Mouse code for the MacroRat
mbed-dev/targets/TARGET_NUVOTON/TARGET_M451/device/StdDriver/m451_i2c.c@18:6a4db94011d3, 2017-05-14 (annotated)
- Committer:
- sahilmgandhi
- Date:
- Sun May 14 23:18:57 2017 +0000
- Revision:
- 18:6a4db94011d3
Publishing again
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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sahilmgandhi | 18:6a4db94011d3 | 1 | /**************************************************************************//** |
sahilmgandhi | 18:6a4db94011d3 | 2 | * @file i2c.c |
sahilmgandhi | 18:6a4db94011d3 | 3 | * @version V3.00 |
sahilmgandhi | 18:6a4db94011d3 | 4 | * $Revision: 23 $ |
sahilmgandhi | 18:6a4db94011d3 | 5 | * $Date: 15/08/11 10:26a $ |
sahilmgandhi | 18:6a4db94011d3 | 6 | * @brief M451 series I2C driver source file |
sahilmgandhi | 18:6a4db94011d3 | 7 | * |
sahilmgandhi | 18:6a4db94011d3 | 8 | * @note |
sahilmgandhi | 18:6a4db94011d3 | 9 | * Copyright (C) 2014~2015 Nuvoton Technology Corp. All rights reserved. |
sahilmgandhi | 18:6a4db94011d3 | 10 | *****************************************************************************/ |
sahilmgandhi | 18:6a4db94011d3 | 11 | #include "M451Series.h" |
sahilmgandhi | 18:6a4db94011d3 | 12 | |
sahilmgandhi | 18:6a4db94011d3 | 13 | /** @addtogroup Standard_Driver Standard Driver |
sahilmgandhi | 18:6a4db94011d3 | 14 | @{ |
sahilmgandhi | 18:6a4db94011d3 | 15 | */ |
sahilmgandhi | 18:6a4db94011d3 | 16 | |
sahilmgandhi | 18:6a4db94011d3 | 17 | /** @addtogroup I2C_Driver I2C Driver |
sahilmgandhi | 18:6a4db94011d3 | 18 | @{ |
sahilmgandhi | 18:6a4db94011d3 | 19 | */ |
sahilmgandhi | 18:6a4db94011d3 | 20 | |
sahilmgandhi | 18:6a4db94011d3 | 21 | |
sahilmgandhi | 18:6a4db94011d3 | 22 | /** @addtogroup I2C_EXPORTED_FUNCTIONS I2C Exported Functions |
sahilmgandhi | 18:6a4db94011d3 | 23 | @{ |
sahilmgandhi | 18:6a4db94011d3 | 24 | */ |
sahilmgandhi | 18:6a4db94011d3 | 25 | |
sahilmgandhi | 18:6a4db94011d3 | 26 | /** |
sahilmgandhi | 18:6a4db94011d3 | 27 | * @brief Enable specify I2C Controller and set Clock Divider |
sahilmgandhi | 18:6a4db94011d3 | 28 | * |
sahilmgandhi | 18:6a4db94011d3 | 29 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 30 | * @param[in] u32BusClock The target I2C bus clock in Hz |
sahilmgandhi | 18:6a4db94011d3 | 31 | * |
sahilmgandhi | 18:6a4db94011d3 | 32 | * @return Actual I2C bus clock frequency |
sahilmgandhi | 18:6a4db94011d3 | 33 | * |
sahilmgandhi | 18:6a4db94011d3 | 34 | * @details The function enable the specify I2C Controller and set proper Clock Divider |
sahilmgandhi | 18:6a4db94011d3 | 35 | * in I2C CLOCK DIVIDED REGISTER (I2CLK) according to the target I2C Bus clock. |
sahilmgandhi | 18:6a4db94011d3 | 36 | * I2C Bus clock = PCLK / (4*(divider+1). |
sahilmgandhi | 18:6a4db94011d3 | 37 | * |
sahilmgandhi | 18:6a4db94011d3 | 38 | */ |
sahilmgandhi | 18:6a4db94011d3 | 39 | uint32_t I2C_Open(I2C_T *i2c, uint32_t u32BusClock) |
sahilmgandhi | 18:6a4db94011d3 | 40 | { |
sahilmgandhi | 18:6a4db94011d3 | 41 | uint32_t u32Div; |
sahilmgandhi | 18:6a4db94011d3 | 42 | |
sahilmgandhi | 18:6a4db94011d3 | 43 | u32Div = (uint32_t)(((SystemCoreClock * 10) / (u32BusClock * 4) + 5) / 10 - 1); /* Compute proper divider for I2C clock */ |
sahilmgandhi | 18:6a4db94011d3 | 44 | i2c->CLKDIV = u32Div; |
sahilmgandhi | 18:6a4db94011d3 | 45 | |
sahilmgandhi | 18:6a4db94011d3 | 46 | /* Enable I2C */ |
sahilmgandhi | 18:6a4db94011d3 | 47 | i2c->CTL |= I2C_CTL_I2CEN_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 48 | |
sahilmgandhi | 18:6a4db94011d3 | 49 | return (SystemCoreClock / ((u32Div + 1) << 2)); |
sahilmgandhi | 18:6a4db94011d3 | 50 | } |
sahilmgandhi | 18:6a4db94011d3 | 51 | |
sahilmgandhi | 18:6a4db94011d3 | 52 | /** |
sahilmgandhi | 18:6a4db94011d3 | 53 | * @brief Disable specify I2C Controller |
sahilmgandhi | 18:6a4db94011d3 | 54 | * |
sahilmgandhi | 18:6a4db94011d3 | 55 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 56 | * |
sahilmgandhi | 18:6a4db94011d3 | 57 | * @return None |
sahilmgandhi | 18:6a4db94011d3 | 58 | * |
sahilmgandhi | 18:6a4db94011d3 | 59 | * @details Reset I2C Controller and disable specify I2C port. |
sahilmgandhi | 18:6a4db94011d3 | 60 | * |
sahilmgandhi | 18:6a4db94011d3 | 61 | */ |
sahilmgandhi | 18:6a4db94011d3 | 62 | |
sahilmgandhi | 18:6a4db94011d3 | 63 | void I2C_Close(I2C_T *i2c) |
sahilmgandhi | 18:6a4db94011d3 | 64 | { |
sahilmgandhi | 18:6a4db94011d3 | 65 | /* Reset I2C Controller */ |
sahilmgandhi | 18:6a4db94011d3 | 66 | if((uint32_t)i2c == I2C0_BASE) |
sahilmgandhi | 18:6a4db94011d3 | 67 | { |
sahilmgandhi | 18:6a4db94011d3 | 68 | SYS->IPRST1 |= SYS_IPRST1_I2C0RST_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 69 | SYS->IPRST1 &= ~SYS_IPRST1_I2C0RST_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 70 | } |
