SWRA845 June   2026 CC2340R5 , CC2744R7-Q1 , CC2745P10-Q1 , CC2745R10-Q1 , CC2745R7-Q1

 

  1.   1
  2.   Abstract
  3. 1Links to Hardware and Software Design References
    1. 1.1 Data Sheet and User Guide
    2. 1.2 Required and Recommended Software for Environment Setup
    3. 1.3 SDK Examples
    4. 1.4 Hardware Design References
    5. 1.5 Power Calculator Table
    6. 1.6 Links to Product QDID Certificates
    7. 1.7 HSM (CC2745) Certification
  4. 2CCS 20.0-Based Debugging Methods
    1. 2.1 How to Map a Project File to the Customer's Own Board
    2. 2.2 Evaluating RAM Consumption and Checking for Stack Overflow With Map File and ROV
    3. 2.3 How to Port Your Project in CCS 12.x to CCS 20.x for Debugging
    4. 2.4 Performing Chip Erase on the CC2745
    5. 2.5 How to Debug a Project (.out) Directly in CCS 20.x Without Importing Project Code
    6. 2.6 How to Verify Whether the Chip's RF Is Working Properly
  5. 3FAQs for Development Using CC2340 and CC2745
    1. 3.1  Why Does the Program Fail to Run Correctly Although It Has Been Successfully Flashed via UniFlash or CCS
    2. 3.2  How to Change the Tx Power for Bluetooth Devices
    3. 3.3  Why Does My Program Enter iCall_abort
    4. 3.4  How to Debug a Project with MCUboot
    5. 3.5  How to Adjust the Flash Location and Size of the App in an OAD Application
    6. 3.6  How to Customize a Section in .cmd and Use it in Code
    7. 3.7  How to Use the Non-initialized Variable Section
    8. 3.8  How to Simultaneously Send Two ADV Sets With Public and RPA Addresses
    9. 3.9  What is the Difference Between E0 and E1 on the CC2745R10 Chip
    10. 3.10 How to Enable More DMA Channels to Support My Driver Requirements

3.10 How to Enable More DMA Channels to Support My Driver Requirements

Engineers may require more DMA channels in some cases, such as enabling both SPI0/1 and UART0/1 for the purpose of

simultaneous data transmission on four serial ports. The 12 DMA channels defined for the CC2745 are described in section 19.3.1 of the CC27xx Technical Reference Manual (Rev. A).

If engineers want to adjust the DMA channel for a driver or add a new channel, they can modify it in the project's SysConfig, using SPI0 as an example:

As shown in the table, SPI can be configured to use DMA_CH0/1 or DMA_CH6/7, which aligns with the actual configuration in SysConfig. Engineers who want to use DMA_CH8-11 should note that CH8-11 are the Event Publisher Channels and can only be used if there is an external publisher. They cannot be arbitrarily configured to be used with drivers for SPI or UART.