DSP入門小案例

1、DSP入門簡析1如何編寫一個簡單的DSP程序環(huán)境設(shè)置好變量先聲明初始五步走認清寄存器2環(huán)境設(shè)置好選擇合適的CCS版本選擇合適的仿真器驅(qū)動對例程進行導(dǎo)入，并進行基本設(shè)置注意cmd文件與lib文件3變量先聲明利用完整的頭文件一般包括兩部分：Device.h和自己寫的h文件利用宏定義利用全局變量聲明、外部函數(shù)聲明貌似不聲明不報錯，只有warning4初始五步走初始化系統(tǒng)設(shè)置InitSysCtrl()；初始化IO口設(shè)置InitGpio()；關(guān)閉中斷，清中斷位DINT；IER = 0 x0000;IFR = 0 x0000;初始化PIE設(shè)置InitPieCitrl();InitPieVectTable(

2、);初始化其他外部設(shè)備InitPeripherals();5認清寄存器了解常用寄存器結(jié)構(gòu)GpioCtrlRegs GpioDataRegs GpioIntRegs了解常用語法GpioCtrlRegs.GPAMUX1.all = 0 x00000000; 6例程1#include DSP28x_Project.h / Device Header Examples Include File/ Select the example to compile in. Only one example should be set as 1/ the rest should be set as 0.#defi

3、ne EXAMPLE1 0 / Use DATA registers to toggle I/Os#define EXAMPLE2 0 / Use SET/CLEAR registers to toggle I/Os#define EXAMPLE3 1 / Use TOGGLE registers to toggle I/Os/ Prototype statements for functions found within this file.void delay_loop(void);void Gpio_select(void);void Gpio_example1(void);void G

4、pio_example2(void);void Gpio_example3(void);7void main(void)/ Step 1. Initialize System Control: InitSysCtrl(); / Step 2. Initalize GPIO: / InitGpio(); / Skipped for this example/ For this example use the following configuration: Gpio_select(); / Step 3. Clear all interrupts and initialize PIE vecto

5、r table:/ Disable CPU interrupts DINT;8/ Initialize PIE control registers to their default state. InitPieCtrl();/ Disable CPU interrupts and clear all CPU interrupt flags: IER = 0 x0000; IFR = 0 x0000;/ Initialize the PIE vector table with pointers to the shell Interrupt / Service Routines (ISR). In

6、itPieVectTable();9/ Step 4. Initialize all the Device Peripherals:/ InitPeripherals(); / Not required for this example#if EXAMPLE1 / This example uses DATA registers to toggle I/Os Gpio_example1();#endif / - EXAMPLE1#if EXAMPLE2 / This example uses SET/CLEAR registers to toggle I/Os Gpio_example2();

7、#endif#if EXAMPLE3 / This example uses TOGGLE registers to toggle I/Os Gpio_example3();#endif10void Gpio_select(void) EALLOW; GpioCtrlRegs.GPAMUX1.all = 0 x00000000; / All GPIO GpioCtrlRegs.GPAMUX2.all = 0 x00000000; / All GPIO GpioCtrlRegs.GPBMUX1.all = 0 x00000000; / All GPIO GpioCtrlRegs.GPADIR.a

8、ll = 0 xFFFFFFFF; / All outputs GpioCtrlRegs.GPBDIR.all = 0 x0000000F; / All outputs EDIS; 11void Gpio_example1(void) / Example 1: / Toggle I/Os using DATA registers for(;) GpioDataRegs.GPADAT.all =0 xAAAAAAAA; GpioDataRegs.GPBDAT.all =0 x0000000A; delay_loop(); GpioDataRegs.GPADAT.all =0 x55555555;

9、 GpioDataRegs.GPBDAT.all =0 x00000005; delay_loop(); 12void Gpio_example2(void) / Example 2: / Toggle I/Os using SET/CLEAR registers for(;) GpioDataRegs.GPASET.all =0 xAAAAAAAA; GpioDataRegs.GPACLEAR.all =0 x55555555; GpioDataRegs.GPBSET.all =0 x0000000A; GpioDataRegs.GPBCLEAR.all =0 x00000005; dela

10、y_loop(); GpioDataRegs.GPACLEAR.all =0 xAAAAAAAA; GpioDataRegs.GPASET.all =0 x55555555; GpioDataRegs.GPBCLEAR.all =0 x0000000A; GpioDataRegs.GPBSET.all =0 x00000005; delay_loop(); 13void Gpio_example3(void) / Example 2: / Toggle I/Os using TOGGLE registers / Set pins to a known state GpioDataRegs.GPASET.all =0 xAAAAAAAA; GpioDataRegs.GPACLEAR.all =0 x55555555; GpioDataRegs.GPBSET.all =0 x0000000A; GpioDataRegs.GPBCLEAR.all =0 x00000005; / Use TOGGLE registers to flip the state of the pins. / Any bit set to a 1 will flip state (toggle) / Any bit set to a 0 will not toggl