TI HDC1000 Temperature and Humidity Sensor
HDC1000.cpp@2:f574cd898cba, 2017-04-18 (annotated)
- Committer:
- Rhyme
- Date:
- Tue Apr 18 02:44:57 2017 +0000
- Revision:
- 2:f574cd898cba
- Parent:
- 1:f2c04c5b28ab
Documentation writing started
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Rhyme | 0:1db0d0071723 | 1 | #include "mbed.h" |
Rhyme | 0:1db0d0071723 | 2 | #include "HDC1000.h" |
Rhyme | 0:1db0d0071723 | 3 | |
Rhyme | 0:1db0d0071723 | 4 | #define REG_TEMPERATURE 0x00 |
Rhyme | 0:1db0d0071723 | 5 | #define REG_HUMIDITY 0x01 |
Rhyme | 0:1db0d0071723 | 6 | #define REG_CONFIGURATION 0x02 |
Rhyme | 0:1db0d0071723 | 7 | #define REG_ID_FIRST_WORD 0xFB |
Rhyme | 0:1db0d0071723 | 8 | #define REG_ID_SECOND_WORD 0xFC |
Rhyme | 0:1db0d0071723 | 9 | #define REG_ID_LAST_BYTE 0xFD |
Rhyme | 0:1db0d0071723 | 10 | #define REG_MANUFACTURE_ID 0xFE |
Rhyme | 0:1db0d0071723 | 11 | #define REG_DEVICE_ID 0xFF |
Rhyme | 0:1db0d0071723 | 12 | |
Rhyme | 0:1db0d0071723 | 13 | /* Bit field of Configuration register */ |
Rhyme | 0:1db0d0071723 | 14 | /* bit[15] RST Sowtware Rest Bit 0: Normal 1: Reset |
Rhyme | 0:1db0d0071723 | 15 | * bit[14:13] (Reserved) must be 00 |
Rhyme | 0:1db0d0071723 | 16 | * bit[12] MODE 0:Aquire Temp/Hum separately(16bit each) 1:Aquire both Temp/Hum same time (32bit) |
Rhyme | 0:1db0d0071723 | 17 | * bit[11] BTST Battery Test(?) 0:VDD > 2.8V 1:VDD < 2.8V |
Rhyme | 0:1db0d0071723 | 18 | * bit[10] TRES Temperature Resolution 0:14bit 1:11bit |
Rhyme | 0:1db0d0071723 | 19 | * bit[9:8] HRES Humidity Resolution 00:14bit 01:11bit 10:8bit |
Rhyme | 0:1db0d0071723 | 20 | * bit[7:0] (Reserved) must be 00000000 |
Rhyme | 0:1db0d0071723 | 21 | */ |
Rhyme | 0:1db0d0071723 | 22 | #define BIT_RESET 0x8000 |
Rhyme | 0:1db0d0071723 | 23 | #define BIT_MODE 0x1000 |
Rhyme | 0:1db0d0071723 | 24 | #define BIT_BTST 0x0800 |
Rhyme | 0:1db0d0071723 | 25 | #define BIT_TRES 0x0400 |
Rhyme | 0:1db0d0071723 | 26 | #define BIT_HRES14 0x0000 |
Rhyme | 0:1db0d0071723 | 27 | #define BIT_HRES11 0x0100 |
Rhyme | 0:1db0d0071723 | 28 | #define BIT_HRES08 0x0200 |
Rhyme | 0:1db0d0071723 | 29 | |
Rhyme | 2:f574cd898cba | 30 | #if USE_READY_PIN |
Rhyme | 0:1db0d0071723 | 31 | HDC1000::HDC1000(PinName sda, PinName scl, PinName rdy, int addr) : m_i2c(sda, scl), m_rdy(rdy), m_addr(addr<<1) { |
Rhyme | 2:f574cd898cba | 32 | #else |
Rhyme | 2:f574cd898cba | 33 | HDC1000::HDC1000(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr<<1) { |
Rhyme | 2:f574cd898cba | 34 | #endif |
