| /**************************************************************************//** | |
| * @file i2c.c | |
| * @version V3.00 | |
| * $Revision: 2 $ | |
| * $Date: 16/08/02 6:02p $ | |
| * @brief M2351 series I2C Serial Interface Controller(I2C) driver source file | |
| * | |
| * @note | |
| * Copyright (C) 2016 Nuvoton Technology Corp. All rights reserved. | |
| *****************************************************************************/ | |
| #include "NuMicro.h" | |
| /** @addtogroup Standard_Driver Standard Driver | |
| @{ | |
| */ | |
| /** @addtogroup I2C_Driver I2C Driver | |
| @{ | |
| */ | |
| /** @addtogroup I2C_EXPORTED_FUNCTIONS I2C Exported Functions | |
| @{ | |
| */ | |
| /** | |
| * @brief Enable specify I2C Controller and set Clock Divider | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * @param[in] u32BusClock The target I2C bus clock in Hz | |
| * | |
| * @return Actual I2C bus clock frequency | |
| * | |
| * @details The function enable the specify I2C Controller and set proper Clock Divider | |
| * in I2C CLOCK DIVIDED REGISTER (I2CLK) according to the target I2C Bus clock. | |
| * I2C Bus clock = PCLK / (4*(divider+1). | |
| * | |
| */ | |
| uint32_t I2C_Open(I2C_T *i2c, uint32_t u32BusClock) | |
| { | |
| uint32_t u32Div; | |
| uint32_t u32Pclk; | |
| if((i2c == I2C1) || (i2c == I2C1_NS)) | |
| { | |
| u32Pclk = CLK_GetPCLK1Freq(); | |
| } | |
| else | |
| { | |
| u32Pclk = CLK_GetPCLK0Freq(); | |
| } | |
| u32Div = (uint32_t)(((u32Pclk * 10u) / (u32BusClock * 4u) + 5u) / 10u - 1u); /* Compute proper divider for I2C clock */ | |
| i2c->CLKDIV = u32Div; | |
| /* Enable I2C */ | |
| i2c->CTL0 |= I2C_CTL0_I2CEN_Msk; | |
| return (u32Pclk / ((u32Div + 1u) << 2u)); | |
| } | |
| /** | |
| * @brief Disable specify I2C Controller | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * | |
| * @return None | |
| * | |
| * @details Reset I2C Controller and disable specify I2C port. | |
| * | |
| */ | |
| void I2C_Close(I2C_T *i2c) | |
| { | |
| /* Reset I2C Controller */ | |
| if(i2c == I2C0) | |
| { | |
| SYS->IPRST1 |= SYS_IPRST1_I2C0RST_Msk; | |
| SYS->IPRST1 &= ~SYS_IPRST1_I2C0RST_Msk; | |
| } | |
| else if(i2c == I2C1) | |
| { | |
| SYS->IPRST1 |= SYS_IPRST1_I2C1RST_Msk; | |
| SYS->IPRST1 &= ~SYS_IPRST1_I2C1RST_Msk; | |
| } | |
| else if(i2c == I2C2) | |
| { | |
| SYS->IPRST1 |= SYS_IPRST1_I2C2RST_Msk; | |
| SYS->IPRST1 &= ~SYS_IPRST1_I2C2RST_Msk; | |
| } | |
| /* Disable I2C */ | |
| i2c->CTL0 &= ~I2C_CTL0_I2CEN_Msk; | |
| } | |
| /** | |
| * @brief Clear Time-out Counter flag | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * | |
| * @return None | |
| * | |
| * @details When Time-out flag will be set, use this function to clear I2C Bus Time-out counter flag . | |
| * | |
| */ | |
| void I2C_ClearTimeoutFlag(I2C_T *i2c) | |
| { | |
| i2c->TOCTL |= I2C_TOCTL_TOIF_Msk; | |
| } | |
| /** | |
| * @brief Set Control bit of I2C Controller | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * @param[in] u8Start Set I2C START condition | |
| * @param[in] u8Stop Set I2C STOP condition | |
| * @param[in] u8Si Clear SI flag | |
| * @param[in] u8Ack Set I2C ACK bit | |
| * | |
| * @return None | |
| * | |
| * @details The function set I2C Control bit of I2C Bus protocol. | |
| * | |
| */ | |
| void I2C_Trigger(I2C_T *i2c, uint8_t u8Start, uint8_t u8Stop, uint8_t u8Si, uint8_t u8Ack) | |
| { | |
| uint32_t u32Reg = 0u; | |
| if(u8Start) | |
| { | |
| u32Reg |= I2C_CTL_STA; | |
| } | |
| if(u8Stop) | |
| { | |
| u32Reg |= I2C_CTL_STO; | |
| } | |
| if(u8Si) | |
| { | |
| u32Reg |= I2C_CTL_SI; | |
| } | |
| if(u8Ack) | |
| { | |
| u32Reg |= I2C_CTL_AA; | |
| } | |
| i2c->CTL0 = (i2c->CTL0 & ~0x3Cu) | u32Reg; | |
| } | |
| /** | |
| * @brief Disable Interrupt of I2C Controller | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * | |
| * @return None | |
| * | |
| * @details The function is used for disable I2C interrupt | |
| * | |
| */ | |
| void I2C_DisableInt(I2C_T *i2c) | |
| { | |
| i2c->CTL0 &= ~I2C_CTL0_INTEN_Msk; | |
| } | |
| /** | |
| * @brief Enable Interrupt of I2C Controller | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * | |
| * @return None | |
| * | |
| * @details The function is used for enable I2C interrupt | |
| * | |
| */ | |
| void I2C_EnableInt(I2C_T *i2c) | |
| { | |
| i2c->CTL0 |= I2C_CTL0_INTEN_Msk; | |
| } | |
| /** | |
| * @brief Get I2C Bus Clock | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * | |
| * @return The actual I2C Bus clock in Hz | |
| * | |
| * @details To get the actual I2C Bus Clock frequency. | |
| */ | |
| uint32_t I2C_GetBusClockFreq(I2C_T *i2c) | |
| { | |
| uint32_t u32Divider = i2c->CLKDIV; | |
| uint32_t u32Pclk; | |
| if((i2c == I2C1) || (i2c == I2C1_NS)) | |
| { | |
| u32Pclk = CLK_GetPCLK1Freq(); | |
| } | |
| else | |
| { | |
| u32Pclk = CLK_GetPCLK0Freq(); | |
| } | |
| return (u32Pclk / ((u32Divider + 1u) << 2u)); | |
| } | |
| /** | |
| * @brief Set I2C Bus Clock | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * @param[in] u32BusClock The target I2C Bus Clock in Hz | |
| * | |
| * @return The actual I2C Bus Clock in Hz | |
| * | |
| * @details To set the actual I2C Bus Clock frequency. | |
| */ | |
| uint32_t I2C_SetBusClockFreq(I2C_T *i2c, uint32_t u32BusClock) | |