sahilmgandhi | 18:6a4db94011d3 | 71 | else if((uint32_t)i2c == I2C1_BASE) |
sahilmgandhi | 18:6a4db94011d3 | 72 | { |
sahilmgandhi | 18:6a4db94011d3 | 73 | SYS->IPRST1 |= SYS_IPRST1_I2C1RST_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 74 | SYS->IPRST1 &= ~SYS_IPRST1_I2C1RST_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 75 | } |
sahilmgandhi | 18:6a4db94011d3 | 76 | |
sahilmgandhi | 18:6a4db94011d3 | 77 | /* Disable I2C */ |
sahilmgandhi | 18:6a4db94011d3 | 78 | i2c->CTL &= ~I2C_CTL_I2CEN_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 79 | } |
sahilmgandhi | 18:6a4db94011d3 | 80 | |
sahilmgandhi | 18:6a4db94011d3 | 81 | /** |
sahilmgandhi | 18:6a4db94011d3 | 82 | * @brief Clear Time-out Counter flag |
sahilmgandhi | 18:6a4db94011d3 | 83 | * |
sahilmgandhi | 18:6a4db94011d3 | 84 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 85 | * |
sahilmgandhi | 18:6a4db94011d3 | 86 | * @return None |
sahilmgandhi | 18:6a4db94011d3 | 87 | * |
sahilmgandhi | 18:6a4db94011d3 | 88 | * @details When Time-out flag will be set, use this function to clear I2C Bus Time-out counter flag . |
sahilmgandhi | 18:6a4db94011d3 | 89 | * |
sahilmgandhi | 18:6a4db94011d3 | 90 | */ |
sahilmgandhi | 18:6a4db94011d3 | 91 | void I2C_ClearTimeoutFlag(I2C_T *i2c) |
sahilmgandhi | 18:6a4db94011d3 | 92 | { |
sahilmgandhi | 18:6a4db94011d3 | 93 | i2c->TOCTL |= I2C_TOCTL_TOIF_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 94 | } |
sahilmgandhi | 18:6a4db94011d3 | 95 | |
sahilmgandhi | 18:6a4db94011d3 | 96 | /** |
sahilmgandhi | 18:6a4db94011d3 | 97 | * @brief Set Control bit of I2C Controller |
sahilmgandhi | 18:6a4db94011d3 | 98 | * |
sahilmgandhi | 18:6a4db94011d3 | 99 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 100 | * @param[in] u8Start Set I2C START condition |
sahilmgandhi | 18:6a4db94011d3 | 101 | * @param[in] u8Stop Set I2C STOP condition |
sahilmgandhi | 18:6a4db94011d3 | 102 | * @param[in] u8Si Clear SI flag |
sahilmgandhi | 18:6a4db94011d3 | 103 | * @param[in] u8Ack Set I2C ACK bit |
sahilmgandhi | 18:6a4db94011d3 | 104 | * |
sahilmgandhi | 18:6a4db94011d3 | 105 | * @return None |
sahilmgandhi | 18:6a4db94011d3 | 106 | * |
sahilmgandhi | 18:6a4db94011d3 | 107 | * @details The function set I2C Control bit of I2C Bus protocol. |
sahilmgandhi | 18:6a4db94011d3 | 108 | * |
sahilmgandhi | 18:6a4db94011d3 | 109 | */ |
sahilmgandhi | 18:6a4db94011d3 | 110 | void I2C_Trigger(I2C_T *i2c, uint8_t u8Start, uint8_t u8Stop, uint8_t u8Si, uint8_t u8Ack) |
sahilmgandhi | 18:6a4db94011d3 | 111 | { |
sahilmgandhi | 18:6a4db94011d3 | 112 | uint32_t u32Reg = 0; |
sahilmgandhi | 18:6a4db94011d3 | 113 | |
sahilmgandhi | 18:6a4db94011d3 | 114 | if(u8Start) |
sahilmgandhi | 18:6a4db94011d3 | 115 | u32Reg |= I2C_CTL_STA; |
sahilmgandhi | 18:6a4db94011d3 | 116 | if(u8Stop) |
sahilmgandhi | 18:6a4db94011d3 | 117 | u32Reg |= I2C_CTL_STO; |
sahilmgandhi | 18:6a4db94011d3 | 118 | if(u8Si) |
sahilmgandhi | 18:6a4db94011d3 | 119 | u32Reg |= I2C_CTL_SI; |
sahilmgandhi | 18:6a4db94011d3 | 120 | if(u8Ack) |
sahilmgandhi | 18:6a4db94011d3 | 121 | u32Reg |= I2C_CTL_AA; |
sahilmgandhi | 18:6a4db94011d3 | 122 | |
sahilmgandhi | 18:6a4db94011d3 | 123 | i2c->CTL = (i2c->CTL & ~0x3C) | u32Reg; |
sahilmgandhi | 18:6a4db94011d3 | 124 | } |
sahilmgandhi | 18:6a4db94011d3 | 125 | |
sahilmgandhi | 18:6a4db94011d3 | 126 | /** |
sahilmgandhi | 18:6a4db94011d3 | 127 | * @brief Disable Interrupt of I2C Controller |
sahilmgandhi | 18:6a4db94011d3 | 128 | * |
sahilmgandhi | 18:6a4db94011d3 | 129 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 130 | * |
sahilmgandhi | 18:6a4db94011d3 | 131 | * @return None |
sahilmgandhi | 18:6a4db94011d3 | 132 | * |
sahilmgandhi | 18:6a4db94011d3 | 133 | * @details The function is used for disable I2C interrupt |
sahilmgandhi | 18:6a4db94011d3 | 134 | * |
sahilmgandhi | 18:6a4db94011d3 | 135 | */ |
sahilmgandhi | 18:6a4db94011d3 | 136 | void I2C_DisableInt(I2C_T *i2c) |
sahilmgandhi | 18:6a4db94011d3 | 137 | { |
sahilmgandhi | 18:6a4db94011d3 | 138 | i2c->CTL &= ~I2C_CTL_INTEN_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 139 | } |
sahilmgandhi | 18:6a4db94011d3 | 140 | |
sahilmgandhi | 18:6a4db94011d3 | 141 | /** |
sahilmgandhi | 18:6a4db94011d3 | 142 | * @brief Enable Interrupt of I2C Controller |
sahilmgandhi | 18:6a4db94011d3 | 143 | * |
sahilmgandhi | 18:6a4db94011d3 | 144 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 145 | * |
sahilmgandhi | 18:6a4db94011d3 | 146 | * @return None |
sahilmgandhi | 18:6a4db94011d3 | 147 | * |
sahilmgandhi | 18:6a4db94011d3 | 148 | * @details The function is used for enable I2C interrupt |
sahilmgandhi | 18:6a4db94011d3 | 149 | * |
sahilmgandhi | 18:6a4db94011d3 | 150 | */ |
