请教k60使用spi对L3G4200模块初始化不成功的问题
最近再调陀螺仪L3G4200模块，但是使用spi初始化陀螺仪的时候，有几个问题，不知道是spi底层的原因还是我时序的问题，用的是k60芯片，野火开发的库问题1：使用spi初始化的时候必须要对寄存器重复写入多次才能将数据写入，已经加了上电延时，还是不行
问题2：部分寄存器（CTRL3，CTRL4）写入的数据和读出来的数据不一致，比如说我对CTRL3写入的是0x80，读出来的是0x0f，如图
问题3：根据官方手册上说的，读寄存器WHO_AM_I的时候数据应该是0xD3，实际我读出来的是0xDF，
不懂为什么，求大神帮忙看看{:cry:} {:cry:}
/*模块初始化*/
void L3D4200Init(void)
{
int i = 0;
lptmr_delay_ms(1000);
spi_init(GYRO_SPI, GYRO_PCS, MASTER, 5000*1000); //初始化spi
while(i++ < 1000){
//spi_mosi(GYRO_SPI, GYRO_PCS, buff, NULL, 2);
Gyro_Write(CTRL_REG2, 0x00);
Gyro_Write(CTRL_REG3, 0x08);
Gyro_Write(CTRL_REG4, 0x30);
Gyro_Write(CTRL_REG5, 0x00);
Gyro_Write(CTRL_REG1, 0x0f);
}
}
/*读取*/
uint8 Gyro_Read(uint8 reg, uint8 *dat)
{
reg |= 0x80;
spi_mosi_cmd(GYRO_SPI, GYRO_PCS, ®, NULL, NULL, &GyroRec, 1, 1);
reg++;
spi_mosi_cmd(GYRO_SPI, GYRO_PCS, ®, NULL, NULL, &GyroRec, 1, 1);
reg++;
spi_mosi_cmd(GYRO_SPI, GYRO_PCS, ®, NULL, NULL, &GyroRec, 1, 1);
reg++;
spi_mosi_cmd(GYRO_SPI, GYRO_PCS, ®, NULL, NULL, &GyroRec, 1, 1);
reg++;
spi_mosi_cmd(GYRO_SPI, GYRO_PCS, ®, NULL, NULL, &GyroRec, 1, 1);
reg++;
spi_mosi_cmd(GYRO_SPI, GYRO_PCS, ®, NULL, NULL, &GyroRec, 1, 1);
// t =
// spi_mosi_cmd(GYRO_SPI, GYRO_PCS, ®, GyroRec, NULL, &GyroRec, 1, 1);
uint8 cmd = 0;
uint8 *ptet = tet;
cmd = CTRL_REG1 | 0x80;
spi_mosi_cmd(GYRO_SPI, GYRO_PCS, &cmd, NULL, NULL, ptet++, 1, 1);
cmd += 1;
spi_mosi_cmd(GYRO_SPI, GYRO_PCS, &cmd, NULL, NULL, ptet++, 1, 1);
cmd += 1;
spi_mosi_cmd(GYRO_SPI, GYRO_PCS, &cmd, NULL, NULL, ptet++, 1, 1);
cmd += 1;
spi_mosi_cmd(GYRO_SPI, GYRO_PCS, &cmd, NULL, NULL, ptet++, 1, 1);
cmd += 1;
spi_mosi_cmd(GYRO_SPI, GYRO_PCS, &cmd, NULL, NULL, ptet++, 1, 1);
cmd += 1;
spi_mosi_cmd(GYRO_SPI, GYRO_PCS, &cmd, NULL, NULL, ptet, 1, 1);
//*dat = buff;
return 1;
}
然后是主函数
void main(void)
{
L3D4200Init();
//spi_mosi_cmd(GYRO_SPI, GYRO_PCS, &t, NULL, &s, NULL, 1, 1);
while(1){
Gyro_Read(X_OUT_L, &s);
DisposeGyro();
lptmr_delay_ms(10);
}
}{:cry:}
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