| { | |
| uint32_t u32Div; | |
| uint32_t u32Pclk; | |
| if((i2c == I2C1) || (i2c == I2C1_NS)) | |
| { | |
| u32Pclk = CLK_GetPCLK1Freq(); | |
| } | |
| else | |
| { | |
| u32Pclk = CLK_GetPCLK0Freq(); | |
| } | |
| u32Div = (uint32_t)(((u32Pclk * 10u) / (u32BusClock * 4u) + 5u) / 10u - 1u); /* Compute proper divider for I2C clock */ | |
| i2c->CLKDIV = u32Div; | |
| return (u32Pclk / ((u32Div + 1u) << 2u)); | |
| } | |
| /** | |
| * @brief Get Interrupt Flag | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * | |
| * @return I2C interrupt flag status | |
| * | |
| * @details To get I2C Bus interrupt flag. | |
| */ | |
| uint32_t I2C_GetIntFlag(I2C_T *i2c) | |
| { | |
| return ((i2c->CTL0 & I2C_CTL0_SI_Msk) == I2C_CTL0_SI_Msk ? 1ul : 0ul); | |
| } | |
| /** | |
| * @brief Get I2C Bus Status Code | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * | |
| * @return I2C Status Code | |
| * | |
| * @details To get I2C Bus Status Code. | |
| */ | |
| uint32_t I2C_GetStatus(I2C_T *i2c) | |
| { | |
| return (i2c->STATUS0); | |
| } | |
| /** | |
| * @brief Read a Byte from I2C Bus | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * | |
| * @return I2C Data | |
| * | |
| * @details To read a bytes data from specify I2C port. | |
| */ | |
| uint8_t I2C_GetData(I2C_T *i2c) | |
| { | |
| return (uint8_t)(i2c->DAT); | |
| } | |
| /** | |
| * @brief Send a byte to I2C Bus | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * @param[in] u8Data The data to send to I2C bus | |
| * | |
| * @return None | |
| * | |
| * @details This function is used to write a byte to specified I2C port | |
| */ | |
| void I2C_SetData(I2C_T *i2c, uint8_t u8Data) | |
| { | |
| i2c->DAT = u8Data; | |
| } | |
| /** | |
| * @brief Set 7-bit Slave Address and GC Mode | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * @param[in] u8SlaveNo Set the number of I2C address register (0~3) | |
| * @param[in] u8SlaveAddr 7-bit slave address | |
| * @param[in] u8GCMode Enable/Disable GC mode (I2C_GCMODE_ENABLE / I2C_GCMODE_DISABLE) | |
| * | |
| * @return None | |
| * | |
| * @details This function is used to set 7-bit slave addresses in I2C SLAVE ADDRESS REGISTER (I2CADDR0~3) | |
| * and enable GC Mode. | |
| * | |
| */ | |
| void I2C_SetSlaveAddr(I2C_T *i2c, uint8_t u8SlaveNo, uint8_t u8SlaveAddr, uint8_t u8GCMode) | |
| { | |
| switch(u8SlaveNo) | |
| { | |
| case 1: | |
| i2c->ADDR1 = ((uint32_t)u8SlaveAddr << 1) | u8GCMode; | |
| break; | |
| case 2: | |
| i2c->ADDR2 = ((uint32_t)u8SlaveAddr << 1) | u8GCMode; | |
| break; | |
| case 3: | |
| i2c->ADDR3 = ((uint32_t)u8SlaveAddr << 1) | u8GCMode; | |
| break; | |
| case 0: | |
| default: | |
| i2c->ADDR0 = ((uint32_t)u8SlaveAddr << 1) | u8GCMode; | |
| break; | |
| } | |
| } | |
| /** | |
| * @brief Configure the mask bits of 7-bit Slave Address | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * @param[in] u8SlaveNo Set the number of I2C address mask register (0~3) | |
| * @param[in] u8SlaveAddrMask A byte for slave address mask | |
| * | |
| * @return None | |
| * | |
| * @details This function is used to set 7-bit slave addresses. | |
| * | |
| */ | |
| void I2C_SetSlaveAddrMask(I2C_T *i2c, uint8_t u8SlaveNo, uint8_t u8SlaveAddrMask) | |
| { | |
| switch(u8SlaveNo) | |
| { | |
| case 1: | |
| i2c->ADDRMSK1 = (uint32_t)u8SlaveAddrMask << 1; | |
| break; | |
| case 2: | |
| i2c->ADDRMSK2 = (uint32_t)u8SlaveAddrMask << 1; | |
| break; | |
| case 3: | |
| i2c->ADDRMSK3 = (uint32_t)u8SlaveAddrMask << 1; | |
| break; | |
| case 0: | |
| default: | |
| i2c->ADDRMSK0 = (uint32_t)u8SlaveAddrMask << 1; | |
| break; | |
| } | |
| } | |
| /** | |
| * @brief Enable Time-out Counter Function and support Long Time-out | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * @param[in] u8LongTimeout Configure DIV4 to enable Long Time-out (0/1) | |
| * | |
| * @return None | |
| * | |
| * @details This function enable Time-out Counter function and configure DIV4 to support Long | |
| * Time-out. | |
| * | |
| */ | |
| 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 Disable Time-out Counter Function | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * | |
| * @return None | |
| * | |
| * @details To disable Time-out Counter function in I2CTOC register. | |
| * | |
| */ | |
| void I2C_DisableTimeout(I2C_T *i2c) | |
| { | |
| i2c->TOCTL &= ~I2C_TOCTL_TOCEN_Msk; | |
| } | |
| /** | |
| * @brief Enable I2C Wake-up Function | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * | |
| * @return None | |
| * | |
| * @details To enable Wake-up function of I2C Wake-up control register. | |
| * | |
| */ | |
| void I2C_EnableWakeup(I2C_T *i2c) | |
| { | |
| i2c->WKCTL |= I2C_WKCTL_WKEN_Msk; | |
| } | |
| /** | |
| * @brief Disable I2C Wake-up Function | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * | |
| * @return None | |
| * | |
| * @details To disable Wake-up function of I2C Wake-up control register. | |
| * | |
| */ | |
| void I2C_DisableWakeup(I2C_T *i2c) | |
| { | |
| i2c->WKCTL &= ~I2C_WKCTL_WKEN_Msk; | |
| } | |
| /** | |
| * @brief To get SMBus Status | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * | |
| * @return SMBus status | |
| * | |
| * @details To get the Bus Management status of I2C_BUSSTS register | |
| * | |
| */ | |
