AURIX TC397 DTS 内部温度传感器
目录
- DTS
- DTS Example
- 微信公众号
DTS
参考TC3XX User Manual, 11.2.1.4小节, 11.2.3.6小节, 12.2.1.4小节, 12.2.3.6小节.
DTS, Die Temperature Sensor, 核心温度传感器. 或者DTSC, Core Die Temperature Sensor.
DTS直接产生当前温度的测量结果. DTS可以在数据表中记录的TSR温度范围内的（TNL + TCALACC）参数范围内准确测量温度。 测量结果在DTSSTAT.RESULT寄存器位字段中定期更新，分辨率小于开尔文度的1/5。 DTS可在器件启动时冷PORST复位释放后使用，并且在正常RUN / SLEEP模式下连续进行温度测量. DTS和相应的寄存器不受PORST预热，系统或应用程序复位的影响； 因此，任何热复位后，都可以立即使用较早转换得到的DTSTAT温度结果.
完成正在进行的温度测量后，DTSSTAT.RESULT位字段将与新值一致更新。 测量完成后可以生成中断服务请求（SRC_PMSDTS）。DTS精度和测量时间在数据表中定义.
DTS的上限和下限在DTSLIM.UPPER和LOWER寄存器位中配置. 违反这些限制时，将设置DTSLIM.UOF和LLU状态位，并将警报转发到SMU和HSM. 启动后，必须先根据应用重新配置DTS限制，然后才能激活来自SMU或HSM的警报响应. 仅当有新的DTS转换结果可用时，DTS比较器才被触发以检查实际DTSSTAT.RESULT是否符合上下限.
iLLD->DTS中说, DTS给出芯片温度结果，并将其解码为标准温度值. 为了获得可靠的温度，最小的前两个温度结果将被忽略.
DTS Example
参考 SCU_Die_Temp_Sensor_1 for KIT_AURIX_TC397_TFT
用串口打印温度(℃), Cpu0_Main.c代码如下:
#include "Ifx_Types.h"
#include "IfxCpu.h"
#include "IfxScuWdt.h"IFX_ALIGN(4) IfxCpu_syncEvent g_cpuSyncEvent = 0;#include "IfxDts_Dts.h"
#include "IfxAsclin_Asc.h"
#include "Bsp.h"#define ISR_PRIORITY_UART_TX 1 /* Priority for UART Transmit interrupt */
#define ISR_PRIORITY_UART_RX 2 /* Priority for UART Receive interrupt */
#define ISR_PRIORITY_UART_ER 3 /* Priority for UART Error interrupt */
#define UART_TX_BUFFER_SIZE 64 /* Transmit buffer size */
#define UART_RX_BUFFER_SIZE 64 /* Receive buffer size */#define ASC_BAUDRATE 115200 /* UART baud rate */#define ISR_PRIORITY_DTS 4 /* Priority for DTS interrupt */
#define MIN_TEMP_LIMIT -35 /* Lower temperature limit */
#define MAX_TEMP_LIMIT 150 /* Upper temperature limit */IfxAsclin_Asc g_asclinHandle; /* Variable for ASCLIN UART module */
IfxStdIf_DPipe g_stdInterface; /* Variable for Standard interface */
uint8 g_uartTxBuffer[UART_TX_BUFFER_SIZE + sizeof(Ifx_Fifo) + 8];
uint8 g_uartRxBuffer[UART_RX_BUFFER_SIZE + sizeof(Ifx_Fifo) + 8];uint8 g_isMeasureAvailable = FALSE; /* Variable to store availability of new measurements */IFX_INTERRUPT(ASCLIN_ISR_Tx, 0, ISR_PRIORITY_UART_TX);
void ASCLIN_ISR_Tx(void)
{IfxAsclin_Asc_isrTransmit(&g_asclinHandle);
}IFX_INTERRUPT(ASCLIN_ISR_Rx, 0, ISR_PRIORITY_UART_RX);
void ASCLIN_ISR_Rx(void)
{IfxAsclin_Asc_isrReceive(&g_asclinHandle);
}IFX_INTERRUPT(ASCLIN_ISR_Er, 0, ISR_PRIORITY_UART_ER);
void ASCLIN_ISR_Er(void)
{IfxAsclin_Asc_isrError(&g_asclinHandle);
}IFX_INTERRUPT(DTS_ISR, 0, ISR_PRIORITY_DTS);
void DTS_ISR(void)
{g_isMeasureAvailable = TRUE; /* Notify the system that a new measurement is ready */
}/* Function to initialize ASCLIN module */
void initSerialInterface(void)
