71 lines
2.4 KiB
C
71 lines
2.4 KiB
C
/*******************************************************************************
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* @note Copyright (C) 2017 Shanghai Panchip Microelectronics Co., Ltd.
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* All rights reserved.
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*
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* @file drv_spi.c
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* @brief SPI?y?ˉ
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*
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* @history - V1.0, 2017-03-06, xiaoguolin, first implementation.
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*******************************************************************************/
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#include "lib_driver_rfspi_pan159.h"
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/*******************************************************************************
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* @brief SPI初始化
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* @param[in] 无
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* @param[out] 无
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* @return 无
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******************************************************************************/
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void rfspi_pan159_init(void)
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{
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SYS->P0_MFP |= SYS_MFP_P01_GPIO; // P01->RF_CSN
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SYS->P0_MFP |= SYS_MFP_P07_SPI0_CLK|SYS_MFP_P05_SPI0_MOSI|SYS_MFP_P06_SPI0_MISO ;
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SYS->P5_MFP |= SYS_MFP_P52_GPIO; //P20->RF_IRQ
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CLK_EnableModuleClock(SPI0_MODULE);//使能SPI时钟
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CLK_SetModuleClock(SPI0_MODULE,CLK_CLKSEL1_SPISEL_HCLK,1);//时钟1分频
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GPIO_SetMode(P0, BIT1, GPIO_MODE_OUTPUT); //RF_CSN
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GPIO_SetMode(P5, BIT2, GPIO_MODE_INPUT); //RF_IRQ
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SYS->P0_MFP |= SYS_MFP_P05_SPI0_MOSI | SYS_MFP_P06_SPI0_MISO | SYS_MFP_P07_SPI0_CLK;//设置IO复用功能
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SPI_Open(SPI0, SPI_MASTER, SPI_MODE_0,8,2000000);//主设备，模式0,8位宽度，2M速率
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SPI_DisableAutoSS(SPI0);//禁止硬件SS脚
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SPI_WRITE_TX(SPI0, 0);//清除SPI数据
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}
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/*******************************************************************************
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* @brief SPI字节读写
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* @param[in] dat - 待写入数据
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* @param[out] 无
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* @return 读取到的字节
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******************************************************************************/
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uint8_t rfspi_pan159_rwc(uint8_t dat)
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{
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SPI_WRITE_TX(SPI0, dat);
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SPI_TRIGGER(SPI0);
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while(SPI_IS_BUSY(SPI0));
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return SPI0->RX;
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}
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/*******************************************************************************
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* @brief SPI读写数据块
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* @param[in] p_dat - 数据指针
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* len - 数据长度
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* @param[out] 无
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* @return 读取到的数据块，与p_dat共缓冲区
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* @history - V1.0, 2017-03-06, xiaoguolin, first implementation.
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******************************************************************************/
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uint8_t* rfspi_pan159_rws(uint8_t* p_dat, uint16_t len)
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{
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uint8_t i = 0;
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while(i < len)
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{
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SPI_WRITE_TX(SPI0, p_dat[i]);
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SPI_TRIGGER(SPI0);
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while(SPI_IS_BUSY(SPI0));
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p_dat[i] = SPI0->RX;
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i++;
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}
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return p_dat;
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}
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