From 2df2697107d7873232c31a25a6947711b0903edb Mon Sep 17 00:00:00 2001
From: Max Christian Pohle
Date: Mon, 27 Jul 2015 15:12:22 +0200
Subject: latest running version from march 2011, not having been in repo
 before, dcf77 working, mp3 playback and two display types are supported

---
 src/inc/spi/dev/audio_vs1011.c | 173 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 173 insertions(+)
 create mode 100755 src/inc/spi/dev/audio_vs1011.c

(limited to 'src/inc/spi/dev/audio_vs1011.c')

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 @@
+#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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