Basic functions is OK. Lack interrupts function.
AK09912.cpp@4:413b8ef9aed5, 2017-03-23 (annotated)
- Committer:
- bcc6
- Date:
- Thu Mar 23 08:54:15 2017 +0000
- Revision:
- 4:413b8ef9aed5
- Parent:
- 1:4eefcf1d7351
Merge from branch
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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bcc6 | 1:4eefcf1d7351 | 1 | /* Copyright (c) 2016 MtM Technology Corporation, MIT License |
bcc6 | 1:4eefcf1d7351 | 2 | * |
bcc6 | 1:4eefcf1d7351 | 3 | * Permission is hereby granted, free of charge, to any person obtaining a copy of this software |
bcc6 | 1:4eefcf1d7351 | 4 | * and associated documentation files (the "Software"), to deal in the Software without restriction, |
bcc6 | 1:4eefcf1d7351 | 5 | * including without limitation the rights to use, copy, modify, merge, publish, distribute, |
bcc6 | 1:4eefcf1d7351 | 6 | * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is |
bcc6 | 1:4eefcf1d7351 | 7 | * furnished to do so, subject to the following conditions: |
bcc6 | 1:4eefcf1d7351 | 8 | * |
bcc6 | 1:4eefcf1d7351 | 9 | * The above copyright notice and this permission notice shall be included in all copies or |
bcc6 | 1:4eefcf1d7351 | 10 | * substantial portions of the Software. |
bcc6 | 1:4eefcf1d7351 | 11 | * |
bcc6 | 1:4eefcf1d7351 | 12 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING |
bcc6 | 1:4eefcf1d7351 | 13 | * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
bcc6 | 1:4eefcf1d7351 | 14 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, |
bcc6 | 1:4eefcf1d7351 | 15 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
bcc6 | 1:4eefcf1d7351 | 16 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
bcc6 | 1:4eefcf1d7351 | 17 | */ |
bcc6 | 0:4f87d5af61b1 | 18 | #include "AK09912.h" |
bcc6 | 0:4f87d5af61b1 | 19 | |
bcc6 | 0:4f87d5af61b1 | 20 | |
bcc6 | 0:4f87d5af61b1 | 21 | AK09912::AK09912(I2C &i2c, PinName int1) : _i2c(i2c), _int1(int1) { |
bcc6 | 0:4f87d5af61b1 | 22 | |
bcc6 | 0:4f87d5af61b1 | 23 | } |
bcc6 | 0:4f87d5af61b1 | 24 | |
bcc6 | 0:4f87d5af61b1 | 25 | void AK09912::ConfigDevice() { |
bcc6 | 0:4f87d5af61b1 | 26 | /* Soft reset */ |
bcc6 | 0:4f87d5af61b1 | 27 | RegWrite(0x32, 0x01); |
bcc6 | 0:4f87d5af61b1 | 28 | |
bcc6 | 0:4f87d5af61b1 | 29 | /* Get sensitivity adjustment values */ |
bcc6 | 0:4f87d5af61b1 | 30 | RegWrite(0x31, 0x1F); // MODE(Fuse ROM ACCESS) |
bcc6 | 0:4f87d5af61b1 | 31 | RegRead(0x60, (char *)_asa, 3); // ASAX, ASAY, ASAZ |
bcc6 | 0:4f87d5af61b1 | 32 | RegWrite(0x31, 0x00); // MODE(Power down) |
bcc6 | 0:4f87d5af61b1 | 33 | |
bcc6 | 0:4f87d5af61b1 | 34 | /* Enable both temperature measurement and noise suppression filter */ |
bcc6 | 0:4f87d5af61b1 | 35 | RegWrite(0x30, 0xE0); // TEM(Enable), NSF(High) |
bcc6 | 0:4f87d5af61b1 | 36 | |
bcc6 | 0:4f87d5af61b1 | 37 | /* Mode */ |
bcc6 | 0:4f87d5af61b1 | 38 | RegWrite(0x31, 0x02); // MODE(ContMode1) |
bcc6 | 0:4f87d5af61b1 | 39 | } |
bcc6 | 0:4f87d5af61b1 | 40 | |
bcc6 | 0:4f87d5af61b1 | 41 | void AK09912::GetDeviceID(uint8_t *id) { |
