【FRDM-K64F使用笔记】之串口1的多个字符自动收发

chifen · 发表于 2015-11-13 22:40:24

1，采用 KSDK_1.3.0库，使用IAR（因为KEIL编译时CPU占用率为90%，所以暂用IAR快些）
2，对 C:\Freescale\KSDK_1.3.0\examples\frdmk64f\driver_examples\uart\uart_blocking下的工程进行改进，目地为了以后做AT指令的收发
3，实现方法，原来是1个字节的查询接收处理，在主程序里使用，对我以后做多字节接收不好处理，所以这里进行改动，把 UART_DRV_SendDataBlocking(BOARD_DEBUG_UART_INSTANCE, &rxChar, 1u, 1000u);去掉，加入

//接收用的最大字节数
#define received_size 250
//接收用的专用数组
uint8_t buffer_rece[received_size];
//---定义一个全局变量做自动接收用
uint32_t received_CountBuff;

复制代码

做自动接收串口数据用，
调用 UART_DRV_ReceiveData(BOARD_DEBUG_UART_INSTANCE, buffer_rece, received_size);进行串口接收初始化，把刚才定义的数组和最大长度代入
在查询的地方调用 UART_DRV_GetReceiveStatus(BOARD_DEBUG_UART_INSTANCE,&received_CountBuff );做查询，看看有没有收到内容
if(received_CountBuff>0&&received_CountBuff!=received_size) ，因为是自动接收所以加入一个延时之后可以做其它处理

源码更改的地方：

int main(void)
{
uint8_t rxChar = 0;
uint32_t byteCountBuff = 0;
uart_state_t uartState;
//串口定义
uart_user_config_t uartConfig = {
.bitCountPerChar = kUart8BitsPerChar,//8Bit
.parityMode = kUartParityDisabled, //校验位
.stopBitCount = kUartOneStopBit,//停止位
.baudRate = BOARD_DEBUG_UART_BAUD//波特率
};
// Enable clock for PORTs, setup board clock source, config pin
// IO 控制，包括时钟
hardware_init();
// Call OSA_Init to setup LP Timer for timeout
OSA_Init();
// Initialize the uart module with base address and config structure
//串口处理
UART_DRV_Init(BOARD_DEBUG_UART_INSTANCE, &uartState, &uartConfig);
// Inform to start blocking example
byteCountBuff = sizeof(buffStart);//得到一个数组的内容长度
//发送指定数组 buffStart，长为内容长度，BOARD_DEBUG_UART_INSTANCE 为是哪个串口号
UART_DRV_SendDataBlocking(BOARD_DEBUG_UART_INSTANCE, buffStart, byteCountBuff, 1000u);
// Inform user of what to do
byteCountBuff = sizeof(bufferData1);
UART_DRV_SendDataBlocking(BOARD_DEBUG_UART_INSTANCE, bufferData1, byteCountBuff, 1000u);
//设置自动接收的数组和最大长度
UART_DRV_ReceiveData(BOARD_DEBUG_UART_INSTANCE, buffer_rece, received_size);
// Send/receive blocking function
while(true)
{
// Wait to receive input data
/* if (kStatus_UART_Success == UART_DRV_ReceiveDataBlocking(BOARD_DEBUG_UART_INSTANCE, &rxChar, 1u, OSA_WAIT_FOREVER))
{
// Echo received character
UART_DRV_SendDataBlocking(BOARD_DEBUG_UART_INSTANCE, &rxChar, 1u, 1000u);
}*/
UART_DRV_GetReceiveStatus(BOARD_DEBUG_UART_INSTANCE,&received_CountBuff );
if(received_CountBuff>0&&received_CountBuff!=received_size)
{
Delay(200);
UART_DRV_SendDataBlocking(BOARD_DEBUG_UART_INSTANCE, bufferData1, byteCountBuff, 1000u);
Delay(200);
uartState.isRxBusy=0;
//重新给长度
// uartState.rxSize=received_size;
//重新初始化接收内容
UART_DRV_ReceiveData(BOARD_DEBUG_UART_INSTANCE, buffer_rece, received_size);
}
}
}
void Delay(uint32_t ms)
{
uint32_t i,k;
for(i=0; i<ms;i++)
{
for(k=0; k<7998; k++)
{
}
}
}