Rhyme | 0:1db0d0071723 | 35 | // activate the peripheral |
Rhyme | 0:1db0d0071723 | 36 | } |
Rhyme | 0:1db0d0071723 | 37 | |
Rhyme | 0:1db0d0071723 | 38 | HDC1000::~HDC1000(void) |
Rhyme | 0:1db0d0071723 | 39 | { |
Rhyme | 0:1db0d0071723 | 40 | } |
Rhyme | 0:1db0d0071723 | 41 | |
Rhyme | 0:1db0d0071723 | 42 | void HDC1000::reset(void) |
Rhyme | 0:1db0d0071723 | 43 | { |
Rhyme | 0:1db0d0071723 | 44 | uint16_t conf = 0x8000 ; |
Rhyme | 0:1db0d0071723 | 45 | setConfig(conf) ; |
Rhyme | 0:1db0d0071723 | 46 | } |
Rhyme | 0:1db0d0071723 | 47 | |
Rhyme | 1:f2c04c5b28ab | 48 | float HDC1000::u2f_temp(uint16_t utemp) |
Rhyme | 1:f2c04c5b28ab | 49 | { |
Rhyme | 1:f2c04c5b28ab | 50 | float ftemp ; |
Rhyme | 1:f2c04c5b28ab | 51 | |
Rhyme | 1:f2c04c5b28ab | 52 | utemp = (utemp >> 2) & 0x3FFF ; |
Rhyme | 1:f2c04c5b28ab | 53 | // note: the data sheet suggests to use 0x10000 for denominator |
Rhyme | 1:f2c04c5b28ab | 54 | // but to allow 100% I chose 0xFFFF instead, I may be wrong |
Rhyme | 1:f2c04c5b28ab | 55 | ftemp = ((float)(utemp)/ (float)0x3FFF)*165.0 - 40.0 ; |
Rhyme | 1:f2c04c5b28ab | 56 | return( ftemp ) ; |
Rhyme | 1:f2c04c5b28ab | 57 | } |
Rhyme | 1:f2c04c5b28ab | 58 | |
Rhyme | 1:f2c04c5b28ab | 59 | float HDC1000::u2f_hume(uint16_t uhume) |
Rhyme | 1:f2c04c5b28ab | 60 | { |
Rhyme | 1:f2c04c5b28ab | 61 | float fhume ; |
Rhyme | 1:f2c04c5b28ab | 62 | uhume = (uhume>>2) & 0x3FFF ; |
Rhyme | 1:f2c04c5b28ab | 63 | |
Rhyme | 1:f2c04c5b28ab | 64 | // note: the data sheet suggests to use 0x10000 for denominator |
Rhyme | 1:f2c04c5b28ab | 65 | // but to allow 100% I chose 0xFFFF instead, I may be wrong |
Rhyme | 1:f2c04c5b28ab | 66 | fhume = ((float)(uhume) / (float)0x3FFF) * 100.0 ; |
Rhyme | 1:f2c04c5b28ab | 67 | return( fhume ) ; |
Rhyme | 1:f2c04c5b28ab | 68 | } |
Rhyme | 1:f2c04c5b28ab | 69 | |
Rhyme | 0:1db0d0071723 | 70 | float HDC1000::readTemperature(void) |
Rhyme | 0:1db0d0071723 | 71 | { |
Rhyme | 0:1db0d0071723 | 72 | uint16_t utemp, uhum ; |
Rhyme | 0:1db0d0071723 | 73 | int mode ; |
Rhyme | 0:1db0d0071723 | 74 | float ftemp ; |
Rhyme | 0:1db0d0071723 | 75 | |
Rhyme | 0:1db0d0071723 | 76 | mode = getMode() ; |
Rhyme | 0:1db0d0071723 | 77 | switch(mode) { |
Rhyme | 0:1db0d0071723 | 78 | case 0: /* temp or hum can be acquired */ |
Rhyme | 0:1db0d0071723 | 79 | utemp = getTemperature() ; |
Rhyme | 0:1db0d0071723 | 80 | break ; |
Rhyme | 0:1db0d0071723 | 81 | case 1: /* temp and hum can be acquired */ |