sahilmgandhi | 18:6a4db94011d3 | 151 | void I2C_EnableInt(I2C_T *i2c) |
sahilmgandhi | 18:6a4db94011d3 | 152 | { |
sahilmgandhi | 18:6a4db94011d3 | 153 | i2c->CTL |= I2C_CTL_INTEN_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 154 | } |
sahilmgandhi | 18:6a4db94011d3 | 155 | |
sahilmgandhi | 18:6a4db94011d3 | 156 | /** |
sahilmgandhi | 18:6a4db94011d3 | 157 | * @brief Get I2C Bus Clock |
sahilmgandhi | 18:6a4db94011d3 | 158 | * |
sahilmgandhi | 18:6a4db94011d3 | 159 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 160 | * |
sahilmgandhi | 18:6a4db94011d3 | 161 | * @return The actual I2C Bus clock in Hz |
sahilmgandhi | 18:6a4db94011d3 | 162 | * |
sahilmgandhi | 18:6a4db94011d3 | 163 | * @details To get the actual I2C Bus Clock frequency. |
sahilmgandhi | 18:6a4db94011d3 | 164 | */ |
sahilmgandhi | 18:6a4db94011d3 | 165 | uint32_t I2C_GetBusClockFreq(I2C_T *i2c) |
sahilmgandhi | 18:6a4db94011d3 | 166 | { |
sahilmgandhi | 18:6a4db94011d3 | 167 | uint32_t u32Divider = i2c->CLKDIV; |
sahilmgandhi | 18:6a4db94011d3 | 168 | |
sahilmgandhi | 18:6a4db94011d3 | 169 | return (SystemCoreClock / ((u32Divider + 1) << 2)); |
sahilmgandhi | 18:6a4db94011d3 | 170 | } |
sahilmgandhi | 18:6a4db94011d3 | 171 | |
sahilmgandhi | 18:6a4db94011d3 | 172 | /** |
sahilmgandhi | 18:6a4db94011d3 | 173 | * @brief Set I2C Bus Clock |
sahilmgandhi | 18:6a4db94011d3 | 174 | * |
sahilmgandhi | 18:6a4db94011d3 | 175 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 176 | * @param[in] u32BusClock The target I2C Bus Clock in Hz |
sahilmgandhi | 18:6a4db94011d3 | 177 | * |
sahilmgandhi | 18:6a4db94011d3 | 178 | * @return The actual I2C Bus Clock in Hz |
sahilmgandhi | 18:6a4db94011d3 | 179 | * |
sahilmgandhi | 18:6a4db94011d3 | 180 | * @details To set the actual I2C Bus Clock frequency. |
sahilmgandhi | 18:6a4db94011d3 | 181 | */ |
sahilmgandhi | 18:6a4db94011d3 | 182 | uint32_t I2C_SetBusClockFreq(I2C_T *i2c, uint32_t u32BusClock) |
sahilmgandhi | 18:6a4db94011d3 | 183 | { |
sahilmgandhi | 18:6a4db94011d3 | 184 | uint32_t u32Div; |
sahilmgandhi | 18:6a4db94011d3 | 185 | |
sahilmgandhi | 18:6a4db94011d3 | 186 | u32Div = (uint32_t)(((SystemCoreClock * 10) / (u32BusClock * 4) + 5) / 10 - 1); /* Compute proper divider for I2C clock */ |
sahilmgandhi | 18:6a4db94011d3 | 187 | i2c->CLKDIV = u32Div; |
sahilmgandhi | 18:6a4db94011d3 | 188 | |
sahilmgandhi | 18:6a4db94011d3 | 189 | return (SystemCoreClock / ((u32Div + 1) << 2)); |
sahilmgandhi | 18:6a4db94011d3 | 190 | } |
sahilmgandhi | 18:6a4db94011d3 | 191 | |
sahilmgandhi | 18:6a4db94011d3 | 192 | /** |
sahilmgandhi | 18:6a4db94011d3 | 193 | * @brief Get Interrupt Flag |
sahilmgandhi | 18:6a4db94011d3 | 194 | * |
sahilmgandhi | 18:6a4db94011d3 | 195 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 196 | * |
sahilmgandhi | 18:6a4db94011d3 | 197 | * @return I2C interrupt flag status |
sahilmgandhi | 18:6a4db94011d3 | 198 | * |
sahilmgandhi | 18:6a4db94011d3 | 199 | * @details To get I2C Bus interrupt flag. |
sahilmgandhi | 18:6a4db94011d3 | 200 | */ |
sahilmgandhi | 18:6a4db94011d3 | 201 | uint32_t I2C_GetIntFlag(I2C_T *i2c) |
sahilmgandhi | 18:6a4db94011d3 | 202 | { |
sahilmgandhi | 18:6a4db94011d3 | 203 | return ((i2c->CTL & I2C_CTL_SI_Msk) == I2C_CTL_SI_Msk ? 1 : 0); |
sahilmgandhi | 18:6a4db94011d3 | 204 | } |
sahilmgandhi | 18:6a4db94011d3 | 205 | |
sahilmgandhi | 18:6a4db94011d3 | 206 | /** |
sahilmgandhi | 18:6a4db94011d3 | 207 | * @brief Get I2C Bus Status Code |
sahilmgandhi | 18:6a4db94011d3 | 208 | * |
sahilmgandhi | 18:6a4db94011d3 | 209 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 210 | * |
sahilmgandhi | 18:6a4db94011d3 | 211 | * @return I2C Status Code |
sahilmgandhi | 18:6a4db94011d3 | 212 | * |
sahilmgandhi | 18:6a4db94011d3 | 213 | * @details To get I2C Bus Status Code. |
sahilmgandhi | 18:6a4db94011d3 | 214 | */ |
sahilmgandhi | 18:6a4db94011d3 | 215 | uint32_t I2C_GetStatus(I2C_T *i2c) |
sahilmgandhi | 18:6a4db94011d3 | 216 | { |
sahilmgandhi | 18:6a4db94011d3 | 217 | return (i2c->STATUS); |
sahilmgandhi | 18:6a4db94011d3 | 218 | } |
sahilmgandhi | 18:6a4db94011d3 | 219 | |
sahilmgandhi | 18:6a4db94011d3 | 220 | /** |
sahilmgandhi | 18:6a4db94011d3 | 221 | * @brief Read a Byte from I2C Bus |
sahilmgandhi | 18:6a4db94011d3 | 222 | * |
sahilmgandhi | 18:6a4db94011d3 | 223 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 224 | * |
sahilmgandhi | 18:6a4db94011d3 | 225 | * @return I2C Data |
sahilmgandhi | 18:6a4db94011d3 | 226 | * |
sahilmgandhi | 18:6a4db94011d3 | 227 | * @details To read a bytes data from specify I2C port. |
sahilmgandhi | 18:6a4db94011d3 | 228 | */ |
sahilmgandhi | 18:6a4db94011d3 | 229 | uint8_t I2C_GetData(I2C_T *i2c) |
sahilmgandhi | 18:6a4db94011d3 | 230 | { |
