- #include <stdio.h>
- #include "NuMicro.h"
- #define SPI_CLK_FREQ 2500000
- #define LED_NUMBER 10
- void SYS_Init(void);
- void SPI_Init(void);
- unsigned int data_bit8_to_bit24(uint8_t data);
- void send_led_commands(uint8_t Led_number, uint8_t G,uint8_t R,uint8_t B);
- void send_array_clear(void){
- uint8_t led_counter=0;
- for(led_counter=0;led_counter<=LED_NUMBER;led_counter++){
- SPI_WRITE_TX(SPI0,0x924924);
- SPI_WRITE_TX(SPI0, 0x924924);
- SPI_WRITE_TX(SPI0, 0x924924);
- while(SPI_IS_BUSY(SPI0));
- }
- CLK_SysTickDelay(200);
- }
- void send_led_commands(uint8_t Led_number, uint8_t G,uint8_t R,uint8_t B){
- uint8_t led_counter=0;
- uint32_t dataG,dataR,dataB=0;
- dataG=data_bit8_to_bit24(G); //Transform 8bit green data to 24bit data
- dataR=data_bit8_to_bit24(R); //Transform 8bit red data to 24bit data
- dataB=data_bit8_to_bit24(B); //Transform 8bit blue data to 24bit data
- for(led_counter=0;led_counter<Led_number;led_counter++){
- SPI_WRITE_TX(SPI0,0x924924); //Send 0 bit turn off green color
- SPI_WRITE_TX(SPI0, 0x924924); //Send 0 bit turn off red color
- SPI_WRITE_TX(SPI0, 0x924924); //Send 0 bit turn off blue color
- while(SPI_IS_BUSY(SPI0)); // wait for communication
- }
- SPI_WRITE_TX(SPI0, dataG); // Send green color code
- SPI_WRITE_TX(SPI0, dataR); // Send red color code
- SPI_WRITE_TX(SPI0, dataB); // Send blue color code
- while(SPI_IS_BUSY(SPI0)); // wait for communication
- CLK_SysTickDelay(200); //wait for 200us for reset code
- }
- unsigned int data_bit8_to_bit24(uint8_t data){
- uint32_t conv_data=0;
- int8_t x=0;
- uint32_t bit0=4; //100
- uint32_t bit1=6; //110
- for(x=7;x>=0;x--){
- if (data&(1<<x))
- conv_data=conv_data|(bit1<<(3*x));
- else
- conv_data=conv_data|(bit0<<(3*x));
- }
- return conv_data;
- }
- int8_t counter=0;
- int main(void)
- {
- /* Unlock protected registers */
- SYS_UnlockReg();
- /* Init System, IP clock and multi-function I/O. */
- SYS_Init();
- /* Lock protected registers */
- SYS_LockReg();
- /* Init SPI */
- SPI_Init();
- send_array_clear();
- while(1){
- for(counter=LED_NUMBER-1;counter>=0;counter--){
- send_led_commands(counter,255-counter*28,counter*28,0);
- CLK_SysTickDelay(100000); //wait 100 miliseconds
- }
- CLK_SysTickDelay(1000000); //wait 3 seconds
- CLK_SysTickDelay(1000000);
- CLK_SysTickDelay(1000000);
- send_array_clear(); //Turn off all LEDs on strip
- CLK_SysTickDelay(1000000); //wait 1 second
- }
- }
- void SYS_Init(void)
- {
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init System Clock */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Enable HIRC clock */
- CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN_Msk);
- CLK_SetSysTickClockSrc(CLK_CLKSEL0_STCLKSEL_HIRC_DIV2);
- /* Waiting for HIRC clock ready */
- CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);
- /* Switch HCLK clock source to HIRC and HCLK source divide 1 */
- CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HIRC, CLK_CLKDIV0_HCLK(1));
- /* Select HIRC as the clock source of UART0 */
- CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UART0SEL_HIRC, CLK_CLKDIV0_UART0(1));
- /* Select PCLK1 as the clock source of SPI0 */
- CLK_SetModuleClock(SPI0_MODULE, CLK_CLKSEL2_SPI0SEL_PCLK1, MODULE_NoMsk);
- /* Enable SPI0 peripheral clock */
- CLK_EnableModuleClock(SPI0_MODULE);
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init I/O Multi-function */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Set PB multi-function pins for UART0 RXD=PB.12 and TXD=PB.13 */
- SYS->GPB_MFPH = (SYS->GPB_MFPH & ~(SYS_GPB_MFPH_PB12MFP_Msk | SYS_GPB_MFPH_PB13MFP_Msk)) |
- (SYS_GPB_MFPH_PB12MFP_UART0_RXD | SYS_GPB_MFPH_PB13MFP_UART0_TXD);
- /* Setup SPI0 multi-function pins */
- /* PA.3 is SPI0_SS, PA.2 is SPI0_CLK,
- PA.1 is SPI0_MISO, PA.0 is SPI0_MOSI*/
- SYS->GPA_MFPL = (SYS->GPA_MFPL & ~(SYS_GPA_MFPL_PA3MFP_Msk |
- SYS_GPA_MFPL_PA2MFP_Msk |
- SYS_GPA_MFPL_PA1MFP_Msk |
- SYS_GPA_MFPL_PA0MFP_Msk)) |
- (SYS_GPA_MFPL_PA3MFP_SPI0_SS |
- SYS_GPA_MFPL_PA2MFP_SPI0_CLK |
- SYS_GPA_MFPL_PA1MFP_SPI0_MISO |
- SYS_GPA_MFPL_PA0MFP_SPI0_MOSI);
- /* Update System Core Clock */
- /* User can use SystemCoreClockUpdate() to calculate SystemCoreClock and CyclesPerUs automatically. */
- SystemCoreClockUpdate();
- }
- void SPI_Init(void)
- {
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init SPI */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Configure as a master, clock idle low, 24-bit transaction, drive output on falling clock edge and latch input on rising edge. */
- /* Set IP clock divider. SPI clock rate = 2.5MHz */
- SPI_Open(SPI0, SPI_MASTER, SPI_MODE_0,24, SPI_CLK_FREQ);
- /* Enable the automatic hardware slave select function. Select the SS pin and configure as low-active. */
- SPI_EnableAutoSS(SPI0, SPI_SS, SPI_SS_ACTIVE_LOW);
- }
| 
楼主