bcc6 | 0:4f87d5af61b1 | 42 | RegRead(0x01, (char *)id, 1); |
bcc6 | 0:4f87d5af61b1 | 43 | } |
bcc6 | 0:4f87d5af61b1 | 44 | |
bcc6 | 0:4f87d5af61b1 | 45 | void AK09912::GetData(Data *data){ |
bcc6 | 0:4f87d5af61b1 | 46 | char status; |
bcc6 | 0:4f87d5af61b1 | 47 | char buf[10]; |
bcc6 | 0:4f87d5af61b1 | 48 | |
bcc6 | 0:4f87d5af61b1 | 49 | /* Read data */ |
bcc6 | 0:4f87d5af61b1 | 50 | RegRead(0x10, &status, 1); |
bcc6 | 0:4f87d5af61b1 | 51 | RegRead(0x11, buf, 7); |
bcc6 | 0:4f87d5af61b1 | 52 | RegRead(0x18, &status, 1); // Dummy read |
bcc6 | 0:4f87d5af61b1 | 53 | |
bcc6 | 0:4f87d5af61b1 | 54 | /* Format data */ |
bcc6 | 0:4f87d5af61b1 | 55 | int16_t x_adc = (((int16_t)buf[1]) << 8) | buf[0]; |
bcc6 | 0:4f87d5af61b1 | 56 | int16_t y_adc = (((int16_t)buf[3]) << 8) | buf[2]; |
bcc6 | 0:4f87d5af61b1 | 57 | int16_t z_adc = (((int16_t)buf[5]) << 8) | buf[4]; |
bcc6 | 0:4f87d5af61b1 | 58 | uint8_t t_adc = buf[6]; |
bcc6 | 0:4f87d5af61b1 | 59 | |
bcc6 | 0:4f87d5af61b1 | 60 | /* Convert data */ |
bcc6 | 0:4f87d5af61b1 | 61 | data->x = ConvertAdcToMagnetic(x_adc, _asa[0]); |
bcc6 | 0:4f87d5af61b1 | 62 | data->y = ConvertAdcToMagnetic(y_adc, _asa[1]); |
bcc6 | 0:4f87d5af61b1 | 63 | data->z = ConvertAdcToMagnetic(z_adc, _asa[2]); |
bcc6 | 0:4f87d5af61b1 | 64 | data->t = ConvertAdcToTemperature(t_adc); |
bcc6 | 0:4f87d5af61b1 | 65 | } |
bcc6 | 0:4f87d5af61b1 | 66 | |
bcc6 | 0:4f87d5af61b1 | 67 | float AK09912::ConvertAdcToMagnetic(int16_t adc, uint8_t asa) { |
bcc6 | 0:4f87d5af61b1 | 68 | float magnetic_flux_density = (float)adc * 0.15f; // Original |
bcc6 | 0:4f87d5af61b1 | 69 | return magnetic_flux_density * (((float)asa - 128) * 0.5f / 128 + 1); // Adjustment |
bcc6 | 0:4f87d5af61b1 | 70 | } |
bcc6 | 0:4f87d5af61b1 | 71 | |
bcc6 | 0:4f87d5af61b1 | 72 | float AK09912::ConvertAdcToTemperature(uint8_t adc) { |
bcc6 | 0:4f87d5af61b1 | 73 | return (120.0f - (float)adc) / 1.6f + 35.0f; |
bcc6 | 0:4f87d5af61b1 | 74 | } |
bcc6 | 0:4f87d5af61b1 | 75 | |
bcc6 | 0:4f87d5af61b1 | 76 | void AK09912::RegWrite(char reg, char val) { |
bcc6 | 0:4f87d5af61b1 | 77 | char data[2]; |
bcc6 | 0:4f87d5af61b1 | 78 | data[0] = reg; |
bcc6 | 0:4f87d5af61b1 | 79 | data[1] = val; |
bcc6 | 0:4f87d5af61b1 | 80 | _i2c.write(AK09912_SLAVE_ADDR, data, 2, 0); |
bcc6 | 0:4f87d5af61b1 | 81 | } |
bcc6 | 0:4f87d5af61b1 | 82 | |
bcc6 | 0:4f87d5af61b1 | 83 | void AK09912::RegRead(char reg, char *val, int len) { |
bcc6 | 0:4f87d5af61b1 | 84 | _i2c.write(AK09912_SLAVE_ADDR, ®, 1, 0); |
bcc6 | 0:4f87d5af61b1 | 85 | _i2c.read (AK09912_SLAVE_ADDR, val, len); |
bcc6 | 0:4f87d5af61b1 | 86 | } |
bcc6 | 0:4f87d5af61b1 | 87 | |
bcc6 | 0:4f87d5af61b1 | 88 | void AK09912::RegReadModifyWrite(char reg, char clr_mask, char set_mask) { |
bcc6 | 0:4f87d5af61b1 | 89 | char val; |
bcc6 | 0:4f87d5af61b1 | 90 | RegRead (reg, &val, 1); // Read |
bcc6 | 0:4f87d5af61b1 | 91 | val = (val & ~clr_mask) | set_mask; // Modify |
bcc6 | 0:4f87d5af61b1 | 92 | RegWrite(reg, val); // Write |
bcc6 | 0:4f87d5af61b1 | 93 | } |