one wire driver
Dependents: 09_PT1000 10_PT1000 11_PT1000
DS2482.cpp@1:0950824b1ca3, 2013-05-04 (annotated)
- Committer:
- rs27
- Date:
- Sat May 04 10:11:42 2013 +0000
- Revision:
- 1:0950824b1ca3
- Parent:
- 0:c57706d25cf0
- Child:
- 2:e9048135901b
test
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
rs27 | 0:c57706d25cf0 | 1 | |
rs27 | 0:c57706d25cf0 | 2 | |
rs27 | 0:c57706d25cf0 | 3 | #include "mbed.h" |
rs27 | 0:c57706d25cf0 | 4 | #include "DS2482.h" |
rs27 | 0:c57706d25cf0 | 5 | |
rs27 | 1:0950824b1ca3 | 6 | extern Serial pc; |
rs27 | 1:0950824b1ca3 | 7 | |
rs27 | 0:c57706d25cf0 | 8 | //----------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 9 | // CRC = X^8 + X^5 + X^4 + 1 |
rs27 | 0:c57706d25cf0 | 10 | |
rs27 | 0:c57706d25cf0 | 11 | #define CRC_TABLE_ITEMS 256 |
rs27 | 0:c57706d25cf0 | 12 | |
rs27 | 0:c57706d25cf0 | 13 | const uint8_t crc_table[CRC_TABLE_ITEMS] = |
rs27 | 0:c57706d25cf0 | 14 | { |
rs27 | 0:c57706d25cf0 | 15 | 0 , 94,188,226, 97, 63,221,131,194,156,126, 32,163,253, 31, 65, |
rs27 | 0:c57706d25cf0 | 16 | 157,195, 33,127,252,162, 64, 30, 95, 1,227,189, 62, 96,130,220, |
rs27 | 0:c57706d25cf0 | 17 | 35 ,125,159,193, 66, 28,254,160,225,191, 93, 3,128,222, 60, 98, |
rs27 | 0:c57706d25cf0 | 18 | 190,224, 2, 92,223,129, 99, 61,124, 34,192,158, 29, 67,161,255, |
rs27 | 0:c57706d25cf0 | 19 | 70, 24,250,164, 39,121,155,197,132,218, 56,102,229,187, 89, 7, |
rs27 | 0:c57706d25cf0 | 20 | 219,133,103, 57,186,228, 6, 88, 25, 71,165,251,120, 38,196,154, |
rs27 | 0:c57706d25cf0 | 21 | 101, 59,217,135, 4, 90,184,230,167,249, 27, 69,198,152,122, 36, |
rs27 | 0:c57706d25cf0 | 22 | 248,166, 68, 26,153,199, 37,123, 58,100,134,216, 91, 5,231,185, |
rs27 | 0:c57706d25cf0 | 23 | 140,210, 48,110,237,179, 81, 15, 78, 16,242,172, 47,113,147,205, |
rs27 | 0:c57706d25cf0 | 24 | 17, 79,173,243,112, 46,204,146,211,141,111, 49,178,236, 14, 80, |
rs27 | 0:c57706d25cf0 | 25 | 175,241, 19, 77,206,144,114, 44,109, 51,209,143, 12, 82,176,238, |
rs27 | 0:c57706d25cf0 | 26 | 50,108,142,208, 83, 13,239,177,240,174, 76, 18,145,207, 45,115, |
rs27 | 0:c57706d25cf0 | 27 | 202,148,118, 40,171,245, 23, 73, 8, 86,180,234,105, 55,213,139, |
rs27 | 0:c57706d25cf0 | 28 | 87, 9,235,181, 54,104,138,212,149,203, 41,119,244,170, 72, 22, |
rs27 | 0:c57706d25cf0 | 29 | 233,183, 85, 11,136,214, 52,106, 43,117,151,201, 74, 20,246,168, |
rs27 | 0:c57706d25cf0 | 30 | 116, 42,200,150, 21, 75,169,247,182,232, 10, 84,215,137,107, 53 |
rs27 | 0:c57706d25cf0 | 31 | }; |
rs27 | 0:c57706d25cf0 | 32 | |
rs27 | 0:c57706d25cf0 | 33 | |
rs27 | 0:c57706d25cf0 | 34 | //========================================================================== |
rs27 | 0:c57706d25cf0 | 35 | // destructor |
rs27 | 0:c57706d25cf0 | 36 | |
rs27 | 0:c57706d25cf0 | 37 | DS2482::DS2482(PinName sda, PinName scl, int address) : i2c(sda, scl) |
rs27 | 0:c57706d25cf0 | 38 | { |
rs27 | 0:c57706d25cf0 | 39 | addr = address; |
rs27 | 0:c57706d25cf0 | 40 | i2c.frequency(100000); |
rs27 | 0:c57706d25cf0 | 41 | } |
rs27 | 0:c57706d25cf0 | 42 | |
rs27 | 0:c57706d25cf0 | 43 | //----------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 44 | // Calculate the CRC8 of the byte value provided with the current |
rs27 | 0:c57706d25cf0 | 45 | // global 'crc8' value. |
rs27 | 0:c57706d25cf0 | 46 | // Returns current global crc8 value |
rs27 | 0:c57706d25cf0 | 47 | // |
rs27 | 0:c57706d25cf0 | 48 | uint8_t DS2482::crc_calc(uint8_t x) |
rs27 | 0:c57706d25cf0 | 49 | { |
rs27 | 0:c57706d25cf0 | 50 | crc_value = crc_table[crc_value ^ x]; |
rs27 | 0:c57706d25cf0 | 51 | return crc_value; |
rs27 | 0:c57706d25cf0 | 52 | } |
rs27 | 0:c57706d25cf0 | 53 | |
rs27 | 1:0950824b1ca3 | 54 | uint8_t DS2482::crc_calc_buffer(uint8_t *pbuffer, uint8_t count) |
rs27 | 1:0950824b1ca3 | 55 | { |
rs27 | 1:0950824b1ca3 | 56 | uint8_t n; |
rs27 | 1:0950824b1ca3 | 57 | |
rs27 | 1:0950824b1ca3 | 58 | crc_value = 0; |
rs27 | 1:0950824b1ca3 | 59 | |
rs27 | 1:0950824b1ca3 | 60 | for (n = 0; n < count; n++) |
rs27 | 1:0950824b1ca3 | 61 | { |
rs27 | 1:0950824b1ca3 | 62 | crc_value = crc_table[crc_value ^ *pbuffer++]; |
rs27 | 1:0950824b1ca3 | 63 | } |
rs27 | 1:0950824b1ca3 | 64 | |
rs27 | 1:0950824b1ca3 | 65 | return crc_value; |
rs27 | 1:0950824b1ca3 | 66 | } |
rs27 | 1:0950824b1ca3 | 67 | |
rs27 | 0:c57706d25cf0 | 68 | //========================================================================== |
rs27 | 0:c57706d25cf0 | 69 | // I2C DS2482 |
rs27 | 0:c57706d25cf0 | 70 | // |
rs27 | 0:c57706d25cf0 | 71 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 72 | // DS2482 Detect routine that sets the I2C address and then performs a |
rs27 | 0:c57706d25cf0 | 73 | // device reset followed by writing the configuration byte to default values: |
rs27 | 0:c57706d25cf0 | 74 | // 1-Wire speed (c1WS) = standard (0) |
rs27 | 0:c57706d25cf0 | 75 | // Strong pullup (cSPU) = off (0) |
rs27 | 0:c57706d25cf0 | 76 | // Presence pulse masking (cPPM) = off (0) |
rs27 | 0:c57706d25cf0 | 77 | // Active pullup (cAPU) = on (CONFIG_APU = 0x01) |
rs27 | 0:c57706d25cf0 | 78 | // |
rs27 | 0:c57706d25cf0 | 79 | // Returns: TRUE if device was detected and written |
rs27 | 0:c57706d25cf0 | 80 | // FALSE device not detected or failure to write configuration byte |
rs27 | 0:c57706d25cf0 | 81 | //uint8_t DS2482_detect(unsigned char addr) |
rs27 | 0:c57706d25cf0 | 82 | // |
rs27 | 0:c57706d25cf0 | 83 | uint8_t DS2482::detect(void) |
rs27 | 0:c57706d25cf0 | 84 | { |
rs27 | 0:c57706d25cf0 | 85 | |
rs27 | 0:c57706d25cf0 | 86 | if (!reset()) // reset the DS2482 ON selected address |
rs27 | 0:c57706d25cf0 | 87 | { |
rs27 | 0:c57706d25cf0 | 88 | #if OW_MASTER_START |
rs27 | 1:0950824b1ca3 | 89 | pc.printf("\r\n--- DS2482 bus0 reset not executed \n"); |
rs27 | 1:0950824b1ca3 | 90 | wait(0.1); |
rs27 | 0:c57706d25cf0 | 91 | #endif |
rs27 | 0:c57706d25cf0 | 92 | |
rs27 | 0:c57706d25cf0 | 93 | return false; |
rs27 | 0:c57706d25cf0 | 94 | } |
rs27 | 0:c57706d25cf0 | 95 | |
rs27 | 0:c57706d25cf0 | 96 | // default configuration |
rs27 | 0:c57706d25cf0 | 97 | c1WS = 0; |
rs27 | 0:c57706d25cf0 | 98 | cSPU = 0; |
rs27 | 0:c57706d25cf0 | 99 | cPPM = 0; |
rs27 | 0:c57706d25cf0 | 100 | cAPU = DS2482_CFG_APU; |
rs27 | 0:c57706d25cf0 | 101 | |
rs27 | 0:c57706d25cf0 | 102 | // write the default configuration setup |
rs27 | 0:c57706d25cf0 | 103 | if (!write_config(c1WS | cSPU | cPPM | cAPU)) |
rs27 | 0:c57706d25cf0 | 104 | { |
rs27 | 0:c57706d25cf0 | 105 | #if OW_MASTER_START |
rs27 | 1:0950824b1ca3 | 106 | pc.printf("\r\n--- DS2482 configuration failure \n"); |
rs27 | 1:0950824b1ca3 | 107 | wait(0.1); |
rs27 | 0:c57706d25cf0 | 108 | #endif |
rs27 | 0:c57706d25cf0 | 109 | |
rs27 | 0:c57706d25cf0 | 110 | return false; |
rs27 | 0:c57706d25cf0 | 111 | } |
rs27 | 0:c57706d25cf0 | 112 | |
rs27 | 0:c57706d25cf0 | 113 | #if OW_MASTER_START |
rs27 | 1:0950824b1ca3 | 114 | pc.printf("\r\n*** DS2482 detect OK \n"); |
rs27 | 1:0950824b1ca3 | 115 | wait(0.1); |
rs27 | 0:c57706d25cf0 | 116 | #endif |
rs27 | 0:c57706d25cf0 | 117 | |
rs27 | 0:c57706d25cf0 | 118 | return true; |
rs27 | 0:c57706d25cf0 | 119 | } |
rs27 | 0:c57706d25cf0 | 120 | |
rs27 | 0:c57706d25cf0 | 121 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 122 | // Perform a device reset on the DS2482 |
rs27 | 0:c57706d25cf0 | 123 | // |
rs27 | 0:c57706d25cf0 | 124 | // Returns: TRUE if device was reset |
rs27 | 0:c57706d25cf0 | 125 | // FALSE device not detected or failure to perform reset |
rs27 | 0:c57706d25cf0 | 126 | // |
rs27 | 0:c57706d25cf0 | 127 | int DS2482::reset(void) |
rs27 | 0:c57706d25cf0 | 128 | { |
rs27 | 0:c57706d25cf0 | 129 | char cmd[2]; |
rs27 | 0:c57706d25cf0 | 130 | |
rs27 | 0:c57706d25cf0 | 131 | cmd[0] = DS2482_CMD_DRST; |
rs27 | 1:0950824b1ca3 | 132 | // pc.printf("\nreset write"); |
rs27 | 0:c57706d25cf0 | 133 | i2c.write(addr, cmd, 1); |
rs27 | 1:0950824b1ca3 | 134 | // pc.printf("\nreset read"); |
rs27 | 0:c57706d25cf0 | 135 | i2c.read(addr, cmd, 1); |
rs27 | 1:0950824b1ca3 | 136 | // pc.printf(" cmd = %02x \n",cmd[0]); |
rs27 | 1:0950824b1ca3 | 137 | wait(0.1); |
rs27 | 0:c57706d25cf0 | 138 | return ((cmd[0] & 0xF7) == 0x10); |
rs27 | 0:c57706d25cf0 | 139 | } |
rs27 | 0:c57706d25cf0 | 140 | |
rs27 | 0:c57706d25cf0 | 141 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 142 | // Write the configuration register in the DS2482. The configuration |
rs27 | 0:c57706d25cf0 | 143 | // options are provided in the lower nibble of the provided config byte. |
rs27 | 0:c57706d25cf0 | 144 | // The uppper nibble in bitwise inverted when written to the DS2482. |
rs27 | 0:c57706d25cf0 | 145 | // |
rs27 | 0:c57706d25cf0 | 146 | // Returns: TRUE: config written and response correct |
rs27 | 0:c57706d25cf0 | 147 | // FALSE: response incorrect |
rs27 | 0:c57706d25cf0 | 148 | // |
rs27 | 0:c57706d25cf0 | 149 | uint8_t DS2482::write_config(uint8_t config) |
rs27 | 0:c57706d25cf0 | 150 | { |
rs27 | 0:c57706d25cf0 | 151 | char cmd[2]; |
rs27 | 0:c57706d25cf0 | 152 | char read_config; |
rs27 | 0:c57706d25cf0 | 153 | |
rs27 | 0:c57706d25cf0 | 154 | cmd[0] = DS2482_CMD_WCFG; |
rs27 | 0:c57706d25cf0 | 155 | cmd[1] = config | (~config << 4); |
rs27 | 0:c57706d25cf0 | 156 | i2c.write(addr, cmd, 2); |
rs27 | 0:c57706d25cf0 | 157 | |
