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STM32鐨凞MA锛堢洿鎺ュ瓨鍎插櫒瑷晱锛夋帶鍒跺櫒鏄竴绋挤澶х殑纭欢鍔熻兘锛屽彲鐢ㄤ簬瀵︾従(xi脿n)楂樻晥鐨勬暩(sh霉)鎿�(j霉)鍌宠几锛屽緸鑰屾笡杓旵PU鐨勮矤鎿�(d膩n)銆傛湰鏂囧皣鍚戞偍浠嬬垂濡備綍楂樻晥浣跨敤STM32鐨凞MA鎺у埗鍣紝骞舵彁渚涚浉闂�(gu膩n)浠ｇ⒓绀轰緥渚涘弮鑰冦€�

1. DMA宸ヤ綔鍘熺悊

DMA鎺у埗鍣ㄥ厑瑷卞瑷�(sh猫)鍜屽瓨鍎插櫒涔嬮枔鐩存帴閫茶鏁�(sh霉)鎿�(j霉)鍌宠几锛岀劇闇€CPU鐨勫共闋�(y霉)銆傞€氶亷浣跨敤DMA锛屽彲浠ラ’钁楁彁楂樻暩(sh霉)鎿�(j霉)鍌宠几?sh霉)鐢奉灎鐪侇枈MA鐨勫伐浣滃師鐞嗗涓嬶細

- 閰嶇疆DMA閫氶亾銆佸瑷�(sh猫)鍜屽瓨鍎插櫒鍦板潃浠ュ強鏁�(sh霉)鎿�(j霉)闀峰害绛夊弮鏁�(sh霉)銆�

- 鐣�(d膩ng)澶栬ō(sh猫)婧�(zh菙n)鍌欏ソ瑕佺櫦(f膩)閫佹垨鎺ユ敹鏁�(sh霉)鎿�(j霉)鏅傦紝鏈冭Ц鐧�(f膩)DMA鍌宠几璜嬫眰銆�

- DMA鎺у埗鍣ㄥ皣鏁�(sh霉)鎿�(j霉)寰炲瑷�(sh猫)璁€鍙栧埌绶╂矕鍗€(q奴)鎴�?q奴)顣�?sh霉)鎿�(j霉)寰炵珐娌栧崁(q奴)瀵叆澶栬ō(sh猫)锛岀洿鍒板偝杓稿畬鎴愩€�

2. DMA閰嶇疆姝ラ

浠ヤ笅鏄娇鐢⊿TM32CubeMX閰嶇疆DMA鐨勫熀鏈椹燂細

姝ラ1锛氭墦闁婼TM32CubeMX锛屽苟閬告搰鎮ㄧ殑MCU鍨嬭櫉鍜屽伐绋嬪瓨鍎蹭綅缃紝鍓�(chu脿ng)寤轰竴鍊嬫柊闋呯洰銆�

姝ラ2锛氬湪"Peripherals"閬搁爡鍗′腑閬告搰涓€鍊嬪瑷�(sh猫)锛堜緥濡俇SART銆丼PI銆丄DC绛夛級锛岀劧鍚庡暉鐢ㄧ浉鎳�(y墨ng)鐨凞MA鍌宠几銆�

姝ラ3锛氬湪"Pinout & Configuration"閬搁爡鍗′腑鐐篋MA閫氶亾鍒嗛厤鍚堥仼鐨勫瑷�(sh猫)寮曡叧銆�

姝ラ4锛氶€插叆"Configuration"閬搁爡鍗★紝鍦�"DMA Settings"閮ㄥ垎閰嶇疆DMA閫氶亾鐨勫弮鏁�(sh霉)锛屽鏁�(sh霉)鎿�(j霉)鏂瑰悜銆佸劒(y艒u)鍏堢礆銆佹暩(sh霉)鎿�(j霉)瀵害绛夈€�

姝ラ5锛氱敓鎴愪唬纰硷紝骞跺皣鐢熸垚鐨勪唬纰煎皫(d菐o)鍏ュ埌鎮ㄥ枩姝＄殑闁嬬櫦(f膩)鐠�(hu谩n)澧冧腑銆�

3. 浠ｇ⒓绀轰緥

浠ヤ笅鏄竴鍊嬬ず渚嬩唬纰硷紝灞曠ず浜嗗浣曚娇鐢―MA鍌宠几鏁�(sh霉)鎿�(j霉)鍒癠SART澶栬ō(sh猫)锛�

```c
#include "main.h"
#include "dma.h"
#include "usart.h"

#define BUFFER_SIZE 10

uint8_t txBuffer[BUFFER_SIZE] = "Hello DMA!";
uint8_t rxBuffer[BUFFER_SIZE];

int main(void)
{
  HAL_Init();
  SystemClock_Config();
  MX_DMA_Init();
  MX_USART1_UART_Init();

  // 閰嶇疆DMA鍌宠几
  HAL_DMA_Start(&hdma_usart1_tx, (uint32_t)txBuffer, (uint32_t)&USART1->TDR, BUFFER_SIZE);
  HAL_DMA_Start(&hdma_usart1_rx, (uint32_t)&USART1->RDR, (uint32_t)rxBuffer, BUFFER_SIZE);

  // 鍟熺敤DMA鍌宠几璜嬫眰
  __HAL_UART_ENABLE_IT(&huart1, UART_IT_IDLE);
  HAL_UART_Receive_DMA(&huart1, rxBuffer, BUFFER_SIZE);

  while (1)
  {
    // 鍦ㄦ铏曞彲浠ユ坊鍔犲叾浠栬檿鐞嗕唬纰�
  }
}

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
  // 鎺ユ敹瀹屾垚鍥炶(di脿o)鍑芥暩(sh霉)
  if (huart == &huart1)
  {
    // 鍦ㄦ铏曡檿鐞嗘帴鏀跺埌鐨勬暩(sh霉)鎿�(j霉)
  }
}

void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart)
{
  // 閷鍥炶(di脿o)鍑芥暩(sh霉)
  if (huart == &huart1)
  {
    // 鍦ㄦ铏曡檿鐞嗛尟瑾�
  }
}
```

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绲�(ji茅)鏉熻獮锛�

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