Frank 26080115
These are the examples provided for [[/users/frank26080115/libraries/LPC1700CMSIS_Lib/]] Note, the entire "program" is not compilable!
I2S/I2S_MCLK/i2s_mclk.c@0:bf7b9fba3924, 2011-03-20 (annotated)
- Committer:
- frank26080115
- Date:
- Sun Mar 20 05:38:56 2011 +0000
- Revision:
- 0:bf7b9fba3924
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| frank26080115 | 0:bf7b9fba3924 | 1 | /***********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 2 | * @file i2s_mclk.c |
| frank26080115 | 0:bf7b9fba3924 | 3 | * @purpose This example describes how to test I2S master clock |
| frank26080115 | 0:bf7b9fba3924 | 4 | * @version 1.0 |
| frank26080115 | 0:bf7b9fba3924 | 5 | * @date 18. June. 2010 |
| frank26080115 | 0:bf7b9fba3924 | 6 | * @author NXP MCU SW Application Team |
| frank26080115 | 0:bf7b9fba3924 | 7 | *--------------------------------------------------------------------- |
| frank26080115 | 0:bf7b9fba3924 | 8 | * Software that is described herein is for illustrative purposes only |
| frank26080115 | 0:bf7b9fba3924 | 9 | * which provides customers with programming information regarding the |
| frank26080115 | 0:bf7b9fba3924 | 10 | * products. This software is supplied "AS IS" without any warranties. |
| frank26080115 | 0:bf7b9fba3924 | 11 | * NXP Semiconductors assumes no responsibility or liability for the |
| frank26080115 | 0:bf7b9fba3924 | 12 | * use of the software, conveys no license or title under any patent, |
| frank26080115 | 0:bf7b9fba3924 | 13 | * copyright, or mask work right to the product. NXP Semiconductors |
| frank26080115 | 0:bf7b9fba3924 | 14 | * reserves the right to make changes in the software without |
| frank26080115 | 0:bf7b9fba3924 | 15 | * notification. NXP Semiconductors also make no representation or |
| frank26080115 | 0:bf7b9fba3924 | 16 | * warranty that such application will be suitable for the specified |
| frank26080115 | 0:bf7b9fba3924 | 17 | * use without further testing or modification. |
| frank26080115 | 0:bf7b9fba3924 | 18 | **********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 19 | #include "lpc17xx_i2s.h" |
| frank26080115 | 0:bf7b9fba3924 | 20 | #include "lpc17xx_libcfg.h" |
| frank26080115 | 0:bf7b9fba3924 | 21 | #include "lpc17xx_pinsel.h" |
| frank26080115 | 0:bf7b9fba3924 | 22 | #include "debug_frmwrk.h" |
| frank26080115 | 0:bf7b9fba3924 | 23 | |
| frank26080115 | 0:bf7b9fba3924 | 24 | /* Example group ----------------------------------------------------------- */ |
| frank26080115 | 0:bf7b9fba3924 | 25 | /** @defgroup I2S_MCLK I2S_MCLK |
| frank26080115 | 0:bf7b9fba3924 | 26 | * @ingroup I2S_Examples |
| frank26080115 | 0:bf7b9fba3924 | 27 | * @{ |
| frank26080115 | 0:bf7b9fba3924 | 28 | */ |
| frank26080115 | 0:bf7b9fba3924 | 29 | |
| frank26080115 | 0:bf7b9fba3924 | 30 | /************************** PRIVATE DEFINITIONS *************************/ |
| frank26080115 | 0:bf7b9fba3924 | 31 | /** Max buffer length */ |
| frank26080115 | 0:bf7b9fba3924 | 32 | #define BUFFER_SIZE 0x400 |
