hulk/xlsw_3dp_LDC1612
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LDC1612单次读取16bit正常，可以获取厂商ID或者设备ID，但是无法连续获取

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yelvlab 2024-12-16 11:41:26 +08:00
parent 3f961a6a3e
commit dbff482cf3
3 changed files with 26 additions and 14 deletions
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2
inc/LDC1612.h
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@ -58,6 +58,6 @@ typedef enum {
void I2C_config(void); void I2C_config(void);
void I2C_scan(void); void I2C_scan(void);
int LDC1612_IIC_read_16bits(void); int LDC1612_IIC_read_16bits(uint8_t reg, uint16_t *data);
#endif //LDC1612_H #endif //LDC1612_H

16
src/LDC1612.c
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@ -84,9 +84,7 @@ void I2C_scan(void) {
} }
} }
int LDC1612_IIC_read_16bits(void) { int LDC1612_IIC_read_16bits(uint8_t reg, uint16_t *data) {
uint8_t data[2] = {0};
uint16_t raw_temp = 0;
uint16_t timeout = 0; uint16_t timeout = 0;
i2c_ack_config(I2C0, I2C_ACK_ENABLE); i2c_ack_config(I2C0, I2C_ACK_ENABLE);
@ -122,13 +120,15 @@ int LDC1612_IIC_read_16bits(void) {
while (!i2c_flag_get(I2C0, I2C_FLAG_TBE) && (timeout < I2C_TIME_OUT)) //判断地址是否发送完成，然后发送寄存器地址 while (!i2c_flag_get(I2C0, I2C_FLAG_TBE) && (timeout < I2C_TIME_OUT)) //判断地址是否发送完成，然后发送寄存器地址
timeout++; timeout++;
if (timeout < I2C_TIME_OUT) { if (timeout < I2C_TIME_OUT) {
i2c_data_transmit(I2C0, READ_DEVICE_ID); i2c_data_transmit(I2C0, reg);
timeout = 0; timeout = 0;
// i2c_start_on_bus(I2C0); // i2c_start_on_bus(I2C0);
} else { } else {
return -4; // 超时返回错误 return -4; // 超时返回错误
} }
delay_us(10);
while (i2c_flag_get(I2C0, I2C_FLAG_BTC) && (timeout < I2C_TIME_OUT)) //判断发送缓冲器是否为空，为空后（发送完毕）重新发送开始信号 while (i2c_flag_get(I2C0, I2C_FLAG_BTC) && (timeout < I2C_TIME_OUT)) //判断发送缓冲器是否为空，为空后（发送完毕）重新发送开始信号
timeout++; timeout++;
if (timeout < I2C_TIME_OUT) { if (timeout < I2C_TIME_OUT) {
@ -162,20 +162,20 @@ int LDC1612_IIC_read_16bits(void) {
timeout++; timeout++;
} }
if (timeout < I2C_TIME_OUT) { if (timeout < I2C_TIME_OUT) {
data[0] = i2c_data_receive(I2C0); *data = i2c_data_receive(I2C0) << 8;
timeout = 0; timeout = 0;
} else { } else {
return -8; // 超时返回错误 return -8; // 超时返回错误
} }
// i2c_ack_config(I2C0, I2C_ACK_DISABLE); // 关闭发送ACK，它会在下一个字节完成后发送NAK i2c_ack_config(I2C0, I2C_ACK_DISABLE); // 关闭发送ACK，它会在下一个字节完成后发送NAK
// 读取第二个字节的数据 // 读取第二个字节的数据
while (!i2c_flag_get(I2C0, I2C_FLAG_RBNE) && (timeout < I2C_TIME_OUT)) { while (!i2c_flag_get(I2C0, I2C_FLAG_RBNE) && (timeout < I2C_TIME_OUT)) {
timeout++; timeout++;
} }
if (timeout < I2C_TIME_OUT) { if (timeout < I2C_TIME_OUT) {
data[1] = i2c_data_receive(I2C0); *data |= i2c_data_receive(I2C0);
timeout = 0; timeout = 0;
} else { } else {
return -9; // 超时返回错误 return -9; // 超时返回错误
@ -183,6 +183,6 @@ int LDC1612_IIC_read_16bits(void) {
i2c_stop_on_bus(I2C0); i2c_stop_on_bus(I2C0);
printf("device id = %x\r\n", (data[0] <<8 | data[1])); // printf("device id = %x\r\n", (data[0] <<8 | data[1]));
return 0; return 0;
} }

22
src/main.c
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@ -46,8 +46,7 @@ void led_config(void)
\param[out] none \param[out] none
\retval none \retval none
*/ */
int main(void) int main(void) {
{
/* configure systick */ /* configure systick */
systick_config(); systick_config();
RS485_config(); RS485_config();
@ -58,12 +57,25 @@ int main(void)
printf("XLSW-3DP-LDC1612! V0.0.1\r\n"); printf("XLSW-3DP-LDC1612! V0.0.1\r\n");
printf("\r\n"); printf("\r\n");
delay_ms(500);
// I2C_scan(); // int result = 0;
uint16_t data = 0;
uint16_t device_id = 0;
LDC1612_IIC_read_16bits(READ_DEVICE_ID, &data);
// printf("result = %d\r\n", result);
// delay_ms(1000);
LDC1612_IIC_read_16bits(READ_DEVICE_ID, &device_id);
printf("Manufacturer: 0x%x\r\n", data);
printf("Device: 0x%x\r\n", device_id);
while (1) {
delay_ms(1000); delay_ms(1000);
printf("OK!!!\r\n");
while(1){
} }
} }