Frank 26080115
These are the examples provided for [[/users/frank26080115/libraries/LPC1700CMSIS_Lib/]] Note, the entire "program" is not compilable!
EMAC/Easy_Web/EMAC.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 | ***** ***** |
| frank26080115 | 0:bf7b9fba3924 | 3 | ***** Name: cs8900.c ***** |
| frank26080115 | 0:bf7b9fba3924 | 4 | ***** Ver.: 1.0 ***** |
| frank26080115 | 0:bf7b9fba3924 | 5 | ***** Date: 07/05/2001 ***** |
| frank26080115 | 0:bf7b9fba3924 | 6 | ***** Auth: Andreas Dannenberg ***** |
| frank26080115 | 0:bf7b9fba3924 | 7 | ***** HTWK Leipzig ***** |
| frank26080115 | 0:bf7b9fba3924 | 8 | ***** university of applied sciences ***** |
| frank26080115 | 0:bf7b9fba3924 | 9 | ***** Germany ***** |
| frank26080115 | 0:bf7b9fba3924 | 10 | ***** Func: ethernet packet-driver for use with LAN- ***** |
| frank26080115 | 0:bf7b9fba3924 | 11 | ***** controller CS8900 from Crystal/Cirrus Logic ***** |
| frank26080115 | 0:bf7b9fba3924 | 12 | ***** ***** |
| frank26080115 | 0:bf7b9fba3924 | 13 | ***** NXP: Module modified for use with NXP ***** |
| frank26080115 | 0:bf7b9fba3924 | 14 | ***** LPC1768 EMAC Ethernet controller ***** |
| frank26080115 | 0:bf7b9fba3924 | 15 | ***** ***** |
| frank26080115 | 0:bf7b9fba3924 | 16 | ******************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 17 | |
| frank26080115 | 0:bf7b9fba3924 | 18 | #include "EMAC.h" |
| frank26080115 | 0:bf7b9fba3924 | 19 | #include "tcpip.h" |
| frank26080115 | 0:bf7b9fba3924 | 20 | #include "lpc17xx_emac.h" |
| frank26080115 | 0:bf7b9fba3924 | 21 | #include "lpc17xx_pinsel.h" |
| frank26080115 | 0:bf7b9fba3924 | 22 | |
| frank26080115 | 0:bf7b9fba3924 | 23 | /* For debugging... */ |
| frank26080115 | 0:bf7b9fba3924 | 24 | #include "debug_frmwrk.h" |
| frank26080115 | 0:bf7b9fba3924 | 25 | #include <stdio.h> |
| frank26080115 | 0:bf7b9fba3924 | 26 | #define DB _DBG((uint8_t *)db) |
| frank26080115 | 0:bf7b9fba3924 | 27 | char db[64]; |
| frank26080115 | 0:bf7b9fba3924 | 28 | |
| frank26080115 | 0:bf7b9fba3924 | 29 | static unsigned short *rptr; |
| frank26080115 | 0:bf7b9fba3924 | 30 | static unsigned short *tptr; |
| frank26080115 | 0:bf7b9fba3924 | 31 | |
| frank26080115 | 0:bf7b9fba3924 | 32 | /* |
| frank26080115 | 0:bf7b9fba3924 | 33 | * NXP: Here AHBRAM1 section still not be used, so a mount of this section |
| frank26080115 | 0:bf7b9fba3924 | 34 | * will be used to store buffer data get from receive packet buffer of EMAC |
| frank26080115 | 0:bf7b9fba3924 | 35 | */ |
| frank26080115 | 0:bf7b9fba3924 | 36 | static unsigned short *pgBuf = (unsigned short *)LPC_AHBRAM1_BASE; |
| frank26080115 | 0:bf7b9fba3924 | 37 | |
| frank26080115 | 0:bf7b9fba3924 | 38 | // configure port-pins for use with LAN-controller, |
| frank26080115 | 0:bf7b9fba3924 | 39 | // reset it and send the configuration-sequence |
| frank26080115 | 0:bf7b9fba3924 | 40 | void Init_EMAC(void) |
| frank26080115 | 0:bf7b9fba3924 | 41 | { |
| frank26080115 | 0:bf7b9fba3924 | 42 | uint32_t delay; |
| frank26080115 | 0:bf7b9fba3924 | 43 | |
| frank26080115 | 0:bf7b9fba3924 | 44 | /* EMAC configuration type */ |