| frank26080115 | 0:bf7b9fba3924 | 33 | /** I2S Buffer Source Address is AHBRAM1_BASE that used for USB RAM purpose, but |
| frank26080115 | 0:bf7b9fba3924 | 34 | * it is not used in this example, so this memory section can be used for general purpose |
| frank26080115 | 0:bf7b9fba3924 | 35 | * memory |
| frank26080115 | 0:bf7b9fba3924 | 36 | */ |
| frank26080115 | 0:bf7b9fba3924 | 37 | #define I2S_BUFFER_SRC LPC_AHBRAM1_BASE //0x20080000 |
| frank26080115 | 0:bf7b9fba3924 | 38 | /** I2S Buffer Destination Address is (AHBRAM1_BASE + 0x100UL) that used for USB RAM purpose, but |
| frank26080115 | 0:bf7b9fba3924 | 39 | * it is not used in this example, so this memory section can be used for general purpose |
| frank26080115 | 0:bf7b9fba3924 | 40 | * memory |
| frank26080115 | 0:bf7b9fba3924 | 41 | */ |
| frank26080115 | 0:bf7b9fba3924 | 42 | #define I2S_BUFFER_DST (I2S_BUFFER_SRC+0x1000UL) //0x20081000 |
| frank26080115 | 0:bf7b9fba3924 | 43 | |
| frank26080115 | 0:bf7b9fba3924 | 44 | #define RXFIFO_EMPTY 0 |
| frank26080115 | 0:bf7b9fba3924 | 45 | #define TXFIFO_FULL 8 |
| frank26080115 | 0:bf7b9fba3924 | 46 | /************************** PRIVATE VARIABLES ***********************/ |
| frank26080115 | 0:bf7b9fba3924 | 47 | uint8_t menu[]= |
| frank26080115 | 0:bf7b9fba3924 | 48 | "********************************************************************************\n\r" |
| frank26080115 | 0:bf7b9fba3924 | 49 | "Hello NXP Semiconductors \n\r" |
| frank26080115 | 0:bf7b9fba3924 | 50 | " I2S MCLK demo \n\r" |
| frank26080115 | 0:bf7b9fba3924 | 51 | "\t - MCU: LPC17xx \n\r" |
| frank26080115 | 0:bf7b9fba3924 | 52 | "\t - Core: ARM CORTEX-M3 \n\r" |
| frank26080115 | 0:bf7b9fba3924 | 53 | "\t - Communicate via: UART0 - 115200 bps \n\r" |
| frank26080115 | 0:bf7b9fba3924 | 54 | " This example describes how to use I2S master clock as I2S clock source\n\r" |
| frank26080115 | 0:bf7b9fba3924 | 55 | "********************************************************************************\n\r"; |
| frank26080115 | 0:bf7b9fba3924 | 56 | |
| frank26080115 | 0:bf7b9fba3924 | 57 | volatile uint8_t I2STXDone = 0; |
| frank26080115 | 0:bf7b9fba3924 | 58 | volatile uint8_t I2SRXDone = 0; |
| frank26080115 | 0:bf7b9fba3924 | 59 | |
| frank26080115 | 0:bf7b9fba3924 | 60 | volatile uint32_t *I2STXBuffer = (uint32_t*)(I2S_BUFFER_SRC); |
| frank26080115 | 0:bf7b9fba3924 | 61 | volatile uint32_t *I2SRXBuffer = (uint32_t *)(I2S_BUFFER_DST); |
| frank26080115 | 0:bf7b9fba3924 | 62 | |
| frank26080115 | 0:bf7b9fba3924 | 63 | volatile uint32_t I2SReadLength = 0; |
| frank26080115 | 0:bf7b9fba3924 | 64 | volatile uint32_t I2SWriteLength = 0; |
| frank26080115 | 0:bf7b9fba3924 | 65 | |
| frank26080115 | 0:bf7b9fba3924 | 66 | uint8_t tx_depth_irq = 0; |
| frank26080115 | 0:bf7b9fba3924 | 67 | uint8_t rx_depth_irq = 0; |
| frank26080115 | 0:bf7b9fba3924 | 68 | uint8_t dummy=0; |
| frank26080115 | 0:bf7b9fba3924 | 69 | |
| frank26080115 | 0:bf7b9fba3924 | 70 | |
| frank26080115 | 0:bf7b9fba3924 | 71 | /************************** PRIVATE FUNCTIONS *************************/ |
