diff options
Diffstat (limited to 'src/ds18b20/tm_stm32f4_ds18b20.c')
| -rw-r--r-- | src/ds18b20/tm_stm32f4_ds18b20.c | 394 |
1 files changed, 0 insertions, 394 deletions
diff --git a/src/ds18b20/tm_stm32f4_ds18b20.c b/src/ds18b20/tm_stm32f4_ds18b20.c deleted file mode 100644 index d16e48c..0000000 --- a/src/ds18b20/tm_stm32f4_ds18b20.c +++ /dev/null @@ -1,394 +0,0 @@ -/**
- * |----------------------------------------------------------------------
- * | Copyright (C) Tilen Majerle, 2014
- * |
- * | This program is free software: you can redistribute it and/or modify
- * | it under the terms of the GNU General Public License as published by
- * | the Free Software Foundation, either version 3 of the License, or
- * | any later version.
- * |
- * | This program is distributed in the hope that it will be useful,
- * | but WITHOUT ANY WARRANTY; without even the implied warranty of
- * | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * | GNU General Public License for more details.
- * |
- * | You should have received a copy of the GNU General Public License
- * | along with this program. If not, see <http://www.gnu.org/licenses/>.
- * |----------------------------------------------------------------------
- */
-#include "tm_stm32f4_ds18b20.h"
-
-uint8_t TM_DS18B20_Start(TM_OneWire_t* OneWire, uint8_t *ROM) {
- /* Check if device is DS18B20 */
- if (!TM_DS18B20_Is(ROM)) {
- return 0;
- }
-
- /* Reset line */
- TM_OneWire_Reset(OneWire);
- /* Select ROM number */
- TM_OneWire_SelectWithPointer(OneWire, ROM);
- /* Start temperature conversion */
- TM_OneWire_WriteByte(OneWire, DS18B20_CMD_CONVERTTEMP);
-
- return 1;
-}
-
-void TM_DS18B20_StartAll(TM_OneWire_t* OneWire) {
- /* Reset pulse */
- TM_OneWire_Reset(OneWire);
- /* Skip rom */
- TM_OneWire_WriteByte(OneWire, ONEWIRE_CMD_SKIPROM);
- /* Start conversion on all connected devices */
- TM_OneWire_WriteByte(OneWire, DS18B20_CMD_CONVERTTEMP);
-}
-
-uint8_t TM_DS18B20_Read(TM_OneWire_t* OneWire, uint8_t *ROM, float *destination) {
- uint16_t temperature;
- uint8_t resolution;
- int8_t digit, minus = 0;
- float decimal;
- uint8_t i = 0;
- uint8_t data[9];
- uint8_t crc;
-
- /* Check if device is DS18B20 */
- if (!TM_DS18B20_Is(ROM)) {
- return 0;
- }
-
- /* Check if line is released, if it is, then conversion is complete */
- if (!TM_OneWire_ReadBit(OneWire)) {
- /* Conversion is not finished yet */
- return 0;
- }
-
- /* Reset line */
- TM_OneWire_Reset(OneWire);
- /* Select ROM number */
- TM_OneWire_SelectWithPointer(OneWire, ROM);
- /* Read scratchpad command by onewire protocol */
- TM_OneWire_WriteByte(OneWire, ONEWIRE_CMD_RSCRATCHPAD);
-
- /* Get data */
- for (i = 0; i < 9; i++) {
- /* Read byte by byte */
- data[i] = TM_OneWire_ReadByte(OneWire);
- }
-
- /* Calculate CRC */
- crc = TM_OneWire_CRC8(data, 8);
-
