mbed library sources. Supersedes mbed-src.
Fork of mbed-dev by
Diff: targets/TARGET_NUVOTON/TARGET_NUC472/device/StdDriver/nuc472_spi.c
- Revision:
- 149:156823d33999
- Parent:
- 144:ef7eb2e8f9f7
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/TARGET_NUVOTON/TARGET_NUC472/device/StdDriver/nuc472_spi.c Fri Oct 28 11:17:30 2016 +0100 @@ -0,0 +1,334 @@ +/****************************************************************************//** + * @file spi.c + * @version V0.10 + * $Revision: 15 $ + * $Date: 14/09/30 1:10p $ + * @brief NUC472/NUC442 SPI driver source file + * + * @note + * Copyright (C) 2014 Nuvoton Technology Corp. All rights reserved. +*****************************************************************************/ +#include "NUC472_442.h" + +/** @addtogroup NUC472_442_Device_Driver NUC472/NUC442 Device Driver + @{ +*/ + +/** @addtogroup NUC472_442_SPI_Driver SPI Driver + @{ +*/ + + +/** @addtogroup NUC472_442_SPI_EXPORTED_FUNCTIONS SPI Exported Functions + @{ +*/ + +/** + * @brief This function make SPI module be ready to transfer. + * By default, the SPI transfer sequence is MSB first and + * the automatic slave select function is disabled. In + * Slave mode, the u32BusClock must be NULL and the SPI clock + * divider setting will be 0. + * @param[in] spi is the base address of SPI module. + * @param[in] u32MasterSlave decides the SPI module is operating in master mode or in slave mode. Valid values are: + * - \ref SPI_SLAVE + * - \ref SPI_MASTER + * @param[in] u32SPIMode decides the transfer timing. Valid values are: + * - \ref SPI_MODE_0 + * - \ref SPI_MODE_1 + * - \ref SPI_MODE_2 + * - \ref SPI_MODE_3 + * @param[in] u32DataWidth decides the data width of a SPI transaction. + * @param[in] u32BusClock is the expected frequency of SPI bus clock in Hz. + * @return Actual frequency of SPI peripheral clock. + */ +uint32_t SPI_Open(SPI_T *spi, uint32_t u32MasterSlave, uint32_t u32SPIMode, uint32_t u32DataWidth, uint32_t u32BusClock) +{ + if(u32DataWidth == 32) + u32DataWidth = 0; + + spi->CTL = u32MasterSlave | (u32DataWidth << SPI_CTL_DWIDTH_Pos) | (u32SPIMode); + + return ( SPI_SetBusClock(spi, u32BusClock) ); +} + +/** + * @brief Reset SPI module and disable SPI peripheral clock. + * @param[in] spi is the base address of SPI module. + * @return none + */ +void SPI_Close(SPI_T *spi) +{ + /* Reset SPI */ + if((uint32_t)spi == SPI0_BASE) { + SYS->IPRST1 |= SYS_IPRST1_SPI0RST_Msk; + SYS->IPRST1 &= ~SYS_IPRST1_SPI0RST_Msk; + } else if((uint32_t)spi == SPI1_BASE) { + SYS->IPRST1 |= SYS_IPRST1_SPI1RST_Msk; + SYS->IPRST1 &= ~SYS_IPRST1_SPI1RST_Msk; + } else if((uint32_t)spi == SPI2_BASE) { + SYS->IPRST1 |= SYS_IPRST1_SPI2RST_Msk; + SYS->IPRST1 &= ~SYS_IPRST1_SPI2RST_Msk; + } else { + SYS->IPRST1 |= SYS_IPRST1_SPI3RST_Msk; + SYS->IPRST1 &= ~SYS_IPRST1_SPI3RST_Msk; + } +} + +/** + * @brief Clear Rx FIFO buffer. + * @param[in] spi is the base address of SPI module. + * @return none + */ +void SPI_ClearRxFIFO(SPI_T *spi) +{ + spi->FIFOCTL |= SPI_FIFOCTL_RXRST_Msk; +} + +/** + * @brief Clear Tx FIFO buffer. + * @param[in] spi is the base address of SPI module. + * @return none + */ +void SPI_ClearTxFIFO(SPI_T *spi) +{ + spi->FIFOCTL |= SPI_FIFOCTL_TXRST_Msk; +} + +/** + * @brief Disable the automatic slave select function. + * @param[in] spi is the base address of SPI module. + * @return none + */ +void SPI_DisableAutoSS(SPI_T *spi) +{ + spi->SSCTL &= ~SPI_SSCTL_AUTOSS_Msk; +} + +/** + * @brief Enable the automatic slave select function. Only available in Master mode. + * @param[in] spi is the base address of SPI module. + * @param[in] u32SSPinMask specifies slave select pins. Valid values are: + * - \ref SPI_SS0 + * - \ref SPI_SS1 + * @param[in] u32ActiveLevel specifies the active level of slave select signal. Valid values are: + * - \ref SPI_SS_ACTIVE_HIGH + * - \ref SPI_SS_ACTIVE_LOW + * @return none + */ +void SPI_EnableAutoSS(SPI_T *spi, uint32_t u32SSPinMask, uint32_t u32ActiveLevel) +{ + spi->SSCTL |= (u32SSPinMask | u32ActiveLevel) | SPI_SSCTL_AUTOSS_Msk; +} + +/** + * @brief Set the SPI bus clock. Only available in Master mode. + * @param[in] spi is the base address of SPI module. + * @param[in] u32BusClock is the expected frequency of SPI bus clock. + * @return Actual frequency of SPI peripheral clock. + */ +uint32_t SPI_SetBusClock(SPI_T *spi, uint32_t u32BusClock) +{ + uint32_t u32ClkSrc, u32Div = 0; + + if(spi == SPI0) { + if((CLK->CLKSEL1 & CLK_CLKSEL1_SPI0SEL_Msk) == CLK_CLKSEL1_SPI0SEL_PCLK) + u32ClkSrc = CLK_GetPCLKFreq(); + else + u32ClkSrc = CLK_GetPLLClockFreq(); + } else if(spi == SPI1) { + if((CLK->CLKSEL1 & CLK_CLKSEL1_SPI1SEL_Msk) == CLK_CLKSEL1_SPI1SEL_PCLK) + u32ClkSrc = CLK_GetPCLKFreq(); + else + u32ClkSrc = CLK_GetPLLClockFreq(); + } else if(spi == SPI2) { + if((CLK->CLKSEL1 & CLK_CLKSEL1_SPI1SEL_Msk) == CLK_CLKSEL1_SPI2SEL_PCLK) + u32ClkSrc = CLK_GetPCLKFreq(); + else + u32ClkSrc = CLK_GetPLLClockFreq(); + } else { + if((CLK->CLKSEL1 & CLK_CLKSEL1_SPI3SEL_Msk) == CLK_CLKSEL1_SPI3SEL_PCLK) + u32ClkSrc = CLK_GetPCLKFreq(); + else + u32ClkSrc = CLK_GetPLLClockFreq(); + } + + + if(u32BusClock != 0 ) { + u32Div = (u32ClkSrc / u32BusClock) - 1; + if(u32Div > SPI_CLKDIV_DIVIDER_Msk) + u32Div = SPI_CLKDIV_DIVIDER_Msk; + } + + spi->CLKDIV = (spi->CLKDIV & ~SPI_CLKDIV_DIVIDER_Msk) | u32Div; + + return ( u32ClkSrc / (u32Div+1) ); +} + +/** + * @brief Set Tx FIFO threshold and Rx FIFO threshold configurations. + * @param[in] spi is the base address of SPI