| frank26080115 | 0:bf7b9fba3924 | 72 | void I2S_IRQHandler(void); |
| frank26080115 | 0:bf7b9fba3924 | 73 | |
| frank26080115 | 0:bf7b9fba3924 | 74 | void Buffer_Init(void); |
| frank26080115 | 0:bf7b9fba3924 | 75 | Bool Buffer_Verify(void); |
| frank26080115 | 0:bf7b9fba3924 | 76 | void print_menu(void); |
| frank26080115 | 0:bf7b9fba3924 | 77 | |
| frank26080115 | 0:bf7b9fba3924 | 78 | /*----------------- INTERRUPT SERVICE ROUTINES --------------------------*/ |
| frank26080115 | 0:bf7b9fba3924 | 79 | /*********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 80 | * @brief I2S IRQ Handler |
| frank26080115 | 0:bf7b9fba3924 | 81 | * @param[in] None |
| frank26080115 | 0:bf7b9fba3924 | 82 | * @return None |
| frank26080115 | 0:bf7b9fba3924 | 83 | **********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 84 | void I2S_IRQHandler() |
| frank26080115 | 0:bf7b9fba3924 | 85 | { |
| frank26080115 | 0:bf7b9fba3924 | 86 | uint32_t RXLevel = 0; |
| frank26080115 | 0:bf7b9fba3924 | 87 | |
| frank26080115 | 0:bf7b9fba3924 | 88 | //Check RX interrupt |
| frank26080115 | 0:bf7b9fba3924 | 89 | if(I2S_GetIRQStatus(LPC_I2S, I2S_RX_MODE)) |
| frank26080115 | 0:bf7b9fba3924 | 90 | { |
| frank26080115 | 0:bf7b9fba3924 | 91 | RXLevel = I2S_GetLevel(LPC_I2S, I2S_RX_MODE); |
| frank26080115 | 0:bf7b9fba3924 | 92 | if ( (RXLevel != RXFIFO_EMPTY) && !I2SRXDone ) |
| frank26080115 | 0:bf7b9fba3924 | 93 | { |
| frank26080115 | 0:bf7b9fba3924 | 94 | while ( RXLevel > 0 ) |
| frank26080115 | 0:bf7b9fba3924 | 95 | { |
| frank26080115 | 0:bf7b9fba3924 | 96 | if ( I2SReadLength == BUFFER_SIZE ) |
| frank26080115 | 0:bf7b9fba3924 | 97 | { |
| frank26080115 | 0:bf7b9fba3924 | 98 | //Stop RX |
| frank26080115 | 0:bf7b9fba3924 | 99 | I2S_Stop(LPC_I2S, I2S_RX_MODE); |
| frank26080115 | 0:bf7b9fba3924 | 100 | // Disable RX |
| frank26080115 | 0:bf7b9fba3924 | 101 | I2S_IRQCmd(LPC_I2S, I2S_RX_MODE, DISABLE); |
| frank26080115 | 0:bf7b9fba3924 | 102 | I2SRXDone = 1; |
| frank26080115 | 0:bf7b9fba3924 | 103 | break; |
| frank26080115 | 0:bf7b9fba3924 | 104 | } |
| frank26080115 | 0:bf7b9fba3924 | 105 | else |
| frank26080115 | 0:bf7b9fba3924 | 106 | { |
| frank26080115 | 0:bf7b9fba3924 | 107 | I2SRXBuffer[I2SReadLength++] = LPC_I2S->I2SRXFIFO; |
| frank26080115 | 0:bf7b9fba3924 | 108 | } |
| frank26080115 | 0:bf7b9fba3924 | 109 | RXLevel--; |
| frank26080115 | 0:bf7b9fba3924 | 110 | } |
| frank26080115 | 0:bf7b9fba3924 | 111 | } |
| frank26080115 | 0:bf7b9fba3924 | 112 | } |
| frank26080115 | 0:bf7b9fba3924 | 113 | return; |
| frank26080115 | 0:bf7b9fba3924 | 114 | } |
| frank26080115 | 0:bf7b9fba3924 | 115 | |
| frank26080115 | 0:bf7b9fba3924 | 116 | /*-------------------------PRIVATE FUNCTIONS------------------------------*/ |
| frank26080115 | 0:bf7b9fba3924 | 117 | /*********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 118 | * @brief Initialize buffer |
| frank26080115 | 0:bf7b9fba3924 | 119 | * @param[in] None |