| uint32_t I2C_SMBusGetStatus(I2C_T *i2c) | |
| { | |
| return (i2c->BUSSTS); | |
| } | |
| /** | |
| * @brief Clear SMBus Interrupt Flag | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * @param[in] u8SMBusIntFlag Specify SMBus interrupt flag | |
| * | |
| * @return None | |
| * | |
| * @details To clear flags of I2C_BUSSTS status register if interrupt set. | |
| * | |
| */ | |
| void I2C_SMBusClearInterruptFlag(I2C_T *i2c, uint8_t u8SMBusIntFlag) | |
| { | |
| i2c->BUSSTS = u8SMBusIntFlag; | |
| } | |
| /** | |
| * @brief Set SMBus Bytes Counts of Transmission or Reception | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * @param[in] u32PktSize Transmit / Receive bytes | |
| * | |
| * @return None | |
| * | |
| * @details The transmission or receive byte number in one transaction when PECEN is set. The maximum is 255 bytes. | |
| * | |
| */ | |
| void I2C_SMBusSetPacketByteCount(I2C_T *i2c, uint32_t u32PktSize) | |
| { | |
| i2c->PKTSIZE = u32PktSize; | |
| } | |
| /** | |
| * @brief Init SMBus Host/Device Mode | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * @param[in] u8HostDevice Init SMBus port mode(I2C_SMBH_ENABLE(1)/I2C_SMBD_ENABLE(0)) | |
| * | |
| * @return None | |
| * | |
| * @details Using SMBus communication must specify the port is a Host or a Device. | |
| * | |
| */ | |
| void I2C_SMBusOpen(I2C_T *i2c, uint8_t u8HostDevice) | |
| { | |
| /* Clear BMHEN, BMDEN of BUSCTL Register */ | |
| i2c->BUSCTL &= ~(I2C_BUSCTL_BMHEN_Msk | I2C_BUSCTL_BMDEN_Msk); | |
| /* Set SMBus Host/Device Mode, and enable Bus Management*/ | |
| if(u8HostDevice == (uint8_t)I2C_SMBH_ENABLE) | |
| { | |
| i2c->BUSCTL |= (I2C_BUSCTL_BMHEN_Msk | I2C_BUSCTL_BUSEN_Msk); | |
| } | |
| else | |
| { | |
| i2c->BUSCTL |= (I2C_BUSCTL_BMDEN_Msk | I2C_BUSCTL_BUSEN_Msk); | |
| } | |
| } | |
| /** | |
| * @brief Disable SMBus function | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * | |
| * @return None | |
| * | |
| * @details Disable all SMBus function include Bus disable, CRC check, Acknowledge by manual, Host/Device Mode. | |
| * | |
| */ | |
| void I2C_SMBusClose(I2C_T *i2c) | |
| { | |
| i2c->BUSCTL = 0x00U; | |
| } | |
| /** | |
| * @brief Enable SMBus PEC Transmit Function | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * @param[in] u8PECTxEn CRC transmit enable(PECTX_ENABLE) or disable(PECTX_DISABLE) | |
| * | |
| * @return None | |
| * | |
| * @details When enable CRC check function, the Host or Device needs to transmit CRC byte. | |
| * | |
| */ | |
| void I2C_SMBusPECTxEnable(I2C_T *i2c, uint8_t u8PECTxEn) | |
| { | |
| i2c->BUSCTL &= ~I2C_BUSCTL_PECTXEN_Msk; | |
| if(u8PECTxEn) | |
| { | |
| i2c->BUSCTL |= (I2C_BUSCTL_PECEN_Msk | I2C_BUSCTL_PECTXEN_Msk); | |
| } | |
| else | |
| { | |
| i2c->BUSCTL |= I2C_BUSCTL_PECEN_Msk; | |
| } | |
| } | |
| /** | |
| * @brief Get SMBus CRC value | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * | |
| * @return A byte is packet error check value | |
| * | |
| * @details The CRC check value after a transmission or a reception by count by using CRC8 | |
| * | |
| */ | |
| uint8_t I2C_SMBusGetPECValue(I2C_T *i2c) | |
| { | |
| return (uint8_t)i2c->PKTCRC; | |
| } | |
| /** | |
| * @brief Calculate Time-out of SMBus idle period | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * @param[in] u32Us Time-out length(us) | |
| * @param[in] u32Hclk I2C peripheral clock frequency | |
| * | |
| * @return None | |
| * | |
| * @details This function is used to set SMBus Time-out length when bus is in Idle state. | |
| * | |
| */ | |
| void I2C_SMBusIdleTimeout(I2C_T *i2c, uint32_t u32Us, uint32_t u32Hclk) | |
| { | |
| uint32_t u32Div, u32HclkKHz; | |
| i2c->BUSCTL |= I2C_BUSCTL_TIDLE_Msk; | |
| u32HclkKHz = u32Hclk / 1000U; | |
| u32Div = (((u32Us * u32HclkKHz) / 1000U) >> 2U) - 1U; | |
| if(u32Div > 255U) | |
| { | |
| i2c->BUSTOUT = 0xFFU; | |
| } | |
| else | |
| { | |
| i2c->BUSTOUT = u32Div; | |
| } | |
| } | |
| /** | |
| * @brief Calculate Time-out of SMBus active period | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * @param[in] ms Time-out length(ms) | |
| * @param[in] u32Pclk peripheral clock frequency | |
| * | |
| * @return None | |
| * | |
| * @details This function is used to set SMBus Time-out length when bus is in active state. | |
| * Time-out length is calculate the SCL line "one clock" pull low timing. | |
| * | |
| */ | |
| void I2C_SMBusTimeout(I2C_T *i2c, uint32_t ms, uint32_t u32Pclk) | |
| { | |
| uint32_t u32Div, u32Pclk_kHz; | |
| i2c->BUSCTL &= ~I2C_BUSCTL_TIDLE_Msk; | |
| /* DIV4 disabled */ | |
| i2c->TOCTL &= ~I2C_TOCTL_TOCEN_Msk; | |
| u32Pclk_kHz = u32Pclk / 1000U; | |
| u32Div = ((ms * u32Pclk_kHz) / (16U * 1024U)) - 1U; | |
| if(u32Div <= 0xFFU) | |
| { | |
| i2c->BUSTOUT = u32Div; | |
| } | |
| else | |
| { | |
| /* DIV4 enabled */ | |
| i2c->TOCTL |= I2C_TOCTL_TOCEN_Msk; | |
| i2c->BUSTOUT = (((ms * u32Pclk_kHz) / (16U * 1024U * 4U)) - 1U) & 0xFFU; /* The max value is 255 */ | |
| } | |
| } | |
| /** | |
| * @brief Calculate Cumulative Clock low Time-out of SMBus active period | |
| * | |
| * @param[in] i2c Specify I2C port | |
| * @param[in] ms Time-out length(ms) | |
| * @param[in] u32Pclk peripheral clock frequency | |
| * | |
| * @return None | |
| * | |