Rhyme | 0:1db0d0071723 | 82 | getData(&utemp, &uhum) ; |
Rhyme | 0:1db0d0071723 | 83 | break ; |
Rhyme | 0:1db0d0071723 | 84 | default: |
Rhyme | 0:1db0d0071723 | 85 | printf("Error: unexpected mode %d\n",mode) ; |
Rhyme | 0:1db0d0071723 | 86 | break ; |
Rhyme | 0:1db0d0071723 | 87 | } |
Rhyme | 1:f2c04c5b28ab | 88 | |
Rhyme | 2:f574cd898cba | 89 | // printf("utemp = 0x%04X ", utemp) ; |
Rhyme | 1:f2c04c5b28ab | 90 | ftemp = u2f_temp(utemp) ; |
Rhyme | 0:1db0d0071723 | 91 | return( ftemp ) ; |
Rhyme | 0:1db0d0071723 | 92 | } |
Rhyme | 0:1db0d0071723 | 93 | |
Rhyme | 0:1db0d0071723 | 94 | float HDC1000::readHumidity(void) |
Rhyme | 0:1db0d0071723 | 95 | { |
Rhyme | 0:1db0d0071723 | 96 | uint16_t utemp, uhume ; |
Rhyme | 0:1db0d0071723 | 97 | int mode ; |
Rhyme | 1:f2c04c5b28ab | 98 | float fhume ; |
Rhyme | 0:1db0d0071723 | 99 | |
Rhyme | 0:1db0d0071723 | 100 | mode = getMode() ; |
Rhyme | 0:1db0d0071723 | 101 | switch(mode) { |
Rhyme | 0:1db0d0071723 | 102 | case 0: /* temp or hum can be acquired */ |
Rhyme | 0:1db0d0071723 | 103 | uhume = getHumidity() ; |
Rhyme | 0:1db0d0071723 | 104 | break ; |
Rhyme | 0:1db0d0071723 | 105 | case 1: /* temp and hum can be acquired */ |
Rhyme | 0:1db0d0071723 | 106 | getData(&utemp, &uhume) ; |
Rhyme | 0:1db0d0071723 | 107 | break ; |
Rhyme | 0:1db0d0071723 | 108 | default: |
Rhyme | 0:1db0d0071723 | 109 | printf("Error: unexpected mode %d\n",mode) ; |
Rhyme | 0:1db0d0071723 | 110 | break ; |
Rhyme | 0:1db0d0071723 | 111 | } |
Rhyme | 1:f2c04c5b28ab | 112 | |
Rhyme | 2:f574cd898cba | 113 | // printf("uhume = 0x%04X\n", uhume) ; |
Rhyme | 1:f2c04c5b28ab | 114 | fhume = u2f_hume(uhume) ; |
Rhyme | 1:f2c04c5b28ab | 115 | return( fhume ) ; |
Rhyme | 0:1db0d0071723 | 116 | } |
Rhyme | 0:1db0d0071723 | 117 | |
Rhyme | 0:1db0d0071723 | 118 | void HDC1000::readData(float *ftemp, float *fhume) |
Rhyme | 0:1db0d0071723 | 119 | { |
Rhyme | 0:1db0d0071723 | 120 | uint16_t utemp, uhume ; |
Rhyme | 0:1db0d0071723 | 121 | getData(&utemp, &uhume) ; |
Rhyme | 2:f574cd898cba | 122 | // printf("utemp: 0x%04X, uhume: 0x%04X\n", utemp, uhume) ; |
Rhyme | 1:f2c04c5b28ab | 123 | *ftemp = u2f_temp(utemp) ; |
Rhyme | 1:f2c04c5b28ab | 124 | *fhume = u2f_hume(uhume) ; |
Rhyme | 0:1db0d0071723 | 125 | } |
Rhyme | 2:f574cd898cba | 126 | |
Rhyme | 0:1db0d0071723 | 127 | /* for mode 0 */ |
Rhyme | 0:1db0d0071723 | 128 | uint16_t HDC1000::getTemperature(void) |
Rhyme | 0:1db0d0071723 | 129 | { |
Rhyme | 0:1db0d0071723 | 130 | uint16_t temp ; |