| frank26080115 | 0:bf7b9fba3924 | 120 | * @return None |
| frank26080115 | 0:bf7b9fba3924 | 121 | **********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 122 | void Buffer_Init(void) { |
| frank26080115 | 0:bf7b9fba3924 | 123 | uint32_t i; |
| frank26080115 | 0:bf7b9fba3924 | 124 | for ( i = 0; i < BUFFER_SIZE; i++ ) /* clear buffer */ |
| frank26080115 | 0:bf7b9fba3924 | 125 | { |
| frank26080115 | 0:bf7b9fba3924 | 126 | I2STXBuffer[i] = i; |
| frank26080115 | 0:bf7b9fba3924 | 127 | I2SRXBuffer[i] = 0; |
| frank26080115 | 0:bf7b9fba3924 | 128 | } |
| frank26080115 | 0:bf7b9fba3924 | 129 | |
| frank26080115 | 0:bf7b9fba3924 | 130 | } |
| frank26080115 | 0:bf7b9fba3924 | 131 | |
| frank26080115 | 0:bf7b9fba3924 | 132 | /*********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 133 | * @brief Verify buffer |
| frank26080115 | 0:bf7b9fba3924 | 134 | * @param[in] none |
| frank26080115 | 0:bf7b9fba3924 | 135 | * @return TRUE - if two buffers are similar |
| frank26080115 | 0:bf7b9fba3924 | 136 | * FALSE - if two buffers are different |
| frank26080115 | 0:bf7b9fba3924 | 137 | **********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 138 | Bool Buffer_Verify(void) { |
| frank26080115 | 0:bf7b9fba3924 | 139 | uint32_t i; |
| frank26080115 | 0:bf7b9fba3924 | 140 | uint32_t *pTX = (uint32_t *) &I2STXBuffer[0]; |
| frank26080115 | 0:bf7b9fba3924 | 141 | uint32_t *pRX = (uint32_t *) &I2SRXBuffer[1]; |
| frank26080115 | 0:bf7b9fba3924 | 142 | /* Because first element of RX is dummy 0 value, so we just verify |
| frank26080115 | 0:bf7b9fba3924 | 143 | * from 2nd element |
| frank26080115 | 0:bf7b9fba3924 | 144 | */ |
| frank26080115 | 0:bf7b9fba3924 | 145 | for (i = 1; i < BUFFER_SIZE; i++) { |
| frank26080115 | 0:bf7b9fba3924 | 146 | if (*pTX++ != *pRX++) { |
| frank26080115 | 0:bf7b9fba3924 | 147 | return FALSE; |
| frank26080115 | 0:bf7b9fba3924 | 148 | } |
| frank26080115 | 0:bf7b9fba3924 | 149 | } |
| frank26080115 | 0:bf7b9fba3924 | 150 | return TRUE; |
| frank26080115 | 0:bf7b9fba3924 | 151 | } |
| frank26080115 | 0:bf7b9fba3924 | 152 | /*********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 153 | * @brief print menu |
| frank26080115 | 0:bf7b9fba3924 | 154 | * @param[in] none |
| frank26080115 | 0:bf7b9fba3924 | 155 | * @return None |
| frank26080115 | 0:bf7b9fba3924 | 156 | **********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 157 | void print_menu(void) |
| frank26080115 | 0:bf7b9fba3924 | 158 | { |
| frank26080115 | 0:bf7b9fba3924 | 159 | _DBG_(menu); |
| frank26080115 | 0:bf7b9fba3924 | 160 | } |
| frank26080115 | 0:bf7b9fba3924 | 161 | |
| frank26080115 | 0:bf7b9fba3924 | 162 | |
| frank26080115 | 0:bf7b9fba3924 | 163 | /*-------------------------MAIN FUNCTION------------------------------*/ |
| frank26080115 | 0:bf7b9fba3924 | 164 | /*********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 165 | * @brief c_entry: Main program body |
| frank26080115 | 0:bf7b9fba3924 | 166 | * @param[in] None |
| frank26080115 | 0:bf7b9fba3924 | 167 | * @return int |