| * @details This function is used to set SMBus Time-out length when bus is in Active state. | |
| * Time-out length is calculate the SCL line "clocks" low cumulative timing. | |
| * | |
| */ | |
| void I2C_SMBusClockLoTimeout(I2C_T *i2c, uint32_t ms, uint32_t u32Pclk) | |
| { | |
| uint32_t u32Div, u32Pclk_kHz; | |
| i2c->BUSCTL &= ~I2C_BUSCTL_TIDLE_Msk; | |
| /* DIV4 disabled */ | |
| i2c->TOCTL &= ~I2C_TOCTL_TOCEN_Msk; | |
| u32Pclk_kHz = u32Pclk / 1000U; | |
| u32Div = ((ms * u32Pclk_kHz) / (16U * 1024U)) - 1U; | |
| if(u32Div <= 0xFFU) | |
| { | |
| i2c->CLKTOUT = u32Div; | |
| } | |
| else | |
| { | |
| /* DIV4 enabled */ | |
| i2c->TOCTL |= I2C_TOCTL_TOCEN_Msk; | |
| i2c->CLKTOUT = (((ms * u32Pclk_kHz) / (16U * 1024U * 4U)) - 1U) & 0xFFU; /* The max value is 255 */ | |
| } | |
| } | |
| /** | |
| * @brief Write a byte to Slave | |
| * | |
| * @param[in] *i2c Point to I2C peripheral | |
| * @param[in] u8SlaveAddr Access Slave address(7-bit) | |
| * @param[in] u8Data Write a byte data to Slave | |
| * | |
| * @retval 0 Write data success | |
| * @retval 1 Write data fail, or bus occurs error events | |
| * | |
| * @details The function is used for I2C Master write a byte data to Slave. | |
| * | |
| */ | |
| uint8_t I2C_WriteByte(I2C_T *i2c, uint8_t u8SlaveAddr, uint8_t u8Data) | |
| { | |
| uint8_t u8Xfering = 1u, u8Err = 0u, u8Ctrl = 0u; | |
| I2C_START(i2c); | |
| while(u8Xfering && (u8Err == 0u)) | |
| { | |
| I2C_WAIT_READY(i2c) {} | |
| switch(I2C_GET_STATUS(i2c)) | |
| { | |
| case 0x08u: | |
| I2C_SET_DATA(i2c, (uint8_t)(u8SlaveAddr << 1u | 0x00u)); /* Write SLA+W to Register I2CDAT */ | |
| u8Ctrl = I2C_CTL_SI; /* Clear SI */ | |
| break; | |
| case 0x18u: /* Slave Address ACK */ | |
| I2C_SET_DATA(i2c, u8Data); /* Write data to I2CDAT */ | |
| break; | |
| case 0x20u: /* Slave Address NACK */ | |
| case 0x30u: /* Master transmit data NACK */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| case 0x28u: | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Xfering = 0u; | |
| break; | |
| case 0x38u: /* Arbitration Lost */ | |
| default: /* Unknow status */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| } | |
| I2C_SET_CONTROL_REG(i2c, u8Ctrl); /* Write controlbit to I2C_CTL register */ | |
| } | |
| return (u8Err | u8Xfering); /* return (Success)/(Fail) status */ | |
| } | |
| /** | |
| * @brief Write multi bytes to Slave | |
| * | |
| * @param[in] *i2c Point to I2C peripheral | |
| * @param[in] u8SlaveAddr Access Slave address(7-bit) | |
| * @param[in] *au8Data Pointer to array to write data to Slave | |
| * @param[in] u32wLen How many bytes need to write to Slave | |
| * | |
| * @return A length of how many bytes have been transmitted. | |
| * | |
| * @details The function is used for I2C Master write multi bytes data to Slave. | |
| * | |
| */ | |
| uint32_t I2C_WriteMultiBytes(I2C_T *i2c, uint8_t u8SlaveAddr, uint8_t au8Data[], uint32_t u32wLen) | |
| { | |
| uint8_t u8Xfering = 1u, u8Err = 0u, u8Ctrl = 0u; | |
| uint32_t u32txLen = 0u; | |
| I2C_START(i2c); /* Send START */ | |
| while(u8Xfering && (u8Err == 0u)) | |
| { | |
| I2C_WAIT_READY(i2c) {} | |
| switch(I2C_GET_STATUS(i2c)) | |
| { | |
| case 0x08u: | |
| I2C_SET_DATA(i2c, (uint8_t)(u8SlaveAddr << 1u | 0x00u)); /* Write SLA+W to Register I2CDAT */ | |
| u8Ctrl = I2C_CTL_SI; /* Clear SI */ | |
| break; | |
| case 0x18u: /* Slave Address ACK */ | |
| case 0x28u: | |
| if(u32txLen < u32wLen) | |
| { | |
| I2C_SET_DATA(i2c, au8Data[u32txLen++]); /* Write Data to I2CDAT */ | |
| } | |
| else | |
| { | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Xfering = 0u; | |
| } | |
| break; | |
| case 0x20u: /* Slave Address NACK */ | |
| case 0x30u: /* Master transmit data NACK */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| case 0x38u: /* Arbitration Lost */ | |
| default: /* Unknow status */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| } | |
| I2C_SET_CONTROL_REG(i2c, u8Ctrl); /* Write controlbit to I2C_CTL register */ | |
| } | |
| return u32txLen; /* Return bytes length that have been transmitted */ | |
| } | |
| /** | |
| * @brief Specify a byte register address and write a byte to Slave | |
| * | |
| * @param[in] *i2c Point to I2C peripheral | |
| * @param[in] u8SlaveAddr Access Slave address(7-bit) | |
| * @param[in] u8DataAddr Specify a address (1 byte) of data write to | |
| * @param[in] u8Data A byte data to write it to Slave | |
| * | |
| * @retval 0 Write data success | |
| * @retval 1 Write data fail, or bus occurs error events | |
| * | |
| * @details The function is used for I2C Master specify a address that data write to in Slave. | |
| * | |
| */ | |
| uint8_t I2C_WriteByteOneReg(I2C_T *i2c, uint8_t u8SlaveAddr, uint8_t u8DataAddr, uint8_t u8Data) | |
| { | |
| uint8_t u8Xfering = 1u, u8Err = 0u, u8Ctrl = 0u; | |
| uint32_t u32txLen = 0u; | |
| I2C_START(i2c); /* Send START */ | |
| while(u8Xfering && (u8Err == 0u)) | |
| { | |
| I2C_WAIT_READY(i2c) {} | |
| switch(I2C_GET_STATUS(i2c)) | |
| { | |
| case 0x08u: | |
| I2C_SET_DATA(i2c, (uint8_t)(u8SlaveAddr << 1u | 0x00u)); /* Send Slave address with write bit */ | |
| u8Ctrl = I2C_CTL_SI; /* Clear SI */ | |
| break; | |
| case 0x18u: /* Slave Address ACK */ | |
| I2C_SET_DATA(i2c, u8DataAddr); /* Write Lo byte address of register */ | |