rs27 | 0:c57706d25cf0 | 158 | i2c.read(addr, cmd, 1); |
rs27 | 0:c57706d25cf0 | 159 | read_config = cmd[0]; |
rs27 | 0:c57706d25cf0 | 160 | |
rs27 | 0:c57706d25cf0 | 161 | if (config != read_config) // check for failure due to incorrect read back |
rs27 | 0:c57706d25cf0 | 162 | { |
rs27 | 0:c57706d25cf0 | 163 | // handle error |
rs27 | 0:c57706d25cf0 | 164 | // ... |
rs27 | 0:c57706d25cf0 | 165 | #if OW_MASTER_START |
rs27 | 1:0950824b1ca3 | 166 | pc.printf("\r\n---check for failure due to incorrect config read back"); |
rs27 | 0:c57706d25cf0 | 167 | #endif |
rs27 | 0:c57706d25cf0 | 168 | |
rs27 | 0:c57706d25cf0 | 169 | reset(); |
rs27 | 0:c57706d25cf0 | 170 | return false; |
rs27 | 0:c57706d25cf0 | 171 | } |
rs27 | 0:c57706d25cf0 | 172 | return true; |
rs27 | 0:c57706d25cf0 | 173 | |
rs27 | 0:c57706d25cf0 | 174 | } |
rs27 | 0:c57706d25cf0 | 175 | |
rs27 | 0:c57706d25cf0 | 176 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 177 | // DS2482 1-Wire Operations |
rs27 | 0:c57706d25cf0 | 178 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 179 | // |
rs27 | 0:c57706d25cf0 | 180 | //OWReset |
rs27 | 0:c57706d25cf0 | 181 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 182 | // Reset all of the devices on the 1-Wire Net and return the result. |
rs27 | 0:c57706d25cf0 | 183 | // |
rs27 | 0:c57706d25cf0 | 184 | // Returns: TRUE(1): presence pulse(s) detected, device(s) reset |
rs27 | 0:c57706d25cf0 | 185 | // FALSE(0): no presence pulses detected |
rs27 | 0:c57706d25cf0 | 186 | // |
rs27 | 0:c57706d25cf0 | 187 | uint8_t DS2482::OWReset(void) |
rs27 | 0:c57706d25cf0 | 188 | { |
rs27 | 0:c57706d25cf0 | 189 | uint8_t poll_count = 0; |
rs27 | 1:0950824b1ca3 | 190 | char cmd[2]; |
rs27 | 0:c57706d25cf0 | 191 | |
rs27 | 0:c57706d25cf0 | 192 | cmd[0] = DS2482_CMD_1WRS; |
rs27 | 0:c57706d25cf0 | 193 | i2c.write(addr,cmd,1); |
rs27 | 0:c57706d25cf0 | 194 | |
rs27 | 0:c57706d25cf0 | 195 | #if OW_MASTER_DEBUG |
rs27 | 1:0950824b1ca3 | 196 | pc.printf("\r\n*** Reset all devices on the 1-Wire Net\r\n"); |
rs27 | 0:c57706d25cf0 | 197 | #endif |
rs27 | 1:0950824b1ca3 | 198 | |
rs27 | 0:c57706d25cf0 | 199 | do |
rs27 | 0:c57706d25cf0 | 200 | { |
rs27 | 1:0950824b1ca3 | 201 | i2c.read(addr,cmd,1); |
rs27 | 1:0950824b1ca3 | 202 | // pc.printf("\n read %04x",cmd[0]); |
rs27 | 0:c57706d25cf0 | 203 | } |
rs27 | 0:c57706d25cf0 | 204 | while ((cmd[0] & DS2482_STATUS_1WB) && (poll_count++ < POLL_LIMIT)); |
rs27 | 1:0950824b1ca3 | 205 | |
rs27 | 0:c57706d25cf0 | 206 | // check for failure due to poll limit reached |
rs27 | 0:c57706d25cf0 | 207 | if (poll_count >= POLL_LIMIT) |
rs27 | 0:c57706d25cf0 | 208 | { |
rs27 | 0:c57706d25cf0 | 209 | // handle error |
rs27 | 0:c57706d25cf0 | 210 | // ... |
rs27 | 0:c57706d25cf0 | 211 | #if OW_MASTER_DEBUG |
rs27 | 1:0950824b1ca3 | 212 | pc.printf("\r\n---poll limit reached"); |
rs27 | 0:c57706d25cf0 | 213 | #endif |
rs27 | 0:c57706d25cf0 | 214 | |
rs27 | 0:c57706d25cf0 | 215 | reset(); |
rs27 | 1:0950824b1ca3 | 216 | return false; |
rs27 | 0:c57706d25cf0 | 217 | } |
rs27 | 0:c57706d25cf0 | 218 | |
rs27 | 0:c57706d25cf0 | 219 | // check for short condition |
rs27 | 0:c57706d25cf0 | 220 | if (cmd[0] & DS2482_STATUS_SD) |
rs27 | 0:c57706d25cf0 | 221 | { |
rs27 | 0:c57706d25cf0 | 222 | #if OW_MASTER_DEBUG |
rs27 | 1:0950824b1ca3 | 223 | pc.printf("\r\n---1-Wire Net short detected %04x",cmd[0]); |
rs27 | 0:c57706d25cf0 | 224 | #endif |
rs27 | 0:c57706d25cf0 | 225 | |
rs27 | 0:c57706d25cf0 | 226 | short_detected = true; |
rs27 | 0:c57706d25cf0 | 227 | } |
rs27 | 0:c57706d25cf0 | 228 | else |
rs27 | 0:c57706d25cf0 | 229 | { |
rs27 | 0:c57706d25cf0 | 230 | #if OW_MASTER_DEBUG |
rs27 | 1:0950824b1ca3 | 231 | pc.printf("\r\n*** 1-Wire electrical net is OK"); |
rs27 | 0:c57706d25cf0 | 232 | #endif |
rs27 | 0:c57706d25cf0 | 233 | |
rs27 | 0:c57706d25cf0 | 234 | short_detected = false; |
rs27 | 0:c57706d25cf0 | 235 | } |
rs27 | 1:0950824b1ca3 | 236 | |
rs27 | 0:c57706d25cf0 | 237 | // check for presence detect |
rs27 | 0:c57706d25cf0 | 238 | if (cmd[0] & DS2482_STATUS_PPD) |
rs27 | 0:c57706d25cf0 | 239 | { |
rs27 | 0:c57706d25cf0 | 240 | #if OW_MASTER_DEBUG |
rs27 | 1:0950824b1ca3 | 241 | pc.printf("\r\n*** 1-Wire Device detected"); |
rs27 | 0:c57706d25cf0 | 242 | #endif |
rs27 | 0:c57706d25cf0 | 243 | |
rs27 | 0:c57706d25cf0 | 244 | return true; |
rs27 | 0:c57706d25cf0 | 245 | } |
rs27 | 0:c57706d25cf0 | 246 | else |
rs27 | 0:c57706d25cf0 | 247 | { |
rs27 | 0:c57706d25cf0 | 248 | #if OW_MASTER_DEBUG |
rs27 | 1:0950824b1ca3 | 249 | pc.printf("\r\n---No Device detected"); |
rs27 | 0:c57706d25cf0 | 250 | #endif |
rs27 | 0:c57706d25cf0 | 251 | |
rs27 | 0:c57706d25cf0 | 252 | return false; |
rs27 | 0:c57706d25cf0 | 253 | } |
rs27 | 0:c57706d25cf0 | 254 | } |
rs27 | 0:c57706d25cf0 | 255 | |
rs27 | 0:c57706d25cf0 | 256 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 257 | // Send 1 bit of communication to the 1-Wire Net. |
rs27 | 0:c57706d25cf0 | 258 | // The parameter 'sendbit' least significant bit is used. |
rs27 | 0:c57706d25cf0 | 259 | // |
rs27 | 0:c57706d25cf0 | 260 | // 'sendbit' - 1 bit to send (least significant byte) |
rs27 | 0:c57706d25cf0 | 261 | // |
rs27 | 0:c57706d25cf0 | 262 | void DS2482::OWWriteBit(uint8_t sendbit) |
rs27 | 0:c57706d25cf0 | 263 | { |
rs27 | 0:c57706d25cf0 | 264 | OWTouchBit(sendbit); |
rs27 | 0:c57706d25cf0 | 265 | } |
rs27 | 0:c57706d25cf0 | 266 | |
rs27 | 0:c57706d25cf0 | 267 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 268 | // Reads 1 bit of communication from the 1-Wire Net and returns the |
rs27 | 0:c57706d25cf0 | 269 | // result |
rs27 | 0:c57706d25cf0 | 270 | // |
rs27 | 0:c57706d25cf0 | 271 | // Returns: 1 bit read from 1-Wire Net |
rs27 | 0:c57706d25cf0 | 272 | // |
rs27 | 0:c57706d25cf0 | 273 | uint8_t DS2482::OWReadBit(void) |
rs27 | 0:c57706d25cf0 | 274 | { |
rs27 | 0:c57706d25cf0 | 275 | return OWTouchBit(0x01); |
rs27 | 0:c57706d25cf0 | 276 | } |
rs27 | 0:c57706d25cf0 | 277 | |
rs27 | 0:c57706d25cf0 | 278 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 279 | // Send 1 bit of communication to the 1-Wire Net and return the |
rs27 | 0:c57706d25cf0 | 280 | // result 1 bit read from the 1-Wire Net. The parameter 'sendbit' |
rs27 | 0:c57706d25cf0 | 281 | // least significant bit is used and the least significant bit |
rs27 | 0:c57706d25cf0 | 282 | // of the result is the return bit. |
rs27 | 0:c57706d25cf0 | 283 | // |
rs27 | 0:c57706d25cf0 | 284 | // 'sendbit' - the least significant bit is the bit to send |
rs27 | 0:c57706d25cf0 | 285 | // |
rs27 | 0:c57706d25cf0 | 286 | // Returns: 0: 0 bit read from sendbit |
rs27 | 0:c57706d25cf0 | 287 | // 1: 1 bit read from sendbit |
rs27 | 0:c57706d25cf0 | 288 | // |
rs27 | 0:c57706d25cf0 | 289 | uint8_t DS2482::OWTouchBit(uint8_t sendbit) |
rs27 | 0:c57706d25cf0 | 290 | { |
rs27 | 0:c57706d25cf0 | 291 | char cmd[2]; |
rs27 | 0:c57706d25cf0 | 292 | uint8_t poll_count = 0; |
rs27 | 0:c57706d25cf0 | 293 | |
rs27 | 0:c57706d25cf0 | 294 | cmd[0] = DS2482_CMD_1WSB; |
rs27 | 0:c57706d25cf0 | 295 | cmd[1] = sendbit ? 0x80 : 0x00; |
rs27 | 0:c57706d25cf0 | 296 | i2c.write(addr, cmd, 2); |
rs27 | 0:c57706d25cf0 | 297 | |
rs27 | 0:c57706d25cf0 | 298 | // loop checking 1WB bit for completion of 1-Wire operation |
rs27 | 0:c57706d25cf0 | 299 | // abort if poll limit reached |
rs27 | 0:c57706d25cf0 | 300 | |
rs27 | 0:c57706d25cf0 | 301 | do |
rs27 | 0:c57706d25cf0 | 302 | { |
rs27 | 0:c57706d25cf0 | 303 | i2c.read(addr, cmd, 1); |
rs27 | 0:c57706d25cf0 | 304 | } |
rs27 | 0:c57706d25cf0 | 305 | while ((cmd[0] & DS2482_STATUS_1WB) && (poll_count++ < POLL_LIMIT)); |
rs27 | 0:c57706d25cf0 | 306 | |
rs27 | 0:c57706d25cf0 | 307 | #if OW_MASTER_DEBUG |
rs27 | 1:0950824b1ca3 | 308 | pc.printf("\r\n*** Send 1 bit to the 1-Wire Net"); |
rs27 | 0:c57706d25cf0 | 309 | #endif |
rs27 | 0:c57706d25cf0 | 310 | |
rs27 | 0:c57706d25cf0 | 311 | // check for failure due to poll limit reached |
rs27 | 0:c57706d25cf0 | 312 | if (poll_count >= POLL_LIMIT) |
rs27 | 0:c57706d25cf0 | 313 | { |
rs27 | 0:c57706d25cf0 | 314 | // handle error |
rs27 | 0:c57706d25cf0 | 315 | // ... |
rs27 | 0:c57706d25cf0 | 316 | #if OW_MASTER_DEBUG |
rs27 | 1:0950824b1ca3 | 317 | pc.printf("\r\n---handle error OW Write Bit"); |
rs27 | 0:c57706d25cf0 | 318 | #endif |
rs27 | 0:c57706d25cf0 | 319 | |
rs27 | 0:c57706d25cf0 | 320 | reset(); |
rs27 | 0:c57706d25cf0 | 321 | return 0; |
rs27 | 0:c57706d25cf0 | 322 | } |
rs27 | 0:c57706d25cf0 | 323 | |
rs27 | 0:c57706d25cf0 | 324 | // return bit state |
rs27 | 0:c57706d25cf0 | 325 | if (cmd[0] & DS2482_STATUS_SBR) |
rs27 | 0:c57706d25cf0 | 326 | { |
rs27 | 0:c57706d25cf0 | 327 | return 1; |
rs27 | 0:c57706d25cf0 | 328 | } |
rs27 | 0:c57706d25cf0 | 329 | else |
rs27 | 0:c57706d25cf0 | 330 | { |
rs27 | 0:c57706d25cf0 | 331 | return 0; |
rs27 | 0:c57706d25cf0 | 332 | } |
rs27 | 0:c57706d25cf0 | 333 | } |
rs27 | 0:c57706d25cf0 | 334 | |
rs27 | 0:c57706d25cf0 | 335 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 336 | // Send 8 bits of communication to the 1-Wire Net and verify that the |
rs27 | 0:c57706d25cf0 | 337 | // 8 bits read from the 1-Wire Net are the same (write operation). |
rs27 | 0:c57706d25cf0 | 338 | // The parameter 'sendbyte' least significant 8 bits are used. |
