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The BMP390 is a very small, low-power and low-noise 24-bit absolute barometric pressure sensor. The digital, high-performance sensor is ideally suited for a wide range of altitude tracking applications. This new BMP390 pressure sensor offers outstanding design flexibility, providing a single package solution that customers can easily integrate into a multitude of existing and upcoming devices such as smartphones, GPS modules, wearables, hearables and drones.
LibDriver BMP390 is a full function driver of BMP390 launched by LibDriver.It provides continuous reading of pressure and temperature, single reading of pressure and temperature, interrupt reading, FIFO acquisition and other functions. LibDriver is MISRA compliant.
/src includes LibDriver BMP390 source files.
/interface includes LibDriver BMP390 IIC, SPI platform independent template。
/test includes LibDriver BMP390 driver test code and this code can test the chip necessary function simply。
/example includes LibDriver BMP390 sample code.
/doc includes LibDriver BMP390 offline document.
/datasheet includes BMP390 datasheet。
/project includes the common Linux and MCU development board sample code. All projects use the shell script to debug the driver and the detail instruction can be found in each project's README.md.
Reference /interface IIC, SPI platform independent template and finish your platform IIC, SPI driver.
Add /src, /interface and /example to your project.
uint8_t res;
uint8_t i;
float temperature_c;
float pressure_pa;
res = bmp390_basic_init(BMP390_INTERFACE_IIC, BMP390_ADDRESS_ADO_LOW);
if (res != 0)
{
return 1;
}
...
for (i = 0; i < 3; i++)
{
bmp390_interface_delay_ms(1000);
res = bmp390_basic_read((float *)&temperature_c, (float *)&pressure_pa);
if (res != 0)
{
(void)bmp390_basic_deinit();
return 1;
}
bmp390_interface_debug_print("bmp390: temperature is %0.2fC.\n", temperature_c);
bmp390_interface_debug_print("bmp390: pressure is %0.2fPa.\n", pressure_pa);
...
}
...
(void)bmp390_basic_deinit();
return 0;uint8_t res;
uint8_t i;
float temperature_c;
float pressure_pa;
res = bmp390_shot_init(BMP390_INTERFACE_IIC, BMP390_ADDRESS_ADO_LOW);
if (res != 0)
{
return 1;
}
...
for (i = 0; i < 3; i++)
{
bmp390_interface_delay_ms(1000);
res = bmp390_shot_read((float *)&temperature_c, (float *)&pressure_pa);
if (res != 0)
{
(void)bmp390_shot_deinit();
return 1;
}
bmp390_interface_debug_print("bmp390: temperature is %0.2fC.\n", temperature_c);
bmp390_interface_debug_print("bmp390: pressure is %0.2fPa.\n", pressure_pa);
...
}
...
(void)bmp390_shot_deinit();
return 0;uint8_t res;
uint16_t i, timeout;
uint8_t gs_data_ready_flag;
float gs_temperature_c;
float gs_pressure_pa;
void bmp390_interrupt_receive_callback(uint8_t type)
{
switch (type)
{
case BMP390_INTERRUPT_STATUS_FIFO_WATERMARK :
{
break;
}
case BMP390_INTERRUPT_STATUS_FIFO_FULL :
{
break;
}
case BMP390_INTERRUPT_STATUS_DATA_READY :
{
/* read temperature pressure */
if (bmp390_interrupt_read((float *)&gs_temperature_c, (float *)&gs_pressure_pa) != 0)
{
bmp390_interface_debug_print("bmp390: read temperature and pressure failed.\n");
return;
}
gs_data_ready_flag = 1;
break;
}
default :
{
break;
}
}
}
res = gpio_interrupt_init();
if (res != 0)
{
return 1;
}
res = bmp390_interrupt_init(BMP390_INTERFACE_IIC, BMP390_ADDRESS_ADO_LOW, bmp390_interrupt_receive_callback);
if (res != 0)
{
(void)gpio_interrupt_deinit();
return 1;
}
...
gs_data_ready_flag = 0;
timeout = 5000;
for (i = 0; i < 3; i++)
{
while (timeout != 0)
{
bmp390_interface_delay_ms(100);
timeout--;
if (gs_data_ready_flag != 0)
{
break;
}
if (timeout == 0)
{
(void)gpio_interrupt_deinit();
(void)bmp390_interrupt_deinit();
return 1;
}
}
gs_data_ready_flag = 0;
timeout = 5000;
bmp390_interface_debug_print("bmp390: temperature is %0.2fC.\n", gs_temperature_c);
bmp390_interface_debug_print("bmp390: pressure is %0.2fPa.\n", gs_pressure_pa);
...
}
...
