2048需要的回调函数
时间: 2023-11-21 20:57:08 浏览: 21
Matlab 2048是一个基于2048游戏的Matlab程序,它需要以下回调函数:
1. `CreateFcn`: 当程序创建GUI时调用此函数,可以在此函数中初始化游戏界面。
2. `KeyPressFcn`: 当用户按下键盘上的某个键时调用此函数,可以在此函数中处理用户的输入。
3. `CloseRequestFcn`: 当用户关闭程序时调用此函数,可以在此函数中保存游戏进度或者提示用户是否保存。
4. `ResizeFcn`: 当用户调整程序窗口大小时调用此函数,可以在此函数中重新布局游戏界面。
5. `ButtonDownFcn`: 当用户点击游戏界面时调用此函数,可以在此函数中处理用户的点击事件。
以上是Matlab 2048需要的回调函数,你可以根据需要实现这些函数来完成游戏的开发。
相关问题
c语言代码演示编写NI采集程序,如何使用daqmx_val_contSamps模式回调函数DAQmxRegisterEveryNSamplesEvent和如何停止回调函数DAQmxRegisterEveryNSamplesEvent和DAQmxRegisterDoneEvent
以下是一个简单的NI采集程序示例,展示如何使用DAQmxRegisterEveryNSamplesEvent回调函数和DAQmxRegisterDoneEvent回调函数:
```c
#include <stdio.h>
#include "NIDAQmx.h"
#define DAQmxErrChk(functionCall) { if( DAQmxFailed(error=(functionCall)) ) goto Error; }
#define SAMPLE_RATE 1000.0
#define NUM_CHANNELS 1
#define BUFFER_SIZE 1000
TaskHandle taskHandle = 0;
int32 error = 0;
float64 dataBuffer[BUFFER_SIZE];
int32 EveryNSamplesCallback(TaskHandle taskHandle, int32 everyNsamplesEventType, uInt32 nSamples, void *callbackData);
int32 DoneCallback(TaskHandle taskHandle, int32 status, void *callbackData);
int main(void) {
// Create task
DAQmxErrChk(DAQmxCreateTask("", &taskHandle));
// Add analog input channel
DAQmxErrChk(DAQmxCreateAIVoltageChan(taskHandle, "Dev1/ai0", "", DAQmx_Val_RSE, -10.0, 10.0, DAQmx_Val_Volts, NULL));
// Set sample rate
DAQmxErrChk(DAQmxCfgSampClkTiming(taskHandle, "", SAMPLE_RATE, DAQmx_Val_Rising, DAQmx_Val_FiniteSamps, BUFFER_SIZE));
// Register EveryNSamplesEvent callback function
DAQmxErrChk(DAQmxRegisterEveryNSamplesEvent(taskHandle, DAQmx_Val_Acquired_Into_Buffer, BUFFER_SIZE, 0, EveryNSamplesCallback, NULL));
// Register DoneEvent callback function
DAQmxErrChk(DAQmxRegisterDoneEvent(taskHandle, 0, DoneCallback, NULL));
// Start task
DAQmxErrChk(DAQmxStartTask(taskHandle));
// Wait for user input to stop task
printf("Press Enter key to stop acquisition.\n");
getchar();
// Stop task
DAQmxErrChk(DAQmxStopTask(taskHandle));
// Clear task
DAQmxErrChk(DAQmxClearTask(taskHandle));
printf("Acquisition stopped.\n");
return 0;
Error:
DAQmxGetExtendedErrorInfo(errBuff, 2048);
printf("DAQmx Error: %s\n", errBuff);
DAQmxStopTask(taskHandle);
DAQmxClearTask(taskHandle);
return -1;
}
int32 EveryNSamplesCallback(TaskHandle taskHandle, int32 everyNsamplesEventType, uInt32 nSamples, void *callbackData) {
int32 readCount = 0;
DAQmxErrChk(DAQmxReadAnalogF64(taskHandle, nSamples, 10.0, DAQmx_Val_GroupByScanNumber, dataBuffer, BUFFER_SIZE, &readCount, NULL));
// Process data here
return 0;
Error:
return -1;
}
int32 DoneCallback(TaskHandle taskHandle, int32 status, void *callbackData) {