rs27 | 0:c57706d25cf0 | 339 | // |
rs27 | 0:c57706d25cf0 | 340 | // 'sendbyte' - 8 bits to send (least significant byte) |
rs27 | 0:c57706d25cf0 | 341 | // |
rs27 | 0:c57706d25cf0 | 342 | // Returns: TRUE: bytes written and echo was the same |
rs27 | 0:c57706d25cf0 | 343 | // FALSE: echo was not the same |
rs27 | 0:c57706d25cf0 | 344 | // |
rs27 | 0:c57706d25cf0 | 345 | void DS2482::OWWriteByte(uint8_t sendbyte) |
rs27 | 0:c57706d25cf0 | 346 | { |
rs27 | 0:c57706d25cf0 | 347 | char cmd[2]; |
rs27 | 0:c57706d25cf0 | 348 | uint8_t poll_count = 0; |
rs27 | 0:c57706d25cf0 | 349 | |
rs27 | 0:c57706d25cf0 | 350 | #if OW_MASTER_DEBUG |
rs27 | 1:0950824b1ca3 | 351 | pc.printf("\r\n*** Send 8 bits of WRITE to the 1-Wire Net"); |
rs27 | 0:c57706d25cf0 | 352 | #endif |
rs27 | 0:c57706d25cf0 | 353 | |
rs27 | 0:c57706d25cf0 | 354 | cmd[0] = DS2482_CMD_1WWB; |
rs27 | 0:c57706d25cf0 | 355 | cmd[1] = sendbyte; |
rs27 | 0:c57706d25cf0 | 356 | |
rs27 | 0:c57706d25cf0 | 357 | i2c.write(addr, cmd, 2); |
rs27 | 0:c57706d25cf0 | 358 | |
rs27 | 0:c57706d25cf0 | 359 | // loop checking 1WB bit for completion of 1-Wire operation |
rs27 | 0:c57706d25cf0 | 360 | // abort if poll limit reached |
rs27 | 0:c57706d25cf0 | 361 | |
rs27 | 0:c57706d25cf0 | 362 | do |
rs27 | 0:c57706d25cf0 | 363 | { |
rs27 | 0:c57706d25cf0 | 364 | i2c.read(addr, cmd, 1); |
rs27 | 0:c57706d25cf0 | 365 | } |
rs27 | 0:c57706d25cf0 | 366 | while ((cmd[0] & DS2482_STATUS_1WB) && (poll_count++ < POLL_LIMIT)); |
rs27 | 0:c57706d25cf0 | 367 | |
rs27 | 0:c57706d25cf0 | 368 | // check for failure due to poll limit reached |
rs27 | 0:c57706d25cf0 | 369 | if (poll_count >= POLL_LIMIT) |
rs27 | 0:c57706d25cf0 | 370 | { |
rs27 | 0:c57706d25cf0 | 371 | // handle error |
rs27 | 0:c57706d25cf0 | 372 | // ... |
rs27 | 0:c57706d25cf0 | 373 | #if OW_MASTER_DEBUG |
rs27 | 1:0950824b1ca3 | 374 | pc.printf("\r\n---handle error OW Write Byte"); |
rs27 | 0:c57706d25cf0 | 375 | #endif |
rs27 | 0:c57706d25cf0 | 376 | |
rs27 | 0:c57706d25cf0 | 377 | reset(); |
rs27 | 0:c57706d25cf0 | 378 | } |
rs27 | 1:0950824b1ca3 | 379 | |
rs27 | 1:0950824b1ca3 | 380 | #if OW_MASTER_DEBUG |
rs27 | 1:0950824b1ca3 | 381 | pc.printf(" done"); |
rs27 | 1:0950824b1ca3 | 382 | #endif |
rs27 | 0:c57706d25cf0 | 383 | } |
rs27 | 0:c57706d25cf0 | 384 | |
rs27 | 0:c57706d25cf0 | 385 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 386 | // Send 8 bits of read communication to the 1-Wire Net and return the |
rs27 | 0:c57706d25cf0 | 387 | // result 8 bits read from the 1-Wire Net. |
rs27 | 0:c57706d25cf0 | 388 | // |
rs27 | 0:c57706d25cf0 | 389 | // Returns: 8 bits read from 1-Wire Net |
rs27 | 0:c57706d25cf0 | 390 | // |
rs27 | 0:c57706d25cf0 | 391 | uint8_t DS2482::OWReadByte(void) |
rs27 | 0:c57706d25cf0 | 392 | { |
rs27 | 0:c57706d25cf0 | 393 | uint8_t poll_count = 0; |
rs27 | 0:c57706d25cf0 | 394 | char cmd[2]; |
rs27 | 0:c57706d25cf0 | 395 | |
rs27 | 0:c57706d25cf0 | 396 | #if OW_MASTER_DEBUG |
rs27 | 1:0950824b1ca3 | 397 | pc.printf("\r\n*** Read 8 bits from the 1-Wire Net"); |
rs27 | 0:c57706d25cf0 | 398 | #endif |
rs27 | 0:c57706d25cf0 | 399 | |
rs27 | 0:c57706d25cf0 | 400 | cmd[0] = DS2482_CMD_1WRB; // DS2482 1-Wire Read Byte |
rs27 | 0:c57706d25cf0 | 401 | i2c.write(addr, cmd, 1); |
rs27 | 0:c57706d25cf0 | 402 | |
rs27 | 0:c57706d25cf0 | 403 | // loop checking 1WB bit for completion of 1-Wire operation |
rs27 | 0:c57706d25cf0 | 404 | // abort if poll limit reached |
rs27 | 0:c57706d25cf0 | 405 | |
rs27 | 0:c57706d25cf0 | 406 | do |
rs27 | 0:c57706d25cf0 | 407 | { |
rs27 | 1:0950824b1ca3 | 408 | i2c.read(addr, cmd, 1); |
rs27 | 0:c57706d25cf0 | 409 | } |
rs27 | 0:c57706d25cf0 | 410 | while ((cmd[0] & DS2482_STATUS_1WB) && (poll_count++ < POLL_LIMIT)); |
rs27 | 0:c57706d25cf0 | 411 | |
rs27 | 0:c57706d25cf0 | 412 | // check for failure due to poll limit reached |
rs27 | 0:c57706d25cf0 | 413 | if (poll_count >= POLL_LIMIT) |
rs27 | 0:c57706d25cf0 | 414 | { |
rs27 | 0:c57706d25cf0 | 415 | // handle error |
rs27 | 0:c57706d25cf0 | 416 | // ... |
rs27 | 0:c57706d25cf0 | 417 | #if OW_MASTER_DEBUG |
rs27 | 1:0950824b1ca3 | 418 | pc.printf("\r\n---handle error OW Read Byte"); |
rs27 | 0:c57706d25cf0 | 419 | #endif |
rs27 | 0:c57706d25cf0 | 420 | |
rs27 | 0:c57706d25cf0 | 421 | reset(); |
rs27 | 0:c57706d25cf0 | 422 | return 0; |
rs27 | 0:c57706d25cf0 | 423 | } |
rs27 | 0:c57706d25cf0 | 424 | |
rs27 | 0:c57706d25cf0 | 425 | cmd[0] = DS2482_CMD_SRP; // DS2482 Set Read Pointer |
rs27 | 0:c57706d25cf0 | 426 | cmd[1] = DS2482_READPTR_RDR; // DS2482 Read Data Register |
rs27 | 1:0950824b1ca3 | 427 | i2c.write(addr, cmd, 2); |
rs27 | 0:c57706d25cf0 | 428 | |
rs27 | 1:0950824b1ca3 | 429 | i2c.read(addr, cmd, 1); |
rs27 | 0:c57706d25cf0 | 430 | |
rs27 | 0:c57706d25cf0 | 431 | return cmd[0]; |
rs27 | 0:c57706d25cf0 | 432 | } |
rs27 | 0:c57706d25cf0 | 433 | |
rs27 | 0:c57706d25cf0 | 434 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 435 | // The 'OWBlock' transfers a block of data to and from the |
rs27 | 0:c57706d25cf0 | 436 | // 1-Wire Net. The result is returned in the same buffer. |
rs27 | 0:c57706d25cf0 | 437 | // |
rs27 | 0:c57706d25cf0 | 438 | // 'tran_buf' - pointer to a block of unsigned |
rs27 | 0:c57706d25cf0 | 439 | // chars of length 'tran_len' that will be sent |
rs27 | 0:c57706d25cf0 | 440 | // to the 1-Wire Net |
rs27 | 0:c57706d25cf0 | 441 | // 'tran_len' - length in bytes to transfer |
rs27 | 0:c57706d25cf0 | 442 | // |
rs27 | 0:c57706d25cf0 | 443 | void DS2482::OWBlock(uint8_t *tran_buf, uint8_t tran_len) |
rs27 | 0:c57706d25cf0 | 444 | { |
rs27 | 0:c57706d25cf0 | 445 | uint8_t i; |
rs27 | 0:c57706d25cf0 | 446 | |
rs27 | 0:c57706d25cf0 | 447 | for (i = 0; i < tran_len; i++) |
rs27 | 0:c57706d25cf0 | 448 | { |
rs27 | 0:c57706d25cf0 | 449 | tran_buf[i] = OWTouchByte(tran_buf[i]); |
rs27 | 0:c57706d25cf0 | 450 | } |
rs27 | 0:c57706d25cf0 | 451 | } |
rs27 | 0:c57706d25cf0 | 452 | |
rs27 | 0:c57706d25cf0 | 453 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 454 | // Send 8 bits of communication to the 1-Wire Net and return the |
rs27 | 0:c57706d25cf0 | 455 | // result 8 bits read from the 1-Wire Net. The parameter 'sendbyte' |
rs27 | 0:c57706d25cf0 | 456 | // least significant 8 bits are used and the least significant 8 bits |
rs27 | 0:c57706d25cf0 | 457 | // of the result are the return byte. |
rs27 | 0:c57706d25cf0 | 458 | // |
rs27 | 0:c57706d25cf0 | 459 | // 'sendbyte' - 8 bits to send (least significant byte) |
rs27 | 0:c57706d25cf0 | 460 | // |
rs27 | 0:c57706d25cf0 | 461 | // Returns: 8 bits read from sendbyte |
rs27 | 0:c57706d25cf0 | 462 | // |
rs27 | 0:c57706d25cf0 | 463 | uint8_t DS2482::OWTouchByte(uint8_t sendbyte) |
rs27 | 0:c57706d25cf0 | 464 | { |
rs27 | 0:c57706d25cf0 | 465 | if (sendbyte == 0xFF) |
rs27 | 0:c57706d25cf0 | 466 | { |
rs27 | 0:c57706d25cf0 | 467 | return OWReadByte(); |
rs27 | 0:c57706d25cf0 | 468 | } |
rs27 | 0:c57706d25cf0 | 469 | else |
rs27 | 0:c57706d25cf0 | 470 | { |
rs27 | 0:c57706d25cf0 | 471 | OWWriteByte(sendbyte); |
rs27 | 0:c57706d25cf0 | 472 | return sendbyte; |
rs27 | 0:c57706d25cf0 | 473 | } |
rs27 | 0:c57706d25cf0 | 474 | } |
rs27 | 0:c57706d25cf0 | 475 | |
rs27 | 0:c57706d25cf0 | 476 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 477 | // Search state |
rs27 | 0:c57706d25cf0 | 478 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 479 | // Find the 'first' devices on the 1-Wire network |
rs27 | 0:c57706d25cf0 | 480 | // Return TRUE : device found, ROM number in ROM_NO buffer |
rs27 | 0:c57706d25cf0 | 481 | // FALSE : no device present |
rs27 | 0:c57706d25cf0 | 482 | // |
rs27 | 0:c57706d25cf0 | 483 | uint8_t DS2482::OWFirst(void) |
rs27 | 0:c57706d25cf0 | 484 | { |
rs27 | 0:c57706d25cf0 | 485 | // reset the search state |
rs27 | 0:c57706d25cf0 | 486 | LastDiscrepancy = 0; |
rs27 | 0:c57706d25cf0 | 487 | LastDeviceFlag = FALSE; |
rs27 | 0:c57706d25cf0 | 488 | LastFamilyDiscrepancy = 0; |
rs27 | 0:c57706d25cf0 | 489 | |
rs27 | 0:c57706d25cf0 | 490 | #if OW_MASTER_DEBUG |
rs27 | 1:0950824b1ca3 | 491 | pc.printf("\r\n*** Find the 'first' device on the 1-Wire network"); |
rs27 | 0:c57706d25cf0 | 492 | #endif |
rs27 | 0:c57706d25cf0 | 493 | |
rs27 | 0:c57706d25cf0 | 494 | return OWSearch(); |
rs27 | 0:c57706d25cf0 | 495 | } |
rs27 | 0:c57706d25cf0 | 496 | |
rs27 | 0:c57706d25cf0 | 497 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 498 | // Find the 'next' devices on the 1-Wire network |
rs27 | 0:c57706d25cf0 | 499 | // Return TRUE : device found, ROM number in ROM_NO buffer |
rs27 | 0:c57706d25cf0 | 500 | // FALSE : device not found, end of search |
rs27 | 0:c57706d25cf0 | 501 | // |
rs27 | 0:c57706d25cf0 | 502 | uint8_t DS2482::OWNext(void) |
rs27 | 0:c57706d25cf0 | 503 | { |
rs27 | 0:c57706d25cf0 | 504 | #if OW_MASTER_DEBUG |
rs27 | 1:0950824b1ca3 | 505 | pc.printf("\r\n*** Find the 'next' device on the 1-Wire network"); |
rs27 | 0:c57706d25cf0 | 506 | #endif |
rs27 | 0:c57706d25cf0 | 507 | |
rs27 | 0:c57706d25cf0 | 508 | // leave the search state alone |
rs27 | 0:c57706d25cf0 | 509 | return OWSearch(); |
rs27 | 0:c57706d25cf0 | 510 | } |
rs27 | 0:c57706d25cf0 | 511 | |
