SPI_Select_Slave(0x00); //Select SPI slave
于是将这段代码作为片选线的控制语句，手动拉高拉低。代码如下
uint8_t at86rf215_read_single( uint16_t addr ) {SPI_Select_Slave(0x01); if(~SPI_GetToeStatus() && SPI_GetTrdyStatus() == 1){SPI_WriteData( ( addr >> 8 ) & 0x3f );SPI_WriteData( ( addr & 0xff ) );}uint8_t data= SPI_ReadData();SPI_Select_Slave(0x00);
return data; }uint8_t at86rf215_write_single( uint16_t addr, uint8_t val ) {SPI_Select_Slave(0x01); if(~SPI_GetToeStatus() && SPI_GetTrdyStatus() == 1){SPI_WriteData( 0x80 | ( ( addr >> 8 ) & 0x3f ) );SPI_WriteData( ( addr & 0xff ) );SPI_WriteData( val );}SPI_Select_Slave(0x00);
return 0; }
官方库代码
/******************************************************************************************** @file gw1ns4c_spi.c* @author GowinSemiconductor* @device Gowin_EMPU(GW1NS-4C)* @brief This file contains all the functions prototypes for the SPI firmware library.*******************************************************************************************//* Includes ------------------------------------------------------------------*/ #include "gw1ns4c_spi.h"/** @addtogroup GW1NS4C_StdPeriph_Driver* @{*//** @defgroup SPI* @brief SPI driver modules* @{*//** @defgroup SPI_Private_TypesDefinitions* @{*//*** @}*//** @defgroup SPI_Private_Macros* @{*//*** @}*//** @defgroup SPI_Private_Variables* @{*//*** @}*//** @defgroup SPI_Private_FunctionPrototypes* @{*//*** @}*//** @defgroup SPI_Private_Functions* @{*//*** @param SPI_InitTypeDef Pointer* @return none* @brief Initializes SPI*/ void SPI_Init(SPI_InitTypeDef* SPI_InitStruct) {uint32_t new_ctrl = 0;SPI->CTRL = 0;SPI->STATUS = 0;/* Set Direction */if(SPI_InitStruct->DIRECTION == 1){new_ctrl |= SPI_CR_DIRECTION;}/*Set Phase*/if(SPI_InitStruct->PHASE == 1){new_ctrl |= SPI_CR_PHASE;}/*Set Polarity*/if(SPI_InitStruct->POLARITY == 1){new_ctrl |= SPI_CR_POLARITY;}/*Set ClkSel*/new_ctrl |= (SPI_InitStruct->CLKSEL << SPI_CR_CLKSEL_Pos);SPI->CTRL = new_ctrl; }/*** @param none* @return none* @brief Sets Direction*/ void SPI_SetDirection(void) {SPI->CTRL |= SPI_CR_DIRECTION; }/*** @param none* @return none* @brief Clears Direction*/ void SPI_ClrDirection(void) {SPI->CTRL &= ~SPI_CR_DIRECTION; }/*** @param none* @return uint32_t* @brief Returns Direction*/ uint32_t SPI_GetDirection(void) {return ((SPI->CTRL&SPI_CR_DIRECTION)==SPI_CR_DIRECTION); }/*** @param none* @return none* @brief Sets Phase*/ void SPI_SetPhase(void) {SPI->CTRL |= SPI_CR_PHASE; }/*** @param none* @return none* @brief Clears Phase*/ void SPI_ClrPhase(void) {SPI->CTRL &= ~SPI_CR_PHASE; }/*** @param none* @return uint32_t* @brief Returns Phase*/ uint32_t SPI_GetPhase(void) {return ((SPI->CTRL&SPI_CR_PHASE)==SPI_CR_PHASE); }/*** @param none* @return none* @brief Sets Polarity*/ void SPI_SetPolarity(void) {SPI->CTRL |= SPI_CR_POLARITY; }/*** @param none* @return none* @brief Clears