What is the MIO operation method of PS in Zynq
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Before writing the program, let's first understand the BANK distribution of GPIO. GPIO has four BANK, which should be distinguished from the BANK of MIO. BANK0 controls 32 signals, BANK1 controls 22 signals, which is 54 pins of MIO. BANK2 and BANK3 can control 64 PL pins. Each group has three signals, input EMIOGPIOI, output EMIOGPIOO, output enable EMIOGPIOTN, a total of 192 signals.
The following picture shows the control of GPIO, the experiment will use the output part of the register, data register DATA, data mask register MASK_DATA_LSW,MASK_DATA_MSW, direction control register DIRM, output enable controller OEN.
In the program, the following functions are used to set direction and output enable:
Int main ()
{
XGpioPs_Config * GPIO_CONFIG
Int Status
/ / General modus operandi to find GPIO list
GPIO_CONFIG= XGpioPs_LookupConfig (MIO_0_ID)
/ / Detection of Exception
Status= XGpioPs_CfgInitialize (& GPIO_PTR, GPIO_CONFIG, GPIO_CONFIG- > BaseAddr)
If (Status! = XST_SUCCESS)
{
Return XST_FAILURE
}
/ / set the PIN pin direction of MIO
XGpioPs_SetDirectionPin (& GPIO_PTR,0, GPIO_OUTPUT)
XGpioPs_SetDirectionPin (& GPIO_PTR,13, GPIO_OUTPUT)
/ / enable PIN pin output of MIO
XGpioPs_SetOutputEnablePin (& GPIO_PTR,0, GPIO_OUTPUT)
XGpioPs_SetOutputEnablePin (& GPIO_PTR,13, GPIO_OUTPUT)
While (1)
{
XGpioPs_WritePin (& GPIO_PTR,0, 1)
XGpioPs_WritePin (& GPIO_PTR,13, 0)
Usleep (100000)
XGpioPs_WritePin (& GPIO_PTR,0, 0)
XGpioPs_WritePin (& GPIO_PTR,13, 1)
Usleep (100000)
}
Return 0
}
Realize the flicker of two LED
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