sahilmgandhi | 18:6a4db94011d3 | 231 | return (i2c->DAT); |
sahilmgandhi | 18:6a4db94011d3 | 232 | } |
sahilmgandhi | 18:6a4db94011d3 | 233 | |
sahilmgandhi | 18:6a4db94011d3 | 234 | /** |
sahilmgandhi | 18:6a4db94011d3 | 235 | * @brief Send a byte to I2C Bus |
sahilmgandhi | 18:6a4db94011d3 | 236 | * |
sahilmgandhi | 18:6a4db94011d3 | 237 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 238 | * @param[in] u8Data The data to send to I2C bus |
sahilmgandhi | 18:6a4db94011d3 | 239 | * |
sahilmgandhi | 18:6a4db94011d3 | 240 | * @return None |
sahilmgandhi | 18:6a4db94011d3 | 241 | * |
sahilmgandhi | 18:6a4db94011d3 | 242 | * @details This function is used to write a byte to specified I2C port |
sahilmgandhi | 18:6a4db94011d3 | 243 | */ |
sahilmgandhi | 18:6a4db94011d3 | 244 | void I2C_SetData(I2C_T *i2c, uint8_t u8Data) |
sahilmgandhi | 18:6a4db94011d3 | 245 | { |
sahilmgandhi | 18:6a4db94011d3 | 246 | i2c->DAT = u8Data; |
sahilmgandhi | 18:6a4db94011d3 | 247 | } |
sahilmgandhi | 18:6a4db94011d3 | 248 | |
sahilmgandhi | 18:6a4db94011d3 | 249 | /** |
sahilmgandhi | 18:6a4db94011d3 | 250 | * @brief Set 7-bit Slave Address and GC Mode |
sahilmgandhi | 18:6a4db94011d3 | 251 | * |
sahilmgandhi | 18:6a4db94011d3 | 252 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 253 | * @param[in] u8SlaveNo Set the number of I2C address register (0~3) |
sahilmgandhi | 18:6a4db94011d3 | 254 | * @param[in] u8SlaveAddr 7-bit slave address |
sahilmgandhi | 18:6a4db94011d3 | 255 | * @param[in] u8GCMode Enable/Disable GC mode (I2C_GCMODE_ENABLE / I2C_GCMODE_DISABLE) |
sahilmgandhi | 18:6a4db94011d3 | 256 | * |
sahilmgandhi | 18:6a4db94011d3 | 257 | * @return None |
sahilmgandhi | 18:6a4db94011d3 | 258 | * |
sahilmgandhi | 18:6a4db94011d3 | 259 | * @details This function is used to set 7-bit slave addresses in I2C SLAVE ADDRESS REGISTER (I2CADDR0~3) |
sahilmgandhi | 18:6a4db94011d3 | 260 | * and enable GC Mode. |
sahilmgandhi | 18:6a4db94011d3 | 261 | * |
sahilmgandhi | 18:6a4db94011d3 | 262 | */ |
sahilmgandhi | 18:6a4db94011d3 | 263 | void I2C_SetSlaveAddr(I2C_T *i2c, uint8_t u8SlaveNo, uint8_t u8SlaveAddr, uint8_t u8GCMode) |
sahilmgandhi | 18:6a4db94011d3 | 264 | { |
sahilmgandhi | 18:6a4db94011d3 | 265 | switch(u8SlaveNo) |
sahilmgandhi | 18:6a4db94011d3 | 266 | { |
sahilmgandhi | 18:6a4db94011d3 | 267 | case 1: |
sahilmgandhi | 18:6a4db94011d3 | 268 | i2c->ADDR1 = (u8SlaveAddr << 1) | u8GCMode; |
sahilmgandhi | 18:6a4db94011d3 | 269 | break; |
sahilmgandhi | 18:6a4db94011d3 | 270 | case 2: |
sahilmgandhi | 18:6a4db94011d3 | 271 | i2c->ADDR2 = (u8SlaveAddr << 1) | u8GCMode; |
sahilmgandhi | 18:6a4db94011d3 | 272 | break; |
sahilmgandhi | 18:6a4db94011d3 | 273 | case 3: |
sahilmgandhi | 18:6a4db94011d3 | 274 | i2c->ADDR3 = (u8SlaveAddr << 1) | u8GCMode; |
sahilmgandhi | 18:6a4db94011d3 | 275 | break; |
sahilmgandhi | 18:6a4db94011d3 | 276 | case 0: |
sahilmgandhi | 18:6a4db94011d3 | 277 | default: |
sahilmgandhi | 18:6a4db94011d3 | 278 | i2c->ADDR0 = (u8SlaveAddr << 1) | u8GCMode; |
sahilmgandhi | 18:6a4db94011d3 | 279 | break; |
sahilmgandhi | 18:6a4db94011d3 | 280 | } |
sahilmgandhi | 18:6a4db94011d3 | 281 | } |
sahilmgandhi | 18:6a4db94011d3 | 282 | |
sahilmgandhi | 18:6a4db94011d3 | 283 | /** |
sahilmgandhi | 18:6a4db94011d3 | 284 | * @brief Configure the mask bits of 7-bit Slave Address |
sahilmgandhi | 18:6a4db94011d3 | 285 | * |
sahilmgandhi | 18:6a4db94011d3 | 286 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 287 | * @param[in] u8SlaveNo Set the number of I2C address mask register (0~3) |
sahilmgandhi | 18:6a4db94011d3 | 288 | * @param[in] u8SlaveAddrMask A byte for slave address mask |
sahilmgandhi | 18:6a4db94011d3 | 289 | * |
sahilmgandhi | 18:6a4db94011d3 | 290 | * @return None |
sahilmgandhi | 18:6a4db94011d3 | 291 | * |
sahilmgandhi | 18:6a4db94011d3 | 292 | * @details This function is used to set 7-bit slave addresses. |
sahilmgandhi | 18:6a4db94011d3 | 293 | * |
sahilmgandhi | 18:6a4db94011d3 | 294 | */ |
sahilmgandhi | 18:6a4db94011d3 | 295 | void I2C_SetSlaveAddrMask(I2C_T *i2c, uint8_t u8SlaveNo, uint8_t u8SlaveAddrMask) |
sahilmgandhi | 18:6a4db94011d3 | 296 | { |
sahilmgandhi | 18:6a4db94011d3 | 297 | switch(u8SlaveNo) |
sahilmgandhi | 18:6a4db94011d3 | 298 | { |
sahilmgandhi | 18:6a4db94011d3 | 299 | case 1: |
sahilmgandhi | 18:6a4db94011d3 | 300 | i2c->ADDRMSK1 = u8SlaveAddrMask << 1; |
sahilmgandhi | 18:6a4db94011d3 | 301 | break; |
sahilmgandhi | 18:6a4db94011d3 | 302 | case 2: |
sahilmgandhi | 18:6a4db94011d3 | 303 | i2c->ADDRMSK2 = u8SlaveAddrMask << 1; |
sahilmgandhi | 18:6a4db94011d3 | 304 | break; |
sahilmgandhi | 18:6a4db94011d3 | 305 | case 3: |
sahilmgandhi | 18:6a4db94011d3 | 306 | i2c->ADDRMSK3 = u8SlaveAddrMask << 1; |
