mbed library sources. Supersedes mbed-src.
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targets/TARGET_NUVOTON/TARGET_NUC472/device/StdDriver/nuc472_i2s.c@149:156823d33999, 2016-10-28 (annotated)
- Committer:
- <>
- Date:
- Fri Oct 28 11:17:30 2016 +0100
- Revision:
- 149:156823d33999
- Parent:
- targets/cmsis/TARGET_NUVOTON/TARGET_NUC472/StdDriver/nuc472_i2s.c@144:ef7eb2e8f9f7
This updates the lib to the mbed lib v128
NOTE: This release includes a restructuring of the file and directory locations and thus some
include paths in your code may need updating accordingly.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
<> | 144:ef7eb2e8f9f7 | 1 | /****************************************************************************** |
<> | 144:ef7eb2e8f9f7 | 2 | * @file i2s.c |
<> | 144:ef7eb2e8f9f7 | 3 | * @version V0.10 |
<> | 144:ef7eb2e8f9f7 | 4 | * $Revision: 14 $ |
<> | 144:ef7eb2e8f9f7 | 5 | * $Date: 14/09/30 1:10p $ |
<> | 144:ef7eb2e8f9f7 | 6 | * @brief NUC472/NUC442 I2S driver source file |
<> | 144:ef7eb2e8f9f7 | 7 | * |
<> | 144:ef7eb2e8f9f7 | 8 | * @note |
<> | 144:ef7eb2e8f9f7 | 9 | * Copyright (C) 2014 Nuvoton Technology Corp. All rights reserved. |
<> | 144:ef7eb2e8f9f7 | 10 | *****************************************************************************/ |
<> | 144:ef7eb2e8f9f7 | 11 | |
<> | 144:ef7eb2e8f9f7 | 12 | #include <stdio.h> |
<> | 144:ef7eb2e8f9f7 | 13 | #include "NUC472_442.h" |
<> | 144:ef7eb2e8f9f7 | 14 | |
<> | 144:ef7eb2e8f9f7 | 15 | /** @addtogroup NUC472_442_Device_Driver NUC472/NUC442 Device Driver |
<> | 144:ef7eb2e8f9f7 | 16 | @{ |
<> | 144:ef7eb2e8f9f7 | 17 | */ |
<> | 144:ef7eb2e8f9f7 | 18 | |
<> | 144:ef7eb2e8f9f7 | 19 | /** @addtogroup NUC472_442_I2S_Driver I2S Driver |
<> | 144:ef7eb2e8f9f7 | 20 | @{ |
<> | 144:ef7eb2e8f9f7 | 21 | */ |
<> | 144:ef7eb2e8f9f7 | 22 | |
<> | 144:ef7eb2e8f9f7 | 23 | /** @addtogroup NUC472_442_I2S_EXPORTED_FUNCTIONS I2S Exported Functions |
<> | 144:ef7eb2e8f9f7 | 24 | @{ |
<> | 144:ef7eb2e8f9f7 | 25 | */ |
<> | 144:ef7eb2e8f9f7 | 26 | |
<> | 144:ef7eb2e8f9f7 | 27 | /** |
<> | 144:ef7eb2e8f9f7 | 28 | * @brief This function is used to get I2S source clock frequency. |
<> | 144:ef7eb2e8f9f7 | 29 | * @param[in] i2s is the base address of I2S module. |
<> | 144:ef7eb2e8f9f7 | 30 | * @return I2S source clock frequency (Hz). |
<> | 144:ef7eb2e8f9f7 | 31 | */ |
<> | 144:ef7eb2e8f9f7 | 32 | static uint32_t I2S_GetSourceClockFreq(I2S_T *i2s) |
<> | 144:ef7eb2e8f9f7 | 33 | { |