module. + * @param[in] u32TxThreshold decides the Tx FIFO threshold. + * @param[in] u32RxThreshold decides the Rx FIFO threshold. + * @return none + */ +void SPI_SetFIFOThreshold(SPI_T *spi, uint32_t u32TxThreshold, uint32_t u32RxThreshold) +{ + spi->FIFOCTL = (spi->FIFOCTL & ~(SPI_FIFOCTL_TXTH_Msk | SPI_FIFOCTL_RXTH_Msk) | + (u32TxThreshold << SPI_FIFOCTL_TXTH_Pos) | + (u32RxThreshold << SPI_FIFOCTL_RXTH_Pos)); +} + +/** + * @brief Get the actual frequency of SPI bus clock. Only available in Master mode. + * @param[in] spi is the base address of SPI module. + * @return Actual SPI bus clock frequency. + */ +uint32_t SPI_GetBusClock(SPI_T *spi) +{ + uint32_t u32Div; + uint32_t u32ClkSrc; + + if(spi == SPI0) { + if((CLK->CLKSEL1 & CLK_CLKSEL1_SPI0SEL_Msk) == CLK_CLKSEL1_SPI0SEL_PCLK) + u32ClkSrc = CLK_GetPCLKFreq(); + else + u32ClkSrc = CLK_GetPLLClockFreq(); + } else if(spi == SPI1) { + if((CLK->CLKSEL1 & CLK_CLKSEL1_SPI1SEL_Msk) == CLK_CLKSEL1_SPI1SEL_PCLK) + u32ClkSrc = CLK_GetPCLKFreq(); + else + u32ClkSrc = CLK_GetPLLClockFreq(); + } else if(spi == SPI2) { + if((CLK->CLKSEL1 & CLK_CLKSEL1_SPI2SEL_Msk) == CLK_CLKSEL1_SPI2SEL_PCLK) + u32ClkSrc = CLK_GetPCLKFreq(); + else + u32ClkSrc = CLK_GetPLLClockFreq(); + } else { + if((CLK->CLKSEL1 & CLK_CLKSEL1_SPI3SEL_Msk) == CLK_CLKSEL1_SPI3SEL_PCLK) + u32ClkSrc = CLK_GetPCLKFreq(); + else + u32ClkSrc = CLK_GetPLLClockFreq(); + } + + u32Div = spi->CLKDIV & SPI_CLKDIV_DIVIDER_Msk; + return (u32ClkSrc / (u32Div + 1)); +} + +/** + * @brief Enable FIFO related interrupts specified by u32Mask parameter. + * @param[in] spi is the base address of SPI module. + * @param[in] u32Mask is the combination of all related interrupt enable bits. + * Each bit corresponds to a interrupt bit. + * This parameter decides which interrupts will be enabled. Valid values are: + * - \ref SPI_UNITIEN_MASK + * - \ref SPI_SSINAIEN_MASK + * - \ref SPI_SSACTIEN_MASK + * - \ref SPI_SLVURIEN_MASK + * - \ref SPI_SLVBEIEN_MASK + * - \ref SPI_SLVTOIEN_MASK + * - \ref SPI_FIFO_TXTHIEN_MASK + * - \ref SPI_FIFO_RXTHIEN_MASK + * - \ref SPI_FIFO_RXOVIEN_MASK + * - \ref SPI_FIFO_TXUFIEN_MASK + * - \ref SPI_FIFO_RXTOIEN_MASK + * @return none + */ +void SPI_EnableInt(SPI_T *spi, uint32_t u32Mask) +{ + if((u32Mask & SPI_UNITIEN_MASK) == SPI_UNITIEN_MASK) + spi->CTL |= SPI_CTL_UNITIEN_Msk; + + if((u32Mask & SPI_SSINAIEN_MASK) == SPI_SSINAIEN_MASK) + spi->SSCTL |= SPI_SSCTL_SSINAIEN_Msk; + + if((u32Mask & SPI_SSACTIEN_MASK) == SPI_SSACTIEN_MASK) + spi->SSCTL |= SPI_SSCTL_SSACTIEN_Msk; + + if((u32Mask & SPI_SLVURIEN_MASK) == SPI_SLVURIEN_MASK) + spi->SSCTL |= SPI_SSCTL_SLVURIEN_Msk; + + if((u32Mask & SPI_SLVBEIEN_MASK) == SPI_SLVBEIEN_MASK) + spi->SSCTL |= SPI_SSCTL_SLVBEIEN_Msk; + + if((u32Mask & SPI_SLVTOIEN_MASK) == SPI_SLVTOIEN_MASK) + spi->SSCTL |= SPI_SSCTL_SLVTOIEN_Msk; + + if((u32Mask & SPI_FIFO_TXTHIEN_MASK) == SPI_FIFO_TXTHIEN_MASK) + spi->FIFOCTL |= SPI_FIFOCTL_TXTHIEN_Msk; + + if((u32Mask & SPI_FIFO_RXTHIEN_MASK) == SPI_FIFO_RXTHIEN_MASK) + spi->FIFOCTL |= SPI_FIFOCTL_RXTHIEN_Msk; + + if((u32Mask & SPI_FIFO_RXOVIEN_MASK) == SPI_FIFO_RXOVIEN_MASK) + spi->FIFOCTL |= SPI_FIFOCTL_RXOVIEN_Msk; + + if((u32Mask & SPI_FIFO_TXUFIEN_MASK) == SPI_FIFO_TXUFIEN_MASK) + spi->FIFOCTL |= SPI_FIFOCTL_TXUFIEN_Msk; + + if((u32Mask & SPI_FIFO_RXTOIEN_MASK) == SPI_FIFO_RXTOIEN_MASK) + spi->FIFOCTL |= SPI_FIFOCTL_RXTOIEN_Msk; +} + +/** + * @brief Disable FIFO related interrupts specified by u32Mask parameter. + * @param[in] spi is the base address of SPI module. + * @param[in] u32Mask is the combination of all related interrupt enable bits. + * Each bit corresponds to a interrupt bit. + * This parameter decides which interrupts will be enabled. Valid values are: + * - \ref SPI_UNITIEN_MASK + * - \ref SPI_SSINAIEN_MASK + * - \ref SPI_SSACTIEN_MASK + * - \ref SPI_SLVURIEN_MASK + * - \ref SPI_SLVBEIEN_MASK + * - \ref SPI_SLVTOIEN_MASK + * - \ref SPI_FIFO_TXTHIEN_MASK + * - \ref SPI_FIFO_RXTHIEN_MASK + * - \ref SPI_FIFO_RXOVIEN_MASK + * - \ref SPI_FIFO_TXUFIEN_MASK + * - \ref SPI_FIFO_RXTOIEN_MASK + * @return none + */ +void SPI_DisableInt(SPI_T *spi, uint32_t u32Mask) +{ + if((u32Mask & SPI_UNITIEN_MASK) == SPI_UNITIEN_MASK) + spi->CTL &= ~SPI_CTL_UNITIEN_Msk; + + if((u32Mask & SPI_SSINAIEN_MASK) == SPI_SSINAIEN_MASK) + spi->SSCTL &= ~SPI_SSCTL_SSINAIEN_Msk; + + if((u32Mask & SPI_SSACTIEN_MASK) == SPI_SSACTIEN_MASK) + spi->SSCTL &= ~SPI_SSCTL_SSACTIEN_Msk; + + if((u32Mask & SPI_SLVURIEN_MASK) == SPI_SLVURIEN_MASK) + spi->SSCTL &= ~SPI_SSCTL_SLVURIEN_Msk; + + if((u32Mask & SPI_SLVBEIEN_MASK) == SPI_SLVBEIEN_MASK) + spi->SSCTL &= ~SPI_SSCTL_SLVBEIEN_Msk; + + if((u32Mask & SPI_SLVTOIEN_MASK) == SPI_SLVTOIEN_MASK) + spi->SSCTL &= ~SPI_SSCTL_SLVTOIEN_Msk; + + if((u32Mask & SPI_FIFO_TXTHIEN_MASK) == SPI_FIFO_TXTHIEN_MASK) + spi->FIFOCTL &= ~SPI_FIFOCTL_TXTHIEN_Msk; + + if((u32Mask & SPI_FIFO_RXTHIEN_MASK) == SPI_FIFO_RXTHIEN_MASK) + spi->FIFOCTL &= ~SPI_FIFOCTL_RXTHIEN_Msk; + + if((u32Mask & SPI_FIFO_RXOVIEN_MASK) == SPI_FIFO_RXOVIEN_MASK) + spi->FIFOCTL &= ~SPI_FIFOCTL_RXOVIEN_Msk; + + if((u32Mask & SPI_FIFO_TXUFIEN_MASK) == SPI_FIFO_TXUFIEN_MASK) + spi->FIFOCTL &= ~SPI_FIFOCTL_TXUFIEN_Msk; + + if((u32Mask & SPI_FIFO_RXTOIEN_MASK) == SPI_FIFO_RXTOIEN_MASK) + spi->FIFOCTL &= ~SPI_FIFOCTL_RXTOIEN_Msk; +} + +/*@}*/ /* end of group NUC472_442_SPI_EXPORTED_FUNCTIONS */ + +/*@}*/ /* end of group NUC472_442_SPI_Driver */ + +/*@}*/ /* end of group NUC472_442_Device_Driver */ + +/*** (C) COPYRIGHT 2014 Nuvoton Technology Corp. ***/