Arduino ड्यू पर ध्वनि उत्पादन

//   static uint16_t g_buffer[4096]; //   ,        static volatile uint16_t g_buffer_head, g_buffer_tail, g_buffer_size; //         static inline uint16_t get_continuous_data_size_irq(void) { return g_buffer_head <= g_buffer_tail ? g_buffer_tail - g_buffer_head : ARRAYSIZE(g_buffer) - g_buffer_head; } //       static inline uint16_t get_buffer_capacity(void) { return g_buffer_size; } //     static uint16_t copy_in_buffer(const uint16_t * data, uint16_t size) { uint16_t tail = g_buffer_tail; //        uint32_t to_copy = min(size, ARRAYSIZE(g_buffer) - tail); memcpy((void *)(g_buffer + tail), (void *)data, (size_t)(to_copy << 1)); if (to_copy < size) { //        memcpy(g_buffer, data + to_copy, (size - to_copy) << 1); tail = size - to_copy; } else { //        tail += size; } return tail; } //     ,    static inline void move_head_irq(uint16_t size) { g_buffer_head += size; g_buffer_size += size; if (g_buffer_head >= ARRAYSIZE(g_buffer) && g_buffer_head > g_buffer_tail) g_buffer_head -= ARRAYSIZE(g_buffer); } //      PDC //    static pdc_packet_t g_pdc_packet; //     PDC static volatile uint32_t g_pdc_packet_size; //   0,  PDC    static volatile uint8_t g_pdc_active; //    DACC static inline void disable_irq(void) { dacc_disable_interrupt(DACC, DACC_IER_ENDTX); } //  PDC ,     DACC static inline void restore_irq(void) { if (g_pdc_active) dacc_enable_interrupt(DACC, DACC_IER_ENDTX); } #define DACC_PDC_PACKET_MAX_SIZE 512 //   DACC // ,      PDC void DACC_Handler(void) { //   uint32_t status = dacc_get_interrupt_status(DACC); if (status & DACC_IER_ENDTX) { //   ,   move_head_irq(g_pdc_packet_size); uint16_t data_size = get_continuous_data_size_irq(); if (data_size == 0) { //   g_pdc_packet_size = 0; g_pdc_active = 0; //    DACC dacc_disable_interrupt(DACC, DACC_IDR_ENDTX); } else { //  PDC     g_pdc_packet.ul_addr = (uint32_t)(g_buffer + g_buffer_head); g_pdc_packet_size = min(DACC_PDC_PACKET_MAX_SIZE, data_size); g_pdc_packet.ul_size = g_pdc_packet_size; //  pdc_tx_init(PDC_DACC, &g_pdc_packet, NULL); } } } //   0 TC      static void tc_adjust_frequency(uint16_t frequency) { uint32_t divider = sysclk_get_cpu_hz() / frequency; divider >>= 1; tc_write_ra(TC0, 0, divider); tc_write_rc(TC0, 0, divider + 1); } //   void sound_init_hardware(void) { //   TC sysclk_enable_peripheral_clock(ID_TC0); //  TC0   waveform tc_init(TC0, 0, TC_CMR_TCCLKS_TIMER_CLOCK1 | TC_CMR_WAVE /* Waveform mode is enabled */ | TC_CMR_ACPA_SET /* RA Compare Effect: set */ | TC_CMR_ACPC_CLEAR /* RC Compare Effect: clear */ | TC_CMR_CPCTRG /* UP mode with automatic trigger on RC Compare */ ); //  -   TC,    tc_adjust_frequency(8000); //   tc_start(TC0, 0); //   DACC sysclk_enable_peripheral_clock(ID_DACC); //    DACC dacc_reset(DACC); //  DACC   "half word" dacc_set_transfer_mode(DACC, 0); //    dacc_set_power_save(DACC, 0, 0); //   TC0    dacc_set_trigger(DACC, 1); //  TAG     DACC dacc_set_channel_selection(DACC, 1); //    DACC dacc_enable_channel(DACC, 1); //     dacc_set_analog_control(DACC, DACC_ACR_IBCTLCH0(0x02) | DACC_ACR_IBCTLCH1(0x02) | DACC_ACR_IBCTLDACCORE(0x01)); //    DACC   NVIC_DisableIRQ(DACC_IRQn); NVIC_ClearPendingIRQ(DACC_IRQn); NVIC_EnableIRQ(DACC_IRQn); //   PDC     DACC pdc_enable_transfer(PDC_DACC, PERIPH_PTCR_TXTEN); //    g_pdc_packet_size = 0; g_pdc_active = 0; } //        void sound_start(uint16_t frequency) { //     sound_stop(); //   tc_adjust_frequency(frequency); } //    void sound_stop(void) { //   DACC  dacc_disable_interrupt(DACC, DACC_IER_ENDTX); g_pdc_packet_size = 0; g_buffer_head = g_buffer_tail = 0; g_buffer_size = ARRAYSIZE(g_buffer); g_pdc_active = 0; } //          uint8_t sound_data(const uint16_t * data, uint16_t size) { //    uint16_t capacity = get_buffer_capacity(); if (capacity < size) return 0; //     uint16_t tail = copy_in_buffer(data, size); //    disable_irq(); g_buffer_tail = tail; g_buffer_size -= size; if (g_buffer_head >= ARRAYSIZE(g_buffer)) g_buffer_head -= ARRAYSIZE(g_buffer); g_pdc_active = 1; restore_irq(); //    return 1; } 

 #include <asf.h> #include "sound.h" #define STRING_HEADER "-- Sound firmware --\r\n" \ "-- "BOARD_NAME" --\r\n" \ "-- Compiled: "__DATE__" "__TIME__" --\r" static void configure_console(void) { const usart_serial_options_t uart_serial_options = { .baudrate = 115200, .paritytype = UART_MR_PAR_NO }; sysclk_enable_peripheral_clock(ID_UART); stdio_serial_init(UART, &uart_serial_options); } #include "sound_data.c" static uint32_t g_sound_pos = 0; int main (void) { sysclk_init(); board_init(); configure_console(); puts(STRING_HEADER); printf("CPU Frequency %li MHz\r\n", sysclk_get_cpu_hz() / 1000000); sound_init_hardware(); sound_start(16000); puts("Work...\r"); while (1) { //    512   ,   uint32_t size = min(512, ARRAYSIZE(g_sound_data) - g_sound_pos); if (sound_data(g_sound_data + g_sound_pos, size)) { //      g_sound_pos += size; if (g_sound_pos >= ARRAYSIZE(g_sound_data)) g_sound_pos = 0; } else { //    ,    } } }