CH432INT#中斷問題
一頁蘩華 發(fā)表于: 2020-12-24 16:39:43
1#

目前使用STM32+CH432，可以收發(fā)，但在設(shè)置INT#中斷為外部輸入中斷后，即使兩個串口有信息回復(fù)，也無法觸發(fā)INT#中斷，如果把void CH432Interrupt(void)?函數(shù)放在進(jìn)程中輪詢，INT#中斷才會觸發(fā)，但是正常流程應(yīng)該是把CH432Interrupt(void)函數(shù)放在INT#中斷服務(wù)函數(shù)里執(zhí)行，請問可能是什么原因？

配置如下：

???UINT16?div;
????UINT8?DLL,?DLM;
/**************************************************************************
??????????設(shè)置CH432串口0的寄存器
**************************************************************************/
????div?=?(?Fpclk?>>?4?)?/?CH432_BPS0;
????DLM?=?div?>>?8;
????DLL?=?div?&?0xff;
????WriteCH432Data(?CH432_IER_PORT,?BIT_IER_RESET);??//端口復(fù)位//
????WriteCH432Data(?CH432_LCR_PORT,?BIT_LCR_DLAB?);????/*?設(shè)置DLAB為1?*/
????WriteCH432Data(?CH432_DLL_PORT,?DLL?);????/*?設(shè)置波特率?*/
????WriteCH432Data(?CH432_DLM_PORT,?DLM?);
????WriteCH432Data(?CH432_FCR_PORT,?BIT_FCR_FIFOEN?);????/*?設(shè)置FIFO模式，觸發(fā)點(diǎn)為14?*/
????WriteCH432Data(?CH432_LCR_PORT,?BIT_LCR_WORDSZ1?|?BIT_LCR_WORDSZ0?);????/*?字長8位，1位停止位、無校驗(yàn)?*/
????WriteCH432Data(?CH432_IER_PORT,?BIT_IER_IEMODEM?|?BIT_IER_IELINES?|?BIT_IER_IETHRE?|?BIT_IER_IERECV?);????/*?使能中斷?*/
????WriteCH432Data(?CH432_MCR_PORT,?BIT_MCR_OUT2);????/*?允許中斷輸出,DTR,RTS為1?*/
/**************************************************************************
??????????設(shè)置CH432串口1的寄存器
**************************************************************************/
????div?=?(?Fpclk?>>?4?)?/?CH432_BPS1;
????DLM?=?div?>>?8;
????DLL?=?div?&?0xff;
????WriteCH432Data(?CH432_IER1_PORT,?BIT_IER_RESET);??//端口復(fù)位//
????WriteCH432Data(?CH432_LCR1_PORT,?BIT_LCR_DLAB?);????/*?設(shè)置DLAB為1?*/
????WriteCH432Data(?CH432_DLL1_PORT,?DLL?);????/*?設(shè)置波特率?*/
????WriteCH432Data(?CH432_DLM1_PORT,?DLM?);
????WriteCH432Data(?CH432_FCR1_PORT,?BIT_FCR_FIFOEN?);????/*?設(shè)置FIFO模式，觸發(fā)點(diǎn)為14?*/
????WriteCH432Data(?CH432_LCR1_PORT,?BIT_LCR_WORDSZ1?|?BIT_LCR_WORDSZ0?);????/*?字長8位，1位停止位、無校驗(yàn)?*/
????WriteCH432Data(?CH432_IER1_PORT,?BIT_IER_IEMODEM?|?BIT_IER_IELINES?|?BIT_IER_IETHRE?|?BIT_IER_IERECV?);????/*?使能中斷?*/
????WriteCH432Data(?CH432_MCR1_PORT,?BIT_MCR_OUT2);????/*?允許中斷輸出，DTR,RTS為1?*/


Felix 發(fā)表于: 2020-12-24 19:46:51
2#

您好，這個初始化沒有什么問題。

可以在接收數(shù)據(jù)時，查看CH432的INT#引腳是否會輸出低電平，若有輸出低電平，則可能是單片機(jī)沒有抓到中斷，可以檢查一下單片機(jī)中斷配置是否正確，CH432的中斷是低電平有效，所以GPIO應(yīng)該設(shè)置為上拉輸入，中斷是下降沿觸發(fā)。

一頁蘩華 發(fā)表于: 2020-12-25 08:41:42
3#

您好，INT#管腳需要外部加上拉電阻嗎

Felix 發(fā)表于: 2020-12-25 09:45:01
4#

如果正確設(shè)置IO的話，是不需要外接上拉電阻的

一頁蘩華 發(fā)表于: 2021-01-07 10:23:11
5#

你好，最近沒處理這個問題，目前測試，單片機(jī)外部中斷輸入脈沖是可以觸發(fā)的，432芯片的INT#管腳沒有輸出下降沿，一直是低電平

一頁蘩華 發(fā)表于: 2021-01-07 12:53:59
6#

IER:00?