- /* Check if CRC is ok */
- if (crc != data[8]) {
- /* CRC invalid */
- return 0;
- }
-
- /* First two bytes of scratchpad are temperature values */
- temperature = data[0] | (data[1] << 8);
-
- /* Reset line */
- TM_OneWire_Reset(OneWire);
-
- /* Check if temperature is negative */
- if (temperature & 0x8000) {
- /* Two's complement, temperature is negative */
- temperature = ~temperature + 1;
- minus = 1;
- }
-
-
- /* Get sensor resolution */
- resolution = ((data[4] & 0x60) >> 5) + 9;
-
-
- /* Store temperature integer digits and decimal digits */
- digit = temperature >> 4;
- digit |= ((temperature >> 8) & 0x7) << 4;
-
- /* Store decimal digits */
- switch (resolution) {
- case 9: {
- decimal = (temperature >> 3) & 0x01;
- decimal *= (float)DS18B20_DECIMAL_STEPS_9BIT;
- } break;
- case 10: {
- decimal = (temperature >> 2) & 0x03;
- decimal *= (float)DS18B20_DECIMAL_STEPS_10BIT;
- } break;
- case 11: {
- decimal = (temperature >> 1) & 0x07;
- decimal *= (float)DS18B20_DECIMAL_STEPS_11BIT;
- } break;
- case 12: {
- decimal = temperature & 0x0F;
- decimal *= (float)DS18B20_DECIMAL_STEPS_12BIT;
- } break;
- default: {
- decimal = 0xFF;
- digit = 0;
- }
- }
-
- /* Check for negative part */
- decimal = digit + decimal;
- if (minus) {
- decimal = 0 - decimal;
- }
-
- /* Set to pointer */
- *destination = decimal;
-
- /* Return 1, temperature valid */
- return 1;
-}
-
-uint8_t TM_DS18B20_GetResolution(TM_OneWire_t* OneWire, uint8_t *ROM) {
- uint8_t conf;
-
- if (!TM_DS18B20_Is(ROM)) {
- return 0;
- }
-
- /* Reset line */
- TM_OneWire_Reset(OneWire);
- /* Select ROM number */
- TM_OneWire_SelectWithPointer(OneWire, ROM);
- /* Read scratchpad command by onewire protocol */
- TM_OneWire_WriteByte(OneWire, ONEWIRE_CMD_RSCRATCHPAD);
-
- /* Ignore first 4 bytes */
- TM_OneWire_ReadByte(OneWire);
- TM_OneWire_ReadByte(OneWire);
- TM_OneWire_ReadByte(OneWire);
- TM_OneWire_ReadByte(OneWire);
-
- /* 5th byte of scratchpad is configuration register */
- conf = TM_OneWire_ReadByte(OneWire);
-
- /* Return 9 - 12 value according to number of bits */
- return ((conf & 0x60) >> 5) + 9;
-}
-
-uint8_t TM_DS18B20_SetResolution(TM_OneWire_t* OneWire, uint8_t *ROM, TM_DS18B20_Resolution_t resolution) {
- uint8_t th, tl, conf;
- if (!TM_DS18B20_Is(ROM)) {
- return 0;
- }
-
- /* Reset line */
- TM_OneWire_Reset(OneWire);
- /* Select ROM number */
- TM_OneWire_SelectWithPointer(OneWire, ROM);
- /* Read scratchpad command by onewire protocol */
- TM_OneWire_WriteByte(OneWire, ONEWIRE_CMD_RSCRATCHPAD);
-
- /* Ignore first 2 bytes */
- TM_OneWire_ReadByte(OneWire);
- TM_OneWire_ReadByte(OneWire);
-
- th = TM_OneWire_ReadByte(OneWire);
- tl = TM_OneWire_ReadByte(OneWire);
- conf = TM_OneWire_ReadByte(OneWire);
-
- if (resolution == TM_DS18B20_Resolution_9bits) {
- conf &= ~(1 << DS18B20_RESOLUTION_R1);
