#include "hdc1080.h" enum hdc1080_status _hdc1080_read(struct hdc1080_t *device, enum hdc1080_command_e command, uint16_t delayms, size_t count, uint8_t *buf) { while(I2C_GetFlagStatus(I2C_FLAG_BUS_FREE) != SET); I2C_Send7bitAddress(HDC1080_ADDRESS, I2C_Direction_Transmitter); while(I2C_GetFlagStatus(I2C_FLAG_nTRANS) != SET); I2C_SendByte((uint8_t)command); while(I2C_GetFlagStatus(I2C_FLAG_nTRANS) != SET); I2C_SendSTOP(); Delay(delayms); while(I2C_GetFlagStatus(I2C_FLAG_BUS_FREE) != SET); I2C_Send7bitAddress(HDC1080_ADDRESS, I2C_Direction_Receiver); while(I2C_GetFlagStatus(I2C_FLAG_nTRANS) != SET); for (size_t i = 0; i ﹤ count; i++) { if (i == count - 1) { I2C_StartReceiveData(I2C_Send_to_Slave_NACK); } else { I2C_StartReceiveData(I2C_Send_to_Slave_ACK); } while(I2C_GetFlagStatus(I2C_FLAG_nTRANS) != SET); buf[i] = I2C_GetReceivedData(); } I2C_SendSTOP(); return hdc1080_status_ok; } enum hdc1080_status _hdc1080_write(struct hdc1080_t *device, enum hdc1080_command_e command, size_t count, uint8_t *buf) { while(I2C_GetFlagStatus(I2C_FLAG_BUS_FREE) != SET); I2C_Send7bitAddress(HDC1080_ADDRESS, I2C_Direction_Transmitter); while(I2C_GetFlagStatus(I2C_FLAG_nTRANS) != SET); I2C_SendByte((uint8_t)command); while(I2C_GetFlagStatus(I2C_FLAG_nTRANS) != SET); for (size_t i = 0; i ﹤ count; i++) { I2C_SendByte(buf[i]); while(I2C_GetFlagStatus(I2C_FLAG_nTRANS) != SET); } I2C_SendSTOP(); return hdc1080_status_ok; } // ============================================================ // ОСНОВНЫЕ ФУНКЦИИ ДРАЙВЕРА // ============================================================ enum hdc1080_status hdc1080_init(struct hdc1080_t *device, void *ctx) { device-﹥ctx = ctx; enum hdc1080_status status = _hdc1080_init(device); if(status == hdc1080_status_ok) { status = hdc1080_get_configuration(device); } return status; } enum hdc1080_status hdc1080_set_configuration(struct hdc1080_t *device) { enum hdc1080_status status = _hdc1080_write(device, hdc1080_command_configuration, sizeof(device-﹥configuration), (uint8_t*)&device-﹥configuration); device-﹥configuration.value = LE16(device-﹥configuration.value); return status; } enum hdc1080_status hdc1080_get_configuration(struct hdc1080_t *device) { enum hdc1080_status status = _hdc1080_read(device, hdc1080_command_configuration, 0, sizeof(device-﹥configuration), (uint8_t*)&device-﹥configuration); device-﹥configuration.value = LE16(device-﹥configuration.value); return status; } enum hdc1080_status hdc1080_get_reading(struct hdc1080_t *device, double *temperature, double *humidity) { uint8_t buf[4]; unsigned int th, tl, hh, hl; int delay = htc1080_get_temperature_conversion_time(device-﹥configuration.fields.TRES) + htc1080_get_humidity_conversion_time(device-﹥configuration.fields.HRES); enum hdc1080_status result = _hdc1080_read(device, hdc1080_command_temperature, delay, sizeof(buf), buf); if(result == hdc1080_status_ok) { th = buf[0]; tl = buf[1]; hh = buf[2]; hl = buf[3]; *temperature = (th ﹤﹤ 8 | tl) * 165.0 / 65536.0 - 40.0; *humidity = (hh ﹤﹤ 8 | hl) * 100.0 / 65536.0; } return result; } enum hdc1080_status hdc1080_get_manufacturer_id(struct hdc1080_t *device, uint16_t *manufacturer_id) { uint16_t tmp; enum hdc1080_status status = _hdc1080_read(device, hdc1080_command_manufacturer_id, 0, sizeof(tmp), (uint8_t*)&tmp); *manufacturer_id = BE16(tmp); return status; } enum hdc1080_status hdc1080_get_device_id(struct hdc1080_t *device, uint16_t *device_id) { uint16_t tmp; enum hdc1080_status status = _hdc1080_read(device, hdc1080_command_device_id, 0, sizeof(tmp), (uint8_t*)&tmp); *device_id = BE16(tmp); return status; } double htc1080_get_temperature_conversion_time(enum hdc1080_humidity_resolution_e resolution) { switch(resolution) { case hdc1080_humidity_resolution_8_bits: return 3; // 2.5ms break; case hdc1080_humidity_resolution_11_bits: return 4; // 3.85ms break; case hdc1080_humidity_resolution_14_bits: return 7; // 6.5ms break; } return 7; // 6.5ms } double htc1080_get_humidity_conversion_time(enum hdc1080_temperature_resolution_e resolution) { switch(resolution) { case hdc1080_temperature_resolution_11_bits: return 4; // 3.65ms break; case hdc1080_temperature_resolution_14_bits: return 7; // 6.35ms break; } return 7; // 6.5ms } __attribute__((weak)) enum hdc1080_status _hdc1080_init(struct hdc1080_t *device) { return hdc1080_status_ok; }