| frank26080115 | 0:bf7b9fba3924 | 45 | EMAC_CFG_Type Emac_Config; |
| frank26080115 | 0:bf7b9fba3924 | 46 | /* pin configuration */ |
| frank26080115 | 0:bf7b9fba3924 | 47 | PINSEL_CFG_Type PinCfg; |
| frank26080115 | 0:bf7b9fba3924 | 48 | |
| frank26080115 | 0:bf7b9fba3924 | 49 | /* EMAC address */ |
| frank26080115 | 0:bf7b9fba3924 | 50 | uint8_t EMACAddr[] = {MYMAC_1, MYMAC_2, MYMAC_3, MYMAC_4, MYMAC_5, MYMAC_6}; |
| frank26080115 | 0:bf7b9fba3924 | 51 | |
| frank26080115 | 0:bf7b9fba3924 | 52 | /* |
| frank26080115 | 0:bf7b9fba3924 | 53 | * Enable P1 Ethernet Pins: |
| frank26080115 | 0:bf7b9fba3924 | 54 | * P1.0 - ENET_TXD0 |
| frank26080115 | 0:bf7b9fba3924 | 55 | * P1.1 - ENET_TXD1 |
| frank26080115 | 0:bf7b9fba3924 | 56 | * P1.4 - ENET_TX_EN |
| frank26080115 | 0:bf7b9fba3924 | 57 | * P1.8 - ENET_CRS |
| frank26080115 | 0:bf7b9fba3924 | 58 | * P1.9 - ENET_RXD0 |
| frank26080115 | 0:bf7b9fba3924 | 59 | * P1.10 - ENET_RXD1 |
| frank26080115 | 0:bf7b9fba3924 | 60 | * P1.14 - ENET_RX_ER |
| frank26080115 | 0:bf7b9fba3924 | 61 | * P1.15 - ENET_REF_CLK |
| frank26080115 | 0:bf7b9fba3924 | 62 | * P1.16 - ENET_MDC |
| frank26080115 | 0:bf7b9fba3924 | 63 | * P1.17 - ENET_MDIO |
| frank26080115 | 0:bf7b9fba3924 | 64 | */ |
| frank26080115 | 0:bf7b9fba3924 | 65 | PinCfg.Funcnum = 1; |
| frank26080115 | 0:bf7b9fba3924 | 66 | PinCfg.OpenDrain = 0; |
| frank26080115 | 0:bf7b9fba3924 | 67 | PinCfg.Pinmode = 0; |
| frank26080115 | 0:bf7b9fba3924 | 68 | PinCfg.Portnum = 1; |
| frank26080115 | 0:bf7b9fba3924 | 69 | |
| frank26080115 | 0:bf7b9fba3924 | 70 | PinCfg.Pinnum = 0; |
| frank26080115 | 0:bf7b9fba3924 | 71 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 72 | PinCfg.Pinnum = 1; |
| frank26080115 | 0:bf7b9fba3924 | 73 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 74 | PinCfg.Pinnum = 4; |
| frank26080115 | 0:bf7b9fba3924 | 75 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 76 | PinCfg.Pinnum = 8; |
| frank26080115 | 0:bf7b9fba3924 | 77 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 78 | PinCfg.Pinnum = 9; |
| frank26080115 | 0:bf7b9fba3924 | 79 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 80 | PinCfg.Pinnum = 10; |
| frank26080115 | 0:bf7b9fba3924 | 81 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 82 | PinCfg.Pinnum = 14; |
| frank26080115 | 0:bf7b9fba3924 | 83 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 84 | PinCfg.Pinnum = 15; |
| frank26080115 | 0:bf7b9fba3924 | 85 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 86 | PinCfg.Pinnum = 16; |
| frank26080115 | 0:bf7b9fba3924 | 87 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 88 | PinCfg.Pinnum = 17; |
| frank26080115 | 0:bf7b9fba3924 | 89 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 90 | |
| frank26080115 | 0:bf7b9fba3924 | 91 | _DBG_("Init EMAC module"); |
| frank26080115 | 0:bf7b9fba3924 | 92 | sprintf(db,"MAC addr: %X-%X-%X-%X-%X-%X \n\r", \ |
| frank26080115 | 0:bf7b9fba3924 | 93 | EMACAddr[0], EMACAddr[1], EMACAddr[2], \ |
| frank26080115 | 0:bf7b9fba3924 | 94 | EMACAddr[3], EMACAddr[4], EMACAddr[5]); |