sahilmgandhi | 18:6a4db94011d3 | 307 | break; |
sahilmgandhi | 18:6a4db94011d3 | 308 | case 0: |
sahilmgandhi | 18:6a4db94011d3 | 309 | default: |
sahilmgandhi | 18:6a4db94011d3 | 310 | i2c->ADDRMSK0 = u8SlaveAddrMask << 1; |
sahilmgandhi | 18:6a4db94011d3 | 311 | break; |
sahilmgandhi | 18:6a4db94011d3 | 312 | } |
sahilmgandhi | 18:6a4db94011d3 | 313 | } |
sahilmgandhi | 18:6a4db94011d3 | 314 | |
sahilmgandhi | 18:6a4db94011d3 | 315 | /** |
sahilmgandhi | 18:6a4db94011d3 | 316 | * @brief Enable Time-out Counter Function and support Long Time-out |
sahilmgandhi | 18:6a4db94011d3 | 317 | * |
sahilmgandhi | 18:6a4db94011d3 | 318 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 319 | * @param[in] u8LongTimeout Configure DIV4 to enable Long Time-out (0/1) |
sahilmgandhi | 18:6a4db94011d3 | 320 | * |
sahilmgandhi | 18:6a4db94011d3 | 321 | * @return None |
sahilmgandhi | 18:6a4db94011d3 | 322 | * |
sahilmgandhi | 18:6a4db94011d3 | 323 | * @details This function enable Time-out Counter function and configure DIV4 to support Long |
sahilmgandhi | 18:6a4db94011d3 | 324 | * Time-out. |
sahilmgandhi | 18:6a4db94011d3 | 325 | * |
sahilmgandhi | 18:6a4db94011d3 | 326 | */ |
sahilmgandhi | 18:6a4db94011d3 | 327 | void I2C_EnableTimeout(I2C_T *i2c, uint8_t u8LongTimeout) |
sahilmgandhi | 18:6a4db94011d3 | 328 | { |
sahilmgandhi | 18:6a4db94011d3 | 329 | if(u8LongTimeout) |
sahilmgandhi | 18:6a4db94011d3 | 330 | i2c->TOCTL |= I2C_TOCTL_TOCDIV4_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 331 | else |
sahilmgandhi | 18:6a4db94011d3 | 332 | i2c->TOCTL &= ~I2C_TOCTL_TOCDIV4_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 333 | |
sahilmgandhi | 18:6a4db94011d3 | 334 | i2c->TOCTL |= I2C_TOCTL_TOCEN_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 335 | } |
sahilmgandhi | 18:6a4db94011d3 | 336 | |
sahilmgandhi | 18:6a4db94011d3 | 337 | /** |
sahilmgandhi | 18:6a4db94011d3 | 338 | * @brief Disable Time-out Counter Function |
sahilmgandhi | 18:6a4db94011d3 | 339 | * |
sahilmgandhi | 18:6a4db94011d3 | 340 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 341 | * |
sahilmgandhi | 18:6a4db94011d3 | 342 | * @return None |
sahilmgandhi | 18:6a4db94011d3 | 343 | * |
sahilmgandhi | 18:6a4db94011d3 | 344 | * @details To disable Time-out Counter function in I2CTOC register. |
sahilmgandhi | 18:6a4db94011d3 | 345 | * |
sahilmgandhi | 18:6a4db94011d3 | 346 | */ |
sahilmgandhi | 18:6a4db94011d3 | 347 | void I2C_DisableTimeout(I2C_T *i2c) |
sahilmgandhi | 18:6a4db94011d3 | 348 | { |
sahilmgandhi | 18:6a4db94011d3 | 349 | i2c->TOCTL &= ~I2C_TOCTL_TOCEN_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 350 | } |
sahilmgandhi | 18:6a4db94011d3 | 351 | |
sahilmgandhi | 18:6a4db94011d3 | 352 | /** |
sahilmgandhi | 18:6a4db94011d3 | 353 | * @brief Enable I2C Wake-up Function |
sahilmgandhi | 18:6a4db94011d3 | 354 | * |
sahilmgandhi | 18:6a4db94011d3 | 355 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 356 | * |
sahilmgandhi | 18:6a4db94011d3 | 357 | * @return None |
sahilmgandhi | 18:6a4db94011d3 | 358 | * |
sahilmgandhi | 18:6a4db94011d3 | 359 | * @details To enable Wake-up function of I2C Wake-up control register. |
sahilmgandhi | 18:6a4db94011d3 | 360 | * |
sahilmgandhi | 18:6a4db94011d3 | 361 | */ |
sahilmgandhi | 18:6a4db94011d3 | 362 | void I2C_EnableWakeup(I2C_T *i2c) |
sahilmgandhi | 18:6a4db94011d3 | 363 | { |
sahilmgandhi | 18:6a4db94011d3 | 364 | i2c->WKCTL |= I2C_WKCTL_WKEN_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 365 | } |
sahilmgandhi | 18:6a4db94011d3 | 366 | |
sahilmgandhi | 18:6a4db94011d3 | 367 | /** |
sahilmgandhi | 18:6a4db94011d3 | 368 | * @brief Disable I2C Wake-up Function |
sahilmgandhi | 18:6a4db94011d3 | 369 | * |
sahilmgandhi | 18:6a4db94011d3 | 370 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 371 | * |
sahilmgandhi | 18:6a4db94011d3 | 372 | * @return None |
sahilmgandhi | 18:6a4db94011d3 | 373 | * |
sahilmgandhi | 18:6a4db94011d3 | 374 | * @details To disable Wake-up function of I2C Wake-up control register. |
sahilmgandhi | 18:6a4db94011d3 | 375 | * |
sahilmgandhi | 18:6a4db94011d3 | 376 | */ |
sahilmgandhi | 18:6a4db94011d3 | 377 | void I2C_DisableWakeup(I2C_T *i2c) |
sahilmgandhi | 18:6a4db94011d3 | 378 | { |
sahilmgandhi | 18:6a4db94011d3 | 379 | i2c->WKCTL &= ~I2C_WKCTL_WKEN_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 380 | } |
sahilmgandhi | 18:6a4db94011d3 | 381 | |
sahilmgandhi | 18:6a4db94011d3 | 382 | /** |
sahilmgandhi | 18:6a4db94011d3 | 383 | * @brief To get SMBus Status |
sahilmgandhi | 18:6a4db94011d3 | 384 | * |
sahilmgandhi | 18:6a4db94011d3 | 385 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 386 | * |
sahilmgandhi | 18:6a4db94011d3 | 387 | * @return SMBus status |