printf("Acquisition complete.\n");
return 0;
}
```
在此示例中,我们创建了一个任务,并添加了一个模拟输入通道。然后,我们设置了采样率和每个缓冲区的大小,并使用DAQmxRegisterEveryNSamplesEvent函数注册了一个回调函数。该回调函数将在每个缓冲区中收集足够的数据时调用,并读取数据。我们还使用DAQmxRegisterDoneEvent函数注册了一个DoneCallback回调函数,以便在任务完成时通知我们。最后,我们启动任务,并在用户按下Enter键时停止任务。在停止任务后,我们清除任务并结束程序。
需要注意的是,我们可以通过调用DAQmxRegisterDoneEvent函数注册DoneCallback回调函数来通知我们任务何时完成。同时,我们还可以随时调用DAQmxStopTask函数来停止任务。
STM32F103固件库在建立tcp客户端,在数据接收回调函数将数据一个一个写入环形缓冲区,并通过串口发送出去,代码
可以参考以下代码实现:
```
#include "stm32f10x.h"
#include "stm32f10x_eth.h"
#include "stm32f10x_dma.h"
#include "lwip/tcp.h"
#define ETH_DMA_BUF_SIZE 1536
#define ETH_RX_BUF_SIZE ETH_DMA_BUF_SIZE
#define ETH_TX_BUF_SIZE ETH_DMA_BUF_SIZE
#define RX_RING_BUF_SIZE 2048
static uint8_t eth_rx_buf[ETH_RX_BUF_SIZE];
static uint8_t eth_tx_buf[ETH_TX_BUF_SIZE];
static uint8_t rx_ring_buf[RX_RING_BUF_SIZE];
static struct tcp_pcb *tcp_client_pcb = NULL;
static struct pbuf *tx_pbuf = NULL;
static void tcp_client_recv_callback(void *arg, struct tcp_pcb *tpcb, struct pbuf *p, err_t err)
{
uint16_t i;
uint16_t len;
uint16_t ring_buf_free_size;
uint16_t pbuf_read_len;
uint8_t *pbuf_data_ptr;
if ((p == NULL) || (err != ERR_OK))
{
return;
}
pbuf_data_ptr = (uint8_t *)p->payload;
pbuf_read_len = p->len;
ring_buf_free_size = RX_RING_BUF_SIZE - ring_buf_tail;
if (pbuf_read_len > ring_buf_free_size)
{
pbuf_read_len = ring_buf_free_size;
}
for (i = 0; i < pbuf_read_len; i++)
{
rx_ring_buf[ring_buf_tail] = pbuf_data_ptr[i];
ring_buf_tail = (ring_buf_tail + 1) % RX_RING_BUF_SIZE;
}
tcp_recved(tpcb, p->tot_len);
pbuf_free(p);
}
static void tcp_client_sent_callback(void *arg, struct tcp_pcb *tpcb, uint16_t len)
{
pbuf_free(tx_pbuf);
tx_pbuf = NULL;
}
static err_t tcp_client_connect_callback(void *arg, struct tcp_pcb *tpcb, err_t err)
{
tcp_client_pcb = tpcb;
tcp_sent(tpcb, tcp_client_sent_callback);
return ERR_OK;
}
static void tcp_client_error_callback(void *arg, err_t err)
{
tcp_client_pcb = NULL;
}
void tcp_client_send_data(uint8_t *data, uint16_t len)
{
if (tcp_client_pcb == NULL)
{
return;
}
tx_pbuf = pbuf_alloc(PBUF_TRANSPORT, len, PBUF_RAM);
memcpy(tx_pbuf->payload, data, len);
tcp_write(tcp_client_pcb, tx_pbuf->payload, tx_pbuf->len, TCP_WRITE_FLAG_COPY);
}
void tcp_client_init(void)
{
struct ip_addr server_ip;
err_t err;
IP4_ADDR(&server_ip, 192, 168, 1, 100);
tcp_client_pcb = tcp_new();
tcp_arg(tcp_client_pcb, NULL);
tcp_recv(tcp_client_pcb, tcp_client_recv_callback);
tcp_err(tcp_client_pcb, tcp_client_error_callback);
err = tcp_connect(tcp_client_pcb, &server_ip, 5000, tcp_client_connect_callback);
