icE1usb fw: Add GPIO access functions
The 32 bit register is split in different fields to speed up
access to the 'in' field. The oe/out fields can't be split because
all writes are 32 bit wide (i.e. no support for byte enable in the
gateware)
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Change-Id: Ic25377bb777e5d25939f0e8cfe6b7c6ef8641f6d
diff --git a/firmware/ice40-riscv/icE1usb/misc.h b/firmware/ice40-riscv/icE1usb/misc.h
index b4baef1..76d5a7d 100644
--- a/firmware/ice40-riscv/icE1usb/misc.h
+++ b/firmware/ice40-riscv/icE1usb/misc.h
@@ -26,6 +26,10 @@
void pdm_set(int chan, bool enable, unsigned value, bool normalize);
+void gpio_dir(int n, bool output);
+void gpio_out(int n, bool val);
+bool gpio_in(int n);
+
void e1_led_run(void);
void e1_led_pause(void);
void e1_led_set(bool enable, uint8_t cfg);