Tool/software: TI C/C++ Compiler
Can someone tell the place for finding event ids and interrupt numbers for creating HWI for GPIO 8-22.
Hi Dhruv,
You can find GPIO interrupt numbers in AM572x TRM, section 17.3 Interrupt Controllers Integration
Check below user guide regarding HWI configuration:
Regards,
Pavel
Dhruv,
I would suggest you to explore AM572x GPIO LED example (link below). This example is using GPIO pin and crossbar.
pdk_am57xx_1_0_15/packages//ti/drv/gpio/test/led_blink/src/am572x/GPIO_idkAM572x_board.c
pdk_am57xx_1_0_15/packages/ti/drv/gpio/test/led_blink/src/main_led_blink.c
In this example, GPIO7_22 pin is used (STATUS LED 1 Yellow).
Regards,
Pavel
Hi Pavel,
// CSL_XBAR_GPIO8_IRQ_1 = 116;
#define CSL_XBAR_INST_DSP1_IRQ_62 (31U)
CSL_xbarIrqConfigure(CSL_XBAR_IRQ_CPU_ID_DSP1, CSL_XBAR_INST_DSP1_IRQ_62, CSL_XBAR_GPIO8_IRQ_1);
DSP1 we can use crossbar value from 1-64 only. TRM : Table 17-3. DSP1_INTC Default Interrupt Mapping, find the attachment.
CSL_XBAR_INST_DSP1_IRQ_62 is reserved. we want to map GPIO8_IRQ_1 to DSP1_IRQ_62. is it possible?
Hi Pavel,
What you observed is correct for gpio bank 2, in ARM linux side we have written interrupt handler, because of that in DSP core also we are receiving interrupt,
we don't know why both ARM and DSP getting interrupt.
For GPIO Bank 8, gpio 8_22 is connected to FPGA, FPGA is giving every 9th milliseconds interrupt to DSP.
if we use GPIO8 interrupt 1 than ARM linux following error occurring after receiving 1st interrupt in DSP core.
************************************************ configure gpio 8_22 hwi interrupt GPIO8_IRQ_1 DSP **********************************
uint32_t gpio_base_address = SOC_GPIO8_BASE; //0x48053000U
uint32_t gpio_pin = 0x16; //22
CSL_xbarIrqConfigure(CSL_XBAR_IRQ_CPU_ID_DSP1, CSL_XBAR_INST_DSP1_IRQ_62, CSL_XBAR_GPIO8_IRQ_1);
GPIO_init();
GPIOModuleReset(gpio_base_address);
GPIOModuleEnable(gpio_base_address);
GPIOIntTypeSet(gpio_base_address, gpio_pin, GPIO_INT_TYPE_RISE_EDGE);
GPIODirModeSet(gpio_base_address, gpio_pin, GPIO_DIR_INPUT);
GPIOPinIntDisable(gpio_base_address, GPIO_INT_LINE_1, gpio_pin);
GPIOPinIntClear(gpio_base_address, GPIO_INT_LINE_1, gpio_pin);
GPIOTriggerPinInt(gpio_base_address, GPIO_INT_LINE_1, gpio_pin);
GPIOPinIntEnable(gpio_base_address, GPIO_INT_LINE_1, gpio_pin);
GPIOPinIntWakeUpEnable(gpio_base_address,GPIO_INT_LINE_1,gpio_pin);
Hwi_Handle gpio_int_h;
Hwi_Params hwiInputParams;
Hwi_Params_init(&hwiInputParams);
hwiInputParams.name = "GPIO_8_22";
hwiInputParams.arg = 0;
hwiInputParams.priority = 0;
hwiInputParams.evtId = 62
gpio_int_h = Hwi_create(11, (Hwi_Fxn)slot_intr_Handler, &hwiInputParams);
if (gpio_int_h == NULL)
{
Log_print0(Diags_USER1,"Error :- GPIO 8_22 Hwi not created ");