<> | 144:ef7eb2e8f9f7 | 34 | uint32_t u32Freq, u32ClkSrcSel; |
<> | 144:ef7eb2e8f9f7 | 35 | |
<> | 144:ef7eb2e8f9f7 | 36 | // get I2S selection clock source |
<> | 144:ef7eb2e8f9f7 | 37 | if((uint32_t)i2s == I2S0_BASE) |
<> | 144:ef7eb2e8f9f7 | 38 | u32ClkSrcSel = CLK->CLKSEL3 & CLK_CLKSEL3_I2S0SEL_Msk; |
<> | 144:ef7eb2e8f9f7 | 39 | else |
<> | 144:ef7eb2e8f9f7 | 40 | u32ClkSrcSel = CLK->CLKSEL3 & CLK_CLKSEL3_I2S1SEL_Msk; |
<> | 144:ef7eb2e8f9f7 | 41 | |
<> | 144:ef7eb2e8f9f7 | 42 | switch (u32ClkSrcSel) { |
<> | 144:ef7eb2e8f9f7 | 43 | case CLK_CLKSEL3_I2S0SEL_HXT: |
<> | 144:ef7eb2e8f9f7 | 44 | u32Freq = __HXT; |
<> | 144:ef7eb2e8f9f7 | 45 | break; |
<> | 144:ef7eb2e8f9f7 | 46 | |
<> | 144:ef7eb2e8f9f7 | 47 | case CLK_CLKSEL3_I2S0SEL_PLL: |
<> | 144:ef7eb2e8f9f7 | 48 | case CLK_CLKSEL3_I2S1SEL_PLL: |
<> | 144:ef7eb2e8f9f7 | 49 | u32Freq = CLK_GetPLLClockFreq(); |
<> | 144:ef7eb2e8f9f7 | 50 | break; |
<> | 144:ef7eb2e8f9f7 | 51 | |
<> | 144:ef7eb2e8f9f7 | 52 | case CLK_CLKSEL3_I2S0SEL_HIRC: |
<> | 144:ef7eb2e8f9f7 | 53 | case CLK_CLKSEL3_I2S1SEL_HIRC: |
<> | 144:ef7eb2e8f9f7 | 54 | u32Freq = __HIRC; |
<> | 144:ef7eb2e8f9f7 | 55 | break; |
<> | 144:ef7eb2e8f9f7 | 56 | |
<> | 144:ef7eb2e8f9f7 | 57 | case CLK_CLKSEL3_I2S0SEL_PCLK: |
<> | 144:ef7eb2e8f9f7 | 58 | case CLK_CLKSEL3_I2S1SEL_PCLK: |
<> | 144:ef7eb2e8f9f7 | 59 | u32Freq = SystemCoreClock; |
<> | 144:ef7eb2e8f9f7 | 60 | break; |
<> | 144:ef7eb2e8f9f7 | 61 | |
<> | 144:ef7eb2e8f9f7 | 62 | default: |
<> | 144:ef7eb2e8f9f7 | 63 | u32Freq = __HIRC; |
<> | 144:ef7eb2e8f9f7 | 64 | break; |
<> | 144:ef7eb2e8f9f7 | 65 | } |
<> | 144:ef7eb2e8f9f7 | 66 | |
<> | 144:ef7eb2e8f9f7 | 67 | return u32Freq; |
<> | 144:ef7eb2e8f9f7 | 68 | } |
<> | 144:ef7eb2e8f9f7 | 69 | |
<> | 144:ef7eb2e8f9f7 | 70 | /** |
<> | 144:ef7eb2e8f9f7 | 71 | * @brief This function configures some parameters of I2S interface for general purpose use. |
<> | 144:ef7eb2e8f9f7 | 72 | * The sample rate may not be used from the parameter, it depends on system's clock settings, |
<> | 144:ef7eb2e8f9f7 | 73 | * but real sample rate used by system will be returned for reference. |
<> | 144:ef7eb2e8f9f7 | 74 | * @param[in] i2s is the base address of I2S module. |
<> | 144:ef7eb2e8f9f7 | 75 | * @param[in] u32MasterSlave I2S operation mode. Valid values are: |
<> | 144:ef7eb2e8f9f7 | 76 | * - \ref I2S_MODE_MASTER |
<> | 144:ef7eb2e8f9f7 | 77 | * - \ref I2S_MODE_SLAVE |
<> | 144:ef7eb2e8f9f7 | 78 | * @param[in] u32SampleRate Sample rate |