| frank26080115 | 0:bf7b9fba3924 | 95 | DB; |
| frank26080115 | 0:bf7b9fba3924 | 96 | |
| frank26080115 | 0:bf7b9fba3924 | 97 | Emac_Config.Mode = EMAC_MODE_AUTO; |
| frank26080115 | 0:bf7b9fba3924 | 98 | Emac_Config.pbEMAC_Addr = EMACAddr; |
| frank26080115 | 0:bf7b9fba3924 | 99 | // Initialize EMAC module with given parameter |
| frank26080115 | 0:bf7b9fba3924 | 100 | while (EMAC_Init(&Emac_Config) == ERROR){ |
| frank26080115 | 0:bf7b9fba3924 | 101 | // Delay for a while then continue initializing EMAC module |
| frank26080115 | 0:bf7b9fba3924 | 102 | _DBG_("Error during initializing EMAC, restart after a while"); |
| frank26080115 | 0:bf7b9fba3924 | 103 | for (delay = 0x100000; delay; delay--); |
| frank26080115 | 0:bf7b9fba3924 | 104 | } |
| frank26080115 | 0:bf7b9fba3924 | 105 | _DBG_("Init EMAC complete"); |
| frank26080115 | 0:bf7b9fba3924 | 106 | } |
| frank26080115 | 0:bf7b9fba3924 | 107 | |
| frank26080115 | 0:bf7b9fba3924 | 108 | |
| frank26080115 | 0:bf7b9fba3924 | 109 | // reads a word in little-endian byte order from RX_BUFFER |
| frank26080115 | 0:bf7b9fba3924 | 110 | |
| frank26080115 | 0:bf7b9fba3924 | 111 | unsigned short ReadFrame_EMAC(void) |
| frank26080115 | 0:bf7b9fba3924 | 112 | { |
| frank26080115 | 0:bf7b9fba3924 | 113 | return (*rptr++); |
| frank26080115 | 0:bf7b9fba3924 | 114 | } |
| frank26080115 | 0:bf7b9fba3924 | 115 | |
| frank26080115 | 0:bf7b9fba3924 | 116 | // reads a word in big-endian byte order from RX_FRAME_PORT |
| frank26080115 | 0:bf7b9fba3924 | 117 | // (useful to avoid permanent byte-swapping while reading |
| frank26080115 | 0:bf7b9fba3924 | 118 | // TCP/IP-data) |
| frank26080115 | 0:bf7b9fba3924 | 119 | |
| frank26080115 | 0:bf7b9fba3924 | 120 | unsigned short ReadFrameBE_EMAC(void) |
| frank26080115 | 0:bf7b9fba3924 | 121 | { |
| frank26080115 | 0:bf7b9fba3924 | 122 | unsigned short ReturnValue; |
| frank26080115 | 0:bf7b9fba3924 | 123 | |
| frank26080115 | 0:bf7b9fba3924 | 124 | ReturnValue = SwapBytes (*rptr++); |
| frank26080115 | 0:bf7b9fba3924 | 125 | return (ReturnValue); |
| frank26080115 | 0:bf7b9fba3924 | 126 | } |
| frank26080115 | 0:bf7b9fba3924 | 127 | |
| frank26080115 | 0:bf7b9fba3924 | 128 | |
| frank26080115 | 0:bf7b9fba3924 | 129 | // copies bytes from frame port to MCU-memory |
| frank26080115 | 0:bf7b9fba3924 | 130 | // NOTES: * an odd number of byte may only be transfered |
| frank26080115 | 0:bf7b9fba3924 | 131 | // if the frame is read to the end! |
| frank26080115 | 0:bf7b9fba3924 | 132 | // * MCU-memory MUST start at word-boundary |
| frank26080115 | 0:bf7b9fba3924 | 133 | |
| frank26080115 | 0:bf7b9fba3924 | 134 | void CopyFromFrame_EMAC(void *Dest, unsigned short Size) |
| frank26080115 | 0:bf7b9fba3924 | 135 | { |
| frank26080115 | 0:bf7b9fba3924 | 136 | unsigned short * piDest; // Keil: Pointer added to correct expression |
| frank26080115 | 0:bf7b9fba3924 | 137 | |
| frank26080115 | 0:bf7b9fba3924 | 138 | piDest = Dest; // Keil: Line added |
| frank26080115 | 0:bf7b9fba3924 | 139 | while (Size > 1) { |
