Altera MAXII CPLD EPM1270GF silicon ID Error的解决办法
设计中用到了Altera MAXII EPM1270GF CPLD,原以为每个Bank的IO电压可以单独上电，后发现Bank IO voltage缺失时下载编程出现以下错误： Error: Can't recognize silicon ID for device 1 Error: Operation failed 把缺失的Bank IO voltage补上，一切OK
此博客中的热门博文
STM32F072的I2C的使用方法
按官方提供的stm32f0xx_i2c.c中的说明部分做完初始化... ============================================================================ ##### How to use this driver ##### ============================================================================ [..] (#) Enable peripheral clock using RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2Cx, ENABLE) function for I2C1 or I2C2. (#) Enable SDA, SCL and SMBA (when used) GPIO clocks using RCC_AHBPeriphClockCmd() function. (#) Peripherals alternate function: (++) Connect the pin to the desired peripherals' Alternate Function (AF) using GPIO_PinAFConfig() function. (++) Configure the desired pin in alternate function by: GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AF (++) Select the type, OpenDrain and speed via GPIO_PuPd, GPIO_OType and GPIO_Speed members (++) Call GPIO_Init() function. (#) Program the Mode, Timing , O
OMAP3 Mobile DDR 初始化
SDR和DDR SDRAM在使用前都需要进行初始化操作，设计中使用的是TI的OMAP3530和Micron的32bitMobileDDR MT46H16M32LF 注意将OMAP3的SDRC_MCFG设置为0x02482019，行地址13bit，列地址9bit，RAMSIZE=32. 至于Burst操作，需要进一步的Timing配置。 /********************************************************************* * config_3430sdram_ddr() - Init DDR on 3430SDP dev board. *********************************************************************/ void config_3430sdram_ddr(void) { /* reset sdrc controller */ __raw_writel(SOFTRESET, SDRC_SYSCONFIG); wait_on_value(BIT0, BIT0, SDRC_STATUS, 12000000); __raw_writel(0, SDRC_SYSCONFIG); /* setup sdrc to ball mux */ __raw_writel(SDP_SDRC_SHARING, SDRC_SHARING); /* set mdcfg */ __raw_writel(SDP_SDRC_MDCFG_0_DDR, SDRC_MCFG_0); //这里MCFG的值设置为0x02482019 /* set timing */ #if 0 if ((get_mem_type() == GPMC_ONENAND) || (get_mem_type() == MMC_ONENAND)) { __raw_writel(INFINEON_SDRC_ACTIM_CTRLA_0, SDRC_ACTIM_CTRLA_0); __raw_writel(INFINEON_SDRC_ACTIM_CTRLB_0, SDRC_ACTIM_CTRLB_0); } if ((get_mem_t
评论