rs27 | 0:c57706d25cf0 | 512 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 513 | // Verify the device with the ROM number in ROM_NO buffer is present. |
rs27 | 0:c57706d25cf0 | 514 | // Return TRUE : device present |
rs27 | 0:c57706d25cf0 | 515 | // FALSE : device not present |
rs27 | 0:c57706d25cf0 | 516 | // |
rs27 | 0:c57706d25cf0 | 517 | int DS2482::OWVerify(void) |
rs27 | 0:c57706d25cf0 | 518 | { |
rs27 | 0:c57706d25cf0 | 519 | uint8_t rom_backup[8], status; |
rs27 | 0:c57706d25cf0 | 520 | int i,ld_backup,ldf_backup,lfd_backup; |
rs27 | 0:c57706d25cf0 | 521 | |
rs27 | 0:c57706d25cf0 | 522 | // keep a backup copy of the current state |
rs27 | 0:c57706d25cf0 | 523 | for (i = 0; i < 8; i++) |
rs27 | 0:c57706d25cf0 | 524 | { |
rs27 | 0:c57706d25cf0 | 525 | rom_backup[i] = ROM_NO[i]; |
rs27 | 0:c57706d25cf0 | 526 | } |
rs27 | 0:c57706d25cf0 | 527 | |
rs27 | 0:c57706d25cf0 | 528 | ld_backup = LastDiscrepancy; |
rs27 | 0:c57706d25cf0 | 529 | ldf_backup = LastDeviceFlag; |
rs27 | 0:c57706d25cf0 | 530 | lfd_backup = LastFamilyDiscrepancy; |
rs27 | 0:c57706d25cf0 | 531 | |
rs27 | 0:c57706d25cf0 | 532 | // set search to find the same device |
rs27 | 0:c57706d25cf0 | 533 | LastDiscrepancy = 64; |
rs27 | 0:c57706d25cf0 | 534 | LastDeviceFlag = FALSE; |
rs27 | 0:c57706d25cf0 | 535 | |
rs27 | 0:c57706d25cf0 | 536 | if (OWSearch()) |
rs27 | 0:c57706d25cf0 | 537 | { |
rs27 | 0:c57706d25cf0 | 538 | // check if same device found |
rs27 | 0:c57706d25cf0 | 539 | status = TRUE; |
rs27 | 0:c57706d25cf0 | 540 | |
rs27 | 0:c57706d25cf0 | 541 | for (i = 0; i < 8; i++) |
rs27 | 0:c57706d25cf0 | 542 | { |
rs27 | 0:c57706d25cf0 | 543 | if (rom_backup[i] != ROM_NO[i]) |
rs27 | 0:c57706d25cf0 | 544 | { |
rs27 | 0:c57706d25cf0 | 545 | status = FALSE; |
rs27 | 0:c57706d25cf0 | 546 | break; |
rs27 | 0:c57706d25cf0 | 547 | } |
rs27 | 0:c57706d25cf0 | 548 | } |
rs27 | 0:c57706d25cf0 | 549 | } |
rs27 | 0:c57706d25cf0 | 550 | else |
rs27 | 0:c57706d25cf0 | 551 | { |
rs27 | 0:c57706d25cf0 | 552 | status = FALSE; |
rs27 | 0:c57706d25cf0 | 553 | } |
rs27 | 0:c57706d25cf0 | 554 | |
rs27 | 0:c57706d25cf0 | 555 | // restore the search state |
rs27 | 0:c57706d25cf0 | 556 | for (i = 0; i < 8; i++) |
rs27 | 0:c57706d25cf0 | 557 | { |
rs27 | 0:c57706d25cf0 | 558 | ROM_NO[i] = rom_backup[i]; |
rs27 | 0:c57706d25cf0 | 559 | } |
rs27 | 0:c57706d25cf0 | 560 | LastDiscrepancy = ld_backup; |
rs27 | 0:c57706d25cf0 | 561 | LastDeviceFlag = ldf_backup; |
rs27 | 0:c57706d25cf0 | 562 | LastFamilyDiscrepancy = lfd_backup; |
rs27 | 0:c57706d25cf0 | 563 | |
rs27 | 0:c57706d25cf0 | 564 | // return the result of the verify |
rs27 | 0:c57706d25cf0 | 565 | #if OW_MASTER_DEBUG |
rs27 | 1:0950824b1ca3 | 566 | pc.printf("\r\n*** 1-Wire Verify device with the ROM number in ROM_NO"); |
rs27 | 0:c57706d25cf0 | 567 | #endif |
rs27 | 0:c57706d25cf0 | 568 | |
rs27 | 0:c57706d25cf0 | 569 | return status; |
rs27 | 0:c57706d25cf0 | 570 | } |
rs27 | 0:c57706d25cf0 | 571 | |
rs27 | 0:c57706d25cf0 | 572 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 573 | // Setup the search to find the device type 'family_code' on the next call |
rs27 | 0:c57706d25cf0 | 574 | // to OWNext() if it is present. |
rs27 | 0:c57706d25cf0 | 575 | // |
rs27 | 0:c57706d25cf0 | 576 | void DS2482::OWTargetSetup(uint8_t family_code) |
rs27 | 0:c57706d25cf0 | 577 | { |
rs27 | 0:c57706d25cf0 | 578 | uint8_t i; |
rs27 | 0:c57706d25cf0 | 579 | |
rs27 | 0:c57706d25cf0 | 580 | // set the search state to find SearchFamily type devices |
rs27 | 0:c57706d25cf0 | 581 | ROM_NO[0] = family_code; |
rs27 | 0:c57706d25cf0 | 582 | |
rs27 | 0:c57706d25cf0 | 583 | for (i = 1; i < 8; i++) |
rs27 | 0:c57706d25cf0 | 584 | { |
rs27 | 0:c57706d25cf0 | 585 | ROM_NO[i] = 0; |
rs27 | 0:c57706d25cf0 | 586 | } |
rs27 | 0:c57706d25cf0 | 587 | |
rs27 | 0:c57706d25cf0 | 588 | LastDiscrepancy = 64; |
rs27 | 0:c57706d25cf0 | 589 | LastFamilyDiscrepancy = 0; |
rs27 | 0:c57706d25cf0 | 590 | LastDeviceFlag = FALSE; |
rs27 | 0:c57706d25cf0 | 591 | } |
rs27 | 0:c57706d25cf0 | 592 | |
rs27 | 0:c57706d25cf0 | 593 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 594 | // Setup the search to skip the current device type on the next call |
rs27 | 0:c57706d25cf0 | 595 | // to OWNext(). |
rs27 | 0:c57706d25cf0 | 596 | // |
rs27 | 0:c57706d25cf0 | 597 | void DS2482::OWFamilySkipSetup(void) |
rs27 | 0:c57706d25cf0 | 598 | { |
rs27 | 0:c57706d25cf0 | 599 | // set the Last discrepancy to last family discrepancy |
rs27 | 0:c57706d25cf0 | 600 | LastDiscrepancy = LastFamilyDiscrepancy; |
rs27 | 0:c57706d25cf0 | 601 | |
rs27 | 0:c57706d25cf0 | 602 | // clear the last family discrpepancy |
rs27 | 0:c57706d25cf0 | 603 | LastFamilyDiscrepancy = 0; |
rs27 | 0:c57706d25cf0 | 604 | |
rs27 | 0:c57706d25cf0 | 605 | // check for end of list |
rs27 | 0:c57706d25cf0 | 606 | if (LastDiscrepancy == 0) |
rs27 | 0:c57706d25cf0 | 607 | { |
rs27 | 0:c57706d25cf0 | 608 | LastDeviceFlag = TRUE; |
rs27 | 0:c57706d25cf0 | 609 | } |
rs27 | 0:c57706d25cf0 | 610 | } |
rs27 | 0:c57706d25cf0 | 611 | |
rs27 | 0:c57706d25cf0 | 612 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 613 | // The 'OWSearch' function does a general search. This function |
rs27 | 0:c57706d25cf0 | 614 | // continues from the previous search state. The search state |
rs27 | 0:c57706d25cf0 | 615 | // can be reset by using the 'OWFirst' function. |
rs27 | 0:c57706d25cf0 | 616 | // This function contains one parameter 'alarm_only'. |
rs27 | 0:c57706d25cf0 | 617 | // When 'alarm_only' is TRUE (1) the find alarm command |
rs27 | 0:c57706d25cf0 | 618 | // 0xEC is sent instead of the normal search command 0xF0. |
rs27 | 0:c57706d25cf0 | 619 | // Using the find alarm command 0xEC will limit the search to only |
rs27 | 0:c57706d25cf0 | 620 | // 1-Wire devices that are in an 'alarm' state. |
rs27 | 0:c57706d25cf0 | 621 | // |
rs27 | 0:c57706d25cf0 | 622 | // Returns: TRUE (1) : when a 1-Wire device was found and its |
rs27 | 0:c57706d25cf0 | 623 | // Serial Number placed in the global ROM |
rs27 | 0:c57706d25cf0 | 624 | // FALSE (0): when no new device was found. Either the |
rs27 | 0:c57706d25cf0 | 625 | // last search was the last device or there |
rs27 | 0:c57706d25cf0 | 626 | // are no devices on the 1-Wire Net. |
rs27 | 0:c57706d25cf0 | 627 | // |
rs27 | 0:c57706d25cf0 | 628 | uint8_t DS2482::OWSearch() |
rs27 | 0:c57706d25cf0 | 629 | { |
rs27 | 0:c57706d25cf0 | 630 | int id_bit_number; |
rs27 | 0:c57706d25cf0 | 631 | int last_zero, rom_byte_number, search_result; |
rs27 | 0:c57706d25cf0 | 632 | int id_bit, cmp_id_bit; |
rs27 | 0:c57706d25cf0 | 633 | uint8_t rom_byte_mask, search_direction, status; |
rs27 | 0:c57706d25cf0 | 634 | |
rs27 | 0:c57706d25cf0 | 635 | // initialize for search |
rs27 | 0:c57706d25cf0 | 636 | id_bit_number = 1; |
rs27 | 0:c57706d25cf0 | 637 | last_zero = 0; |
rs27 | 0:c57706d25cf0 | 638 | rom_byte_number = 0; |
rs27 | 0:c57706d25cf0 | 639 | rom_byte_mask = 1; |
rs27 | 0:c57706d25cf0 | 640 | search_result = FALSE; |
rs27 | 0:c57706d25cf0 | 641 | crc_value = 0; |
rs27 | 0:c57706d25cf0 | 642 | |
rs27 | 1:0950824b1ca3 | 643 | #if OW_MASTER_DEBUG |
rs27 | 1:0950824b1ca3 | 644 | pc.printf("\r\n*** one wire search"); |
rs27 | 1:0950824b1ca3 | 645 | #endif |
rs27 | 1:0950824b1ca3 | 646 | |
rs27 | 0:c57706d25cf0 | 647 | if (!LastDeviceFlag) // if the last call was not the last one |
rs27 | 0:c57706d25cf0 | 648 | { |
rs27 | 0:c57706d25cf0 | 649 | // 1-Wire reset |
rs27 | 0:c57706d25cf0 | 650 | if (!OWReset()) |
rs27 | 0:c57706d25cf0 | 651 | { |
rs27 | 0:c57706d25cf0 | 652 | // reset the search |
rs27 | 0:c57706d25cf0 | 653 | LastDiscrepancy = 0; |
rs27 | 0:c57706d25cf0 | 654 | LastDeviceFlag = FALSE; |
rs27 | 0:c57706d25cf0 | 655 | LastFamilyDiscrepancy = 0; |
rs27 | 0:c57706d25cf0 | 656 | return FALSE; |
rs27 | 0:c57706d25cf0 | 657 | } |
rs27 | 0:c57706d25cf0 | 658 | |
rs27 | 0:c57706d25cf0 | 659 | // issue the search command |
rs27 | 0:c57706d25cf0 | 660 | OWWriteByte(OW_SEARCH_ROM); |
rs27 | 0:c57706d25cf0 | 661 | |
rs27 | 0:c57706d25cf0 | 662 | // loop to do the search |
rs27 | 0:c57706d25cf0 | 663 | do |
rs27 | 0:c57706d25cf0 | 664 | { |
rs27 | 0:c57706d25cf0 | 665 | // if this discrepancy if before the Last Discrepancy |
rs27 | 0:c57706d25cf0 | 666 | // on a previous next then pick the same as last time |
rs27 | 0:c57706d25cf0 | 667 | if (id_bit_number < LastDiscrepancy) |
rs27 | 0:c57706d25cf0 | 668 | { |
rs27 | 0:c57706d25cf0 | 669 | if ((ROM_NO[rom_byte_number] & rom_byte_mask) > 0) |
rs27 | 0:c57706d25cf0 | 670 | search_direction = 1; |
rs27 | 0:c57706d25cf0 | 671 | else |
rs27 | 0:c57706d25cf0 | 672 | search_direction = 0; |
rs27 | 0:c57706d25cf0 | 673 | } |
rs27 | 0:c57706d25cf0 | 674 | else |
rs27 | 0:c57706d25cf0 | 675 | { |
rs27 | 0:c57706d25cf0 | 676 | // if equal to last pick 1, if not then pick 0 |
rs27 | 0:c57706d25cf0 | 677 | if (id_bit_number == LastDiscrepancy) |
rs27 | 0:c57706d25cf0 | 678 | search_direction = 1; |
rs27 | 0:c57706d25cf0 | 679 | else |
rs27 | 0:c57706d25cf0 | 680 | search_direction = 0; |
rs27 | 0:c57706d25cf0 | 681 | } |
rs27 | 0:c57706d25cf0 | 682 | |
rs27 | 0:c57706d25cf0 | 683 | // Perform a triple operation on the DS2482 which will perform 2 read bits and 1 write bit |
rs27 | 1:0950824b1ca3 | 684 | //pc.printf("\n *** preform triplet operation "); |
