Donatien Garnier
ZG2100 Network interface source
drv/zg2100/zg_com.c@0:b802fc31f1db, 2010-07-09 (annotated)
- Committer:
- donatien
- Date:
- Fri Jul 09 15:37:23 2010 +0000
- Revision:
- 0:b802fc31f1db
- Child:
- 1:3a7c15057192
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| donatien | 0:b802fc31f1db | 1 | |
| donatien | 0:b802fc31f1db | 2 | /* |
| donatien | 0:b802fc31f1db | 3 | Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com) |
| donatien | 0:b802fc31f1db | 4 | |
| donatien | 0:b802fc31f1db | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy |
| donatien | 0:b802fc31f1db | 6 | of this software and associated documentation files (the "Software"), to deal |
| donatien | 0:b802fc31f1db | 7 | in the Software without restriction, including without limitation the rights |
| donatien | 0:b802fc31f1db | 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| donatien | 0:b802fc31f1db | 9 | copies of the Software, and to permit persons to whom the Software is |
| donatien | 0:b802fc31f1db | 10 | furnished to do so, subject to the following conditions: |
| donatien | 0:b802fc31f1db | 11 | |
| donatien | 0:b802fc31f1db | 12 | The above copyright notice and this permission notice shall be included in |
| donatien | 0:b802fc31f1db | 13 | all copies or substantial portions of the Software. |
| donatien | 0:b802fc31f1db | 14 | |
| donatien | 0:b802fc31f1db | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| donatien | 0:b802fc31f1db | 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| donatien | 0:b802fc31f1db | 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| donatien | 0:b802fc31f1db | 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| donatien | 0:b802fc31f1db | 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| donatien | 0:b802fc31f1db | 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| donatien | 0:b802fc31f1db | 21 | THE SOFTWARE. |
| donatien | 0:b802fc31f1db | 22 | */ |
| donatien | 0:b802fc31f1db | 23 | |
| donatien | 0:b802fc31f1db | 24 | #include "netCfg.h" |
| donatien | 0:b802fc31f1db | 25 | #if NET_ZG2100 |
| donatien | 0:b802fc31f1db | 26 | |
| donatien | 0:b802fc31f1db | 27 | #include "zg_defs.h" |
| donatien | 0:b802fc31f1db | 28 | #include "zg_com.h" |
| donatien | 0:b802fc31f1db | 29 | |
| donatien | 0:b802fc31f1db | 30 | #include "mbed.h" //For SPI, DigitalOut & InterruptIn |
| donatien | 0:b802fc31f1db | 31 | |
| donatien | 0:b802fc31f1db | 32 | //#define __DEBUG |
| donatien | 0:b802fc31f1db | 33 | #include "dbg/dbg.h" |
| donatien | 0:b802fc31f1db | 34 | |
| donatien | 0:b802fc31f1db | 35 | #define ZG_CMD_BUF_SIZE 16 |
| donatien | 0:b802fc31f1db | 36 | |
| donatien | 0:b802fc31f1db | 37 | //Locals |
| donatien | 0:b802fc31f1db | 38 | static SPI* m_pSpi; |
| donatien | 0:b802fc31f1db | 39 | static DigitalOut* m_pCs; |