sahilmgandhi | 18:6a4db94011d3 | 388 | * |
sahilmgandhi | 18:6a4db94011d3 | 389 | * @details To get the Bus Management status of I2C_BUSSTS register |
sahilmgandhi | 18:6a4db94011d3 | 390 | * |
sahilmgandhi | 18:6a4db94011d3 | 391 | */ |
sahilmgandhi | 18:6a4db94011d3 | 392 | uint32_t I2C_SMBusGetStatus(I2C_T *i2c) |
sahilmgandhi | 18:6a4db94011d3 | 393 | { |
sahilmgandhi | 18:6a4db94011d3 | 394 | return (i2c->BUSSTS); |
sahilmgandhi | 18:6a4db94011d3 | 395 | } |
sahilmgandhi | 18:6a4db94011d3 | 396 | |
sahilmgandhi | 18:6a4db94011d3 | 397 | /** |
sahilmgandhi | 18:6a4db94011d3 | 398 | * @brief Clear SMBus Interrupt Flag |
sahilmgandhi | 18:6a4db94011d3 | 399 | * |
sahilmgandhi | 18:6a4db94011d3 | 400 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 401 | * @param[in] u8SMBusIntFlag Specify SMBus interrupt flag |
sahilmgandhi | 18:6a4db94011d3 | 402 | * |
sahilmgandhi | 18:6a4db94011d3 | 403 | * @return None |
sahilmgandhi | 18:6a4db94011d3 | 404 | * |
sahilmgandhi | 18:6a4db94011d3 | 405 | * @details To clear flags of I2C_BUSSTS status register if interrupt set. |
sahilmgandhi | 18:6a4db94011d3 | 406 | * |
sahilmgandhi | 18:6a4db94011d3 | 407 | */ |
sahilmgandhi | 18:6a4db94011d3 | 408 | void I2C_SMBusClearInterruptFlag(I2C_T *i2c, uint8_t u8SMBusIntFlag) |
sahilmgandhi | 18:6a4db94011d3 | 409 | { |
sahilmgandhi | 18:6a4db94011d3 | 410 | i2c->BUSSTS |= u8SMBusIntFlag; |
sahilmgandhi | 18:6a4db94011d3 | 411 | } |
sahilmgandhi | 18:6a4db94011d3 | 412 | |
sahilmgandhi | 18:6a4db94011d3 | 413 | /** |
sahilmgandhi | 18:6a4db94011d3 | 414 | * @brief Set SMBus Bytes Counts of Transmission or Reception |
sahilmgandhi | 18:6a4db94011d3 | 415 | * |
sahilmgandhi | 18:6a4db94011d3 | 416 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 417 | * @param[in] u32PktSize Transmit / Receive bytes |
sahilmgandhi | 18:6a4db94011d3 | 418 | * |
sahilmgandhi | 18:6a4db94011d3 | 419 | * @return None |
sahilmgandhi | 18:6a4db94011d3 | 420 | * |
sahilmgandhi | 18:6a4db94011d3 | 421 | * @details The transmission or receive byte number in one transaction when PECEN is set. The maximum is 255 bytes. |
sahilmgandhi | 18:6a4db94011d3 | 422 | * |
sahilmgandhi | 18:6a4db94011d3 | 423 | */ |
sahilmgandhi | 18:6a4db94011d3 | 424 | void I2C_SMBusSetPacketByteCount(I2C_T *i2c, uint32_t u32PktSize) |
sahilmgandhi | 18:6a4db94011d3 | 425 | { |
sahilmgandhi | 18:6a4db94011d3 | 426 | i2c->PKTSIZE = u32PktSize; |
sahilmgandhi | 18:6a4db94011d3 | 427 | } |
sahilmgandhi | 18:6a4db94011d3 | 428 | |
sahilmgandhi | 18:6a4db94011d3 | 429 | /** |
sahilmgandhi | 18:6a4db94011d3 | 430 | * @brief Init SMBus Host/Device Mode |
sahilmgandhi | 18:6a4db94011d3 | 431 | * |
sahilmgandhi | 18:6a4db94011d3 | 432 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 433 | * @param[in] u8HostDevice Init SMBus port mode(I2C_SMBH_ENABLE(1)/I2C_SMBD_ENABLE(0)) |
sahilmgandhi | 18:6a4db94011d3 | 434 | * |
sahilmgandhi | 18:6a4db94011d3 | 435 | * @return None |
sahilmgandhi | 18:6a4db94011d3 | 436 | * |
sahilmgandhi | 18:6a4db94011d3 | 437 | * @details Using SMBus communication must specify the port is a Host or a Device. |
sahilmgandhi | 18:6a4db94011d3 | 438 | * |
sahilmgandhi | 18:6a4db94011d3 | 439 | */ |
sahilmgandhi | 18:6a4db94011d3 | 440 | void I2C_SMBusOpen(I2C_T *i2c, uint8_t u8HostDevice) |
sahilmgandhi | 18:6a4db94011d3 | 441 | { |
sahilmgandhi | 18:6a4db94011d3 | 442 | /* Clear BMHEN, BMDEN of BUSCTL Register */ |
sahilmgandhi | 18:6a4db94011d3 | 443 | i2c->BUSCTL &= ~(I2C_BUSCTL_BMHEN_Msk | I2C_BUSCTL_BMDEN_Msk); |
sahilmgandhi | 18:6a4db94011d3 | 444 | |
sahilmgandhi | 18:6a4db94011d3 | 445 | /* Set SMBus Host/Device Mode, and enable Bus Management*/ |
sahilmgandhi | 18:6a4db94011d3 | 446 | if(u8HostDevice == I2C_SMBH_ENABLE) |
sahilmgandhi | 18:6a4db94011d3 | 447 | i2c->BUSCTL |= (I2C_BUSCTL_BMHEN_Msk | I2C_BUSCTL_BUSEN_Msk); |
sahilmgandhi | 18:6a4db94011d3 | 448 | else |
sahilmgandhi | 18:6a4db94011d3 | 449 | i2c->BUSCTL |= (I2C_BUSCTL_BMDEN_Msk | I2C_BUSCTL_BUSEN_Msk); |
sahilmgandhi | 18:6a4db94011d3 | 450 | } |
sahilmgandhi | 18:6a4db94011d3 | 451 | |
sahilmgandhi | 18:6a4db94011d3 | 452 | /** |
sahilmgandhi | 18:6a4db94011d3 | 453 | * @brief Disable SMBus function |
sahilmgandhi | 18:6a4db94011d3 | 454 | * |
sahilmgandhi | 18:6a4db94011d3 | 455 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 456 | * |
sahilmgandhi | 18:6a4db94011d3 | 457 | * @return None |
sahilmgandhi | 18:6a4db94011d3 | 458 | * |
sahilmgandhi | 18:6a4db94011d3 | 459 | * @details Disable all SMBus function include Bus disable, CRC check, Acknowledge by manual, Host/Device Mode. |
sahilmgandhi | 18:6a4db94011d3 | 460 | * |
sahilmgandhi | 18:6a4db94011d3 | 461 | */ |
sahilmgandhi | 18:6a4db94011d3 | 462 | void I2C_SMBusClose(I2C_T *i2c) |
