1 《C66x CorePac User's Guide》中看到L1PCFG寄存器地址为0x01840020,C6678内8个 core的cache配置都是按这个寄存器统一配置吗?各core能否单独进行有差异的cache配置?
2 在C6678中UART只有一个,以下使用场景是否合理?在core0中进行UART初始化配置,然后各 core可以互斥地占用串口来进行数据收发。
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Andy Yin1 你好,在官方提供的GEL文件内看到:
// Only core 0 can set these
if (DNUM == 0)
{
for (count = 0; count < PLL_REINIT_MAX_COUNT; count++) {
// Setup Pll1 DSP @ TARGET_FREQ
status = Init_PLL(PLL1_M, PLL1_D);
if (status == -1) {
GEL_TextOut( "Error in Setting up main PLL, please power cycle the board and re-run Global Default Setup...\n" );
while (1);
}
if (!count) {
// Setup all Power Domains on
Set_Psc_All_On( );
}
// Setup Pll3 pass clk @ 1050 MHz
Init_Pll3(PLLM_PASS, PLLD_PASS);
// Setup Pll2 DDR3 PLL @ 667 MHz
Init_Pll2(PLLM_DDR, PLLD_DDR);
GEL_TextOut( "DDR begin (1333 auto)\n");
xmc_setup();
ddr3_setup_auto_lvl_1333(0);
GEL_TextOut( "DDR done\n");
if(ddr3_memory_test() == 0) {
break;
}
}
if (count == PLL_REINIT_MAX_COUNT) {
GEL_TextOut( "PLL and DDR Initialization failed ...\n");
} else {
GEL_TextOut( "PLL and DDR Initialization completed(%d) ...\n",,,,, count);
}
// Configure SGMII SERDES
configSGMIISerdes();
GEL_TextOut( "Enabling EDC ...\n");
EnableEDC_OneforAll();
GEL_TextOut( "Enabling EDC ...Done \n");
GEL_TextOut( "Configuring CPSW ...\n");
setCpSwConfig();
GEL_TextOut( "Configuring CPSW ...Done \n");
}
想确认:
上面的实现是因为方便调试才选定core0来进行部分初始化配置,还是芯片内部设计限定只能由core0来完成这些芯片模块与外设的初始化配置?