static void i2s_run() { for (int i = 0; i < s_state->dma_desc_count; ++i) { lldesc_t* d = &s_state->dma_desc[i]; ESP_LOGV(TAG, "DMA desc %2d: %u %u %u %u %u %u %p %p", i, d->length, d->size, d->offset, d->eof, d
二:外部中断分组 的每一个GPIO都能配置成一个外部中断触发源,STM32 通过根据引脚的序号不同将众多中断触发源分成不同的组,比如:PA0,PB0,PC0,PD0,PE0,PF0,PG0为第一组,那么依此类推,我们能得出一共有16 组,STM32 规定,每一组中同时只能有一个中断触发源工作,那么,最多工作的也就是16个外部中断。 ST...
通过合理配置DMA,ESP32的I2S能够实现高吞吐量、低延迟的数据传输,适用于对实时性敏感的嵌入式应用。
An Adafruit GFX Compatible Library for the original ESP32, to drive 64x32px or 64x64px HUB75 LED matrix modules using the ESP32's DMA engine for high refresh rates. Supports panel chaining. - ESP32-HUB75-MatrixPanel-I2S-DMA/doc/memcalc.md at master · mc
An Adafruit GFX Compatible Library for the original ESP32, to drive 64x32px or 64x64px HUB75 LED matrix modules using the ESP32's DMA engine for high refresh rates. Supports panel chaining. - ESP32-HUB75-MatrixPanel-I2S-DMA/library.properties at master
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我在使用I2S过程中,在i2s_driver_install函数中添加了队列参数,并开启了一个线程去判断触发I2S_event DMA_TX 和DMA_rx的事件,发现会一直触发,并且size = 0;1 post • Page 1 of 1 Return to “ESP-IDF 中文讨论版” Jump to Who is online Users browsing this forum: Baidu [Spider] and 2 guests...
Q2: why does igrr's code set each DMA descriptor's EOF to 1? Q3: If no circular link-list is used but a set of descriptors whose size is the number of camera lines - is only the last descriptor's EOF one? The tech document on I2S camera processing states that data is passed whe...
ESP32-S2 External RAM / PSRAM + I2S LCD + DMAby faptastic » Sun May 19, 2024 1:16 am Hello. The TRM seems to imply that one can create a buffer in PSRAM memory, and use EDMA to send out via the I2S peripheral (for parallel output LCD mode). However, any attempts I try ...
bool MatrixPanel_I2S_DMA::allocateDMAmemory() { /*** * Step 1: Look at the overall DMA capable memory for the DMA FRAMEBUFFER data only (not the DMA linked list descriptors yet) * and do some pre-checks. */ int _num_frame_buffers = (m_cfg.double_buff) ? 2:1;...