| frank26080115 | 0:bf7b9fba3924 | 168 | **********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 169 | int c_entry (void) { /* Main Program */ |
| frank26080115 | 0:bf7b9fba3924 | 170 | I2S_MODEConf_Type I2S_ClkConfig; |
| frank26080115 | 0:bf7b9fba3924 | 171 | I2S_CFG_Type I2S_ConfigStruct; |
| frank26080115 | 0:bf7b9fba3924 | 172 | PINSEL_CFG_Type PinCfg; |
| frank26080115 | 0:bf7b9fba3924 | 173 | |
| frank26080115 | 0:bf7b9fba3924 | 174 | uint32_t i; |
| frank26080115 | 0:bf7b9fba3924 | 175 | /* Initialize debug via UART0 |
| frank26080115 | 0:bf7b9fba3924 | 176 | * 115200bps |
| frank26080115 | 0:bf7b9fba3924 | 177 | * 8 data bit |
| frank26080115 | 0:bf7b9fba3924 | 178 | * No parity |
| frank26080115 | 0:bf7b9fba3924 | 179 | * 1 stop bit |
| frank26080115 | 0:bf7b9fba3924 | 180 | * No flow control |
| frank26080115 | 0:bf7b9fba3924 | 181 | */ |
| frank26080115 | 0:bf7b9fba3924 | 182 | debug_frmwrk_init(); |
| frank26080115 | 0:bf7b9fba3924 | 183 | |
| frank26080115 | 0:bf7b9fba3924 | 184 | //print menu screen |
| frank26080115 | 0:bf7b9fba3924 | 185 | print_menu(); |
| frank26080115 | 0:bf7b9fba3924 | 186 | /* Initialize I2S peripheral ------------------------------------*/ |
| frank26080115 | 0:bf7b9fba3924 | 187 | /* Pin configuration: |
| frank26080115 | 0:bf7b9fba3924 | 188 | * Assign: - P0.4 as I2SRX_CLK |
| frank26080115 | 0:bf7b9fba3924 | 189 | * - P0.5 as I2SRX_WS |
| frank26080115 | 0:bf7b9fba3924 | 190 | * - P0.6 as I2SRX_SDA |
| frank26080115 | 0:bf7b9fba3924 | 191 | * - P0.7 as I2STX_CLK |
| frank26080115 | 0:bf7b9fba3924 | 192 | * - P0.8 as I2STX_WS |
| frank26080115 | 0:bf7b9fba3924 | 193 | * - P0.9 as I2STX_SDA |
| frank26080115 | 0:bf7b9fba3924 | 194 | */ |
| frank26080115 | 0:bf7b9fba3924 | 195 | PinCfg.Funcnum = 1; |
| frank26080115 | 0:bf7b9fba3924 | 196 | PinCfg.OpenDrain = 0; |
| frank26080115 | 0:bf7b9fba3924 | 197 | PinCfg.Pinmode = 0; |
| frank26080115 | 0:bf7b9fba3924 | 198 | PinCfg.Pinnum = 4; |
| frank26080115 | 0:bf7b9fba3924 | 199 | PinCfg.Portnum = 0; |
| frank26080115 | 0:bf7b9fba3924 | 200 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 201 | PinCfg.Pinnum = 5; |
| frank26080115 | 0:bf7b9fba3924 | 202 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 203 | PinCfg.Pinnum = 6; |
| frank26080115 | 0:bf7b9fba3924 | 204 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 205 | PinCfg.Pinnum = 7; |
| frank26080115 | 0:bf7b9fba3924 | 206 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 207 | PinCfg.Pinnum = 8; |
| frank26080115 | 0:bf7b9fba3924 | 208 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 209 | PinCfg.Pinnum = 9; |
| frank26080115 | 0:bf7b9fba3924 | 210 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 211 | |
| frank26080115 | 0:bf7b9fba3924 | 212 | /* P4.29 as TX_MCLK */ |
| frank26080115 | 0:bf7b9fba3924 | 213 | PinCfg.Funcnum = 1; |
| frank26080115 | 0:bf7b9fba3924 | 214 | PinCfg.OpenDrain = 0; |
| frank26080115 | 0:bf7b9fba3924 | 215 | PinCfg.Pinmode = 0; |
