STM32与OPENMV通信
时间: 2023-07-16 10:11:34 浏览: 141
7175815686007997.stm32与OpenMV通信.zip
STM32和OpenMV的通信可以通过串口实现。以下是一个简单的示例代码:
在STM32上,初始化串口:
```c
#include "stm32f4xx_hal.h"
UART_HandleTypeDef huart2;
void SystemClock_Config(void);
int main(void)
{
HAL_Init();
SystemClock_Config();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_USART2_CLK_ENABLE();
GPIO_InitTypeDef GPIO_InitStruct = {0};
GPIO_InitStruct.Pin = GPIO_PIN_2|GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF7_USART2;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
huart2.Instance = USART2;
huart2.Init.BaudRate = 115200;
huart2.Init.WordLength = UART_WORDLENGTH_8B;
huart2.Init.StopBits = UART_STOPBITS_1;
huart2.Init.Parity = UART_PARITY_NONE;
huart2.Init.Mode = UART_MODE_TX_RX;
huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart2.Init.OverSampling = UART_OVERSAMPLING_16;
if (HAL_UART_Init(&huart2) != HAL_OK)
{
Error_Handler();
}
}
void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if(uartHandle->Instance==USART2)
{
__HAL_RCC_USART2_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
GPIO_InitStruct.Pin = GPIO_PIN_2|GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF7_USART2;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}
}
void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
{
if(uartHandle->Instance==USART2)
{
__HAL_RCC_USART2_CLK_DISABLE();
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_2|GPIO_PIN_3);
}
}
```
在OpenMV上,初始化串口:
```python
import time, serial
uart = serial.Serial("/dev/ttyACM0", baudrate=115200, timeout=1000)
while(True):
if (uart.any()):
data = uart.readline()
print(data)
```
在STM32上,向OpenMV发送数据:
```c
char data[] = "Hello OpenMV!\r\n";
HAL_UART_Transmit(&huart2, (uint8_t*)data, strlen(data), 1000);
```
在OpenMV上,向STM32发送数据:
```python
uart.write("Hello STM32!\r\n")
```
注意事项:
1. 在OpenMV上,串口的名称可能会有所不同,需要根据实际情况进行更改。
2. 在使用串口通信时,需要将STM32和OpenMV的地线连接在一起。
3. 在使用串口通信时,需要确保STM32和OpenMV的波特率相同。
阅读全文