ASSERTION((0), "Error:- GPIO8_22 Hwi not created");
}
}
**************************************************************************************************************************
************************************* ARM Linux Error ****************************************************************
root@am57xx-phycore-rdk:~# [ 102.046857] irq 289, desc: eea50000, depth: 1, count: 0, unhandled: 0
[ 102.053334] ->handle_irq(): c007e908, handle_bad_irq+0x0/0x280
[ 102.059296] ->irq_data.chip(): eea4ed90, 0xeea4ed90
[ 102.064203] ->action(): (null)
[ 102.067442] IRQ_NOPROBE set
[ 102.070506] unexpected IRQ trap at vector 121
*****************************************************************************************************
if we use GPIO8 interrupt q than ARM linux error not happen with GPIOPinIntDisable(gpio_base_address, GPIO_INT_LINE_1, gpio_pin);. but we are receiving so unwanted interrupt in DSP core every 300 micro-seconds. we can use only gpio 8 interrupt 2, correct? because gpio 8 interrupt 1 is mapped to MPU (ARM linux)
************************************************ configure gpio 8_22 hwi interrupt GPIO8_IRQ_2 DSP **********************************
uint32_t gpio_base_address = SOC_GPIO8_BASE; //0x48053000U
uint32_t gpio_pin = 0x16; //22
CSL_xbarIrqConfigure(CSL_XBAR_IRQ_CPU_ID_DSP1, CSL_XBAR_INST_DSP1_IRQ_62, CSL_XBAR_GPIO8_IRQ_2);
GPIO_init();
GPIOModuleReset(gpio_base_address);
GPIOModuleEnable(gpio_base_address);
GPIOIntTypeSet(gpio_base_address, gpio_pin, GPIO_INT_TYPE_RISE_EDGE);
GPIODirModeSet(gpio_base_address, gpio_pin, GPIO_DIR_INPUT);
GPIOPinIntDisable(gpio_base_address, GPIO_INT_LINE_2, gpio_pin);
GPIOPinIntClear(gpio_base_address, GPIO_INT_LINE_2, gpio_pin);
GPIOTriggerPinInt(gpio_base_address, GPIO_INT_LINE_2, gpio_pin);
GPIOPinIntEnable(gpio_base_address, GPIO_INT_LINE_2, gpio_pin);
GPIOPinIntWakeUpEnable(gpio_base_address,GPIO_INT_LINE_2,gpio_pin);
GPIOPinIntDisable(gpio_base_address, GPIO_INT_LINE_1, gpio_pin);
GPIOPinIntClear(gpio_base_address, GPIO_INT_LINE_1, gpio_pin);
Hwi_Handle gpio_int_h;
Hwi_Params hwiInputParams;
Hwi_Params_init(&hwiInputParams);
hwiInputParams.name = "GPIO_8_22";
hwiInputParams.arg = 0;
hwiInputParams.priority = 0;
hwiInputParams.evtId = 62
gpio_int_h = Hwi_create(11, (Hwi_Fxn)slot_intr_Handler, &hwiInputParams);
if (gpio_int_h == NULL)
{
Log_print0(Diags_USER1,"Error :- GPIO 8_22 Hwi not created ");
ASSERTION((0), "Error:- GPIO8_22 Hwi not created");
}
}
void slot_intr_Handler (UINT32 * arg)
{
static int count = 0,i=0;
GPIOPinIntDisable(gpio_base_address, GPIO_INT_LINE_1, gpio_pin);
//GPIO_PROFILING : gpio 8_13
GPIO_write(GPIO_PROFILING, GPIO_PIN_VAL_HIGH);
for(i=0;i<1000;i++);
GPIO_write(GPIO_PROFILING, GPIO_PIN_VAL_LOW);