| break; | |
| case 0x20u: /* Slave Address NACK */ | |
| case 0x30u: /* Master transmit data NACK */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| case 0x28u: | |
| if(u32txLen < 1u) | |
| { | |
| I2C_SET_DATA(i2c, u8Data); | |
| u32txLen++; | |
| } | |
| else | |
| { | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Xfering = 0u; | |
| } | |
| break; | |
| case 0x38u: /* Arbitration Lost */ | |
| default: /* Unknow status */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| } | |
| I2C_SET_CONTROL_REG(i2c, u8Ctrl); /* Write controlbit to I2C_CTL register */ | |
| } | |
| return (u8Err | u8Xfering); /* return (Success)/(Fail) status */ | |
| } | |
| /** | |
| * @brief Specify a byte register address and write multi bytes to Slave | |
| * | |
| * @param[in] *i2c Point to I2C peripheral | |
| * @param[in] u8SlaveAddr Access Slave address(7-bit) | |
| * @param[in] u8DataAddr Specify a address (1 byte) of data write to | |
| * @param[in] *au8Data Pointer to array to write data to Slave | |
| * @param[in] u32wLen How many bytes need to write to Slave | |
| * | |
| * @return A length of how many bytes have been transmitted. | |
| * | |
| * @details The function is used for I2C Master specify a byte address that multi data bytes write to in Slave. | |
| * | |
| */ | |
| uint32_t I2C_WriteMultiBytesOneReg(I2C_T *i2c, uint8_t u8SlaveAddr, uint8_t u8DataAddr, uint8_t au8Data[], uint32_t u32wLen) | |
| { | |
| uint8_t u8Xfering = 1u, u8Err = 0u, u8Ctrl = 0u; | |
| uint32_t u32txLen = 0u; | |
| I2C_START(i2c); /* Send START */ | |
| while(u8Xfering && (u8Err == 0u)) | |
| { | |
| I2C_WAIT_READY(i2c) {} | |
| switch(I2C_GET_STATUS(i2c)) | |
| { | |
| case 0x08u: | |
| I2C_SET_DATA(i2c, (uint8_t)(u8SlaveAddr << 1u | 0x00u)); /* Write SLA+W to Register I2CDAT */ | |
| u8Ctrl = I2C_CTL_SI; | |
| break; | |
| case 0x18u: /* Slave Address ACK */ | |
| I2C_SET_DATA(i2c, u8DataAddr); /* Write Lo byte address of register */ | |
| break; | |
| case 0x20u: /* Slave Address NACK */ | |
| case 0x30u: /* Master transmit data NACK */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| case 0x28u: | |
| if(u32txLen < u32wLen) | |
| { | |
| I2C_SET_DATA(i2c, au8Data[u32txLen++]); | |
| } | |
| else | |
| { | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Xfering = 0u; | |
| } | |
| break; | |
| case 0x38u: /* Arbitration Lost */ | |
| default: /* Unknow status */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| } | |
| I2C_SET_CONTROL_REG(i2c, u8Ctrl); /* Write controlbit to I2C_CTL register */ | |
| } | |
| return u32txLen; /* Return bytes length that have been transmitted */ | |
| } | |
| /** | |
| * @brief Specify two bytes register address and Write a byte to Slave | |
| * | |
| * @param[in] *i2c Point to I2C peripheral | |
| * @param[in] u8SlaveAddr Access Slave address(7-bit) | |
| * @param[in] u16DataAddr Specify a address (2 byte) of data write to | |
| * @param[in] u8Data Write a byte data to Slave | |
| * | |
| * @retval 0 Write data success | |
| * @retval 1 Write data fail, or bus occurs error events | |
| * | |
| * @details The function is used for I2C Master specify two bytes address that data write to in Slave. | |
| * | |
| */ | |
| uint8_t I2C_WriteByteTwoRegs(I2C_T *i2c, uint8_t u8SlaveAddr, uint16_t u16DataAddr, uint8_t u8Data) | |
| { | |
| uint8_t u8Xfering = 1u, u8Err = 0u, u8Addr = 1u, u8Ctrl = 0u; | |
| uint32_t u32txLen = 0u; | |
| I2C_START(i2c); /* Send START */ | |
| while(u8Xfering && (u8Err == 0u)) | |
| { | |
| I2C_WAIT_READY(i2c) {} | |
| switch(I2C_GET_STATUS(i2c)) | |
| { | |
| case 0x08u: | |
| I2C_SET_DATA(i2c, (uint8_t)(u8SlaveAddr << 1u | 0x00u)); /* Write SLA+W to Register I2CDAT */ | |
| u8Ctrl = I2C_CTL_SI; /* Clear SI */ | |
| break; | |
| case 0x18u: /* Slave Address ACK */ | |
| I2C_SET_DATA(i2c, (uint8_t)((u16DataAddr & 0xFF00u) >> 8u)); /* Write Hi byte address of register */ | |
| break; | |
| case 0x20u: /* Slave Address NACK */ | |
| case 0x30u: /* Master transmit data NACK */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| case 0x28u: | |
| if(u8Addr) | |
| { | |
| I2C_SET_DATA(i2c, (uint8_t)(u16DataAddr & 0xFFu)); /* Write Lo byte address of register */ | |
| u8Addr = 0u; | |
| } | |
| else if((u32txLen < 1u) && (u8Addr == 0u)) | |
| { | |
| I2C_SET_DATA(i2c, u8Data); | |
| u32txLen++; | |
| } | |
| else | |
| { | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Xfering = 0u; | |
| } | |
| break; | |
| case 0x38u: /* Arbitration Lost */ | |
| default: /* Unknow status */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| } | |
| I2C_SET_CONTROL_REG(i2c, u8Ctrl); /* Write controlbit to I2C_CTL register */ | |
| } | |
| return (u8Err | u8Xfering); /* return (Success)/(Fail) status */ | |
| } | |
| /** | |
| * @brief Specify two bytes register address and write multi bytes to Slave | |
| * | |
| * @param[in] *i2c Point to I2C peripheral | |
| * @param[in] u8SlaveAddr Access Slave address(7-bit) | |
| * @param[in] u16DataAddr Specify a address (2 bytes) of data write to | |
| * @param[in] au8Data[] A data array for write data to Slave | |
| * @param[in] u32wLen How many bytes need to write to Slave | |
| * | |
| * @return A length of how many bytes have been transmitted. | |
| * | |