Rhyme | 0:1db0d0071723 | 131 | uint8_t data[2] ; |
Rhyme | 2:f574cd898cba | 132 | #if USE_READY_PIN |
Rhyme | 0:1db0d0071723 | 133 | float delay ; |
Rhyme | 2:f574cd898cba | 134 | #endif |
Rhyme | 0:1db0d0071723 | 135 | data[0] = REG_TEMPERATURE ; |
Rhyme | 0:1db0d0071723 | 136 | data[1] = (m_addr << 1) | 0x01 ; |
Rhyme | 0:1db0d0071723 | 137 | m_i2c.write(m_addr, (const char*)data, 2, true); |
Rhyme | 2:f574cd898cba | 138 | |
Rhyme | 2:f574cd898cba | 139 | #if USE_READY_PIN |
Rhyme | 0:1db0d0071723 | 140 | while(m_rdy == 1) { } /* wait for rdy */ |
Rhyme | 2:f574cd898cba | 141 | #else |
Rhyme | 2:f574cd898cba | 142 | delay = getTDelay() ; |
Rhyme | 2:f574cd898cba | 143 | printf("Temp Delay = %.2f\n", delay) ; |
Rhyme | 2:f574cd898cba | 144 | wait_us(1000 * delay) ; |
Rhyme | 2:f574cd898cba | 145 | #endif |
Rhyme | 0:1db0d0071723 | 146 | |
Rhyme | 0:1db0d0071723 | 147 | m_i2c.read(m_addr, (char *)data, 2); |
Rhyme | 0:1db0d0071723 | 148 | temp = (data[0] << 8) | data[1] ; |
Rhyme | 0:1db0d0071723 | 149 | return( temp ) ; |
Rhyme | 0:1db0d0071723 | 150 | } |
Rhyme | 0:1db0d0071723 | 151 | |
Rhyme | 0:1db0d0071723 | 152 | uint16_t HDC1000::getHumidity(void) |
Rhyme | 0:1db0d0071723 | 153 | { |
Rhyme | 0:1db0d0071723 | 154 | uint16_t hume ; |
Rhyme | 0:1db0d0071723 | 155 | uint8_t data[2] ; |
Rhyme | 2:f574cd898cba | 156 | #if USE_READY_PIN |
Rhyme | 0:1db0d0071723 | 157 | float delay ; |
Rhyme | 2:f574cd898cba | 158 | #endif |
Rhyme | 2:f574cd898cba | 159 | |
Rhyme | 0:1db0d0071723 | 160 | data[0] = REG_HUMIDITY ; |
Rhyme | 0:1db0d0071723 | 161 | data[1] = (m_addr << 1) | 0x01 ; |
Rhyme | 0:1db0d0071723 | 162 | m_i2c.write(m_addr, (const char*)data, 2, true); |
Rhyme | 0:1db0d0071723 | 163 | |
Rhyme | 2:f574cd898cba | 164 | #if USE_READY_PIN |
Rhyme | 0:1db0d0071723 | 165 | while(m_rdy == 1) { } /* wait for rdy */ |
Rhyme | 2:f574cd898cba | 166 | #else |
Rhyme | 2:f574cd898cba | 167 | delay = getHDelay() ; |
Rhyme | 2:f574cd898cba | 168 | printf("Hume Delay = %.2f\n", delay) ; |
Rhyme | 2:f574cd898cba | 169 | wait_us(1000 * delay) ; |
Rhyme | 2:f574cd898cba | 170 | #endif |
Rhyme | 0:1db0d0071723 | 171 | |
Rhyme | 0:1db0d0071723 | 172 | m_i2c.read(m_addr, (char *)data, 2); |
Rhyme | 0:1db0d0071723 | 173 | hume = (data[0] << 8) | data[1] ; |
Rhyme | 0:1db0d0071723 | 174 | return( hume ) ; |
Rhyme | 0:1db0d0071723 | 175 | } |
Rhyme | 0:1db0d0071723 | 176 | |
Rhyme | 0:1db0d0071723 | 177 | /* for mode 1 */ |