sahilmgandhi | 18:6a4db94011d3 | 463 | { |
sahilmgandhi | 18:6a4db94011d3 | 464 | |
sahilmgandhi | 18:6a4db94011d3 | 465 | i2c->BUSCTL = 0x00; |
sahilmgandhi | 18:6a4db94011d3 | 466 | } |
sahilmgandhi | 18:6a4db94011d3 | 467 | |
sahilmgandhi | 18:6a4db94011d3 | 468 | /** |
sahilmgandhi | 18:6a4db94011d3 | 469 | * @brief Enable SMBus PEC Transmit Function |
sahilmgandhi | 18:6a4db94011d3 | 470 | * |
sahilmgandhi | 18:6a4db94011d3 | 471 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 472 | * @param[in] u8PECTxEn CRC transmit enable(PECTX_ENABLE) or disable(PECTX_DISABLE) |
sahilmgandhi | 18:6a4db94011d3 | 473 | * |
sahilmgandhi | 18:6a4db94011d3 | 474 | * @return None |
sahilmgandhi | 18:6a4db94011d3 | 475 | * |
sahilmgandhi | 18:6a4db94011d3 | 476 | * @details When enable CRC check function, the Host or Device needs to transmit CRC byte. |
sahilmgandhi | 18:6a4db94011d3 | 477 | * |
sahilmgandhi | 18:6a4db94011d3 | 478 | */ |
sahilmgandhi | 18:6a4db94011d3 | 479 | void I2C_SMBusPECTxEnable(I2C_T *i2c, uint8_t u8PECTxEn) |
sahilmgandhi | 18:6a4db94011d3 | 480 | { |
sahilmgandhi | 18:6a4db94011d3 | 481 | i2c->BUSCTL &= ~I2C_BUSCTL_PECTXEN_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 482 | |
sahilmgandhi | 18:6a4db94011d3 | 483 | if(u8PECTxEn) |
sahilmgandhi | 18:6a4db94011d3 | 484 | i2c->BUSCTL |= (I2C_BUSCTL_PECEN_Msk | I2C_BUSCTL_PECTXEN_Msk); |
sahilmgandhi | 18:6a4db94011d3 | 485 | else |
sahilmgandhi | 18:6a4db94011d3 | 486 | i2c->BUSCTL |= I2C_BUSCTL_PECEN_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 487 | } |
sahilmgandhi | 18:6a4db94011d3 | 488 | |
sahilmgandhi | 18:6a4db94011d3 | 489 | /** |
sahilmgandhi | 18:6a4db94011d3 | 490 | * @brief Get SMBus CRC value |
sahilmgandhi | 18:6a4db94011d3 | 491 | * |
sahilmgandhi | 18:6a4db94011d3 | 492 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 493 | * |
sahilmgandhi | 18:6a4db94011d3 | 494 | * @return A byte is packet error check value |
sahilmgandhi | 18:6a4db94011d3 | 495 | * |
sahilmgandhi | 18:6a4db94011d3 | 496 | * @details The CRC check value after a transmission or a reception by count by using CRC8 |
sahilmgandhi | 18:6a4db94011d3 | 497 | * |
sahilmgandhi | 18:6a4db94011d3 | 498 | */ |
sahilmgandhi | 18:6a4db94011d3 | 499 | uint8_t I2C_SMBusGetPECValue(I2C_T *i2c) |
sahilmgandhi | 18:6a4db94011d3 | 500 | { |
sahilmgandhi | 18:6a4db94011d3 | 501 | return i2c->PKTCRC; |
sahilmgandhi | 18:6a4db94011d3 | 502 | } |
sahilmgandhi | 18:6a4db94011d3 | 503 | |
sahilmgandhi | 18:6a4db94011d3 | 504 | /** |
sahilmgandhi | 18:6a4db94011d3 | 505 | * @brief Calculate Time-out of SMBus idle period |
sahilmgandhi | 18:6a4db94011d3 | 506 | * |
sahilmgandhi | 18:6a4db94011d3 | 507 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 508 | * @param[in] us Time-out length(us) |
sahilmgandhi | 18:6a4db94011d3 | 509 | * @param[in] u32Hclk I2C peripheral clock frequency |
sahilmgandhi | 18:6a4db94011d3 | 510 | * |
sahilmgandhi | 18:6a4db94011d3 | 511 | * @return None |
sahilmgandhi | 18:6a4db94011d3 | 512 | * |
sahilmgandhi | 18:6a4db94011d3 | 513 | * @details This function is used to set SMBus Time-out length when bus is in Idle state. |
sahilmgandhi | 18:6a4db94011d3 | 514 | * |
sahilmgandhi | 18:6a4db94011d3 | 515 | */ |
sahilmgandhi | 18:6a4db94011d3 | 516 | |
sahilmgandhi | 18:6a4db94011d3 | 517 | void I2C_SMBusIdleTimeout(I2C_T *i2c, uint32_t us, uint32_t u32Hclk) |
sahilmgandhi | 18:6a4db94011d3 | 518 | { |
sahilmgandhi | 18:6a4db94011d3 | 519 | uint32_t u32Div, u32Hclk_kHz; |
sahilmgandhi | 18:6a4db94011d3 | 520 | |
sahilmgandhi | 18:6a4db94011d3 | 521 | i2c->BUSCTL |= I2C_BUSCTL_TIDLE_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 522 | u32Hclk_kHz = u32Hclk / 1000; |
sahilmgandhi | 18:6a4db94011d3 | 523 | u32Div = (((us * u32Hclk_kHz) / 1000) >> 2) - 1; |
sahilmgandhi | 18:6a4db94011d3 | 524 | if(u32Div > 255) |
sahilmgandhi | 18:6a4db94011d3 | 525 | { |
sahilmgandhi | 18:6a4db94011d3 | 526 | i2c->BUSTOUT = 0xFF; |
sahilmgandhi | 18:6a4db94011d3 | 527 | } |
sahilmgandhi | 18:6a4db94011d3 | 528 | else |
sahilmgandhi | 18:6a4db94011d3 | 529 | { |
sahilmgandhi | 18:6a4db94011d3 | 530 | i2c->BUSTOUT = u32Div; |
sahilmgandhi | 18:6a4db94011d3 | 531 | } |
sahilmgandhi | 18:6a4db94011d3 | 532 | |
sahilmgandhi | 18:6a4db94011d3 | 533 | } |
sahilmgandhi | 18:6a4db94011d3 | 534 | |
sahilmgandhi | 18:6a4db94011d3 | 535 | /** |
sahilmgandhi | 18:6a4db94011d3 | 536 | * @brief Calculate Time-out of SMBus active period |
sahilmgandhi | 18:6a4db94011d3 | 537 | * |
sahilmgandhi | 18:6a4db94011d3 | 538 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 539 | * @param[in] ms Time-out length(ms) |
sahilmgandhi | 18:6a4db94011d3 | 540 | * @param[in] u32Pclk peripheral clock frequency |
