /// PORTD &= ~(1<<PD6); // <reset> | ||
26 | // Wait for at least 10 ms after startup (required!!) | ||
27 | // then make GPIO an output signal and set it to 1... | ||
28 | /// _delay_ms(20); | ||
29 | PORTC |= (1<<PC4); // </reset> | ||
30 | /// _delay_ms(20); | ||
31 | |||
32 | // wait until DREQ is set- so chip has rebooted from reset... | ||
33 | wait4dreq(); | ||
34 | |||
35 | // [set vs1011 to 'new-mode'] | ||
36 | // where xdcs is driven low, before you want to send mp3-data or test-bits | ||
37 | // where xcs is driven low to send SCI-commands. | ||
38 | // and both together may not been activated, why we started with resetting | ||
39 | // after having configured those output-ports. | ||
40 | audio_vs1011_cmd(SCI_MODE, (SM_SDINEW | SM_TESTS)); | ||
41 | |||
42 | // [set clock-frequency...] | ||
43 | // formular: | ||
44 | // 32768{if clock doubler} | ||
45 | // + (F_CRYSTAL{crystals frequency in Hz} / 2000{const}) | ||
46 | // = 0x9770 for a 12MHz-crystal (with clock-doubler), so send: | ||
47 | /// audio_vs1011_cmd(SCI_CLOCKF, 0x98, 0x00); | ||
48 | /// stdout_put_uint(uart_putc, ((F_CPU / 2000) | SC_CLK2X)); | ||
49 | /// stdout_put_string(uart_putc, "\t< clock freq for vs1011\n"); | ||
50 | |||
51 | audio_vs1011_cmd(SCI_CLOCKF, ((F_CPU / 2000) | SC_CLK2X)); | ||
52 | audio_vs1011_cmd(SCI_AUDATA, 44100); | ||
53 | |||
54 | /* | ||
55 | spi_setspeed(SPICLK_FAST); | ||
56 | int q; | ||
57 | for(q=0; q<=30000; q++) | ||
58 | spi_putc(0x00); | ||
59 | spi_setspeed(SPICLK_DEFAULT); | ||
60 | // wait for at least 11000 clock cycles... | ||
61 | */ | ||
62 | |||
63 | // wait until DREQ is set- so chip has rebooted from reset... | ||
64 | wait4dreq(); | ||
65 | |||
66 | |||
67 | /// spi_putc(0xFF); | ||
68 | |||
69 | audio_vs1011_setVolume(1, 1); // left and right both to 100%=0xFF | ||
70 | /// _delay_ms(250); | ||
71 | |||
72 | /// stdout_put_string(uart_putc, "clock frequency set!\n"); | ||
73 | } | ||
74 | |||
75 | |||
76 | void audio_vs1011_setVolume(const unsigned char left, const unsigned char right) | ||
77 | { | ||
78 | //uint16_t volume = right + (256 * left); | ||
79 | /// stdout_put_uint(uart_putc, volume); | ||
80 | /// stdout_put_string(uart_putc, "\t< new volume for vs1011\n"); | ||
81 | audio_vs1011_cmd(SCI_VOL, ((uint16_t) right) + ((uint16_t) left * 256)); | ||
82 | } | ||
83 | |||
84 | void audio_vs1011_test_volume() | ||
85 | { | ||
86 | audio_vs1011_setVolume(0, 0); // left and right to 0%=0x00 -> standby | ||
87 | _delay_ms(250); | ||
88 | audio_vs1011_setVolume(255, 255); // left and right both to 100%=0xFF | ||
89 | _delay_ms(250); | ||
90 | } | ||
91 | |||
92 | void audio_vs1011_test_sine() | ||
93 | { | ||
94 | static const unsigned char sinetest[] = {0x53, 0xEF, 0x6E, 0x30, 0x0, 0x0, 0x0, 0x0}; | ||
95 | static const unsigned char testexit[] = {'E', 'x', 'i', 't', 0x0, 0x0, 0x0, 0x0}; | ||
96 | |||
97 | /// audio_vs1011_setVolume(255, 255); // left and right both to 100%=0xFF | ||
98 | /// stdout_put_string(uart_putc, "activating sine-test...\n"); | ||
99 | audio_vs1011_dat(sinetest, sizeof(sinetest)); | ||
100 | _delay_ms(250); | ||
101 | |||
102 | /// stdout_put_string(uart_putc, "deactivating sine-test...\n"); | ||
103 | audio_vs1011_dat(testexit, sizeof(testexit)); | ||
104 | _delay_ms(250); | ||
105 | /// audio_vs1011_setVolume(255, 255); // left and right both to 100%=0xFF | ||
106 | } | ||
107 | |||
108 | /* | ||
109 | void audio_vs1011_test_eeprom() | ||
110 | { | ||
111 | unsigned char block[512]; | ||
112 | eeprom_read_block((void*) &block, (const void*) 0, 512); | ||
113 | |||
114 | int i,q; | ||
115 | for(i=0; i<512; i+=32) | ||
116 | { | ||
117 | audio_vs1011_enable(); | ||
118 | loop_until_bit_is_set(PIND, PD5); | ||
119 | for(q=0; q<32; q++) | ||
120 | spi_putc(block[i+q]); | ||
121 | audio_vs1011_disable(); | ||
122 | } | ||
123 | loop_until_bit_is_set(PIND, PD5); | ||
124 | _delay_ms(500); | ||
125 | } | ||
126 | */ | ||
127 | |||
128 | void audio_vs1011_dat(const unsigned char* dat, const unsigned char size) | ||
129 | { | ||
130 | audio_vs1011_enable(); | ||
131 | unsigned char i; | ||
132 | for(i=0; i<size; i++) | ||
133 | spi_putc(dat[i]); | ||
134 | audio_vs1011_disable(); | ||
135 | } | ||
136 | |||
137 | |||
138 | /* | ||
139 | unsigned char audio_vs1011_stream(unsigned char (*readfn)()) | ||
140 | { | ||
141 | audio_vs1011_enable(); | ||
142 | register unsigned char i; | ||
143 | for(i=0; i<32; i++) | ||
144 | spi_putc(readfn()); | ||
145 | audio_vs1011_disable(); | ||
146 | audio_vs1011_waitDREQ(); | ||
147 | return 32; | ||
148 | }*/ | ||
149 | |||
150 | |||
151 | |||
152 | |||
153 | void audio_vs1011_cmd(const unsigned char cmd, uint16_t dat) | ||
154 | { | ||
155 | loop_until_bit_is_set(PIND, PD5); | ||
156 | /// audio_vs1011_enable(); | ||
157 | //PORTA &= ~(1<<PA6); // <XCS> | ||
158 | audio_vs1011_init_xcs(); | ||
159 | spi_putc(VS_WRITE); | ||
160 | spi_putc(cmd); | ||
161 | spi_putc((dat >> 8) & 0xFF); | ||
162 | spi_putc((dat >> 0) & 0xFF); | ||
163 | //PORTA |= (1<<PA6); // </XCS> | ||
164 | audio_vs1011_exit_xcs(); | ||
165 | spi_putc(0); | ||
166 | spi_putc(0); | ||
167 | spi_putc(0); | ||
168 | spi_putc(0); | ||
169 | /// audio_vs1011_disable(); | ||
170 | /// _delay_ms(1); // << wait to make sure vs1011 got the message | ||
171 | _delay_ms(5); | ||
172 | loop_until_bit_is_set(PIND, PD5); // << wait for DREQ to become ready again | ||
173 | } | ||