Rhyme | 0:1db0d0071723 | 178 | void HDC1000::getData(uint16_t *temp, uint16_t *hume) |
Rhyme | 0:1db0d0071723 | 179 | { |
Rhyme | 0:1db0d0071723 | 180 | uint8_t data[4] = { 0, 0, 0, 0 } ; |
Rhyme | 0:1db0d0071723 | 181 | int mode ; |
Rhyme | 2:f574cd898cba | 182 | #if USE_READY_PIN |
Rhyme | 2:f574cd898cba | 183 | float delay ; |
Rhyme | 2:f574cd898cba | 184 | #endif |
Rhyme | 0:1db0d0071723 | 185 | |
Rhyme | 0:1db0d0071723 | 186 | mode = getMode() ; |
Rhyme | 0:1db0d0071723 | 187 | if (mode == 0) { |
Rhyme | 0:1db0d0071723 | 188 | *temp = getTemperature() ; |
Rhyme | 0:1db0d0071723 | 189 | *hume = getHumidity() ; |
Rhyme | 0:1db0d0071723 | 190 | } else { /* mode == 1 */ |
Rhyme | 0:1db0d0071723 | 191 | data[0] = REG_TEMPERATURE ; |
Rhyme | 0:1db0d0071723 | 192 | data[1] = (m_addr << 1) | 0x01 ; |
Rhyme | 0:1db0d0071723 | 193 | m_i2c.write(m_addr,(const char *)data, 2, false); |
Rhyme | 2:f574cd898cba | 194 | #if USE_READY_PIN |
Rhyme | 0:1db0d0071723 | 195 | while(m_rdy == 1) { } /* wait for rdy */ |
Rhyme | 2:f574cd898cba | 196 | #else |
Rhyme | 2:f574cd898cba | 197 | delay = getTDelay() + getHDelay() ; |
Rhyme | 2:f574cd898cba | 198 | printf("Delay = %.2f ms\n", delay) ; |
Rhyme | 2:f574cd898cba | 199 | wait( delay / 1000.0 ) ; |
Rhyme | 2:f574cd898cba | 200 | #endif |
Rhyme | 0:1db0d0071723 | 201 | m_i2c.read(m_addr, (char *)data, 4); |
Rhyme | 0:1db0d0071723 | 202 | *temp = (data[0] << 8) | data[1] ; |
Rhyme | 0:1db0d0071723 | 203 | *hume = (data[2] << 8) | data[3] ; |
Rhyme | 0:1db0d0071723 | 204 | } |
Rhyme | 0:1db0d0071723 | 205 | } |
Rhyme | 0:1db0d0071723 | 206 | |
Rhyme | 0:1db0d0071723 | 207 | void HDC1000::setConfig(uint16_t conf) |
Rhyme | 0:1db0d0071723 | 208 | { |
Rhyme | 0:1db0d0071723 | 209 | uint8_t data[3] ; |
Rhyme | 0:1db0d0071723 | 210 | data[0] = REG_CONFIGURATION ; |
Rhyme | 0:1db0d0071723 | 211 | data[1] = (conf >> 8) & 0xFF ; |
Rhyme | 0:1db0d0071723 | 212 | data[2] = conf & 0xFF ; |
Rhyme | 0:1db0d0071723 | 213 | writeRegs(data, 3) ; |
Rhyme | 0:1db0d0071723 | 214 | } |
Rhyme | 0:1db0d0071723 | 215 | |
Rhyme | 0:1db0d0071723 | 216 | uint16_t HDC1000::getConfig(void) |
Rhyme | 0:1db0d0071723 | 217 | { |
Rhyme | 0:1db0d0071723 | 218 | uint8_t data[2] ; |
Rhyme | 0:1db0d0071723 | 219 | uint16_t conf ; |
Rhyme | 0:1db0d0071723 | 220 | readRegs(REG_CONFIGURATION, data, 2) ; |
Rhyme | 0:1db0d0071723 | 221 | conf = (data[0] << 8) | data[1] ; |
Rhyme | 0:1db0d0071723 | 222 | return( conf ) ; |
Rhyme | 0:1db0d0071723 | 223 | } |
