文件列表:

CE116_SPI_loopback (0, 2007-09-12)
CE116_SPI_loopback\h (0, 2007-09-12)
CE116_SPI_loopback\h\spi1Drv.h (2893, 2007-09-11)
CE116_SPI_loopback\h\tglPin.h (2676, 2007-09-11)
CE116_SPI_loopback\SPI_loopback.mcp (1089, 2007-09-12)
CE116_SPI_loopback\SPI_loopback.mcw (60416, 2007-07-23)
CE116_SPI_loopback\src (0, 2007-09-12)
CE116_SPI_loopback\src\main.c (4350, 2007-09-12)
CE116_SPI_loopback\src\spi1Drv.c (6650, 2007-09-11)
CE116_SPI_loopback\src\tglPin.s (2849, 2007-09-11)
CE116_SPI_loopback\src\traps.c (5708, 2007-09-11)

Readme File for Code Example: CE116 - SPI Loop-back --------------------------------------------------- This file contains the following sections: 1. Code Example Description 2. Folder Contents 3. Suggested Development Resources 4. Reconfiguring the project for a different dsPIC33F device 5. Revision History 1. Code Example Description: ---------------------------- In this code examples, 2x16=32words is tranmitted using SPI and received back in ping-pong mode. This operation happens contineously. Note: SDI1/RF7 pin should be connected to SD01/RF8 externally. void cfgSpi1Master(void) This function configures SPI in master mode to transmit/receive 16-bit word. void initSPIBuff(void) This function pre-initialise the transmit data buffer and DMA RAM buffer for transmission void cfgDma0SpiTx(void) This function configures DMA channel 0 for SPI transmission. DMA is configured in ping-pong mode with auto increment addressing for DMA memory read. void cfgDma1SpiRx(void) This function configures DMA channel 0 for SPI reception. DMA is configured in ping-pong mode with auto increment addressing for DMA memory write. void __attribute__((__interrupt__)) _DMA0Interrupt(void) This interrupt routine handles transmit DMA interrupt void __attribute__((__interrupt__)) _DMA1Interrupt(void) This interrupt routine handles the receive ping-pong buffer. 2. Folder Contents: ------------------- This folder contains the following sub-folders: a. C:\Program Files\Microchip\MPLAB C30\support\gld This folder will have the device GLD file, it is used for building the project. This file was provided with the MPLAB C30 toolsuite. b. C:\Program Files\Microchip\MPLAB C30\support\h This folder contains C header files useful in building this project. Device register and bit definitions are provided in the *.h file that follows the device name. These files were provided with the MPLAB C30 toolsuite. c. C:\Program Files\Microchip\MPLAB C30\lib This folder contains library archive files, which are a collection of precompiled object files. The file named "libpic30-coff.a" contains the C run-time start-up library. These file were provided with the MPLAB C30 toolsuite. d. hex This folder contains three file types - coff, hex and map. These are files generated by the MPLAB C30 toolsuite on build operation performed within MPLAB IDE. The *.map file contains details on memory allocation for various variables, constants and dsPIC instructions specified in the source and library code. The *.hex file contains a binary file that may be programmed into the dsPIC device. The *.coff file contains a binary file that is used by MPLAB IDE for simulation. e. h This folder contains include files for the code example. f. src This folder contains all the C and Assembler source files (*.c, *.s) used in demonstrating the described example. This folder also contains a sub-folder named "obj" that stores compiled object files generated when the project is built. 3. Suggested Development Resources: ----------------------------------- a. dsPICDEM1.1+ board with dsPIC33FJ256GP710 controller 4. Reconfiguring the project for a different dsPIC33F device: ------------------------------------------------------------- The Project/Workspace can be easily reconfigured for any dsPIC33F device. Please use the following general guidelines: a. Change device selection within MPLAB IDE to a dsPIC33F device of your choice by using the following menu option: MPLAB IDE>>Configure>>Select Device b. Provide the correct device linker script and header file for your device. Device linker scripts and header files are available in your MPLAB C30 installation folder under: Device Linker Script- YourDrive:>Program Files\Microchip\MPLAB C30\support\gld Device C Header file- YourDrive:>Program Files\Microchip\MPLAB C30\support\h Device ASM Include file- YourDrive:>Program Files\Microchip\MPLAB C30\support\inc c. Provide the appropriate path to your MPLAB C30 support file locations using the menu option: MPLAB IDE>>Project>>Build Options>>Project d. Chose the development board applicable to your device. Some options are provided below: e. Re-build the MPLAB project using the menu option: MPLAB IDE>>Project>>Build All f. Download the hex file into the device and run. 5. Revision History : --------------------- 04/01/2006 - Initial Release of the Code Example

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