(void)gpio_interrupt_deinit();
(void)bmp390_interrupt_deinit();
return 0;uint8_t gs_fifo_full_flag;
uint8_t gs_fifo_watermark_flag;
uint16_t i, timeout;
uint8_t gs_buf[512];
bmp390_frame_t gs_frame[256];
void bmp390_fifo_receive_callback(uint8_t type)
{
switch (type)
{
case BMP390_INTERRUPT_STATUS_FIFO_WATERMARK :
{
uint8_t res;
uint16_t len;
uint16_t i, frame_len;
len = 512;
frame_len = 256;
res = bmp390_fifo_read(gs_buf, len, (bmp390_frame_t *)gs_frame, (uint16_t *)&frame_len);
if (res != 0)
{
bmp390_interface_debug_print("bmp390: fifo read failed.\n");
return;
}
for (i = 0; i < frame_len; i++)
{
if (gs_frame[i].type == BMP390_FRAME_TYPE_TEMPERATURE)
{
bmp390_interface_debug_print("bmp390: fifo %d/%d.\n", i+1, frame_len);
bmp390_interface_debug_print("bmp390: temperature is %0.2fC.\n", gs_frame[i].data);
}
else if (gs_frame[i].type == BMP390_FRAME_TYPE_PRESSURE)
{
bmp390_interface_debug_print("bmp390: fifo %d/%d.\n", i+1, frame_len);
bmp390_interface_debug_print("bmp390: pressure is %0.2fPa.\n", gs_frame[i].data);
}
else if (gs_frame[i].type == BMP390_FRAME_TYPE_SENSORTIME)
{
bmp390_interface_debug_print("bmp390: fifo %d/%d.\n", i+1, frame_len);
bmp390_interface_debug_print("bmp390: sensortime is %d.\n", gs_frame[i].raw);
}
else
{
bmp390_interface_debug_print("bmp390: fifo %d/%d.\n", i+1, frame_len);
bmp390_interface_debug_print("bmp390: unknow type.\n");
}
}
gs_fifo_watermark_flag = 1;
break;
}
case BMP390_INTERRUPT_STATUS_FIFO_FULL :
{
uint8_t res;
uint16_t len;
uint16_t i, frame_len;
len = 512;
frame_len = 256;
res = bmp390_fifo_read(gs_buf, len, (bmp390_frame_t *)gs_frame, (uint16_t *)&frame_len);
if (res != 0)
{
bmp390_interface_debug_print("bmp390: fifo read failed.\n");
return;
}
for (i = 0; i < frame_len; i++)
{
if (gs_frame[i].type == BMP390_FRAME_TYPE_TEMPERATURE)
{
bmp390_interface_debug_print("bmp390: fifo %d/%d.\n", i+1, frame_len);
bmp390_interface_debug_print("bmp390: temperature is %0.2fC.\n", gs_frame[i].data);
}
else if (gs_frame[i].type == BMP390_FRAME_TYPE_PRESSURE)
{
bmp390_interface_debug_print("bmp390: fifo %d/%d.\n", i+1, frame_len);
bmp390_interface_debug_print("bmp390: pressure is %0.2fPa.\n", gs_frame[i].data);
}
else if (gs_frame[i].type == BMP390_FRAME_TYPE_SENSORTIME)
{
bmp390_interface_debug_print("bmp390: fifo %d/%d.\n", i+1, frame_len);
bmp390_interface_debug_print("bmp390: sensortime is %d.\n", gs_frame[i].raw);
}
else
{
bmp390_interface_debug_print("bmp390: fifo %d/%d.\n", i+1, frame_len);
bmp390_interface_debug_print("bmp390: unknow type.\n");
}
}
gs_fifo_full_flag = 1;
break;
}
case BMP390_INTERRUPT_STATUS_DATA_READY :
{
break;
}
default :
{
break;
}
}
}
res = gpio_interrupt_init();
if (res != 0)
{
return 1;
}
res = bmp390_fifo_init(BMP390_INTERFACE_IIC, BMP390_ADDRESS_ADO_LOW, bmp390_fifo_receive_callback);
if (res != 0)
{
(void)gpio_interrupt_deinit();
return 1;
}
...
gs_fifo_watermark_flag = 0;
gs_fifo_full_flag = 0;
timeout = 5000;
for (i = 0; i < 3; i++)
{
while (timeout != 0)
{
bmp390_interface_delay_ms(100);
timeout--;
if ((gs_fifo_watermark_flag != 0) || (gs_fifo_full_flag != 0))
{
break;
}
if (timeout == 0)
{
(void)gpio_interrupt_deinit();
(void)bmp390_fifo_deinit();
return 1;
}
}
gs_fifo_watermark_flag = 0;
gs_fifo_full_flag = 0;
timeout = 5000;
...
}
(void)gpio_interrupt_deinit();
(void)bmp390_fifo_deinit();
...
return 0;Online documents: https://www.libdriver.com/docs/bmp390/index.html
Offline documents: /doc/html/index.html
Please sent an e-mail to lishifenging@outlook.com
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