rs27 | 0:c57706d25cf0 | 685 | status = search_triplet(search_direction); |
rs27 | 1:0950824b1ca3 | 686 | //pc.printf("%04x",status); |
rs27 | 1:0950824b1ca3 | 687 | |
rs27 | 0:c57706d25cf0 | 688 | // check bit results in status byte |
rs27 | 0:c57706d25cf0 | 689 | id_bit = ((status & DS2482_STATUS_SBR) == DS2482_STATUS_SBR); |
rs27 | 0:c57706d25cf0 | 690 | cmp_id_bit = ((status & DS2482_STATUS_TSB) == DS2482_STATUS_TSB); |
rs27 | 0:c57706d25cf0 | 691 | search_direction = ((status & DS2482_STATUS_DIR) == DS2482_STATUS_DIR) ? 1 : 0; |
rs27 | 0:c57706d25cf0 | 692 | |
rs27 | 0:c57706d25cf0 | 693 | // check for no devices on 1-Wire |
rs27 | 0:c57706d25cf0 | 694 | if ((id_bit) && (cmp_id_bit)) |
rs27 | 0:c57706d25cf0 | 695 | { |
rs27 | 0:c57706d25cf0 | 696 | break; |
rs27 | 0:c57706d25cf0 | 697 | } |
rs27 | 0:c57706d25cf0 | 698 | else |
rs27 | 0:c57706d25cf0 | 699 | { |
rs27 | 0:c57706d25cf0 | 700 | if ((!id_bit) && (!cmp_id_bit) && (search_direction == 0)) |
rs27 | 0:c57706d25cf0 | 701 | { |
rs27 | 0:c57706d25cf0 | 702 | last_zero = id_bit_number; |
rs27 | 0:c57706d25cf0 | 703 | |
rs27 | 0:c57706d25cf0 | 704 | // check for Last discrepancy in family |
rs27 | 0:c57706d25cf0 | 705 | if (last_zero < 9) |
rs27 | 0:c57706d25cf0 | 706 | { |
rs27 | 0:c57706d25cf0 | 707 | LastFamilyDiscrepancy = last_zero; |
rs27 | 0:c57706d25cf0 | 708 | } |
rs27 | 0:c57706d25cf0 | 709 | } |
rs27 | 0:c57706d25cf0 | 710 | |
rs27 | 0:c57706d25cf0 | 711 | // set or clear the bit in the ROM byte rom_byte_number |
rs27 | 0:c57706d25cf0 | 712 | // with mask rom_byte_mask |
rs27 | 0:c57706d25cf0 | 713 | if (search_direction == 1) |
rs27 | 0:c57706d25cf0 | 714 | { |
rs27 | 0:c57706d25cf0 | 715 | ROM_NO[rom_byte_number] |= rom_byte_mask; |
rs27 | 0:c57706d25cf0 | 716 | } |
rs27 | 0:c57706d25cf0 | 717 | else |
rs27 | 0:c57706d25cf0 | 718 | { |
rs27 | 0:c57706d25cf0 | 719 | ROM_NO[rom_byte_number] &= ~rom_byte_mask; |
rs27 | 0:c57706d25cf0 | 720 | } |
rs27 | 0:c57706d25cf0 | 721 | |
rs27 | 0:c57706d25cf0 | 722 | // increment the byte counter id_bit_number |
rs27 | 0:c57706d25cf0 | 723 | // and shift the mask rom_byte_mask |
rs27 | 0:c57706d25cf0 | 724 | id_bit_number++; |
rs27 | 0:c57706d25cf0 | 725 | rom_byte_mask <<= 1; |
rs27 | 0:c57706d25cf0 | 726 | |
rs27 | 0:c57706d25cf0 | 727 | // if the mask is 0 then go to new SerialNum byte rom_byte_number and reset mask |
rs27 | 0:c57706d25cf0 | 728 | if (rom_byte_mask == 0) |
rs27 | 0:c57706d25cf0 | 729 | { |
rs27 | 0:c57706d25cf0 | 730 | crc_calc(ROM_NO[rom_byte_number]); // accumulate the CRC |
rs27 | 0:c57706d25cf0 | 731 | rom_byte_number++; |
rs27 | 0:c57706d25cf0 | 732 | rom_byte_mask = 1; |
rs27 | 0:c57706d25cf0 | 733 | } |
rs27 | 0:c57706d25cf0 | 734 | } |
rs27 | 0:c57706d25cf0 | 735 | } |
rs27 | 0:c57706d25cf0 | 736 | while(rom_byte_number < 8); // loop until through all ROM bytes 0-7 |
rs27 | 0:c57706d25cf0 | 737 | |
rs27 | 0:c57706d25cf0 | 738 | // if the search was successful then |
rs27 | 0:c57706d25cf0 | 739 | if (!((id_bit_number < 65) || (crc_value != 0))) |
rs27 | 0:c57706d25cf0 | 740 | { |
rs27 | 0:c57706d25cf0 | 741 | // search successful so set LastDiscrepancy,LastDeviceFlag,search_result |
rs27 | 0:c57706d25cf0 | 742 | LastDiscrepancy = last_zero; |
rs27 | 0:c57706d25cf0 | 743 | |
rs27 | 0:c57706d25cf0 | 744 | // check for last device |
rs27 | 0:c57706d25cf0 | 745 | if (LastDiscrepancy == 0) |
rs27 | 0:c57706d25cf0 | 746 | { |
rs27 | 0:c57706d25cf0 | 747 | LastDeviceFlag = TRUE; |
rs27 | 0:c57706d25cf0 | 748 | } |
rs27 | 0:c57706d25cf0 | 749 | |
rs27 | 0:c57706d25cf0 | 750 | search_result = TRUE; |
rs27 | 0:c57706d25cf0 | 751 | } |
rs27 | 0:c57706d25cf0 | 752 | } |
rs27 | 0:c57706d25cf0 | 753 | |
rs27 | 0:c57706d25cf0 | 754 | // if no device found then reset counters so next 'search' will be like a first |
rs27 | 0:c57706d25cf0 | 755 | if (!search_result || (ROM_NO[0] == 0)) |
rs27 | 0:c57706d25cf0 | 756 | { |
rs27 | 0:c57706d25cf0 | 757 | LastDiscrepancy = 0; |
rs27 | 0:c57706d25cf0 | 758 | LastDeviceFlag = FALSE; |
rs27 | 0:c57706d25cf0 | 759 | LastFamilyDiscrepancy = 0; |
rs27 | 0:c57706d25cf0 | 760 | search_result = FALSE; |
rs27 | 0:c57706d25cf0 | 761 | } |
rs27 | 0:c57706d25cf0 | 762 | |
rs27 | 1:0950824b1ca3 | 763 | #if OW_MASTER_DEBUG |
rs27 | 1:0950824b1ca3 | 764 | pc.printf(" pass "); |
rs27 | 1:0950824b1ca3 | 765 | #endif |
rs27 | 1:0950824b1ca3 | 766 | |
rs27 | 0:c57706d25cf0 | 767 | return search_result; |
rs27 | 0:c57706d25cf0 | 768 | } |
rs27 | 0:c57706d25cf0 | 769 | |
rs27 | 0:c57706d25cf0 | 770 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 771 | // Use the DS2482 help command '1-Wire triplet' to perform one bit of a |
rs27 | 0:c57706d25cf0 | 772 | // 1-Wire search. |
rs27 | 0:c57706d25cf0 | 773 | // This command does two read bits and one write bit. The write bit |
rs27 | 0:c57706d25cf0 | 774 | // is either the default direction (all device have same bit) or in case of |
rs27 | 0:c57706d25cf0 | 775 | // a discrepancy, the 'search_direction' parameter is used. |
rs27 | 0:c57706d25cf0 | 776 | // |
rs27 | 0:c57706d25cf0 | 777 | // Returns – The DS2482 status byte result from the triplet command |
rs27 | 0:c57706d25cf0 | 778 | // |
rs27 | 0:c57706d25cf0 | 779 | uint8_t DS2482::search_triplet(uint8_t search_direction) |
rs27 | 0:c57706d25cf0 | 780 | { |
rs27 | 1:0950824b1ca3 | 781 | char cmd[2]; |
rs27 | 1:0950824b1ca3 | 782 | uint8_t status, poll_count = 0; |
rs27 | 0:c57706d25cf0 | 783 | |
rs27 | 1:0950824b1ca3 | 784 | cmd[0] = DS2482_CMD_1WT; |
rs27 | 1:0950824b1ca3 | 785 | cmd[1] = (search_direction ? 0x80 : 0x00); |
rs27 | 1:0950824b1ca3 | 786 | i2c.write(addr,cmd,2); |
rs27 | 1:0950824b1ca3 | 787 | |
rs27 | 0:c57706d25cf0 | 788 | do |
rs27 | 0:c57706d25cf0 | 789 | { |
rs27 | 1:0950824b1ca3 | 790 | i2c.read(addr,cmd,1); |
rs27 | 1:0950824b1ca3 | 791 | status = cmd[0]; |
rs27 | 0:c57706d25cf0 | 792 | } |
rs27 | 0:c57706d25cf0 | 793 | while ((status & DS2482_STATUS_1WB) && (poll_count++ < POLL_LIMIT)); |
rs27 | 0:c57706d25cf0 | 794 | |
rs27 | 0:c57706d25cf0 | 795 | // check for failure due to poll limit reached |
rs27 | 0:c57706d25cf0 | 796 | if (poll_count >= POLL_LIMIT) |
rs27 | 0:c57706d25cf0 | 797 | { |
rs27 | 0:c57706d25cf0 | 798 | // handle error |
rs27 | 0:c57706d25cf0 | 799 | // ... |
rs27 | 0:c57706d25cf0 | 800 | reset(); |
rs27 | 0:c57706d25cf0 | 801 | return 0; |
rs27 | 0:c57706d25cf0 | 802 | } |
rs27 | 0:c57706d25cf0 | 803 | // return status byte |
rs27 | 0:c57706d25cf0 | 804 | return status; |
rs27 | 0:c57706d25cf0 | 805 | } |
rs27 | 0:c57706d25cf0 | 806 | |
rs27 | 0:c57706d25cf0 | 807 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 808 | // Set the 1-Wire Net communication speed. |
rs27 | 0:c57706d25cf0 | 809 | // |
rs27 | 0:c57706d25cf0 | 810 | // 'new_speed' - new speed defined as |
rs27 | 0:c57706d25cf0 | 811 | // MODE_STANDARD 0x00 |
rs27 | 0:c57706d25cf0 | 812 | // MODE_OVERDRIVE 0x01 |
rs27 | 0:c57706d25cf0 | 813 | // |
rs27 | 0:c57706d25cf0 | 814 | // Returns: current 1-Wire Net speed |
rs27 | 0:c57706d25cf0 | 815 | // |
rs27 | 0:c57706d25cf0 | 816 | uint8_t DS2482::OWSpeed(uint8_t new_speed) |
rs27 | 0:c57706d25cf0 | 817 | { |
rs27 | 0:c57706d25cf0 | 818 | // set the speed |
rs27 | 0:c57706d25cf0 | 819 | if (new_speed == MODE_OVERDRIVE) |
rs27 | 0:c57706d25cf0 | 820 | { |
rs27 | 0:c57706d25cf0 | 821 | c1WS = DS2482_CFG_1WS; |
rs27 | 0:c57706d25cf0 | 822 | } |
rs27 | 0:c57706d25cf0 | 823 | else |
rs27 | 0:c57706d25cf0 | 824 | { |
rs27 | 0:c57706d25cf0 | 825 | c1WS = FALSE; |
rs27 | 0:c57706d25cf0 | 826 | } |
rs27 | 0:c57706d25cf0 | 827 | |
rs27 | 0:c57706d25cf0 | 828 | // write the new config |
rs27 | 0:c57706d25cf0 | 829 | write_config(c1WS | cSPU | cPPM | cAPU); |
rs27 | 0:c57706d25cf0 | 830 | |
rs27 | 0:c57706d25cf0 | 831 | |
rs27 | 0:c57706d25cf0 | 832 | return new_speed; |
rs27 | 0:c57706d25cf0 | 833 | } |
rs27 | 0:c57706d25cf0 | 834 | |
rs27 | 0:c57706d25cf0 | 835 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 836 | // Set the 1-Wire Net line level pullup to normal. The DS2482 only |
rs27 | 0:c57706d25cf0 | 837 | // allows enabling strong pullup on a bit or byte event. |
rs27 | 0:c57706d25cf0 | 838 | // Consequently this function only allows the MODE_STANDARD argument. |
rs27 | 0:c57706d25cf0 | 839 | // To enable strong pullup |
rs27 | 0:c57706d25cf0 | 840 | // use OWWriteBytePower or OWReadBitPower. |
rs27 | 0:c57706d25cf0 | 841 | // |
rs27 | 0:c57706d25cf0 | 842 | // 'new_level' - new level defined as |
rs27 | 0:c57706d25cf0 | 843 | // MODE_STANDARD 0x00 |
rs27 | 0:c57706d25cf0 | 844 | // |
rs27 | 0:c57706d25cf0 | 845 | // Returns: current 1-Wire Net level |
rs27 | 0:c57706d25cf0 | 846 | // |
rs27 | 0:c57706d25cf0 | 847 | uint8_t DS2482::OWLevel(uint8_t new_level) |
rs27 | 0:c57706d25cf0 | 848 | { |
rs27 | 0:c57706d25cf0 | 849 | // function only will turn back to non-strong pullup |
rs27 | 0:c57706d25cf0 | 850 | if (new_level != MODE_STANDARD) |
rs27 | 0:c57706d25cf0 | 851 | { |
rs27 | 0:c57706d25cf0 | 852 | return MODE_STRONG; |
rs27 | 0:c57706d25cf0 | 853 | } |
rs27 | 0:c57706d25cf0 | 854 | |
rs27 | 0:c57706d25cf0 | 855 | // clear the strong pullup bit in the global config state |
rs27 | 0:c57706d25cf0 | 856 | cSPU = FALSE; |