Rhyme | 0:1db0d0071723 | 224 | |
Rhyme | 0:1db0d0071723 | 225 | void HDC1000::setMode(int mode) |
Rhyme | 0:1db0d0071723 | 226 | { |
Rhyme | 0:1db0d0071723 | 227 | uint16_t conf ; |
Rhyme | 0:1db0d0071723 | 228 | conf = getConfig() ; |
Rhyme | 0:1db0d0071723 | 229 | if (mode) { |
Rhyme | 0:1db0d0071723 | 230 | conf |= BIT_MODE ; |
Rhyme | 0:1db0d0071723 | 231 | } else { |
Rhyme | 0:1db0d0071723 | 232 | conf ^= BIT_MODE ; |
Rhyme | 0:1db0d0071723 | 233 | } |
Rhyme | 0:1db0d0071723 | 234 | setConfig( conf ) ; |
Rhyme | 0:1db0d0071723 | 235 | } |
Rhyme | 0:1db0d0071723 | 236 | |
Rhyme | 0:1db0d0071723 | 237 | int HDC1000::getMode(void) |
Rhyme | 0:1db0d0071723 | 238 | { |
Rhyme | 0:1db0d0071723 | 239 | uint16_t conf ; |
Rhyme | 0:1db0d0071723 | 240 | int mode ; |
Rhyme | 0:1db0d0071723 | 241 | conf = getConfig() ; |
Rhyme | 0:1db0d0071723 | 242 | if (conf & BIT_MODE) { |
Rhyme | 0:1db0d0071723 | 243 | mode = 1 ; |
Rhyme | 0:1db0d0071723 | 244 | } else { |
Rhyme | 0:1db0d0071723 | 245 | mode = 0 ; |
Rhyme | 0:1db0d0071723 | 246 | } |
Rhyme | 0:1db0d0071723 | 247 | return( mode ) ; |
Rhyme | 0:1db0d0071723 | 248 | } |
Rhyme | 0:1db0d0071723 | 249 | |
Rhyme | 0:1db0d0071723 | 250 | void HDC1000::setTres(int tres) |
Rhyme | 0:1db0d0071723 | 251 | { |
Rhyme | 0:1db0d0071723 | 252 | uint16_t conf ; |
Rhyme | 0:1db0d0071723 | 253 | conf = getConfig() ; |
Rhyme | 0:1db0d0071723 | 254 | if (tres) { |
Rhyme | 0:1db0d0071723 | 255 | conf |= BIT_TRES ; |
Rhyme | 0:1db0d0071723 | 256 | } else { |
Rhyme | 0:1db0d0071723 | 257 | conf ^= BIT_TRES ; |
Rhyme | 0:1db0d0071723 | 258 | } |
Rhyme | 0:1db0d0071723 | 259 | } |
Rhyme | 0:1db0d0071723 | 260 | |
Rhyme | 0:1db0d0071723 | 261 | int HDC1000::getTres(void) |
Rhyme | 0:1db0d0071723 | 262 | { |
Rhyme | 0:1db0d0071723 | 263 | uint16_t conf ; |
Rhyme | 0:1db0d0071723 | 264 | int tres ; |
Rhyme | 0:1db0d0071723 | 265 | conf = getConfig() ; |
Rhyme | 0:1db0d0071723 | 266 | if (conf & BIT_TRES) { |
Rhyme | 0:1db0d0071723 | 267 | tres = 1 ; |
Rhyme | 0:1db0d0071723 | 268 | } else { |
Rhyme | 0:1db0d0071723 | 269 | tres = 0 ; |
Rhyme | 0:1db0d0071723 | 270 | } |
Rhyme | 0:1db0d0071723 | 271 | return( tres ) ; |
Rhyme | 0:1db0d0071723 | 272 | } |
Rhyme | 0:1db0d0071723 | 273 | |
Rhyme | 0:1db0d0071723 | 274 | void HDC1000::setHres(int hres) |
Rhyme | 0:1db0d0071723 | 275 | { |
Rhyme | 0:1db0d0071723 | 276 | uint16_t conf ; |
Rhyme | 0:1db0d0071723 | 277 | conf = getConfig() ; |
Rhyme | 0:1db0d0071723 | 278 | conf ^= (BIT_HRES11 | BIT_HRES08) ; |