IIR1:01?

IIR:01?

FCR:01?

MCR:00?

LSR:60?

MSR:00


Felix 發(fā)表于: 2021-01-07 14:00:06
7#

您好，低電平應(yīng)該是有中斷產(chǎn)生才對。CH432在產(chǎn)生中斷后根據(jù)不同的中斷類型，需要讀取相應(yīng)的寄存器才會清除中斷，如果一直是低電平，則說明中斷沒有清除，可以檢查一下中斷服務(wù)函數(shù)是否有清除中斷。

下面的代碼是對引腳PB10的設(shè)置，以及中斷服務(wù)函數(shù)，其他代碼部分可以參考CH432EVT提供的例程

void?INT_Init(void)??????//***初始化INT#**//
{
	GPIO_InitTypeDef?GPIO_InitStructure;
	EXTI_InitTypeDef?EXTI_InitStructure;
	NVIC_InitTypeDef?NVIC_InitStructure;
	
	RCC_APB2PeriphClockCmd(	RCC_APB2Periph_GPIOB,?ENABLE?);	
????RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);	
	
	//-------------------------------------------
	GPIO_InitStructure.GPIO_Pin?=?GPIO_Pin_10;
	GPIO_InitStructure.GPIO_Speed?=?GPIO_Speed_50MHz;
	GPIO_InitStructure.GPIO_Mode?=?GPIO_Mode_IPU?;???//上拉輸入	
	GPIO_Init(GPIOB,?&GPIO_InitStructure);	
	
	GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,?GPIO_PinSource10);??
????/*?Configure?Button?EXTI?line?*/
????EXTI_InitStructure.EXTI_Line?=?EXTI_Line10;
????EXTI_InitStructure.EXTI_Mode?=?EXTI_Mode_Interrupt;
????EXTI_InitStructure.EXTI_Trigger?=?EXTI_Trigger_Falling;??
????EXTI_InitStructure.EXTI_LineCmd?=?ENABLE;
????EXTI_Init(&EXTI_InitStructure);

