mbed library sources. Supersedes mbed-src.
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Diff: targets/TARGET_NUVOTON/TARGET_NUC472/device/StdDriver/nuc472_i2c.c
- Revision:
- 153:9398a535854b
- Parent:
- 152:9a67f0b066fc
--- a/targets/TARGET_NUVOTON/TARGET_NUC472/device/StdDriver/nuc472_i2c.c Thu Dec 15 11:48:27 2016 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,310 +0,0 @@ -/****************************************************************************//** - * @file i2c.c - * @version V0.10 - * $Revision: 13 $ - * $Date: 14/09/30 1:10p $ - * @brief NUC472/NUC442 I2C 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_I2C_Driver I2C Driver - @{ -*/ - - -/** @addtogroup NUC472_442_I2C_EXPORTED_FUNCTIONS I2C Exported Functions - @{ -*/ - -/** - * @brief This function make I2C module be ready and set the wanted bus clock. - * @param[in] i2c is the base address of I2C module. - * @param[in] u32BusClock is the target bus speed of I2C module. - * @return Actual I2C bus clock frequency. - */ -uint32_t I2C_Open(I2C_T *i2c, uint32_t u32BusClock) -{ - uint32_t u32Div; - uint32_t u32Pclk = CLK_GetPCLKFreq(); - - u32Div = (uint32_t) ((( u32Pclk * 10)/(u32BusClock * 4) + 5) / 10 - 1); /* Compute proper divider for I2C clock */ - i2c->CLKDIV = u32Div; - - /* Enable I2C */ - i2c->CTL |= I2C_CTL_I2CEN_Msk; - - return ( u32Pclk / ((u32Div+1)<<2) ); -} - -/** - * @brief This function closes the I2C module. - * @param[in] i2c is the base address of I2C module. - * @return none - */ -void I2C_Close(I2C_T *i2c) -{ - /* Reset SPI */ - if((uint32_t)i2c == I2C0_BASE) { - SYS->IPRST1 |= SYS_IPRST1_I2C0RST_Msk; - SYS->IPRST1 &= ~SYS_IPRST1_I2C0RST_Msk; - } else if((uint32_t)i2c == I2C1_BASE) { - SYS->IPRST1 |= SYS_IPRST1_I2C1RST_Msk; - SYS->IPRST1 &= ~SYS_IPRST1_I2C1RST_Msk; - } else if((uint32_t)i2c == I2C2_BASE) { - SYS->IPRST1 |= SYS_IPRST1_I2C2RST_Msk; - SYS->IPRST1 &= ~SYS_IPRST1_I2C2RST_Msk; - } else { - SYS->IPRST1 |= SYS_IPRST1_I2C3RST_Msk; - SYS->IPRST1 &= ~SYS_IPRST1_I2C3RST_Msk; - } - - /* Disable I2C */ - i2c->CTL &= ~I2C_CTL_I2CEN_Msk; -} - -/** - * @brief This function clears the time-out flag. - * @param[in] i2c is the base address of I2C module. - * @return none - */ -void I2C_ClearTimeoutFlag(I2C_T *i2c) -{ - i2c->TOCTL |= I2C_TOCTL_TOIF_Msk; -} - -/** - * @brief This function sets the control bit of the I2C module. - * @param[in] i2c is the base address of I2C module. - * @param[in] u8Start sets START bit to I2C module. - * @param[in] u8Stop sets STOP bit to I2C module. - * @param[in] u8Si sets SI bit to I2C module. - * @param[in] u8Ack sets ACK bit to I2C module. - * @return none - */ -void I2C_Trigger(I2C_T *i2c, uint8_t u8Start, uint8_t u8Stop, uint8_t u8Si, uint8_t u8Ack) -{ - uint32_t u32Reg = 0; - uint32_t u32Val = i2c->CTL & ~(I2C_STA | I2C_STO | I2C_AA); - - if (u8Start) - u32Reg |= I2C_STA; - if (u8Stop) - u32Reg |= I2C_STO; - if (u8Si) - u32Reg |= I2C_SI; - if (u8Ack) - u32Reg |= I2C_AA; - - i2c->CTL = u32Val | u32Reg; -} - -/** - * @brief This function disables the interrupt of I2C module. - * @param[in] i2c is the base address of I2C module. - * @return none - */ -void I2C_DisableInt(I2C_T *i2c) -{ - i2c->CTL &= ~I2C_CTL_INTEN_Msk; -} - -/** - * @brief This function enables the interrupt (EI bit) of I2C module. - * @param[in] i2c is the base address of I2C module. - * @return none - */ -void I2C_EnableInt(I2C_T *i2c) -{ - i2c->CTL |= I2C_CTL_INTEN_Msk; -} - -/** - * @brief This function returns the real bus clock of I2C module. - * @param[in] i2c is the base address of I2C module. - * @return Actual I2C bus clock frequency. - */ -uint32_t I2C_GetBusClockFreq(I2C_T *i2c) -{ - uint32_t u32Divider = i2c->CLKDIV; - - return ( CLK_GetPCLKFreq() / ((u32Divider+1)<<2) ); -} - -/** - * @brief This function sets bus frequency of I2C module. - * @param[in] i2c is the base address of I2C module. - * @param[in] u32BusClock is the target bus speed of I2C module. - * @return Actual I2C bus clock frequency. - */ -uint32_t I2C_SetBusClockFreq(I2C_T *i2c, uint32_t u32BusClock) -{ - uint32_t u32Div; - uint32_t u32Pclk = CLK_GetPCLKFreq(); - - u32Div = (uint32_t) (((u32Pclk * 10)/(u32BusClock * 4) + 5) / 10 - 1); /* Compute proper divider for I2C clock */ - i2c->CLKDIV = u32Div; - - return ( u32Pclk / ((u32Div+1)<<2) ); -} - -/** - * @brief This function gets the interrupt flag of I2C module. - * @param[in] i2c is the base address of I2C module. - * @return Interrupt flag. - * @retval 0 Flag is not set. - * @retval 1 Flag is set. - */ -uint32_t I2C_GetIntFlag(I2C_T *i2c) -{ - return ( (i2c->CTL & I2C_CTL_SI_Msk) == I2C_CTL_SI_Msk ? 