<> | 144:ef7eb2e8f9f7 | 79 | * @param[in] u32WordWidth Data length. Valid values are: |
<> | 144:ef7eb2e8f9f7 | 80 | * - \ref I2S_DATABIT_8 |
<> | 144:ef7eb2e8f9f7 | 81 | * - \ref I2S_DATABIT_16 |
<> | 144:ef7eb2e8f9f7 | 82 | * - \ref I2S_DATABIT_24 |
<> | 144:ef7eb2e8f9f7 | 83 | * - \ref I2S_DATABIT_32 |
<> | 144:ef7eb2e8f9f7 | 84 | * @param[in] u32Channels: Audio format. Valid values are: |
<> | 144:ef7eb2e8f9f7 | 85 | * - \ref I2S_MONO |
<> | 144:ef7eb2e8f9f7 | 86 | * - \ref I2S_STEREO |
<> | 144:ef7eb2e8f9f7 | 87 | * @param[in] u32DataFormat: Data format. Valid values are: |
<> | 144:ef7eb2e8f9f7 | 88 | * - \ref I2S_FORMAT_I2S |
<> | 144:ef7eb2e8f9f7 | 89 | * - \ref I2S_FORMAT_MSB |
<> | 144:ef7eb2e8f9f7 | 90 | * - \ref I2S_FORMAT_PCMA |
<> | 144:ef7eb2e8f9f7 | 91 | * - \ref I2S_FORMAT_PCMB |
<> | 144:ef7eb2e8f9f7 | 92 | * @param[in] u32AudioInterface: Audio interface. Valid values are: |
<> | 144:ef7eb2e8f9f7 | 93 | * - \ref I2S_I2S |
<> | 144:ef7eb2e8f9f7 | 94 | * - \ref I2S_PCM |
<> | 144:ef7eb2e8f9f7 | 95 | * @return Real sample rate. |
<> | 144:ef7eb2e8f9f7 | 96 | */ |
<> | 144:ef7eb2e8f9f7 | 97 | uint32_t I2S_Open(I2S_T *i2s, uint32_t u32MasterSlave, uint32_t u32SampleRate, uint32_t u32WordWidth, uint32_t u32Channels, uint32_t u32DataFormat, uint32_t u32AudioInterface) |
<> | 144:ef7eb2e8f9f7 | 98 | { |
<> | 144:ef7eb2e8f9f7 | 99 | uint16_t u16Divider; |
<> | 144:ef7eb2e8f9f7 | 100 | uint32_t u32BitRate, u32SrcClk; |
<> | 144:ef7eb2e8f9f7 | 101 | |
<> | 144:ef7eb2e8f9f7 | 102 | if((uint32_t)i2s == I2S0_BASE) { |
<> | 144:ef7eb2e8f9f7 | 103 | SYS->IPRST1 |= SYS_IPRST1_I2S0RST_Msk; |
<> | 144:ef7eb2e8f9f7 | 104 | SYS->IPRST1 &= ~SYS_IPRST1_I2S0RST_Msk; |
<> | 144:ef7eb2e8f9f7 | 105 | } else { |
<> | 144:ef7eb2e8f9f7 | 106 | SYS->IPRST1 |= SYS_IPRST1_I2S1RST_Msk; |
<> | 144:ef7eb2e8f9f7 | 107 | SYS->IPRST1 &= ~SYS_IPRST1_I2S1RST_Msk; |
<> | 144:ef7eb2e8f9f7 | 108 | } |
<> | 144:ef7eb2e8f9f7 | 109 | |
<> | 144:ef7eb2e8f9f7 | 110 | i2s->CTL = u32MasterSlave | u32WordWidth | u32Channels | u32DataFormat | u32AudioInterface | I2S_FIFO_TX_LEVEL_WORD_4 | I2S_FIFO_RX_LEVEL_WORD_4; |
<> | 144:ef7eb2e8f9f7 | 111 | |
<> | 144:ef7eb2e8f9f7 | 112 | u32SrcClk = I2S_GetSourceClockFreq(i2s); |
<> | 144:ef7eb2e8f9f7 | 113 | |
<> | 144:ef7eb2e8f9f7 | 114 | u32BitRate = u32SampleRate * (((u32WordWidth>>4) & 0x3) + 1) * 16; |
<> | 144:ef7eb2e8f9f7 | 115 | u16Divider = ((u32SrcClk/u32BitRate) >> 1) - 1; |
<> | 144:ef7eb2e8f9f7 | 116 | i2s->CLKDIV = (i2s->CLKDIV & ~I2S_CLKDIV_BCLKDIV_Msk) | (u16Divider << 8); |
