网站自然优化自学,微营销推广平台有哪些,wordpress群发邮件,梧州论坛 红豆社区A20GPIO中断类型差别结果迥异的问题思考 最近在使用全志A20做开发时#xff0c;发现在处理中断的时候#xff0c;用电平触发模式#xff0c;报中断比较乱#xff0c;用边沿触发则很稳定#xff0c;不会乱报。笔者感到比较困惑#xff0c;笔者用电平触发写的code如下…A20GPIO中断类型差别结果迥异的问题思考 最近在使用全志A20做开发时发现在处理中断的时候用电平触发模式报中断比较乱用边沿触发则很稳定不会乱报。笔者感到比较困惑笔者用电平触发写的code如下 reverseHandle sw_gpio_irq_request(gReverseCar_gpio_hdle.gpio, TRIG_LEVL_HIGH, \sw_reverseCar_irq_Handle, privateData);if (!reverseHandle) {printk(Failed to get gpio irq for reverse car detection\n);}privateData.trigtype TRIG_LEVL_HIGH;static int sw_reverseCar_irq_Handle(void *para){printk(IRQ sw_reverseCar_irq: %d , privateData.trigtype);printk(IO:%d, value:%d\n,gReverseCar_gpio_hdle.gpio, \__gpio_get_value(gReverseCar_gpio_hdle.gpio));sw_gpio_eint_set_enable(gReverseCar_gpio_hdle.gpio, 0);sw_gpio_eint_clr_irqpd_sta(gReverseCar_gpio_hdle.gpio);//TRIG_LEVL_LOW TRIG_LEVL_HIGH TRIG_EDGE_POSITIVE TRIG_EDGE_NEGATIVEif(privateData.trigtype TRIG_LEVL_HIGH) {if(0 sw_gpio_eint_set_trigtype(gReverseCar_gpio_hdle.gpio,TRIG_LEVL_LOW))privateData.trigtype TRIG_LEVL_LOW;} else if(privateData.trigtype TRIG_LEVL_LOW) {if(0 sw_gpio_eint_set_trigtype(gReverseCar_gpio_hdle.gpio,TRIG_LEVL_HIGH))privateData.trigtype TRIG_LEVL_HIGH;}sw_gpio_eint_set_enable(gReverseCar_gpio_hdle.gpio, 1);return 0;
} 中断类型设置成DEBO中断打印信息有问题具体如下 rootandroid:/ # [ 519.018955] IRQ sw_reverseCar_irq: 2 IO:188, value:1
[ 519.024773] IRQ sw_reverseCar_irq: 3 IO:188, value:1
[ 519.030576] IRQ sw_reverseCar_irq: 2 IO:188, value:1
[ 519.036378] IRQ sw_reverseCar_irq: 3 IO:188, value:1
[ 519.042169] IRQ sw_reverseCar_irq: 2 IO:188, value:1[ 520.898643] IRQ sw_reverseCar_irq: 3 IO:188, value:0
[ 520.904456] IRQ sw_reverseCar_irq: 2 IO:188, value:0
[ 520.910363] IRQ sw_reverseCar_irq: 3 IO:188, value:0
[ 520.916215] IRQ sw_reverseCar_irq: 2 IO:188, value:0
[ 520.921995] IRQ sw_reverseCar_irq: 3 IO:188, value:0
[ 520.927832] IRQ sw_reverseCar_irq: 2 IO:188, value:0
[ 520.933612] IRQ sw_reverseCar_irq: 3 IO:188, value:0
[ 520.939432] IRQ sw_reverseCar_irq: 2 IO:188, value:0
[ 520.945317] IRQ sw_reverseCar_irq: 3 IO:188, value:0 用边沿触发写的code如下 gPrivData.trigtype TRIG_EDGE_POSITIVE;gPrivData.irqReqHandle sw_gpio_irq_request(gPrivData.gpio_hdle.gpio, TRIG_EDGE_POSITIVE, \(peint_handle)sw_reverseCar_irq_Handle, (void *)gPrivData);
static int sw_reverseCar_irq_Handle(void *para){//printk(IRQ sw_reverseCar_irq: %d , gPrivData.trigtype);gPrivData.CarStatus __gpio_get_value(gPrivData.gpio_hdle.gpio);//printk(io:%d, value:%d\n,gPrivData.gpio_hdle.gpio, gPrivData.CarStatus);/*if app has no capacity for handle reverse event, system need reboot*/if(1 gPrivData.needRebootFlag) {printk(Reboot for handle reverse in boot now!\n);*(volatile __u32 *)(0xf1c20c94) 0x3; }up(gPrivData.sem_lock);sw_gpio_eint_set_enable(gPrivData.gpio_hdle.gpio, 0);sw_gpio_eint_clr_irqpd_sta(gPrivData.gpio_hdle.gpio);if(gPrivData.trigtype TRIG_EDGE_POSITIVE) {if(0 sw_gpio_eint_set_trigtype(gPrivData.gpio_hdle.gpio,TRIG_EDGE_NEGATIVE))gPrivData.trigtype TRIG_EDGE_NEGATIVE;} else if(gPrivData.trigtype TRIG_EDGE_NEGATIVE) {if(0 sw_gpio_eint_set_trigtype(gPrivData.gpio_hdle.gpio,TRIG_EDGE_POSITIVE))gPrivData.trigtype TRIG_EDGE_POSITIVE;}sw_gpio_eint_set_enable(gPrivData.gpio_hdle.gpio, 1);return 0;
} EDGE时还可以设置中断类型为TRIG_EDGE_DOUBLE笔者暂时没有采用中断打印信息正常如下 rootandroid:/ # [ 517.116361] IRQ sw_reverseCar_irq: 0 io:188, value:1
[ 518.103095] IRQ sw_reverseCar_irq: 1 io:188, value:0rootandroid:/ # [ 520.918512] IRQ sw_reverseCar_irq: 0 io:188, value:1
[ 521.876038] IRQ sw_reverseCar_irq: 1 io:188, value:0
[ 527.796107] IRQ sw_reverseCar_irq: 0 io:188, value:1
[ 528.843397] IRQ sw_reverseCar_irq: 1 io:188, value:0
[ 531.335858] IRQ sw_reverseCar_irq: 0 io:188, value:1
[ 532.306660] IRQ sw_reverseCar_irq: 1 io:188, value:0
[ 534.552011] IRQ sw_reverseCar_irq: 0 io:188, value:1
[ 535.101586] IRQ sw_reverseCar_irq: 1 io:188, value:0 笔者不清楚原因怀疑是芯片驱动的问题但是驱动也就那样写了啊难道是芯片设计的问题当然这种也就是在刚有中断时会有乱irq上来如果用delaywork延时一下处理也是可以绕过去的。望哪位大侠清楚的解释一下。 转载于:https://www.cnblogs.com/james1207/p/3292052.html