| frank26080115 | 0:bf7b9fba3924 | 216 | PinCfg.Pinnum = 29; |
| frank26080115 | 0:bf7b9fba3924 | 217 | PinCfg.Portnum = 4; |
| frank26080115 | 0:bf7b9fba3924 | 218 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 219 | |
| frank26080115 | 0:bf7b9fba3924 | 220 | Buffer_Init(); |
| frank26080115 | 0:bf7b9fba3924 | 221 | |
| frank26080115 | 0:bf7b9fba3924 | 222 | I2S_Init(LPC_I2S); |
| frank26080115 | 0:bf7b9fba3924 | 223 | |
| frank26080115 | 0:bf7b9fba3924 | 224 | /* setup: |
| frank26080115 | 0:bf7b9fba3924 | 225 | * - wordwidth: 16 bits |
| frank26080115 | 0:bf7b9fba3924 | 226 | * - stereo mode |
| frank26080115 | 0:bf7b9fba3924 | 227 | * - master mode for I2S_TX and slave for I2S_RX |
| frank26080115 | 0:bf7b9fba3924 | 228 | * - ws_halfperiod is 31 |
| frank26080115 | 0:bf7b9fba3924 | 229 | * - not use mute mode |
| frank26080115 | 0:bf7b9fba3924 | 230 | * - use reset and stop mode |
| frank26080115 | 0:bf7b9fba3924 | 231 | * - select the fractional rate divider clock output as the source, |
| frank26080115 | 0:bf7b9fba3924 | 232 | * - disable 4-pin mode |
| frank26080115 | 0:bf7b9fba3924 | 233 | * - MCLK ouput is disable |
| frank26080115 | 0:bf7b9fba3924 | 234 | * - Frequency = 44.1 kHz |
| frank26080115 | 0:bf7b9fba3924 | 235 | * Because we use mode I2STXMODE[3:0]= 0000, I2SDAO[5]=0 and |
| frank26080115 | 0:bf7b9fba3924 | 236 | * I2SRX[3:0]=0000, I2SDAI[5] = 1. So we have I2SRX_CLK = I2STX_CLK |
| frank26080115 | 0:bf7b9fba3924 | 237 | * --> I2SRXBITRATE = 1 (not divide TXCLK to produce RXCLK) |
| frank26080115 | 0:bf7b9fba3924 | 238 | */ |
| frank26080115 | 0:bf7b9fba3924 | 239 | |
| frank26080115 | 0:bf7b9fba3924 | 240 | /* Audio Config*/ |
| frank26080115 | 0:bf7b9fba3924 | 241 | I2S_ConfigStruct.wordwidth = I2S_WORDWIDTH_16; |
| frank26080115 | 0:bf7b9fba3924 | 242 | I2S_ConfigStruct.mono = I2S_STEREO; |
| frank26080115 | 0:bf7b9fba3924 | 243 | I2S_ConfigStruct.stop = I2S_STOP_ENABLE; |
| frank26080115 | 0:bf7b9fba3924 | 244 | I2S_ConfigStruct.reset = I2S_RESET_ENABLE; |
| frank26080115 | 0:bf7b9fba3924 | 245 | I2S_ConfigStruct.ws_sel = I2S_MASTER_MODE; |
| frank26080115 | 0:bf7b9fba3924 | 246 | I2S_ConfigStruct.mute = I2S_MUTE_DISABLE; |
| frank26080115 | 0:bf7b9fba3924 | 247 | I2S_Config(LPC_I2S,I2S_TX_MODE,&I2S_ConfigStruct); |
| frank26080115 | 0:bf7b9fba3924 | 248 | |
| frank26080115 | 0:bf7b9fba3924 | 249 | I2S_ConfigStruct.ws_sel = I2S_SLAVE_MODE; |
| frank26080115 | 0:bf7b9fba3924 | 250 | I2S_Config(LPC_I2S,I2S_RX_MODE,&I2S_ConfigStruct); |
| frank26080115 | 0:bf7b9fba3924 | 251 | |
| frank26080115 | 0:bf7b9fba3924 | 252 | I2S_Stop(LPC_I2S, I2S_TX_MODE); |
| frank26080115 | 0:bf7b9fba3924 | 253 | I2S_Stop(LPC_I2S, I2S_RX_MODE); |
| frank26080115 | 0:bf7b9fba3924 | 254 | |
| frank26080115 | 0:bf7b9fba3924 | 255 | /* Clock Mode Config |
| frank26080115 | 0:bf7b9fba3924 | 256 | * I2S transmitter: |
| frank26080115 | 0:bf7b9fba3924 | 257 | * - Select TX fractional rate divider clock ouput as the source |
| frank26080115 | 0:bf7b9fba3924 | 258 | * - Disable 4-wire mode |
