Trying to send continuous samples to pwm with the interrupt on DMA to reset samples to the beginning on pico 1 on and latest SDK, DMA appears to run once and then the pico hangs completely and I start getting "queue_event 346: ASSERT FAILED" on uart
Code:
struct { uint32_t left[AUDIO_N_DMA_BUFFERS][AUDIO_MAX_BUFFER_SIZE / 2]; uint32_t right[AUDIO_N_DMA_BUFFERS][AUDIO_MAX_BUFFER_SIZE / 2];} audio_dma_buffers;void dma_left_irq_handler() { dma_channel_set_read_addr(dma_ch_left_1, &audio_dma_buffers.left[0][0], false); dma_channel_set_trans_count(dma_ch_left_1, AUDIO_CURRENT_BUFFER_SIZE / 2, true); dma_irqn_acknowledge_channel(DMA_IRQ_0, dma_ch_left_1);}void dma_set() { dma_ch_left_1 = dma_claim_unused_channel(true); int pwm_ch_left = pwm_gpio_to_channel(PIN_LEFT_CH); int slice_num_left = pwm_gpio_to_slice_num(PIN_LEFT_CH); dma_channel_config cfg = dma_channel_get_default_config(dma_ch_left_1); channel_config_set_transfer_data_size(&cfg, DMA_SIZE_32); channel_config_set_read_increment(&cfg, true); channel_config_set_write_increment(&cfg, false); channel_config_set_dreq(&cfg, DREQ_PWM_WRAP0 + slice_num_left); uint32_t write_addr = (uint32_t) &pwm_hw->slice[slice_num_left].cc; if(pwm_ch_left) write_addr += 2; dma_channel_configure(dma_ch_left_1 , &cfg , (volatile void*) write_addr , &audio_dma_buffers.left[0][0] , AUDIO_CURRENT_BUFFER_SIZE / 2 , false); dma_channel_set_irq0_enabled(dma_ch_left_1, true); irq_set_exclusive_handler(DMA_IRQ_0, dma_left_irq_handler); irq_set_enabled(DMA_IRQ_0, true); dma_channel_start(dma_ch_left_1);}Code:
void pwm_init_for_44khz(void){ pwm_set_wrap(pwm_gpio_to_slice_num(PIN_LEFT_CH), WRAP_44KHZ); pwm_set_wrap(pwm_gpio_to_slice_num(PIN_RIGHT_CH), WRAP_44KHZ); pwm_set_clkdiv(pwm_gpio_to_slice_num(PIN_LEFT_CH), 2.4f); pwm_set_clkdiv(pwm_gpio_to_slice_num(PIN_RIGHT_CH), 2.4f); pwm_set_gpio_level(PIN_LEFT_CH, WRAP_44KHZ / 2); pwm_set_gpio_level(PIN_RIGHT_CH, WRAP_44KHZ / 2); uint32_t mask_slices = (1 << pwm_gpio_to_slice_num(PIN_LEFT_CH)) | (1 << pwm_gpio_to_slice_num(PIN_RIGHT_CH)); pwm_set_mask_enabled(mask_slices); s_pwm_max_wrap = WRAP_44KHZ;}void pwm_set(uint32_t freq, irq_handler_t on_pwm_wrap) { if(freq == 44100) { pwm_init_for_44khz(); } else if(freq == 48000) { pwm_init_for_48khz(); } pwm_set_irq_enabled(pwm_gpio_to_slice_num(PIN_LEFT_CH), true); pwm_set_irq_enabled(pwm_gpio_to_slice_num(PIN_RIGHT_CH), true);}Statistics: Posted by hugoballs — Sun Dec 08, 2024 8:58 am — Replies 2 — Views 37