163 lines
4.0 KiB
C
163 lines
4.0 KiB
C
/*
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* Copyright (c) 2006-2023, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2019-07-22 Magicoe The first version for LPC55S6x
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*/
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#include <rthw.h>
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#include <rtdevice.h>
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#include <rtthread.h>
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#include "rtconfig.h"
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#include "drv_mma8562.h"
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enum _mma8562_i2c_constants
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{
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kMMA8562_ADDR = 0x1D,
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kMMA8562_ADDR_With_SAO_Set = kMMA8562_ADDR | 1
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};
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#define MMA8562_I2CBUS_NAME "i2c4"
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static struct rt_i2c_bus_device *mma8562_i2c_bus;
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////////////////////////////////////////////////////////////////////////////////
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// Code
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////////////////////////////////////////////////////////////////////////////////
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rt_err_t mma8562_read_reg(rt_uint8_t reg, rt_uint8_t len, rt_uint8_t *buf)
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{
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struct rt_i2c_msg msgs[2];
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msgs[0].addr = kMMA8562_ADDR;
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msgs[0].flags = RT_I2C_WR;
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msgs[0].buf = ®
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msgs[0].len = 1;
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msgs[1].addr = kMMA8562_ADDR;
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msgs[1].flags = RT_I2C_RD;
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msgs[1].buf = buf;
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msgs[1].len = len;
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if (rt_i2c_transfer(mma8562_i2c_bus, msgs, 2) == 2)
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{
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return RT_EOK;
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}
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else
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{
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return -RT_ERROR;
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}
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}
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rt_err_t mma8562_write_reg(rt_uint8_t reg, rt_uint8_t data)
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{
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rt_uint8_t buf[2];
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buf[0] = reg;
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buf[1] = data;
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if (rt_i2c_master_send(mma8562_i2c_bus, kMMA8562_ADDR, 0, buf ,2) == 2)
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{
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return RT_EOK;
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}
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else
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{
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return -RT_ERROR;
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}
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}
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#ifdef RT_USING_FINSH
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#include <finsh.h>
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#include <rtdevice.h>
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void get_mma8562(uint8_t data)
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{
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volatile acceleration_t accel;
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uint8_t ucVal1 = 0;
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uint8_t ucVal2 = 0;
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uint8_t ucStatus = 0;
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do {
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mma8562_read_reg(kMMA8562_STATUS, 1, &ucStatus);
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} while (!(ucStatus & 0x08));
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mma8562_read_reg(kMMA8562_OUT_X_MSB, 1, &ucVal1);
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mma8562_read_reg(kMMA8562_OUT_X_LSB, 1, &ucVal2);
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accel.x = ucVal1*256 +ucVal2;
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mma8562_read_reg(kMMA8562_OUT_Y_MSB, 1, &ucVal1);
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mma8562_read_reg(kMMA8562_OUT_Y_LSB, 1, &ucVal2);
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accel.y = ucVal1*256 +ucVal2;
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mma8562_read_reg(kMMA8562_OUT_Z_MSB, 1, &ucVal1);
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mma8562_read_reg(kMMA8562_OUT_Z_LSB, 1, &ucVal2);
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accel.z = ucVal1*256 +ucVal2;
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rt_kprintf("*** MMA8562 X %d, Y %d, Z %d\r\n", (accel.x), (accel.y), (accel.z) );
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}
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MSH_CMD_EXPORT(get_mma8562, get mma8562. e.g: get_mma8562(0))
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#endif
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int mma8562_hw_init(void)
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{
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// Init the I2C port.
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// Should be init in startup
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uint8_t val = 0;
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mma8562_i2c_bus = rt_i2c_bus_device_find(MMA8562_I2CBUS_NAME); /* */
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// Read WHO_AM_I register.
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mma8562_read_reg(kMMA8562_WHO_AM_I, 1, &val);
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if (val != kMMA8562_WHO_AM_I_Device_ID)
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{
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rt_kprintf("MMA8562: Unexpected result from WHO_AM_I (0x%02x)\n", val);
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return RT_ERROR;
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}
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/* please refer to the "example FXOS8700CQ Driver Code" in FXOS8700 datasheet. */
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/* write 0000 0000 = 0x00 to accelerometer control register 1 */
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/* standby */
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/* [7-1] = 0000 000 */
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/* [0]: active=0 */
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val = 0;
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mma8562_write_reg( kMMA8562_CTRL_REG1, val);
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/* write 0000 0001= 0x01 to XYZ_DATA_CFG register */
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/* [7]: reserved */
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/* [6]: reserved */
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/* [5]: reserved */
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/* [4]: hpf_out=0 */
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/* [3]: reserved */
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/* [2]: reserved */
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/* [1-0]: fs=01 for accelerometer range of +/-4g range with 0.488mg/LSB */
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/* databyte = 0x01; */
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val = 0x01;
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mma8562_write_reg(kMMA8562_XYZ_DATA_CFG, val);
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/* write 0000 1101 = 0x0D to accelerometer control register 1 */
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/* [7-6]: aslp_rate=00 */
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/* [5-3]: dr=001 for 200Hz data rate (when in hybrid mode) */
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/* [2]: lnoise=1 for low noise mode */
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/* [1]: f_read=0 for normal 16 bit reads */
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/* [0]: active=1 to take the part out of standby and enable sampling */
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/* databyte = 0x0D; */
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val = 0x0D;
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mma8562_write_reg(kMMA8562_CTRL_REG1, val);
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return 0;
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}
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INIT_DEVICE_EXPORT(mma8562_hw_init);
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////////////////////////////////////////////////////////////////////////////////
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// EOF
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////////////////////////////////////////////////////////////////////////////////
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