<> | 144:ef7eb2e8f9f7 | 117 | |
<> | 144:ef7eb2e8f9f7 | 118 | //calculate real sample rate |
<> | 144:ef7eb2e8f9f7 | 119 | u32BitRate = u32SrcClk / (2*(u16Divider+1)); |
<> | 144:ef7eb2e8f9f7 | 120 | u32SampleRate = u32BitRate / ((((u32WordWidth>>4) & 0x3) + 1) * 16); |
<> | 144:ef7eb2e8f9f7 | 121 | |
<> | 144:ef7eb2e8f9f7 | 122 | i2s->CTL |= I2S_CTL_I2SEN_Msk; |
<> | 144:ef7eb2e8f9f7 | 123 | |
<> | 144:ef7eb2e8f9f7 | 124 | return u32SampleRate; |
<> | 144:ef7eb2e8f9f7 | 125 | } |
<> | 144:ef7eb2e8f9f7 | 126 | |
<> | 144:ef7eb2e8f9f7 | 127 | /** |
<> | 144:ef7eb2e8f9f7 | 128 | * @brief Disable I2S function and I2S clock. |
<> | 144:ef7eb2e8f9f7 | 129 | * @param[in] i2s is the base address of I2S module. |
<> | 144:ef7eb2e8f9f7 | 130 | * @return none |
<> | 144:ef7eb2e8f9f7 | 131 | */ |
<> | 144:ef7eb2e8f9f7 | 132 | void I2S_Close(I2S_T *i2s) |
<> | 144:ef7eb2e8f9f7 | 133 | { |
<> | 144:ef7eb2e8f9f7 | 134 | i2s->CTL &= ~I2S_CTL_I2SEN_Msk; |
<> | 144:ef7eb2e8f9f7 | 135 | } |
<> | 144:ef7eb2e8f9f7 | 136 | |
<> | 144:ef7eb2e8f9f7 | 137 | /** |
<> | 144:ef7eb2e8f9f7 | 138 | * @brief This function enables the interrupt according to the mask parameter. |
<> | 144:ef7eb2e8f9f7 | 139 | * @param[in] i2s is the base address of I2S module. |
<> | 144:ef7eb2e8f9f7 | 140 | * @param[in] u32Mask is the combination of all related interrupt enable bits. |
<> | 144:ef7eb2e8f9f7 | 141 | * Each bit corresponds to a interrupt bit. |
<> | 144:ef7eb2e8f9f7 | 142 | * @return none |
<> | 144:ef7eb2e8f9f7 | 143 | */ |
<> | 144:ef7eb2e8f9f7 | 144 | void I2S_EnableInt(I2S_T *i2s, uint32_t u32Mask) |
<> | 144:ef7eb2e8f9f7 | 145 | { |
<> | 144:ef7eb2e8f9f7 | 146 | i2s->IEN |= u32Mask; |
<> | 144:ef7eb2e8f9f7 | 147 | } |
<> | 144:ef7eb2e8f9f7 | 148 | |
<> | 144:ef7eb2e8f9f7 | 149 | /** |
<> | 144:ef7eb2e8f9f7 | 150 | * @brief This function disables the interrupt according to the mask parameter. |
<> | 144:ef7eb2e8f9f7 | 151 | * @param[in] i2s is the base address of I2S module. |
<> | 144:ef7eb2e8f9f7 | 152 | * @param[in] u32Mask is the combination of all related interrupt enable bits. |
<> | 144:ef7eb2e8f9f7 | 153 | * Each bit corresponds to a interrupt bit. |
<> | 144:ef7eb2e8f9f7 | 154 | * @return none |
<> | 144:ef7eb2e8f9f7 | 155 | */ |
<> | 144:ef7eb2e8f9f7 | 156 | void I2S_DisableInt(I2S_T *i2s, uint32_t u32Mask) |
<> | 144:ef7eb2e8f9f7 | 157 | { |
<> | 144:ef7eb2e8f9f7 | 158 | i2s->IEN &= ~u32Mask; |
<> | 144:ef7eb2e8f9f7 | 159 | } |
