4.2 概述 ............................................................................................................................................... 45
4.3 系统内存映射 ................................................................................................................................ 46
4.4 IAP ................................................................................................................................................ 46
4.5 系统初始化 .................................................................................................................................... 47
4.5.1 时钟输出功能 .................................................................................................................................... 48
4.5.2 HIRC Trim功能 ................................................................................................................................. 49
4.5.3 复位 .................................................................................................................................................... 49
4.5.4 低压检测和复位 ................................................................................................................................ 50
4.6 UART初始化 ................................................................................................................................. 50
4.7 GPIO初始化 .................................................................................................................................. 52
4.8 Timer初始化 ................................................................................................................................. 57
4.9 ADC初始化 ................................................................................................................................... 58
4.10 I2C初始化 ..................................................................................................................................... 61
4.11 I2S初始化 ..................................................................................................................................... 69
4.12 LCD初始化 ................................................................................................................................... 72
4.13 PWM初始化 .................................................................................................................................. 74
4.14 RTC初始化 ................................................................................................................................... 76
4.14.1 NUC505 的RTC ...................................................................................................................... 76
4.14.2 RTC代码 .................................................................................................................................. 81
4.15 SPI初始化 ..................................................................................................................................... 82
4.16 ACMP初始化 ................................................................................................................................ 84
4.17 WDT初始化................................................................................................................................... 86
4.18 WWDT初始化 ............................................................................................................................... 88
4.19 FMC初始化 ................................................................................................................................... 89
4.20 PDMA初始化 ................................................................................................................................ 91
4.21 DAC初始化 ................................................................................................................................... 96
4.22 EBI初始化 ..................................................................................................................................... 97
4.23 密码IP初始化 .............................................................................................................................. 102
4.24 SC初始化 .................................................................................................................................... 104
4.25 PS2D初始化 ............................................................................................................................... 106
4.26 EMAC初始化 .............................................................................................................................. 108
5 中级篇 ..................................................................................................................................... 112
5.1 CAN ............................................................................................................................................ 112
5.1.1 CAN协议介绍 ..................................................................................................................................112
