2553 驱动sht30

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chuandaoxy| 中级工程师

楼主 | 2024-7-9 16:08 | 只看该作者回帖奖励

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ADDR, AD, ST, TE, sht30

找到一个多字节写的code,如下，逻辑上没有错误，但是sht没有子地址吧，函数里有个uint8_t reg_addr,如何替换

I2C_Mode I2C_Master_WriteReg(uint8_t dev_addr, uint8_t reg_addr, uint8_t *reg_data, uint8_t count)

{
/* Initialize state machine */
MasterMode = TX_REG_ADDRESS_MODE;
TransmitRegAddr = reg_addr;

//Copy register data to TransmitBuffer
CopyArray(reg_data, TransmitBuffer, count);

TXByteCtr = count;
RXByteCtr = 0;
ReceiveIndex = 0;
TransmitIndex = 0;

/* Initialize slave address and interrupts */
UCB0I2CSA = dev_addr;
IFG2 &= ~(UCB0TXIFG + UCB0RXIFG);    // Clear any pending interrupts
IE2 &= ~UCB0RXIE;                      // Disable RX interrupt
IE2 |= UCB0TXIE;                      // Enable TX interrupt

UCB0CTL1 |= UCTR + UCTXSTT;          // I2C TX, start condition
__bis_SR_register(CPUOFF + GIE);    // Enter LPM0 w/ interrupts

return MasterMode;
}

下面是stm32的code,HAL_I2C_Master_Transmit(&hi2c1, iic_addr, cmd, 2, 100);函数的功能等同于上面的函数

static void start_measure(void)

{

const uint8_t iic_addr = 0x44 << 1;

const uint16_t cmd_meas_freq = 0x2737;

uint8_t cmd[2];

cmd[0] = cmd_meas_freq >> 8;

cmd[1] = cmd_meas_freq;

HAL_I2C_Master_Transmit(&hi2c1, iic_addr, cmd, 2, 100);

}

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