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我正在一個名爲TSL2301的線掃描ccd傳感器。我想通過USART讀取像素爲stm32f103,但總是我只能接收到0xFF,是否有人使用此傳感器來幫助我? 我使用了Usart同步模式的STM32f10x,我向Usart發送了一些命令給傳感器,並且想要在每個命令後進行8個時鐘延遲。我該怎麼做?如何使用TSL2301,並使時鐘延遲在美國
int count=0;
int i=0;
uint8_t data[102]={0};
USART_ClockInitStructure.USART_Clock = USART_Clock_Enable;
USART_ClockInitStructure.USART_CPOL = USART_CPOL_High;
USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;
USART_ClockInitStructure.USART_LastBit = USART_LastBit_Enable;
USART_ClockInit(USARTy, &USART_ClockInitStructure);
USART_InitStructure.USART_BaudRate = 2200000;
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;
USART_Init(USARTy, &USART_InitStructure);
/* Configure the USARTy */
USART_Init(USARTy, &USART_InitStructure);
/* Enable the USARTy */
USART_Cmd(USARTy, ENABLE);
while(1)
{
while(count < 3)
{
USART_SendData(USARTy,0xFF);
while(USART_GetFlagStatus(USARTy, USART_FLAG_TC) == RESET);
count++;
}
count=0;
USART_SendData(USARTy,0x1b); //RESET command
while(USART_GetFlagStatus(USARTy, USART_FLAG_TC) == RESET);
USART_SendData(USARTy,0x1b);
while(USART_GetFlagStatus(USARTy, USART_FLAG_TC) == RESET);
USART_SendData(USARTy,0x1b);
while(USART_GetFlagStatus(USARTy, USART_FLAG_TC) == RESET);
USART_SendData(USARTy,0x08); //StartInt Command
while(USART_GetFlagStatus(USARTy, USART_FLAG_TC) == RESET);
while(count < 20)//DelayIntegrationTime() ;
{
USART_SendData(USARTy,0xFF);
while(USART_GetFlagStatus(USARTy, USART_FLAG_TC) == RESET);
count++;
}
count = 0;
USART_SendData(USARTy,0x10); //SampleInt Command
while(USART_GetFlagStatus(USARTy, USART_FLAG_TC) == RESET);
USART_SendData(USARTy,0x02); //ReadPixel Command
while(USART_GetFlagStatus(USARTy, USART_FLAG_TC) == RESET);
while(count < 2)
{
USART_SendData(USARTy,0xFF);
while(USART_GetFlagStatus(USARTy, USART_FLAG_TC) == RESET);
count++;
}
count = 0;
USART_Cmd(USARTy, DISABLE);
USART_ClockInitStructure.USART_CPOL = USART_CPOL_High;
USART_ClockInitStructure.USART_CPHA = USART_CPHA_1Edge;
USART_ClockInit(USARTy, &USART_ClockInitStructure);
USART_Init(USARTy, &USART_InitStructure);
USART_Cmd(USARTy, ENABLE);
/*read pixels*/
for (i = 0; i < 102; i++)
{
while(USART_GetFlagStatus(USARTy, USART_FLAG_RXNE) == RESET);
data[i] = USART_ReceiveData(USARTy);
while(count < 1)
{
USART_SendData(USARTy,0xFF);
while(USART_GetFlagStatus(USARTy, USART_FLAG_TC) == RESET);
count++;
}
count = 0;
}
USART_Cmd(USARTy, DISABLE);
USART_ClockInitStructure.USART_CPOL = USART_CPOL_High;
USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;
USART_ClockInit(USARTy, &USART_ClockInitStructure);
USART_Init(USARTy, &USART_InitStructure);
USART_Cmd(USARTy, ENABLE);
}
謝謝,我再讀一遍,請告訴我,如果你發現,我會等着... – Mahtab
我有一個奇怪的解決方案。它應該在理論上工作,但我無法測試它。首先是硬件。你應該計算可以接受UART接收器的最大頻率。應該是大約1MBit/s。 其次,你必須在這個頻率上配置定時器,使時鐘信號的傳感器,並把它連接到MCU 的SPI CLK 是的,你必須使用SPI發送同步數據 SPI MISO引腳應連接到傳感器串行輸入 – picoworm
SPI必須配置爲從機並具有16位數據幀。您必須將SPI寄存器設置爲0xffff才能使IDLE USART輸出。當你需要發送數據時,你必須建立1個起始位,而不是數據,然後停止位,這應該需要10位SPI數據寄存器,6位保持設置爲1 – picoworm