stm8 串口模拟

只看该作者 · 2011-4-1 10:54

两台设备，一台用的是STM8 105C6T6（主机），另一台用的是STM8 105S4T6(从机)。主机用IO模拟串口同步传输（有一位起始位，一位停止位），波特率1200，用的是内部16M晶振。从机用的UART2接收，配置参数如下: UART2_Init((u32)1200, UART2_WORDLENGTH_8D, UART2_STOPBITS_1, UART2_PARITY_NO, UART1_SYNCMODE_CLOCK_ENABLE, UART2_MODE_RX_ENABLE); UART2_ITConfig(UART2_IT_RXNE_OR, ENABLE);
用示波器看主机发送的时序正确，如下图：
我用仿真器，一直进不到：UART2_RX_IRQHandler函数中设置的断点，不知道是什么原因呢？

只看该作者 · 2011-4-1 19:38

我测试发现：用两个都是STM8 105C6T6进行串口通讯正常（非模拟），把同样的程序改个cpu型号烧写到105S4T6上，串口通讯就不正常（表现为不能进入串口中断），难道105S4T6和105C6T6的串口使用方法不一样吗？

只看该作者 · 2011-4-1 19:39

我把程序贴出来，大家帮忙看看啊！先谢谢了！
void UART2_Configuration(void) //uart initial uart初始化
{
/* Enable general interrupts */ //開中斷
enableInterrupts();


UART2_DeInit();

UART2_Init((u32)1200, UART2_WORDLENGTH_8D, UART2_STOPBITS_1, UART2_PARITY_NO, UART2_SYNCMODE_CLOCK_DISABLE, UART2_MODE_TXRX_ENABLE);

UART2_ITConfig(UART2_IT_RXNE_OR, ENABLE);

}

void main(void)
{
_asm("sim");

CLK_Init(); //清時鐘

UART2_Configuration();

_asm("rim");

  while (1) {

}
}

只看该作者 · 2011-4-1 19:40

#include "stm8s_it.h"

extern void @near _stext(); /* startup routine */

void @near (* const _vectab[])() =
  {

(void @near (*)())0x8200,
_stext,                /* RESET */

(void @near (*)())0x8200,
NonHandledInterrupt, /* TRAP - Software interrupt */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq0 - External Top Level interrupt (TLI) */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq1 - Auto Wake Up from Halt interrupt */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq2 - Clock Controller interrupt */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq3 - External interrupt 0 (tim1A) */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq4 - External interrupt 1 (tim1B) */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq5 - External interrupt 2 (tim1C) */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq6 - External interrupt 3 (tim1D) */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq7 - External interrupt 4 (tim1E) */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq8 - CAN Rx interrupt */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq9 - CAN Tx/ER/SC interrupt */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq10 - SPI End of transfer interrupt */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq11 - TIM1 Update/Overflow/Trigger/Break interrupt */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq12 - TIM1 Capture/Compare interrupt */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq13 - TIM2 Update/Overflow/Break interrupt  */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq14 - TIM2 Capture/Compare interrupt */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq15 - TIM3 Update/Overflow/Break interrupt */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq16 - TIM3 Capture/Compare interrupt */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq17 - UART1 Tx complete interrupt */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq18 - UART1 Rx interrupt */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq19 - I2C interrupt */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq20 - UART2/UART3 Tx interrupt */

(void @near (*)())0x8200,
UART2_RX_IRQHandler, /* irq21 - UART2/UART3 Rx interrupt */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq22 - ADC1/ADC2 end of conversion interrupt */

(void @near (*)())0x8200,
TIM4_UPD_OVF_IRQHandler, /* irq23 - TIM4 Update/Overflow interrupt */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq24 - FLASH interrupt */

(void @near (*)())0x8200,
TIM4_UPD_OVF_IRQHandler, /* irq25 - Reserved */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq26 - Reserved */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq27 - Reserved */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq28 - Reserved */

(void @near (*)())0x8200,
NonHandledInterrupt, /* irq29 - Reserved */

  };

只看该作者 · 2011-4-1 19:40

@near @interrupt void UART2_RX_IRQHandler (void)
{
u8 r2temp1,r2temp2;

// UART2_ITConfig(UART2_IT_RXNE_OR, ENABLE);

/* In order to detect unexpected events during development,
   it is recommended to set a breakpoint on the following instruction.
*/
   /* Read one byte from the receive data register */

   RxBuffer[RxCounter++] = (UART2_ReceiveData8());


return;
}