| donatien | 0:b802fc31f1db | 40 | static InterruptIn* m_pInt; |
| donatien | 0:b802fc31f1db | 41 | |
| donatien | 0:b802fc31f1db | 42 | static byte cmd[ZG_CMD_BUF_SIZE] ZG_MEM; |
| donatien | 0:b802fc31f1db | 43 | |
| donatien | 0:b802fc31f1db | 44 | //Functions |
| donatien | 0:b802fc31f1db | 45 | |
| donatien | 0:b802fc31f1db | 46 | void zg_com_init(SPI* pSpi, DigitalOut* pCs, InterruptIn* pInt, DigitalOut* pNrst) |
| donatien | 0:b802fc31f1db | 47 | { |
| donatien | 0:b802fc31f1db | 48 | m_pSpi = pSpi; |
| donatien | 0:b802fc31f1db | 49 | m_pCs = pCs; |
| donatien | 0:b802fc31f1db | 50 | m_pInt = pInt; |
| donatien | 0:b802fc31f1db | 51 | m_pCs->write(ZG_SPI_CS_OFF); //Do no select chip for now |
| donatien | 0:b802fc31f1db | 52 | m_pSpi->format(8,0); //8 bits / word, Mode 0 |
| donatien | 0:b802fc31f1db | 53 | //m_pSpi->frequency(1000000); //1Mhz - FMax is 25MHz |
| donatien | 0:b802fc31f1db | 54 | m_pSpi->frequency(20000000); //20Mhz - FMax is 25MHz |
| donatien | 0:b802fc31f1db | 55 | //Reset chip |
| donatien | 0:b802fc31f1db | 56 | pNrst->write(ZG_SPI_RST_ON); |
| donatien | 0:b802fc31f1db | 57 | wait_ms(100); |
| donatien | 0:b802fc31f1db | 58 | //And release |
| donatien | 0:b802fc31f1db | 59 | pNrst->write(ZG_SPI_RST_OFF); |
| donatien | 0:b802fc31f1db | 60 | m_pInt->fall(zg_on_int); //Attach on interrupt callback |
| donatien | 0:b802fc31f1db | 61 | } |
| donatien | 0:b802fc31f1db | 62 | |
| donatien | 0:b802fc31f1db | 63 | |
| donatien | 0:b802fc31f1db | 64 | //Registers Access |
| donatien | 0:b802fc31f1db | 65 | |
| donatien | 0:b802fc31f1db | 66 | uint32_t zg_register_read(uint32_t addr) |
| donatien | 0:b802fc31f1db | 67 | { |
| donatien | 0:b802fc31f1db | 68 | int len; |
| donatien | 0:b802fc31f1db | 69 | uint32_t res; |
| donatien | 0:b802fc31f1db | 70 | |
| donatien | 0:b802fc31f1db | 71 | len = ZG_REG_LEN( addr ); |
| donatien | 0:b802fc31f1db | 72 | cmd[0] = (byte)(ZG_CMD_REG_RD | addr); |
| donatien | 0:b802fc31f1db | 73 | memset( &cmd[1], 0, len ); |
| donatien | 0:b802fc31f1db | 74 | |
| donatien | 0:b802fc31f1db | 75 | zg_spi_trf(cmd, len + 1); |
| donatien | 0:b802fc31f1db | 76 | |
| donatien | 0:b802fc31f1db | 77 | if(len==1) |
| donatien | 0:b802fc31f1db | 78 | { |
| donatien | 0:b802fc31f1db | 79 | res = cmd[1]; |
| donatien | 0:b802fc31f1db | 80 | } |
| donatien | 0:b802fc31f1db | 81 | else //if(len == 2) |
| donatien | 0:b802fc31f1db | 82 | { |
| donatien | 0:b802fc31f1db | 83 | res = (uint16_t) DTOHS( *((uint16_t*)&cmd[1]) ); |
| donatien | 0:b802fc31f1db | 84 | } |
| donatien | 0:b802fc31f1db | 85 | |
| donatien | 0:b802fc31f1db | 86 | return res; |
| donatien | 0:b802fc31f1db | 87 | } |
| donatien | 0:b802fc31f1db | 88 | |
| donatien | 0:b802fc31f1db | 89 | void zg_register_write(uint32_t addr, uint32_t reg) |
| donatien | 0:b802fc31f1db | 90 | { |
| donatien | 0:b802fc31f1db | 91 | int len; |