rs27 | 0:c57706d25cf0 | 857 | |
rs27 | 0:c57706d25cf0 | 858 | // write the new config |
rs27 | 0:c57706d25cf0 | 859 | write_config(c1WS | cSPU | cPPM | cAPU); |
rs27 | 0:c57706d25cf0 | 860 | |
rs27 | 0:c57706d25cf0 | 861 | |
rs27 | 0:c57706d25cf0 | 862 | return MODE_STANDARD; |
rs27 | 0:c57706d25cf0 | 863 | } |
rs27 | 0:c57706d25cf0 | 864 | |
rs27 | 0:c57706d25cf0 | 865 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 866 | // Send 1 bit of communication to the 1-Wire Net and verify that the |
rs27 | 0:c57706d25cf0 | 867 | // response matches the 'applyPowerResponse' bit and apply power delivery |
rs27 | 0:c57706d25cf0 | 868 | // to the 1-Wire net. Note that some implementations may apply the power |
rs27 | 0:c57706d25cf0 | 869 | // first and then turn it off if the response is incorrect. |
rs27 | 0:c57706d25cf0 | 870 | // |
rs27 | 0:c57706d25cf0 | 871 | // 'applyPowerResponse' - 1 bit response to check, if correct then start |
rs27 | 0:c57706d25cf0 | 872 | // power delivery |
rs27 | 0:c57706d25cf0 | 873 | // |
rs27 | 0:c57706d25cf0 | 874 | // Returns: TRUE: bit written and response correct, strong pullup now on |
rs27 | 0:c57706d25cf0 | 875 | // FALSE: response incorrect |
rs27 | 0:c57706d25cf0 | 876 | // |
rs27 | 0:c57706d25cf0 | 877 | uint8_t DS2482::OWReadBitPower(uint8_t applyPowerResponse) |
rs27 | 0:c57706d25cf0 | 878 | { |
rs27 | 0:c57706d25cf0 | 879 | uint8_t rdbit; |
rs27 | 0:c57706d25cf0 | 880 | |
rs27 | 0:c57706d25cf0 | 881 | // set strong pullup enable |
rs27 | 0:c57706d25cf0 | 882 | cSPU = DS2482_CFG_SPU; |
rs27 | 0:c57706d25cf0 | 883 | |
rs27 | 0:c57706d25cf0 | 884 | // write the new config |
rs27 | 0:c57706d25cf0 | 885 | if (!write_config(c1WS | cSPU | cPPM | cAPU)) |
rs27 | 0:c57706d25cf0 | 886 | { |
rs27 | 0:c57706d25cf0 | 887 | return FALSE; |
rs27 | 0:c57706d25cf0 | 888 | } |
rs27 | 0:c57706d25cf0 | 889 | |
rs27 | 0:c57706d25cf0 | 890 | // perform read bit |
rs27 | 0:c57706d25cf0 | 891 | rdbit = OWReadBit(); |
rs27 | 0:c57706d25cf0 | 892 | |
rs27 | 0:c57706d25cf0 | 893 | // check if response was correct, if not then turn off strong pullup |
rs27 | 0:c57706d25cf0 | 894 | if (rdbit != applyPowerResponse) |
rs27 | 0:c57706d25cf0 | 895 | { |
rs27 | 0:c57706d25cf0 | 896 | OWLevel(MODE_STANDARD); |
rs27 | 0:c57706d25cf0 | 897 | return FALSE; |
rs27 | 0:c57706d25cf0 | 898 | } |
rs27 | 0:c57706d25cf0 | 899 | |
rs27 | 0:c57706d25cf0 | 900 | return TRUE; |
rs27 | 0:c57706d25cf0 | 901 | } |
rs27 | 0:c57706d25cf0 | 902 | |
rs27 | 0:c57706d25cf0 | 903 | //-------------------------------------------------------------------------- |
rs27 | 0:c57706d25cf0 | 904 | // Send 8 bits of communication to the 1-Wire Net and verify that the |
rs27 | 0:c57706d25cf0 | 905 | // 8 bits read from the 1-Wire Net are the same (write operation). |
rs27 | 0:c57706d25cf0 | 906 | // The parameter 'sendbyte' least significant 8 bits are used. After the |
rs27 | 0:c57706d25cf0 | 907 | // 8 bits are sent change the level of the 1-Wire net. |
rs27 | 0:c57706d25cf0 | 908 | // |
rs27 | 0:c57706d25cf0 | 909 | // 'sendbyte' - 8 bits to send (least significant bit) |
rs27 | 0:c57706d25cf0 | 910 | // |
rs27 | 0:c57706d25cf0 | 911 | // Returns: TRUE: bytes written and echo was the same, strong pullup now on |
rs27 | 0:c57706d25cf0 | 912 | // FALSE: echo was not the same |
rs27 | 0:c57706d25cf0 | 913 | // |
rs27 | 0:c57706d25cf0 | 914 | uint8_t DS2482::OWWriteBytePower(uint8_t sendbyte) |
rs27 | 0:c57706d25cf0 | 915 | { |
rs27 | 0:c57706d25cf0 | 916 | // set strong pullup enable |
rs27 | 0:c57706d25cf0 | 917 | cSPU = DS2482_CFG_SPU; |
rs27 | 0:c57706d25cf0 | 918 | |
rs27 | 0:c57706d25cf0 | 919 | // write the new config |
rs27 | 0:c57706d25cf0 | 920 | if (!write_config(c1WS | cSPU | cPPM | cAPU)) |
rs27 | 0:c57706d25cf0 | 921 | { |
rs27 | 0:c57706d25cf0 | 922 | #if OW_MASTER_DEBUG |
rs27 | 1:0950824b1ca3 | 923 | pc.printf("\r\nSPU off"); |
rs27 | 0:c57706d25cf0 | 924 | #endif |
rs27 | 0:c57706d25cf0 | 925 | |
rs27 | 0:c57706d25cf0 | 926 | return FALSE; |
rs27 | 0:c57706d25cf0 | 927 | } |
rs27 | 0:c57706d25cf0 | 928 | |
rs27 | 0:c57706d25cf0 | 929 | // perform write byte |
rs27 | 0:c57706d25cf0 | 930 | OWWriteByte(sendbyte); |
rs27 | 0:c57706d25cf0 | 931 | |
rs27 | 0:c57706d25cf0 | 932 | return TRUE; |
rs27 | 0:c57706d25cf0 | 933 | } |
rs27 | 0:c57706d25cf0 | 934 | |
rs27 | 0:c57706d25cf0 | 935 | |
rs27 | 0:c57706d25cf0 | 936 | // end I2C DS2482 |
rs27 | 0:c57706d25cf0 | 937 | //====================================================================== |
rs27 | 0:c57706d25cf0 | 938 | |
rs27 | 1:0950824b1ca3 | 939 | //--------------------------------------------------------------------------- |
rs27 | 1:0950824b1ca3 | 940 | //-------------------------DS18XX OPERATIONS--------------------------------- |
rs27 | 1:0950824b1ca3 | 941 | //--------------------------------------------------------------------------- |
rs27 | 1:0950824b1ca3 | 942 | // find ALL devices on bus 1 |
rs27 | 1:0950824b1ca3 | 943 | // |
rs27 | 1:0950824b1ca3 | 944 | void DS2482::DS18XX_Read_Address(void) |
rs27 | 1:0950824b1ca3 | 945 | { |
rs27 | 1:0950824b1ca3 | 946 | uint8_t status, i, j; |
rs27 | 1:0950824b1ca3 | 947 | |
rs27 | 1:0950824b1ca3 | 948 | //-------------------------------------------------------------- |
rs27 | 1:0950824b1ca3 | 949 | // Device Tabele für bus 1 und bus 2 löschen |
rs27 | 1:0950824b1ca3 | 950 | |
rs27 | 1:0950824b1ca3 | 951 | for (i = 0; i < OW_MAX_DEVICES; i++) |
rs27 | 1:0950824b1ca3 | 952 | { |
rs27 | 1:0950824b1ca3 | 953 | for (j = 0; j < 8; j++) |
rs27 | 1:0950824b1ca3 | 954 | { |
rs27 | 1:0950824b1ca3 | 955 | ow.device_table[i].rom[j] = 0; |
rs27 | 1:0950824b1ca3 | 956 | } |
rs27 | 1:0950824b1ca3 | 957 | } |
rs27 | 1:0950824b1ca3 | 958 | |
rs27 | 1:0950824b1ca3 | 959 | // pc.printf("\n --- DS18xx_Read_Address --- "); |
rs27 | 1:0950824b1ca3 | 960 | // wait(0.1); |
rs27 | 1:0950824b1ca3 | 961 | |
rs27 | 1:0950824b1ca3 | 962 | ow.devices = 0; |
rs27 | 1:0950824b1ca3 | 963 | |
rs27 | 1:0950824b1ca3 | 964 | //-------------------------------------------------------------- |
rs27 | 1:0950824b1ca3 | 965 | // die Bausteine am Bus suchen |
rs27 | 1:0950824b1ca3 | 966 | |
rs27 | 1:0950824b1ca3 | 967 | ow.bus = 0; |
rs27 | 1:0950824b1ca3 | 968 | //pc.printf("\n -- detect -- \n"); |
rs27 | 1:0950824b1ca3 | 969 | //wait(0.5); |
rs27 | 1:0950824b1ca3 | 970 | detect(); // reset and init the 1-wire master |
rs27 | 1:0950824b1ca3 | 971 | |
rs27 | 1:0950824b1ca3 | 972 | //pc.printf("\n -- OWFirst --\n"); |
rs27 | 1:0950824b1ca3 | 973 | //wait(0.1); |
rs27 | 1:0950824b1ca3 | 974 | status = OWFirst(); |
rs27 | 1:0950824b1ca3 | 975 | |
rs27 | 1:0950824b1ca3 | 976 | if(status == 0) |
rs27 | 1:0950824b1ca3 | 977 | { |
rs27 | 1:0950824b1ca3 | 978 | #if OW_MASTER_START |
rs27 | 1:0950824b1ca3 | 979 | pc.printf("\r\nno 1-Wire slaves found"); |
rs27 | 1:0950824b1ca3 | 980 | #endif |
rs27 | 1:0950824b1ca3 | 981 | } |
rs27 | 1:0950824b1ca3 | 982 | |
rs27 | 1:0950824b1ca3 | 983 | while(status) |
rs27 | 1:0950824b1ca3 | 984 | { |
rs27 | 1:0950824b1ca3 | 985 | // TODO hier ins eeprom schreiben |
rs27 | 1:0950824b1ca3 | 986 | #if OW_MASTER_START |
rs27 | 1:0950824b1ca3 | 987 | pc.printf("\n*** #%02d ROM_NO= ",ow.devices); |
rs27 | 1:0950824b1ca3 | 988 | wait(0.1); |
rs27 | 1:0950824b1ca3 | 989 | #endif |
rs27 | 1:0950824b1ca3 | 990 | |
rs27 | 1:0950824b1ca3 | 991 | for (uint8_t i = 0; i < 8; i++) |
rs27 | 1:0950824b1ca3 | 992 | { |
rs27 | 1:0950824b1ca3 | 993 | ow.device_table[ow.devices].rom[i] = ROM_NO[i]; |
rs27 | 1:0950824b1ca3 | 994 | |
rs27 | 1:0950824b1ca3 | 995 | #if OW_MASTER_START |
rs27 | 1:0950824b1ca3 | 996 | pc.printf(" 0x%02x",ROM_NO[i]); |
rs27 | 1:0950824b1ca3 | 997 | wait (0.1); |
rs27 | 1:0950824b1ca3 | 998 | #endif |
rs27 | 1:0950824b1ca3 | 999 | } |
rs27 | 1:0950824b1ca3 | 1000 | ow.device_table[ow.devices].status = 0x01; // Wandler gefunden |
rs27 | 1:0950824b1ca3 | 1001 | |
rs27 | 1:0950824b1ca3 | 1002 | status = OWNext(); |
rs27 | 1:0950824b1ca3 | 1003 | ow.devices++; // Zeiger auf den nächsten freien Baustein |
rs27 | 1:0950824b1ca3 | 1004 | |
rs27 | 1:0950824b1ca3 | 1005 | // maximal 16 Bausteine |
rs27 | 1:0950824b1ca3 | 1006 | if (ow.devices >= OW_MAX_DEVICES) |
rs27 | 1:0950824b1ca3 | 1007 | { |
rs27 | 1:0950824b1ca3 | 1008 | ow.devices--; // zeiget auf den letzten gültigen Baustein |
rs27 | 1:0950824b1ca3 | 1009 | return; |
rs27 | 1:0950824b1ca3 | 1010 | } |
rs27 | 1:0950824b1ca3 | 1011 | } |
rs27 | 1:0950824b1ca3 | 1012 | |
rs27 | 1:0950824b1ca3 | 1013 | #if OW_MASTER_START |
rs27 | 1:0950824b1ca3 | 1014 | pc.printf("\r\n"); |
rs27 | 1:0950824b1ca3 | 1015 | #endif |
rs27 | 1:0950824b1ca3 | 1016 | |
rs27 | 1:0950824b1ca3 | 1017 | return; |
rs27 | 1:0950824b1ca3 | 1018 | } |
rs27 | 1:0950824b1ca3 | 1019 | |
rs27 | 1:0950824b1ca3 | 1020 | //--------------------------------------------------------------------------- |
rs27 | 1:0950824b1ca3 | 1021 | // |
rs27 | 1:0950824b1ca3 | 1022 | void DS2482::start_conversion(void) |
rs27 | 1:0950824b1ca3 | 1023 | { |
rs27 | 1:0950824b1ca3 | 1024 | //-------------------------------------------------------------- |
rs27 | 1:0950824b1ca3 | 1025 | // alle Bausteine an bus 0 starten |
rs27 | 1:0950824b1ca3 | 1026 | |