	/*?Enable?the?EXTI?Interrupt?*/
	NVIC_InitStructure.NVIC_IRQChannel?=?EXTI15_10_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority?=?0;
	NVIC_InitStructure.NVIC_IRQChannelSubPriority?=?1;
	NVIC_InitStructure.NVIC_IRQChannelCmd?=?ENABLE;
	NVIC_Init(&NVIC_InitStructure);
	//--------------------------------------
}
void?EXTI15_10_IRQHandler(void)
{
	EXTI_ClearITPendingBit(EXTI_Line10);?//清空中斷標(biāo)志位，防止持續(xù)進(jìn)入中斷??	
????UartDetectInterrupt(?);
}
UINT8?UartDetectInterrupt(?)????/*?查詢CH432的中斷狀態(tài)?*/
{
????UINT8?InterruptStatus;
????UINT8?RcvNum?=?0;
????UINT8?s,i;
????UINT8?ModemStatus;
????while(?1?)
????{
????????InterruptStatus?=?ReadCH432Data(?CH432_IIR_PORT?)&?(?~?CH432_IIR_FIFOS_ENABLED?);
????????if(?(?InterruptStatus?&?0x01?)?)????/*?沒有中斷轉(zhuǎn)到串口1?*/
????????{
????????????InterruptStatus?=?ReadCH432Data(?CH432_IIR1_PORT)?&?(?~?CH432_IIR_FIFOS_ENABLED?);????/*?讀串口1的中斷狀態(tài)?*/
????????????if(?(?InterruptStatus?&?0x01?)?)?break;????/*?沒有中斷退出?*/
????????????else
????????????{
????????????????switch(?InterruptStatus?)
????????????????{
????????????????????case?INT_NOINT:????/*?沒有中斷?*/
????????????????????????break;
????????????????????case?INT_THR_EMPTY:????/*?發(fā)送保持寄存器空中斷?*/
????????????????????????break;
????????????????????case?INT_RCV_SUCCESS:????/*?串口接收可用數(shù)據(jù)中斷?*/
????????????????????????RcvNum?=?CH432Seril1Rcv(?buf?);
					????buf[RcvNum]=0;
					????printf("%s",?buf?);
//					????CH432Seril0Send(?buf,?RcvNum?);
????????????????????????break;
????????????????????case?INT_RCV_LINES:????/*?接收線路狀態(tài)中斷?*/
?????????????????????????ReadCH432Data(?CH432_LSR1_PORT);
????????????????????????break;
????????????????????case?INT_RCV_OVERTIME:????/*?接收數(shù)據(jù)超時中斷?*/
????????????????????????RcvNum?=?CH432Seril1Rcv(?buf?);
					????buf[RcvNum]=0;
					????printf("%s",?buf?);
//????????????????????????CH432Seril1Send(?buf,?RcvNum?);
????????????????????????break;
????????????????????default:????/*?不可能發(fā)生的中斷?*/
????????????????????????break;
????????????????}
????????????}
????????}?
????????else
????????{
????????????switch(?InterruptStatus?)
????????????{
????????????????case?INT_NOINT:????/*?沒有中斷?*/
????????????????????break;
????????????????case?INT_THR_EMPTY:????/*?發(fā)送保持寄存器空中斷?*/
????????????????????break;
????????????????case?INT_RCV_SUCCESS:????/*?串口接收可用數(shù)據(jù)中斷?*/
????????????????????RcvNum?=?CH432Seril0Rcv(?buf?);
					buf[RcvNum]=0;
					printf("%s",?buf?);
//????????????????????UART0_SendByte(?RcvNum?);
//????????????????????CH432Seril0Send(?buf,?RcvNum?);
????????????????????break;
????????????????case?INT_RCV_LINES?:????/*?接收線路狀態(tài)中斷?*/
????????????????????ReadCH432Data(?CH432_LSR_PORT);
????????????????????break;
????????????????case?INT_RCV_OVERTIME:????/*?接收數(shù)據(jù)超時中斷?*/
????????????????????RcvNum?=?CH432Seril0Rcv(?buf?);
					buf[RcvNum]=0;
					printf("%s",?buf?);
//????????????????????UART0_SendByte(?RcvNum?);
//????????????????????CH432Seril0Send(?buf,?RcvNum?);
????????????????????break;
????????????????default:????/*?不可能發(fā)生的中斷?*/
????????????????????break;
????????????}
????????}
????}
????return(?InterruptStatus?);
}



一頁蘩華 發(fā)表于: 2021-02-08 13:59:11
8# 
目前發(fā)現(xiàn)下面的配置通訊是比較穩(wěn)定的，BIT_IER_IETHRE?中斷必須屏蔽，否則無法接收，請問是什么原因
void?InitCH432(?void?)????/*?初始化CH432?*/
{
????UINT16?div;
????UINT8?DLL,?DLM;
/**************************************************************************
??????????設(shè)置CH432串口0的寄存器

**************************************************************************/
????div?=?(?Fpclk?>>?4?)?/?CH432_BPS0;
????DLM?=?div?>>?8;
????DLL?=?div?&?0xff;
????WriteCH432Data(?CH432_IER_PORT,?BIT_IER_RESET);??//端口復(fù)位//
????WriteCH432Data(?CH432_LCR_PORT,?BIT_LCR_DLAB?);????/*?設(shè)置DLAB為1?*/
????WriteCH432Data(?CH432_DLL_PORT,?DLL?);????/*?設(shè)置波特率?*/
????WriteCH432Data(?CH432_DLM_PORT,?DLM?);
????WriteCH432Data(?CH432_FCR_PORT,?BIT_FCR_RECVTG1?|?BIT_FCR_RECVTG0?|?BIT_FCR_FIFOEN?);????/*?設(shè)置FIFO模式，觸發(fā)點(diǎn)為14?*/
????WriteCH432Data(?CH432_LCR_PORT,?BIT_LCR_WORDSZ1?|?BIT_LCR_WORDSZ0?);????/*?字長8位，1位停止位、無校驗(yàn)?*/
????WriteCH432Data(?CH432_IER_PORT,?BIT_IER_IEMODEM?|?BIT_IER_IELINES?|?/*BIT_IER_IETHRE?|*/?BIT_IER_IERECV);????/*?使能中斷?*/
????WriteCH432Data(?CH432_MCR_PORT,?BIT_MCR_OUT2);????/*?允許中斷輸出,DTR,RTS為1?*/

/**************************************************************************
??????????設(shè)置CH432串口1的寄存器

