diff options
Diffstat (limited to 'c/src/lib/libbsp/arm/altera-cyclone-v/hwlib/src/hwmgr/alt_generalpurpose_io.c')
| -rw-r--r-- | c/src/lib/libbsp/arm/altera-cyclone-v/hwlib/src/hwmgr/alt_generalpurpose_io.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/arm/altera-cyclone-v/hwlib/src/hwmgr/alt_generalpurpose_io.c b/c/src/lib/libbsp/arm/altera-cyclone-v/hwlib/src/hwmgr/alt_generalpurpose_io.c index e2b0135c34..d5b6afad04 100644 --- a/c/src/lib/libbsp/arm/altera-cyclone-v/hwlib/src/hwmgr/alt_generalpurpose_io.c +++ b/c/src/lib/libbsp/arm/altera-cyclone-v/hwlib/src/hwmgr/alt_generalpurpose_io.c @@ -35,6 +35,7 @@ #include "socal/hps.h" #include "socal/socal.h" #include "socal/alt_gpio.h" +#include "socal/alt_rstmgr.h" #include "hwlib.h" #include "alt_generalpurpose_io.h" @@ -53,6 +54,37 @@ /****************************************************************************************/ +/* alt_gpio_init() initializes the GPIO modules */ +/****************************************************************************************/ + +ALT_STATUS_CODE alt_gpio_init(void) +{ + // put GPIO modules into system manager reset if not already there + alt_gpio_uninit(); + // release GPIO modules from system reset (w/ two-instruction delay) + alt_replbits_word(ALT_RSTMGR_PERMODRST_ADDR, ALT_RSTMGR_PERMODRST_GPIO0_SET_MSK | + ALT_RSTMGR_PERMODRST_GPIO1_SET_MSK | + ALT_RSTMGR_PERMODRST_GPIO2_SET_MSK, 0); + return ALT_E_SUCCESS; +} + + +/****************************************************************************************/ +/* alt_gpio_uninit() uninitializes the GPIO modules */ +/****************************************************************************************/ + +ALT_STATUS_CODE alt_gpio_uninit(void) +{ + // put all GPIO modules into system manager reset + alt_replbits_word(ALT_RSTMGR_PERMODRST_ADDR, ALT_RSTMGR_PERMODRST_GPIO0_SET_MSK | + ALT_RSTMGR_PERMODRST_GPIO1_SET_MSK | + ALT_RSTMGR_PERMODRST_GPIO2_SET_MSK, + ALT_GPIO_BITMASK); + return ALT_E_SUCCESS; +} + + +/****************************************************************************************/ /* alt_gpio_port_datadir_set() sets the specified GPIO data bits to use the data */ /* direction(s) specified. 0 = input (default). 1 = output. */ /****************************************************************************************/ |