1:0 ); -} - -/** - * @brief This function returns the status of I2C module. - * @param[in] i2c is the base address of I2C module. - * @return I2C status - */ -uint32_t I2C_GetStatus(I2C_T *i2c) -{ - return ( i2c->STATUS ); -} - -/** - * @brief This function returns the data stored in data register of I2C module. - * @param[in] i2c is the base address of I2C module. - * @return I2C data. - */ -uint32_t I2C_GetData(I2C_T *i2c) -{ - return ( i2c->DAT ); -} - -/** - * @brief This function writes the data to data register of I2C module. - * @param[in] i2c is the base address of I2C module. - * @param[in] u8Data is the data which will be write to data register of I2C module. - * @return none - */ -void I2C_SetData(I2C_T *i2c, uint8_t u8Data) -{ - i2c->DAT = u8Data; -} - -/** - * @brief Configure slave address and enable GC mode. - * @param[in] i2c is the base address of I2C module. - * @param[in] u8SlaveNo is the set number of salve address. - * @param[in] u8SlaveAddr is the slave address. - * @param[in] u8GCMode GC mode enable or not. Valid values are: - * - \ref I2C_GCMODE_ENABLE - * - \ref I2C_GCMODE_DISABLE - * @return none - */ -void I2C_SetSlaveAddr(I2C_T *i2c, uint8_t u8SlaveNo, uint8_t u8SlaveAddr, uint8_t u8GCMode) -{ - switch (u8SlaveNo) { - case 0: - i2c->ADDR0 = (u8SlaveAddr << 1) | u8GCMode; - break; - case 1: - i2c->ADDR1 = (u8SlaveAddr << 1) | u8GCMode; - break; - case 2: - i2c->ADDR2 = (u8SlaveAddr << 1) | u8GCMode; - break; - case 3: - i2c->ADDR3 = (u8SlaveAddr << 1) | u8GCMode; - break; - default: - i2c->ADDR0 = (u8SlaveAddr << 1) | u8GCMode; - } -} - -/** - * @brief Configure the mask of slave address. The corresponding address bit is "Don't Care". - * @param[in] i2c is the base address of I2C module. - * @param[in] u8SlaveNo is the set number of salve address. - * @param[in] u8SlaveAddrMask is the slave address mask. - * @return none - */ -void I2C_SetSlaveAddrMask(I2C_T *i2c, uint8_t u8SlaveNo, uint8_t u8SlaveAddrMask) -{ - switch (u8SlaveNo) { - case 0: - i2c->ADDRMSK0 = u8SlaveAddrMask << 1; - break; - case 1: - i2c->ADDRMSK1 = u8SlaveAddrMask << 1; - break; - case 2: - i2c->ADDRMSK2 = u8SlaveAddrMask << 1; - break; - case 3: - i2c->ADDRMSK3 = u8SlaveAddrMask << 1; - break; - default: - i2c->ADDRMSK0 = u8SlaveAddrMask << 1; - } -} - -/** - * @brief This function enables timeout function and configures DIV4 function to support long timeout. - * @param[in] i2c is the base address of I2C module. - * @param[in] u8LongTimeout Enable timeout counter input clock is divide by 4. - * @return none - */ -void I2C_EnableTimeout(I2C_T *i2c, uint8_t u8LongTimeout) -{ - if(u8LongTimeout) - i2c->TOCTL |= I2C_TOCTL_TOCDIV4_Msk; - else - i2c->TOCTL &= ~I2C_TOCTL_TOCDIV4_Msk; - - i2c->TOCTL |= I2C_TOCTL_TOCEN_Msk; -} - -/** - * @brief This function disables time-out function. - * @param[in] i2c is the base address of I2C module. - * @return none - */ -void I2C_DisableTimeout(I2C_T *i2c) -{ - i2c->TOCTL &= ~I2C_TOCTL_TOCEN_Msk; -} - -/** - * @brief This function enables the wakeup function of I2C module. - * @param[in] i2c is the base address of I2C module. - * @return none - */ -void I2C_EnableWakeup(I2C_T *i2c) -{ - i2c->WKCTL |= I2C_WKCTL_WKEN_Msk; -} - -/** - * @brief This function disables the wakeup function of I2C module. - * @param[in] i2c is the base address of I2C module. - * @return none - */ -void I2C_DisableWakeup(I2C_T *i2c) -{ - i2c->WKCTL &= ~I2C_WKCTL_WKEN_Msk; -} - -/*@}*/ /* end of group NUC472_442_I2C_EXPORTED_FUNCTIONS */ - -/*@}*/ /* end of group NUC472_442_I2C_Driver */ - -/*@}*/ /* end of group NUC472_442_Device_Driver */ - -/*** (C) COPYRIGHT 2014 Nuvoton Technology Corp. ***/