sahilmgandhi | 18:6a4db94011d3 | 541 | * |
sahilmgandhi | 18:6a4db94011d3 | 542 | * @return None |
sahilmgandhi | 18:6a4db94011d3 | 543 | * |
sahilmgandhi | 18:6a4db94011d3 | 544 | * @details This function is used to set SMBus Time-out length when bus is in active state. |
sahilmgandhi | 18:6a4db94011d3 | 545 | * Time-out length is calculate the SCL line "one clock" pull low timing. |
sahilmgandhi | 18:6a4db94011d3 | 546 | * |
sahilmgandhi | 18:6a4db94011d3 | 547 | */ |
sahilmgandhi | 18:6a4db94011d3 | 548 | |
sahilmgandhi | 18:6a4db94011d3 | 549 | void I2C_SMBusTimeout(I2C_T *i2c, uint32_t ms, uint32_t u32Pclk) |
sahilmgandhi | 18:6a4db94011d3 | 550 | { |
sahilmgandhi | 18:6a4db94011d3 | 551 | uint32_t u32Div, u32Pclk_kHz; |
sahilmgandhi | 18:6a4db94011d3 | 552 | |
sahilmgandhi | 18:6a4db94011d3 | 553 | i2c->BUSCTL &= ~I2C_BUSCTL_TIDLE_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 554 | |
sahilmgandhi | 18:6a4db94011d3 | 555 | /* DIV4 disabled */ |
sahilmgandhi | 18:6a4db94011d3 | 556 | i2c->TOCTL &= ~I2C_TOCTL_TOCEN_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 557 | u32Pclk_kHz = u32Pclk / 1000; |
sahilmgandhi | 18:6a4db94011d3 | 558 | u32Div = ((ms * u32Pclk_kHz) / (16 * 1024)) - 1; |
sahilmgandhi | 18:6a4db94011d3 | 559 | if(u32Div <= 0xFF) |
sahilmgandhi | 18:6a4db94011d3 | 560 | { |
sahilmgandhi | 18:6a4db94011d3 | 561 | i2c->BUSTOUT = u32Div; |
sahilmgandhi | 18:6a4db94011d3 | 562 | return; |
sahilmgandhi | 18:6a4db94011d3 | 563 | } |
sahilmgandhi | 18:6a4db94011d3 | 564 | |
sahilmgandhi | 18:6a4db94011d3 | 565 | /* DIV4 enabled */ |
sahilmgandhi | 18:6a4db94011d3 | 566 | i2c->TOCTL |= I2C_TOCTL_TOCEN_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 567 | |
sahilmgandhi | 18:6a4db94011d3 | 568 | i2c->BUSTOUT = (((ms * u32Pclk_kHz) / (16 * 1024 * 4)) - 1) & 0xFF; //The max value is 255 |
sahilmgandhi | 18:6a4db94011d3 | 569 | } |
sahilmgandhi | 18:6a4db94011d3 | 570 | |
sahilmgandhi | 18:6a4db94011d3 | 571 | /** |
sahilmgandhi | 18:6a4db94011d3 | 572 | * @brief Calculate Cumulative Clock low Time-out of SMBus active period |
sahilmgandhi | 18:6a4db94011d3 | 573 | * |
sahilmgandhi | 18:6a4db94011d3 | 574 | * @param[in] i2c Specify I2C port |
sahilmgandhi | 18:6a4db94011d3 | 575 | * @param[in] ms Time-out length(ms) |
sahilmgandhi | 18:6a4db94011d3 | 576 | * @param[in] u32Pclk peripheral clock frequency |
sahilmgandhi | 18:6a4db94011d3 | 577 | * |
sahilmgandhi | 18:6a4db94011d3 | 578 | * @return None |
sahilmgandhi | 18:6a4db94011d3 | 579 | * |
sahilmgandhi | 18:6a4db94011d3 | 580 | * @details This function is used to set SMBus Time-out length when bus is in Active state. |
sahilmgandhi | 18:6a4db94011d3 | 581 | * Time-out length is calculate the SCL line "clocks" low cumulative timing. |
sahilmgandhi | 18:6a4db94011d3 | 582 | * |
sahilmgandhi | 18:6a4db94011d3 | 583 | */ |
sahilmgandhi | 18:6a4db94011d3 | 584 | |
sahilmgandhi | 18:6a4db94011d3 | 585 | void I2C_SMBusClockLoTimeout(I2C_T *i2c, uint32_t ms, uint32_t u32Pclk) |
sahilmgandhi | 18:6a4db94011d3 | 586 | { |
sahilmgandhi | 18:6a4db94011d3 | 587 | uint32_t u32Div, u32Pclk_kHz; |
sahilmgandhi | 18:6a4db94011d3 | 588 | |
sahilmgandhi | 18:6a4db94011d3 | 589 | i2c->BUSCTL &= ~I2C_BUSCTL_TIDLE_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 590 | |
sahilmgandhi | 18:6a4db94011d3 | 591 | /* DIV4 disabled */ |
sahilmgandhi | 18:6a4db94011d3 | 592 | i2c->TOCTL &= ~I2C_TOCTL_TOCEN_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 593 | u32Pclk_kHz = u32Pclk / 1000; |
sahilmgandhi | 18:6a4db94011d3 | 594 | u32Div = ((ms * u32Pclk_kHz) / (16 * 1024)) - 1; |
sahilmgandhi | 18:6a4db94011d3 | 595 | if(u32Div <= 0xFF) |
sahilmgandhi | 18:6a4db94011d3 | 596 | { |
sahilmgandhi | 18:6a4db94011d3 | 597 | i2c->CLKTOUT = u32Div; |
sahilmgandhi | 18:6a4db94011d3 | 598 | return; |
sahilmgandhi | 18:6a4db94011d3 | 599 | } |
sahilmgandhi | 18:6a4db94011d3 | 600 | |
sahilmgandhi | 18:6a4db94011d3 | 601 | /* DIV4 enabled */ |
sahilmgandhi | 18:6a4db94011d3 | 602 | i2c->TOCTL |= I2C_TOCTL_TOCEN_Msk; |
sahilmgandhi | 18:6a4db94011d3 | 603 | i2c->CLKTOUT = (((ms * u32Pclk_kHz) / (16 * 1024 * 4)) - 1) & 0xFF; //The max value is 255 |
sahilmgandhi | 18:6a4db94011d3 | 604 | } |
sahilmgandhi | 18:6a4db94011d3 | 605 | |
sahilmgandhi | 18:6a4db94011d3 | 606 | /*@}*/ /* end of group I2C_EXPORTED_FUNCTIONS */ |
sahilmgandhi | 18:6a4db94011d3 | 607 | |
sahilmgandhi | 18:6a4db94011d3 | 608 | /*@}*/ /* end of group I2C_Driver */ |
sahilmgandhi | 18:6a4db94011d3 | 609 | |
sahilmgandhi | 18:6a4db94011d3 | 610 | /*@}*/ /* end of group Standard_Driver */ |
sahilmgandhi | 18:6a4db94011d3 | 611 | |
sahilmgandhi | 18:6a4db94011d3 | 612 | /*** (C) COPYRIGHT 2014~2015 Nuvoton Technology Corp. ***/ |