User manual
Table Of Contents
- Zynq-7000 All Programmable SoC
- Table of Contents
- Ch. 1: Introduction
- Ch. 2: Signals, Interfaces, and Pins
- Ch. 3: Application Processing Unit
- Ch. 4: System Addresses
- Ch. 5: Interconnect
- Ch. 6: Boot and Configuration
- Ch. 7: Interrupts
- Ch. 8: Timers
- Ch. 9: DMA Controller
- Introduction
- Functional Description
- DMA Transfers on the AXI Interconnect
- AXI Transaction Considerations
- DMA Manager
- Multi-channel Data FIFO (MFIFO)
- Memory-to-Memory Transfers
- PL Peripheral AXI Transactions
- PL Peripheral Request Interface
- PL Peripheral - Length Managed by PL Peripheral
- PL Peripheral - Length Managed by DMAC
- Events and Interrupts
- Aborts
- Security
- IP Configuration Options
- Programming Guide for DMA Controller
- Programming Guide for DMA Engine
- Programming Restrictions
- System Functions
- I/O Interface
- Ch. 10: DDR Memory Controller
- Introduction
- AXI Memory Port Interface (DDRI)
- DDR Core and Transaction Scheduler (DDRC)
- DDRC Arbitration
- Controller PHY (DDRP)
- Initialization and Calibration
- DDR Clock Initialization
- DDR IOB Impedance Calibration
- DDR IOB Configuration
- DDR Controller Register Programming
- DRAM Reset and Initialization
- DRAM Input Impedance (ODT) Calibration
- DRAM Output Impedance (RON) Calibration
- DRAM Training
- Write Data Eye Adjustment
- Alternatives to Automatic DRAM Training
- DRAM Write Latency Restriction
- Register Overview
- Error Correction Code (ECC)
- Programming Model
- Ch. 11: Static Memory Controller
- Ch. 12: Quad-SPI Flash Controller
- Ch. 13: SD/SDIO Controller
- Ch. 14: General Purpose I/O (GPIO)
- Ch. 15: USB Host, Device, and OTG Controller
- Introduction
- Functional Description
- Programming Overview and Reference
- Device Mode Control
- Device Endpoint Data Structures
- Device Endpoint Packet Operational Model
- Device Endpoint Descriptor Reference
- Programming Guide for Device Controller
- Programming Guide for Device Endpoint Data Structures
- Host Mode Data Structures
- EHCI Implementation
- Host Data Structures Reference
- Programming Guide for Host Controller
- OTG Description and Reference
- System Functions
- I/O Interfaces
- Ch. 16: Gigabit Ethernet Controller
- Ch. 17: SPI Controller
- Ch. 18: CAN Controller
- Ch. 19: UART Controller
- Ch. 20: I2C Controller
- Ch. 21: Programmable Logic Description
- Ch. 22: Programmable Logic Design Guide
- Ch. 23: Programmable Logic Test and Debug
- Ch. 24: Power Management
- Ch. 25: Clocks
- Ch. 26: Reset System
- Ch. 27: JTAG and DAP Subsystem
- Ch. 28: System Test and Debug
- Ch. 29: On-Chip Memory (OCM)
- Ch. 30: XADC Interface
- Ch. 31: PCI Express
- Ch. 32: Device Secure Boot
- Appx. A: Additional Resources
- Appx. B: Register Details
- Overview
- Acronyms
- Module Summary
- AXI_HP Interface (AFI) (axi_hp)
- CAN Controller (can)
- DDR Memory Controller (ddrc)
- CoreSight Cross Trigger Interface (cti)
- Performance Monitor Unit (cortexa9_pmu)
- CoreSight Program Trace Macrocell (ptm)
- Debug Access Port (dap)
- CoreSight Embedded Trace Buffer (etb)
- PL Fabric Trace Monitor (ftm)
- CoreSight Trace Funnel (funnel)
- CoreSight Intstrumentation Trace Macrocell (itm)
- CoreSight Trace Packet Output (tpiu)
- Device Configuration Interface (devcfg)
- DMA Controller (dmac)
- Gigabit Ethernet Controller (GEM)
- General Purpose I/O (gpio)
- Interconnect QoS (qos301)
- NIC301 Address Region Control (nic301_addr_region_ctrl_registers)
- I2C Controller (IIC)
- L2 Cache (L2Cpl310)
- Application Processing Unit (mpcore)
- On-Chip Memory (ocm)
- Quad-SPI Flash Controller (qspi)
- SD Controller (sdio)
- System Level Control Registers (slcr)
- Static Memory Controller (pl353)
- SPI Controller (SPI)
- System Watchdog Timer (swdt)
- Triple Timer Counter (ttc)
- UART Controller (UART)
- USB Controller (usb)
Zynq-7000 AP SoC Technical Reference Manual www.xilinx.com 546
UG585 (v1.11) September 27, 2016
Chapter 17: SPI Controller
a. Read data from the spi.Rx_Data_reg register. Continue to receive bytes using the data byte
counter.
6. Fill the TxFIFO: More data can be written to the TxFIFO, if needed:
a. Write data to the spi.Tx_Data_reg0 register.
b. Continue to fill data until FIFO depth is reached or there is no further data.
c. Increment the data byte counter after each byte is pushed.
7. Check for overflow or underflow: Read the [TX_FIFO_underflow] or [RX_OVERFLOW] status
bits. Handle the overflow and underflow conditions accordingly.
8. Enable the interrupts: If more data need to be transmitted or received, set spi.Intrpt_en_reg0
[TX_FIFO_not_full] and [RX_FIFO_full] both = 1.
9. If there is data to be transferred (Sent/Received), then start the data transfer:
°
When in master mode, and data transfer is done using manual start (for both manual/auto
SS), set spi.Config_reg [Man_start_en] = 1.
17.3.6 Register Overview
The SPI registers are detailed Appendix B, Register Details. The register overview is provided in
Table 17-2.
17.4 System Functions
• 17.4.1 Resets
• 17.4.2 Clocks
Table 17-2: SPI Register Overview
Type Register Name Description
Controller
Configuration
Config_reg0 Configuration
Controller enable En_reg0 SPI controller enable
Interrupt
Intr_status_reg0 Interrupt status (Rx full, not empty and Tx full, not full)
Intrpt_en_reg0 Interrupt enable
Intrpt_dis_reg0 Interrupt disable
Intrpt_mask_reg0 Interrupt mask/enable
FIFO thresholds
TX_thres_reg0 TxFIFO threshold level for not full
RX_thres_reg0 RxFIFO Threshold level for not empty
Master mode Delay_reg0 SS delays and separation counts in master mode
FIFO data ports
Tx_data_reg0 Transmit data (TxFIFO)
Rx_data_reg0 Receive data (RxFIFO)
Slave mode Slave_Idle_count_reg0 Slave idle count detects inactive SCLK