Log_print1(Diags_USER1, "***** fpga_gpio_interrupt_Handler count = %d ***** ",count++);
}
**************************************************************************************************************************
here is dump values for GPIO8 bank:
******************** Before Hwi configuration ***************
GPIO read 8_22 enable interrupt
gpio_base_address = 0x48053000 , gpio_pin = 0x16
CM_L4PER_GPIO8_CLKCTRL = 0x20101
CTRL_CORE_PAD_VOUT1_D22 = 0x5000e
CTRL_CORE_DSP1_IRQ_62_63 = 0x20001f
GPIO_IRQSTATUS_1 = 0x0
GPIO_IRQSTATUS_0 = 0x0
GPIO_IRQSTATUS_SET_0 = 0x0
GPIO_IRQSTATUS_SET_1 = 0x0
GPIO_IRQSTATUS_CLR_0 = 0x0
GPIO_IRQSTATUS_CLR_1 = 0x0
GPIO_IRQWAKEN_0 = 0x0
GPIO_IRQWAKEN_1 = 0x0
GPIO_CTRL = 0x2
GPIO_OE = 0xfff4cebf
GPIO_DATAIN = 0xd81711ca
GPIO_DATAOUT = 0xb1140
GPIO_DEBOUNCENABLE = 0x0
GPIO_CLEARDATAOUT = 0xb1140
GPIO_SETDATAOUT = 0xb1140
GPIO read 8_13 enable interrupt
CM_L4PER_GPIO8_CLKCTRL = 0x20101
CTRL_CORE_PAD_VOUT1_D13 = 0x7000e
GPIO_IRQSTATUS_1 = 0x0
GPIO_IRQSTATUS_0 = 0x0
GPIO_IRQSTATUS_SET_0 = 0x0
GPIO_IRQSTATUS_SET_1 = 0x0
GPIO_IRQSTATUS_CLR_0 = 0x0
GPIO_IRQSTATUS_CLR_0 = 0x0
GPIO_IRQWAKEN_0 = 0x0
GPIO_IRQWAKEN_1 = 0x0
GPIO_CTRL = 0x2
GPIO_OE = 0xfff4cebf
GPIO_DATAIN = 0xd81711da
GPIO_DATAOUT = 0xb1140
GPIO_DEBOUNCENABLE = 0x0
GPIO_CLEARDATAOUT = 0xb1140
GPIO_SETDATAOUT = 0xb1140
************************* END ***************************
******************** After Hwi configuration *************
GPIO read 8_22 enable interrupt
gpio_base_address = 0x48053000 , gpio_pin = 0xd
CM_L4PER_GPIO8_CLKCTRL = 0x20101
CTRL_CORE_PAD_VOUT1_D22 = 0x5000e
CTRL_CORE_DSP1_IRQ_62_63 = 0x20015c
GPIO_IRQSTATUS_1 = 0x400000
GPIO_IRQSTATUS_0 = 0x0
GPIO_IRQSTATUS_SET_0 = 0x0
GPIO_IRQSTATUS_SET_1 = 0x400000
GPIO_IRQSTATUS_CLR_0 = 0x0
GPIO_IRQSTATUS_CLR_1 = 0x400000
GPIO_IRQWAKEN_0 = 0x0
GPIO_IRQWAKEN_1 = 0x400000
GPIO_CTRL = 0x2
GPIO_OE = 0x400000
GPIO_DATAIN = 0xd847114a
GPIO_DATAOUT = 0xb1140
GPIO_DEBOUNCENABLE = 0x0
GPIO_CLEARDATAOUT = 0xb1140
GPIO_SETDATAOUT = 0xb1140
GPIO read 8_13 enable interrupt
CM_L4PER_GPIO8_CLKCTRL = 0x20101
CTRL_CORE_PAD_VOUT1_D13 = 0x7000e
GPIO_IRQSTATUS_1 = 0x400000
GPIO_IRQSTATUS_0 = 0x0
GPIO_IRQSTATUS_SET_0 = 0x0
GPIO_IRQSTATUS_SET_1 = 0x400000
GPIO_IRQSTATUS_CLR_0 = 0x0
GPIO_IRQSTATUS_CLR_0 = 0x400000
GPIO_IRQWAKEN_0 = 0x0
GPIO_IRQWAKEN_1 = 0x400000
GPIO_CTRL = 0x2
GPIO_OE = 0x400000
GPIO_DATAIN = 0xd847114a
GPIO_DATAOUT = 0xb1140
GPIO_DEBOUNCENABLE = 0x0
GPIO_CLEARDATAOUT = 0xb1140
GPIO_SETDATAOUT = 0xb1140
************************* END ***************************
Now gpio interrupt configuration is only enable for gpio 8_22, why we receiving so many interrupts, basically we should receive interrupt every 9th milliseconds only.