| frank26080115 | 0:bf7b9fba3924 | 259 | * - Enable for the TX_MCLK output (optional, this setting just for |
| frank26080115 | 0:bf7b9fba3924 | 260 | * user can observe master clock on oscilloscope) |
| frank26080115 | 0:bf7b9fba3924 | 261 | * I2S receiver: |
| frank26080115 | 0:bf7b9fba3924 | 262 | * - Select TX_MCLK signal as the RX_MCLK clock source |
| frank26080115 | 0:bf7b9fba3924 | 263 | * - Disable 4-wire mode |
| frank26080115 | 0:bf7b9fba3924 | 264 | * - Disable for the RX_MCLK output |
| frank26080115 | 0:bf7b9fba3924 | 265 | */ |
| frank26080115 | 0:bf7b9fba3924 | 266 | I2S_ClkConfig.clksel = I2S_CLKSEL_FRDCLK; |
| frank26080115 | 0:bf7b9fba3924 | 267 | I2S_ClkConfig.fpin = I2S_4PIN_DISABLE; |
| frank26080115 | 0:bf7b9fba3924 | 268 | I2S_ClkConfig.mcena = I2S_MCLK_ENABLE; |
| frank26080115 | 0:bf7b9fba3924 | 269 | I2S_ModeConfig(LPC_I2S,&I2S_ClkConfig,I2S_TX_MODE); |
| frank26080115 | 0:bf7b9fba3924 | 270 | |
| frank26080115 | 0:bf7b9fba3924 | 271 | I2S_ClkConfig.clksel = I2S_CLKSEL_MCLK; |
| frank26080115 | 0:bf7b9fba3924 | 272 | I2S_ClkConfig.mcena = I2S_MCLK_DISABLE; |
| frank26080115 | 0:bf7b9fba3924 | 273 | I2S_ModeConfig(LPC_I2S,&I2S_ClkConfig,I2S_RX_MODE); |
| frank26080115 | 0:bf7b9fba3924 | 274 | |
| frank26080115 | 0:bf7b9fba3924 | 275 | I2S_FreqConfig(LPC_I2S, 44100, I2S_TX_MODE); |
| frank26080115 | 0:bf7b9fba3924 | 276 | I2S_FreqConfig(LPC_I2S, 44100, I2S_RX_MODE); |
| frank26080115 | 0:bf7b9fba3924 | 277 | |
| frank26080115 | 0:bf7b9fba3924 | 278 | NVIC_EnableIRQ(I2S_IRQn); |
| frank26080115 | 0:bf7b9fba3924 | 279 | |
| frank26080115 | 0:bf7b9fba3924 | 280 | /* RX FIFO depth is 1, TX FIFO depth is 8. */ |
| frank26080115 | 0:bf7b9fba3924 | 281 | I2S_IRQConfig(LPC_I2S,I2S_TX_MODE,8); |
| frank26080115 | 0:bf7b9fba3924 | 282 | I2S_IRQConfig(LPC_I2S,I2S_RX_MODE,1); |
| frank26080115 | 0:bf7b9fba3924 | 283 | I2S_IRQCmd(LPC_I2S,I2S_RX_MODE,ENABLE); |
| frank26080115 | 0:bf7b9fba3924 | 284 | I2S_Start(LPC_I2S); |
| frank26080115 | 0:bf7b9fba3924 | 285 | |
| frank26080115 | 0:bf7b9fba3924 | 286 | /* I2S transmit ---------------------------------------------------*/ |
| frank26080115 | 0:bf7b9fba3924 | 287 | while ( I2SWriteLength < BUFFER_SIZE ) |
| frank26080115 | 0:bf7b9fba3924 | 288 | { |
| frank26080115 | 0:bf7b9fba3924 | 289 | while(I2S_GetLevel(LPC_I2S, I2S_TX_MODE)==TXFIFO_FULL); |
| frank26080115 | 0:bf7b9fba3924 | 290 | I2S_Send(LPC_I2S, I2STXBuffer[I2SWriteLength++]); |
| frank26080115 | 0:bf7b9fba3924 | 291 | } |
| frank26080115 | 0:bf7b9fba3924 | 292 | |
| frank26080115 | 0:bf7b9fba3924 | 293 | I2STXDone = 1; |
| frank26080115 | 0:bf7b9fba3924 | 294 | |
| frank26080115 | 0:bf7b9fba3924 | 295 | /* Wait for transmit/receive complete */ |
| frank26080115 | 0:bf7b9fba3924 | 296 | while ( !I2SRXDone || !I2STXDone ); |
| frank26080115 | 0:bf7b9fba3924 | 297 | for(i=0;i<BUFFER_SIZE;i++) |
| frank26080115 | 0:bf7b9fba3924 | 298 | { |
| frank26080115 | 0:bf7b9fba3924 | 299 | _DBH32(I2SRXBuffer[i]);_DBG_(""); |
| frank26080115 | 0:bf7b9fba3924 | 300 | } |