- conf &= ~(1 << DS18B20_RESOLUTION_R0);
- } else if (resolution == TM_DS18B20_Resolution_10bits) {
- conf &= ~(1 << DS18B20_RESOLUTION_R1);
- conf |= 1 << DS18B20_RESOLUTION_R0;
- } else if (resolution == TM_DS18B20_Resolution_11bits) {
- conf |= 1 << DS18B20_RESOLUTION_R1;
- conf &= ~(1 << DS18B20_RESOLUTION_R0);
- } else if (resolution == TM_DS18B20_Resolution_12bits) {
- conf |= 1 << DS18B20_RESOLUTION_R1;
- conf |= 1 << DS18B20_RESOLUTION_R0;
- }
-
- /* Reset line */
- TM_OneWire_Reset(OneWire);
- /* Select ROM number */
- TM_OneWire_SelectWithPointer(OneWire, ROM);
- /* Write scratchpad command by onewire protocol, only th, tl and conf register can be written */
- TM_OneWire_WriteByte(OneWire, ONEWIRE_CMD_WSCRATCHPAD);
-
- /* Write bytes */
- TM_OneWire_WriteByte(OneWire, th);
- TM_OneWire_WriteByte(OneWire, tl);
- TM_OneWire_WriteByte(OneWire, conf);
-
- /* Reset line */
- TM_OneWire_Reset(OneWire);
- /* Select ROM number */
- TM_OneWire_SelectWithPointer(OneWire, ROM);
- /* Copy scratchpad to EEPROM of DS18B20 */
- TM_OneWire_WriteByte(OneWire, ONEWIRE_CMD_CPYSCRATCHPAD);
-
- return 1;
-}
-
-uint8_t TM_DS18B20_Is(uint8_t *ROM) {
- /* Checks if first byte is equal to DS18B20's family code */
- if (*ROM == DS18B20_FAMILY_CODE) {
- return 1;
- }
- return 0;
-}
-
-uint8_t TM_DS18B20_SetAlarmLowTemperature(TM_OneWire_t* OneWire, uint8_t *ROM, int8_t temp) {
- uint8_t tl, th, conf;
- if (!TM_DS18B20_Is(ROM)) {
- return 0;
- }
- if (temp > 125) {
- temp = 125;
- }
- if (temp < -55) {
- temp = -55;
- }
- /* Reset line */
- TM_OneWire_Reset(OneWire);
- /* Select ROM number */
- TM_OneWire_SelectWithPointer(OneWire, ROM);
- /* Read scratchpad command by onewire protocol */
- TM_OneWire_WriteByte(OneWire, ONEWIRE_CMD_RSCRATCHPAD);
-
- /* Ignore first 2 bytes */
- TM_OneWire_ReadByte(OneWire);
- TM_OneWire_ReadByte(OneWire);
-
- th = TM_OneWire_ReadByte(OneWire);
- tl = TM_OneWire_ReadByte(OneWire);
- conf = TM_OneWire_ReadByte(OneWire);
-
- tl = (uint8_t)temp;
-
- /* Reset line */
- TM_OneWire_Reset(OneWire);
- /* Select ROM number */
- TM_OneWire_SelectWithPointer(OneWire, ROM);
- /* Write scratchpad command by onewire protocol, only th, tl and conf register can be written */
- TM_OneWire_WriteByte(OneWire, ONEWIRE_CMD_WSCRATCHPAD);
-
- /* Write bytes */
- TM_OneWire_WriteByte(OneWire, th);
- TM_OneWire_WriteByte(OneWire, tl);
- TM_OneWire_WriteByte(OneWire, conf);
-
- /* Reset line */
- TM_OneWire_Reset(OneWire);
- /* Select ROM number */
- TM_OneWire_SelectWithPointer(OneWire, ROM);
- /* Copy scratchpad to EEPROM of DS18B20 */
- TM_OneWire_WriteByte(OneWire, ONEWIRE_CMD_CPYSCRATCHPAD);
-
- return 1;
-}
-
-uint8_t TM_DS18B20_SetAlarmHighTemperature(TM_OneWire_t* OneWire, uint8_t *ROM, int8_t temp) {
- uint8_t tl, th, conf;
- if (!TM_DS18B20_Is(ROM)) {
- return 0;
- }
