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#include "audio_vs1011.h"
/// inline void audio_vs1011_setVolume(unsigned char left, unsigned char right)
/// { audio_vs1011_cmd(SCI_VOL, left, right); }
void audio_vs1011_init()
{
// [initialize pins and ports]
DDRC |= ((1<<PC1) | (1<<PC2) | (1<<PC4)); // XCS/XDCS/RESET
DDRC &= ~(1<<PC3); // DREQ
//DDRA |= (1<<PA6); // activate O-Port A6 as [XCS]
//DDRC |= (1<<PC6); // activate O-Port C6 as [XDCS]
//DDRD |= (1<<PD6); // activate O-Port D6 as [RESET]
//DDRD &= ~(1<<PD5); // activate I-Port D5 as [DREQ]
// pins...
/// PORTA |= (1<<PA6);
/// PORTC |= (1<<PC6);
PORTC |= (1<<PC3); // enable pullup resistor for [DREQ]
audio_vs1011_exit_xcs(); // activate XCS: deactivate vs1011-cmd-line
audio_vs1011_exit_xdcs(); // activate XDCS: deactivate vs1011-data-line
// [reset vs1011]
// this ensures, that it finds XCS and XDCS in proper state (see below)
/// PORTD &= ~(1<<PD6); // <reset>
// Wait for at least 10 ms after startup (required!!)
// then make GPIO an output signal and set it to 1...
/// _delay_ms(20);
PORTC |= (1<<PC4); // </reset>
/// _delay_ms(20);
// wait until DREQ is set- so chip has rebooted from reset...
wait4dreq();
// [set vs1011 to 'new-mode']
// where xdcs is driven low, before you want to send mp3-data or test-bits
// where xcs is driven low to send SCI-commands.
// and both together may not been activated, why we started with resetting
// after having configured those output-ports.
audio_vs1011_cmd(SCI_MODE, (SM_SDINEW | SM_TESTS));
// [set clock-frequency...]
// formular:
// 32768{if clock doubler}
// + (F_CRYSTAL{crystals frequency in Hz} / 2000{const})
// = 0x9770 for a 12MHz-crystal (with clock-doubler), so send:
/// audio_vs1011_cmd(SCI_CLOCKF, 0x98, 0x00);
/// stdout_put_uint(uart_putc, ((F_CPU / 2000) | SC_CLK2X));
/// stdout_put_string(uart_putc, "\t< clock freq for vs1011\n");
audio_vs1011_cmd(SCI_CLOCKF, ((F_CPU / 2000) | SC_CLK2X));
audio_vs1011_cmd(SCI_AUDATA, 44100);
/*
spi_setspeed(SPICLK_FAST);
int q;
for(q=0; q<=30000; q++)
spi_putc(0x00);
spi_setspeed(SPICLK_DEFAULT);
// wait for at least 11000 clock cycles...
*/
// wait until DREQ is set- so chip has rebooted from reset...
wait4dreq();
/// spi_putc(0xFF);
audio_vs1011_setVolume(1, 1); // left and right both to 100%=0xFF
/// _delay_ms(250);
/// stdout_put_string(uart_putc, "clock frequency set!\n");
}
void audio_vs1011_setVolume(const unsigned char left, const unsigned char right)
{
//uint16_t volume = right + (256 * left);
/// stdout_put_uint(uart_putc, volume);
/// stdout_put_string(uart_putc, "\t< new volume for vs1011\n");
audio_vs1011_cmd(SCI_VOL, ((uint16_t) right) + ((uint16_t) left * 256));
}
void audio_vs1011_test_volume()
{
audio_vs1011_setVolume(0, 0); // left and right to 0%=0x00 -> standby
_delay_ms(250);
audio_vs1011_setVolume(255, 255); // left and right both to 100%=0xFF
_delay_ms(250);
}
void audio_vs1011_test_sine()
{
static const unsigned char sinetest[] = {0x53, 0xEF, 0x6E, 0x30, 0x0, 0x0, 0x0, 0x0};
static const unsigned char testexit[] = {'E', 'x', 'i', 't', 0x0, 0x0, 0x0, 0x0};
/// audio_vs1011_setVolume(255, 255); // left and right both to 100%=0xFF
/// stdout_put_string(uart_putc, "activating sine-test...\n");
audio_vs1011_dat(sinetest, sizeof(sinetest));
_delay_ms(250);
/// stdout_put_string(uart_putc, "deactivating sine-test...\n");
audio_vs1011_dat(testexit, sizeof(testexit));
_delay_ms(250);
/// audio_vs1011_setVolume(255, 255); // left and right both to 100%=0xFF
}
/*
void audio_vs1011_test_eeprom()
{
unsigned char block[512];
eeprom_read_block((void*) &block, (const void*) 0, 512);
int i,q;
for(i=0; i<512; i+=32)
{
audio_vs1011_enable();
loop_until_bit_is_set(PIND, PD5);
for(q=0; q<32; q++)
spi_putc(block[i+q]);
audio_vs1011_disable();
}
loop_until_bit_is_set(PIND, PD5);
_delay_ms(500);
}
*/
void audio_vs1011_dat(const unsigned char* dat, const unsigned char size)
{
audio_vs1011_enable();
unsigned char i;
for(i=0; i<size; i++)
spi_putc(dat[i]);
audio_vs1011_disable();
}
/*
unsigned char audio_vs1011_stream(unsigned char (*readfn)())
{
audio_vs1011_enable();
register unsigned char i;
for(i=0; i<32; i++)
spi_putc(readfn());
audio_vs1011_disable();
audio_vs1011_waitDREQ();
return 32;
}*/
void audio_vs1011_cmd(const unsigned char cmd, uint16_t dat)
{
loop_until_bit_is_set(PIND, PD5);
/// audio_vs1011_enable();
//PORTA &= ~(1<<PA6); // <XCS>
audio_vs1011_init_xcs();
spi_putc(VS_WRITE);
spi_putc(cmd);
spi_putc((dat >> 8) & 0xFF);
spi_putc((dat >> 0) & 0xFF);
//PORTA |= (1<<PA6); // </XCS>
audio_vs1011_exit_xcs();
spi_putc(0);
spi_putc(0);
spi_putc(0);
spi_putc(0);
/// audio_vs1011_disable();
/// _delay_ms(1); // << wait to make sure vs1011 got the message
_delay_ms(5);
loop_until_bit_is_set(PIND, PD5); // << wait for DREQ to become ready again
}
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