{IfxAsclin_Asc_Config ascConf;IfxAsclin_Asc_initModuleConfig(&ascConf, &MODULE_ASCLIN0); /* Fill the structure with default values *//* Set the desired baudrate */ascConf.baudrate.baudrate = ASC_BAUDRATE; /* Set the baudrate in bit/s *//* ISR priorities and interrupt target */ascConf.interrupt.txPriority = ISR_PRIORITY_UART_TX; /* Set the interrupt priority for tx events */ascConf.interrupt.rxPriority = ISR_PRIORITY_UART_RX; /* Set the interrupt priority for rx events */ascConf.interrupt.erPriority = ISR_PRIORITY_UART_ER; /* Set the interrupt priority for err events */ascConf.interrupt.typeOfService = IfxSrc_Tos_cpu0; /* Set the service provider responsible for* handling the interrupts *//* Pin configuration */const IfxAsclin_Asc_Pins pins = {NULL, IfxPort_InputMode_pullUp, /* CTS pin not used */&IfxAsclin0_RXA_P14_1_IN, IfxPort_InputMode_pullUp, /* RX: select the pin connected to the USB */NULL, IfxPort_OutputMode_pushPull, /* RTS pin not used */&IfxAsclin0_TX_P14_0_OUT, IfxPort_OutputMode_pushPull, /* TX: select the pin connected to the USB */IfxPort_PadDriver_cmosAutomotiveSpeed1};ascConf.pins = &pins;/* FIFO configuration */ascConf.txBuffer = g_uartTxBuffer; /* Set the transmit buffer */ascConf.txBufferSize = UART_TX_BUFFER_SIZE; /* Set the transmit buffer size */ascConf.rxBuffer = g_uartRxBuffer; /* Set the receive buffer */ascConf.rxBufferSize = UART_RX_BUFFER_SIZE; /* Set the receive buffer size *//* Init module */IfxAsclin_Asc_initModule(&g_asclinHandle, &ascConf); /* Initialize ASCLIN module as UART with* the given configuration */
}void core0_main(void)
{IfxCpu_enableInterrupts();/* !!WATCHDOG0 AND SAFETY WATCHDOG ARE DISABLED HERE!!* Enable the watchdogs and service them periodically if it is required*/IfxScuWdt_disableCpuWatchdog(IfxScuWdt_getCpuWatchdogPassword());IfxScuWdt_disableSafetyWatchdog(IfxScuWdt_getSafetyWatchdogPassword());/* Wait for CPU sync event */IfxCpu_emitEvent(&g_cpuSyncEvent);IfxCpu_waitEvent(&g_cpuSyncEvent, 1);/* Init Serial Interface */initSerialInterface();/* Init Standard Interface */IfxAsclin_Asc_stdIfDPipeInit(&g_stdInterface, &g_asclinHandle);initTime();IfxDts_Dts_Config dtsConf;IfxDts_Dts_initModuleConfig(&dtsConf); /* Initialize the structure with default values */dtsConf.lowerTemperatureLimit = MIN_TEMP_LIMIT; /* Set the lower temperature limit */dtsConf.upperTemperatureLimit = MAX_TEMP_LIMIT; /* Set the upper temperature limit */dtsConf.isrPriority = ISR_PRIORITY_DTS; /* Set the interrupt priority for new measurement events */dtsConf.isrTypeOfService = IfxSrc_Tos_cpu0; /* Set the service provider responsible for handling* the interrupts */IfxDts_Dts_initModule(&dtsConf); /* Initialize the DTS with the given configuration */while(1){if(g_isMeasureAvailable == TRUE){/* Get the new measurement */float32 temperature = IfxDts_Dts_getTemperatureCelsius();/* Print the measured temperature */IfxStdIf_DPipe_print(&g_stdInterface, "Temperature read: " "%.2f" " deg.Celsius\n\r", temperature);/* Reset the global variable that stores availability of new measurements */g_isMeasureAvailable = FALSE;}waitTime(TimeConst_1s);}
}
编译运行, 默认六核心全开的暖宝宝还是给这个冬天带来一丝温暖:
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