Polarity*/ void SPI_ClrPolarity(void) {SPI->CTRL &= ~SPI_CR_POLARITY; }/*** @param none* @return uint32_t* @brief Returns Polarity*/ uint32_t SPI_GetPolarity(void) {return ((SPI->CTRL&SPI_CR_POLARITY)==SPI_CR_POLARITY); }/*** @param uint32_t* @return none* @brief Set ClkSel*/ void SPI_SetClkSel(uint32_t clksel) {SPI->CTRL &= ~SPI_CR_CLKSEL;SPI->CTRL |= ((clksel&SPI_CR_CLKSEL_Mask)<<SPI_CR_CLKSEL_Pos); }/*** @param none* @return uint32_t* @brief Returns ClkSel*/ uint32_t SPI_GetClkSel(void) {return ((SPI->CTRL >>SPI_CR_CLKSEL_Pos)&SPI_CR_CLKSEL_Mask); }/*** @param none* @return FlagStatus* @brief Reads transmit overrun error status*/ FlagStatus SPI_GetToeStatus(void) {return (FlagStatus)((SPI->STATUS&SPI_STATUS_TOE)==SPI_STATUS_TOE); }/*** @param none* @return FlagStatus* @brief Returns receive overrun error status*/ FlagStatus SPI_GetRoeStatus(void) {return (FlagStatus)((SPI->STATUS&SPI_STATUS_ROE)==SPI_STATUS_ROE); }/*** @param none* @return FlagStatus* @brief Returns transmitting status*/ FlagStatus SPI_GetTmtStatus(void) {return (FlagStatus)((SPI->STATUS&SPI_STATUS_TMT)==SPI_STATUS_TMT); }/*** @param none* @return FlagStatus* @brief Return transmit ready status*/ FlagStatus SPI_GetTrdyStatus(void) {return (FlagStatus)((SPI->STATUS & SPI_STATUS_TRDY) == SPI_STATUS_TRDY); }/*** @param none* @return FlagStatus* @brief Returns receive ready status*/ FlagStatus SPI_GetRrdyStatus(void) {return (FlagStatus)((SPI->STATUS&SPI_STATUS_RRDY)==SPI_STATUS_RRDY); }/*** @param none* @return FlagStatus* @brief Returns error Status*/ FlagStatus SPI_GetErrStatus(void) {return (FlagStatus)((SPI->STATUS&SPI_STATUS_ERR)==SPI_STATUS_ERR); }/*** @param none* @return none* @brief Clears transmit overrun error status*/ void SPI_ClrToeStatus(void) {SPI->STATUS |= SPI_STATUS_TOE; }/*** @param none* @return none* @brief Clears receive overrun error status*/ void SPI_ClrRoeStatus(void) {SPI->STATUS |= SPI_STATUS_ROE; }/*** @param none* @return none* @brief Clears error status*/ void SPI_ClrErrStatus(void) {SPI->STATUS |= SPI_STATUS_ERR; }/*** @param uint8_t cmd* @return uint8_t* @brief Reads and writes byte data*/ uint8_t SPI_ReadWriteByte(uint8_t cmd) {uint32_t master_rx_data;while (!(SPI->STATUS & (1UL << 5)));SPI->WDATA = cmd;while (!(SPI->STATUS & (1UL << 6)));master_rx_data = SPI->RDATA;return master_rx_data & 0xff; }/*** @param uint8_t data* @return none* @brief Writes Data*/ void SPI_WriteData(uint8_t data) {SPI_ReadWriteByte(data); }/*** @param none* @return uint8_t* @brief Reads Data*/ uint8_t SPI_ReadData(void) {return (SPI_ReadWriteByte(0xFF)); }/*** @param uint32_t slave address* @return none* @brief Select Slave*/ void SPI_Select_Slave(uint32_t Slave_address) {SPI->SSMASK = Slave_address; }/*** @}*//*** @}*//*** @}*//************************GowinSemiconductor******END OF FILE*******************/