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#include "SWM221.h"
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uint16_t *SPI_TXBuff = 0;
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uint32_t SPI_TXCount = 0;
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uint32_t SPI_TXIndex = 0;
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void SerialInit(void);
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void SPIMstInit(void);
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void SPIMstSend(uint16_t buff[], uint32_t cnt);
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int main(void)
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{
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uint16_t buff[16] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF};
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SystemInit();
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SerialInit();
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SPIMstInit();
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GPIO_Init(GPIOA, PIN5, 1, 0, 0, 0); //用作中断进入指示信号
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while(1==1)
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{
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SPIMstSend(buff, 16);
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for(int i = 0; i < SystemCoreClock/10; i++) __NOP();
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}
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}
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void SPIMstInit(void)
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{
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SPI_InitStructure SPI_initStruct;
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GPIO_Init(GPIOB, PIN15, 1, 0, 0, 0); //软件控制片选
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#define SPI_CS_Low() GPIO_ClrBit(GPIOB, PIN15)
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#define SPI_CS_High() GPIO_SetBit(GPIOB, PIN15)
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SPI_CS_High();
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PORT_Init(PORTB, PIN10, PORTB_PIN10_SPI0_SCLK, 0);
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PORT_Init(PORTB, PIN13, PORTB_PIN13_SPI0_MOSI, 0);
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PORT_Init(PORTB, PIN14, PORTB_PIN14_SPI0_MISO, 1);
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SPI_initStruct.clkDiv = SPI_CLKDIV_32;
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SPI_initStruct.FrameFormat = SPI_FORMAT_SPI;
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SPI_initStruct.SampleEdge = SPI_SECOND_EDGE;
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SPI_initStruct.IdleLevel = SPI_HIGH_LEVEL;
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SPI_initStruct.WordSize = 8;
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SPI_initStruct.Master = 1;
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SPI_initStruct.RXThreshold = 0;
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SPI_initStruct.RXThresholdIEn = 0;
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SPI_initStruct.TXThreshold = 4; // 当发送FIFO中数据少于4个时产生中断
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SPI_initStruct.TXThresholdIEn = 0;
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SPI_initStruct.TXCompleteIEn = 0;
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SPI_Init(SPI0, &SPI_initStruct);
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NVIC_EnableIRQ(GPIOB3_GPIOA11_SPI0_IRQn);
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SPI_Open(SPI0);
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}
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void SPIMstSend(uint16_t buff[], uint32_t cnt)
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{
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SPI_TXBuff = buff;
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SPI_TXCount = cnt;
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SPI_TXIndex = 0;
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SPI_CS_Low();
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SPI_INTEn(SPI0, SPI_IT_TX_DONE);
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SPI_INTEn(SPI0, SPI_IT_TX_THRES);
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}
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void GPIOB3_GPIOA11_SPI0_Handler(void)
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{
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if(SPI_INTStat(SPI0, SPI_IT_TX_THRES))
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{
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while((SPI_IsTXFull(SPI0) == 0) && (SPI_TXIndex < SPI_TXCount))
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{
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SPI_Write(SPI0, SPI_TXBuff[SPI_TXIndex++]);
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}
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if(SPI_TXIndex == SPI_TXCount)
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{
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SPI_INTDis(SPI0, SPI_IT_TX_THRES);
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}
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SPI_INTClr(SPI0, SPI_IT_TX_THRES); //清除中断标志，必须在填充TX FIFO后清中断标志
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}
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if(SPI_INTStat(SPI0, SPI_IT_TX_DONE))
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{
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SPI_INTClr(SPI0, SPI_IT_TX_DONE);
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if(SPI_TXIndex == SPI_TXCount) // 要发送的数据已全部填入SPI TX FIFO
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{
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SPI_CS_High();
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SPI_INTDis(SPI0, SPI_IT_TX_DONE);
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}
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}
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GPIO_InvBit(GPIOA, PIN5);
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}
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void SerialInit(void)
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{
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UART_InitStructure UART_initStruct;
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PORT_Init(PORTA, PIN0, PORTA_PIN0_UART0_RX, 1); //GPIOA.0配置为UART0 RXD
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PORT_Init(PORTA, PIN1, PORTA_PIN1_UART0_TX, 0); //GPIOA.1配置为UART0 TXD
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UART_initStruct.Baudrate = 57600;
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UART_initStruct.DataBits = UART_DATA_8BIT;
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UART_initStruct.Parity = UART_PARITY_NONE;
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UART_initStruct.StopBits = UART_STOP_1BIT;
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UART_initStruct.RXThreshold = 3;
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UART_initStruct.RXThresholdIEn = 0;
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UART_initStruct.TXThreshold = 3;
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UART_initStruct.TXThresholdIEn = 0;
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UART_initStruct.TimeoutTime = 10;
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UART_initStruct.TimeoutIEn = 0;
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UART_Init(UART0, &UART_initStruct);
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UART_Open(UART0);
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}
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/******************************************************************************************************************************************
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* 函数名称: fputc()
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* 功能说明: printf()使用此函数完成实际的串口打印动作
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* 输 入: int ch 要打印的字符
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* FILE *f 文件句柄
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* 输 出: 无
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* 注意事项: 无
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******************************************************************************************************************************************/
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int fputc(int ch, FILE *f)
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{
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UART_WriteByte(UART0, ch);
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while(UART_IsTXBusy(UART0));
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return ch;
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}
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