<> | 144:ef7eb2e8f9f7 | 160 | |
<> | 144:ef7eb2e8f9f7 | 161 | /** |
<> | 144:ef7eb2e8f9f7 | 162 | * @brief Enable MCLK . |
<> | 144:ef7eb2e8f9f7 | 163 | * @param[in] i2s is the base address of I2S module. |
<> | 144:ef7eb2e8f9f7 | 164 | * @param[in] u32BusClock is the target MCLK clock |
<> | 144:ef7eb2e8f9f7 | 165 | * @return Actual MCLK clock |
<> | 144:ef7eb2e8f9f7 | 166 | */ |
<> | 144:ef7eb2e8f9f7 | 167 | uint32_t I2S_EnableMCLK(I2S_T *i2s, uint32_t u32BusClock) |
<> | 144:ef7eb2e8f9f7 | 168 | { |
<> | 144:ef7eb2e8f9f7 | 169 | uint8_t u8Divider; |
<> | 144:ef7eb2e8f9f7 | 170 | uint32_t u32SrcClk, u32Reg; |
<> | 144:ef7eb2e8f9f7 | 171 | |
<> | 144:ef7eb2e8f9f7 | 172 | u32SrcClk = I2S_GetSourceClockFreq(i2s); |
<> | 144:ef7eb2e8f9f7 | 173 | if (u32BusClock == u32SrcClk) |
<> | 144:ef7eb2e8f9f7 | 174 | u8Divider = 0; |
<> | 144:ef7eb2e8f9f7 | 175 | else |
<> | 144:ef7eb2e8f9f7 | 176 | u8Divider = (u32SrcClk/u32BusClock) >> 1; |
<> | 144:ef7eb2e8f9f7 | 177 | |
<> | 144:ef7eb2e8f9f7 | 178 | i2s->CLKDIV = (i2s->CLKDIV & ~I2S_CLKDIV_MCLKDIV_Msk) | u8Divider; |
<> | 144:ef7eb2e8f9f7 | 179 | |
<> | 144:ef7eb2e8f9f7 | 180 | i2s->CTL |= I2S_CTL_MCLKEN_Msk; |
<> | 144:ef7eb2e8f9f7 | 181 | |
<> | 144:ef7eb2e8f9f7 | 182 | u32Reg = i2s->CLKDIV & I2S_CLKDIV_MCLKDIV_Msk; |
<> | 144:ef7eb2e8f9f7 | 183 | |
<> | 144:ef7eb2e8f9f7 | 184 | if (u32Reg == 0) |
<> | 144:ef7eb2e8f9f7 | 185 | return u32SrcClk; |
<> | 144:ef7eb2e8f9f7 | 186 | else |
<> | 144:ef7eb2e8f9f7 | 187 | return ((u32SrcClk >> 1) / u32Reg); |
<> | 144:ef7eb2e8f9f7 | 188 | } |
<> | 144:ef7eb2e8f9f7 | 189 | |
<> | 144:ef7eb2e8f9f7 | 190 | /** |
<> | 144:ef7eb2e8f9f7 | 191 | * @brief Disable MCLK . |
<> | 144:ef7eb2e8f9f7 | 192 | * @param[in] i2s is the base address of I2S module. |
<> | 144:ef7eb2e8f9f7 | 193 | * @return none |
<> | 144:ef7eb2e8f9f7 | 194 | */ |
<> | 144:ef7eb2e8f9f7 | 195 | void I2S_DisableMCLK(I2S_T *i2s) |
<> | 144:ef7eb2e8f9f7 | 196 | { |
<> | 144:ef7eb2e8f9f7 | 197 | i2s->CTL &= ~I2S_CTL_MCLKEN_Msk; |
<> | 144:ef7eb2e8f9f7 | 198 | } |
<> | 144:ef7eb2e8f9f7 | 199 | /*@}*/ /* end of group NUC472_442_I2S_EXPORTED_FUNCTIONS */ |
<> | 144:ef7eb2e8f9f7 | 200 | |
<> | 144:ef7eb2e8f9f7 | 201 | /*@}*/ /* end of group NUC472_442_I2S_Driver */ |
<> | 144:ef7eb2e8f9f7 | 202 | |
<> | 144:ef7eb2e8f9f7 | 203 | /*@}*/ /* end of group NUC472_442_Device_Driver */ |
<> | 144:ef7eb2e8f9f7 | 204 | |
<> | 144:ef7eb2e8f9f7 | 205 | /*** (C) COPYRIGHT 2014 Nuvoton Technology Corp. ***/ |