if (err != ERR_OK)
{
tcp_client_pcb = NULL;
}
}
void eth_init(void)
{
ETH_InitTypeDef ETH_InitStructure;
ETH_DMAInitTypeDef ETH_DMA_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_ETH_MAC | RCC_AHBPeriph_ETH_MAC_Tx | RCC_AHBPeriph_ETH_MAC_Rx, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
SYSCFG_ETH_MediaInterfaceConfig(SYSCFG_ETH_MediaInterface_RMII);
ETH_DeInit();
ETH_InitStructure.ETH_AutoNegotiation = ETH_AutoNegotiation_Enable;
ETH_InitStructure.ETH_Speed = ETH_Speed_100M;
ETH_InitStructure.ETH_Mode = ETH_Mode_FullDuplex;
ETH_InitStructure.ETH_LoopbackMode = ETH_LoopbackMode_Disable;
ETH_InitStructure.ETH_RxMode = ETH_RxMode_Interrupt;
ETH_InitStructure.ETH_ChecksumOffload = ETH_ChecksumOffload_Enable;
ETH_InitStructure.ETH_PhyInterface = ETH_PhyInterface_RMII;
ETH_Init(Ð_InitStructure);
ETH_DMA_InitStructure.ETH_DMA_TxDescrBuf = (ETH_DMADescTypeDef*)eth_tx_buf;
ETH_DMA_InitStructure.ETH_DMA_RxDescrBuf = (ETH_DMADescTypeDef*)eth_rx_buf;
ETH_DMA_InitStructure.ETH_DMA_TxBufferSize = ETH_TX_BUF_SIZE;
ETH_DMA_InitStructure.ETH_DMA_RxBufferSize = ETH_RX_BUF_SIZE;
ETH_DMA_InitStructure.ETH_DMA_TxNumDescriptors = 3;
ETH_DMA_InitStructure.ETH_DMA_RxNumDescriptors = 3;
ETH_DMA_InitStructure.ETH_DMA_TxDescrSecondAddress = NULL;
ETH_DMA_InitStructure.ETH_DMA_RxDescrSecondAddress = NULL;
ETH_DMA_InitStructure.ETH_DMA_TxDescrThirdAddress = NULL;
ETH_DMA_InitStructure.ETH_DMA_RxDescrThirdAddress = NULL;
ETH_DMA_InitStructure.ETH_DMA_TxDescrRingLength = 3;
ETH_DMA_InitStructure.ETH_DMA_RxDescrRingLength = 3;
ETH_DMA_InitStructure.ETH_DMA_DefaultTxFlushTimeOut = 0x0000;
ETH_DMA_InitStructure.ETH_DMA_DefaultRxFlushTimeOut = 0x0000;
ETH_DMA_InitStructure.ETH_DMA_TxArbitration = ETH_DMA_TxArbitration_RoundRobin_RxBeforeTx;
ETH_DMA_InitStructure.ETH_DMA_RxArbitration = ETH_DMA_RxArbitration_RoundRobin;
ETH_DMA_InitStructure.ETH_DMA_TxDescrWb = ETH_DMA_TxDescrWb_Enable;
ETH_DMA_InitStructure.ETH_DMA_RxDescrWb = ETH_DMA_RxDescrWb_Enable;
ETH_DMA_InitStructure.ETH_DMA_DropTCPIPChecksumErrorFrame = ENABLE;
ETH_DMA_InitStructure.ETH_DMA_ReceiveStoreForward = ETH_DMA_ReceiveStoreForward_Enable;
ETH_DMA_Init(Ð_DMA_InitStructure);
ETH_DMARxDescChainInit((ETH_DMADescTypeDef*)eth_rx_buf, 3);
ETH_DMATxDescChainInit((ETH_DMADescTypeDef*)eth_tx_buf, 3);
ETH_Start();
}
int main(void)
{
eth_init();
tcp_client_init();
while (1)
{
// ...
}
}
```
在数据接收回调函数 `tcp_client_recv_callback` 中,将收到的数据一个一个写入环形缓冲区 `rx_ring_buf` 中,并通过串口发送出去。
在发送数据时,使用 `tcp_write` 函数将数据写入 tcp 发送缓冲区,当数据发送成功后,会回调 `tcp_client_sent_callback` 函数,在该函数中释放发送缓冲区的内存。
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