**************************************************************************/
????div?=?(?Fpclk?>>?4?)?/?CH432_BPS1;
????DLM?=?div?>>?8;
????DLL?=?div?&?0xff;
????WriteCH432Data(?CH432_IER1_PORT,?BIT_IER_RESET);??//端口復(fù)位//
????WriteCH432Data(?CH432_LCR1_PORT,?BIT_LCR_DLAB?);????/*?設(shè)置DLAB為1?*/
????WriteCH432Data(?CH432_DLL1_PORT,?DLL?);????/*?設(shè)置波特率?*/
????WriteCH432Data(?CH432_DLM1_PORT,?DLM?);
????WriteCH432Data(?CH432_FCR1_PORT,?BIT_FCR_RECVTG1?|?BIT_FCR_RECVTG0?|?BIT_FCR_FIFOEN?);????/*?設(shè)置FIFO模式，觸發(fā)點(diǎn)為14?*/
????WriteCH432Data(?CH432_LCR1_PORT,?BIT_LCR_WORDSZ1?|?BIT_LCR_WORDSZ0?);????/*?字長8位，1位停止位、無校驗(yàn)?*/
????WriteCH432Data(?CH432_IER1_PORT,?BIT_IER_IEMODEM?|?BIT_IER_IELINES?|?/*BIT_IER_IETHRE?|*/?BIT_IER_IERECV);????/*?使能中斷?*/
????WriteCH432Data(?CH432_MCR1_PORT,?BIT_MCR_OUT2);????/*?允許中斷輸出，DTR,RTS為1?*/

}


Felix 發(fā)表于: 2021-02-09 10:30:46
9#

您好：

THR中斷是“發(fā)送保持寄存器空”中斷，當(dāng)您的THR寄存器空時會產(chǎn)生該中斷。如果當(dāng)您開啟這個中斷卻導(dǎo)致無法接收數(shù)據(jù)，您可以檢查INT引腳是否為低電平，若INT引腳為低電平則說明有中斷沒有清除，可以查詢IIR 寄存器以判斷相應(yīng)中斷并清除中斷。

一頁蘩華 發(fā)表于: 2021-02-09 14:08:41
10#

目前來看，開啟的狀態(tài)下，則無法產(chǎn)生中斷，屏蔽狀態(tài)下，就可以產(chǎn)生中斷，測試久了也不穩(wěn)定，中斷函數(shù)如下：

UINT8?CH432Interrupt(void)??/*?中斷方式處理?*/
{
????UINT8?InterruptStatus;
????UINT8?RcvNum?=?0,?i;
????while(1)
????{
????????InterruptStatus?=?ReadCH432Data(?CH432_IIR_PORT?)?&?(?~?CH432_IIR_FIFOS_ENABLED?);
????????if(?(?InterruptStatus?&?0x01?)?)????/*?沒有中斷轉(zhuǎn)到串口1?*/
????????{}
????????else
????????{
????????	switch(?InterruptStatus?)
????????????{
????????????????case?INT_NOINT:????/*?沒有中斷?*/
????????????????????????break;
????????????????case?INT_THR_EMPTY:????/*?發(fā)送保持寄存器空中斷?*/
????????????????		printf("INT_THR_EMPTY\r\n");
????????????????????????break;
????????????????case?INT_RCV_SUCCESS:????/*?串口接收可用數(shù)據(jù)中斷?*/
????????????????????????RcvNum?=?CH432Seril0Rcv(?uart_dma_rx_buf3?);
????????????????????????break;
????????????????case?INT_RCV_LINES:????/*?接收線路狀態(tài)中斷?*/
????????????????????????ReadCH432Data(?CH432_LSR_PORT);
????????????????????????break;
????????????????case?INT_RCV_OVERTIME:????/*?接收數(shù)據(jù)超時中斷?*/
????????????????????????RcvNum?=?CH432Seril0Rcv(?uart_dma_rx_buf3?);
????????????????????????break;
????????????????default:????/*?不可能發(fā)生的中斷?*/
????????????????????????break;
????????????}
????????}

