uint8_t MPU6050_writeMemoryBlock(const uint8_t *data, uint16_t dataSize, uint8_t bank, uint8_t address, uint8_t verify, uint8_t useProgMem)
{
uint8_t chunkSize;
//uint8_t *verifyBuffer;
uint8_t *tprogBuffer;
uint16_t i;
uint8_t j;
MPU6050_setMemoryBank(bank,0,0);
MPU6050_setMemoryStartAddress(address);
for (i = 0; i < dataSize;) {
// determine correct chunk size according to bank position and data size
chunkSize = MPU6050_DMP_MEMORY_CHUNK_SIZE;
// make sure we don't go past the data size
if (i + chunkSize > dataSize) chunkSize = dataSize - i;
// make sure this chunk doesn't go past the bank boundary (256 bytes)
if (chunkSize > 256 - address) chunkSize = 256 - address;
// write the chunk of data as specified
tprogBuffer = (uint8_t*)data + i;
IICwriteBytes(devAddr, MPU6050_RA_MEM_R_W, chunkSize, tprogBuffer);
// verify data if needed
if (verify) {
MPU6050_setMemoryBank(bank,0,0);
MPU6050_setMemoryStartAddress(address);
IICreadBytes(devAddr, MPU6050_RA_MEM_R_W, chunkSize, verifyBuffer);
for(j=0; j<chunkSize; j++) {
if(tprogBuffer[j] != verifyBuffer[j])
return 0; // uh oh.
}
}
// increase byte index by [chunkSize]
i += chunkSize;
// uint8_tautomatically wraps to 0 at 256
address += chunkSize;
// if we aren't done, update bank (if necessary) and address
if (i < dataSize) {
if (address == 0) bank++;
MPU6050_setMemoryBank(bank,0,0);
MPU6050_setMemoryStartAddress(address);
}
}
return 1;
}
//初始化DMP引擎
uint8_t MPU6050_DMP_Initialize(void)
{
uint8_t dmpUpdate[16], j;
uint16_t pos = 0;
uint8_t fifoCount;
uint8_t fifoBuffer[128];
int8_t xgOffset , ygOffset , zgOffset;
// reset device
//printf(("\r\n=======配置DMP引擎=========\r\n"));
//printf(("复位MPU6050...\r\n"));
MPU6050_reset();
delay_ms(50); // wait after reset 50ms
//printf(("禁止休眠模式...\r\n"));
MPU6050_setSleepEnabled(0);
//printf(("\r\n读取MPU6050硬件版本...\r\n"));
//printf(("正在选择用户内存块...\r\n"));
MPU6050_setMemoryBank(0x10, 1, 1);
//printf(("正在选择用户内存字节...\r\n"));
MPU6050_setMemoryStartAddress(0x06);
//printf(("正在检查硬件版本...\r\n"));
MPU6050_readMemoryByte();
////printf(("Revision @ user[16][6] = \r\n"));
//printf(("复位内存块...\r\n"));
MPU6050_setMemoryBank(0, 0, 0);
// check OTP bank valid
//printf(("读取OTP块有效标志...\r\n"));
MPU6050_getOTPBankValid();
// //printf("OTP bank is ");
// //printf(otpValid ? ("valid!") : ("invalid!"));
// get X/Y/Z gyro offsets
//printf(("读取加速度偏移值...\r\n"));
xgOffset = MPU6050_getXGyroOffsetTC();
ygOffset = MPU6050_getYGyroOffsetTC();
zgOffset = MPU6050_getZGyroOffsetTC();
// setup weird slave stuff (?)