| frank26080115 | 0:bf7b9fba3924 | 140 | *piDest++ = ReadFrame_EMAC(); |
| frank26080115 | 0:bf7b9fba3924 | 141 | Size -= 2; |
| frank26080115 | 0:bf7b9fba3924 | 142 | } |
| frank26080115 | 0:bf7b9fba3924 | 143 | |
| frank26080115 | 0:bf7b9fba3924 | 144 | if (Size) { // check for leftover byte... |
| frank26080115 | 0:bf7b9fba3924 | 145 | *(unsigned char *)piDest = (char)ReadFrame_EMAC();// the LAN-Controller will return 0 |
| frank26080115 | 0:bf7b9fba3924 | 146 | } // for the highbyte |
| frank26080115 | 0:bf7b9fba3924 | 147 | } |
| frank26080115 | 0:bf7b9fba3924 | 148 | |
| frank26080115 | 0:bf7b9fba3924 | 149 | // does a dummy read on frame-I/O-port |
| frank26080115 | 0:bf7b9fba3924 | 150 | // NOTE: only an even number of bytes is read! |
| frank26080115 | 0:bf7b9fba3924 | 151 | |
| frank26080115 | 0:bf7b9fba3924 | 152 | void DummyReadFrame_EMAC(unsigned short Size) // discards an EVEN number of bytes |
| frank26080115 | 0:bf7b9fba3924 | 153 | { // from RX-fifo |
| frank26080115 | 0:bf7b9fba3924 | 154 | while (Size > 1) { |
| frank26080115 | 0:bf7b9fba3924 | 155 | ReadFrame_EMAC(); |
| frank26080115 | 0:bf7b9fba3924 | 156 | Size -= 2; |
| frank26080115 | 0:bf7b9fba3924 | 157 | } |
| frank26080115 | 0:bf7b9fba3924 | 158 | } |
| frank26080115 | 0:bf7b9fba3924 | 159 | |
| frank26080115 | 0:bf7b9fba3924 | 160 | // Reads the length of the received ethernet frame and checks if the |
| frank26080115 | 0:bf7b9fba3924 | 161 | // destination address is a broadcast message or not |
| frank26080115 | 0:bf7b9fba3924 | 162 | // returns the frame length |
| frank26080115 | 0:bf7b9fba3924 | 163 | unsigned short StartReadFrame(void) { |
| frank26080115 | 0:bf7b9fba3924 | 164 | unsigned short RxLen; |
| frank26080115 | 0:bf7b9fba3924 | 165 | EMAC_PACKETBUF_Type RxPack; |
| frank26080115 | 0:bf7b9fba3924 | 166 | |
| frank26080115 | 0:bf7b9fba3924 | 167 | RxLen = EMAC_GetReceiveDataSize() - 3; |
| frank26080115 | 0:bf7b9fba3924 | 168 | // Copy packet to data buffer |
| frank26080115 | 0:bf7b9fba3924 | 169 | RxPack.pbDataBuf = (uint32_t *)pgBuf; |
| frank26080115 | 0:bf7b9fba3924 | 170 | RxPack.ulDataLen = RxLen; |
| frank26080115 | 0:bf7b9fba3924 | 171 | EMAC_ReadPacketBuffer(&RxPack); |
| frank26080115 | 0:bf7b9fba3924 | 172 | // Point to the data buffer |
| frank26080115 | 0:bf7b9fba3924 | 173 | rptr = (unsigned short *)pgBuf; |
| frank26080115 | 0:bf7b9fba3924 | 174 | return(RxLen); |
| frank26080115 | 0:bf7b9fba3924 | 175 | } |
| frank26080115 | 0:bf7b9fba3924 | 176 | |
| frank26080115 | 0:bf7b9fba3924 | 177 | // Release the buffer after reading all the content inside |
| frank26080115 | 0:bf7b9fba3924 | 178 | void EndReadFrame(void) { |
| frank26080115 | 0:bf7b9fba3924 | 179 | // just call EMAC_UpdateConsumeIndex() in EMAC driver |
| frank26080115 | 0:bf7b9fba3924 | 180 | EMAC_UpdateRxConsumeIndex(); |
| frank26080115 | 0:bf7b9fba3924 | 181 | } |
| frank26080115 | 0:bf7b9fba3924 | 182 | |
| frank26080115 | 0:bf7b9fba3924 | 183 | // Check whether if there is a receive packet coming |
| frank26080115 | 0:bf7b9fba3924 | 184 | unsigned int CheckFrameReceived(void) { // Packet received ? |