please look at the logs,
Please find the attached image. Green probe : FPGA 8-22 interrupt , yellow probe: GPIO_PROFILE 8_13 when we received interrupt.
Thanks,
Dhruv
Hi Pavel,
Now we are not getting so many interrupts, but we are getting sometime 2 interrupt call within 9th millisecond, and also gpio interrupt latency sometime is more than 1 millisecond.
here is our change,
************************************************ configure gpio 8_22 hwi interrupt GPIO8_IRQ_2 DSP **********************************
uint32_t gpio_base_address = SOC_GPIO8_BASE; //0x48053000U
uint32_t gpio_pin = 0x16; //22
CSL_xbarIrqConfigure(CSL_XBAR_IRQ_CPU_ID_DSP1, CSL_XBAR_INST_DSP1_IRQ_62, CSL_XBAR_GPIO8_IRQ_2);
GPIO_init();
GPIOModuleReset(gpio_base_address);
GPIOModuleEnable(gpio_base_address);
GPIOIntTypeSet(gpio_base_address, gpio_pin, GPIO_INT_TYPE_RISE_EDGE);
GPIODirModeSet(gpio_base_address, gpio_pin, GPIO_DIR_INPUT);
GPIOPinIntDisable(gpio_base_address, GPIO_INT_LINE_2, gpio_pin);
GPIOPinIntClear(gpio_base_address, GPIO_INT_LINE_2, gpio_pin);
GPIOPinIntEnable(gpio_base_address, GPIO_INT_LINE_2, gpio_pin);
Hwi_Handle gpio_int_h;
Hwi_Params hwiInputParams;
Hwi_Params_init(&hwiInputParams);
hwiInputParams.name = "GPIO_8_22";
hwiInputParams.arg = 0;
hwiInputParams.priority = 0;
hwiInputParams.evtId = 62
gpio_int_h = Hwi_create(11, (Hwi_Fxn)slot_intr_Handler, &hwiInputParams);
if (gpio_int_h == NULL)
{
Log_print0(Diags_USER1,"Error :- GPIO 8_22 Hwi not created ");
ASSERTION((0), "Error:- GPIO8_22 Hwi not created");
}
}
void slot_intr_Handler (UINT32 * arg)
{
static int count = 0,i=0;
GPIOPinIntClear(gpio_base_address, GPIO_INT_LINE_2, gpio_pin);
//GPIO_PROFILING : gpio 8_13
GPIO_write(GPIO_PROFILING, GPIO_PIN_VAL_HIGH);
for(i=0;i<1000;i++);
GPIO_write(GPIO_PROFILING, GPIO_PIN_VAL_LOW);
Log_print1(Diags_USER1, "***** fpga_gpio_interrupt_Handler count = %d ***** ",count++);
}
1. Why our interrupt handler called by 2 times?
2. why so much latency we observed some time?
Thanks,
Dhruv
1.