| frank26080115 | 0:bf7b9fba3924 | 301 | /* Verify RX and TX Buffer */ |
| frank26080115 | 0:bf7b9fba3924 | 302 | if(Buffer_Verify()) |
| frank26080115 | 0:bf7b9fba3924 | 303 | { |
| frank26080115 | 0:bf7b9fba3924 | 304 | _DBG_("Verify Buffer: OK..."); |
| frank26080115 | 0:bf7b9fba3924 | 305 | } |
| frank26080115 | 0:bf7b9fba3924 | 306 | else |
| frank26080115 | 0:bf7b9fba3924 | 307 | { |
| frank26080115 | 0:bf7b9fba3924 | 308 | _DBG_("Verify Buffer: ERROR..."); |
| frank26080115 | 0:bf7b9fba3924 | 309 | } |
| frank26080115 | 0:bf7b9fba3924 | 310 | while(1); |
| frank26080115 | 0:bf7b9fba3924 | 311 | return 0; |
| frank26080115 | 0:bf7b9fba3924 | 312 | } |
| frank26080115 | 0:bf7b9fba3924 | 313 | |
| frank26080115 | 0:bf7b9fba3924 | 314 | /* With ARM and GHS toolsets, the entry point is main() - this will |
| frank26080115 | 0:bf7b9fba3924 | 315 | allow the linker to generate wrapper code to setup stacks, allocate |
| frank26080115 | 0:bf7b9fba3924 | 316 | heap area, and initialize and copy code and data segments. For GNU |
| frank26080115 | 0:bf7b9fba3924 | 317 | toolsets, the entry point is through __start() in the crt0_gnu.asm |
| frank26080115 | 0:bf7b9fba3924 | 318 | file, and that startup code will setup stacks and data */ |
| frank26080115 | 0:bf7b9fba3924 | 319 | int main(void) |
| frank26080115 | 0:bf7b9fba3924 | 320 | { |
| frank26080115 | 0:bf7b9fba3924 | 321 | return c_entry(); |
| frank26080115 | 0:bf7b9fba3924 | 322 | } |
| frank26080115 | 0:bf7b9fba3924 | 323 | |
| frank26080115 | 0:bf7b9fba3924 | 324 | #ifdef DEBUG |
| frank26080115 | 0:bf7b9fba3924 | 325 | /******************************************************************************* |
| frank26080115 | 0:bf7b9fba3924 | 326 | * @brief Reports the name of the source file and the source line number |
| frank26080115 | 0:bf7b9fba3924 | 327 | * where the CHECK_PARAM error has occurred. |
| frank26080115 | 0:bf7b9fba3924 | 328 | * @param[in] file Pointer to the source file name |
| frank26080115 | 0:bf7b9fba3924 | 329 | * @param[in] line assert_param error line source number |
| frank26080115 | 0:bf7b9fba3924 | 330 | * @return None |
| frank26080115 | 0:bf7b9fba3924 | 331 | *******************************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 332 | void check_failed(uint8_t *file, uint32_t line) |
| frank26080115 | 0:bf7b9fba3924 | 333 | { |
| frank26080115 | 0:bf7b9fba3924 | 334 | /* User can add his own implementation to report the file name and line number, |
| frank26080115 | 0:bf7b9fba3924 | 335 | ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ |
| frank26080115 | 0:bf7b9fba3924 | 336 | |
| frank26080115 | 0:bf7b9fba3924 | 337 | /* Infinite loop */ |
| frank26080115 | 0:bf7b9fba3924 | 338 | while(1); |
| frank26080115 | 0:bf7b9fba3924 | 339 | } |
| frank26080115 | 0:bf7b9fba3924 | 340 | #endif |
| frank26080115 | 0:bf7b9fba3924 | 341 | |
| frank26080115 | 0:bf7b9fba3924 | 342 | /* |
| frank26080115 | 0:bf7b9fba3924 | 343 | * @} |
| frank26080115 | 0:bf7b9fba3924 | 344 | */ |