SYLIXOS 龙芯2K1000 LCD屏参配置（2）

龙芯显控手册：

注意事项：

 操作的时钟寄存器：

#define LS2K_PIX0_PLL                       (0xffffffffbfe104b0)
#define LS2K_PIX1_PLL                       (0xffffffffbfe104c0)/*********************************************************************************************************
** 函数名称: __ls2xCalFreq
** 功能描述: 计算时钟寄存器的值
** 输　入  : uiPixClock    刷新频率
**           pllConfig     pll配置值
** 输　出  : ERROR CODE
** 全局变量:
** 调用模块:
*********************************************************************************************************/
static UINT  __ls2xCalFreq (UINT  uiPixClock, __LS2X_PIX_PLL_HANDLE  hPllCfg)
{UINT    uiDiv, uiLoop, uiFre;UINT    uiTa,  uiTb,   uiTc;UINT    uiMin = 1000;for (uiDiv = 1; uiDiv < 64; uiDiv++) {uiTa = (UINT)uiPixClock * uiDiv;for (uiFre = 3; uiFre < 6; uiFre++) {for (uiLoop = 24; uiLoop < 161; uiLoop++) {if ((uiLoop < 12 * uiFre) || (uiLoop > 32 * uiFre)) {continue;}uiTb = 100000L * uiLoop / uiFre;uiTc = (uiTa > uiTb) ? (uiTa - uiTb) : (uiTb - uiTa);if (uiTc < uiMin) {hPllCfg->LS2XPIXPLL_uiDiv = uiDiv;hPllCfg->LS2XPIXPLL_uiLoop = uiLoop;hPllCfg->LS2XPIXPLL_uiFre = uiFre;return  (PX_ERROR);}}}}return  (ERROR_NONE);
}/*********************************************************************************************************
** 函数名称: __ls2xConfigPll
** 功能描述: 配置时钟寄存器
** 输　入  : ullPllBase    时钟寄存器基址
**           pllCfg       配置值
** 输　出  : NONE
** 全局变量:
** 调用模块:
*********************************************************************************************************/
static VOID  __ls2xConfigPll (UINT64  ullPllBase, __LS2X_PIX_PLL_HANDLE  hPllCfg)
{UINT64    ui64out;UINT64    ui64Loop;UINT64    ui64Fre;UINT64    ui64Tmp = 1;#define __LS2X_LO_OFF                            (0)
#define __LS2X_HI_OFF                            (8)ui64Loop = hPllCfg->LS2XPIXPLL_uiLoop;ui64Fre  = hPllCfg->LS2XPIXPLL_uiFre;ui64out = (1 << 7) | (ui64Tmp << 42) | (3 << 10) |((UINT64)(ui64Loop) << 32) |((UINT64)(ui64Fre) << 26);write64(0, ullPllBase + __LS2X_LO_OFF);write64(1 << 19, ullPllBase + __LS2X_LO_OFF);write64(ui64out, ullPllBase + __LS2X_LO_OFF);write64(hPllCfg->LS2XPIXPLL_uiDiv, ullPllBase + __LS2X_HI_OFF);ui64out = (ui64out | (1 << 2));write64(ui64out, ullPllBase + __LS2X_LO_OFF);while (!(read64(ullPllBase + __LS2X_LO_OFF) & 0x10000)) ;write64((ui64out | 1), ullPllBase + __LS2X_LO_OFF);
}uiPixFreq = __LS2X_PICOS2KHZ(hLcdPanel->uiPixelClk);uiRet = __ls2xCalFreq(uiPixFreq, &hPllCfg);if (uiRet) {__ls2xConfigPll(LS2K_PIX0_PLL, &hPllCfg);__ls2xConfigPll(LS2K_PIX1_PLL, &hPllCfg);}