| * @details The function is used for I2C Master specify a byte address that multi data write to in Slave. | |
| * | |
| */ | |
| uint32_t I2C_WriteMultiBytesTwoRegs(I2C_T *i2c, uint8_t u8SlaveAddr, uint16_t u16DataAddr, uint8_t au8Data[], uint32_t u32wLen) | |
| { | |
| uint8_t u8Xfering = 1u, u8Err = 0u, u8Addr = 1u, u8Ctrl = 0u; | |
| uint32_t u32txLen = 0u; | |
| I2C_START(i2c); /* Send START */ | |
| while(u8Xfering && (u8Err == 0u)) | |
| { | |
| I2C_WAIT_READY(i2c) {} | |
| switch(I2C_GET_STATUS(i2c)) | |
| { | |
| case 0x08u: | |
| I2C_SET_DATA(i2c, (uint8_t)(u8SlaveAddr << 1u | 0x00u)); /* Write SLA+W to Register I2CDAT */ | |
| u8Ctrl = I2C_CTL_SI; /* Clear SI */ | |
| break; | |
| case 0x18u: /* Slave Address ACK */ | |
| I2C_SET_DATA(i2c, (uint8_t)((u16DataAddr & 0xFF00u) >> 8u)); /* Write Hi byte address of register */ | |
| break; | |
| case 0x20u: /* Slave Address NACK */ | |
| case 0x30u: /* Master transmit data NACK */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| case 0x28u: | |
| if(u8Addr) | |
| { | |
| I2C_SET_DATA(i2c, (uint8_t)(u16DataAddr & 0xFFu)); /* Write Lo byte address of register */ | |
| u8Addr = 0u; | |
| } | |
| else if((u32txLen < u32wLen) && (u8Addr == 0u)) | |
| { | |
| I2C_SET_DATA(i2c, au8Data[u32txLen++]); /* Write data to Register I2CDAT*/ | |
| } | |
| else | |
| { | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Xfering = 0u; | |
| } | |
| break; | |
| case 0x38u: /* Arbitration Lost */ | |
| default: /* Unknow status */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| } | |
| I2C_SET_CONTROL_REG(i2c, u8Ctrl); /* Write controlbit to I2C_CTL register */ | |
| } | |
| return u32txLen; /* Return bytes length that have been transmitted */ | |
| } | |
| /** | |
| * @brief Read a byte from Slave | |
| * | |
| * @param[in] *i2c Point to I2C peripheral | |
| * @param[in] u8SlaveAddr Access Slave address(7-bit) | |
| * | |
| * @return Read a byte data from Slave | |
| * | |
| * @details The function is used for I2C Master to read a byte data from Slave. | |
| * | |
| */ | |
| uint8_t I2C_ReadByte(I2C_T *i2c, uint8_t u8SlaveAddr) | |
| { | |
| uint8_t u8Xfering = 1u, u8Err = 0u, rdata = 0u, u8Ctrl = 0u; | |
| I2C_START(i2c); /* Send START */ | |
| while(u8Xfering && (u8Err == 0u)) | |
| { | |
| I2C_WAIT_READY(i2c) {} | |
| switch(I2C_GET_STATUS(i2c)) | |
| { | |
| case 0x08u: | |
| I2C_SET_DATA(i2c, (uint8_t)((u8SlaveAddr << 1u) | 0x01u)); /* Write SLA+R to Register I2CDAT */ | |
| u8Ctrl = I2C_CTL_SI; /* Clear SI */ | |
| break; | |
| case 0x40u: /* Slave Address ACK */ | |
| u8Ctrl = I2C_CTL_SI; /* Clear SI */ | |
| break; | |
| case 0x48u: /* Slave Address NACK */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| case 0x58u: | |
| rdata = (unsigned char) I2C_GET_DATA(i2c); /* Receive Data */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Xfering = 0u; | |
| break; | |
| case 0x38u: /* Arbitration Lost */ | |
| default: /* Unknow status */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| } | |
| I2C_SET_CONTROL_REG(i2c, u8Ctrl); /* Write controlbit to I2C_CTL register */ | |
| } | |
| if(u8Err) | |
| { | |
| rdata = 0u; /* If occurs error, return 0 */ | |
| } | |
| return rdata; /* Return read data */ | |
| } | |
| /** | |
| * @brief Read multi bytes from Slave | |
| * | |
| * @param[in] *i2c Point to I2C peripheral | |
| * @param[in] u8SlaveAddr Access Slave address(7-bit) | |
| * @param[out] au8Rdata[] A data array to store data from Slave | |
| * @param[in] u32rLen How many bytes need to read from Slave | |
| * | |
| * @return A length of how many bytes have been received | |
| * | |
| * @details The function is used for I2C Master to read multi data bytes from Slave. | |
| * | |
| * | |
| */ | |
| uint32_t I2C_ReadMultiBytes(I2C_T *i2c, uint8_t u8SlaveAddr, uint8_t au8Rdata[], uint32_t u32rLen) | |
| { | |
| uint8_t u8Xfering = 1u, u8Err = 0u, u8Ctrl = 0u; | |
| uint32_t u32rxLen = 0u; | |
| I2C_START(i2c); /* Send START */ | |
| while(u8Xfering && (u8Err == 0u)) | |
| { | |
| I2C_WAIT_READY(i2c) {} | |
| switch(I2C_GET_STATUS(i2c)) | |
| { | |
| case 0x08u: | |
| I2C_SET_DATA(i2c, (uint8_t)((u8SlaveAddr << 1u) | 0x01u)); /* Write SLA+R to Register I2CDAT */ | |
| u8Ctrl = I2C_CTL_SI; /* Clear SI */ | |
| break; | |
| case 0x40u: /* Slave Address ACK */ | |
| u8Ctrl = I2C_CTL_SI_AA; /* Clear SI and set ACK */ | |
| break; | |
| case 0x48u: /* Slave Address NACK */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| case 0x50u: | |
| au8Rdata[u32rxLen++] = (unsigned char) I2C_GET_DATA(i2c); /* Receive Data */ | |
| if(u32rxLen < (u32rLen - 1u)) | |
| { | |
| u8Ctrl = I2C_CTL_SI_AA; /* Clear SI and set ACK */ | |
| } | |
| else | |
| { | |
| u8Ctrl = I2C_CTL_SI; /* Clear SI */ | |
| } | |
| break; | |
| case 0x58u: | |
| au8Rdata[u32rxLen++] = (unsigned char) I2C_GET_DATA(i2c); /* Receive Data */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Xfering = 0u; | |
| break; | |
| case 0x38u: /* Arbitration Lost */ | |
| default: /* Unknow status */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| } | |
| I2C_SET_CONTROL_REG(i2c, u8Ctrl); /* Write controlbit to I2C_CTL register */ | |
| } | |
| return u32rxLen; /* Return bytes length that have been received */ | |
| } | |
| /** | |