| donatien | 0:b802fc31f1db | 92 | |
| donatien | 0:b802fc31f1db | 93 | len = ZG_REG_LEN( addr ); |
| donatien | 0:b802fc31f1db | 94 | cmd[0] = (byte)(ZG_CMD_REG_WR | addr); |
| donatien | 0:b802fc31f1db | 95 | |
| donatien | 0:b802fc31f1db | 96 | if(len==1) |
| donatien | 0:b802fc31f1db | 97 | { |
| donatien | 0:b802fc31f1db | 98 | cmd[1] = reg; |
| donatien | 0:b802fc31f1db | 99 | } |
| donatien | 0:b802fc31f1db | 100 | else //if(len == 2) |
| donatien | 0:b802fc31f1db | 101 | { |
| donatien | 0:b802fc31f1db | 102 | *((uint16_t*)&cmd[1]) = HTODS( reg ); |
| donatien | 0:b802fc31f1db | 103 | } |
| donatien | 0:b802fc31f1db | 104 | |
| donatien | 0:b802fc31f1db | 105 | zg_spi_trf(cmd, len + 1); |
| donatien | 0:b802fc31f1db | 106 | } |
| donatien | 0:b802fc31f1db | 107 | |
| donatien | 0:b802fc31f1db | 108 | //Indexed Registers Access |
| donatien | 0:b802fc31f1db | 109 | |
| donatien | 0:b802fc31f1db | 110 | uint32_t zg_indexed_register_read(uint32_t addr) |
| donatien | 0:b802fc31f1db | 111 | { |
| donatien | 0:b802fc31f1db | 112 | zg_register_write( ZG_REG_IREG_ADDR, addr ); |
| donatien | 0:b802fc31f1db | 113 | return zg_register_read( ZG_REG_IREG_DATA ); |
| donatien | 0:b802fc31f1db | 114 | } |
| donatien | 0:b802fc31f1db | 115 | |
| donatien | 0:b802fc31f1db | 116 | void zg_indexed_register_write(uint32_t addr, uint32_t reg) |
| donatien | 0:b802fc31f1db | 117 | { |
| donatien | 0:b802fc31f1db | 118 | zg_register_write( ZG_REG_IREG_ADDR, addr ); |
| donatien | 0:b802fc31f1db | 119 | zg_register_write( ZG_REG_IREG_DATA, reg ); |
| donatien | 0:b802fc31f1db | 120 | } |
| donatien | 0:b802fc31f1db | 121 | |
| donatien | 0:b802fc31f1db | 122 | //Fifos |
| donatien | 0:b802fc31f1db | 123 | |
| donatien | 0:b802fc31f1db | 124 | void zg_fifo_read( byte fifo, byte* pType, byte* pSubtype, byte* buf, int len ) |
| donatien | 0:b802fc31f1db | 125 | { |
| donatien | 0:b802fc31f1db | 126 | cmd[0] = (fifo==ZG_FIFO_DATA)?ZG_CMD_FIFO_RD_DATA:ZG_CMD_FIFO_RD_MGMT; |
| donatien | 0:b802fc31f1db | 127 | memset( &cmd[1], 0, 2 ); |
| donatien | 0:b802fc31f1db | 128 | zg_spi_trf(cmd, 3, false); //false : Command not terminated yet |
| donatien | 0:b802fc31f1db | 129 | *pType = cmd[1]; |
| donatien | 0:b802fc31f1db | 130 | *pSubtype = cmd[2]; |
| donatien | 0:b802fc31f1db | 131 | |
| donatien | 0:b802fc31f1db | 132 | memset(buf, 0, len); |
| donatien | 0:b802fc31f1db | 133 | zg_spi_trf(buf, len); |
| donatien | 0:b802fc31f1db | 134 | |
| donatien | 0:b802fc31f1db | 135 | cmd[0] = ZG_CMD_FIFO_RD_DONE; |
| donatien | 0:b802fc31f1db | 136 | zg_spi_trf(cmd, 1); |
| donatien | 0:b802fc31f1db | 137 | } |
| donatien | 0:b802fc31f1db | 138 | |
| donatien | 0:b802fc31f1db | 139 | void zg_fifo_write( byte fifo, byte type, byte subtype, byte* buf, int len, bool start /*= true*/, bool stop /*= true*/ ) |
