//!
//! @brief This function initializes the hardware/software resources
//! required for device CDC task.
//!
void AK5394A_task_init(void)
{
// Set up CS4344
// Set up GLCK1 to provide master clock for CS4344
gpio_enable_module_pin(GCLK1, GCLK1_FUNCTION); // for DA_SCLK
// LRCK is SCLK / 64 generated by TX_SSC
// so SCLK of 6.144Mhz ===> 96khz
pm_gc_setup(&AVR32_PM, AVR32_PM_GCLK_GCLK1, // gc
0, // osc_or_pll: use Osc (if 0) or PLL (if 1)
1, // pll_osc: select Osc0/PLL0 or Osc1/PLL1
1, // diven - enabled
0); // divided by 2. Therefore GCLK1 = 6.144Mhz
pm_gc_enable(&AVR32_PM, AVR32_PM_GCLK_GCLK1);
pm_enable_osc1_ext_clock(&AVR32_PM); // OSC1 is clocked by 12.288Mhz Osc
// from AK5394A Xtal Oscillator
pm_enable_clk1(&AVR32_PM, OSC1_STARTUP);
// Set up AK5394A
gpio_clr_gpio_pin(AK5394_RSTN); // put AK5394A in reset
gpio_clr_gpio_pin(AK5394_DFS0); // L L -> 48khz
gpio_clr_gpio_pin(AK5394_DFS1);
gpio_set_gpio_pin(AK5394_HPFE); // enable HP filter
gpio_clr_gpio_pin(AK5394_ZCAL); // use VCOML and VCOMR to cal
gpio_set_gpio_pin(AK5394_SMODE1); // SMODE1 = H for Master i2s
gpio_set_gpio_pin(AK5394_SMODE2); // SMODE2 = H for Master/Slave i2s
gpio_set_gpio_pin(AK5394_RSTN); // start AK5394A
while (gpio_get_pin_value(AK5394_CAL)); // wait till CAL goes low
// Assign GPIO to SSC.
gpio_enable_module(SSC_GPIO_MAP, sizeof(SSC_GPIO_MAP) / sizeof(SSC_GPIO_MAP[0]));
gpio_enable_pin_glitch_filter(SSC_RX_CLOCK);
gpio_enable_pin_glitch_filter(SSC_RX_DATA);
gpio_enable_pin_glitch_filter(SSC_RX_FRAME_SYNC);
gpio_enable_pin_glitch_filter(SSC_TX_CLOCK);
gpio_enable_pin_glitch_filter(SSC_TX_DATA);
gpio_enable_pin_glitch_filter(SSC_TX_FRAME_SYNC);
current_freq.frequency = 96000;
// set up SSC
ssc_i2s_init(ssc, 96000, 24, 32, SSC_I2S_MODE_STEREO_OUT_STEREO_IN, FPBA_HZ);
// set up PDCA
// In order to avoid long slave handling during undefined length bursts (INCR), the Bus Matrix
// provides specific logic in order to re-arbitrate before the end of the INCR transfer.
//
// HSB Bus Matrix: By default the HSB bus matrix mode is in Undefined length burst type (INCR).
// Here we have to put in single access (the undefined length burst is treated as a succession of single
// accesses, allowing re-arbitration at each beat of the INCR burst.
// Refer to the HSB bus matrix section of the datasheet for more details.
//
// HSB Bus matrix register MCFG1 is associated with the CPU instruction master interface.
AVR32_HMATRIX.mcfg[AVR32_HMATRIX_MASTER_CPU_INSN] = 0x1;
audio_buffer_in = 0;
spk_buffer_out = 0;
// Register PDCA IRQ interrupt.
pdca_set_irq();
// Init PDCA channel with the pdca_options.
pdca_init_channel(PDCA_CHANNEL_SSC_RX, &PDCA_OPTIONS); // init PDCA channel with options.
pdca_enable_interrupt_reload_counter_zero(PDCA_CHANNEL_SSC_RX);
pdca_init_channel(PDCA_CHANNEL_SSC_TX, &SPK_PDCA_OPTIONS); // init PDCA channel with options.
pdca_enable_interrupt_reload_counter_zero(PDCA_CHANNEL_SSC_TX);
//////////////////////////////////////////////
// Enable now the transfer.