| * @brief Specify a byte register address and read a byte from Slave | |
| * | |
| * @param[in] *i2c Point to I2C peripheral | |
| * @param[in] u8SlaveAddr Access Slave address(7-bit) | |
| * @param[in] u8DataAddr Specify a address(1 byte) of data read from | |
| * | |
| * @return Read a byte data from Slave | |
| * | |
| * @details The function is used for I2C Master specify a byte address that a data byte read from Slave. | |
| * | |
| * | |
| */ | |
| uint8_t I2C_ReadByteOneReg(I2C_T *i2c, uint8_t u8SlaveAddr, uint8_t u8DataAddr) | |
| { | |
| uint8_t u8Xfering = 1u, u8Err = 0u, u8Rdata = 0u, u8Ctrl = 0u; | |
| I2C_START(i2c); /* Send START */ | |
| while(u8Xfering && (u8Err == 0u)) | |
| { | |
| I2C_WAIT_READY(i2c) {} | |
| switch(I2C_GET_STATUS(i2c)) | |
| { | |
| case 0x08u: | |
| I2C_SET_DATA(i2c, (uint8_t)(u8SlaveAddr << 1u | 0x00u)); /* Write SLA+W to Register I2CDAT */ | |
| u8Ctrl = I2C_CTL_SI; /* Clear SI */ | |
| break; | |
| case 0x18u: /* Slave Address ACK */ | |
| I2C_SET_DATA(i2c, u8DataAddr); /* Write Lo byte address of register */ | |
| break; | |
| case 0x20u: /* Slave Address NACK */ | |
| case 0x30u: /* Master transmit data NACK */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| case 0x28u: | |
| u8Ctrl = I2C_CTL_STA_SI; /* Send repeat START */ | |
| break; | |
| case 0x10u: | |
| I2C_SET_DATA(i2c, (uint8_t)((u8SlaveAddr << 1u) | 0x01u)); /* Write SLA+R to Register I2CDAT */ | |
| u8Ctrl = I2C_CTL_SI; /* Clear SI */ | |
| break; | |
| case 0x40u: /* Slave Address ACK */ | |
| u8Ctrl = I2C_CTL_SI; /* Clear SI */ | |
| break; | |
| case 0x48u: /* Slave Address NACK */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| case 0x58u: | |
| u8Rdata = (uint8_t) I2C_GET_DATA(i2c); /* Receive Data */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Xfering = 0u; | |
| break; | |
| case 0x38u: /* Arbitration Lost */ | |
| default: /* Unknow status */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| } | |
| I2C_SET_CONTROL_REG(i2c, u8Ctrl); /* Write controlbit to I2C_CTL register */ | |
| } | |
| if(u8Err) | |
| { | |
| u8Rdata = 0u; /* If occurs error, return 0 */ | |
| } | |
| return u8Rdata; /* Return read data */ | |
| } | |
| /** | |
| * @brief Specify a byte register address and read multi bytes from Slave | |
| * | |
| * @param[in] *i2c Point to I2C peripheral | |
| * @param[in] u8SlaveAddr Access Slave address(7-bit) | |
| * @param[in] u8DataAddr Specify a address (1 bytes) of data read from | |
| * @param[out] au8Rdata[] A data array to store data from Slave | |
| * @param[in] u32rLen How many bytes need to read from Slave | |
| * | |
| * @return A length of how many bytes have been received | |
| * | |
| * @details The function is used for I2C Master specify a byte address that multi data bytes read from Slave. | |
| * | |
| * | |
| */ | |
| uint32_t I2C_ReadMultiBytesOneReg(I2C_T *i2c, uint8_t u8SlaveAddr, uint8_t u8DataAddr, uint8_t au8Rdata[], uint32_t u32rLen) | |
| { | |
| uint8_t u8Xfering = 1u, u8Err = 0u, u8Ctrl = 0u; | |
| uint32_t u32rxLen = 0u; | |
| I2C_START(i2c); /* Send START */ | |
| while(u8Xfering && (u8Err == 0u)) | |
| { | |
| I2C_WAIT_READY(i2c) {} | |
| switch(I2C_GET_STATUS(i2c)) | |
| { | |
| case 0x08u: | |
| I2C_SET_DATA(i2c, (uint8_t)(u8SlaveAddr << 1u | 0x00u)); /* Write SLA+W to Register I2CDAT */ | |
| u8Ctrl = I2C_CTL_SI; /* Clear SI */ | |
| break; | |
| case 0x18u: /* Slave Address ACK */ | |
| I2C_SET_DATA(i2c, u8DataAddr); /* Write Lo byte address of register */ | |
| break; | |
| case 0x20u: /* Slave Address NACK */ | |
| case 0x30u: /* Master transmit data NACK */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| case 0x28u: | |
| u8Ctrl = I2C_CTL_STA_SI; /* Send repeat START */ | |
| break; | |
| case 0x10u: | |
| I2C_SET_DATA(i2c, (uint8_t)((u8SlaveAddr << 1u) | 0x01u)); /* Write SLA+R to Register I2CDAT */ | |
| u8Ctrl = I2C_CTL_SI; /* Clear SI */ | |
| break; | |
| case 0x40u: /* Slave Address ACK */ | |
| u8Ctrl = I2C_CTL_SI_AA; /* Clear SI and set ACK */ | |
| break; | |
| case 0x48u: /* Slave Address NACK */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| case 0x50u: | |
| au8Rdata[u32rxLen++] = (uint8_t) I2C_GET_DATA(i2c); /* Receive Data */ | |
| if(u32rxLen < (u32rLen - 1u)) | |
| { | |
| u8Ctrl = I2C_CTL_SI_AA; /* Clear SI and set ACK */ | |
| } | |
| else | |
| { | |
| u8Ctrl = I2C_CTL_SI; /* Clear SI */ | |
| } | |
| break; | |
| case 0x58u: | |
| au8Rdata[u32rxLen++] = (uint8_t) I2C_GET_DATA(i2c); /* Receive Data */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Xfering = 0u; | |
| break; | |
| case 0x38u: /* Arbitration Lost */ | |
| default: /* Unknow status */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| } | |
| I2C_SET_CONTROL_REG(i2c, u8Ctrl); /* Write controlbit to I2C_CTL register */ | |
| } | |
| return u32rxLen; /* Return bytes length that have been received */ | |
| } | |
| /** | |
| * @brief Specify two bytes register address and read a byte from Slave | |
| * | |
| * @param[in] *i2c Point to I2C peripheral | |
| * @param[in] u8SlaveAddr Access Slave address(7-bit) | |
| * @param[in] u16DataAddr Specify an address(2 bytes) of data read from | |
| * | |
| * @return Read a byte data from Slave | |
| * | |