//printf(("设置从器件地址为0x7F...\r\n"));
MPU6050_setSlaveAddress(0, 0x7F);
//printf(("禁止IIC主器件模式...\r\n"));
MPU6050_setI2CMasterModeEnabled(0);
//主控制器的I2C与 MPU6050的AUXI2C 直通。控制器可以直接访问HMC5883L
MPU6050_setI2CBypassEnabled(1);
//printf(("设置从器件地址为0x68...\r\n"));
MPU6050_setSlaveAddress(0, 0x68);
//printf(("复位IIC主器件控制权...\r\n"));
MPU6050_resetI2CMaster();
delay_ms(20);
// load DMP code into memory banks
//printf(("正在写入DMP代码段到MPU6050 \r\n"));
if (MPU6050_writeProgMemoryBlock(dmpMemory, MPU6050_DMP_CODE_SIZE, 0, 0, 1)) {
//printf(("DMP代码写入校验成功...\r\n"));
//printf(("配置DMP和有关设置...\r\n"));
// write DMP configuration
//printf(("正在写入DMP配置代码到MPU6050内存...\r\n"));
if (MPU6050_writeProgDMPConfigurationSet(dmpConfig, MPU6050_DMP_CONFIG_SIZE)) {
//printf(("DMP配置代码写入校验成功\r\n"));
//printf(("设置Z轴角速度时钟源...\r\n"));
MPU6050_setClockSource(MPU6050_CLOCK_PLL_ZGYRO);
//printf(("使能DMP引擎和FIFO中断...\r\n"));
MPU6050_setIntEnabled(0x12);
//printf(("设置DMP采样率为200Hz...\r\n"));
MPU6050_setRate(4); // 1khz / (1 + 4) = 200 Hz
//printf(("设置外部同步帧到TEMP_OUT_L[0]...\r\n"));
MPU6050_setExternalFrameSync(MPU6050_EXT_SYNC_TEMP_OUT_L);
//printf(("设置DLPF带宽为42Hz...\r\n"));
MPU6050_setDLPFMode(MPU6050_DLPF_BW_42);
//printf(("设置角速度精度为 +/- 2000 deg/sec...\r\n"));
MPU6050_setFullScaleGyroRange(MPU6050_GYRO_FS_2000);
//printf(("设置DMP配置字节...\r\n"));
MPU6050_setDMPConfig1(0x03);
MPU6050_setDMPConfig2(0x00);
//printf(("清楚OTP块标志...\r\n"));
MPU6050_setOTPBankValid(0);
//printf(("设置X/Y/Z轴角速度为先前值...\r\n"));
MPU6050_setXGyroOffsetTC(xgOffset);
MPU6050_setYGyroOffsetTC(ygOffset);
MPU6050_setZGyroOffsetTC(zgOffset);
// DMPCalibrate(); //tobe tested
//printf(("写入最后内存跟新到 1/7 ...\r\n"));
for (j = 0; j < 4 || j < dmpUpdate[2] + 3; j++, pos++) dmpUpdate[j] = dmpUpdates[pos];
MPU6050_writeMemoryBlock(dmpUpdate + 3, dmpUpdate[2], dmpUpdate[0], dmpUpdate[1], 1, 0);
//printf(("写入最后内存跟新到 2/7 ...\r\n"));
for (j = 0; j < 4 || j < dmpUpdate[2] + 3; j++, pos++) dmpUpdate[j] = dmpUpdates[pos];
MPU6050_writeMemoryBlock(dmpUpdate + 3, dmpUpdate[2], dmpUpdate[0], dmpUpdate[1], 0, 0);
//printf(("正在复位FIFO...\r\n"));
MPU6050_resetFIFO();
//printf(("正在读取FIFO计数...\r\n"));
fifoCount = MPU6050_getFIFOCount();
MPU6050_getFIFOBytes(fifoBuffer, fifoCount);
//printf(("正在设置运动阈值为2...\r\n"));
MPU6050_setMotionDetectionThreshold(2);
//printf(("正在设置0运动检测阈值为156...\r\n"));
MPU6050_setZeroMotionDetectionThreshold(156);
//printf(("正在设置运动检测持续时间为80...\r\n"));
MPU6050_setMotionDetectionDuration(80);
