CMSIS-RTOS printf调试串口输出问题请教

wanyhong · 发表于 2017-5-25 16:24:44

问题：使用printf串口1没有任何输出

已经在RTE_device.h中启用USART功能
已经添加Compiler(I/O:STDOUT)
已经调用stdout_init初始化

附代码
串口初始化代码：
[mw_shl_code=c,true]
#include "Driver_USART.h"
#include "stdout_usart.h"
#include "stdio.h"

//-------- <<< Use Configuration Wizard in Context Menu >>> --------------------

// <h>STDOUT USART Interface

// <o>Connect to hardware via Driver_USART# <0-255>
// <i>Select driver control block for USART interface
#define USART_DRV_NUM          1

// <o>Baudrate
#define USART_BAUDRATE       115200

// </h>

#define _USART_Driver_(n)  Driver_USART##n
#define  USART_Driver_(n) _USART_Driver_(n)

extern ARM_DRIVER_USART  USART_Driver_(USART_DRV_NUM);
#define ptrUSART    (&USART_Driver_(USART_DRV_NUM))

/**
  Initialize stdout

  \return       0 on success, or -1 on error.
*/
int stdout_init (void) {
  int32_t status;

  status = ptrUSART->Initialize(NULL);
  if (status != ARM_DRIVER_OK) return (-1);

  status = ptrUSART->PowerControl(ARM_POWER_FULL);
  if (status != ARM_DRIVER_OK) return (-1);

  status = ptrUSART->Control(ARM_USART_MODE_ASYNCHRONOUS |
                           ARM_USART_DATA_BITS_8    |
                           ARM_USART_PARITY_NONE    |
                           ARM_USART_STOP_BITS_1    |
                           ARM_USART_FLOW_CONTROL_NONE,
                           USART_BAUDRATE);
  if (status != ARM_DRIVER_OK) return (-1);

  status = ptrUSART->Control(ARM_USART_CONTROL_TX, 1);
  if (status != ARM_DRIVER_OK) return (-1);

  return (0);
}

/**
  Put a character to the stdout

  \param[in] ch  Character to output
  \return       The character written, or -1 on write error.
*/
int stdout_putchar (int ch) {
  uint8_t buf[1];

  buf[0] = ch;
  if (ptrUSART->Send(buf, 1) != ARM_DRIVER_OK) {
return (-1);
  }
  while (ptrUSART->GetTxCount() != 1);
  return (ch);
}
[/mw_shl_code]