| * @details The function is used for I2C Master specify two bytes address that a data byte read from Slave. | |
| * | |
| * | |
| */ | |
| uint8_t I2C_ReadByteTwoRegs(I2C_T *i2c, uint8_t u8SlaveAddr, uint16_t u16DataAddr) | |
| { | |
| uint8_t u8Xfering = 1u, u8Err = 0u, u8Rdata = 0u, u8Addr = 1u, u8Ctrl = 0u; | |
| I2C_START(i2c); /* Send START */ | |
| while(u8Xfering && (u8Err == 0u)) | |
| { | |
| I2C_WAIT_READY(i2c) {} | |
| switch(I2C_GET_STATUS(i2c)) | |
| { | |
| case 0x08u: | |
| I2C_SET_DATA(i2c, (uint8_t)(u8SlaveAddr << 1u | 0x00u)); /* Write SLA+W to Register I2CDAT */ | |
| u8Ctrl = I2C_CTL_SI; /* Clear SI */ | |
| break; | |
| case 0x18u: /* Slave Address ACK */ | |
| I2C_SET_DATA(i2c, (uint8_t)((u16DataAddr & 0xFF00u) >> 8u)); /* Write Hi byte address of register */ | |
| break; | |
| case 0x20u: /* Slave Address NACK */ | |
| case 0x30u: /* Master transmit data NACK */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| case 0x28u: | |
| if(u8Addr) | |
| { | |
| I2C_SET_DATA(i2c, (uint8_t)(u16DataAddr & 0xFFu)); /* Write Lo byte address of register */ | |
| u8Addr = 0u; | |
| } | |
| else | |
| { | |
| u8Ctrl = I2C_CTL_STA_SI; /* Clear SI and send repeat START */ | |
| } | |
| break; | |
| case 0x10u: | |
| I2C_SET_DATA(i2c, (uint8_t)((u8SlaveAddr << 1u) | 0x01u)); /* Write SLA+R to Register I2CDAT */ | |
| u8Ctrl = I2C_CTL_SI; /* Clear SI */ | |
| break; | |
| case 0x40u: /* Slave Address ACK */ | |
| u8Ctrl = I2C_CTL_SI; /* Clear SI */ | |
| break; | |
| case 0x48u: /* Slave Address NACK */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| case 0x58u: | |
| u8Rdata = (unsigned char) I2C_GET_DATA(i2c); /* Receive Data */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Xfering = 0u; | |
| break; | |
| case 0x38u: /* Arbitration Lost */ | |
| default: /* Unknow status */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| } | |
| I2C_SET_CONTROL_REG(i2c, u8Ctrl); /* Write controlbit to I2C_CTL register */ | |
| } | |
| if(u8Err) | |
| { | |
| u8Rdata = 0u; /* If occurs error, return 0 */ | |
| } | |
| return u8Rdata; /* Return read data */ | |
| } | |
| /** | |
| * @brief Specify two bytes register address and read multi bytes from Slave | |
| * | |
| * @param[in] *i2c Point to I2C peripheral | |
| * @param[in] u8SlaveAddr Access Slave address(7-bit) | |
| * @param[in] u16DataAddr Specify a address (2 bytes) of data read from | |
| * @param[out] au8Rdata[] A data array to store data from Slave | |
| * @param[in] u32rLen How many bytes need to read from Slave | |
| * | |
| * @return A length of how many bytes have been received | |
| * | |
| * @details The function is used for I2C Master specify two bytes address that multi data bytes read from Slave. | |
| * | |
| * | |
| */ | |
| uint32_t I2C_ReadMultiBytesTwoRegs(I2C_T *i2c, uint8_t u8SlaveAddr, uint16_t u16DataAddr, uint8_t au8Rdata[], uint32_t u32rLen) | |
| { | |
| uint8_t u8Xfering = 1u, u8Err = 0u, u8Addr = 1u, u8Ctrl = 0u; | |
| uint32_t u32rxLen = 0u; | |
| I2C_START(i2c); /* Send START */ | |
| while(u8Xfering && (u8Err == 0u)) | |
| { | |
| I2C_WAIT_READY(i2c) {} | |
| switch(I2C_GET_STATUS(i2c)) | |
| { | |
| case 0x08u: | |
| I2C_SET_DATA(i2c, (uint8_t)(u8SlaveAddr << 1u | 0x00u)); /* Write SLA+W to Register I2CDAT */ | |
| u8Ctrl = I2C_CTL_SI; /* Clear SI */ | |
| break; | |
| case 0x18u: /* Slave Address ACK */ | |
| I2C_SET_DATA(i2c, (uint8_t)((u16DataAddr & 0xFF00u) >> 8u)); /* Write Hi byte address of register */ | |
| break; | |
| case 0x20u: /* Slave Address NACK */ | |
| case 0x30u: /* Master transmit data NACK */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| case 0x28u: | |
| if(u8Addr) | |
| { | |
| I2C_SET_DATA(i2c, (uint8_t)(u16DataAddr & 0xFFu)); /* Write Lo byte address of register */ | |
| u8Addr = 0u; | |
| } | |
| else | |
| { | |
| u8Ctrl = I2C_CTL_STA_SI; /* Clear SI and send repeat START */ | |
| } | |
| break; | |
| case 0x10u: | |
| I2C_SET_DATA(i2c, (uint8_t)((u8SlaveAddr << 1u) | 0x01u)); /* Write SLA+R to Register I2CDAT */ | |
| u8Ctrl = I2C_CTL_SI; /* Clear SI */ | |
| break; | |
| case 0x40u: /* Slave Address ACK */ | |
| u8Ctrl = I2C_CTL_SI_AA; /* Clear SI and set ACK */ | |
| break; | |
| case 0x48u: /* Slave Address NACK */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| case 0x50u: | |
| au8Rdata[u32rxLen++] = (unsigned char) I2C_GET_DATA(i2c); /* Receive Data */ | |
| if(u32rxLen < (u32rLen - 1u)) | |
| { | |
| u8Ctrl = I2C_CTL_SI_AA; /* Clear SI and set ACK */ | |
| } | |
| else | |
| { | |
| u8Ctrl = I2C_CTL_SI; /* Clear SI */ | |
| } | |
| break; | |
| case 0x58u: | |
| au8Rdata[u32rxLen++] = (unsigned char) I2C_GET_DATA(i2c); /* Receive Data */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Xfering = 0u; | |
| break; | |
| case 0x38u: /* Arbitration Lost */ | |
| default: /* Unknow status */ | |
| u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */ | |
| u8Err = 1u; | |
| break; | |
| } | |
| I2C_SET_CONTROL_REG(i2c, u8Ctrl); /* Write controlbit to I2C_CTL register */ | |
| } | |
| return u32rxLen; /* Return bytes length that have been received */ | |
| } | |
| /*@}*/ /* end of group I2C_EXPORTED_FUNCTIONS */ | |
| /*@}*/ /* end of group I2C_Driver */ | |
| /*@}*/ /* end of group Standard_Driver */ | |
| /*** (C) COPYRIGHT 2016 Nuvoton Technology Corp. ***/ |