stm32 使用USART批量传送数据
各位老师帮忙解决一下/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_lib.h"
#include "platform_config.h"
USART_InitTypeDef USART_InitStructure;
ErrorStatus HSEStartUpStatus;
/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
void EXTI_Configuration(void);
void NVIC_Configuration(void);
void Delay(u32 nCount);
/* Private functions ---------------------------------------------------------
int main(void)
{
#ifdef DEBUG
debug();
#endif
/* System Clocks Configuration */
RCC_Configuration();
/* NVIC configuration */
NVIC_Configuration();
/* Configure the GPIO ports */
GPIO_Configuration();
/* Configure the EXTI Controller */
EXTI_Configuration();
/* USART1 and USART2 configuration ------------------------------------------------------*/
/* USART and USART2 configured as follow:
- BaudRate = 9600 baud
- Word Length = 9 Bits
- One Stop Bit
- No parity
- Hardware flow control disabled (RTS and CTS signals)
- Receive and transmit enabled
*/
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
/* Configure USART1 */
USART_Init(USART1, &USART_InitStructure);
/* Configure USART2 */
USART_Init(USART2, &USART_InitStructure);
/* Enable the USART1 */
USART_Cmd(USART1, ENABLE);
/* Enable the USART2 */
USART_Cmd(USART2, ENABLE);
/* Set the USART1 Address */
USART_SetAddress(USART1, 0x1);
/* Set the USART2 Address */
USART_SetAddress(USART2, 0x2);
/* Select the USART2 WakeUp Method */
USART_WakeUpConfig(USART2, USART_WakeUp_AddressMark);
while (1)
{
/* Send one byte from USART1 to USART 2 */
USART_SendData(USART1, 0x33);
/* Wait while USART1 TXE = 0 */
while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
{
}
} 其他黑颜色的字部分都是程序框架，而这红颜色字体部分如何修改才能够让我批量传送数据呀，或者传输字符也可以？？？求求老师们给予解答。。。。初次接触STM32,希望大家支持！
}
/*******************************************************************************
* Function Name: RCC_Configuration
* Description : Configures the different system clocks.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void RCC_Configuration(void)
{
/* RCC system reset(for debug purpose) */
RCC_DeInit();
/* Enable HSE */
RCC_HSEConfig(RCC_HSE_ON);
/* Wait till HSE is ready */
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus == SUCCESS)
{
/* Enable Prefetch Buffer */
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
/* Flash 2 wait state */
FLASH_SetLatency(FLASH_Latency_2);
/* HCLK = SYSCLK */
RCC_HCLKConfig(RCC_SYSCLK_Div1);
/* PCLK2 = HCLK */
RCC_PCLK2Config(RCC_HCLK_Div1);
/* PCLK1 = HCLK/2 */
RCC_PCLK1Config(RCC_HCLK_Div2);
/* PLLCLK = 8MHz * 9 = 72 MHz */
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
/* Enable PLL */
RCC_PLLCmd(ENABLE);
/* Wait till PLL is ready */
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{
}
/* Select PLL as system clock source */
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
/* Wait till PLL is used as system clock source */
while(RCC_GetSYSCLKSource() != 0x08)
{
}
}
/* Enable USART1, GPIOA, GPIO_KEY_BUTTON, GPIO_LED, GPIOx and AFIO clocks */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA |
RCC_APB2Periph_GPIO_KEY_BUTTON | RCC_APB2Periph_GPIO_LED |
RCC_APB2Periph_GPIOx | RCC_APB2Periph_AFIO, ENABLE);
/* Enable USART2 clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
}
/*******************************************************************************
* Function Name: GPIO_Configuration
* Description : Configures the different GPIO ports.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
#ifdef USE_STM3210B_EVAL
/* Enable the USART2 Pins Software Remapping */
GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);
#endif
/* Configure GPIO_LED Pin 6, GPIO_LED Pin 7, GPIO_LED Pin 8 and GPIO_LED Pin 9 as output push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIO_LED, &GPIO_InitStructure);
/* Configure USART1 Tx (PA.09) as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure USART2 Tx as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_TxPin;