| donatien | 0:b802fc31f1db | 140 | { |
| donatien | 0:b802fc31f1db | 141 | if(start) |
| donatien | 0:b802fc31f1db | 142 | { |
| donatien | 0:b802fc31f1db | 143 | cmd[0] = (fifo==ZG_FIFO_DATA)?ZG_CMD_FIFO_WR_DATA:ZG_CMD_FIFO_WR_MGMT; |
| donatien | 0:b802fc31f1db | 144 | cmd[1] = type; |
| donatien | 0:b802fc31f1db | 145 | cmd[2] = subtype; |
| donatien | 0:b802fc31f1db | 146 | zg_spi_trf(cmd, 3, false); //false : Command not terminated yet |
| donatien | 0:b802fc31f1db | 147 | } |
| donatien | 0:b802fc31f1db | 148 | |
| donatien | 0:b802fc31f1db | 149 | /*if(len>0 && buf!=NULL) |
| donatien | 0:b802fc31f1db | 150 | {*/ |
| donatien | 0:b802fc31f1db | 151 | zg_spi_trf(buf, len, stop); |
| donatien | 0:b802fc31f1db | 152 | /*}*/ |
| donatien | 0:b802fc31f1db | 153 | |
| donatien | 0:b802fc31f1db | 154 | if(stop) |
| donatien | 0:b802fc31f1db | 155 | { |
| donatien | 0:b802fc31f1db | 156 | cmd[0] = ZG_CMD_FIFO_WR_DONE; |
| donatien | 0:b802fc31f1db | 157 | zg_spi_trf(cmd, 1); |
| donatien | 0:b802fc31f1db | 158 | } |
| donatien | 0:b802fc31f1db | 159 | } |
| donatien | 0:b802fc31f1db | 160 | |
| donatien | 0:b802fc31f1db | 161 | |
| donatien | 0:b802fc31f1db | 162 | void zg_spi_trf(byte* buf, int len, bool resetCs /*= true*/) |
| donatien | 0:b802fc31f1db | 163 | { |
| donatien | 0:b802fc31f1db | 164 | int i; |
| donatien | 0:b802fc31f1db | 165 | m_pCs->write(ZG_SPI_CS_ON); |
| donatien | 0:b802fc31f1db | 166 | |
| donatien | 0:b802fc31f1db | 167 | /* |
| donatien | 0:b802fc31f1db | 168 | DBG("\r\nDump: >>\r\n"); |
| donatien | 0:b802fc31f1db | 169 | for(i=0; i<len; i++) |
| donatien | 0:b802fc31f1db | 170 | { |
| donatien | 0:b802fc31f1db | 171 | DBG("%02x ", buf[i]); |
| donatien | 0:b802fc31f1db | 172 | } |
| donatien | 0:b802fc31f1db | 173 | DBG("\r\n>>\r\n"); |
| donatien | 0:b802fc31f1db | 174 | */ |
| donatien | 0:b802fc31f1db | 175 | |
| donatien | 0:b802fc31f1db | 176 | for(i=0; i<len; i++) |
| donatien | 0:b802fc31f1db | 177 | { |
| donatien | 0:b802fc31f1db | 178 | buf[i] = (byte) m_pSpi->write(buf[i]); |
| donatien | 0:b802fc31f1db | 179 | } |
| donatien | 0:b802fc31f1db | 180 | |
| donatien | 0:b802fc31f1db | 181 | /* |
| donatien | 0:b802fc31f1db | 182 | DBG("\r\nDump: <<\r\n"); |
| donatien | 0:b802fc31f1db | 183 | for(i=0; i<len; i++) |
| donatien | 0:b802fc31f1db | 184 | { |
| donatien | 0:b802fc31f1db | 185 | DBG("%02x ", buf[i]); |
| donatien | 0:b802fc31f1db | 186 | } |
| donatien | 0:b802fc31f1db | 187 | DBG("\r\n<<\r\n"); |
| donatien | 0:b802fc31f1db | 188 | */ |
| donatien | 0:b802fc31f1db | 189 | |
| donatien | 0:b802fc31f1db | 190 | if(resetCs) //If false, allows to split transfer in multiple calls |
| donatien | 0:b802fc31f1db | 191 | m_pCs->write(ZG_SPI_CS_OFF); |
| donatien | 0:b802fc31f1db | 192 | } |
| donatien | 0:b802fc31f1db | 193 | |
| donatien | 0:b802fc31f1db | 194 | #endif |