rs27 | 1:0950824b1ca3 | 1027 | ow.bus = 0; |
rs27 | 1:0950824b1ca3 | 1028 | |
rs27 | 1:0950824b1ca3 | 1029 | // find a DS18S20 |
rs27 | 1:0950824b1ca3 | 1030 | OWFirst(); |
rs27 | 1:0950824b1ca3 | 1031 | OWReset(); |
rs27 | 1:0950824b1ca3 | 1032 | |
rs27 | 1:0950824b1ca3 | 1033 | // address all devices |
rs27 | 1:0950824b1ca3 | 1034 | OWWriteByte(OW_SKIP_ROM); |
rs27 | 1:0950824b1ca3 | 1035 | |
rs27 | 1:0950824b1ca3 | 1036 | // Start Conversion and Config Strong Pull-Up |
rs27 | 1:0950824b1ca3 | 1037 | if (!OWWriteBytePower(OW_CONVERT_TEMP)) |
rs27 | 1:0950824b1ca3 | 1038 | { |
rs27 | 1:0950824b1ca3 | 1039 | #if OW_MASTER_DEBUG |
rs27 | 1:0950824b1ca3 | 1040 | pc.printf("Fail convert command\r\n"); |
rs27 | 1:0950824b1ca3 | 1041 | #endif |
rs27 | 1:0950824b1ca3 | 1042 | } |
rs27 | 1:0950824b1ca3 | 1043 | |
rs27 | 1:0950824b1ca3 | 1044 | //-------------------------------------------------------------- |
rs27 | 1:0950824b1ca3 | 1045 | // alle Bausteine an bus 1 starten |
rs27 | 1:0950824b1ca3 | 1046 | |
rs27 | 1:0950824b1ca3 | 1047 | ow.bus = 1; |
rs27 | 1:0950824b1ca3 | 1048 | |
rs27 | 1:0950824b1ca3 | 1049 | // find a DS18S20 |
rs27 | 1:0950824b1ca3 | 1050 | OWFirst(); |
rs27 | 1:0950824b1ca3 | 1051 | OWReset(); |
rs27 | 1:0950824b1ca3 | 1052 | |
rs27 | 1:0950824b1ca3 | 1053 | // address all devices |
rs27 | 1:0950824b1ca3 | 1054 | OWWriteByte(OW_SKIP_ROM); |
rs27 | 1:0950824b1ca3 | 1055 | |
rs27 | 1:0950824b1ca3 | 1056 | // Start Conversion and Config Strong Pull-Up |
rs27 | 1:0950824b1ca3 | 1057 | if (!OWWriteBytePower(OW_CONVERT_TEMP)) |
rs27 | 1:0950824b1ca3 | 1058 | { |
rs27 | 1:0950824b1ca3 | 1059 | #if OW_MASTER_DEBUG |
rs27 | 1:0950824b1ca3 | 1060 | pc.printf("Fail convert command\r\n"); |
rs27 | 1:0950824b1ca3 | 1061 | #endif |
rs27 | 1:0950824b1ca3 | 1062 | } |
rs27 | 1:0950824b1ca3 | 1063 | |
rs27 | 1:0950824b1ca3 | 1064 | } |
rs27 | 1:0950824b1ca3 | 1065 | |
rs27 | 1:0950824b1ca3 | 1066 | //----------------------------------------------------------------------------- |
rs27 | 1:0950824b1ca3 | 1067 | |
rs27 | 1:0950824b1ca3 | 1068 | bool DS2482::ow_read_rom(void) |
rs27 | 1:0950824b1ca3 | 1069 | { |
rs27 | 1:0950824b1ca3 | 1070 | uint8_t n; |
rs27 | 1:0950824b1ca3 | 1071 | |
rs27 | 1:0950824b1ca3 | 1072 | if ((ow.device_table[ow.device_table_index].status & 0x80) == 0) |
rs27 | 1:0950824b1ca3 | 1073 | ow.bus = 0; |
rs27 | 1:0950824b1ca3 | 1074 | else |
rs27 | 1:0950824b1ca3 | 1075 | ow.bus = 1; |
rs27 | 1:0950824b1ca3 | 1076 | |
rs27 | 1:0950824b1ca3 | 1077 | // Write Read ROM Code command |
rs27 | 1:0950824b1ca3 | 1078 | OWWriteByte(OW_CMD_READ_ROM); |
rs27 | 1:0950824b1ca3 | 1079 | |
rs27 | 1:0950824b1ca3 | 1080 | // Read 8 bytes of ROM code |
rs27 | 1:0950824b1ca3 | 1081 | for (n = 0; n < 8; n++) |
rs27 | 1:0950824b1ca3 | 1082 | { |
rs27 | 1:0950824b1ca3 | 1083 | ow_rom_code[n] = OWReadByte(); |
rs27 | 1:0950824b1ca3 | 1084 | } |
rs27 | 1:0950824b1ca3 | 1085 | |
rs27 | 1:0950824b1ca3 | 1086 | // Do Cyclic Redundancy Check |
rs27 | 1:0950824b1ca3 | 1087 | if (crc_calc_buffer(&ow_rom_code[0],7) != ow_rom_code[7]) |
rs27 | 1:0950824b1ca3 | 1088 | { |
rs27 | 1:0950824b1ca3 | 1089 | ow_flags |= OW_CRC_ERROR; |
rs27 | 1:0950824b1ca3 | 1090 | |
rs27 | 1:0950824b1ca3 | 1091 | return false; |
rs27 | 1:0950824b1ca3 | 1092 | } |
rs27 | 1:0950824b1ca3 | 1093 | |
rs27 | 1:0950824b1ca3 | 1094 | return true; |
rs27 | 1:0950824b1ca3 | 1095 | } |
rs27 | 1:0950824b1ca3 | 1096 | |
rs27 | 1:0950824b1ca3 | 1097 | //----------------------------------------------------------------------------- |
rs27 | 1:0950824b1ca3 | 1098 | |
rs27 | 1:0950824b1ca3 | 1099 | bool DS2482::ow_read_scratchpad(void) |
rs27 | 1:0950824b1ca3 | 1100 | { |
rs27 | 1:0950824b1ca3 | 1101 | uint8_t i, crc; |
rs27 | 1:0950824b1ca3 | 1102 | |
rs27 | 1:0950824b1ca3 | 1103 | ow_flags = 0; |
rs27 | 1:0950824b1ca3 | 1104 | |
rs27 | 1:0950824b1ca3 | 1105 | if ((ow.device_table[ow.device_table_index].status & 0x80) == 0) |
rs27 | 1:0950824b1ca3 | 1106 | ow.bus = 0; |
rs27 | 1:0950824b1ca3 | 1107 | else |
rs27 | 1:0950824b1ca3 | 1108 | ow.bus = 1; |
rs27 | 1:0950824b1ca3 | 1109 | |
rs27 | 1:0950824b1ca3 | 1110 | if (!OWReset()) return false; |
rs27 | 1:0950824b1ca3 | 1111 | |
rs27 | 1:0950824b1ca3 | 1112 | // select the device |
rs27 | 1:0950824b1ca3 | 1113 | // den Baustein wird über den ROM Code adressiert |
rs27 | 1:0950824b1ca3 | 1114 | OWWriteByte(OW_CMD_MATCH_ROM); // 0x55 match command |
rs27 | 1:0950824b1ca3 | 1115 | |
rs27 | 1:0950824b1ca3 | 1116 | for (i = 0; i < 8; i++) |
rs27 | 1:0950824b1ca3 | 1117 | { |
rs27 | 1:0950824b1ca3 | 1118 | OWWriteByte(ow.device_table[ow.device_table_index].rom[i]); |
rs27 | 1:0950824b1ca3 | 1119 | } |
rs27 | 1:0950824b1ca3 | 1120 | |
rs27 | 1:0950824b1ca3 | 1121 | OWWriteByte(OW_CMD_READ_SCRATCHPAD); // Read Scratch pad 0xBE |
rs27 | 1:0950824b1ca3 | 1122 | |
rs27 | 1:0950824b1ca3 | 1123 | // Read 9 bytes of scratchpad memory |
rs27 | 1:0950824b1ca3 | 1124 | for (i = 0; i < OW_SCRATCHPAD_BYTES; i++) |
rs27 | 1:0950824b1ca3 | 1125 | { |
rs27 | 1:0950824b1ca3 | 1126 | crc = OWReadByte(); |
rs27 | 1:0950824b1ca3 | 1127 | ow_scratchpad[i] = crc; |
rs27 | 1:0950824b1ca3 | 1128 | } |
rs27 | 1:0950824b1ca3 | 1129 | |
rs27 | 1:0950824b1ca3 | 1130 | #if OW_MASTER_DEBUG |
rs27 | 1:0950824b1ca3 | 1131 | |
rs27 | 1:0950824b1ca3 | 1132 | pc.printf("\n*** Scratch_Val "); |
rs27 | 1:0950824b1ca3 | 1133 | |
rs27 | 1:0950824b1ca3 | 1134 | for (i = 1; i < OW_SCRATCHPAD_BYTES; i++) |
rs27 | 1:0950824b1ca3 | 1135 | { |
rs27 | 1:0950824b1ca3 | 1136 | pc.printf(":0x%02x",ow_scratchpad[i]); |
rs27 | 1:0950824b1ca3 | 1137 | } |
rs27 | 1:0950824b1ca3 | 1138 | |
rs27 | 1:0950824b1ca3 | 1139 | pc.printf("\r\n"); |
rs27 | 1:0950824b1ca3 | 1140 | |
rs27 | 1:0950824b1ca3 | 1141 | #endif |
rs27 | 1:0950824b1ca3 | 1142 | |
rs27 | 1:0950824b1ca3 | 1143 | |
rs27 | 1:0950824b1ca3 | 1144 | return true; |
rs27 | 1:0950824b1ca3 | 1145 | } |
rs27 | 1:0950824b1ca3 | 1146 | |
rs27 | 1:0950824b1ca3 | 1147 | //----------------------------------------------------------------------------- |
rs27 | 1:0950824b1ca3 | 1148 | |
rs27 | 1:0950824b1ca3 | 1149 | bool DS2482::ow_read_scratchpad_ds2438(uint8_t page) |
rs27 | 1:0950824b1ca3 | 1150 | { |
rs27 | 1:0950824b1ca3 | 1151 | uint8_t n, crc; |
rs27 | 1:0950824b1ca3 | 1152 | |
rs27 | 1:0950824b1ca3 | 1153 | ow_flags = 0; |
rs27 | 1:0950824b1ca3 | 1154 | |
rs27 | 1:0950824b1ca3 | 1155 | if ((ow.device_table[ow.device_table_index].status & 0x80) == 0) |
rs27 | 1:0950824b1ca3 | 1156 | ow.bus = 0; |
rs27 | 1:0950824b1ca3 | 1157 | else |
rs27 | 1:0950824b1ca3 | 1158 | ow.bus = 1; |
rs27 | 1:0950824b1ca3 | 1159 | |
rs27 | 1:0950824b1ca3 | 1160 | if (!OWReset()) return false; |
rs27 | 1:0950824b1ca3 | 1161 | |
rs27 | 1:0950824b1ca3 | 1162 | // select the device |
rs27 | 1:0950824b1ca3 | 1163 | // den Baustein wird über den ROM Code adressiert |
rs27 | 1:0950824b1ca3 | 1164 | OWWriteByte(OW_CMD_MATCH_ROM); // 0x55 match command |
rs27 | 1:0950824b1ca3 | 1165 | |
rs27 | 1:0950824b1ca3 | 1166 | for (n = 0; n < 8; n++) |
rs27 | 1:0950824b1ca3 | 1167 | { |
rs27 | 1:0950824b1ca3 | 1168 | OWWriteByte(ow.device_table[ow.device_table_index].rom[n]); |
rs27 | 1:0950824b1ca3 | 1169 | } |
rs27 | 1:0950824b1ca3 | 1170 | |
rs27 | 1:0950824b1ca3 | 1171 | // Write command to read scratchpad memory |
rs27 | 1:0950824b1ca3 | 1172 | OWWriteByte(0xbe); // 0xBE |
rs27 | 1:0950824b1ca3 | 1173 | OWWriteByte(page); // 0x03 |
rs27 | 1:0950824b1ca3 | 1174 | |
rs27 | 1:0950824b1ca3 | 1175 | // Read 9 bytes of scratchpad memory |
rs27 | 1:0950824b1ca3 | 1176 | for (n = 0; n < OW_SCRATCHPAD_BYTES; n++) |
rs27 | 1:0950824b1ca3 | 1177 | { |
rs27 | 1:0950824b1ca3 | 1178 | crc = OWReadByte(); |
rs27 | 1:0950824b1ca3 | 1179 | ow_scratchpad[n] = crc; |
rs27 | 1:0950824b1ca3 | 1180 | // printf_P(PSTR("%02x "),crc); |
rs27 | 1:0950824b1ca3 | 1181 | } |
rs27 | 1:0950824b1ca3 | 1182 | |
rs27 | 1:0950824b1ca3 | 1183 | crc = crc_calc_buffer(ow_scratchpad,8); |
rs27 | 1:0950824b1ca3 | 1184 | |
rs27 | 1:0950824b1ca3 | 1185 | // Calculate CRC |
rs27 | 1:0950824b1ca3 | 1186 | if (crc != ow_scratchpad[8]) |
rs27 | 1:0950824b1ca3 | 1187 | { |
rs27 | 1:0950824b1ca3 | 1188 | ow_flags |= OW_CRC_ERROR; |
rs27 | 1:0950824b1ca3 | 1189 | // Read 9 bytes of scratchpad memory |
rs27 | 1:0950824b1ca3 | 1190 | pc.printf("\now_read_scratchpad: "); |
rs27 | 1:0950824b1ca3 | 1191 | for (n = 0; n < OW_SCRATCHPAD_BYTES; n++) |
rs27 | 1:0950824b1ca3 | 1192 | { |
rs27 | 1:0950824b1ca3 | 1193 | pc.printf("%02x ",ow_scratchpad[n]); |
rs27 | 1:0950824b1ca3 | 1194 | } |
rs27 | 1:0950824b1ca3 | 1195 | pc.printf(": CRC error %02x",crc); |
rs27 | 1:0950824b1ca3 | 1196 | return false; |
rs27 | 1:0950824b1ca3 | 1197 | } |
rs27 | 1:0950824b1ca3 | 1198 | return true; |
rs27 | 1:0950824b1ca3 | 1199 | } |
rs27 | 1:0950824b1ca3 | 1200 | |
rs27 | 1:0950824b1ca3 | 1201 | //---------------------------------------------------------------------------- |
rs27 | 1:0950824b1ca3 | 1202 | |
rs27 | 1:0950824b1ca3 | 1203 | bool DS2482::ow_write_scratchpad_ds18x20 (uint8_t th, uint8_t tl) |
rs27 | 1:0950824b1ca3 | 1204 | { |
rs27 | 1:0950824b1ca3 | 1205 | uint8_t i; |
rs27 | 1:0950824b1ca3 | 1206 | |
