Dec
14
目标：GPIO - Button 产生Interrupt。Interrupt处理函数中点亮LED
HW：Spartan 3E BSB + Button + LED + UART
手工添加OPB_INTC 1.00.c
连接Button - Interrupt Port到OPB_INTC - Intr Port
连接OPB_INTC - IRQ Port到 MicroBlaze - Interrupt Port
SW：
注:
如果在MSS文件中给peripheral driver添加int_handler parameter，就可以不需要在主程序内register ISR handler了。这个过程中要注意int_port的name是peripheral的pin name，不是signal name。
参考资料：
est_rm.pdf - Appendix B: Interrupt Management
Xapp778
GPIO Datasheet
psf_rm.pdf - Char 6 MSS - INT_HANDLER
附件包含MHS, MSS, BSB, int1.c, xparameters.h
HW：Spartan 3E BSB + Button + LED + UART
手工添加OPB_INTC 1.00.c
连接Button - Interrupt Port到OPB_INTC - Intr Port
连接OPB_INTC - IRQ Port到 MicroBlaze - Interrupt Port
SW：
引用
Main:
1. Initialize LED, set LED direction
2. Initialize Button, set Button direction
3. Start interrupt controller
4. Enable button interrupt
5. Enable MicroBlaze interrupt
6. Register button ISR handler
button_int_handler:
1. Read GPIO_ISR
2. If GPIO_ISR = 1, read button status and set LED status
3. Clear interrupt
1. Initialize LED, set LED direction
2. Initialize Button, set Button direction
3. Start interrupt controller
4. Enable button interrupt
5. Enable MicroBlaze interrupt
6. Register button ISR handler
button_int_handler:
1. Read GPIO_ISR
2. If GPIO_ISR = 1, read button status and set LED status
3. Clear interrupt
注:
如果在MSS文件中给peripheral driver添加int_handler parameter，就可以不需要在主程序内register ISR handler了。这个过程中要注意int_port的name是peripheral的pin name，不是signal name。
引用
BEGIN DRIVER
PARAMETER DRIVER_NAME = gpio
PARAMETER DRIVER_VER = 2.01.a
PARAMETER HW_INSTANCE = Buttons_4Bit
PARAMETER int_handler = button_int_handler, int_port = IP2INTC_IRPT
END
PARAMETER DRIVER_NAME = gpio
PARAMETER DRIVER_VER = 2.01.a
PARAMETER HW_INSTANCE = Buttons_4Bit
PARAMETER int_handler = button_int_handler, int_port = IP2INTC_IRPT
END
参考资料：
est_rm.pdf - Appendix B: Interrupt Management
Xapp778
GPIO Datasheet
psf_rm.pdf - Char 6 MSS - INT_HANDLER
附件包含MHS, MSS, BSB, int1.c, xparameters.h