2. GPIO interrupt latency some time more than 1 millisecond.
3. GPIO interrupt handler called 2 times.
Hi Pavel,
we got some more observation, actually we have registered 2 Hwi, one for PCI interface and one for GPIO 8-22, PCI interrupt handler was already present in project code base, but PIC Hwi has different EventId and Interrupt number,
***************************************** PCIE Hwi Configuration *****************************************
HwiP_Params hwiInputParams;
uint32_t cpuEvent = 48;
uint32_t xbarIndex = cpuEvent - 31;
uint32_t vector = 12;
CSL_xbarIrqConfigure (CSL_XBAR_IRQ_CPU_ID_DSP1, xbarIndex, CSL_XBAR_PCIe_SS1_IRQ_INT1);
HwiP_Params_init (&hwiInputParams);
hwiInputParams.name = "PCIEEP_MSI_AND_INTX";
hwiInputParams.arg = (uintptr_t)ephandle;
hwiInputParams.priority = 0;
hwiInputParams.evtId = cpuEvent;
ephandle->pcieHwi = HwiP_create(vector, PCIE_EP_Isr, &hwiInputParams);
if (! ephandle->pcieHwi)
{
PCIE_logPrintf("Hwi create failed\n");
}
Its possible that both interrupt came as same time, how we can handle that ? we are not sure but it's look like when both interrupt came as same time we are getting 2 time interrupt handler called.
Thanks,
Dhruv
yello probe : GPIO8_22 interrupt handler gpio probe
green probe : PCIE interrupt handler gpio probe
1. Interrupt handler called once.
2. interrupt handler called 2 times.
3.
Hi Pavel,
Thanks for the reply,
gpio 8_22 ISR called 2 times, 2 times from GPIO8 module?
Yes, It's look like from GPIO8 module only, we are doing configuration with CSL_xbarIrqConfigure(); only, we are not configuring statically with cfg script.
we tried with GPIO led example code, we are not getting any interrupt in DSP and Linux console continues IRQ error showing,
here is code example,
#define GPIO_FPGA_INTR_PORT_NUM 0x8
#define GPIO_FPGA_INTR_PIN_NUM 0x16
enum BOSE_GPIO_CONFIG_INDEX {
GPIO_FPGA_INTR,
};
GPIO_PinConfig gpioPinConfigs[] = {
GPIO_DEVICE_CONFIG(GPIO_FPGA_INTR_PORT_NUM, GPIO_FPGA_INTR_PIN_NUM) |
GPIO_CFG_INPUT | GPIO_CFG_IN_INT_RISING,
}
GPIO_v1_Config GPIO_v1_config = {
gpioPinConfigs,
gpioCallbackFunctions,
sizeof(gpioPinConfigs) / sizeof(GPIO_PinConfig),
sizeof(gpioCallbackFunctions) / sizeof(GPIO_CallbackFxn),
0x20,
};
GPIO_CallbackFxn gpioCallbackFunctions[] = {NULL};
CSL_xbarIrqConfigure(CSL_XBAR_IRQ_CPU_ID_DSP1,CSL_XBAR_INST_DSP1_IRQ_62,CSL_XBAR_GPIO8_IRQ_1);
GPIO_setCallback(GPIO_FPGA_INTR, slot_intr_Handler);
GPIO_enableInt(GPIO_FPGA_INTR);
tried with :- CSL_xbarIrqConfigure(CSL_XBAR_IRQ_CPU_ID_DSP1,CSL_XBAR_INST_DSP1_IRQ_62,CSL_XBAR_GPIO8_IRQ_2); also, same observation.
Note: GPIO BANK8 interrupts by default not mapped with DSP1 core.
Thanks,
Dhruv
Dhruv,
I can provide you below suggestions:
1. Make sure you are not using gpio8_22 on Linux side also. Check below e2e threads for details:
2. By default PCIe interrupts are mapped to DSP1_IRQ_48/38/39 in below files:
pdk_am57xx_1_0_15/packages/ti/csl/example/pcie/write_loopback/rc/rc_write_loopback_app_main.c
pdk_am57xx_1_0_15/packages/ti/csl/example/pcie/write_loopback/ep/ep_write_loopback_app_main.c
pdk_am57xx_1_0_15/packages/ti/drv/pcie/example/sample/am57x/src/pcie_sample_board.c
Make sure you are not changing PCIe driver to map PCIe irq to DSP1_IRQ_62
3. You ISR slot_intr_Handler() looks very huge, but it should be as small/fast as possible. Please align it to main_led_blink.c ISR AppGpioCallbackFxn().
Regards,
Pavel