GPIO_Init(GPIOx, &GPIO_InitStructure);
/* Configure USART1 Rx (PA.10) as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure USART2 Rx as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_RxPin;
GPIO_Init(GPIOx, &GPIO_InitStructure);
/* Configure PA.00 as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure Key Button GPIO Pin as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_PIN_KEY_BUTTON;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIO_KEY_BUTTON, &GPIO_InitStructure);
}
/*******************************************************************************
* Function Name: EXTI_Configuration
* Description : Configures the External Interrupts controller.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void EXTI_Configuration(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
/* Connect Key Button EXTI Line to Key Button GPIO Pin */
GPIO_EXTILineConfig(GPIO_PORT_SOURCE_KEY_BUTTON, GPIO_PIN_SOURCE_KEY_BUTTON);
/* Configure Key Button EXTI Line to generate an interrupt on falling edge */
EXTI_InitStructure.EXTI_Line = EXTI_LINE_KEY_BUTTON;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* Connect EXTI Line0 to PA.00 */
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource0);
/* Configure EXTI Line0 to generate an interrupt on rising edge */
EXTI_InitStructure.EXTI_Line = EXTI_Line0;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_Init(&EXTI_InitStructure);
}
/*******************************************************************************
* Function Name: NVIC_Configuration
* Description : Configures the nested vectored interrupt controller.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
#ifdefVECT_TAB_RAM
/* Set the Vector Table base location at 0x20000000 */
NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
#else/* VECT_TAB_FLASH*/
/* Set the Vector Table base location at 0x08000000 */
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif
/* Configure the NVIC Preemption Priority Bits */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
/* Enable the Key Button EXTI Line Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Enable the EXTI Line 0 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_Init(&NVIC_InitStructure);
}
/*******************************************************************************
* Function Name: Delay
* Description : Inserts a delay time.
* Input : nCount: specifies the delay time length.
* Output : None
* Return : None
*******************************************************************************/
void Delay(u32 nCount)
{
/* Decrement nCount value */
for(; nCount != 0; nCount--);
}
#ifdefDEBUG
/*******************************************************************************
* Function Name: assert_failed
* Description : Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* Input : - file: pointer to the source file name
* - line: assert_param error line source number
* Output : None
* Return : None
*******************************************************************************/
void assert_failed(u8* file, u32 line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif
/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/ 如果直接使用框架, 这个简单. 看怎么定义批量了, 举例:
#define DATANUM 200
u8cSendBuff;
假定了数据缓冲已经填满您要发送的数据, 然后:
u8cdatacnt = 0;
while (1)
{
/* Send one byte from USART1 to USART 2 */
USART_SendData(USART1, cSendBuff);
/* Wait while USART1 TXE = 0 */
while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
if(++cdatacnt >=DATANUM)break;
}
不过这个办法比较笨, 消耗很多 CPU 时间,好的办法是用中断, 当然更好是 DMA 啦. 谢啦谢啦，现在就试试这个方法。。呵呵，这个弄完还要学习用DMA批量传输数据。。。到时有不懂的地方各位要多帮帮忙呀:$ 串口调试助手显示接收到了200次数据，（因为设置的是200哈），但是没有显示接收到的内容，就是接收到了什么东东？字符还是数据？这样怎样设置呀？
串口调试助手一片空白。。。、
各位老师快快来帮忙呀。。。:$ 2楼的老师，我很崇拜你呀！可不可以给我解释一下哦？:$ 串口调试助手 可以设定成显示 hex 字符啊, 因为估计都是发送的 0, 不可显示嘛 我将cSendBuff这个数组设定了10个字符从a到j，输出的时候就都出来啦！O(∩_∩)O~。。。虽然不知道怎样循环显示，但终于显示了10个字符呀！二楼的老师谢谢你啦。。。是你给了我动力啊\(^o^)/
页:
[1]