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am335x为什么执行了display context 后显示的一部分区域就闪



软件包:AM335X_StarterWare

问题:

1:现在发现执行了display context 后显示的一部分区域就闪,可能出问题是那个地方没配好

2:RasterClkConfig ()中moduleClk是怎么来的,这个不懂

附:

void RasterClkConfig(unsigned int baseAddr, unsigned int pClk,
unsigned int moduleClk)
{
unsigned int clkDiv;

clkDiv = moduleClk / pClk ;

HWREG(baseAddr + LCDC_LCD_CTRL) = LCDC_LCD_CTRL_MODESEL;

HWREG(baseAddr + LCDC_LCD_CTRL) |= (clkDiv << LCDC_LCD_CTRL_CLKDIV_SHIFT);
}

请指教