//printf(("正在设置0运动检测持续时间为0...\r\n"));
MPU6050_setZeroMotionDetectionDuration(0);
//printf(("复位FIFO...\r\n"));
MPU6050_resetFIFO();
//printf(("正在使能FIFO...\r\n"));
MPU6050_setFIFOEnabled(1);
//printf(("正在使能DMP...\r\n"));
MPU6050_setDMPEnabled(1);
//printf(("复位DMPDMP...\r\n"));
MPU6050_resetDMP();
//printf(("写入最后内存跟新到 3/7 ......\r\n"));
for (j = 0; j < 4 || j < dmpUpdate[2] + 3; j++, pos++) dmpUpdate[j] = dmpUpdates[pos];
MPU6050_writeMemoryBlock(dmpUpdate + 3, dmpUpdate[2], dmpUpdate[0], dmpUpdate[1], 0, 0);
//printf(("写入最后内存跟新到 4/7 ......\r\n"));
for (j = 0; j < 4 || j < dmpUpdate[2] + 3; j++, pos++) dmpUpdate[j] = dmpUpdates[pos];
MPU6050_writeMemoryBlock(dmpUpdate + 3, dmpUpdate[2], dmpUpdate[0], dmpUpdate[1], 0, 0);
//printf(("写入最后内存跟新到 5/7 ......\r\n"));
for (j = 0; j < 4 || j < dmpUpdate[2] + 3; j++, pos++) dmpUpdate[j] = dmpUpdates[pos];
MPU6050_writeMemoryBlock(dmpUpdate + 3, dmpUpdate[2], dmpUpdate[0], dmpUpdate[1], 0, 0);
//printf(("等待FIFO计数>=2...\r\n"));
while ((fifoCount = MPU6050_getFIFOCount()) < 3);
//printf(("复位 FIFO...\r\n"));
MPU6050_getFIFOBytes(fifoBuffer, min(fifoCount, 128)); // safeguard only 128 bytes
//printf(("读取中断状态...\r\n"));
MPU6050_getIntStatus();
//printf(("写入最后内存跟新到 6/7 ......\r\n"));
for (j = 0; j < 4 || j < dmpUpdate[2] + 3; j++, pos++) dmpUpdate[j] = dmpUpdates[pos];
MPU6050_readMemoryBlock(dmpUpdate + 3, dmpUpdate[2], dmpUpdate[0], dmpUpdate[1]);
//printf(("等待FIFO计数>=2...\r\n"));
while ((fifoCount = MPU6050_getFIFOCount()) < 3);
//printf(("正在读取FIFO...\r\n"));
MPU6050_getFIFOBytes(fifoBuffer, min(fifoCount, 128)); // safeguard only 128 bytes
//printf(("正在读取中断状态...\r\n"));
MPU6050_getIntStatus();
//printf(("写入最后内存跟新到 7/7 ......\r\n"));
for (j = 0; j < 4 || j < dmpUpdate[2] + 3; j++, pos++) dmpUpdate[j] = dmpUpdates[pos];
MPU6050_writeMemoryBlock(dmpUpdate + 3, dmpUpdate[2], dmpUpdate[0], dmpUpdate[1], 0, 0);
//printf(("DMP设置一切正常...\r\n"));
//printf(("关闭DMP引擎...\r\n"));
MPU6050_setDMPEnabled(0);
//printf(("设置内部42字节缓冲包...\r\n"));
dmpPacketSize = 42;
//printf(("最后一次复位FIFO和中断状态...\r\n"));
MPU6050_resetFIFO();
MPU6050_getIntStatus();
//printf(("打开DMP引擎...\r\n"));
MPU6050_setDMPEnabled(1);
//printf(("DMP引擎准备就绪,等待第一次数据中断...\r\n"));
MPU6050_getIntStatus();
} else {
//printf(("DMP引擎配置校验出错...\r\n"));
return 2; // configuration block loading failed
}
} else {
//printf(("DMP代码校验出错.\r\n"));
return 1; // main binary block loading failed
}
//printf(("======DMP引擎初始化完成========\r\n"));
return 0; // success
}