用C语言写一个在msp432的基础上使用TPL0401A的程序代码

以下是用C语言写一个在msp432的基础上使用TPL0401A的程序代码的示例：

#include <msp432.h>

#define TPL0401A_ADDR 0x2F

void TPL0401A_init(void) {
// setup I2C communication
EUSCI_B1->CTLW0 |= EUSCI_B_CTLW0_SWRST; // Software reset enabled
EUSCI_B1->CTLW0 = EUSCI_B_CTLW0_SWRST | // Remain eUSCI in reset mode
EUSCI_B_CTLW0_MODE_3 | // I2C mode
EUSCI_B_CTLW0_MST | // Master mode
EUSCI_B_CTLW0_SYNC | // Sync mode
EUSCI_B_CTLW0_SSEL__SMCLK; // SMCLK
EUSCI_B1->BRW = 30; // 300kHz
EUSCI_B1->CTLW0 &= ~EUSCI_B_CTLW0_SWRST; // Release eUSCI from reset

// configuration for TPL0401A
uint8_t config_data[2] = {0x80, 0x00}; // write data to configuration register
EUSCI_B1->I2CSA = TPL0401A_ADDR; // slave address
EUSCI_B1->CTLW0 |= EUSCI_B_CTLW0_TR; // set transmitter mode
EUSCI_B1->CTLW0 |= EUSCI_B_CTLW0_TXSTT; // send start condition
while (!(EUSCI_B1->IFG & EUSCI_B_IFG_TXIFG0)); // wait for TXBUF to be empty
EUSCI_B1->TXBUF = config_data[0];
while (!(EUSCI_B1->IFG & EUSCI_B_IFG_TXIFG0)); // wait for TXBUF to be empty
EUSCI_B1->TXBUF = config_data[1];
while (!(EUSCI_B1->IFG & EUSCI_B_IFG_TXIFG0)); // wait for TXBUF to be empty
EUSCI_B1->CTLW0 |= EUSCI_B_CTLW0_TXSTP; // send stop condition
}

void TPL0401A_set_resistance(uint8_t value) {
uint8_t write_data[2] = {0x01, value & 0x7F}; // write data to wiper register
EUSCI_B1->I2CSA = TPL0401A_ADDR; // slave address
EUSCI_B1->CTLW0 |= EUSCI_B_CTLW0_TR; // set transmitter mode
EUSCI_B1->CTLW0 |= EUSCI_B_CTLW0_TXSTT; // send start condition
while (!(EUSCI_B1->IFG & EUSCI_B_IFG_TXIFG0)); // wait for TXBUF to be empty
EUSCI_B1->TXBUF = write_data[0];
while (!(EUSCI_B1->IFG & EUSCI_B_IFG_TXIFG0)); // wait for TXBUF to be empty
EUSCI_B1->TXBUF = write_data[1];
while (!(EUSCI_B1->IFG & EUSCI_B_IFG_TXIFG0)); // wait for TXBUF to be empty
EUSCI_B1->CTLW0 |= EUSCI_B_CTLW0_TXSTP; // send stop condition
}

int main(void) {
WDT_A->CTL = WDT_A_CTL_PW | WDT_A_CTL_HOLD; // stop watchdog timer

TPL0401A_init(); // initialize TPL0401A

while (1) {
// set TPL0401A resistance here
TPL0401A_set_resistance(0x20); // set resistance to 50%
}
}

请注意，以上代码仅演示如何在msp432的基础上使用TPL0401A，具体的TPL0401A设置和使用应根据对应的设备手册进行。