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i2c_software: pass pulse ticks from host

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Signed-off-by: Timofey Titovets <nefelim4ag@gmail.com>
This commit is contained in:
Timofey Titovets 2025-04-09 00:35:00 +02:00 committed by KevinOConnor
parent 841adcfff7
commit a9b04e8536
2 changed files with 17 additions and 12 deletions
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12
klippy/extras/bus.py
View File

@ -160,6 +160,8 @@ class MCU_I2C:
self.bus = bus
self.i2c_address = addr
self.oid = self.mcu.create_oid()
self.speed = speed
self.config_fmt_ticks = None
mcu.add_config_cmd("config_i2c oid=%d" % (self.oid,))
# Generate I2C bus config message
if sw_pins is not None:
@ -167,6 +169,10 @@ class MCU_I2C:
"i2c_set_software_bus oid=%d"
" scl_pin=%s sda_pin=%s rate=%d address=%d"
% (self.oid, sw_pins[0], sw_pins[1], speed, addr))
self.config_fmt_ticks = (
"i2c_set_sw_bus oid=%d"
" scl_pin=%s sda_pin=%s pulse_ticks=%%d address=%d"
% (self.oid, sw_pins[0], sw_pins[1], addr))
else:
self.config_fmt = (
"i2c_set_bus oid=%d i2c_bus=%%s rate=%d address=%d"
@ -186,6 +192,12 @@ class MCU_I2C:
if '%' in self.config_fmt:
bus = resolve_bus_name(self.mcu, "i2c_bus", self.bus)
self.config_fmt = self.config_fmt % (bus,)
if self.config_fmt_ticks:
if self.mcu.try_lookup_command("i2c_set_sw_bus oid=%c"
" scl_pin=%u sda_pin=%u"
" pulse_ticks=%u address=%u"):
pulse_ticks = self.mcu.seconds_to_clock(1./self.speed/2)
self.config_fmt = self.config_fmt_ticks % (pulse_ticks,)
self.mcu.add_config_cmd(self.config_fmt)
self.i2c_write_cmd = self.mcu.lookup_command(
"i2c_write oid=%c data=%*s", cq=self.cmd_queue)

17
src/i2c_software.c
View File

@ -22,28 +22,21 @@ struct i2c_software {
};
void
command_i2c_set_software_bus(uint32_t *args)
command_i2c_set_sw_bus(uint32_t *args)
{
struct i2cdev_s *i2c = i2cdev_oid_lookup(args[0]);
struct i2c_software *is = alloc_chunk(sizeof(*is));
uint32_t rate = args[3];
is->ticks = CONFIG_CLOCK_FREQ / (100000 * 2); // 100KHz
is->ticks = args[3];
is->addr = (args[4] & 0x7f) << 1; // address format shifted
is->scl_in = gpio_in_setup(args[1], 1);
is->scl_out = gpio_out_setup(args[1], 1);
is->sda_in = gpio_in_setup(args[2], 1);
is->sda_out = gpio_out_setup(args[2], 1);
while (rate > 100000) {
rate = rate >> 1;
if (rate < 100000)
break;
is->ticks = is->ticks >> 1;
}
i2cdev_set_software_bus(i2c, is);
}
DECL_COMMAND(command_i2c_set_software_bus,
"i2c_set_software_bus oid=%c scl_pin=%u sda_pin=%u"
" rate=%u address=%u");
DECL_COMMAND(command_i2c_set_sw_bus,
"i2c_set_sw_bus oid=%c scl_pin=%u sda_pin=%u"
" pulse_ticks=%u address=%u");
// The AVR micro-controllers require specialized timing
#if CONFIG_MACH_AVR