| frank26080115 | 0:bf7b9fba3924 | 185 | // Just call EMAC_CheckReceiveIndex() in EMAC driver |
| frank26080115 | 0:bf7b9fba3924 | 186 | if (EMAC_CheckReceiveIndex() == TRUE){ |
| frank26080115 | 0:bf7b9fba3924 | 187 | return (1); |
| frank26080115 | 0:bf7b9fba3924 | 188 | } else { |
| frank26080115 | 0:bf7b9fba3924 | 189 | return (0); |
| frank26080115 | 0:bf7b9fba3924 | 190 | } |
| frank26080115 | 0:bf7b9fba3924 | 191 | } |
| frank26080115 | 0:bf7b9fba3924 | 192 | |
| frank26080115 | 0:bf7b9fba3924 | 193 | // requests space in EMAC memory for storing an outgoing frame |
| frank26080115 | 0:bf7b9fba3924 | 194 | void RequestSend(unsigned short FrameSize) |
| frank26080115 | 0:bf7b9fba3924 | 195 | { |
| frank26080115 | 0:bf7b9fba3924 | 196 | // Nothing to do here, just implemented in CopyToFrame_EMAC() |
| frank26080115 | 0:bf7b9fba3924 | 197 | } |
| frank26080115 | 0:bf7b9fba3924 | 198 | |
| frank26080115 | 0:bf7b9fba3924 | 199 | // check if ethernet controller is ready to accept the |
| frank26080115 | 0:bf7b9fba3924 | 200 | // frame we want to send |
| frank26080115 | 0:bf7b9fba3924 | 201 | |
| frank26080115 | 0:bf7b9fba3924 | 202 | unsigned int Rdy4Tx(void) |
| frank26080115 | 0:bf7b9fba3924 | 203 | { |
| frank26080115 | 0:bf7b9fba3924 | 204 | return (1); // the ethernet controller transmits much faster |
| frank26080115 | 0:bf7b9fba3924 | 205 | } // than the CPU can load its buffers |
| frank26080115 | 0:bf7b9fba3924 | 206 | |
| frank26080115 | 0:bf7b9fba3924 | 207 | |
| frank26080115 | 0:bf7b9fba3924 | 208 | // writes a word in little-endian byte order to TX_BUFFER |
| frank26080115 | 0:bf7b9fba3924 | 209 | void WriteFrame_EMAC(unsigned short Data) |
| frank26080115 | 0:bf7b9fba3924 | 210 | { |
| frank26080115 | 0:bf7b9fba3924 | 211 | *tptr++ = Data; |
| frank26080115 | 0:bf7b9fba3924 | 212 | } |
| frank26080115 | 0:bf7b9fba3924 | 213 | |
| frank26080115 | 0:bf7b9fba3924 | 214 | // copies bytes from MCU-memory to frame port |
| frank26080115 | 0:bf7b9fba3924 | 215 | // NOTES: * an odd number of byte may only be transfered |
| frank26080115 | 0:bf7b9fba3924 | 216 | // if the frame is written to the end! |
| frank26080115 | 0:bf7b9fba3924 | 217 | // * MCU-memory MUST start at word-boundary |
| frank26080115 | 0:bf7b9fba3924 | 218 | |
| frank26080115 | 0:bf7b9fba3924 | 219 | void CopyToFrame_EMAC(void *Source, unsigned int Size) |
| frank26080115 | 0:bf7b9fba3924 | 220 | { |
| frank26080115 | 0:bf7b9fba3924 | 221 | EMAC_PACKETBUF_Type TxPack; |
| frank26080115 | 0:bf7b9fba3924 | 222 | |
| frank26080115 | 0:bf7b9fba3924 | 223 | // Setup Tx Packet buffer |
| frank26080115 | 0:bf7b9fba3924 | 224 | // NXP: Added for compatibility with old style |
| frank26080115 | 0:bf7b9fba3924 | 225 | TxPack.ulDataLen = Size; |
| frank26080115 | 0:bf7b9fba3924 | 226 | TxPack.pbDataBuf = (uint32_t *)Source; |
| frank26080115 | 0:bf7b9fba3924 | 227 | EMAC_WritePacketBuffer(&TxPack); |
| frank26080115 | 0:bf7b9fba3924 | 228 | EMAC_UpdateTxProduceIndex(); |
| frank26080115 | 0:bf7b9fba3924 | 229 | } |
| frank26080115 | 0:bf7b9fba3924 | 230 |