Rhyme | 0:1db0d0071723 | 279 | conf |= ((hres & 0x03) << 8) ; |
Rhyme | 0:1db0d0071723 | 280 | } |
Rhyme | 0:1db0d0071723 | 281 | |
Rhyme | 0:1db0d0071723 | 282 | int HDC1000::getHres(void) |
Rhyme | 0:1db0d0071723 | 283 | { |
Rhyme | 0:1db0d0071723 | 284 | uint16_t conf ; |
Rhyme | 0:1db0d0071723 | 285 | int hres ; |
Rhyme | 0:1db0d0071723 | 286 | conf = getConfig() ; |
Rhyme | 0:1db0d0071723 | 287 | hres = (conf >> 8)&0x03 ; |
Rhyme | 0:1db0d0071723 | 288 | return( hres ) ; |
Rhyme | 0:1db0d0071723 | 289 | } |
Rhyme | 0:1db0d0071723 | 290 | |
Rhyme | 0:1db0d0071723 | 291 | void HDC1000::getSerialID(uint8_t data[]) |
Rhyme | 0:1db0d0071723 | 292 | { |
Rhyme | 0:1db0d0071723 | 293 | uint8_t udata[2] ; |
Rhyme | 0:1db0d0071723 | 294 | readRegs(REG_ID_FIRST_WORD, &data[0], 2) ; |
Rhyme | 0:1db0d0071723 | 295 | readRegs(REG_ID_SECOND_WORD, &data[2], 2) ; |
Rhyme | 0:1db0d0071723 | 296 | readRegs(REG_ID_LAST_BYTE, udata, 2) ; |
Rhyme | 0:1db0d0071723 | 297 | data[4] = udata[0] ; |
Rhyme | 0:1db0d0071723 | 298 | } |
Rhyme | 0:1db0d0071723 | 299 | |
Rhyme | 0:1db0d0071723 | 300 | uint16_t HDC1000::getManufactureID(void) /* 0x5449 : Texas Instruments */ |
Rhyme | 0:1db0d0071723 | 301 | { |
Rhyme | 0:1db0d0071723 | 302 | uint8_t data[2] ; |
Rhyme | 0:1db0d0071723 | 303 | uint16_t id ; |
Rhyme | 0:1db0d0071723 | 304 | readRegs(REG_MANUFACTURE_ID, data, 2) ; |
Rhyme | 0:1db0d0071723 | 305 | id = (data[0] << 8) | data[1] ; |
Rhyme | 0:1db0d0071723 | 306 | return( id ) ; |
Rhyme | 0:1db0d0071723 | 307 | } |
Rhyme | 0:1db0d0071723 | 308 | |
Rhyme | 0:1db0d0071723 | 309 | uint16_t HDC1000::getDeviceID(void) /* 0x1000 */ |
Rhyme | 0:1db0d0071723 | 310 | { |
Rhyme | 0:1db0d0071723 | 311 | uint8_t data[2] ; |
Rhyme | 0:1db0d0071723 | 312 | uint16_t id ; |
Rhyme | 0:1db0d0071723 | 313 | readRegs(REG_DEVICE_ID, data, 2) ; |
Rhyme | 0:1db0d0071723 | 314 | id = (data[0] << 8) | data[1] ; |
Rhyme | 0:1db0d0071723 | 315 | return( id ) ; |
Rhyme | 0:1db0d0071723 | 316 | } |
Rhyme | 0:1db0d0071723 | 317 | |
Rhyme | 0:1db0d0071723 | 318 | float HDC1000::getTDelay(void) |
Rhyme | 0:1db0d0071723 | 319 | { |
Rhyme | 0:1db0d0071723 | 320 | int tres ; |
Rhyme | 0:1db0d0071723 | 321 | float tdelay ; |
Rhyme | 0:1db0d0071723 | 322 | |
Rhyme | 0:1db0d0071723 | 323 | tres = getTres() ; |
Rhyme | 0:1db0d0071723 | 324 | switch(tres) { |
Rhyme | 0:1db0d0071723 | 325 | case 0: /* 14bit */ |
Rhyme | 0:1db0d0071723 | 326 | tdelay = 6.35 ; |
