Table of Contents 1 Introduction 4 1.1 Overview 4 1.2 Address map 4 1.2.1 Diagrammatic overview 4 1.2.2 ARM virtual addresses (standard Linux kernel only) 6 1.2.3 ARM physical addresses 6 1.2.4 Bus addresses 6 1.3 Peripheral access precautions for correct memory ordering 7 2 Auxiliaries: UART1 & SPI1, SPI2 8 2.1 Overview 8 2.1.1 AUX registers 9 2.2 Mini UART 10 2.2.1 Mini UART implementation details. 11 2.2.2 Mini UART register details. 11 2.3 Universal SPI Master (2x) 20 2.3.1 SPI implementation details 20 2.3.2 Interrupts 21 2.3.3 Long bit streams 21 2.3.4 SPI register details. 22 3 BSC 28 3.1 Introduction 28 3.2 Register View 28 3.3 10 Bit Addressing 36 4 DMA Controller 38 4.1 Overview 38 4.2 DMA Controller Registers 39 4.2.1 DMA Channel Register Address Map 40 4.3 AXI Bursts 63 4.4 Error Handling 63 4.5 DMA LITE Engines 63 5 External Mass Media Controller 65 o Introduction 65 o Registers 66 6 General Purpose I/O (GPIO) 89 6.1 Register View 90 6.2 Alternative Function Assignments 102 6.3 General Purpose GPIO Clocks 105 7 Interrupts 109 7.1 Introduction 109 7.2 Interrupt pending. 110 7.3 Fast Interrupt (FIQ). 110 7.4 Interrupt priority. 110 7.5 Registers 112 8 PCM / I2S Audio 119 8.1 Block Diagram 120 8.2 Typical Timing 120 8.3 Operation 121 8.4 Software Operation 122 8.4.1 Operating in Polled mode 122 8.4.2 Operating in Interrupt mode 123 8.4.3 DMA 123 8.5 Error Handling. 123 8.6 PDM Input Mode Operation 124 8.7 GRAY Code Input Mode Operation 124 8.8 PCM Register Map 125 9 Pulse Width Modulator 138 9.1 Overview 138 9.2 Block Diagram 138 9.3 PWM Implementation 139 9.4 Modes of Operation 139 9.5 Quick Reference 140 9.6 Control and Status Registers 141 10 SPI 148 10.1 Introduction 148 10.2 SPI Master Mode 148 10.2.1 Standard mode 148 10.2.2 Bidirectional mode 149 10.3 LoSSI mode 150 10.3.1 Command write 150 10.3.2 Parameter write 150 10.3.3 Byte read commands 151 10.3.4 24bit read command 151 10.3.5 32bit read command 151 10.4 Block Diagram 152 10.5 SPI Register Map 152 10.6 Software Operation 158 10.6.1 Polled 158 10.6.2 Interrupt 158 10.6.3 DMA 158 10.6.4 Notes 159 11 SPI/BSC SLAVE 160 11.1 Introduction 160 11.2 Registers 160 12 System Timer 172 12.1 System Timer Registers 172 13 UART 175 13.1 Variations from the 16C650 UART 175 13.2 Primary UART Inputs and Outputs 176 13.3 UART Interrupts 176 13.4 Register View 177 14 Timer (ARM side) 196 14.1 Introduction 196 14.2 Timer Registers: 196 15 USB 200 15.1 Configuration 200 15.2 Extra / Adapted registers. 202

适用于树莓派裸机开发,毕业论文引用等

前段时间项目用到can总线，用的是树莓派，于是写了一个mcp2515的驱动。不知道为啥wiringPi集成的spi函数不能实现，于是就用了bcm2835的spi函数，实测波形稳定，效果不错。

关于树莓派zero w 的芯片BCM2835的数据手册资料

其中xx代表的是下载的版本号，例如我下载的文件是bcm2835-1.63，进入BCM2835的官网下载并把安装包复制到树莓派上，可在官网下载，这里是方便博客查找对应库。

As is standard practice, the standard BCM2835 Linux kernel provides a contiguous mapping over the whole of available RAM at the top of memory. The kernel is configured for a 1GB/3GB split between kernel and user-space memory.

里面是bcm2835库手册中文版，树莓派适用于树莓派3与4。初步翻译有些地方需要对比一下英文原版。 官方网站：https://www.airspayce.com/mikem/bcm2835/。

BCM2835-ARM资料，英国开发的单板计算机的处理器资料

树莓派的数据手册 ,BCM2835,cpu,arm

树莓派3b上完成基于MCP2515和BCM2835的SPI转CAN，实现树莓派与外界的CAN通信。代码可以直接调用CAN_Send_Buffer(unsigned char *CAN_TX_Buf,unsigned char len, unsigned char msgID)和CAN_Receive_Buffer(unsigned char *CAN_RX_Buf)来完成标准帧发和收。接收到的数据ID在接收数组的最后一位，使用时可以直接修改初始化函数和CAN收发函数。文件内还包含有makefile，在安装好相关驱动后，可以在文件夹下测试，直接在终端make，之后sudo ./hello。