retronetworking
/
osmo-e1-hardware
mirror of https://gerrit.osmocom.org/osmo-e1-hardware
13
0
Fork 0
Code Issues Projects Releases Wiki Activity

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
This commit is contained in:
Sylvain Munaut 2022-01-11 11:08:25 +01:00
parent 394748ab86
commit be5a53a4fe
2 changed files with 38 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
firmware/ice40-riscv/icE1usb/misc.c
View File

@ -15,7 +15,11 @@
struct misc {
uint32_t warmboot;
uint32_t gpio;
struct {
uint16_t oe_out;
uint8_t in;
uint8_t _rsvd;
} gpio;
uint32_t e1_led;
uint32_t _rsvd;
struct {
@ -46,6 +50,35 @@ pdm_set(int chan, bool enable, unsigned value, bool normalize)
}
void
gpio_dir(int n, bool output)
{
uint16_t mask = 256 << n;
if (output)
misc_regs->gpio.oe_out |= mask;
else
misc_regs->gpio.oe_out &= ~mask;
}
void
gpio_out(int n, bool val)
{
uint16_t mask = 1 << n;
if (val)
misc_regs->gpio.oe_out |= mask;
else
misc_regs->gpio.oe_out &= ~mask;
}
bool
gpio_in(int n)
{
return (misc_regs->gpio.in & (1 << n)) != 0;
}
void
e1_led_run(void)
{

4
firmware/ice40-riscv/icE1usb/misc.h
View File

@ -26,6 +26,10 @@ enum pdm_chan {
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);