pdca_enable(PDCA_CHANNEL_SSC_TX);
xTaskCreate(AK5394A_task,
configTSK_AK5394A_NAME,
configTSK_AK5394A_STACK_SIZE,
NULL,
configTSK_AK5394A_PRIORITY,
NULL);
}
void board_init(void)
{
// first change to OSC0 (12MHz)
pm_enable_osc0_crystal(& AVR32_PM, FOSC0); // Enable the Osc0 in crystal mode
pm_enable_clk0(& AVR32_PM, OSC0_STARTUP); // Crystal startup time
pm_switch_to_clock(& AVR32_PM, AVR32_PM_MCSEL_OSC0); // Then switch main clock to Osc0
pm_enable_osc1_ext_clock(& AVR32_PM); // ocs1 is external clock
pm_enable_clk1(& AVR32_PM, OSC1_STARTUP);
pm_pll_setup(&AVR32_PM
, 0 // pll
, 3 // mul
, 0 // div -> f_vfo = 16.384 MHz * 8 = 131.072 MHz
, 1 // osc
, 16 // lockcount
);
pm_pll_set_option(&AVR32_PM
, 0 // pll
, 1 // pll_freq (f_vfo range 80MHz - 180 MHz)
, 1 // pll_div2 (f_pll1 = f_vfo / 2)
, 0 // pll_wbwdisable
);
pm_pll_enable(&AVR32_PM, 0);
pm_wait_for_pll0_locked(&AVR32_PM);
pm_cksel(&AVR32_PM
, 1, 1 // PBA (CPU / 4) = 16.384 MHz
, 0, 0 // PBB 65.536 MHz
, 0, 0 // HSB = CPU 65.536 MHz
);
flashc_set_wait_state(1); // one wait state if CPU clock > 33 MHz
pm_switch_to_clock(&AVR32_PM, AVR32_PM_MCCTRL_MCSEL_PLL0); // switch to PLL0
// --------------------------------------
// USB clock
// Use 12MHz from OSC0 and generate 96 MHz
pm_pll_setup(&AVR32_PM, 1, // pll.
7, // mul.
1, // div.
0, // osc.
16); // lockcount.
pm_pll_set_option(&AVR32_PM, 1, // pll.
1, // pll_freq: choose the range 80-180MHz.
1, // pll_div2.
0); // pll_wbwdisable.
// start PLL1 and wait forl lock
pm_pll_enable(&AVR32_PM, 1);
// Wait for PLL1 locked.
pm_wait_for_pll1_locked(&AVR32_PM);
pm_gc_setup(&AVR32_PM, AVR32_PM_GCLK_USBB, // gc.
1, // osc_or_pll: use Osc (if 0) or PLL (if 1).
1, // pll_osc: select Osc0/PLL0 or Osc1/PLL1.
0, // diven.
0); // div.
pm_gc_enable(&AVR32_PM, AVR32_PM_GCLK_USBB);
// --------------------------------------
// LCD display
gpio_enable_gpio( lcd_gpio_map, sizeof( lcd_gpio_map ) / sizeof( lcd_gpio_map[0] ) );
int i;
for (i=0; i < (sizeof( lcd_gpio_map ) / sizeof( lcd_gpio_map[0] )); i++)
{
gpio_configure_pin( lcd_gpio_map[i].pin, lcd_gpio_map[i].function);
}
gpio_enable_module( lcd_pwm_gpio_map, sizeof( lcd_pwm_gpio_map ) / sizeof( lcd_pwm_gpio_map[0] ) );
// Backlight
AVR32_PWM.channel[6].CMR.cpre = 3;
AVR32_PWM.channel[6].cprd = 1000;
AVR32_PWM.channel[6].cdty = 500;
AVR32_PWM.ENA.chid6 = 1;
// contrast
AVR32_PWM.channel[0].CMR.cpre = 3;
AVR32_PWM.channel[0].cprd = 1000;
AVR32_PWM.channel[0].cdty = 520;
AVR32_PWM.ENA.chid0 = 1;
// switches
gpio_enable_gpio( switch_gpio_map, sizeof( switch_gpio_map ) / sizeof( switch_gpio_map[0] ) );
for (i=0; i < (sizeof( switch_gpio_map ) / sizeof( switch_gpio_map[0] )); i++)
{
gpio_configure_pin( switch_gpio_map[i].pin, switch_gpio_map[i].function);
}
// USART
gpio_enable_module( usart_gpio_map, sizeof( usart_gpio_map ) / sizeof( usart_gpio_map[0] ) );
}