Rhyme | 0:1db0d0071723 | 327 | break ; |
Rhyme | 0:1db0d0071723 | 328 | case 1: /* 11bit */ |
Rhyme | 0:1db0d0071723 | 329 | tdelay = 3.65 ; |
Rhyme | 0:1db0d0071723 | 330 | break ; |
Rhyme | 0:1db0d0071723 | 331 | default: |
Rhyme | 0:1db0d0071723 | 332 | tdelay = 6.35 ; |
Rhyme | 0:1db0d0071723 | 333 | break ; |
Rhyme | 0:1db0d0071723 | 334 | } |
Rhyme | 0:1db0d0071723 | 335 | return(tdelay) ; |
Rhyme | 0:1db0d0071723 | 336 | } |
Rhyme | 0:1db0d0071723 | 337 | |
Rhyme | 0:1db0d0071723 | 338 | float HDC1000::getHDelay(void) |
Rhyme | 0:1db0d0071723 | 339 | { |
Rhyme | 0:1db0d0071723 | 340 | int hres ; |
Rhyme | 0:1db0d0071723 | 341 | float hdelay ; |
Rhyme | 0:1db0d0071723 | 342 | |
Rhyme | 0:1db0d0071723 | 343 | hres = getHres() ; |
Rhyme | 0:1db0d0071723 | 344 | switch(hres) { |
Rhyme | 0:1db0d0071723 | 345 | case 0: /* 14bit */ |
Rhyme | 0:1db0d0071723 | 346 | hdelay = 6.5 ; |
Rhyme | 0:1db0d0071723 | 347 | break ; |
Rhyme | 0:1db0d0071723 | 348 | case 1: /* 11bit */ |
Rhyme | 0:1db0d0071723 | 349 | hdelay = 3.85 ; |
Rhyme | 0:1db0d0071723 | 350 | break ; |
Rhyme | 0:1db0d0071723 | 351 | case 2: /* 8bit */ |
Rhyme | 0:1db0d0071723 | 352 | hdelay = 2.5 ; |
Rhyme | 0:1db0d0071723 | 353 | break ; |
Rhyme | 0:1db0d0071723 | 354 | default: |
Rhyme | 0:1db0d0071723 | 355 | hdelay = 6.5 ; /* let's use the longest value */ |
Rhyme | 0:1db0d0071723 | 356 | break ; |
Rhyme | 0:1db0d0071723 | 357 | } |
Rhyme | 0:1db0d0071723 | 358 | return(hdelay) ; |
Rhyme | 0:1db0d0071723 | 359 | } |
Rhyme | 0:1db0d0071723 | 360 | |
Rhyme | 0:1db0d0071723 | 361 | float HDC1000::getDelay(void) |
Rhyme | 0:1db0d0071723 | 362 | { |
Rhyme | 0:1db0d0071723 | 363 | float tdelay, hdelay ; |
Rhyme | 0:1db0d0071723 | 364 | tdelay = getTDelay() ; |
Rhyme | 0:1db0d0071723 | 365 | hdelay = getHDelay() ; |
Rhyme | 0:1db0d0071723 | 366 | return( tdelay + hdelay ) ; |
Rhyme | 0:1db0d0071723 | 367 | } |
Rhyme | 0:1db0d0071723 | 368 | |
Rhyme | 0:1db0d0071723 | 369 | void HDC1000::readRegs(int addr, uint8_t * data, int len) { |
Rhyme | 0:1db0d0071723 | 370 | char t[1] = {addr}; |
Rhyme | 0:1db0d0071723 | 371 | m_i2c.write(m_addr, t, 1, true); |
Rhyme | 0:1db0d0071723 | 372 | m_i2c.read(m_addr, (char *)data, len) ; |
Rhyme | 0:1db0d0071723 | 373 | } |
Rhyme | 0:1db0d0071723 | 374 | |
Rhyme | 0:1db0d0071723 | 375 | void HDC1000::writeRegs(uint8_t * data, int len) { |
Rhyme | 0:1db0d0071723 | 376 | m_i2c.write(m_addr, (char *)data, len); |
Rhyme | 0:1db0d0071723 | 377 | } |