????????InterruptStatus?=?ReadCH432Data(?CH432_IIR1_PORT?)?&?(?~?CH432_IIR_FIFOS_ENABLED?);????/*?讀串口1的中斷狀態(tài)?*/
????????if(?(?InterruptStatus?&?0x01?)?)???break;??/*?沒有中斷退出?*/
????????else
????????{
????????????switch(?InterruptStatus?)
????????????{
????????????????case?INT_NOINT:????/*?沒有中斷?*/
????????????????????break;
????????????????case?INT_THR_EMPTY:????/*?發(fā)送保持寄存器空中斷?*/
????????????????	printf("INT_THR1_EMPTY\r\n");
????????????????????break;
????????????????case?INT_RCV_SUCCESS:????/*?串口接收可用數(shù)據(jù)中斷?*/
????????????????????RcvNum?=?CH432Seril1Rcv(uart_dma_rx_buf4);
????????????????????break;
????????????????case?INT_RCV_LINES:????/*?接收線路狀態(tài)中斷?*/
????????????????????ReadCH432Data(?CH432_LSR1_PORT);
????????????????????break;
????????????????case?INT_RCV_OVERTIME:????/*?接收數(shù)據(jù)超時中斷?*/
????????????????????RcvNum?=?CH432Seril1Rcv(uart_dma_rx_buf4);
????????????????????break;
????????????????default:????/*?不可能發(fā)生的中斷?*/
????????????????????break;
????????????}
????????}
????}
????return(?InterruptStatus?);
}


一頁蘩華 發(fā)表于: 2021-02-23 16:24:00
11#

屏蔽BIT_IER_IETHRE中斷，是否會導(dǎo)致接收不穩(wěn)定的情況

Felix 發(fā)表于: 2021-02-23 19:10:05
12#

您好：

屏蔽BIT_IER_IETHRE中斷是可以正常收發(fā)數(shù)據(jù)的，發(fā)送數(shù)據(jù)是由您主動發(fā)起，可以不用開啟發(fā)送寄存器空中斷，不會造成不穩(wěn)定的情況

一頁蘩華 發(fā)表于: 2021-02-24 09:00:52
13#

我現(xiàn)在的情況，就是只有屏蔽BIT_IER_IETHRE才能正常接收數(shù)據(jù)，不屏蔽就產(chǎn)生了一次INT_THR_EMPTY中斷，就無法再進(jìn)入中斷了，請問這可能是什么原因?qū)е碌?/p>

Felix 發(fā)表于: 2021-02-26 16:43:12
14#

您好：

在初始化結(jié)束后，您可以先檢查一下各個寄存器寫入的值是否正確，如果配置的值和預(yù)想的值不一樣的話，可能是以下原因。

IETHR由0到1時會產(chǎn)生一個INT_THR_EMPTY中斷。在初始化時，您先是寫了一個“IETHR由0到1”從而產(chǎn)生了一個INT_THR_EMPTY中斷，而在后續(xù)的打開MCR寄存器的OUT2位時，相當(dāng)于允許了串口的中斷輸出，使INT#引腳拉低，進(jìn)入中斷服務(wù)函數(shù)，在這個過程中，可能導(dǎo)致您的某些寄存器的配置出現(xiàn)錯誤。

解決方法有：

1.SPI的接口函數(shù)要按照以下格式（推薦該方法）。

接口函數(shù)（）

{

? ?SCS拉高? ? //避免某些情況（如中斷）導(dǎo)致的SCS狀態(tài)不正常，從而影響到后續(xù)的數(shù)據(jù)寫入

? ?SCS拉低

? ?輸入數(shù)據(jù)

? ?SCS拉高

}

2.在初始化CH432后，再開啟中斷，并在開啟中斷后讀CH432的中斷類型清中斷。


一頁蘩華 發(fā)表于: 2021-04-09 16:14:05
15# 
#define?CH432_BPS0?230400????/*?定義CH432串口0通訊波特率?*/
#define?CH432_BPS1?230400????/*?定義CH432串口1通訊波特率?*/
#define?Fpclk??????(1843200)?//1843200????/*?定義內(nèi)部時鐘頻率????*/
如何設(shè)置CH432的波特率未230400，外部晶振22.1184MHz


Felix 發(fā)表于: 2021-04-12 13:17:46
16#

您好

波特率的設(shè)置公式是：所需通訊波特率 =?串口內(nèi)部基準(zhǔn)時鐘 / 16 / DLL和DLM寄存器值

其中串口內(nèi)部基準(zhǔn)時鐘由晶振以及內(nèi)部倍頻決定。由下表可知，當(dāng)使用22.1184MHz晶振，內(nèi)部2倍頻時，最大波特率為2.7648Mbps。

image.png


即，所需配置為

  1. 先配置CK2X位為1，使用內(nèi)部2倍頻，此時的內(nèi)部基準(zhǔn)時鐘為44.2368MHz。

  2. 根據(jù)公式代入所需230400的波特率，可以得出DLL和DLM寄存器的值為12，所以配置DLL的值為0x0C，DLM的值為0x00。

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