rs27 | 1:0950824b1ca3 | 1207 | if ((ow.device_table[ow.device_table_index].status & 0x80) == 0) |
rs27 | 1:0950824b1ca3 | 1208 | ow.bus = 0; |
rs27 | 1:0950824b1ca3 | 1209 | else |
rs27 | 1:0950824b1ca3 | 1210 | ow.bus = 1; |
rs27 | 1:0950824b1ca3 | 1211 | |
rs27 | 1:0950824b1ca3 | 1212 | // Do bus reset |
rs27 | 1:0950824b1ca3 | 1213 | if (!OWReset()) return false; |
rs27 | 1:0950824b1ca3 | 1214 | |
rs27 | 1:0950824b1ca3 | 1215 | // select the device |
rs27 | 1:0950824b1ca3 | 1216 | // den Baustein wird über den ROM Code adressiert |
rs27 | 1:0950824b1ca3 | 1217 | OWWriteByte(OW_CMD_MATCH_ROM); // 0x55 match command |
rs27 | 1:0950824b1ca3 | 1218 | |
rs27 | 1:0950824b1ca3 | 1219 | for (i = 0; i < 8; i++) |
rs27 | 1:0950824b1ca3 | 1220 | { |
rs27 | 1:0950824b1ca3 | 1221 | OWWriteByte(ow.device_table[ow.device_table_index].rom[i]); |
rs27 | 1:0950824b1ca3 | 1222 | } |
rs27 | 1:0950824b1ca3 | 1223 | |
rs27 | 1:0950824b1ca3 | 1224 | |
rs27 | 1:0950824b1ca3 | 1225 | // Write command to read scratchpad memory |
rs27 | 1:0950824b1ca3 | 1226 | OWWriteByte(OW_CMD_WRITE_SCRATCHPAD); |
rs27 | 1:0950824b1ca3 | 1227 | |
rs27 | 1:0950824b1ca3 | 1228 | // Write 1 byte at scratchpad memory |
rs27 | 1:0950824b1ca3 | 1229 | OWWriteByte(th); // Th |
rs27 | 1:0950824b1ca3 | 1230 | wait_us(8); // ist für das Timing der 8 MHZ CPU notwendig |
rs27 | 1:0950824b1ca3 | 1231 | |
rs27 | 1:0950824b1ca3 | 1232 | // Write 1 byte at scratchpad memory |
rs27 | 1:0950824b1ca3 | 1233 | OWWriteByte(tl); // Th |
rs27 | 1:0950824b1ca3 | 1234 | wait_us(8); // ist für das Timing der 8 MHZ CPU notwendig |
rs27 | 1:0950824b1ca3 | 1235 | |
rs27 | 1:0950824b1ca3 | 1236 | // Write 1 byte at scratchpad memory |
rs27 | 1:0950824b1ca3 | 1237 | OWWriteByte(0x7F); // 12 Bit Auflösung |
rs27 | 1:0950824b1ca3 | 1238 | wait_us(8); // ist für das Timing der 8 MHZ CPU notwendig |
rs27 | 1:0950824b1ca3 | 1239 | |
rs27 | 1:0950824b1ca3 | 1240 | return true; |
rs27 | 1:0950824b1ca3 | 1241 | } |
rs27 | 1:0950824b1ca3 | 1242 | |
rs27 | 1:0950824b1ca3 | 1243 | //---------------------------------------------------------------------------- |
rs27 | 1:0950824b1ca3 | 1244 | bool DS2482::ow_write_scratchpad_ds2438 (uint8_t th, uint8_t tl) |
rs27 | 1:0950824b1ca3 | 1245 | { |
rs27 | 1:0950824b1ca3 | 1246 | |
rs27 | 1:0950824b1ca3 | 1247 | uint8_t i; |
rs27 | 1:0950824b1ca3 | 1248 | |
rs27 | 1:0950824b1ca3 | 1249 | if ((ow.device_table[ow.device_table_index].status & 0x80) == 0) |
rs27 | 1:0950824b1ca3 | 1250 | ow.bus = 0; |
rs27 | 1:0950824b1ca3 | 1251 | else |
rs27 | 1:0950824b1ca3 | 1252 | ow.bus = 1; |
rs27 | 1:0950824b1ca3 | 1253 | |
rs27 | 1:0950824b1ca3 | 1254 | // Do bus reset |
rs27 | 1:0950824b1ca3 | 1255 | if (!OWReset()) return false; |
rs27 | 1:0950824b1ca3 | 1256 | |
rs27 | 1:0950824b1ca3 | 1257 | // select the device |
rs27 | 1:0950824b1ca3 | 1258 | // den Baustein wird über den ROM Code adressiert |
rs27 | 1:0950824b1ca3 | 1259 | OWWriteByte(OW_CMD_MATCH_ROM); // 0x55 match command |
rs27 | 1:0950824b1ca3 | 1260 | |
rs27 | 1:0950824b1ca3 | 1261 | for (i = 0; i < 8; i++) |
rs27 | 1:0950824b1ca3 | 1262 | { |
rs27 | 1:0950824b1ca3 | 1263 | OWWriteByte(ow.device_table[ow.device_table_index].rom[i]); |
rs27 | 1:0950824b1ca3 | 1264 | } |
rs27 | 1:0950824b1ca3 | 1265 | |
rs27 | 1:0950824b1ca3 | 1266 | // Write command to read scratchpad memory |
rs27 | 1:0950824b1ca3 | 1267 | OWWriteByte(0x4E); |
rs27 | 1:0950824b1ca3 | 1268 | OWWriteByte(0x03); |
rs27 | 1:0950824b1ca3 | 1269 | |
rs27 | 1:0950824b1ca3 | 1270 | // Write 3 bytes to scratchpad memory |
rs27 | 1:0950824b1ca3 | 1271 | OWWriteByte(th); // Th |
rs27 | 1:0950824b1ca3 | 1272 | wait_us(8); |
rs27 | 1:0950824b1ca3 | 1273 | |
rs27 | 1:0950824b1ca3 | 1274 | OWWriteByte(tl); // Tl |
rs27 | 1:0950824b1ca3 | 1275 | wait_us(8); |
rs27 | 1:0950824b1ca3 | 1276 | |
rs27 | 1:0950824b1ca3 | 1277 | return true; |
rs27 | 1:0950824b1ca3 | 1278 | } |
rs27 | 1:0950824b1ca3 | 1279 | |
rs27 | 1:0950824b1ca3 | 1280 | //---------------------------------------------------------------------------- |
rs27 | 1:0950824b1ca3 | 1281 | bool DS2482::ow_write_eeprom_ds18x20 (void) |
rs27 | 1:0950824b1ca3 | 1282 | { |
rs27 | 1:0950824b1ca3 | 1283 | |
rs27 | 1:0950824b1ca3 | 1284 | uint8_t i; |
rs27 | 1:0950824b1ca3 | 1285 | |
rs27 | 1:0950824b1ca3 | 1286 | if ((ow.device_table[ow.device_table_index].status & 0x80) == 0) |
rs27 | 1:0950824b1ca3 | 1287 | ow.bus = 0; |
rs27 | 1:0950824b1ca3 | 1288 | else |
rs27 | 1:0950824b1ca3 | 1289 | ow.bus = 1; |
rs27 | 1:0950824b1ca3 | 1290 | |
rs27 | 1:0950824b1ca3 | 1291 | // Do bus reset |
rs27 | 1:0950824b1ca3 | 1292 | if (!OWReset()) return false; |
rs27 | 1:0950824b1ca3 | 1293 | |
rs27 | 1:0950824b1ca3 | 1294 | // select the device |
rs27 | 1:0950824b1ca3 | 1295 | // den Baustein wird über den ROM Code adressiert |
rs27 | 1:0950824b1ca3 | 1296 | OWWriteByte(OW_CMD_MATCH_ROM); // 0x55 match command |
rs27 | 1:0950824b1ca3 | 1297 | |
rs27 | 1:0950824b1ca3 | 1298 | for (i = 0; i < 8; i++) |
rs27 | 1:0950824b1ca3 | 1299 | { |
rs27 | 1:0950824b1ca3 | 1300 | OWWriteByte(ow.device_table[ow.device_table_index].rom[i]); |
rs27 | 1:0950824b1ca3 | 1301 | } |
rs27 | 1:0950824b1ca3 | 1302 | |
rs27 | 1:0950824b1ca3 | 1303 | // Write command to write eeprom |
rs27 | 1:0950824b1ca3 | 1304 | OWWriteByte(0x48); |
rs27 | 1:0950824b1ca3 | 1305 | |
rs27 | 1:0950824b1ca3 | 1306 | return true; |
rs27 | 1:0950824b1ca3 | 1307 | |
rs27 | 1:0950824b1ca3 | 1308 | } |
rs27 | 1:0950824b1ca3 | 1309 | |
rs27 | 1:0950824b1ca3 | 1310 | //---------------------------------------------------------------------------- |
rs27 | 1:0950824b1ca3 | 1311 | bool DS2482::ow_write_eeprom_ds2438 (void) |
rs27 | 1:0950824b1ca3 | 1312 | { |
rs27 | 1:0950824b1ca3 | 1313 | uint8_t i; |
rs27 | 1:0950824b1ca3 | 1314 | |
rs27 | 1:0950824b1ca3 | 1315 | if ((ow.device_table[ow.device_table_index].status & 0x80) == 0) |
rs27 | 1:0950824b1ca3 | 1316 | ow.bus = 0; |
rs27 | 1:0950824b1ca3 | 1317 | else |
rs27 | 1:0950824b1ca3 | 1318 | ow.bus = 1; |
rs27 | 1:0950824b1ca3 | 1319 | |
rs27 | 1:0950824b1ca3 | 1320 | // Do bus reset |
rs27 | 1:0950824b1ca3 | 1321 | if (!OWReset()) return false; |
rs27 | 1:0950824b1ca3 | 1322 | |
rs27 | 1:0950824b1ca3 | 1323 | // select the device |
rs27 | 1:0950824b1ca3 | 1324 | // den Baustein wird über den ROM Code adressiert |
rs27 | 1:0950824b1ca3 | 1325 | OWWriteByte(OW_CMD_MATCH_ROM); // 0x55 match command |
rs27 | 1:0950824b1ca3 | 1326 | |
rs27 | 1:0950824b1ca3 | 1327 | for (i = 0; i < 8; i++) |
rs27 | 1:0950824b1ca3 | 1328 | { |
rs27 | 1:0950824b1ca3 | 1329 | OWWriteByte(ow.device_table[ow.device_table_index].rom[i]); |
rs27 | 1:0950824b1ca3 | 1330 | } |
rs27 | 1:0950824b1ca3 | 1331 | |
rs27 | 1:0950824b1ca3 | 1332 | // Write command to read scratchpad memory |
rs27 | 1:0950824b1ca3 | 1333 | OWWriteByte(0x48); |
rs27 | 1:0950824b1ca3 | 1334 | OWWriteByte(0x03); |
rs27 | 1:0950824b1ca3 | 1335 | |
rs27 | 1:0950824b1ca3 | 1336 | return true; |
rs27 | 1:0950824b1ca3 | 1337 | } |
rs27 | 1:0950824b1ca3 | 1338 | |
rs27 | 1:0950824b1ca3 | 1339 | |
rs27 | 1:0950824b1ca3 | 1340 | //---------------------------------------------------------------------------- |
rs27 | 1:0950824b1ca3 | 1341 | |
rs27 | 1:0950824b1ca3 | 1342 | void DS2482::ow_read_address (void) |
rs27 | 1:0950824b1ca3 | 1343 | { |
rs27 | 1:0950824b1ca3 | 1344 | uint8_t n; |
rs27 | 1:0950824b1ca3 | 1345 | |
rs27 | 1:0950824b1ca3 | 1346 | // ow Adressen aus den Bausteinen lesen |
rs27 | 1:0950824b1ca3 | 1347 | for (n = 0; n < OW_MAX_DEVICES; n++) |
rs27 | 1:0950824b1ca3 | 1348 | { |
rs27 | 1:0950824b1ca3 | 1349 | if ((ow.device_table[n].status & 0x0f) == 1) |
rs27 | 1:0950824b1ca3 | 1350 | { |
rs27 | 1:0950824b1ca3 | 1351 | // printf_P(PSTR("\n device table %d"),n); |
rs27 | 1:0950824b1ca3 | 1352 | ow.device_table_index = n; |
rs27 | 1:0950824b1ca3 | 1353 | |
rs27 | 1:0950824b1ca3 | 1354 | if ((ow.device_table[ow.device_table_index].status & 0x80) == 0) |
rs27 | 1:0950824b1ca3 | 1355 | ow.bus = 0; |
rs27 | 1:0950824b1ca3 | 1356 | else |
rs27 | 1:0950824b1ca3 | 1357 | ow.bus = 1; |
rs27 | 1:0950824b1ca3 | 1358 | |
rs27 | 1:0950824b1ca3 | 1359 | if ((ow.device_table[n].rom[0] == 0x10) || (ow.device_table[n].rom[0] == 0x28)) |
rs27 | 1:0950824b1ca3 | 1360 | { |
rs27 | 1:0950824b1ca3 | 1361 | if (ow_read_scratchpad()) |
rs27 | 1:0950824b1ca3 | 1362 | { |
rs27 | 1:0950824b1ca3 | 1363 | if(ow_scratchpad[2] == ow_scratchpad[3]) ow.device_table[n].adr = ow_scratchpad[3]; |
rs27 | 1:0950824b1ca3 | 1364 | } |
rs27 | 1:0950824b1ca3 | 1365 | } |
rs27 | 1:0950824b1ca3 | 1366 | |
rs27 | 1:0950824b1ca3 | 1367 | if ((ow.device_table[n].rom[0] == 0xa6) || (ow.device_table[n].rom[0] == 0x26)) |
rs27 | 1:0950824b1ca3 | 1368 | { |
rs27 | 1:0950824b1ca3 | 1369 | if (ow_read_scratchpad_ds2438(0x03)) |
rs27 | 1:0950824b1ca3 | 1370 | { |
rs27 | 1:0950824b1ca3 | 1371 | if(ow_scratchpad[0] == ow_scratchpad[1]) ow.device_table[n].adr = ow_scratchpad[0]; |
rs27 | 1:0950824b1ca3 | 1372 | |
rs27 | 1:0950824b1ca3 | 1373 | } |
rs27 | 1:0950824b1ca3 | 1374 | } |
rs27 | 1:0950824b1ca3 | 1375 | |
rs27 | 1:0950824b1ca3 | 1376 | } |
rs27 | 1:0950824b1ca3 | 1377 | |
rs27 | 1:0950824b1ca3 | 1378 | } // end for(... |
rs27 | 1:0950824b1ca3 | 1379 | } |
rs27 | 1:0950824b1ca3 | 1380 |