- if (temp > 125) {
- temp = 125;
- }
- if (temp < -55) {
- temp = -55;
- }
- /* Reset line */
- TM_OneWire_Reset(OneWire);
- /* Select ROM number */
- TM_OneWire_SelectWithPointer(OneWire, ROM);
- /* Read scratchpad command by onewire protocol */
- TM_OneWire_WriteByte(OneWire, ONEWIRE_CMD_RSCRATCHPAD);
-
- /* Ignore first 2 bytes */
- TM_OneWire_ReadByte(OneWire);
- TM_OneWire_ReadByte(OneWire);
-
- th = TM_OneWire_ReadByte(OneWire);
- tl = TM_OneWire_ReadByte(OneWire);
- conf = TM_OneWire_ReadByte(OneWire);
-
- th = (uint8_t)temp;
-
- /* Reset line */
- TM_OneWire_Reset(OneWire);
- /* Select ROM number */
- TM_OneWire_SelectWithPointer(OneWire, ROM);
- /* Write scratchpad command by onewire protocol, only th, tl and conf register can be written */
- TM_OneWire_WriteByte(OneWire, ONEWIRE_CMD_WSCRATCHPAD);
-
- /* Write bytes */
- TM_OneWire_WriteByte(OneWire, th);
- TM_OneWire_WriteByte(OneWire, tl);
- TM_OneWire_WriteByte(OneWire, conf);
-
- /* Reset line */
- TM_OneWire_Reset(OneWire);
- /* Select ROM number */
- TM_OneWire_SelectWithPointer(OneWire, ROM);
- /* Copy scratchpad to EEPROM of DS18B20 */
- TM_OneWire_WriteByte(OneWire, ONEWIRE_CMD_CPYSCRATCHPAD);
-
- return 1;
-}
-
-uint8_t TM_DS18B20_DisableAlarmTemperature(TM_OneWire_t* OneWire, uint8_t *ROM) {
- uint8_t tl, th, conf;
- if (!TM_DS18B20_Is(ROM)) {
- return 0;
- }
- /* Reset line */
- TM_OneWire_Reset(OneWire);
- /* Select ROM number */
- TM_OneWire_SelectWithPointer(OneWire, ROM);
- /* Read scratchpad command by onewire protocol */
- TM_OneWire_WriteByte(OneWire, ONEWIRE_CMD_RSCRATCHPAD);
-
- /* Ignore first 2 bytes */
- TM_OneWire_ReadByte(OneWire);
- TM_OneWire_ReadByte(OneWire);
-
- th = TM_OneWire_ReadByte(OneWire);
- tl = TM_OneWire_ReadByte(OneWire);
- conf = TM_OneWire_ReadByte(OneWire);
-
- th = 125;
- tl = (uint8_t)-55;
-
- /* Reset line */
- TM_OneWire_Reset(OneWire);
- /* Select ROM number */
- TM_OneWire_SelectWithPointer(OneWire, ROM);
- /* Write scratchpad command by onewire protocol, only th, tl and conf register can be written */
- TM_OneWire_WriteByte(OneWire, ONEWIRE_CMD_WSCRATCHPAD);
-
- /* Write bytes */
- TM_OneWire_WriteByte(OneWire, th);
- TM_OneWire_WriteByte(OneWire, tl);
- TM_OneWire_WriteByte(OneWire, conf);
-
- /* Reset line */
- TM_OneWire_Reset(OneWire);
- /* Select ROM number */
- TM_OneWire_SelectWithPointer(OneWire, ROM);
- /* Copy scratchpad to EEPROM of DS18B20 */
- TM_OneWire_WriteByte(OneWire, ONEWIRE_CMD_CPYSCRATCHPAD);
-
- return 1;
-}
-
-uint8_t TM_DS18B20_AlarmSearch(TM_OneWire_t* OneWire) {
- /* Start alarm search */
- return TM_OneWire_Search(OneWire, DS18B20_CMD_ALARMSEARCH);
-}
-
-uint8_t TM_DS18B20_AllDone(TM_OneWire_t* OneWire) {
- /* If read bit is low, then device is not finished yet with calculation temperature */
- return TM_OneWire_ReadBit(OneWire);
-}
-
-
|