STM32 sACN接收多个universe的标准库程序代码
时间: 2024-01-08 16:03:12 浏览: 160
ESPAsyncE131:用于Arduino ESP8266和ESP32的异步E1.31(sACN)库
以下是一个使用STM32标准库实现接收多个sACN universe的示例代码:
首先,需要使用HAL库进行初始化和配置。在main函数中,需要定义一个用于接收sACN数据的缓冲区,以及配置一个USART接收DMA通道。
```c
#include "stm32f1xx_hal.h"
#define CHANNELS_PER_UNIVERSE 512
#define NUM_UNIVERSES 2
#define NUM_CHANNELS (CHANNELS_PER_UNIVERSE * NUM_UNIVERSES)
uint8_t sACN_buffer[NUM_CHANNELS];
UART_HandleTypeDef huart1;
DMA_HandleTypeDef hdma_usart1_rx;
int main(void)
{
HAL_Init();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_USART1_CLK_ENABLE();
__HAL_RCC_DMA1_CLK_ENABLE();
GPIO_InitTypeDef GPIO_InitStruct;
GPIO_InitStruct.Pin = GPIO_PIN_9;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
huart1.Instance = USART1;
huart1.Init.BaudRate = 250000;
huart1.Init.WordLength = UART_WORDLENGTH_8B;
huart1.Init.StopBits = UART_STOPBITS_1;
huart1.Init.Parity = UART_PARITY_NONE;
huart1.Init.Mode = UART_MODE_RX;
huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
HAL_UART_Init(&huart1);
hdma_usart1_rx.Instance = DMA1_Channel5;
hdma_usart1_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_usart1_rx.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_usart1_rx.Init.MemInc = DMA_MINC_ENABLE;
hdma_usart1_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
hdma_usart1_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
hdma_usart1_rx.Init.Mode = DMA_CIRCULAR;
hdma_usart1_rx.Init.Priority = DMA_PRIORITY_LOW;
HAL_DMA_Init(&hdma_usart1_rx);
__HAL_LINKDMA(&huart1, hdmarx, hdma_usart1_rx);
HAL_UART_Receive_DMA(&huart1, sACN_buffer, NUM_CHANNELS);
while (1)
{
// Wait for DMA transfer to complete
HAL_Delay(10);
if (hdma_usart1_rx.State == HAL_DMA_STATE_READY)
{
// Process sACN data
for (int i = 0; i < NUM_UNIVERSES; i++)
{
uint16_t universe_offset = i * CHANNELS_PER_UNIVERSE;
uint8_t sequence_number = sACN_buffer[universe_offset + 12];
// Do something with the data...
}
HAL_UART_Receive_DMA(&huart1, sACN_buffer, NUM_CHANNELS);
}
}
}
```
在上述代码中,我们使用了DMA通道来接收sACN数据,并使用循环方式进行数据传输。在主循环中,我们等待DMA传输完成后,对接收到的sACN数据进行处理。对于多个universe,我们可以使用偏移量和通道数来确定每个universe的数据在缓冲区中的位置。
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